commit 911b37533b95dbe160f5ff655e84d19aa8eb51be Author: Able Date: Tue Nov 16 00:09:27 2021 -0600 ableOS build system diff --git a/.cargo/config.toml b/.cargo/config.toml new file mode 100644 index 0000000..22b6ca6 --- /dev/null +++ b/.cargo/config.toml @@ -0,0 +1,2 @@ +[alias] +repbuild = "run --manifest-path ./repbuild/Cargo.toml --" diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..6ea2636 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +repbuild/target +ableos/target diff --git a/ableos/.cargo/config.toml b/ableos/.cargo/config.toml new file mode 100644 index 0000000..3526375 --- /dev/null +++ b/ableos/.cargo/config.toml @@ -0,0 +1,11 @@ +[build] +target = "./json_targets/x86_64-ableos.json" + +[unstable] +build-std-features = ["compiler-builtins-mem"] +build-std = ["core", "compiler_builtins"] + + +[target.'cfg(target_arch = "x86_64")'] +# --quiet suppresses warning messages from the bootimage crate +runner = "bootimage runner --quiet" diff --git a/ableos/.github/workflows/rust.yml b/ableos/.github/workflows/rust.yml new file mode 100644 index 0000000..8941734 --- /dev/null +++ b/ableos/.github/workflows/rust.yml @@ -0,0 +1,22 @@ +name: Build + +on: + - push + - pull_request + +env: + CARGO_TERM_COLOR: always + +jobs: + build: + runs-on: ubuntu-latest + + steps: + - uses: actions/checkout@v2 + - uses: actions-rs/toolchain@v1 + with: + components: rust-src + - uses: actions-rs/cargo@v1 + with: + command: build + args: --release diff --git a/ableos/.vscode/settings.json b/ableos/.vscode/settings.json new file mode 100644 index 0000000..f5dcd89 --- /dev/null +++ b/ableos/.vscode/settings.json @@ -0,0 +1,5 @@ +{ + "files.associations": { + "stddef.h": "c" + } +} \ No newline at end of file diff --git a/ableos/Cargo.lock b/ableos/Cargo.lock new file mode 100644 index 0000000..571238b --- /dev/null +++ b/ableos/Cargo.lock @@ -0,0 +1,202 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "ableos" +version = "0.1.0" +dependencies = [ + "bootloader", + "cpuio", + "lazy_static", + "pic8259", + "psp", + "spin", + "uart_16550", + "volatile 0.2.7", + "x86_64", +] + +[[package]] +name = "bit_field" +version = "0.10.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "dcb6dd1c2376d2e096796e234a70e17e94cc2d5d54ff8ce42b28cef1d0d359a4" + +[[package]] +name = "bitflags" +version = "1.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a" + +[[package]] +name = "bootloader" +version = "0.9.19" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b7c452074efc3c0bfb241fb7bc87df04741c7c85e926f6a07c05f8fbd6008240" + +[[package]] +name = "cpuio" +version = "0.3.0" +source = "git+https://github.com/anyusernameworks/cpuio.git#3908ecab79df80670ee1c5121870fc131f07627b" + +[[package]] +name = "derivative" +version = "2.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "lazy_static" +version = "1.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646" +dependencies = [ + "spin", +] + +[[package]] +name = "num_enum" +version = "0.5.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3f9bd055fb730c4f8f4f57d45d35cd6b3f0980535b056dc7ff119cee6a66ed6f" +dependencies = [ + "derivative", + "num_enum_derive", +] + +[[package]] +name = "num_enum_derive" +version = "0.5.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "486ea01961c4a818096de679a8b740b26d9033146ac5291b1c98557658f8cdd9" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "paste" +version = "0.1.18" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "45ca20c77d80be666aef2b45486da86238fabe33e38306bd3118fe4af33fa880" +dependencies = [ + "paste-impl", + "proc-macro-hack", +] + +[[package]] +name = "paste-impl" +version = "0.1.18" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d95a7db200b97ef370c8e6de0088252f7e0dfff7d047a28528e47456c0fc98b6" +dependencies = [ + "proc-macro-hack", +] + +[[package]] +name = "pic8259" +version = "0.10.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "24ec21f514e2e16e94649f1d041ca4a7069b512c037ac156360652a775e6229d" +dependencies = [ + "x86_64", +] + +[[package]] +name = "proc-macro-hack" +version = "0.5.19" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5" + +[[package]] +name = "proc-macro2" +version = "1.0.32" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43" +dependencies = [ + "unicode-xid", +] + +[[package]] +name = "psp" +version = "0.1.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0b3021953a10d1bc6735a606ab9d5a1510282df7a55a160a270e9ea3cf479669" +dependencies = [ + "bitflags", + "num_enum", + "num_enum_derive", + "paste", +] + +[[package]] +name = "quote" +version = "1.0.10" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05" +dependencies = [ + "proc-macro2", +] + +[[package]] +name = "spin" +version = "0.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d" + +[[package]] +name = "syn" +version = "1.0.81" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f2afee18b8beb5a596ecb4a2dce128c719b4ba399d34126b9e4396e3f9860966" +dependencies = [ + "proc-macro2", + "quote", + "unicode-xid", +] + +[[package]] +name = "uart_16550" +version = "0.2.15" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "65ad019480ef5ff8ffe66d6f6a259cd87cf317649481394981db1739d844f374" +dependencies = [ + "bitflags", + "x86_64", +] + +[[package]] +name = "unicode-xid" +version = "0.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3" + +[[package]] +name = "volatile" +version = "0.2.7" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f6b06ad3ed06fef1713569d547cdbdb439eafed76341820fb0e0344f29a41945" + +[[package]] +name = "volatile" +version = "0.4.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e4c2dbd44eb8b53973357e6e207e370f0c1059990df850aca1eca8947cf464f0" + +[[package]] +name = "x86_64" +version = "0.14.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bbc6ed1ed2cd4536b083c34041aff7b84448ee25ac4aa5e9d54802ce226f9815" +dependencies = [ + "bit_field", + "bitflags", + "volatile 0.4.4", +] diff --git a/ableos/Cargo.toml b/ableos/Cargo.toml new file mode 100644 index 0000000..077645a --- /dev/null +++ b/ableos/Cargo.toml @@ -0,0 +1,40 @@ +[package] +name = "ableos" +version = "0.1.0" +edition = "2021" +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[profile.release] +panic = "abort" + +[package.metadata.bootimage] +test-args = [ + "-device", "isa-debug-exit,iobase=0xf4,iosize=0x04", "-serial", "stdio" +] +run-args=["-serial", "stdio"] + +[dependencies] +spin = "0.5.2" +# linked_list_allocator = "0.9.0" + +[dependencies.lazy_static] +features = ["spin_no_std"] +version = "1.0" + +# alloc required +# [dependencies.wasmi] +# version = "*" +# default-features = false +# features = ["core"] + + +[target.'cfg(target_arch = "mips")'.dependencies] +psp = "0.1.5" + +[target.'cfg(target_arch = "x86_64")'.dependencies] +volatile = "0.2.6" +bootloader = "0.9.8" +cpuio = { git = "https://github.com/anyusernameworks/cpuio.git" } +x86_64 = "*" +uart_16550 = "0.2.0" +pic8259 = "0.10.1" diff --git a/ableos/README.md b/ableos/README.md new file mode 100644 index 0000000..7bf8b0c --- /dev/null +++ b/ableos/README.md @@ -0,0 +1,22 @@ +# ableOS +![Discord](https://img.shields.io/discord/831368967385120810) ![Code Size](https://img.shields.io/github/languages/code-size/abletheabove/ableos) +## Set up +Install [Qemu](https://www.qemu.org/) + +> On Windows be sure to add `C:\Program Files\qemu` to your `PATH` variable + +`rustup component add rust-src` + +`rustup component add llvm-tools-preview` + +`cargo install bootimage` + +## Srange workarounds +- arm/build.rs has to move main.rs +- conditional dependencies for bootloader are broken +## Testing on real hardware +I recommend using an old x86_64 computer +* `cargo run --release` to generate a binary image that is bootable +* flash it to a USB device via `dd` or belenaEtcher +* Remove said USB device and plug into test machine +* assure test machine boots from USB devices diff --git a/ableos/TODO.md b/ableos/TODO.md new file mode 100644 index 0000000..cedd21b --- /dev/null +++ b/ableos/TODO.md @@ -0,0 +1,2 @@ +- [ ] Simple interactive "painting" "program" +- [ ] monotty like desktop environment diff --git a/ableos/json_targets/.rustc_info.json b/ableos/json_targets/.rustc_info.json new file mode 100644 index 0000000..29caa8f --- /dev/null +++ b/ableos/json_targets/.rustc_info.json @@ -0,0 +1 @@ +{"rustc_fingerprint":3542195962280373086,"outputs":{"17598535894874457435":{"success":true,"status":"","code":0,"stdout":"rustc 1.58.0-nightly (efd048394 2021-10-20)\nbinary: rustc\ncommit-hash: efd0483949496b067cd5f7569d1b28cd3d5d3c72\ncommit-date: 2021-10-20\nhost: x86_64-unknown-linux-gnu\nrelease: 1.58.0-nightly\nLLVM version: 13.0.0\n","stderr":""},"2797684049618456168":{"success":false,"status":"exit status: 1","code":1,"stdout":"","stderr":"error: `-Csplit-debuginfo` is unstable on this platform\n\n"},"15537503139010883884":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n","stderr":""},"931469667778813386":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/elfein/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_has_atomic_equal_alignment=\"16\"\ntarget_has_atomic_equal_alignment=\"32\"\ntarget_has_atomic_equal_alignment=\"64\"\ntarget_has_atomic_equal_alignment=\"8\"\ntarget_has_atomic_equal_alignment=\"ptr\"\ntarget_has_atomic_load_store=\"16\"\ntarget_has_atomic_load_store=\"32\"\ntarget_has_atomic_load_store=\"64\"\ntarget_has_atomic_load_store=\"8\"\ntarget_has_atomic_load_store=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_thread_local\ntarget_vendor=\"unknown\"\nunix\n","stderr":""}},"successes":{}} \ No newline at end of file diff --git a/ableos/json_targets/aarch32-ableos.json b/ableos/json_targets/aarch32-ableos.json new file mode 100644 index 0000000..0fe31e6 --- /dev/null +++ b/ableos/json_targets/aarch32-ableos.json @@ -0,0 +1,15 @@ +{ + "llvm-target": "arm-none-eabihf", + "target-endian": "little", + "target-pointer-width": "32", + "target-c-int-width": "32", + "os": "ableos", + "env": "eabi", + "vendor": "unknown", + "arch": "arm", + "linker-flavor": "gcc", + "linker": "arm-none-eabi-gcc", + "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", + "executables": true, + "relocation-model": "static" +} diff --git a/ableos/json_targets/aarch64-ableos.json b/ableos/json_targets/aarch64-ableos.json new file mode 100644 index 0000000..77631b3 --- /dev/null +++ b/ableos/json_targets/aarch64-ableos.json @@ -0,0 +1,24 @@ +{ + "arch": "aarch64", + "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128", + "disable-redzone": true, + "env": "", + "executables": true, + "features": "+strict-align,+neon,+fp-armv8", + "is-builtin": false, + "linker": "rust-lld", + "linker-flavor": "ld.lld", + "linker-is-gnu": true, + "pre-link-args": { + "ld.lld": ["-Tsrc/arch/aarch64/aarch64-qemu.ld"] + }, + "llvm-target": "aarch64-unknown-none", + "max-atomic-width": 128, + "os": "none", + "panic-strategy": "abort", + "relocation-model": "static", + "target-c-int-width": "32", + "target-endian": "little", + "target-pointer-width": "64", + "vendor": "" +} diff --git a/ableos/json_targets/arm-ableos.json b/ableos/json_targets/arm-ableos.json new file mode 100644 index 0000000..0fe31e6 --- /dev/null +++ b/ableos/json_targets/arm-ableos.json @@ -0,0 +1,15 @@ +{ + "llvm-target": "arm-none-eabihf", + "target-endian": "little", + "target-pointer-width": "32", + "target-c-int-width": "32", + "os": "ableos", + "env": "eabi", + "vendor": "unknown", + "arch": "arm", + "linker-flavor": "gcc", + "linker": "arm-none-eabi-gcc", + "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", + "executables": true, + "relocation-model": "static" +} diff --git a/ableos/json_targets/x86_64-ableos.json b/ableos/json_targets/x86_64-ableos.json new file mode 100644 index 0000000..23da62b --- /dev/null +++ b/ableos/json_targets/x86_64-ableos.json @@ -0,0 +1,15 @@ +{ + "llvm-target": "x86_64-unknown-none", + "data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128", + "arch": "x86_64", + "target-endian": "little", + "target-pointer-width": "64", + "target-c-int-width": "32", + "os": "none", + "executables": true, + "linker-flavor": "ld.lld", + "linker": "rust-lld", + "panic-strategy": "abort", + "disable-redzone": true, + "features": "-mmx,-sse,+soft-float" +} diff --git a/ableos/keymaps/empty.keymap b/ableos/keymaps/empty.keymap new file mode 100644 index 0000000..996078b --- /dev/null +++ b/ableos/keymaps/empty.keymap @@ -0,0 +1,256 @@ +0- +1- +2- +3- +4- +5- +6- +7- +8- +9- +10- +11- +12- +13- +14- +15- +16- +17- +18- +19- +20- +21- +22- +23- +24- +25- +26- +27- +28- +29- +30- +31- +32- +33- +34- +35- +36- +37- +38- +39- +40- +41- +42- +43- +44- +45- +46- +47- +48- +49- +50- +51- +52- +53- +54- +55- +56- +57- +58- +59- +60- +61- +62- +63- +64- +65- +66- +67- +68- +69- +70- +71- +72- +73- +74- +75- +76- +77- +78- +79- +80- +81- +82- +83- +84- +85- +86- +87- +88- +89- +90- +91- +92- +93- +94- +95- +96- +97- +98- +99- +100- +101- +102- +103- +104- +105- +106- +107- +108- +109- +110- +111- +112- +113- +114- +115- +116- +117- +118- +119- +120- +121- +122- +123- +124- +125- +126- +127- +128- +129- +130- +131- +132- +133- +134- +135- +136- +137- +138- +139- +140- +141- +142- +143- +144- +145- +146- +147- +148- +149- +150- +151- +152- +153- +154- +155- +156- +157- +158- +159- +160- +161- +162- +163- +164- +165- +166- +167- +168- +169- +170- +171- +172- +173- +174- +175- +176- +177- +178- +179- +180- +181- +182- +183- +184- +185- +186- +187- +188- +189- +190- +191- +192- +193- +194- +195- +196- +197- +198- +199- +200- +201- +202- +203- +204- +205- +206- +207- +208- +209- +210- +211- +212- +213- +214- +215- +216- +217- +218- +219- +220- +221- +222- +223- +224- +225- +226- +227- +228- +229- +230- +231- +232- +233- +234- +235- +236- +237- +238- +239- +240- +241- +242- +243- +244- +245- +246- +247- +248- +249- +250- +251- +252- +253- +254- +255- diff --git a/ableos/keymaps/qwerty.keymap b/ableos/keymaps/qwerty.keymap new file mode 100644 index 0000000..541b6a7 --- /dev/null +++ b/ableos/keymaps/qwerty.keymap @@ -0,0 +1,252 @@ +# Able doesn't have a full keyboard +0-NONE +1- +2- +3-BACKSPACE +4- +5- +6- +7- +8- +9-TAB +10- +11- +12- +13-ENTER +14- +15- +16-SHIFT +17-CONTROL +18-ALT +19-PAUSE +20-CAPS_LOCK +21- +22- +23- +24- +25- +26- +27- +28- +29- +30- +31- +32-SPACE +33-PAGE_UP +34-PAGE_DOWN +35-END +36-HOME +37-ARROW_LEFT +38-ARROW_UP +39-ARROW_RIGHT +40-ARROW_DOWN +41- +42- +43- +44- +45-INSERT +46-DELETE +47- +48-0 +49-1 +50-2 +51-3 +52-4 +53-5 +54-6 +55-7 +56-8 +57-9 +58- +59-SEMICOLON +60- +61-EQUAL +62- +63- +64- +65-a +66-b +67-c +68-d +69-e +70-f +71-g +72-h +73-i +74-j +75-k +76-l +77-m +78-n +79-o +80-p +81-q +82-r +83-s +84-t +85-u +86-v +87-w +88-x +89- +90-z +91- +92- +93- +94- +95- +96- +97- +98- +99- +100- +101- +102- +103- +106- +107- +108- +109- +110- +111- +112-FUNCTION_1 +113-FUNCTION_2 +114-FUNCTION_3 +115-FUNCTION_4 +116-FUNCTION_5 +117-FUNCTION_6 +118-FUNCTION_7 +119-FUNCTION_8 +120-FUNCTION_9 +121-FUNCTION_10 +122-FUNCTION_11 +123-FUNCTION_12 +124- +125- +126- +127- +128- +129- +130- +131- +132- +134- +135- +136- +137- +138- +139- +140- +141- +142- +143- +145-SCROLL_LOCK +146- +147- +148- +149- +150- +151- +152- +153- +154- +155- +156- +157- +158- +159- +160- +161- +162- +163- +164- +165- +166- +167- +168- +169- +170- +171- +172- +173-MINUS +174- +175- +176- +177- +178- +179- +180- +181- +182- +183- +184- +185- +186- +187- +188-COMMA +189- +190-PERIOD +191-FORWARD_SLASH +192-GRAVE +193- +194- +195- +196- +197- +198- +199- +200- +201- +202- +203- +204- +205- +206- +207- +208- +209- +210- +211- +212- +213- +214- +215- +216- +218- +219-BRACKET_LEFT +220-BACK_SLASH +221-BRACKET_RIGHT +222-QUOTE +223- +224- +225- +226- +227- +228- +229- +230- +231- +232- +233- +234- +235- +236- +237- +238- +239- +240- +241- +242- +243- +244- +245- +246- +247- +248- +249- +250- +251- +252- +253- +254- +255- diff --git a/ableos/notes/NOTES.md b/ableos/notes/NOTES.md new file mode 100644 index 0000000..59da4d3 --- /dev/null +++ b/ableos/notes/NOTES.md @@ -0,0 +1,9 @@ +Don't keep piling on API shit +Good docs are a must!!!!!!!!!!!! +No Bloat +One thing One Way +Bloat makes M!nt sad +Have rust-like strings only + +# Don't +memory gun diff --git a/ableos/notes/USER.md b/ableos/notes/USER.md new file mode 100644 index 0000000..6e755fa --- /dev/null +++ b/ableos/notes/USER.md @@ -0,0 +1,3 @@ +user +> execute +> file system diff --git a/ableos/rust-toolchain b/ableos/rust-toolchain new file mode 100644 index 0000000..bf867e0 --- /dev/null +++ b/ableos/rust-toolchain @@ -0,0 +1 @@ +nightly diff --git a/ableos/shitty_code_to_rewrite/shutdown.rs b/ableos/shitty_code_to_rewrite/shutdown.rs new file mode 100644 index 0000000..3514d1b --- /dev/null +++ b/ableos/shitty_code_to_rewrite/shutdown.rs @@ -0,0 +1,27 @@ +#[repr(C)] +pub struct ShutterDowner { + smi_cmd: u32, + acpi_enable: u8, + acpi_disable: u8, + pm1a_cnt: u32, + pm1b_cnt: u32, + slp_typa: u16, + slp_typb: u16, + slp_en: u16, + scii_en: u16, + pm1_cnt_len: u8, +} + +pub structRSDPtr { + signature: [u8; 8], + checksum: u8, + oem_id: [u8; 6], + revision: u8, + rsdt_address: u32, +} + +struct FACP { + signature: [u8; 4], + length: u32, + +} \ No newline at end of file diff --git a/ableos/shitty_code_to_rewrite/shutdown_in_c.c b/ableos/shitty_code_to_rewrite/shutdown_in_c.c new file mode 100644 index 0000000..84fa838 --- /dev/null +++ b/ableos/shitty_code_to_rewrite/shutdown_in_c.c @@ -0,0 +1,302 @@ +// // +// // here is the slighlty complicated ACPI poweroff code +// // + +#include +#include +#include +#include +#include + +dword *SMI_CMD; +byte ACPI_ENABLE; +byte ACPI_DISABLE; +dword *PM1a_CNT; +dword *PM1b_CNT; +word SLP_TYPa; +word SLP_TYPb; +word SLP_EN; +word SCI_EN; +byte PM1_CNT_LEN; + +struct RSDPtr +{ + byte Signature[8]; + byte CheckSum; + byte OemID[6]; + byte Revision; + dword *RsdtAddress; +}; + +struct FACP +{ + byte Signature[4]; + dword Length; + byte unneded1[40 - 8]; + dword *DSDT; + byte unneded2[48 - 44]; + dword *SMI_CMD; + byte ACPI_ENABLE; + byte ACPI_DISABLE; + byte unneded3[64 - 54]; + dword *PM1a_CNT_BLK; + dword *PM1b_CNT_BLK; + byte unneded4[89 - 72]; + byte PM1_CNT_LEN; +}; + +// check if the given address has a valid header +unsigned int *acpiCheckRSDPtr(unsigned int *ptr) +{ + char *sig = "RSD PTR "; + struct RSDPtr *rsdp = (struct RSDPtr *)ptr; + byte *bptr; + byte check = 0; + int i; + + if (memcmp(sig, rsdp, 8) == 0) + { + // check checksum rsdpd + bptr = (byte *)ptr; + for (i = 0; i < sizeof(struct RSDPtr); i++) + { + check += *bptr; + bptr++; + } + + // found valid rsdpd + if (check == 0) + { + /* + if (desc->Revision == 0) + wrstr("acpi 1"); + else + wrstr("acpi 2"); + */ + return (unsigned int *)rsdp->RsdtAddress; + } + } + + return NULL; +} + +// finds the acpi header and returns the address of the rsdt +unsigned int *acpiGetRSDPtr(void) +{ + unsigned int *addr; + unsigned int *rsdp; + + // search below the 1mb mark for RSDP signature + for (addr = (unsigned int *)0x000E0000; (int)addr < 0x00100000; addr += 0x10 / sizeof(addr)) + { + rsdp = acpiCheckRSDPtr(addr); + if (rsdp != NULL) + return rsdp; + } + + // at address 0x40:0x0E is the RM segment of the ebda + int ebda = *((short *)0x40E); // get pointer + ebda = ebda * 0x10 & 0x000FFFFF; // transform segment into linear address + + // search Extended BIOS Data Area for the Root System Description Pointer signature + for (addr = (unsigned int *)ebda; (int)addr < ebda + 1024; addr += 0x10 / sizeof(addr)) + { + rsdp = acpiCheckRSDPtr(addr); + if (rsdp != NULL) + return rsdp; + } + + return NULL; +} + +// checks for a given header and validates checksum +int acpiCheckHeader(unsigned int *ptr, char *sig) +{ + if (memcmp(ptr, sig, 4) == 0) + { + char *checkPtr = (char *)ptr; + int len = *(ptr + 1); + char check = 0; + while (0 < len--) + { + check += *checkPtr; + checkPtr++; + } + if (check == 0) + return 0; + } + return -1; +} + +int acpiEnable(void) +{ + // check if acpi is enabled + if ((inw((unsigned int)PM1a_CNT) & SCI_EN) == 0) + { + // check if acpi can be enabled + if (SMI_CMD != 0 && ACPI_ENABLE != 0) + { + outb((unsigned int)SMI_CMD, ACPI_ENABLE); // send acpi enable command + // give 3 seconds time to enable acpi + int i; + for (i = 0; i < 300; i++) + { + if ((inw((unsigned int)PM1a_CNT) & SCI_EN) == 1) + break; + sleep(10); + } + if (PM1b_CNT != 0) + for (; i < 300; i++) + { + if ((inw((unsigned int)PM1b_CNT) & SCI_EN) == 1) + break; + sleep(10); + } + if (i < 300) + { + wrstr("enabled acpi.\n"); + return 0; + } + else + { + wrstr("couldn't enable acpi.\n"); + return -1; + } + } + else + { + wrstr("no known way to enable acpi.\n"); + return -1; + } + } + else + { + //wrstr("acpi was already enabled.\n"); + return 0; + } +} + +// +// bytecode of the \_S5 object +// ----------------------------------------- +// | (optional) | | | | +// NameOP | \ | _ | S | 5 | _ +// 08 | 5A | 5F | 53 | 35 | 5F +// +// ----------------------------------------------------------------------------------------------------------- +// | | | ( SLP_TYPa ) | ( SLP_TYPb ) | ( Reserved ) | (Reserved ) +// PackageOP | PkgLength | NumElements | byteprefix Num | byteprefix Num | byteprefix Num | byteprefix Num +// 12 | 0A | 04 | 0A 05 | 0A 05 | 0A 05 | 0A 05 +// +//----this-structure-was-also-seen---------------------- +// PackageOP | PkgLength | NumElements | +// 12 | 06 | 04 | 00 00 00 00 +// +// (Pkglength bit 6-7 encode additional PkgLength bytes [shouldn't be the case here]) +// +int initAcpi(void) +{ + unsigned int *ptr = acpiGetRSDPtr(); + + // check if address is correct ( if acpi is available on this pc ) + if (ptr != NULL && acpiCheckHeader(ptr, "RSDT") == 0) + { + // the RSDT contains an unknown number of pointers to acpi tables + int entrys = *(ptr + 1); + entrys = (entrys - 36) / 4; + ptr += 36 / 4; // skip header information + + while (0 < entrys--) + { + // check if the desired table is reached + if (acpiCheckHeader((unsigned int *)*ptr, "FACP") == 0) + { + entrys = -2; + struct FACP *facp = (struct FACP *)*ptr; + if (acpiCheckHeader((unsigned int *)facp->DSDT, "DSDT") == 0) + { + // search the \_S5 package in the DSDT + char *S5Addr = (char *)facp->DSDT + 36; // skip header + int dsdtLength = *(facp->DSDT + 1) - 36; + while (0 < dsdtLength--) + { + if (memcmp(S5Addr, "_S5_", 4) == 0) + break; + S5Addr++; + } + // check if \_S5 was found + if (dsdtLength > 0) + { + // check for valid AML structure + if ((*(S5Addr - 1) == 0x08 || (*(S5Addr - 2) == 0x08 && *(S5Addr - 1) == '\\')) && *(S5Addr + 4) == 0x12) + { + S5Addr += 5; + // calculate PkgLength size + S5Addr += ((*S5Addr &0xC0)>>6) +2; + + if (*S5Addr == 0x0A) + S5Addr++; // skip byteprefix + SLP_TYPa = *(S5Addr) << 10; + S5Addr++; + + if (*S5Addr == 0x0A) + S5Addr++; // skip byteprefix + SLP_TYPb = *(S5Addr) << 10; + + SMI_CMD = facp->SMI_CMD; + + ACPI_ENABLE = facp->ACPI_ENABLE; + ACPI_DISABLE = facp->ACPI_DISABLE; + + PM1a_CNT = facp->PM1a_CNT_BLK; + PM1b_CNT = facp->PM1b_CNT_BLK; + + PM1_CNT_LEN = facp->PM1_CNT_LEN; + + SLP_EN = 1 << 13; + SCI_EN = 1; + + return 0; + } + else + { + wrstr("\\_S5 parse error.\n"); + } + } + else + { + wrstr("\\_S5 not present.\n"); + } + } + else + { + wrstr("DSDT invalid.\n"); + } + } + ptr++; + } + wrstr("no valid FACP present.\n"); + } + else + { + wrstr("no acpi.\n"); + } + + return -1; +} + +void acpiPowerOff(void) +{ + // SCI_EN is set to 1 if acpi shutdown is possible + if (SCI_EN == 0) + return; + + acpiEnable(); + + // send the shutdown command + outw((unsigned int)PM1a_CNT, SLP_TYPa | SLP_EN); + if (PM1b_CNT != 0) + outw((unsigned int)PM1b_CNT, SLP_TYPb | SLP_EN); + + wrstr("acpi poweroff failed.\n"); +} diff --git a/ableos/shitty_code_to_rewrite/signal.c b/ableos/shitty_code_to_rewrite/signal.c new file mode 100644 index 0000000..9b894ac --- /dev/null +++ b/ableos/shitty_code_to_rewrite/signal.c @@ -0,0 +1,4947 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/kernel/signal.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * 1997-11-02 Modified for POSIX.1b signals by Richard Henderson + * + * 2003-06-02 Jim Houston - Concurrent Computer Corp. + * Changes to use preallocated sigqueue structures + * to allow signals to be sent reliably. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CREATE_TRACE_POINTS +#include + +#include +#include +#include +#include +#include +#include /* for syscall_get_* */ + +/* + * SLAB caches for signal bits. + */ + +static struct kmem_cache *sigqueue_cachep; + +int print_fatal_signals __read_mostly; + +static void __user *sig_handler(struct task_struct *t, int sig) +{ + return t->sighand->action[sig - 1].sa.sa_handler; +} + +static inline bool sig_handler_ignored(void __user *handler, int sig) +{ + /* Is it explicitly or implicitly ignored? */ + return handler == SIG_IGN || + (handler == SIG_DFL && sig_kernel_ignore(sig)); +} + +static bool sig_task_ignored(struct task_struct *t, int sig, bool force) +{ + void __user *handler; + + handler = sig_handler(t, sig); + + /* SIGKILL and SIGSTOP may not be sent to the global init */ + if (unlikely(is_global_init(t) && sig_kernel_only(sig))) + return true; + + if (unlikely(t->signal->flags & SIGNAL_UNKILLABLE) && + handler == SIG_DFL && !(force && sig_kernel_only(sig))) + return true; + + /* Only allow kernel generated signals to this kthread */ + if (unlikely((t->flags & PF_KTHREAD) && + (handler == SIG_KTHREAD_KERNEL) && !force)) + return true; + + return sig_handler_ignored(handler, sig); +} + +static bool sig_ignored(struct task_struct *t, int sig, bool force) +{ + /* + * Blocked signals are never ignored, since the + * signal handler may change by the time it is + * unblocked. + */ + if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig)) + return false; + + /* + * Tracers may want to know about even ignored signal unless it + * is SIGKILL which can't be reported anyway but can be ignored + * by SIGNAL_UNKILLABLE task. + */ + if (t->ptrace && sig != SIGKILL) + return false; + + return sig_task_ignored(t, sig, force); +} + +/* + * Re-calculate pending state from the set of locally pending + * signals, globally pending signals, and blocked signals. + */ +static inline bool has_pending_signals(sigset_t *signal, sigset_t *blocked) +{ + unsigned long ready; + long i; + + switch (_NSIG_WORDS) + { + default: + for (i = _NSIG_WORDS, ready = 0; --i >= 0;) + ready |= signal->sig[i] & ~blocked->sig[i]; + break; + + case 4: + ready = signal->sig[3] & ~blocked->sig[3]; + ready |= signal->sig[2] & ~blocked->sig[2]; + ready |= signal->sig[1] & ~blocked->sig[1]; + ready |= signal->sig[0] & ~blocked->sig[0]; + break; + + case 2: + ready = signal->sig[1] & ~blocked->sig[1]; + ready |= signal->sig[0] & ~blocked->sig[0]; + break; + + case 1: + ready = signal->sig[0] & ~blocked->sig[0]; + } + return ready != 0; +} + +#define PENDING(p, b) has_pending_signals(&(p)->signal, (b)) + +static bool recalc_sigpending_tsk(struct task_struct *t) +{ + if ((t->jobctl & (JOBCTL_PENDING_MASK | JOBCTL_TRAP_FREEZE)) || + PENDING(&t->pending, &t->blocked) || + PENDING(&t->signal->shared_pending, &t->blocked) || + cgroup_task_frozen(t)) + { + set_tsk_thread_flag(t, TIF_SIGPENDING); + return true; + } + + /* + * We must never clear the flag in another thread, or in current + * when it's possible the current syscall is returning -ERESTART*. + * So we don't clear it here, and only callers who know they should do. + */ + return false; +} + +/* + * After recalculating TIF_SIGPENDING, we need to make sure the task wakes up. + * This is superfluous when called on current, the wakeup is a harmless no-op. + */ +void recalc_sigpending_and_wake(struct task_struct *t) +{ + if (recalc_sigpending_tsk(t)) + signal_wake_up(t, 0); +} + +void recalc_sigpending(void) +{ + if (!recalc_sigpending_tsk(current) && !freezing(current)) + clear_thread_flag(TIF_SIGPENDING); +} +EXPORT_SYMBOL(recalc_sigpending); + +void calculate_sigpending(void) +{ + /* Have any signals or users of TIF_SIGPENDING been delayed + * until after fork? + */ + spin_lock_irq(¤t->sighand->siglock); + set_tsk_thread_flag(current, TIF_SIGPENDING); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); +} + +/* Given the mask, find the first available signal that should be serviced. */ + +#define SYNCHRONOUS_MASK \ + (sigmask(SIGSEGV) | sigmask(SIGBUS) | sigmask(SIGILL) | \ + sigmask(SIGTRAP) | sigmask(SIGFPE) | sigmask(SIGSYS)) + +int next_signal(struct sigpending *pending, sigset_t *mask) +{ + unsigned long i, *s, *m, x; + int sig = 0; + + s = pending->signal.sig; + m = mask->sig; + + /* + * Handle the first word specially: it contains the + * synchronous signals that need to be dequeued first. + */ + x = *s & ~*m; + if (x) + { + if (x & SYNCHRONOUS_MASK) + x &= SYNCHRONOUS_MASK; + sig = ffz(~x) + 1; + return sig; + } + + switch (_NSIG_WORDS) + { + default: + for (i = 1; i < _NSIG_WORDS; ++i) + { + x = *++s & ~*++m; + if (!x) + continue; + sig = ffz(~x) + i * _NSIG_BPW + 1; + break; + } + break; + + case 2: + x = s[1] & ~m[1]; + if (!x) + break; + sig = ffz(~x) + _NSIG_BPW + 1; + break; + + case 1: + /* Nothing to do */ + break; + } + + return sig; +} + +static inline void print_dropped_signal(int sig) +{ + static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10); + + if (!print_fatal_signals) + return; + + if (!__ratelimit(&ratelimit_state)) + return; + + pr_info("%s/%d: reached RLIMIT_SIGPENDING, dropped signal %d\n", + current->comm, current->pid, sig); +} + +/** + * task_set_jobctl_pending - set jobctl pending bits + * @task: target task + * @mask: pending bits to set + * + * Clear @mask from @task->jobctl. @mask must be subset of + * %JOBCTL_PENDING_MASK | %JOBCTL_STOP_CONSUME | %JOBCTL_STOP_SIGMASK | + * %JOBCTL_TRAPPING. If stop signo is being set, the existing signo is + * cleared. If @task is already being killed or exiting, this function + * becomes noop. + * + * CONTEXT: + * Must be called with @task->sighand->siglock held. + * + * RETURNS: + * %true if @mask is set, %false if made noop because @task was dying. + */ +bool task_set_jobctl_pending(struct task_struct *task, unsigned long mask) +{ + BUG_ON(mask & ~(JOBCTL_PENDING_MASK | JOBCTL_STOP_CONSUME | + JOBCTL_STOP_SIGMASK | JOBCTL_TRAPPING)); + BUG_ON((mask & JOBCTL_TRAPPING) && !(mask & JOBCTL_PENDING_MASK)); + + if (unlikely(fatal_signal_pending(task) || (task->flags & PF_EXITING))) + return false; + + if (mask & JOBCTL_STOP_SIGMASK) + task->jobctl &= ~JOBCTL_STOP_SIGMASK; + + task->jobctl |= mask; + return true; +} + +/** + * task_clear_jobctl_trapping - clear jobctl trapping bit + * @task: target task + * + * If JOBCTL_TRAPPING is set, a ptracer is waiting for us to enter TRACED. + * Clear it and wake up the ptracer. Note that we don't need any further + * locking. @task->siglock guarantees that @task->parent points to the + * ptracer. + * + * CONTEXT: + * Must be called with @task->sighand->siglock held. + */ +void task_clear_jobctl_trapping(struct task_struct *task) +{ + if (unlikely(task->jobctl & JOBCTL_TRAPPING)) + { + task->jobctl &= ~JOBCTL_TRAPPING; + smp_mb(); /* advised by wake_up_bit() */ + wake_up_bit(&task->jobctl, JOBCTL_TRAPPING_BIT); + } +} + +/** + * task_clear_jobctl_pending - clear jobctl pending bits + * @task: target task + * @mask: pending bits to clear + * + * Clear @mask from @task->jobctl. @mask must be subset of + * %JOBCTL_PENDING_MASK. If %JOBCTL_STOP_PENDING is being cleared, other + * STOP bits are cleared together. + * + * If clearing of @mask leaves no stop or trap pending, this function calls + * task_clear_jobctl_trapping(). + * + * CONTEXT: + * Must be called with @task->sighand->siglock held. + */ +void task_clear_jobctl_pending(struct task_struct *task, unsigned long mask) +{ + BUG_ON(mask & ~JOBCTL_PENDING_MASK); + + if (mask & JOBCTL_STOP_PENDING) + mask |= JOBCTL_STOP_CONSUME | JOBCTL_STOP_DEQUEUED; + + task->jobctl &= ~mask; + + if (!(task->jobctl & JOBCTL_PENDING_MASK)) + task_clear_jobctl_trapping(task); +} + +/** + * task_participate_group_stop - participate in a group stop + * @task: task participating in a group stop + * + * @task has %JOBCTL_STOP_PENDING set and is participating in a group stop. + * Group stop states are cleared and the group stop count is consumed if + * %JOBCTL_STOP_CONSUME was set. If the consumption completes the group + * stop, the appropriate `SIGNAL_*` flags are set. + * + * CONTEXT: + * Must be called with @task->sighand->siglock held. + * + * RETURNS: + * %true if group stop completion should be notified to the parent, %false + * otherwise. + */ +static bool task_participate_group_stop(struct task_struct *task) +{ + struct signal_struct *sig = task->signal; + bool consume = task->jobctl & JOBCTL_STOP_CONSUME; + + WARN_ON_ONCE(!(task->jobctl & JOBCTL_STOP_PENDING)); + + task_clear_jobctl_pending(task, JOBCTL_STOP_PENDING); + + if (!consume) + return false; + + if (!WARN_ON_ONCE(sig->group_stop_count == 0)) + sig->group_stop_count--; + + /* + * Tell the caller to notify completion iff we are entering into a + * fresh group stop. Read comment in do_signal_stop() for details. + */ + if (!sig->group_stop_count && !(sig->flags & SIGNAL_STOP_STOPPED)) + { + signal_set_stop_flags(sig, SIGNAL_STOP_STOPPED); + return true; + } + return false; +} + +void task_join_group_stop(struct task_struct *task) +{ + unsigned long mask = current->jobctl & JOBCTL_STOP_SIGMASK; + struct signal_struct *sig = current->signal; + + if (sig->group_stop_count) + { + sig->group_stop_count++; + mask |= JOBCTL_STOP_CONSUME; + } + else if (!(sig->flags & SIGNAL_STOP_STOPPED)) + return; + + /* Have the new thread join an on-going signal group stop */ + task_set_jobctl_pending(task, mask | JOBCTL_STOP_PENDING); +} + +/* + * allocate a new signal queue record + * - this may be called without locks if and only if t == current, otherwise an + * appropriate lock must be held to stop the target task from exiting + */ +static struct sigqueue * +__sigqueue_alloc(int sig, struct task_struct *t, gfp_t gfp_flags, + int override_rlimit, const unsigned int sigqueue_flags) +{ + struct sigqueue *q = NULL; + struct ucounts *ucounts = NULL; + long sigpending; + + /* + * Protect access to @t credentials. This can go away when all + * callers hold rcu read lock. + * + * NOTE! A pending signal will hold on to the user refcount, + * and we get/put the refcount only when the sigpending count + * changes from/to zero. + */ + rcu_read_lock(); + ucounts = task_ucounts(t); + sigpending = inc_rlimit_get_ucounts(ucounts, UCOUNT_RLIMIT_SIGPENDING); + rcu_read_unlock(); + if (!sigpending) + return NULL; + + if (override_rlimit || likely(sigpending <= task_rlimit(t, RLIMIT_SIGPENDING))) + { + q = kmem_cache_alloc(sigqueue_cachep, gfp_flags); + } + else + { + print_dropped_signal(sig); + } + + if (unlikely(q == NULL)) + { + dec_rlimit_put_ucounts(ucounts, UCOUNT_RLIMIT_SIGPENDING); + } + else + { + INIT_LIST_HEAD(&q->list); + q->flags = sigqueue_flags; + q->ucounts = ucounts; + } + return q; +} + +static void __sigqueue_free(struct sigqueue *q) +{ + if (q->flags & SIGQUEUE_PREALLOC) + return; + if (q->ucounts) + { + dec_rlimit_put_ucounts(q->ucounts, UCOUNT_RLIMIT_SIGPENDING); + q->ucounts = NULL; + } + kmem_cache_free(sigqueue_cachep, q); +} + +void flush_sigqueue(struct sigpending *queue) +{ + struct sigqueue *q; + + sigemptyset(&queue->signal); + while (!list_empty(&queue->list)) + { + q = list_entry(queue->list.next, struct sigqueue, list); + list_del_init(&q->list); + __sigqueue_free(q); + } +} + +/* + * Flush all pending signals for this kthread. + */ +void flush_signals(struct task_struct *t) +{ + unsigned long flags; + + spin_lock_irqsave(&t->sighand->siglock, flags); + clear_tsk_thread_flag(t, TIF_SIGPENDING); + flush_sigqueue(&t->pending); + flush_sigqueue(&t->signal->shared_pending); + spin_unlock_irqrestore(&t->sighand->siglock, flags); +} +EXPORT_SYMBOL(flush_signals); + +#ifdef CONFIG_POSIX_TIMERS +static void __flush_itimer_signals(struct sigpending *pending) +{ + sigset_t signal, retain; + struct sigqueue *q, *n; + + signal = pending->signal; + sigemptyset(&retain); + + list_for_each_entry_safe(q, n, &pending->list, list) + { + int sig = q->info.si_signo; + + if (likely(q->info.si_code != SI_TIMER)) + { + sigaddset(&retain, sig); + } + else + { + sigdelset(&signal, sig); + list_del_init(&q->list); + __sigqueue_free(q); + } + } + + sigorsets(&pending->signal, &signal, &retain); +} + +void flush_itimer_signals(void) +{ + struct task_struct *tsk = current; + unsigned long flags; + + spin_lock_irqsave(&tsk->sighand->siglock, flags); + __flush_itimer_signals(&tsk->pending); + __flush_itimer_signals(&tsk->signal->shared_pending); + spin_unlock_irqrestore(&tsk->sighand->siglock, flags); +} +#endif + +void ignore_signals(struct task_struct *t) +{ + int i; + + for (i = 0; i < _NSIG; ++i) + t->sighand->action[i].sa.sa_handler = SIG_IGN; + + flush_signals(t); +} + +/* + * Flush all handlers for a task. + */ + +void flush_signal_handlers(struct task_struct *t, int force_default) +{ + int i; + struct k_sigaction *ka = &t->sighand->action[0]; + for (i = _NSIG; i != 0; i--) + { + if (force_default || ka->sa.sa_handler != SIG_IGN) + ka->sa.sa_handler = SIG_DFL; + ka->sa.sa_flags = 0; +#ifdef __ARCH_HAS_SA_RESTORER + ka->sa.sa_restorer = NULL; +#endif + sigemptyset(&ka->sa.sa_mask); + ka++; + } +} + +bool unhandled_signal(struct task_struct *tsk, int sig) +{ + void __user *handler = tsk->sighand->action[sig - 1].sa.sa_handler; + if (is_global_init(tsk)) + return true; + + if (handler != SIG_IGN && handler != SIG_DFL) + return false; + + /* if ptraced, let the tracer determine */ + return !tsk->ptrace; +} + +static void collect_signal(int sig, struct sigpending *list, kernel_siginfo_t *info, + bool *resched_timer) +{ + struct sigqueue *q, *first = NULL; + + /* + * Collect the siginfo appropriate to this signal. Check if + * there is another siginfo for the same signal. + */ + list_for_each_entry(q, &list->list, list) + { + if (q->info.si_signo == sig) + { + if (first) + goto still_pending; + first = q; + } + } + + sigdelset(&list->signal, sig); + + if (first) + { + still_pending: + list_del_init(&first->list); + copy_siginfo(info, &first->info); + + *resched_timer = + (first->flags & SIGQUEUE_PREALLOC) && + (info->si_code == SI_TIMER) && + (info->si_sys_private); + + __sigqueue_free(first); + } + else + { + /* + * Ok, it wasn't in the queue. This must be + * a fast-pathed signal or we must have been + * out of queue space. So zero out the info. + */ + clear_siginfo(info); + info->si_signo = sig; + info->si_errno = 0; + info->si_code = SI_USER; + info->si_pid = 0; + info->si_uid = 0; + } +} + +static int __dequeue_signal(struct sigpending *pending, sigset_t *mask, + kernel_siginfo_t *info, bool *resched_timer) +{ + int sig = next_signal(pending, mask); + + if (sig) + collect_signal(sig, pending, info, resched_timer); + return sig; +} + +/* + * Dequeue a signal and return the element to the caller, which is + * expected to free it. + * + * All callers have to hold the siglock. + */ +int dequeue_signal(struct task_struct *tsk, sigset_t *mask, kernel_siginfo_t *info) +{ + bool resched_timer = false; + int signr; + + /* We only dequeue private signals from ourselves, we don't let + * signalfd steal them + */ + signr = __dequeue_signal(&tsk->pending, mask, info, &resched_timer); + if (!signr) + { + signr = __dequeue_signal(&tsk->signal->shared_pending, + mask, info, &resched_timer); +#ifdef CONFIG_POSIX_TIMERS + /* + * itimer signal ? + * + * itimers are process shared and we restart periodic + * itimers in the signal delivery path to prevent DoS + * attacks in the high resolution timer case. This is + * compliant with the old way of self-restarting + * itimers, as the SIGALRM is a legacy signal and only + * queued once. Changing the restart behaviour to + * restart the timer in the signal dequeue path is + * reducing the timer noise on heavy loaded !highres + * systems too. + */ + if (unlikely(signr == SIGALRM)) + { + struct hrtimer *tmr = &tsk->signal->real_timer; + + if (!hrtimer_is_queued(tmr) && + tsk->signal->it_real_incr != 0) + { + hrtimer_forward(tmr, tmr->base->get_time(), + tsk->signal->it_real_incr); + hrtimer_restart(tmr); + } + } +#endif + } + + recalc_sigpending(); + if (!signr) + return 0; + + if (unlikely(sig_kernel_stop(signr))) + { + /* + * Set a marker that we have dequeued a stop signal. Our + * caller might release the siglock and then the pending + * stop signal it is about to process is no longer in the + * pending bitmasks, but must still be cleared by a SIGCONT + * (and overruled by a SIGKILL). So those cases clear this + * shared flag after we've set it. Note that this flag may + * remain set after the signal we return is ignored or + * handled. That doesn't matter because its only purpose + * is to alert stop-signal processing code when another + * processor has come along and cleared the flag. + */ + current->jobctl |= JOBCTL_STOP_DEQUEUED; + } +#ifdef CONFIG_POSIX_TIMERS + if (resched_timer) + { + /* + * Release the siglock to ensure proper locking order + * of timer locks outside of siglocks. Note, we leave + * irqs disabled here, since the posix-timers code is + * about to disable them again anyway. + */ + spin_unlock(&tsk->sighand->siglock); + posixtimer_rearm(info); + spin_lock(&tsk->sighand->siglock); + + /* Don't expose the si_sys_private value to userspace */ + info->si_sys_private = 0; + } +#endif + return signr; +} +EXPORT_SYMBOL_GPL(dequeue_signal); + +static int dequeue_synchronous_signal(kernel_siginfo_t *info) +{ + struct task_struct *tsk = current; + struct sigpending *pending = &tsk->pending; + struct sigqueue *q, *sync = NULL; + + /* + * Might a synchronous signal be in the queue? + */ + if (!((pending->signal.sig[0] & ~tsk->blocked.sig[0]) & SYNCHRONOUS_MASK)) + return 0; + + /* + * Return the first synchronous signal in the queue. + */ + list_for_each_entry(q, &pending->list, list) + { + /* Synchronous signals have a positive si_code */ + if ((q->info.si_code > SI_USER) && + (sigmask(q->info.si_signo) & SYNCHRONOUS_MASK)) + { + sync = q; + goto next; + } + } + return 0; +next: + /* + * Check if there is another siginfo for the same signal. + */ + list_for_each_entry_continue(q, &pending->list, list) + { + if (q->info.si_signo == sync->info.si_signo) + goto still_pending; + } + + sigdelset(&pending->signal, sync->info.si_signo); + recalc_sigpending(); +still_pending: + list_del_init(&sync->list); + copy_siginfo(info, &sync->info); + __sigqueue_free(sync); + return info->si_signo; +} + +/* + * Tell a process that it has a new active signal.. + * + * NOTE! we rely on the previous spin_lock to + * lock interrupts for us! We can only be called with + * "siglock" held, and the local interrupt must + * have been disabled when that got acquired! + * + * No need to set need_resched since signal event passing + * goes through ->blocked + */ +void signal_wake_up_state(struct task_struct *t, unsigned int state) +{ + set_tsk_thread_flag(t, TIF_SIGPENDING); + /* + * TASK_WAKEKILL also means wake it up in the stopped/traced/killable + * case. We don't check t->state here because there is a race with it + * executing another processor and just now entering stopped state. + * By using wake_up_state, we ensure the process will wake up and + * handle its death signal. + */ + if (!wake_up_state(t, state | TASK_INTERRUPTIBLE)) + kick_process(t); +} + +/* + * Remove signals in mask from the pending set and queue. + * Returns 1 if any signals were found. + * + * All callers must be holding the siglock. + */ +static void flush_sigqueue_mask(sigset_t *mask, struct sigpending *s) +{ + struct sigqueue *q, *n; + sigset_t m; + + sigandsets(&m, mask, &s->signal); + if (sigisemptyset(&m)) + return; + + sigandnsets(&s->signal, &s->signal, mask); + list_for_each_entry_safe(q, n, &s->list, list) + { + if (sigismember(mask, q->info.si_signo)) + { + list_del_init(&q->list); + __sigqueue_free(q); + } + } +} + +static inline int is_si_special(const struct kernel_siginfo *info) +{ + return info <= SEND_SIG_PRIV; +} + +static inline bool si_fromuser(const struct kernel_siginfo *info) +{ + return info == SEND_SIG_NOINFO || + (!is_si_special(info) && SI_FROMUSER(info)); +} + +/* + * called with RCU read lock from check_kill_permission() + */ +static bool kill_ok_by_cred(struct task_struct *t) +{ + const struct cred *cred = current_cred(); + const struct cred *tcred = __task_cred(t); + + return uid_eq(cred->euid, tcred->suid) || + uid_eq(cred->euid, tcred->uid) || + uid_eq(cred->uid, tcred->suid) || + uid_eq(cred->uid, tcred->uid) || + ns_capable(tcred->user_ns, CAP_KILL); +} + +/* + * Bad permissions for sending the signal + * - the caller must hold the RCU read lock + */ +static int check_kill_permission(int sig, struct kernel_siginfo *info, + struct task_struct *t) +{ + struct pid *sid; + int error; + + if (!valid_signal(sig)) + return -EINVAL; + + if (!si_fromuser(info)) + return 0; + + error = audit_signal_info(sig, t); /* Let audit system see the signal */ + if (error) + return error; + + if (!same_thread_group(current, t) && + !kill_ok_by_cred(t)) + { + switch (sig) + { + case SIGCONT: + sid = task_session(t); + /* + * We don't return the error if sid == NULL. The + * task was unhashed, the caller must notice this. + */ + if (!sid || sid == task_session(current)) + break; + fallthrough; + default: + return -EPERM; + } + } + + return security_task_kill(t, info, sig, NULL); +} + +/** + * ptrace_trap_notify - schedule trap to notify ptracer + * @t: tracee wanting to notify tracer + * + * This function schedules sticky ptrace trap which is cleared on the next + * TRAP_STOP to notify ptracer of an event. @t must have been seized by + * ptracer. + * + * If @t is running, STOP trap will be taken. If trapped for STOP and + * ptracer is listening for events, tracee is woken up so that it can + * re-trap for the new event. If trapped otherwise, STOP trap will be + * eventually taken without returning to userland after the existing traps + * are finished by PTRACE_CONT. + * + * CONTEXT: + * Must be called with @task->sighand->siglock held. + */ +static void ptrace_trap_notify(struct task_struct *t) +{ + WARN_ON_ONCE(!(t->ptrace & PT_SEIZED)); + assert_spin_locked(&t->sighand->siglock); + + task_set_jobctl_pending(t, JOBCTL_TRAP_NOTIFY); + ptrace_signal_wake_up(t, t->jobctl & JOBCTL_LISTENING); +} + +/* + * Handle magic process-wide effects of stop/continue signals. Unlike + * the signal actions, these happen immediately at signal-generation + * time regardless of blocking, ignoring, or handling. This does the + * actual continuing for SIGCONT, but not the actual stopping for stop + * signals. The process stop is done as a signal action for SIG_DFL. + * + * Returns true if the signal should be actually delivered, otherwise + * it should be dropped. + */ +static bool prepare_signal(int sig, struct task_struct *p, bool force) +{ + struct signal_struct *signal = p->signal; + struct task_struct *t; + sigset_t flush; + + if (signal->flags & (SIGNAL_GROUP_EXIT | SIGNAL_GROUP_COREDUMP)) + { + if (!(signal->flags & SIGNAL_GROUP_EXIT)) + return sig == SIGKILL; + /* + * The process is in the middle of dying, nothing to do. + */ + } + else if (sig_kernel_stop(sig)) + { + /* + * This is a stop signal. Remove SIGCONT from all queues. + */ + siginitset(&flush, sigmask(SIGCONT)); + flush_sigqueue_mask(&flush, &signal->shared_pending); + for_each_thread(p, t) + flush_sigqueue_mask(&flush, &t->pending); + } + else if (sig == SIGCONT) + { + unsigned int why; + /* + * Remove all stop signals from all queues, wake all threads. + */ + siginitset(&flush, SIG_KERNEL_STOP_MASK); + flush_sigqueue_mask(&flush, &signal->shared_pending); + for_each_thread(p, t) + { + flush_sigqueue_mask(&flush, &t->pending); + task_clear_jobctl_pending(t, JOBCTL_STOP_PENDING); + if (likely(!(t->ptrace & PT_SEIZED))) + wake_up_state(t, __TASK_STOPPED); + else + ptrace_trap_notify(t); + } + + /* + * Notify the parent with CLD_CONTINUED if we were stopped. + * + * If we were in the middle of a group stop, we pretend it + * was already finished, and then continued. Since SIGCHLD + * doesn't queue we report only CLD_STOPPED, as if the next + * CLD_CONTINUED was dropped. + */ + why = 0; + if (signal->flags & SIGNAL_STOP_STOPPED) + why |= SIGNAL_CLD_CONTINUED; + else if (signal->group_stop_count) + why |= SIGNAL_CLD_STOPPED; + + if (why) + { + /* + * The first thread which returns from do_signal_stop() + * will take ->siglock, notice SIGNAL_CLD_MASK, and + * notify its parent. See get_signal(). + */ + signal_set_stop_flags(signal, why | SIGNAL_STOP_CONTINUED); + signal->group_stop_count = 0; + signal->group_exit_code = 0; + } + } + + return !sig_ignored(p, sig, force); +} + +/* + * Test if P wants to take SIG. After we've checked all threads with this, + * it's equivalent to finding no threads not blocking SIG. Any threads not + * blocking SIG were ruled out because they are not running and already + * have pending signals. Such threads will dequeue from the shared queue + * as soon as they're available, so putting the signal on the shared queue + * will be equivalent to sending it to one such thread. + */ +static inline bool wants_signal(int sig, struct task_struct *p) +{ + if (sigismember(&p->blocked, sig)) + return false; + + if (p->flags & PF_EXITING) + return false; + + if (sig == SIGKILL) + return true; + + if (task_is_stopped_or_traced(p)) + return false; + + return task_curr(p) || !task_sigpending(p); +} + +static void complete_signal(int sig, struct task_struct *p, enum pid_type type) +{ + struct signal_struct *signal = p->signal; + struct task_struct *t; + + /* + * Now find a thread we can wake up to take the signal off the queue. + * + * If the main thread wants the signal, it gets first crack. + * Probably the least surprising to the average bear. + */ + if (wants_signal(sig, p)) + t = p; + else if ((type == PIDTYPE_PID) || thread_group_empty(p)) + /* + * There is just one thread and it does not need to be woken. + * It will dequeue unblocked signals before it runs again. + */ + return; + else + { + /* + * Otherwise try to find a suitable thread. + */ + t = signal->curr_target; + while (!wants_signal(sig, t)) + { + t = next_thread(t); + if (t == signal->curr_target) + /* + * No thread needs to be woken. + * Any eligible threads will see + * the signal in the queue soon. + */ + return; + } + signal->curr_target = t; + } + + /* + * Found a killable thread. If the signal will be fatal, + * then start taking the whole group down immediately. + */ + if (sig_fatal(p, sig) && + !(signal->flags & SIGNAL_GROUP_EXIT) && + !sigismember(&t->real_blocked, sig) && + (sig == SIGKILL || !p->ptrace)) + { + /* + * This signal will be fatal to the whole group. + */ + if (!sig_kernel_coredump(sig)) + { + /* + * Start a group exit and wake everybody up. + * This way we don't have other threads + * running and doing things after a slower + * thread has the fatal signal pending. + */ + signal->flags = SIGNAL_GROUP_EXIT; + signal->group_exit_code = sig; + signal->group_stop_count = 0; + t = p; + do + { + task_clear_jobctl_pending(t, JOBCTL_PENDING_MASK); + sigaddset(&t->pending.signal, SIGKILL); + signal_wake_up(t, 1); + } + while_each_thread(p, t); + return; + } + } + + /* + * The signal is already in the shared-pending queue. + * Tell the chosen thread to wake up and dequeue it. + */ + signal_wake_up(t, sig == SIGKILL); + return; +} + +static inline bool legacy_queue(struct sigpending *signals, int sig) +{ + return (sig < SIGRTMIN) && sigismember(&signals->signal, sig); +} + +static int __send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, + enum pid_type type, bool force) +{ + struct sigpending *pending; + struct sigqueue *q; + int override_rlimit; + int ret = 0, result; + + assert_spin_locked(&t->sighand->siglock); + + result = TRACE_SIGNAL_IGNORED; + if (!prepare_signal(sig, t, force)) + goto ret; + + pending = (type != PIDTYPE_PID) ? &t->signal->shared_pending : &t->pending; + /* + * Short-circuit ignored signals and support queuing + * exactly one non-rt signal, so that we can get more + * detailed information about the cause of the signal. + */ + result = TRACE_SIGNAL_ALREADY_PENDING; + if (legacy_queue(pending, sig)) + goto ret; + + result = TRACE_SIGNAL_DELIVERED; + /* + * Skip useless siginfo allocation for SIGKILL and kernel threads. + */ + if ((sig == SIGKILL) || (t->flags & PF_KTHREAD)) + goto out_set; + + /* + * Real-time signals must be queued if sent by sigqueue, or + * some other real-time mechanism. It is implementation + * defined whether kill() does so. We attempt to do so, on + * the principle of least surprise, but since kill is not + * allowed to fail with EAGAIN when low on memory we just + * make sure at least one signal gets delivered and don't + * pass on the info struct. + */ + if (sig < SIGRTMIN) + override_rlimit = (is_si_special(info) || info->si_code >= 0); + else + override_rlimit = 0; + + q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit, 0); + + if (q) + { + list_add_tail(&q->list, &pending->list); + switch ((unsigned long)info) + { + case (unsigned long)SEND_SIG_NOINFO: + clear_siginfo(&q->info); + q->info.si_signo = sig; + q->info.si_errno = 0; + q->info.si_code = SI_USER; + q->info.si_pid = task_tgid_nr_ns(current, + task_active_pid_ns(t)); + rcu_read_lock(); + q->info.si_uid = + from_kuid_munged(task_cred_xxx(t, user_ns), + current_uid()); + rcu_read_unlock(); + break; + case (unsigned long)SEND_SIG_PRIV: + clear_siginfo(&q->info); + q->info.si_signo = sig; + q->info.si_errno = 0; + q->info.si_code = SI_KERNEL; + q->info.si_pid = 0; + q->info.si_uid = 0; + break; + default: + copy_siginfo(&q->info, info); + break; + } + } + else if (!is_si_special(info) && + sig >= SIGRTMIN && info->si_code != SI_USER) + { + /* + * Queue overflow, abort. We may abort if the + * signal was rt and sent by user using something + * other than kill(). + */ + result = TRACE_SIGNAL_OVERFLOW_FAIL; + ret = -EAGAIN; + goto ret; + } + else + { + /* + * This is a silent loss of information. We still + * send the signal, but the *info bits are lost. + */ + result = TRACE_SIGNAL_LOSE_INFO; + } + +out_set: + signalfd_notify(t, sig); + sigaddset(&pending->signal, sig); + + /* Let multiprocess signals appear after on-going forks */ + if (type > PIDTYPE_TGID) + { + struct multiprocess_signals *delayed; + hlist_for_each_entry(delayed, &t->signal->multiprocess, node) + { + sigset_t *signal = &delayed->signal; + /* Can't queue both a stop and a continue signal */ + if (sig == SIGCONT) + sigdelsetmask(signal, SIG_KERNEL_STOP_MASK); + else if (sig_kernel_stop(sig)) + sigdelset(signal, SIGCONT); + sigaddset(signal, sig); + } + } + + complete_signal(sig, t, type); +ret: + trace_signal_generate(sig, info, t, type != PIDTYPE_PID, result); + return ret; +} + +static inline bool has_si_pid_and_uid(struct kernel_siginfo *info) +{ + bool ret = false; + switch (siginfo_layout(info->si_signo, info->si_code)) + { + case SIL_KILL: + case SIL_CHLD: + case SIL_RT: + ret = true; + break; + case SIL_TIMER: + case SIL_POLL: + case SIL_FAULT: + case SIL_FAULT_TRAPNO: + case SIL_FAULT_MCEERR: + case SIL_FAULT_BNDERR: + case SIL_FAULT_PKUERR: + case SIL_FAULT_PERF_EVENT: + case SIL_SYS: + ret = false; + break; + } + return ret; +} + +static int send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, + enum pid_type type) +{ + /* Should SIGKILL or SIGSTOP be received by a pid namespace init? */ + bool force = false; + + if (info == SEND_SIG_NOINFO) + { + /* Force if sent from an ancestor pid namespace */ + force = !task_pid_nr_ns(current, task_active_pid_ns(t)); + } + else if (info == SEND_SIG_PRIV) + { + /* Don't ignore kernel generated signals */ + force = true; + } + else if (has_si_pid_and_uid(info)) + { + /* SIGKILL and SIGSTOP is special or has ids */ + struct user_namespace *t_user_ns; + + rcu_read_lock(); + t_user_ns = task_cred_xxx(t, user_ns); + if (current_user_ns() != t_user_ns) + { + kuid_t uid = make_kuid(current_user_ns(), info->si_uid); + info->si_uid = from_kuid_munged(t_user_ns, uid); + } + rcu_read_unlock(); + + /* A kernel generated signal? */ + force = (info->si_code == SI_KERNEL); + + /* From an ancestor pid namespace? */ + if (!task_pid_nr_ns(current, task_active_pid_ns(t))) + { + info->si_pid = 0; + force = true; + } + } + return __send_signal(sig, info, t, type, force); +} + +static void print_fatal_signal(int signr) +{ + struct pt_regs *regs = signal_pt_regs(); + pr_info("potentially unexpected fatal signal %d.\n", signr); + +#if defined(__i386__) && !defined(__arch_um__) + pr_info("code at %08lx: ", regs->ip); + { + int i; + for (i = 0; i < 16; i++) + { + unsigned char insn; + + if (get_user(insn, (unsigned char *)(regs->ip + i))) + break; + pr_cont("%02x ", insn); + } + } + pr_cont("\n"); +#endif + preempt_disable(); + show_regs(regs); + preempt_enable(); +} + +static int __init setup_print_fatal_signals(char *str) +{ + get_option(&str, &print_fatal_signals); + + return 1; +} + +__setup("print-fatal-signals=", setup_print_fatal_signals); + +int __group_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) +{ + return send_signal(sig, info, p, PIDTYPE_TGID); +} + +int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p, + enum pid_type type) +{ + unsigned long flags; + int ret = -ESRCH; + + if (lock_task_sighand(p, &flags)) + { + ret = send_signal(sig, info, p, type); + unlock_task_sighand(p, &flags); + } + + return ret; +} + +/* + * Force a signal that the process can't ignore: if necessary + * we unblock the signal and change any SIG_IGN to SIG_DFL. + * + * Note: If we unblock the signal, we always reset it to SIG_DFL, + * since we do not want to have a signal handler that was blocked + * be invoked when user space had explicitly blocked it. + * + * We don't want to have recursive SIGSEGV's etc, for example, + * that is why we also clear SIGNAL_UNKILLABLE. + */ +static int +force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t, bool sigdfl) +{ + unsigned long int flags; + int ret, blocked, ignored; + struct k_sigaction *action; + int sig = info->si_signo; + + spin_lock_irqsave(&t->sighand->siglock, flags); + action = &t->sighand->action[sig - 1]; + ignored = action->sa.sa_handler == SIG_IGN; + blocked = sigismember(&t->blocked, sig); + if (blocked || ignored || sigdfl) + { + action->sa.sa_handler = SIG_DFL; + action->sa.sa_flags |= SA_IMMUTABLE; + if (blocked) + { + sigdelset(&t->blocked, sig); + recalc_sigpending_and_wake(t); + } + } + /* + * Don't clear SIGNAL_UNKILLABLE for traced tasks, users won't expect + * debugging to leave init killable. + */ + if (action->sa.sa_handler == SIG_DFL && !t->ptrace) + t->signal->flags &= ~SIGNAL_UNKILLABLE; + ret = send_signal(sig, info, t, PIDTYPE_PID); + spin_unlock_irqrestore(&t->sighand->siglock, flags); + + return ret; +} + +int force_sig_info(struct kernel_siginfo *info) +{ + return force_sig_info_to_task(info, current, false); +} + +/* + * Nuke all other threads in the group. + */ +int zap_other_threads(struct task_struct *p) +{ + struct task_struct *t = p; + int count = 0; + + p->signal->group_stop_count = 0; + + while_each_thread(p, t) + { + task_clear_jobctl_pending(t, JOBCTL_PENDING_MASK); + count++; + + /* Don't bother with already dead threads */ + if (t->exit_state) + continue; + sigaddset(&t->pending.signal, SIGKILL); + signal_wake_up(t, 1); + } + + return count; +} + +struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, + unsigned long *flags) +{ + struct sighand_struct *sighand; + + rcu_read_lock(); + for (;;) + { + sighand = rcu_dereference(tsk->sighand); + if (unlikely(sighand == NULL)) + break; + + /* + * This sighand can be already freed and even reused, but + * we rely on SLAB_TYPESAFE_BY_RCU and sighand_ctor() which + * initializes ->siglock: this slab can't go away, it has + * the same object type, ->siglock can't be reinitialized. + * + * We need to ensure that tsk->sighand is still the same + * after we take the lock, we can race with de_thread() or + * __exit_signal(). In the latter case the next iteration + * must see ->sighand == NULL. + */ + spin_lock_irqsave(&sighand->siglock, *flags); + if (likely(sighand == rcu_access_pointer(tsk->sighand))) + break; + spin_unlock_irqrestore(&sighand->siglock, *flags); + } + rcu_read_unlock(); + + return sighand; +} + +#ifdef CONFIG_LOCKDEP +void lockdep_assert_task_sighand_held(struct task_struct *task) +{ + struct sighand_struct *sighand; + + rcu_read_lock(); + sighand = rcu_dereference(task->sighand); + if (sighand) + lockdep_assert_held(&sighand->siglock); + else + WARN_ON_ONCE(1); + rcu_read_unlock(); +} +#endif + +/* + * send signal info to all the members of a group + */ +int group_send_sig_info(int sig, struct kernel_siginfo *info, + struct task_struct *p, enum pid_type type) +{ + int ret; + + rcu_read_lock(); + ret = check_kill_permission(sig, info, p); + rcu_read_unlock(); + + if (!ret && sig) + ret = do_send_sig_info(sig, info, p, type); + + return ret; +} + +/* + * __kill_pgrp_info() sends a signal to a process group: this is what the tty + * control characters do (^C, ^Z etc) + * - the caller must hold at least a readlock on tasklist_lock + */ +int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp) +{ + struct task_struct *p = NULL; + int retval, success; + + success = 0; + retval = -ESRCH; + do_each_pid_task(pgrp, PIDTYPE_PGID, p) + { + int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID); + success |= !err; + retval = err; + } + while_each_pid_task(pgrp, PIDTYPE_PGID, p); + return success ? 0 : retval; +} + +int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid) +{ + int error = -ESRCH; + struct task_struct *p; + + for (;;) + { + rcu_read_lock(); + p = pid_task(pid, PIDTYPE_PID); + if (p) + error = group_send_sig_info(sig, info, p, PIDTYPE_TGID); + rcu_read_unlock(); + if (likely(!p || error != -ESRCH)) + return error; + + /* + * The task was unhashed in between, try again. If it + * is dead, pid_task() will return NULL, if we race with + * de_thread() it will find the new leader. + */ + } +} + +static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid) +{ + int error; + rcu_read_lock(); + error = kill_pid_info(sig, info, find_vpid(pid)); + rcu_read_unlock(); + return error; +} + +static inline bool kill_as_cred_perm(const struct cred *cred, + struct task_struct *target) +{ + const struct cred *pcred = __task_cred(target); + + return uid_eq(cred->euid, pcred->suid) || + uid_eq(cred->euid, pcred->uid) || + uid_eq(cred->uid, pcred->suid) || + uid_eq(cred->uid, pcred->uid); +} + +/* + * The usb asyncio usage of siginfo is wrong. The glibc support + * for asyncio which uses SI_ASYNCIO assumes the layout is SIL_RT. + * AKA after the generic fields: + * kernel_pid_t si_pid; + * kernel_uid32_t si_uid; + * sigval_t si_value; + * + * Unfortunately when usb generates SI_ASYNCIO it assumes the layout + * after the generic fields is: + * void __user *si_addr; + * + * This is a practical problem when there is a 64bit big endian kernel + * and a 32bit userspace. As the 32bit address will encoded in the low + * 32bits of the pointer. Those low 32bits will be stored at higher + * address than appear in a 32 bit pointer. So userspace will not + * see the address it was expecting for it's completions. + * + * There is nothing in the encoding that can allow + * copy_siginfo_to_user32 to detect this confusion of formats, so + * handle this by requiring the caller of kill_pid_usb_asyncio to + * notice when this situration takes place and to store the 32bit + * pointer in sival_int, instead of sival_addr of the sigval_t addr + * parameter. + */ +int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, + struct pid *pid, const struct cred *cred) +{ + struct kernel_siginfo info; + struct task_struct *p; + unsigned long flags; + int ret = -EINVAL; + + if (!valid_signal(sig)) + return ret; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = errno; + info.si_code = SI_ASYNCIO; + *((sigval_t *)&info.si_pid) = addr; + + rcu_read_lock(); + p = pid_task(pid, PIDTYPE_PID); + if (!p) + { + ret = -ESRCH; + goto out_unlock; + } + if (!kill_as_cred_perm(cred, p)) + { + ret = -EPERM; + goto out_unlock; + } + ret = security_task_kill(p, &info, sig, cred); + if (ret) + goto out_unlock; + + if (sig) + { + if (lock_task_sighand(p, &flags)) + { + ret = __send_signal(sig, &info, p, PIDTYPE_TGID, false); + unlock_task_sighand(p, &flags); + } + else + ret = -ESRCH; + } +out_unlock: + rcu_read_unlock(); + return ret; +} +EXPORT_SYMBOL_GPL(kill_pid_usb_asyncio); + +/* + * kill_something_info() interprets pid in interesting ways just like kill(2). + * + * POSIX specifies that kill(-1,sig) is unspecified, but what we have + * is probably wrong. Should make it like BSD or SYSV. + */ + +static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid) +{ + int ret; + + if (pid > 0) + return kill_proc_info(sig, info, pid); + + /* -INT_MIN is undefined. Exclude this case to avoid a UBSAN warning */ + if (pid == INT_MIN) + return -ESRCH; + + read_lock(&tasklist_lock); + if (pid != -1) + { + ret = __kill_pgrp_info(sig, info, + pid ? find_vpid(-pid) : task_pgrp(current)); + } + else + { + int retval = 0, count = 0; + struct task_struct *p; + + for_each_process(p) + { + if (task_pid_vnr(p) > 1 && + !same_thread_group(p, current)) + { + int err = group_send_sig_info(sig, info, p, + PIDTYPE_MAX); + ++count; + if (err != -EPERM) + retval = err; + } + } + ret = count ? retval : -ESRCH; + } + read_unlock(&tasklist_lock); + + return ret; +} + +/* + * These are for backward compatibility with the rest of the kernel source. + */ + +int send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) +{ + /* + * Make sure legacy kernel users don't send in bad values + * (normal paths check this in check_kill_permission). + */ + if (!valid_signal(sig)) + return -EINVAL; + + return do_send_sig_info(sig, info, p, PIDTYPE_PID); +} +EXPORT_SYMBOL(send_sig_info); + +#define __si_special(priv) \ + ((priv) ? SEND_SIG_PRIV : SEND_SIG_NOINFO) + +int send_sig(int sig, struct task_struct *p, int priv) +{ + return send_sig_info(sig, __si_special(priv), p); +} +EXPORT_SYMBOL(send_sig); + +void force_sig(int sig) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = SI_KERNEL; + info.si_pid = 0; + info.si_uid = 0; + force_sig_info(&info); +} +EXPORT_SYMBOL(force_sig); + +void force_fatal_sig(int sig) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = SI_KERNEL; + info.si_pid = 0; + info.si_uid = 0; + force_sig_info_to_task(&info, current, true); +} + +/* + * When things go south during signal handling, we + * will force a SIGSEGV. And if the signal that caused + * the problem was already a SIGSEGV, we'll want to + * make sure we don't even try to deliver the signal.. + */ +void force_sigsegv(int sig) +{ + if (sig == SIGSEGV) + force_fatal_sig(SIGSEGV); + else + force_sig(SIGSEGV); +} + +int force_sig_fault_to_task(int sig, int code, void __user *addr ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr), struct task_struct *t) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; +#ifdef __ia64__ + info.si_imm = imm; + info.si_flags = flags; + info.si_isr = isr; +#endif + return force_sig_info_to_task(&info, t, false); +} + +int force_sig_fault(int sig, int code, void __user *addr ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)) +{ + return force_sig_fault_to_task(sig, code, addr ___ARCH_SI_IA64(imm, flags, isr), current); +} + +int send_sig_fault(int sig, int code, void __user *addr ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr), struct task_struct *t) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; +#ifdef __ia64__ + info.si_imm = imm; + info.si_flags = flags; + info.si_isr = isr; +#endif + return send_sig_info(info.si_signo, &info, t); +} + +int force_sig_mceerr(int code, void __user *addr, short lsb) +{ + struct kernel_siginfo info; + + WARN_ON((code != BUS_MCEERR_AO) && (code != BUS_MCEERR_AR)); + clear_siginfo(&info); + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + info.si_addr_lsb = lsb; + return force_sig_info(&info); +} + +int send_sig_mceerr(int code, void __user *addr, short lsb, struct task_struct *t) +{ + struct kernel_siginfo info; + + WARN_ON((code != BUS_MCEERR_AO) && (code != BUS_MCEERR_AR)); + clear_siginfo(&info); + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + info.si_addr_lsb = lsb; + return send_sig_info(info.si_signo, &info, t); +} +EXPORT_SYMBOL(send_sig_mceerr); + +int force_sig_bnderr(void __user *addr, void __user *lower, void __user *upper) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = SEGV_BNDERR; + info.si_addr = addr; + info.si_lower = lower; + info.si_upper = upper; + return force_sig_info(&info); +} + +#ifdef SEGV_PKUERR +int force_sig_pkuerr(void __user *addr, u32 pkey) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = SEGV_PKUERR; + info.si_addr = addr; + info.si_pkey = pkey; + return force_sig_info(&info); +} +#endif + +int force_sig_perf(void __user *addr, u32 type, u64 sig_data) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = SIGTRAP; + info.si_errno = 0; + info.si_code = TRAP_PERF; + info.si_addr = addr; + info.si_perf_data = sig_data; + info.si_perf_type = type; + + return force_sig_info(&info); +} + +/** + * force_sig_seccomp - signals the task to allow in-process syscall emulation + * @syscall: syscall number to send to userland + * @reason: filter-supplied reason code to send to userland (via si_errno) + * + * Forces a SIGSYS with a code of SYS_SECCOMP and related sigsys info. + */ +int force_sig_seccomp(int syscall, int reason, bool force_coredump) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = SIGSYS; + info.si_code = SYS_SECCOMP; + info.si_call_addr = (void __user *)KSTK_EIP(current); + info.si_errno = reason; + info.si_arch = syscall_get_arch(current); + info.si_syscall = syscall; + return force_sig_info_to_task(&info, current, force_coredump); +} + +/* For the crazy architectures that include trap information in + * the errno field, instead of an actual errno value. + */ +int force_sig_ptrace_errno_trap(int errno, void __user *addr) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = SIGTRAP; + info.si_errno = errno; + info.si_code = TRAP_HWBKPT; + info.si_addr = addr; + return force_sig_info(&info); +} + +/* For the rare architectures that include trap information using + * si_trapno. + */ +int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + info.si_trapno = trapno; + return force_sig_info(&info); +} + +/* For the rare architectures that include trap information using + * si_trapno. + */ +int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno, + struct task_struct *t) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + info.si_trapno = trapno; + return send_sig_info(info.si_signo, &info, t); +} + +int kill_pgrp(struct pid *pid, int sig, int priv) +{ + int ret; + + read_lock(&tasklist_lock); + ret = __kill_pgrp_info(sig, __si_special(priv), pid); + read_unlock(&tasklist_lock); + + return ret; +} +EXPORT_SYMBOL(kill_pgrp); + +int kill_pid(struct pid *pid, int sig, int priv) +{ + return kill_pid_info(sig, __si_special(priv), pid); +} +EXPORT_SYMBOL(kill_pid); + +/* + * These functions support sending signals using preallocated sigqueue + * structures. This is needed "because realtime applications cannot + * afford to lose notifications of asynchronous events, like timer + * expirations or I/O completions". In the case of POSIX Timers + * we allocate the sigqueue structure from the timer_create. If this + * allocation fails we are able to report the failure to the application + * with an EAGAIN error. + */ +struct sigqueue *sigqueue_alloc(void) +{ + return __sigqueue_alloc(-1, current, GFP_KERNEL, 0, SIGQUEUE_PREALLOC); +} + +void sigqueue_free(struct sigqueue *q) +{ + unsigned long flags; + spinlock_t *lock = ¤t->sighand->siglock; + + BUG_ON(!(q->flags & SIGQUEUE_PREALLOC)); + /* + * We must hold ->siglock while testing q->list + * to serialize with collect_signal() or with + * __exit_signal()->flush_sigqueue(). + */ + spin_lock_irqsave(lock, flags); + q->flags &= ~SIGQUEUE_PREALLOC; + /* + * If it is queued it will be freed when dequeued, + * like the "regular" sigqueue. + */ + if (!list_empty(&q->list)) + q = NULL; + spin_unlock_irqrestore(lock, flags); + + if (q) + __sigqueue_free(q); +} + +int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type) +{ + int sig = q->info.si_signo; + struct sigpending *pending; + struct task_struct *t; + unsigned long flags; + int ret, result; + + BUG_ON(!(q->flags & SIGQUEUE_PREALLOC)); + + ret = -1; + rcu_read_lock(); + t = pid_task(pid, type); + if (!t || !likely(lock_task_sighand(t, &flags))) + goto ret; + + ret = 1; /* the signal is ignored */ + result = TRACE_SIGNAL_IGNORED; + if (!prepare_signal(sig, t, false)) + goto out; + + ret = 0; + if (unlikely(!list_empty(&q->list))) + { + /* + * If an SI_TIMER entry is already queue just increment + * the overrun count. + */ + BUG_ON(q->info.si_code != SI_TIMER); + q->info.si_overrun++; + result = TRACE_SIGNAL_ALREADY_PENDING; + goto out; + } + q->info.si_overrun = 0; + + signalfd_notify(t, sig); + pending = (type != PIDTYPE_PID) ? &t->signal->shared_pending : &t->pending; + list_add_tail(&q->list, &pending->list); + sigaddset(&pending->signal, sig); + complete_signal(sig, t, type); + result = TRACE_SIGNAL_DELIVERED; +out: + trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result); + unlock_task_sighand(t, &flags); +ret: + rcu_read_unlock(); + return ret; +} + +static void do_notify_pidfd(struct task_struct *task) +{ + struct pid *pid; + + WARN_ON(task->exit_state == 0); + pid = task_pid(task); + wake_up_all(&pid->wait_pidfd); +} + +/* + * Let a parent know about the death of a child. + * For a stopped/continued status change, use do_notify_parent_cldstop instead. + * + * Returns true if our parent ignored us and so we've switched to + * self-reaping. + */ +bool do_notify_parent(struct task_struct *tsk, int sig) +{ + struct kernel_siginfo info; + unsigned long flags; + struct sighand_struct *psig; + bool autoreap = false; + u64 utime, stime; + + BUG_ON(sig == -1); + + /* do_notify_parent_cldstop should have been called instead. */ + BUG_ON(task_is_stopped_or_traced(tsk)); + + BUG_ON(!tsk->ptrace && + (tsk->group_leader != tsk || !thread_group_empty(tsk))); + + /* Wake up all pidfd waiters */ + do_notify_pidfd(tsk); + + if (sig != SIGCHLD) + { + /* + * This is only possible if parent == real_parent. + * Check if it has changed security domain. + */ + if (tsk->parent_exec_id != READ_ONCE(tsk->parent->self_exec_id)) + sig = SIGCHLD; + } + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + /* + * We are under tasklist_lock here so our parent is tied to + * us and cannot change. + * + * task_active_pid_ns will always return the same pid namespace + * until a task passes through release_task. + * + * write_lock() currently calls preempt_disable() which is the + * same as rcu_read_lock(), but according to Oleg, this is not + * correct to rely on this + */ + rcu_read_lock(); + info.si_pid = task_pid_nr_ns(tsk, task_active_pid_ns(tsk->parent)); + info.si_uid = from_kuid_munged(task_cred_xxx(tsk->parent, user_ns), + task_uid(tsk)); + rcu_read_unlock(); + + task_cputime(tsk, &utime, &stime); + info.si_utime = nsec_to_clock_t(utime + tsk->signal->utime); + info.si_stime = nsec_to_clock_t(stime + tsk->signal->stime); + + info.si_status = tsk->exit_code & 0x7f; + if (tsk->exit_code & 0x80) + info.si_code = CLD_DUMPED; + else if (tsk->exit_code & 0x7f) + info.si_code = CLD_KILLED; + else + { + info.si_code = CLD_EXITED; + info.si_status = tsk->exit_code >> 8; + } + + psig = tsk->parent->sighand; + spin_lock_irqsave(&psig->siglock, flags); + if (!tsk->ptrace && sig == SIGCHLD && + (psig->action[SIGCHLD - 1].sa.sa_handler == SIG_IGN || + (psig->action[SIGCHLD - 1].sa.sa_flags & SA_NOCLDWAIT))) + { + /* + * We are exiting and our parent doesn't care. POSIX.1 + * defines special semantics for setting SIGCHLD to SIG_IGN + * or setting the SA_NOCLDWAIT flag: we should be reaped + * automatically and not left for our parent's wait4 call. + * Rather than having the parent do it as a magic kind of + * signal handler, we just set this to tell do_exit that we + * can be cleaned up without becoming a zombie. Note that + * we still call __wake_up_parent in this case, because a + * blocked sys_wait4 might now return -ECHILD. + * + * Whether we send SIGCHLD or not for SA_NOCLDWAIT + * is implementation-defined: we do (if you don't want + * it, just use SIG_IGN instead). + */ + autoreap = true; + if (psig->action[SIGCHLD - 1].sa.sa_handler == SIG_IGN) + sig = 0; + } + /* + * Send with __send_signal as si_pid and si_uid are in the + * parent's namespaces. + */ + if (valid_signal(sig) && sig) + __send_signal(sig, &info, tsk->parent, PIDTYPE_TGID, false); + __wake_up_parent(tsk, tsk->parent); + spin_unlock_irqrestore(&psig->siglock, flags); + + return autoreap; +} + +/** + * do_notify_parent_cldstop - notify parent of stopped/continued state change + * @tsk: task reporting the state change + * @for_ptracer: the notification is for ptracer + * @why: CLD_{CONTINUED|STOPPED|TRAPPED} to report + * + * Notify @tsk's parent that the stopped/continued state has changed. If + * @for_ptracer is %false, @tsk's group leader notifies to its real parent. + * If %true, @tsk reports to @tsk->parent which should be the ptracer. + * + * CONTEXT: + * Must be called with tasklist_lock at least read locked. + */ +static void do_notify_parent_cldstop(struct task_struct *tsk, + bool for_ptracer, int why) +{ + struct kernel_siginfo info; + unsigned long flags; + struct task_struct *parent; + struct sighand_struct *sighand; + u64 utime, stime; + + if (for_ptracer) + { + parent = tsk->parent; + } + else + { + tsk = tsk->group_leader; + parent = tsk->real_parent; + } + + clear_siginfo(&info); + info.si_signo = SIGCHLD; + info.si_errno = 0; + /* + * see comment in do_notify_parent() about the following 4 lines + */ + rcu_read_lock(); + info.si_pid = task_pid_nr_ns(tsk, task_active_pid_ns(parent)); + info.si_uid = from_kuid_munged(task_cred_xxx(parent, user_ns), task_uid(tsk)); + rcu_read_unlock(); + + task_cputime(tsk, &utime, &stime); + info.si_utime = nsec_to_clock_t(utime); + info.si_stime = nsec_to_clock_t(stime); + + info.si_code = why; + switch (why) + { + case CLD_CONTINUED: + info.si_status = SIGCONT; + break; + case CLD_STOPPED: + info.si_status = tsk->signal->group_exit_code & 0x7f; + break; + case CLD_TRAPPED: + info.si_status = tsk->exit_code & 0x7f; + break; + default: + BUG(); + } + + sighand = parent->sighand; + spin_lock_irqsave(&sighand->siglock, flags); + if (sighand->action[SIGCHLD - 1].sa.sa_handler != SIG_IGN && + !(sighand->action[SIGCHLD - 1].sa.sa_flags & SA_NOCLDSTOP)) + __group_send_sig_info(SIGCHLD, &info, parent); + /* + * Even if SIGCHLD is not generated, we must wake up wait4 calls. + */ + __wake_up_parent(tsk, parent); + spin_unlock_irqrestore(&sighand->siglock, flags); +} + +/* + * This must be called with current->sighand->siglock held. + * + * This should be the path for all ptrace stops. + * We always set current->last_siginfo while stopped here. + * That makes it a way to test a stopped process for + * being ptrace-stopped vs being job-control-stopped. + * + * If we actually decide not to stop at all because the tracer + * is gone, we keep current->exit_code unless clear_code. + */ +static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t *info) + __releases(¤t->sighand->siglock) + __acquires(¤t->sighand->siglock) +{ + bool gstop_done = false; + + if (arch_ptrace_stop_needed()) + { + /* + * The arch code has something special to do before a + * ptrace stop. This is allowed to block, e.g. for faults + * on user stack pages. We can't keep the siglock while + * calling arch_ptrace_stop, so we must release it now. + * To preserve proper semantics, we must do this before + * any signal bookkeeping like checking group_stop_count. + */ + spin_unlock_irq(¤t->sighand->siglock); + arch_ptrace_stop(); + spin_lock_irq(¤t->sighand->siglock); + } + + /* + * schedule() will not sleep if there is a pending signal that + * can awaken the task. + */ + set_special_state(TASK_TRACED); + + /* + * We're committing to trapping. TRACED should be visible before + * TRAPPING is cleared; otherwise, the tracer might fail do_wait(). + * Also, transition to TRACED and updates to ->jobctl should be + * atomic with respect to siglock and should be done after the arch + * hook as siglock is released and regrabbed across it. + * + * TRACER TRACEE + * + * ptrace_attach() + * [L] wait_on_bit(JOBCTL_TRAPPING) [S] set_special_state(TRACED) + * do_wait() + * set_current_state() smp_wmb(); + * ptrace_do_wait() + * wait_task_stopped() + * task_stopped_code() + * [L] task_is_traced() [S] task_clear_jobctl_trapping(); + */ + smp_wmb(); + + current->last_siginfo = info; + current->exit_code = exit_code; + + /* + * If @why is CLD_STOPPED, we're trapping to participate in a group + * stop. Do the bookkeeping. Note that if SIGCONT was delievered + * across siglock relocks since INTERRUPT was scheduled, PENDING + * could be clear now. We act as if SIGCONT is received after + * TASK_TRACED is entered - ignore it. + */ + if (why == CLD_STOPPED && (current->jobctl & JOBCTL_STOP_PENDING)) + gstop_done = task_participate_group_stop(current); + + /* any trap clears pending STOP trap, STOP trap clears NOTIFY */ + task_clear_jobctl_pending(current, JOBCTL_TRAP_STOP); + if (info && info->si_code >> 8 == PTRACE_EVENT_STOP) + task_clear_jobctl_pending(current, JOBCTL_TRAP_NOTIFY); + + /* entering a trap, clear TRAPPING */ + task_clear_jobctl_trapping(current); + + spin_unlock_irq(¤t->sighand->siglock); + read_lock(&tasklist_lock); + if (likely(current->ptrace)) + { + /* + * Notify parents of the stop. + * + * While ptraced, there are two parents - the ptracer and + * the real_parent of the group_leader. The ptracer should + * know about every stop while the real parent is only + * interested in the completion of group stop. The states + * for the two don't interact with each other. Notify + * separately unless they're gonna be duplicates. + */ + do_notify_parent_cldstop(current, true, why); + if (gstop_done && ptrace_reparented(current)) + do_notify_parent_cldstop(current, false, why); + + /* + * Don't want to allow preemption here, because + * sys_ptrace() needs this task to be inactive. + * + * XXX: implement read_unlock_no_resched(). + */ + preempt_disable(); + read_unlock(&tasklist_lock); + cgroup_enter_frozen(); + preempt_enable_no_resched(); + freezable_schedule(); + cgroup_leave_frozen(true); + } + else + { + /* + * By the time we got the lock, our tracer went away. + * Don't drop the lock yet, another tracer may come. + * + * If @gstop_done, the ptracer went away between group stop + * completion and here. During detach, it would have set + * JOBCTL_STOP_PENDING on us and we'll re-enter + * TASK_STOPPED in do_signal_stop() on return, so notifying + * the real parent of the group stop completion is enough. + */ + if (gstop_done) + do_notify_parent_cldstop(current, false, why); + + /* tasklist protects us from ptrace_freeze_traced() */ + __set_current_state(TASK_RUNNING); + if (clear_code) + current->exit_code = 0; + read_unlock(&tasklist_lock); + } + + /* + * We are back. Now reacquire the siglock before touching + * last_siginfo, so that we are sure to have synchronized with + * any signal-sending on another CPU that wants to examine it. + */ + spin_lock_irq(¤t->sighand->siglock); + current->last_siginfo = NULL; + + /* LISTENING can be set only during STOP traps, clear it */ + current->jobctl &= ~JOBCTL_LISTENING; + + /* + * Queued signals ignored us while we were stopped for tracing. + * So check for any that we should take before resuming user mode. + * This sets TIF_SIGPENDING, but never clears it. + */ + recalc_sigpending_tsk(current); +} + +static void ptrace_do_notify(int signr, int exit_code, int why) +{ + kernel_siginfo_t info; + + clear_siginfo(&info); + info.si_signo = signr; + info.si_code = exit_code; + info.si_pid = task_pid_vnr(current); + info.si_uid = from_kuid_munged(current_user_ns(), current_uid()); + + /* Let the debugger run. */ + ptrace_stop(exit_code, why, 1, &info); +} + +void ptrace_notify(int exit_code) +{ + BUG_ON((exit_code & (0x7f | ~0xffff)) != SIGTRAP); + if (unlikely(current->task_works)) + task_work_run(); + + spin_lock_irq(¤t->sighand->siglock); + ptrace_do_notify(SIGTRAP, exit_code, CLD_TRAPPED); + spin_unlock_irq(¤t->sighand->siglock); +} + +/** + * do_signal_stop - handle group stop for SIGSTOP and other stop signals + * @signr: signr causing group stop if initiating + * + * If %JOBCTL_STOP_PENDING is not set yet, initiate group stop with @signr + * and participate in it. If already set, participate in the existing + * group stop. If participated in a group stop (and thus slept), %true is + * returned with siglock released. + * + * If ptraced, this function doesn't handle stop itself. Instead, + * %JOBCTL_TRAP_STOP is scheduled and %false is returned with siglock + * untouched. The caller must ensure that INTERRUPT trap handling takes + * places afterwards. + * + * CONTEXT: + * Must be called with @current->sighand->siglock held, which is released + * on %true return. + * + * RETURNS: + * %false if group stop is already cancelled or ptrace trap is scheduled. + * %true if participated in group stop. + */ +static bool do_signal_stop(int signr) + __releases(¤t->sighand->siglock) +{ + struct signal_struct *sig = current->signal; + + if (!(current->jobctl & JOBCTL_STOP_PENDING)) + { + unsigned long gstop = JOBCTL_STOP_PENDING | JOBCTL_STOP_CONSUME; + struct task_struct *t; + + /* signr will be recorded in task->jobctl for retries */ + WARN_ON_ONCE(signr & ~JOBCTL_STOP_SIGMASK); + + if (!likely(current->jobctl & JOBCTL_STOP_DEQUEUED) || + unlikely(signal_group_exit(sig))) + return false; + /* + * There is no group stop already in progress. We must + * initiate one now. + * + * While ptraced, a task may be resumed while group stop is + * still in effect and then receive a stop signal and + * initiate another group stop. This deviates from the + * usual behavior as two consecutive stop signals can't + * cause two group stops when !ptraced. That is why we + * also check !task_is_stopped(t) below. + * + * The condition can be distinguished by testing whether + * SIGNAL_STOP_STOPPED is already set. Don't generate + * group_exit_code in such case. + * + * This is not necessary for SIGNAL_STOP_CONTINUED because + * an intervening stop signal is required to cause two + * continued events regardless of ptrace. + */ + if (!(sig->flags & SIGNAL_STOP_STOPPED)) + sig->group_exit_code = signr; + + sig->group_stop_count = 0; + + if (task_set_jobctl_pending(current, signr | gstop)) + sig->group_stop_count++; + + t = current; + while_each_thread(current, t) + { + /* + * Setting state to TASK_STOPPED for a group + * stop is always done with the siglock held, + * so this check has no races. + */ + if (!task_is_stopped(t) && + task_set_jobctl_pending(t, signr | gstop)) + { + sig->group_stop_count++; + if (likely(!(t->ptrace & PT_SEIZED))) + signal_wake_up(t, 0); + else + ptrace_trap_notify(t); + } + } + } + + if (likely(!current->ptrace)) + { + int notify = 0; + + /* + * If there are no other threads in the group, or if there + * is a group stop in progress and we are the last to stop, + * report to the parent. + */ + if (task_participate_group_stop(current)) + notify = CLD_STOPPED; + + set_special_state(TASK_STOPPED); + spin_unlock_irq(¤t->sighand->siglock); + + /* + * Notify the parent of the group stop completion. Because + * we're not holding either the siglock or tasklist_lock + * here, ptracer may attach inbetween; however, this is for + * group stop and should always be delivered to the real + * parent of the group leader. The new ptracer will get + * its notification when this task transitions into + * TASK_TRACED. + */ + if (notify) + { + read_lock(&tasklist_lock); + do_notify_parent_cldstop(current, false, notify); + read_unlock(&tasklist_lock); + } + + /* Now we don't run again until woken by SIGCONT or SIGKILL */ + cgroup_enter_frozen(); + freezable_schedule(); + return true; + } + else + { + /* + * While ptraced, group stop is handled by STOP trap. + * Schedule it and let the caller deal with it. + */ + task_set_jobctl_pending(current, JOBCTL_TRAP_STOP); + return false; + } +} + +/** + * do_jobctl_trap - take care of ptrace jobctl traps + * + * When PT_SEIZED, it's used for both group stop and explicit + * SEIZE/INTERRUPT traps. Both generate PTRACE_EVENT_STOP trap with + * accompanying siginfo. If stopped, lower eight bits of exit_code contain + * the stop signal; otherwise, %SIGTRAP. + * + * When !PT_SEIZED, it's used only for group stop trap with stop signal + * number as exit_code and no siginfo. + * + * CONTEXT: + * Must be called with @current->sighand->siglock held, which may be + * released and re-acquired before returning with intervening sleep. + */ +static void do_jobctl_trap(void) +{ + struct signal_struct *signal = current->signal; + int signr = current->jobctl & JOBCTL_STOP_SIGMASK; + + if (current->ptrace & PT_SEIZED) + { + if (!signal->group_stop_count && + !(signal->flags & SIGNAL_STOP_STOPPED)) + signr = SIGTRAP; + WARN_ON_ONCE(!signr); + ptrace_do_notify(signr, signr | (PTRACE_EVENT_STOP << 8), + CLD_STOPPED); + } + else + { + WARN_ON_ONCE(!signr); + ptrace_stop(signr, CLD_STOPPED, 0, NULL); + current->exit_code = 0; + } +} + +/** + * do_freezer_trap - handle the freezer jobctl trap + * + * Puts the task into frozen state, if only the task is not about to quit. + * In this case it drops JOBCTL_TRAP_FREEZE. + * + * CONTEXT: + * Must be called with @current->sighand->siglock held, + * which is always released before returning. + */ +static void do_freezer_trap(void) + __releases(¤t->sighand->siglock) +{ + /* + * If there are other trap bits pending except JOBCTL_TRAP_FREEZE, + * let's make another loop to give it a chance to be handled. + * In any case, we'll return back. + */ + if ((current->jobctl & (JOBCTL_PENDING_MASK | JOBCTL_TRAP_FREEZE)) != + JOBCTL_TRAP_FREEZE) + { + spin_unlock_irq(¤t->sighand->siglock); + return; + } + + /* + * Now we're sure that there is no pending fatal signal and no + * pending traps. Clear TIF_SIGPENDING to not get out of schedule() + * immediately (if there is a non-fatal signal pending), and + * put the task into sleep. + */ + __set_current_state(TASK_INTERRUPTIBLE); + clear_thread_flag(TIF_SIGPENDING); + spin_unlock_irq(¤t->sighand->siglock); + cgroup_enter_frozen(); + freezable_schedule(); +} + +static int ptrace_signal(int signr, kernel_siginfo_t *info) +{ + /* + * We do not check sig_kernel_stop(signr) but set this marker + * unconditionally because we do not know whether debugger will + * change signr. This flag has no meaning unless we are going + * to stop after return from ptrace_stop(). In this case it will + * be checked in do_signal_stop(), we should only stop if it was + * not cleared by SIGCONT while we were sleeping. See also the + * comment in dequeue_signal(). + */ + current->jobctl |= JOBCTL_STOP_DEQUEUED; + ptrace_stop(signr, CLD_TRAPPED, 0, info); + + /* We're back. Did the debugger cancel the sig? */ + signr = current->exit_code; + if (signr == 0) + return signr; + + current->exit_code = 0; + + /* + * Update the siginfo structure if the signal has + * changed. If the debugger wanted something + * specific in the siginfo structure then it should + * have updated *info via PTRACE_SETSIGINFO. + */ + if (signr != info->si_signo) + { + clear_siginfo(info); + info->si_signo = signr; + info->si_errno = 0; + info->si_code = SI_USER; + rcu_read_lock(); + info->si_pid = task_pid_vnr(current->parent); + info->si_uid = from_kuid_munged(current_user_ns(), + task_uid(current->parent)); + rcu_read_unlock(); + } + + /* If the (new) signal is now blocked, requeue it. */ + if (sigismember(¤t->blocked, signr)) + { + send_signal(signr, info, current, PIDTYPE_PID); + signr = 0; + } + + return signr; +} + +static void hide_si_addr_tag_bits(struct ksignal *ksig) +{ + switch (siginfo_layout(ksig->sig, ksig->info.si_code)) + { + case SIL_FAULT: + case SIL_FAULT_TRAPNO: + case SIL_FAULT_MCEERR: + case SIL_FAULT_BNDERR: + case SIL_FAULT_PKUERR: + case SIL_FAULT_PERF_EVENT: + ksig->info.si_addr = arch_untagged_si_addr( + ksig->info.si_addr, ksig->sig, ksig->info.si_code); + break; + case SIL_KILL: + case SIL_TIMER: + case SIL_POLL: + case SIL_CHLD: + case SIL_RT: + case SIL_SYS: + break; + } +} + +bool get_signal(struct ksignal *ksig) +{ + struct sighand_struct *sighand = current->sighand; + struct signal_struct *signal = current->signal; + int signr; + + if (unlikely(current->task_works)) + task_work_run(); + + /* + * For non-generic architectures, check for TIF_NOTIFY_SIGNAL so + * that the arch handlers don't all have to do it. If we get here + * without TIF_SIGPENDING, just exit after running signal work. + */ + if (!IS_ENABLED(CONFIG_GENERIC_ENTRY)) + { + if (test_thread_flag(TIF_NOTIFY_SIGNAL)) + tracehook_notify_signal(); + if (!task_sigpending(current)) + return false; + } + + if (unlikely(uprobe_deny_signal())) + return false; + + /* + * Do this once, we can't return to user-mode if freezing() == T. + * do_signal_stop() and ptrace_stop() do freezable_schedule() and + * thus do not need another check after return. + */ + try_to_freeze(); + +relock: + spin_lock_irq(&sighand->siglock); + + /* + * Every stopped thread goes here after wakeup. Check to see if + * we should notify the parent, prepare_signal(SIGCONT) encodes + * the CLD_ si_code into SIGNAL_CLD_MASK bits. + */ + if (unlikely(signal->flags & SIGNAL_CLD_MASK)) + { + int why; + + if (signal->flags & SIGNAL_CLD_CONTINUED) + why = CLD_CONTINUED; + else + why = CLD_STOPPED; + + signal->flags &= ~SIGNAL_CLD_MASK; + + spin_unlock_irq(&sighand->siglock); + + /* + * Notify the parent that we're continuing. This event is + * always per-process and doesn't make whole lot of sense + * for ptracers, who shouldn't consume the state via + * wait(2) either, but, for backward compatibility, notify + * the ptracer of the group leader too unless it's gonna be + * a duplicate. + */ + read_lock(&tasklist_lock); + do_notify_parent_cldstop(current, false, why); + + if (ptrace_reparented(current->group_leader)) + do_notify_parent_cldstop(current->group_leader, + true, why); + read_unlock(&tasklist_lock); + + goto relock; + } + + /* Has this task already been marked for death? */ + if (signal_group_exit(signal)) + { + ksig->info.si_signo = signr = SIGKILL; + sigdelset(¤t->pending.signal, SIGKILL); + trace_signal_deliver(SIGKILL, SEND_SIG_NOINFO, + &sighand->action[SIGKILL - 1]); + recalc_sigpending(); + goto fatal; + } + + for (;;) + { + struct k_sigaction *ka; + + if (unlikely(current->jobctl & JOBCTL_STOP_PENDING) && + do_signal_stop(0)) + goto relock; + + if (unlikely(current->jobctl & + (JOBCTL_TRAP_MASK | JOBCTL_TRAP_FREEZE))) + { + if (current->jobctl & JOBCTL_TRAP_MASK) + { + do_jobctl_trap(); + spin_unlock_irq(&sighand->siglock); + } + else if (current->jobctl & JOBCTL_TRAP_FREEZE) + do_freezer_trap(); + + goto relock; + } + + /* + * If the task is leaving the frozen state, let's update + * cgroup counters and reset the frozen bit. + */ + if (unlikely(cgroup_task_frozen(current))) + { + spin_unlock_irq(&sighand->siglock); + cgroup_leave_frozen(false); + goto relock; + } + + /* + * Signals generated by the execution of an instruction + * need to be delivered before any other pending signals + * so that the instruction pointer in the signal stack + * frame points to the faulting instruction. + */ + signr = dequeue_synchronous_signal(&ksig->info); + if (!signr) + signr = dequeue_signal(current, ¤t->blocked, &ksig->info); + + if (!signr) + break; /* will return 0 */ + + if (unlikely(current->ptrace) && (signr != SIGKILL) && + !(sighand->action[signr - 1].sa.sa_flags & SA_IMMUTABLE)) + { + signr = ptrace_signal(signr, &ksig->info); + if (!signr) + continue; + } + + ka = &sighand->action[signr - 1]; + + /* Trace actually delivered signals. */ + trace_signal_deliver(signr, &ksig->info, ka); + + if (ka->sa.sa_handler == SIG_IGN) /* Do nothing. */ + continue; + if (ka->sa.sa_handler != SIG_DFL) + { + /* Run the handler. */ + ksig->ka = *ka; + + if (ka->sa.sa_flags & SA_ONESHOT) + ka->sa.sa_handler = SIG_DFL; + + break; /* will return non-zero "signr" value */ + } + + /* + * Now we are doing the default action for this signal. + */ + if (sig_kernel_ignore(signr)) /* Default is nothing. */ + continue; + + /* + * Global init gets no signals it doesn't want. + * Container-init gets no signals it doesn't want from same + * container. + * + * Note that if global/container-init sees a sig_kernel_only() + * signal here, the signal must have been generated internally + * or must have come from an ancestor namespace. In either + * case, the signal cannot be dropped. + */ + if (unlikely(signal->flags & SIGNAL_UNKILLABLE) && + !sig_kernel_only(signr)) + continue; + + if (sig_kernel_stop(signr)) + { + /* + * The default action is to stop all threads in + * the thread group. The job control signals + * do nothing in an orphaned pgrp, but SIGSTOP + * always works. Note that siglock needs to be + * dropped during the call to is_orphaned_pgrp() + * because of lock ordering with tasklist_lock. + * This allows an intervening SIGCONT to be posted. + * We need to check for that and bail out if necessary. + */ + if (signr != SIGSTOP) + { + spin_unlock_irq(&sighand->siglock); + + /* signals can be posted during this window */ + + if (is_current_pgrp_orphaned()) + goto relock; + + spin_lock_irq(&sighand->siglock); + } + + if (likely(do_signal_stop(ksig->info.si_signo))) + { + /* It released the siglock. */ + goto relock; + } + + /* + * We didn't actually stop, due to a race + * with SIGCONT or something like that. + */ + continue; + } + + fatal: + spin_unlock_irq(&sighand->siglock); + if (unlikely(cgroup_task_frozen(current))) + cgroup_leave_frozen(true); + + /* + * Anything else is fatal, maybe with a core dump. + */ + current->flags |= PF_SIGNALED; + + if (sig_kernel_coredump(signr)) + { + if (print_fatal_signals) + print_fatal_signal(ksig->info.si_signo); + proc_coredump_connector(current); + /* + * If it was able to dump core, this kills all + * other threads in the group and synchronizes with + * their demise. If we lost the race with another + * thread getting here, it set group_exit_code + * first and our do_group_exit call below will use + * that value and ignore the one we pass it. + */ + do_coredump(&ksig->info); + } + + /* + * PF_IO_WORKER threads will catch and exit on fatal signals + * themselves. They have cleanup that must be performed, so + * we cannot call do_exit() on their behalf. + */ + if (current->flags & PF_IO_WORKER) + goto out; + + /* + * Death signals, no core dump. + */ + do_group_exit(ksig->info.si_signo); + /* NOTREACHED */ + } + spin_unlock_irq(&sighand->siglock); +out: + ksig->sig = signr; + + if (!(ksig->ka.sa.sa_flags & SA_EXPOSE_TAGBITS)) + hide_si_addr_tag_bits(ksig); + + return ksig->sig > 0; +} + +/** + * signal_delivered - + * @ksig: kernel signal struct + * @stepping: nonzero if debugger single-step or block-step in use + * + * This function should be called when a signal has successfully been + * delivered. It updates the blocked signals accordingly (@ksig->ka.sa.sa_mask + * is always blocked, and the signal itself is blocked unless %SA_NODEFER + * is set in @ksig->ka.sa.sa_flags. Tracing is notified. + */ +static void signal_delivered(struct ksignal *ksig, int stepping) +{ + sigset_t blocked; + + /* A signal was successfully delivered, and the + saved sigmask was stored on the signal frame, + and will be restored by sigreturn. So we can + simply clear the restore sigmask flag. */ + clear_restore_sigmask(); + + sigorsets(&blocked, ¤t->blocked, &ksig->ka.sa.sa_mask); + if (!(ksig->ka.sa.sa_flags & SA_NODEFER)) + sigaddset(&blocked, ksig->sig); + set_current_blocked(&blocked); + if (current->sas_ss_flags & SS_AUTODISARM) + sas_ss_reset(current); + tracehook_signal_handler(stepping); +} + +void signal_setup_done(int failed, struct ksignal *ksig, int stepping) +{ + if (failed) + force_sigsegv(ksig->sig); + else + signal_delivered(ksig, stepping); +} + +/* + * It could be that complete_signal() picked us to notify about the + * group-wide signal. Other threads should be notified now to take + * the shared signals in @which since we will not. + */ +static void retarget_shared_pending(struct task_struct *tsk, sigset_t *which) +{ + sigset_t retarget; + struct task_struct *t; + + sigandsets(&retarget, &tsk->signal->shared_pending.signal, which); + if (sigisemptyset(&retarget)) + return; + + t = tsk; + while_each_thread(tsk, t) + { + if (t->flags & PF_EXITING) + continue; + + if (!has_pending_signals(&retarget, &t->blocked)) + continue; + /* Remove the signals this thread can handle. */ + sigandsets(&retarget, &retarget, &t->blocked); + + if (!task_sigpending(t)) + signal_wake_up(t, 0); + + if (sigisemptyset(&retarget)) + break; + } +} + +void exit_signals(struct task_struct *tsk) +{ + int group_stop = 0; + sigset_t unblocked; + + /* + * @tsk is about to have PF_EXITING set - lock out users which + * expect stable threadgroup. + */ + cgroup_threadgroup_change_begin(tsk); + + if (thread_group_empty(tsk) || signal_group_exit(tsk->signal)) + { + tsk->flags |= PF_EXITING; + cgroup_threadgroup_change_end(tsk); + return; + } + + spin_lock_irq(&tsk->sighand->siglock); + /* + * From now this task is not visible for group-wide signals, + * see wants_signal(), do_signal_stop(). + */ + tsk->flags |= PF_EXITING; + + cgroup_threadgroup_change_end(tsk); + + if (!task_sigpending(tsk)) + goto out; + + unblocked = tsk->blocked; + signotset(&unblocked); + retarget_shared_pending(tsk, &unblocked); + + if (unlikely(tsk->jobctl & JOBCTL_STOP_PENDING) && + task_participate_group_stop(tsk)) + group_stop = CLD_STOPPED; +out: + spin_unlock_irq(&tsk->sighand->siglock); + + /* + * If group stop has completed, deliver the notification. This + * should always go to the real parent of the group leader. + */ + if (unlikely(group_stop)) + { + read_lock(&tasklist_lock); + do_notify_parent_cldstop(tsk, false, group_stop); + read_unlock(&tasklist_lock); + } +} + +/* + * System call entry points. + */ + +/** + * sys_restart_syscall - restart a system call + */ +SYSCALL_DEFINE0(restart_syscall) +{ + struct restart_block *restart = ¤t->restart_block; + return restart->fn(restart); +} + +long do_no_restart_syscall(struct restart_block *param) +{ + return -EINTR; +} + +static void __set_task_blocked(struct task_struct *tsk, const sigset_t *newset) +{ + if (task_sigpending(tsk) && !thread_group_empty(tsk)) + { + sigset_t newblocked; + /* A set of now blocked but previously unblocked signals. */ + sigandnsets(&newblocked, newset, ¤t->blocked); + retarget_shared_pending(tsk, &newblocked); + } + tsk->blocked = *newset; + recalc_sigpending(); +} + +/** + * set_current_blocked - change current->blocked mask + * @newset: new mask + * + * It is wrong to change ->blocked directly, this helper should be used + * to ensure the process can't miss a shared signal we are going to block. + */ +void set_current_blocked(sigset_t *newset) +{ + sigdelsetmask(newset, sigmask(SIGKILL) | sigmask(SIGSTOP)); + __set_current_blocked(newset); +} + +void __set_current_blocked(const sigset_t *newset) +{ + struct task_struct *tsk = current; + + /* + * In case the signal mask hasn't changed, there is nothing we need + * to do. The current->blocked shouldn't be modified by other task. + */ + if (sigequalsets(&tsk->blocked, newset)) + return; + + spin_lock_irq(&tsk->sighand->siglock); + __set_task_blocked(tsk, newset); + spin_unlock_irq(&tsk->sighand->siglock); +} + +/* + * This is also useful for kernel threads that want to temporarily + * (or permanently) block certain signals. + * + * NOTE! Unlike the user-mode sys_sigprocmask(), the kernel + * interface happily blocks "unblockable" signals like SIGKILL + * and friends. + */ +int sigprocmask(int how, sigset_t *set, sigset_t *oldset) +{ + struct task_struct *tsk = current; + sigset_t newset; + + /* Lockless, only current can change ->blocked, never from irq */ + if (oldset) + *oldset = tsk->blocked; + + switch (how) + { + case SIG_BLOCK: + sigorsets(&newset, &tsk->blocked, set); + break; + case SIG_UNBLOCK: + sigandnsets(&newset, &tsk->blocked, set); + break; + case SIG_SETMASK: + newset = *set; + break; + default: + return -EINVAL; + } + + __set_current_blocked(&newset); + return 0; +} +EXPORT_SYMBOL(sigprocmask); + +/* + * The api helps set app-provided sigmasks. + * + * This is useful for syscalls such as ppoll, pselect, io_pgetevents and + * epoll_pwait where a new sigmask is passed from userland for the syscalls. + * + * Note that it does set_restore_sigmask() in advance, so it must be always + * paired with restore_saved_sigmask_unless() before return from syscall. + */ +int set_user_sigmask(const sigset_t __user *umask, size_t sigsetsize) +{ + sigset_t kmask; + + if (!umask) + return 0; + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + if (copy_from_user(&kmask, umask, sizeof(sigset_t))) + return -EFAULT; + + set_restore_sigmask(); + current->saved_sigmask = current->blocked; + set_current_blocked(&kmask); + + return 0; +} + +#ifdef CONFIG_COMPAT +int set_compat_user_sigmask(const compat_sigset_t __user *umask, + size_t sigsetsize) +{ + sigset_t kmask; + + if (!umask) + return 0; + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + if (get_compat_sigset(&kmask, umask)) + return -EFAULT; + + set_restore_sigmask(); + current->saved_sigmask = current->blocked; + set_current_blocked(&kmask); + + return 0; +} +#endif + +/** + * sys_rt_sigprocmask - change the list of currently blocked signals + * @how: whether to add, remove, or set signals + * @nset: stores pending signals + * @oset: previous value of signal mask if non-null + * @sigsetsize: size of sigset_t type + */ +SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset, + sigset_t __user *, oset, size_t, sigsetsize) +{ + sigset_t old_set, new_set; + int error; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + old_set = current->blocked; + + if (nset) + { + if (copy_from_user(&new_set, nset, sizeof(sigset_t))) + return -EFAULT; + sigdelsetmask(&new_set, sigmask(SIGKILL) | sigmask(SIGSTOP)); + + error = sigprocmask(how, &new_set, NULL); + if (error) + return error; + } + + if (oset) + { + if (copy_to_user(oset, &old_set, sizeof(sigset_t))) + return -EFAULT; + } + + return 0; +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, + compat_sigset_t __user *, oset, compat_size_t, sigsetsize) +{ + sigset_t old_set = current->blocked; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (nset) + { + sigset_t new_set; + int error; + if (get_compat_sigset(&new_set, nset)) + return -EFAULT; + sigdelsetmask(&new_set, sigmask(SIGKILL) | sigmask(SIGSTOP)); + + error = sigprocmask(how, &new_set, NULL); + if (error) + return error; + } + return oset ? put_compat_sigset(oset, &old_set, sizeof(*oset)) : 0; +} +#endif + +static void do_sigpending(sigset_t *set) +{ + spin_lock_irq(¤t->sighand->siglock); + sigorsets(set, ¤t->pending.signal, + ¤t->signal->shared_pending.signal); + spin_unlock_irq(¤t->sighand->siglock); + + /* Outside the lock because only this thread touches it. */ + sigandsets(set, ¤t->blocked, set); +} + +/** + * sys_rt_sigpending - examine a pending signal that has been raised + * while blocked + * @uset: stores pending signals + * @sigsetsize: size of sigset_t type or larger + */ +SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize) +{ + sigset_t set; + + if (sigsetsize > sizeof(*uset)) + return -EINVAL; + + do_sigpending(&set); + + if (copy_to_user(uset, &set, sigsetsize)) + return -EFAULT; + + return 0; +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset, + compat_size_t, sigsetsize) +{ + sigset_t set; + + if (sigsetsize > sizeof(*uset)) + return -EINVAL; + + do_sigpending(&set); + + return put_compat_sigset(uset, &set, sigsetsize); +} +#endif + +static const struct +{ + unsigned char limit, layout; +} sig_sicodes[] = { + [SIGILL] = {NSIGILL, SIL_FAULT}, + [SIGFPE] = {NSIGFPE, SIL_FAULT}, + [SIGSEGV] = {NSIGSEGV, SIL_FAULT}, + [SIGBUS] = {NSIGBUS, SIL_FAULT}, + [SIGTRAP] = {NSIGTRAP, SIL_FAULT}, +#if defined(SIGEMT) + [SIGEMT] = {NSIGEMT, SIL_FAULT}, +#endif + [SIGCHLD] = {NSIGCHLD, SIL_CHLD}, + [SIGPOLL] = {NSIGPOLL, SIL_POLL}, + [SIGSYS] = {NSIGSYS, SIL_SYS}, +}; + +static bool known_siginfo_layout(unsigned sig, int si_code) +{ + if (si_code == SI_KERNEL) + return true; + else if ((si_code > SI_USER)) + { + if (sig_specific_sicodes(sig)) + { + if (si_code <= sig_sicodes[sig].limit) + return true; + } + else if (si_code <= NSIGPOLL) + return true; + } + else if (si_code >= SI_DETHREAD) + return true; + else if (si_code == SI_ASYNCNL) + return true; + return false; +} + +enum siginfo_layout siginfo_layout(unsigned sig, int si_code) +{ + enum siginfo_layout layout = SIL_KILL; + if ((si_code > SI_USER) && (si_code < SI_KERNEL)) + { + if ((sig < ARRAY_SIZE(sig_sicodes)) && + (si_code <= sig_sicodes[sig].limit)) + { + layout = sig_sicodes[sig].layout; + /* Handle the exceptions */ + if ((sig == SIGBUS) && + (si_code >= BUS_MCEERR_AR) && (si_code <= BUS_MCEERR_AO)) + layout = SIL_FAULT_MCEERR; + else if ((sig == SIGSEGV) && (si_code == SEGV_BNDERR)) + layout = SIL_FAULT_BNDERR; +#ifdef SEGV_PKUERR + else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR)) + layout = SIL_FAULT_PKUERR; +#endif + else if ((sig == SIGTRAP) && (si_code == TRAP_PERF)) + layout = SIL_FAULT_PERF_EVENT; + else if (IS_ENABLED(CONFIG_SPARC) && + (sig == SIGILL) && (si_code == ILL_ILLTRP)) + layout = SIL_FAULT_TRAPNO; + else if (IS_ENABLED(CONFIG_ALPHA) && + ((sig == SIGFPE) || + ((sig == SIGTRAP) && (si_code == TRAP_UNK)))) + layout = SIL_FAULT_TRAPNO; + } + else if (si_code <= NSIGPOLL) + layout = SIL_POLL; + } + else + { + if (si_code == SI_TIMER) + layout = SIL_TIMER; + else if (si_code == SI_SIGIO) + layout = SIL_POLL; + else if (si_code < 0) + layout = SIL_RT; + } + return layout; +} + +static inline char __user *si_expansion(const siginfo_t __user *info) +{ + return ((char __user *)info) + sizeof(struct kernel_siginfo); +} + +int copy_siginfo_to_user(siginfo_t __user *to, const kernel_siginfo_t *from) +{ + char __user *expansion = si_expansion(to); + if (copy_to_user(to, from, sizeof(struct kernel_siginfo))) + return -EFAULT; + if (clear_user(expansion, SI_EXPANSION_SIZE)) + return -EFAULT; + return 0; +} + +static int post_copy_siginfo_from_user(kernel_siginfo_t *info, + const siginfo_t __user *from) +{ + if (unlikely(!known_siginfo_layout(info->si_signo, info->si_code))) + { + char __user *expansion = si_expansion(from); + char buf[SI_EXPANSION_SIZE]; + int i; + /* + * An unknown si_code might need more than + * sizeof(struct kernel_siginfo) bytes. Verify all of the + * extra bytes are 0. This guarantees copy_siginfo_to_user + * will return this data to userspace exactly. + */ + if (copy_from_user(&buf, expansion, SI_EXPANSION_SIZE)) + return -EFAULT; + for (i = 0; i < SI_EXPANSION_SIZE; i++) + { + if (buf[i] != 0) + return -E2BIG; + } + } + return 0; +} + +static int __copy_siginfo_from_user(int signo, kernel_siginfo_t *to, + const siginfo_t __user *from) +{ + if (copy_from_user(to, from, sizeof(struct kernel_siginfo))) + return -EFAULT; + to->si_signo = signo; + return post_copy_siginfo_from_user(to, from); +} + +int copy_siginfo_from_user(kernel_siginfo_t *to, const siginfo_t __user *from) +{ + if (copy_from_user(to, from, sizeof(struct kernel_siginfo))) + return -EFAULT; + return post_copy_siginfo_from_user(to, from); +} + +#ifdef CONFIG_COMPAT +/** + * copy_siginfo_to_external32 - copy a kernel siginfo into a compat user siginfo + * @to: compat siginfo destination + * @from: kernel siginfo source + * + * Note: This function does not work properly for the SIGCHLD on x32, but + * fortunately it doesn't have to. The only valid callers for this function are + * copy_siginfo_to_user32, which is overriden for x32 and the coredump code. + * The latter does not care because SIGCHLD will never cause a coredump. + */ +void copy_siginfo_to_external32(struct compat_siginfo *to, + const struct kernel_siginfo *from) +{ + memset(to, 0, sizeof(*to)); + + to->si_signo = from->si_signo; + to->si_errno = from->si_errno; + to->si_code = from->si_code; + switch (siginfo_layout(from->si_signo, from->si_code)) + { + case SIL_KILL: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + break; + case SIL_TIMER: + to->si_tid = from->si_tid; + to->si_overrun = from->si_overrun; + to->si_int = from->si_int; + break; + case SIL_POLL: + to->si_band = from->si_band; + to->si_fd = from->si_fd; + break; + case SIL_FAULT: + to->si_addr = ptr_to_compat(from->si_addr); + break; + case SIL_FAULT_TRAPNO: + to->si_addr = ptr_to_compat(from->si_addr); + to->si_trapno = from->si_trapno; + break; + case SIL_FAULT_MCEERR: + to->si_addr = ptr_to_compat(from->si_addr); + to->si_addr_lsb = from->si_addr_lsb; + break; + case SIL_FAULT_BNDERR: + to->si_addr = ptr_to_compat(from->si_addr); + to->si_lower = ptr_to_compat(from->si_lower); + to->si_upper = ptr_to_compat(from->si_upper); + break; + case SIL_FAULT_PKUERR: + to->si_addr = ptr_to_compat(from->si_addr); + to->si_pkey = from->si_pkey; + break; + case SIL_FAULT_PERF_EVENT: + to->si_addr = ptr_to_compat(from->si_addr); + to->si_perf_data = from->si_perf_data; + to->si_perf_type = from->si_perf_type; + break; + case SIL_CHLD: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + to->si_status = from->si_status; + to->si_utime = from->si_utime; + to->si_stime = from->si_stime; + break; + case SIL_RT: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + to->si_int = from->si_int; + break; + case SIL_SYS: + to->si_call_addr = ptr_to_compat(from->si_call_addr); + to->si_syscall = from->si_syscall; + to->si_arch = from->si_arch; + break; + } +} + +int __copy_siginfo_to_user32(struct compat_siginfo __user *to, + const struct kernel_siginfo *from) +{ + struct compat_siginfo new; + + copy_siginfo_to_external32(&new, from); + if (copy_to_user(to, &new, sizeof(struct compat_siginfo))) + return -EFAULT; + return 0; +} + +static int post_copy_siginfo_from_user32(kernel_siginfo_t *to, + const struct compat_siginfo *from) +{ + clear_siginfo(to); + to->si_signo = from->si_signo; + to->si_errno = from->si_errno; + to->si_code = from->si_code; + switch (siginfo_layout(from->si_signo, from->si_code)) + { + case SIL_KILL: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + break; + case SIL_TIMER: + to->si_tid = from->si_tid; + to->si_overrun = from->si_overrun; + to->si_int = from->si_int; + break; + case SIL_POLL: + to->si_band = from->si_band; + to->si_fd = from->si_fd; + break; + case SIL_FAULT: + to->si_addr = compat_ptr(from->si_addr); + break; + case SIL_FAULT_TRAPNO: + to->si_addr = compat_ptr(from->si_addr); + to->si_trapno = from->si_trapno; + break; + case SIL_FAULT_MCEERR: + to->si_addr = compat_ptr(from->si_addr); + to->si_addr_lsb = from->si_addr_lsb; + break; + case SIL_FAULT_BNDERR: + to->si_addr = compat_ptr(from->si_addr); + to->si_lower = compat_ptr(from->si_lower); + to->si_upper = compat_ptr(from->si_upper); + break; + case SIL_FAULT_PKUERR: + to->si_addr = compat_ptr(from->si_addr); + to->si_pkey = from->si_pkey; + break; + case SIL_FAULT_PERF_EVENT: + to->si_addr = compat_ptr(from->si_addr); + to->si_perf_data = from->si_perf_data; + to->si_perf_type = from->si_perf_type; + break; + case SIL_CHLD: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + to->si_status = from->si_status; +#ifdef CONFIG_X86_X32_ABI + if (in_x32_syscall()) + { + to->si_utime = from->_sifields._sigchld_x32._utime; + to->si_stime = from->_sifields._sigchld_x32._stime; + } + else +#endif + { + to->si_utime = from->si_utime; + to->si_stime = from->si_stime; + } + break; + case SIL_RT: + to->si_pid = from->si_pid; + to->si_uid = from->si_uid; + to->si_int = from->si_int; + break; + case SIL_SYS: + to->si_call_addr = compat_ptr(from->si_call_addr); + to->si_syscall = from->si_syscall; + to->si_arch = from->si_arch; + break; + } + return 0; +} + +static int __copy_siginfo_from_user32(int signo, struct kernel_siginfo *to, + const struct compat_siginfo __user *ufrom) +{ + struct compat_siginfo from; + + if (copy_from_user(&from, ufrom, sizeof(struct compat_siginfo))) + return -EFAULT; + + from.si_signo = signo; + return post_copy_siginfo_from_user32(to, &from); +} + +int copy_siginfo_from_user32(struct kernel_siginfo *to, + const struct compat_siginfo __user *ufrom) +{ + struct compat_siginfo from; + + if (copy_from_user(&from, ufrom, sizeof(struct compat_siginfo))) + return -EFAULT; + + return post_copy_siginfo_from_user32(to, &from); +} +#endif /* CONFIG_COMPAT */ + +/** + * do_sigtimedwait - wait for queued signals specified in @which + * @which: queued signals to wait for + * @info: if non-null, the signal's siginfo is returned here + * @ts: upper bound on process time suspension + */ +static int do_sigtimedwait(const sigset_t *which, kernel_siginfo_t *info, + const struct timespec64 *ts) +{ + ktime_t *to = NULL, timeout = KTIME_MAX; + struct task_struct *tsk = current; + sigset_t mask = *which; + int sig, ret = 0; + + if (ts) + { + if (!timespec64_valid(ts)) + return -EINVAL; + timeout = timespec64_to_ktime(*ts); + to = &timeout; + } + + /* + * Invert the set of allowed signals to get those we want to block. + */ + sigdelsetmask(&mask, sigmask(SIGKILL) | sigmask(SIGSTOP)); + signotset(&mask); + + spin_lock_irq(&tsk->sighand->siglock); + sig = dequeue_signal(tsk, &mask, info); + if (!sig && timeout) + { + /* + * None ready, temporarily unblock those we're interested + * while we are sleeping in so that we'll be awakened when + * they arrive. Unblocking is always fine, we can avoid + * set_current_blocked(). + */ + tsk->real_blocked = tsk->blocked; + sigandsets(&tsk->blocked, &tsk->blocked, &mask); + recalc_sigpending(); + spin_unlock_irq(&tsk->sighand->siglock); + + __set_current_state(TASK_INTERRUPTIBLE); + ret = freezable_schedule_hrtimeout_range(to, tsk->timer_slack_ns, + HRTIMER_MODE_REL); + spin_lock_irq(&tsk->sighand->siglock); + __set_task_blocked(tsk, &tsk->real_blocked); + sigemptyset(&tsk->real_blocked); + sig = dequeue_signal(tsk, &mask, info); + } + spin_unlock_irq(&tsk->sighand->siglock); + + if (sig) + return sig; + return ret ? -EINTR : -EAGAIN; +} + +/** + * sys_rt_sigtimedwait - synchronously wait for queued signals specified + * in @uthese + * @uthese: queued signals to wait for + * @uinfo: if non-null, the signal's siginfo is returned here + * @uts: upper bound on process time suspension + * @sigsetsize: size of sigset_t type + */ +SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese, + siginfo_t __user *, uinfo, + const struct __kernel_timespec __user *, uts, + size_t, sigsetsize) +{ + sigset_t these; + struct timespec64 ts; + kernel_siginfo_t info; + int ret; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&these, uthese, sizeof(these))) + return -EFAULT; + + if (uts) + { + if (get_timespec64(&ts, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&these, &info, uts ? &ts : NULL); + + if (ret > 0 && uinfo) + { + if (copy_siginfo_to_user(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} + +#ifdef CONFIG_COMPAT_32BIT_TIME +SYSCALL_DEFINE4(rt_sigtimedwait_time32, const sigset_t __user *, uthese, + siginfo_t __user *, uinfo, + const struct old_timespec32 __user *, uts, + size_t, sigsetsize) +{ + sigset_t these; + struct timespec64 ts; + kernel_siginfo_t info; + int ret; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&these, uthese, sizeof(these))) + return -EFAULT; + + if (uts) + { + if (get_old_timespec32(&ts, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&these, &info, uts ? &ts : NULL); + + if (ret > 0 && uinfo) + { + if (copy_siginfo_to_user(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} +#endif + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait_time64, compat_sigset_t __user *, uthese, + struct compat_siginfo __user *, uinfo, + struct __kernel_timespec __user *, uts, compat_size_t, sigsetsize) +{ + sigset_t s; + struct timespec64 t; + kernel_siginfo_t info; + long ret; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (get_compat_sigset(&s, uthese)) + return -EFAULT; + + if (uts) + { + if (get_timespec64(&t, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); + + if (ret > 0 && uinfo) + { + if (copy_siginfo_to_user32(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} + +#ifdef CONFIG_COMPAT_32BIT_TIME +COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait_time32, compat_sigset_t __user *, uthese, + struct compat_siginfo __user *, uinfo, + struct old_timespec32 __user *, uts, compat_size_t, sigsetsize) +{ + sigset_t s; + struct timespec64 t; + kernel_siginfo_t info; + long ret; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (get_compat_sigset(&s, uthese)) + return -EFAULT; + + if (uts) + { + if (get_old_timespec32(&t, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); + + if (ret > 0 && uinfo) + { + if (copy_siginfo_to_user32(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} +#endif +#endif + +static inline void prepare_kill_siginfo(int sig, struct kernel_siginfo *info) +{ + clear_siginfo(info); + info->si_signo = sig; + info->si_errno = 0; + info->si_code = SI_USER; + info->si_pid = task_tgid_vnr(current); + info->si_uid = from_kuid_munged(current_user_ns(), current_uid()); +} + +/** + * sys_kill - send a signal to a process + * @pid: the PID of the process + * @sig: signal to be sent + */ +SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) +{ + struct kernel_siginfo info; + + prepare_kill_siginfo(sig, &info); + + return kill_something_info(sig, &info, pid); +} + +/* + * Verify that the signaler and signalee either are in the same pid namespace + * or that the signaler's pid namespace is an ancestor of the signalee's pid + * namespace. + */ +static bool access_pidfd_pidns(struct pid *pid) +{ + struct pid_namespace *active = task_active_pid_ns(current); + struct pid_namespace *p = ns_of_pid(pid); + + for (;;) + { + if (!p) + return false; + if (p == active) + break; + p = p->parent; + } + + return true; +} + +static int copy_siginfo_from_user_any(kernel_siginfo_t *kinfo, + siginfo_t __user *info) +{ +#ifdef CONFIG_COMPAT + /* + * Avoid hooking up compat syscalls and instead handle necessary + * conversions here. Note, this is a stop-gap measure and should not be + * considered a generic solution. + */ + if (in_compat_syscall()) + return copy_siginfo_from_user32( + kinfo, (struct compat_siginfo __user *)info); +#endif + return copy_siginfo_from_user(kinfo, info); +} + +static struct pid *pidfd_to_pid(const struct file *file) +{ + struct pid *pid; + + pid = pidfd_pid(file); + if (!IS_ERR(pid)) + return pid; + + return tgid_pidfd_to_pid(file); +} + +/** + * sys_pidfd_send_signal - Signal a process through a pidfd + * @pidfd: file descriptor of the process + * @sig: signal to send + * @info: signal info + * @flags: future flags + * + * The syscall currently only signals via PIDTYPE_PID which covers + * kill(, . It does not signal threads or process + * groups. + * In order to extend the syscall to threads and process groups the @flags + * argument should be used. In essence, the @flags argument will determine + * what is signaled and not the file descriptor itself. Put in other words, + * grouping is a property of the flags argument not a property of the file + * descriptor. + * + * Return: 0 on success, negative errno on failure + */ +SYSCALL_DEFINE4(pidfd_send_signal, int, pidfd, int, sig, + siginfo_t __user *, info, unsigned int, flags) +{ + int ret; + struct fd f; + struct pid *pid; + kernel_siginfo_t kinfo; + + /* Enforce flags be set to 0 until we add an extension. */ + if (flags) + return -EINVAL; + + f = fdget(pidfd); + if (!f.file) + return -EBADF; + + /* Is this a pidfd? */ + pid = pidfd_to_pid(f.file); + if (IS_ERR(pid)) + { + ret = PTR_ERR(pid); + goto err; + } + + ret = -EINVAL; + if (!access_pidfd_pidns(pid)) + goto err; + + if (info) + { + ret = copy_siginfo_from_user_any(&kinfo, info); + if (unlikely(ret)) + goto err; + + ret = -EINVAL; + if (unlikely(sig != kinfo.si_signo)) + goto err; + + /* Only allow sending arbitrary signals to yourself. */ + ret = -EPERM; + if ((task_pid(current) != pid) && + (kinfo.si_code >= 0 || kinfo.si_code == SI_TKILL)) + goto err; + } + else + { + prepare_kill_siginfo(sig, &kinfo); + } + + ret = kill_pid_info(sig, &kinfo, pid); + +err: + fdput(f); + return ret; +} + +static int +do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info) +{ + struct task_struct *p; + int error = -ESRCH; + + rcu_read_lock(); + p = find_task_by_vpid(pid); + if (p && (tgid <= 0 || task_tgid_vnr(p) == tgid)) + { + error = check_kill_permission(sig, info, p); + /* + * The null signal is a permissions and process existence + * probe. No signal is actually delivered. + */ + if (!error && sig) + { + error = do_send_sig_info(sig, info, p, PIDTYPE_PID); + /* + * If lock_task_sighand() failed we pretend the task + * dies after receiving the signal. The window is tiny, + * and the signal is private anyway. + */ + if (unlikely(error == -ESRCH)) + error = 0; + } + } + rcu_read_unlock(); + + return error; +} + +static int do_tkill(pid_t tgid, pid_t pid, int sig) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = SI_TKILL; + info.si_pid = task_tgid_vnr(current); + info.si_uid = from_kuid_munged(current_user_ns(), current_uid()); + + return do_send_specific(tgid, pid, sig, &info); +} + +/** + * sys_tgkill - send signal to one specific thread + * @tgid: the thread group ID of the thread + * @pid: the PID of the thread + * @sig: signal to be sent + * + * This syscall also checks the @tgid and returns -ESRCH even if the PID + * exists but it's not belonging to the target process anymore. This + * method solves the problem of threads exiting and PIDs getting reused. + */ +SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) +{ + /* This is only valid for single tasks */ + if (pid <= 0 || tgid <= 0) + return -EINVAL; + + return do_tkill(tgid, pid, sig); +} + +/** + * sys_tkill - send signal to one specific task + * @pid: the PID of the task + * @sig: signal to be sent + * + * Send a signal to only one task, even if it's a CLONE_THREAD task. + */ +SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) +{ + /* This is only valid for single tasks */ + if (pid <= 0) + return -EINVAL; + + return do_tkill(0, pid, sig); +} + +static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info) +{ + /* Not even root can pretend to send signals from the kernel. + * Nor can they impersonate a kill()/tgkill(), which adds source info. + */ + if ((info->si_code >= 0 || info->si_code == SI_TKILL) && + (task_pid_vnr(current) != pid)) + return -EPERM; + + /* POSIX.1b doesn't mention process groups. */ + return kill_proc_info(sig, info, pid); +} + +/** + * sys_rt_sigqueueinfo - send signal information to a signal + * @pid: the PID of the thread + * @sig: signal to be sent + * @uinfo: signal info to be sent + */ +SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, + siginfo_t __user *, uinfo) +{ + kernel_siginfo_t info; + int ret = __copy_siginfo_from_user(sig, &info, uinfo); + if (unlikely(ret)) + return ret; + return do_rt_sigqueueinfo(pid, sig, &info); +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo, + compat_pid_t, pid, + int, sig, + struct compat_siginfo __user *, uinfo) +{ + kernel_siginfo_t info; + int ret = __copy_siginfo_from_user32(sig, &info, uinfo); + if (unlikely(ret)) + return ret; + return do_rt_sigqueueinfo(pid, sig, &info); +} +#endif + +static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info) +{ + /* This is only valid for single tasks */ + if (pid <= 0 || tgid <= 0) + return -EINVAL; + + /* Not even root can pretend to send signals from the kernel. + * Nor can they impersonate a kill()/tgkill(), which adds source info. + */ + if ((info->si_code >= 0 || info->si_code == SI_TKILL) && + (task_pid_vnr(current) != pid)) + return -EPERM; + + return do_send_specific(tgid, pid, sig, info); +} + +SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, + siginfo_t __user *, uinfo) +{ + kernel_siginfo_t info; + int ret = __copy_siginfo_from_user(sig, &info, uinfo); + if (unlikely(ret)) + return ret; + return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_tgsigqueueinfo, + compat_pid_t, tgid, + compat_pid_t, pid, + int, sig, + struct compat_siginfo __user *, uinfo) +{ + kernel_siginfo_t info; + int ret = __copy_siginfo_from_user32(sig, &info, uinfo); + if (unlikely(ret)) + return ret; + return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); +} +#endif + +/* + * For kthreads only, must not be used if cloned with CLONE_SIGHAND + */ +void kernel_sigaction(int sig, __sighandler_t action) +{ + spin_lock_irq(¤t->sighand->siglock); + current->sighand->action[sig - 1].sa.sa_handler = action; + if (action == SIG_IGN) + { + sigset_t mask; + + sigemptyset(&mask); + sigaddset(&mask, sig); + + flush_sigqueue_mask(&mask, ¤t->signal->shared_pending); + flush_sigqueue_mask(&mask, ¤t->pending); + recalc_sigpending(); + } + spin_unlock_irq(¤t->sighand->siglock); +} +EXPORT_SYMBOL(kernel_sigaction); + +void __weak sigaction_compat_abi(struct k_sigaction *act, + struct k_sigaction *oact) +{ +} + +int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) +{ + struct task_struct *p = current, *t; + struct k_sigaction *k; + sigset_t mask; + + if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig))) + return -EINVAL; + + k = &p->sighand->action[sig - 1]; + + spin_lock_irq(&p->sighand->siglock); + if (k->sa.sa_flags & SA_IMMUTABLE) + { + spin_unlock_irq(&p->sighand->siglock); + return -EINVAL; + } + if (oact) + *oact = *k; + + /* + * Make sure that we never accidentally claim to support SA_UNSUPPORTED, + * e.g. by having an architecture use the bit in their uapi. + */ + BUILD_BUG_ON(UAPI_SA_FLAGS & SA_UNSUPPORTED); + + /* + * Clear unknown flag bits in order to allow userspace to detect missing + * support for flag bits and to allow the kernel to use non-uapi bits + * internally. + */ + if (act) + act->sa.sa_flags &= UAPI_SA_FLAGS; + if (oact) + oact->sa.sa_flags &= UAPI_SA_FLAGS; + + sigaction_compat_abi(act, oact); + + if (act) + { + sigdelsetmask(&act->sa.sa_mask, + sigmask(SIGKILL) | sigmask(SIGSTOP)); + *k = *act; + /* + * POSIX 3.3.1.3: + * "Setting a signal action to SIG_IGN for a signal that is + * pending shall cause the pending signal to be discarded, + * whether or not it is blocked." + * + * "Setting a signal action to SIG_DFL for a signal that is + * pending and whose default action is to ignore the signal + * (for example, SIGCHLD), shall cause the pending signal to + * be discarded, whether or not it is blocked" + */ + if (sig_handler_ignored(sig_handler(p, sig), sig)) + { + sigemptyset(&mask); + sigaddset(&mask, sig); + flush_sigqueue_mask(&mask, &p->signal->shared_pending); + for_each_thread(p, t) + flush_sigqueue_mask(&mask, &t->pending); + } + } + + spin_unlock_irq(&p->sighand->siglock); + return 0; +} + +#ifdef CONFIG_DYNAMIC_SIGFRAME +static inline void sigaltstack_lock(void) + __acquires(¤t->sighand->siglock) +{ + spin_lock_irq(¤t->sighand->siglock); +} + +static inline void sigaltstack_unlock(void) + __releases(¤t->sighand->siglock) +{ + spin_unlock_irq(¤t->sighand->siglock); +} +#else +static inline void sigaltstack_lock(void) +{ +} +static inline void sigaltstack_unlock(void) {} +#endif + +static int +do_sigaltstack(const stack_t *ss, stack_t *oss, unsigned long sp, + size_t min_ss_size) +{ + struct task_struct *t = current; + int ret = 0; + + if (oss) + { + memset(oss, 0, sizeof(stack_t)); + oss->ss_sp = (void __user *)t->sas_ss_sp; + oss->ss_size = t->sas_ss_size; + oss->ss_flags = sas_ss_flags(sp) | + (current->sas_ss_flags & SS_FLAG_BITS); + } + + if (ss) + { + void __user *ss_sp = ss->ss_sp; + size_t ss_size = ss->ss_size; + unsigned ss_flags = ss->ss_flags; + int ss_mode; + + if (unlikely(on_sig_stack(sp))) + return -EPERM; + + ss_mode = ss_flags & ~SS_FLAG_BITS; + if (unlikely(ss_mode != SS_DISABLE && ss_mode != SS_ONSTACK && + ss_mode != 0)) + return -EINVAL; + + sigaltstack_lock(); + if (ss_mode == SS_DISABLE) + { + ss_size = 0; + ss_sp = NULL; + } + else + { + if (unlikely(ss_size < min_ss_size)) + ret = -ENOMEM; + if (!sigaltstack_size_valid(ss_size)) + ret = -ENOMEM; + } + if (!ret) + { + t->sas_ss_sp = (unsigned long)ss_sp; + t->sas_ss_size = ss_size; + t->sas_ss_flags = ss_flags; + } + sigaltstack_unlock(); + } + return ret; +} + +SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss, stack_t __user *, uoss) +{ + stack_t new, old; + int err; + if (uss && copy_from_user(&new, uss, sizeof(stack_t))) + return -EFAULT; + err = do_sigaltstack(uss ? &new : NULL, uoss ? &old : NULL, + current_user_stack_pointer(), + MINSIGSTKSZ); + if (!err && uoss && copy_to_user(uoss, &old, sizeof(stack_t))) + err = -EFAULT; + return err; +} + +int restore_altstack(const stack_t __user *uss) +{ + stack_t new; + if (copy_from_user(&new, uss, sizeof(stack_t))) + return -EFAULT; + (void)do_sigaltstack(&new, NULL, current_user_stack_pointer(), + MINSIGSTKSZ); + /* squash all but EFAULT for now */ + return 0; +} + +int __save_altstack(stack_t __user *uss, unsigned long sp) +{ + struct task_struct *t = current; + int err = __put_user((void __user *)t->sas_ss_sp, &uss->ss_sp) | + __put_user(t->sas_ss_flags, &uss->ss_flags) | + __put_user(t->sas_ss_size, &uss->ss_size); + return err; +} + +#ifdef CONFIG_COMPAT +static int do_compat_sigaltstack(const compat_stack_t __user *uss_ptr, + compat_stack_t __user *uoss_ptr) +{ + stack_t uss, uoss; + int ret; + + if (uss_ptr) + { + compat_stack_t uss32; + if (copy_from_user(&uss32, uss_ptr, sizeof(compat_stack_t))) + return -EFAULT; + uss.ss_sp = compat_ptr(uss32.ss_sp); + uss.ss_flags = uss32.ss_flags; + uss.ss_size = uss32.ss_size; + } + ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, + compat_user_stack_pointer(), + COMPAT_MINSIGSTKSZ); + if (ret >= 0 && uoss_ptr) + { + compat_stack_t old; + memset(&old, 0, sizeof(old)); + old.ss_sp = ptr_to_compat(uoss.ss_sp); + old.ss_flags = uoss.ss_flags; + old.ss_size = uoss.ss_size; + if (copy_to_user(uoss_ptr, &old, sizeof(compat_stack_t))) + ret = -EFAULT; + } + return ret; +} + +COMPAT_SYSCALL_DEFINE2(sigaltstack, + const compat_stack_t __user *, uss_ptr, + compat_stack_t __user *, uoss_ptr) +{ + return do_compat_sigaltstack(uss_ptr, uoss_ptr); +} + +int compat_restore_altstack(const compat_stack_t __user *uss) +{ + int err = do_compat_sigaltstack(uss, NULL); + /* squash all but -EFAULT for now */ + return err == -EFAULT ? err : 0; +} + +int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp) +{ + int err; + struct task_struct *t = current; + err = __put_user(ptr_to_compat((void __user *)t->sas_ss_sp), + &uss->ss_sp) | + __put_user(t->sas_ss_flags, &uss->ss_flags) | + __put_user(t->sas_ss_size, &uss->ss_size); + return err; +} +#endif + +#ifdef __ARCH_WANT_SYS_SIGPENDING + +/** + * sys_sigpending - examine pending signals + * @uset: where mask of pending signal is returned + */ +SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, uset) +{ + sigset_t set; + + if (sizeof(old_sigset_t) > sizeof(*uset)) + return -EINVAL; + + do_sigpending(&set); + + if (copy_to_user(uset, &set, sizeof(old_sigset_t))) + return -EFAULT; + + return 0; +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set32) +{ + sigset_t set; + + do_sigpending(&set); + + return put_user(set.sig[0], set32); +} +#endif + +#endif + +#ifdef __ARCH_WANT_SYS_SIGPROCMASK +/** + * sys_sigprocmask - examine and change blocked signals + * @how: whether to add, remove, or set signals + * @nset: signals to add or remove (if non-null) + * @oset: previous value of signal mask if non-null + * + * Some platforms have their own version with special arguments; + * others support only sys_rt_sigprocmask. + */ + +SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset, + old_sigset_t __user *, oset) +{ + old_sigset_t old_set, new_set; + sigset_t new_blocked; + + old_set = current->blocked.sig[0]; + + if (nset) + { + if (copy_from_user(&new_set, nset, sizeof(*nset))) + return -EFAULT; + + new_blocked = current->blocked; + + switch (how) + { + case SIG_BLOCK: + sigaddsetmask(&new_blocked, new_set); + break; + case SIG_UNBLOCK: + sigdelsetmask(&new_blocked, new_set); + break; + case SIG_SETMASK: + new_blocked.sig[0] = new_set; + break; + default: + return -EINVAL; + } + + set_current_blocked(&new_blocked); + } + + if (oset) + { + if (copy_to_user(oset, &old_set, sizeof(*oset))) + return -EFAULT; + } + + return 0; +} +#endif /* __ARCH_WANT_SYS_SIGPROCMASK */ + +#ifndef CONFIG_ODD_RT_SIGACTION +/** + * sys_rt_sigaction - alter an action taken by a process + * @sig: signal to be sent + * @act: new sigaction + * @oact: used to save the previous sigaction + * @sigsetsize: size of sigset_t type + */ +SYSCALL_DEFINE4(rt_sigaction, int, sig, + const struct sigaction __user *, act, + struct sigaction __user *, oact, + size_t, sigsetsize) +{ + struct k_sigaction new_sa, old_sa; + int ret; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (act && copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa))) + return -EFAULT; + + ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); + if (ret) + return ret; + + if (oact && copy_to_user(oact, &old_sa.sa, sizeof(old_sa.sa))) + return -EFAULT; + + return 0; +} +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, + const struct compat_sigaction __user *, act, + struct compat_sigaction __user *, oact, + compat_size_t, sigsetsize) +{ + struct k_sigaction new_ka, old_ka; +#ifdef __ARCH_HAS_SA_RESTORER + compat_uptr_t restorer; +#endif + int ret; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + + if (act) + { + compat_uptr_t handler; + ret = get_user(handler, &act->sa_handler); + new_ka.sa.sa_handler = compat_ptr(handler); +#ifdef __ARCH_HAS_SA_RESTORER + ret |= get_user(restorer, &act->sa_restorer); + new_ka.sa.sa_restorer = compat_ptr(restorer); +#endif + ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask); + ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags); + if (ret) + return -EFAULT; + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + if (!ret && oact) + { + ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), + &oact->sa_handler); + ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask, + sizeof(oact->sa_mask)); + ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags); +#ifdef __ARCH_HAS_SA_RESTORER + ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), + &oact->sa_restorer); +#endif + } + return ret; +} +#endif +#endif /* !CONFIG_ODD_RT_SIGACTION */ + +#ifdef CONFIG_OLD_SIGACTION +SYSCALL_DEFINE3(sigaction, int, sig, + const struct old_sigaction __user *, act, + struct old_sigaction __user *, oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) + { + old_sigset_t mask; + if (!access_ok(act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; +#ifdef __ARCH_HAS_KA_RESTORER + new_ka.ka_restorer = NULL; +#endif + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) + { + if (!access_ok(oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + + return ret; +} +#endif +#ifdef CONFIG_COMPAT_OLD_SIGACTION +COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, + const struct compat_old_sigaction __user *, act, + struct compat_old_sigaction __user *, oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + compat_old_sigset_t mask; + compat_uptr_t handler, restorer; + + if (act) + { + if (!access_ok(act, sizeof(*act)) || + __get_user(handler, &act->sa_handler) || + __get_user(restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; + +#ifdef __ARCH_HAS_KA_RESTORER + new_ka.ka_restorer = NULL; +#endif + new_ka.sa.sa_handler = compat_ptr(handler); + new_ka.sa.sa_restorer = compat_ptr(restorer); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) + { + if (!access_ok(oact, sizeof(*oact)) || + __put_user(ptr_to_compat(old_ka.sa.sa_handler), + &oact->sa_handler) || + __put_user(ptr_to_compat(old_ka.sa.sa_restorer), + &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + return ret; +} +#endif + +#ifdef CONFIG_SGETMASK_SYSCALL + +/* + * For backwards compatibility. Functionality superseded by sigprocmask. + */ +SYSCALL_DEFINE0(sgetmask) +{ + /* SMP safe */ + return current->blocked.sig[0]; +} + +SYSCALL_DEFINE1(ssetmask, int, newmask) +{ + int old = current->blocked.sig[0]; + sigset_t newset; + + siginitset(&newset, newmask); + set_current_blocked(&newset); + + return old; +} +#endif /* CONFIG_SGETMASK_SYSCALL */ + +#ifdef __ARCH_WANT_SYS_SIGNAL +/* + * For backwards compatibility. Functionality superseded by sigaction. + */ +SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) +{ + struct k_sigaction new_sa, old_sa; + int ret; + + new_sa.sa.sa_handler = handler; + new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK; + sigemptyset(&new_sa.sa.sa_mask); + + ret = do_sigaction(sig, &new_sa, &old_sa); + + return ret ? ret : (unsigned long)old_sa.sa.sa_handler; +} +#endif /* __ARCH_WANT_SYS_SIGNAL */ + +#ifdef __ARCH_WANT_SYS_PAUSE + +SYSCALL_DEFINE0(pause) +{ + while (!signal_pending(current)) + { + __set_current_state(TASK_INTERRUPTIBLE); + schedule(); + } + return -ERESTARTNOHAND; +} + +#endif + +static int sigsuspend(sigset_t *set) +{ + current->saved_sigmask = current->blocked; + set_current_blocked(set); + + while (!signal_pending(current)) + { + __set_current_state(TASK_INTERRUPTIBLE); + schedule(); + } + set_restore_sigmask(); + return -ERESTARTNOHAND; +} + +/** + * sys_rt_sigsuspend - replace the signal mask for a value with the + * @unewset value until a signal is received + * @unewset: new signal mask value + * @sigsetsize: size of sigset_t type + */ +SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize) +{ + sigset_t newset; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset, unewset, sizeof(newset))) + return -EFAULT; + return sigsuspend(&newset); +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_size_t, sigsetsize) +{ + sigset_t newset; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (get_compat_sigset(&newset, unewset)) + return -EFAULT; + return sigsuspend(&newset); +} +#endif + +#ifdef CONFIG_OLD_SIGSUSPEND +SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask) +{ + sigset_t blocked; + siginitset(&blocked, mask); + return sigsuspend(&blocked); +} +#endif +#ifdef CONFIG_OLD_SIGSUSPEND3 +SYSCALL_DEFINE3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask) +{ + sigset_t blocked; + siginitset(&blocked, mask); + return sigsuspend(&blocked); +} +#endif + +__weak const char *arch_vma_name(struct vm_area_struct *vma) +{ + return NULL; +} + +static inline void siginfo_buildtime_checks(void) +{ + BUILD_BUG_ON(sizeof(struct siginfo) != SI_MAX_SIZE); + + /* Verify the offsets in the two siginfos match */ +#define CHECK_OFFSET(field) \ + BUILD_BUG_ON(offsetof(siginfo_t, field) != offsetof(kernel_siginfo_t, field)) + + /* kill */ + CHECK_OFFSET(si_pid); + CHECK_OFFSET(si_uid); + + /* timer */ + CHECK_OFFSET(si_tid); + CHECK_OFFSET(si_overrun); + CHECK_OFFSET(si_value); + + /* rt */ + CHECK_OFFSET(si_pid); + CHECK_OFFSET(si_uid); + CHECK_OFFSET(si_value); + + /* sigchld */ + CHECK_OFFSET(si_pid); + CHECK_OFFSET(si_uid); + CHECK_OFFSET(si_status); + CHECK_OFFSET(si_utime); + CHECK_OFFSET(si_stime); + + /* sigfault */ + CHECK_OFFSET(si_addr); + CHECK_OFFSET(si_trapno); + CHECK_OFFSET(si_addr_lsb); + CHECK_OFFSET(si_lower); + CHECK_OFFSET(si_upper); + CHECK_OFFSET(si_pkey); + CHECK_OFFSET(si_perf_data); + CHECK_OFFSET(si_perf_type); + + /* sigpoll */ + CHECK_OFFSET(si_band); + CHECK_OFFSET(si_fd); + + /* sigsys */ + CHECK_OFFSET(si_call_addr); + CHECK_OFFSET(si_syscall); + CHECK_OFFSET(si_arch); +#undef CHECK_OFFSET + + /* usb asyncio */ + BUILD_BUG_ON(offsetof(struct siginfo, si_pid) != + offsetof(struct siginfo, si_addr)); + if (sizeof(int) == sizeof(void __user *)) + { + BUILD_BUG_ON(sizeof_field(struct siginfo, si_pid) != + sizeof(void __user *)); + } + else + { + BUILD_BUG_ON((sizeof_field(struct siginfo, si_pid) + + sizeof_field(struct siginfo, si_uid)) != + sizeof(void __user *)); + BUILD_BUG_ON(offsetofend(struct siginfo, si_pid) != + offsetof(struct siginfo, si_uid)); + } +#ifdef CONFIG_COMPAT + BUILD_BUG_ON(offsetof(struct compat_siginfo, si_pid) != + offsetof(struct compat_siginfo, si_addr)); + BUILD_BUG_ON(sizeof_field(struct compat_siginfo, si_pid) != + sizeof(compat_uptr_t)); + BUILD_BUG_ON(sizeof_field(struct compat_siginfo, si_pid) != + sizeof_field(struct siginfo, si_pid)); +#endif +} + +void __init signals_init(void) +{ + siginfo_buildtime_checks(); + + sigqueue_cachep = KMEM_CACHE(sigqueue, SLAB_PANIC | SLAB_ACCOUNT); +} + +#ifdef CONFIG_KGDB_KDB +#include +/* + * kdb_send_sig - Allows kdb to send signals without exposing + * signal internals. This function checks if the required locks are + * available before calling the main signal code, to avoid kdb + * deadlocks. + */ +void kdb_send_sig(struct task_struct *t, int sig) +{ + static struct task_struct *kdb_prev_t; + int new_t, ret; + if (!spin_trylock(&t->sighand->siglock)) + { + kdb_printf("Can't do kill command now.\n" + "The sigmask lock is held somewhere else in " + "kernel, try again later\n"); + return; + } + new_t = kdb_prev_t != t; + kdb_prev_t = t; + if (!task_is_running(t) && new_t) + { + spin_unlock(&t->sighand->siglock); + kdb_printf("Process is not RUNNING, sending a signal from " + "kdb risks deadlock\n" + "on the run queue locks. " + "The signal has _not_ been sent.\n" + "Reissue the kill command if you want to risk " + "the deadlock.\n"); + return; + } + ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID); + spin_unlock(&t->sighand->siglock); + if (ret) + kdb_printf("Fail to deliver Signal %d to process %d.\n", + sig, t->pid); + else + kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid); +} +#endif /* CONFIG_KGDB_KDB */ diff --git a/ableos/src/arch/aarch32/boot.s b/ableos/src/arch/aarch32/boot.s new file mode 100644 index 0000000..6ff3a59 --- /dev/null +++ b/ableos/src/arch/aarch32/boot.s @@ -0,0 +1,52 @@ +// AArch32 mode + +// To keep this in the first portion of the binary. +.section ".text.boot" + +// Make _start global. +.globl _start + + .org 0x8000 +// Entry point for the kernel. +// r15 -> should begin execution at 0x8000. +// r0 -> 0x00000000 +// r1 -> 0x00000C42 - machine id +// r2 -> 0x00000100 - start of ATAGS +// preserve these registers as argument for kernel_main +_start: + // Shut off extra cores + mrc p15, 0, r5, c0, c0, 5 + and r5, r5, #3 + cmp r5, #0 + bne halt + + // Setup the stack. + ldr r5, =_start + mov sp, r5 + + // Clear out bss. + ldr r4, =__bss_start + ldr r9, =__bss_end + mov r5, #0 + mov r6, #0 + mov r7, #0 + mov r8, #0 + b 2f + +1: + // store multiple at r4. + stmia r4!, {r5-r8} + + // If we are still below bss_end, loop. +2: + cmp r4, r9 + blo 1b + + // Call kernel_main + ldr r3, =kernel_main + blx r3 + + // halt +halt: + wfe + b halt diff --git a/ableos/src/arch/aarch32/build.sh b/ableos/src/arch/aarch32/build.sh new file mode 100644 index 0000000..e1cc335 --- /dev/null +++ b/ableos/src/arch/aarch32/build.sh @@ -0,0 +1,7 @@ +arm-none-eabi-gcc -mcpu=cortex-a7 -fpic -ffreestanding -c src/arch/aarch32/boot.s -o boot.o +mv src/main.rs src/main.rs.pass +cargo build --release --target json_targets/aarch32-ableos.json +arm-none-eabi-gcc -T src/arch/aarch32/linker.ld -o ableos.elf -ffreestanding -O2 -nostdlib boot.o \ +target/aarch32-ableos/release/libableos.rlib +mv src/main.rs.pass src/main.rs +rm boot.o diff --git a/ableos/src/arch/aarch32/drivers/graphics.rs b/ableos/src/arch/aarch32/drivers/graphics.rs new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/ableos/src/arch/aarch32/drivers/graphics.rs @@ -0,0 +1 @@ + diff --git a/ableos/src/arch/aarch32/drivers/mod.rs b/ableos/src/arch/aarch32/drivers/mod.rs new file mode 100644 index 0000000..175de44 --- /dev/null +++ b/ableos/src/arch/aarch32/drivers/mod.rs @@ -0,0 +1 @@ +pub mod graphics; diff --git a/ableos/src/arch/aarch32/init.rs b/ableos/src/arch/aarch32/init.rs new file mode 100644 index 0000000..e74274f --- /dev/null +++ b/ableos/src/arch/aarch32/init.rs @@ -0,0 +1,4 @@ +use super::write; +pub fn init() { + write("booted on arm :>\n"); +} diff --git a/ableos/src/arch/aarch32/linker.ld b/ableos/src/arch/aarch32/linker.ld new file mode 100644 index 0000000..1f51675 --- /dev/null +++ b/ableos/src/arch/aarch32/linker.ld @@ -0,0 +1,43 @@ +ENTRY(_start) + +SECTIONS +{ + /* Starts at LOADER_ADDR. */ + . = 0x80000; + __start = .; + __text_start = .; + .text : + { + KEEP(*(.text.boot)) + *(.text) + } + . = ALIGN(4096); /* align to page size */ + __text_end = .; + + __rodata_start = .; + .rodata : + { + *(.rodata) + } + . = ALIGN(4096); /* align to page size */ + __rodata_end = .; + + __data_start = .; + .data : + { + *(.data) + } + . = ALIGN(4096); /* align to page size */ + __data_end = .; + + __bss_start = .; + .bss : + { + bss = .; + *(.bss) + } + . = ALIGN(4096); /* align to page size */ + __bss_end = .; + __bss_size = __bss_end - __bss_start; + __end = .; +} diff --git a/ableos/src/arch/aarch32/mbox.rs b/ableos/src/arch/aarch32/mbox.rs new file mode 100644 index 0000000..46230d8 --- /dev/null +++ b/ableos/src/arch/aarch32/mbox.rs @@ -0,0 +1,2 @@ +const MMIO_BASE: u32 = 0x3F00_0000; +const VIDEOCORE_MBOX: u32 = MMIO_BASE + 0xB880; diff --git a/ableos/src/arch/aarch32/mod.rs b/ableos/src/arch/aarch32/mod.rs new file mode 100644 index 0000000..68809b1 --- /dev/null +++ b/ableos/src/arch/aarch32/mod.rs @@ -0,0 +1,38 @@ +#![allow(warnings)] +pub const ARCH: &'static str = "aarch32"; +use core::intrinsics::{volatile_load, volatile_store}; +pub mod drivers; +pub mod init; +pub mod mbox; +// raspi2 and raspi3 have peripheral base address 0x3F000000, +// b ut raspi1 has peripheral base address 0x20000000. Ensure +// you are using the correct peripheral address for your +// hardware. +const UART_DR: u32 = 0x3F201000; +const UART_FR: u32 = 0x3F201018; +pub fn mmio_write(reg: u32, val: u32) { + unsafe { volatile_store(reg as *mut u32, val) } +} +pub fn mmio_read(reg: u32) -> u32 { + unsafe { volatile_load(reg as *const u32) } +} +pub fn transmit_fifo_full() -> bool { + mmio_read(UART_FR) & (1 << 5) > 0 +} +pub fn receive_fifo_empty() -> bool { + mmio_read(UART_FR) & (1 << 4) > 0 +} +pub fn writec(c: u8) { + while transmit_fifo_full() {} + mmio_write(UART_DR, c as u32); +} +pub fn getc() -> u8 { + while receive_fifo_empty() {} + mmio_read(UART_DR) as u8 +} +pub fn write(msg: &str) { + for c in msg.chars() { + writec(c as u8) + } +} +pub fn shutdown() {} diff --git a/ableos/src/arch/aarch32/run.sh b/ableos/src/arch/aarch32/run.sh new file mode 100644 index 0000000..a30d46c --- /dev/null +++ b/ableos/src/arch/aarch32/run.sh @@ -0,0 +1,3 @@ +sh src/arch/aarch32/build.sh && \ +qemu-system-arm -M raspi2 -kernel ableos.elf --serial stdio && \ +rm ableos.elf diff --git a/ableos/src/arch/aarch64/aarch64-qemu.ld b/ableos/src/arch/aarch64/aarch64-qemu.ld new file mode 100644 index 0000000..66ca0ce --- /dev/null +++ b/ableos/src/arch/aarch64/aarch64-qemu.ld @@ -0,0 +1,14 @@ +ENTRY(_start) +SECTIONS +{ + . = 0x40000000; + .text.boot : { *(.text.boot) } + .text : { *(.text) } + .data : { *(.data) } + .rodata : { *(.rodata) } + .bss : { *(.bss) } + + . = ALIGN(8); + . = . + 0x4000; + LD_STACK_PTR = .; +} diff --git a/ableos/src/arch/aarch64/boot.s b/ableos/src/arch/aarch64/boot.s new file mode 100644 index 0000000..40680ed --- /dev/null +++ b/ableos/src/arch/aarch64/boot.s @@ -0,0 +1,15 @@ +.globl _start +.extern LD_STACK_PTR + +.section ".text.boot" + +_start: + ldr x30, =LD_STACK_PTR + mov sp, x30 + bl not_main + +.equ PSCI_SYSTEM_OFF, 0x84000008 +.globl system_off +system_off: + ldr x0, =PSCI_SYSTEM_OFF + hvc #0 diff --git a/ableos/src/arch/aarch64/drivers/graphics.rs b/ableos/src/arch/aarch64/drivers/graphics.rs new file mode 100644 index 0000000..66ad297 --- /dev/null +++ b/ableos/src/arch/aarch64/drivers/graphics.rs @@ -0,0 +1,31 @@ +use crate::driver_traits::graphics::{Graphics, Point, Rgb}; + +pub struct GraphicsBuffer; + +#[allow(unused)] +impl Graphics for GraphicsBuffer { + fn put_line(coords_start: Point, coords_end: Point, thickness: u32, color: Rgb) { + todo!() + } + fn put_rect(coords_start: Point, coords_end: Point, color: Rgb) { + todo!() + } + fn put_circle(coords: Point, radius: u32) { + todo!() + } + fn put_triangle(coords_1: Point, coords_2: Point, coords_3: Point, thickness: u32, color: Rgb) { + todo!(); + } + fn put_pixel(coords: Point, color: Rgb) { + todo!() + } + fn paint_cursor(coords: Point) { + todo!() + } + fn hide_cursor() {} + fn show_cursor() {} + fn draw() {} + fn clear() { + todo!() + } +} diff --git a/ableos/src/arch/aarch64/drivers/mod.rs b/ableos/src/arch/aarch64/drivers/mod.rs new file mode 100644 index 0000000..ae69ade --- /dev/null +++ b/ableos/src/arch/aarch64/drivers/mod.rs @@ -0,0 +1,2 @@ +pub mod graphics; +pub mod nrf52; diff --git a/ableos/src/arch/aarch64/drivers/nrf52.rs b/ableos/src/arch/aarch64/drivers/nrf52.rs new file mode 100644 index 0000000..1aa8348 --- /dev/null +++ b/ableos/src/arch/aarch64/drivers/nrf52.rs @@ -0,0 +1,73 @@ +#![allow(dead_code)] + +// A not-very-useful abstraction of GPIOs in Rust + +use core::sync::atomic::{AtomicBool, Ordering::SeqCst}; + +/// A struct that represents an nRF52 Pin +pub struct Pin(u8); + +/// A struct that represents P0 of the nRF52 +pub struct Pins { + pub p0_31: Pin, +} + +impl Pins { + /// A function to obtain a Port 0 singleton structure + pub fn take() -> Self { + static TAKEN: AtomicBool = AtomicBool::new(false); + + // Enforce this as a singleton + assert!(!TAKEN.swap(true, SeqCst)); + + Self { p0_31: Pin(31) } + } +} + +/// The level of a GPIO +#[derive(Copy, Clone)] +pub enum Level { + Low, + High, +} + +const REG_P0_PIN_CNF_BASE: *mut u32 = 0x5000_0700 as *mut u32; +const REG_P0_OUT_SET: *mut u32 = 0x5000_0508 as *mut u32; +const REG_P0_OUT_CLR: *mut u32 = 0x5000_050C as *mut u32; + +const PIN_CNF_DIR_OUTPUT: u32 = 0x0000_0001; +const PIN_CNF_INPUT_CONNECT: u32 = 0x0000_0000; +const PIN_CNF_PULL_DISABLED: u32 = 0x0000_0000; +const PIN_CNF_DRIVE_S0S1: u32 = 0x0000_0000; +const PIN_CNF_SENSE_DISABLED: u32 = 0x0000_0000; + +impl Pin { + /// Set a pin to be a push pull output + pub fn set_push_pull_output(&mut self, level: Level) { + // set level + match level { + Level::High => self.set_high(), + Level::Low => self.set_low(), + } + + let set_val = PIN_CNF_DIR_OUTPUT + | PIN_CNF_INPUT_CONNECT + | PIN_CNF_PULL_DISABLED + | PIN_CNF_DRIVE_S0S1 + | PIN_CNF_SENSE_DISABLED; + + unsafe { + core::ptr::write_volatile(REG_P0_PIN_CNF_BASE.offset(self.0 as isize), set_val); + } + } + + /// Set a pin to output level low + pub fn set_low(&mut self) { + unsafe { core::ptr::write_volatile(REG_P0_OUT_SET, 1 << (self.0 as u32)) } + } + + /// Set a pin to output level high + pub fn set_high(&mut self) { + unsafe { core::ptr::write_volatile(REG_P0_OUT_CLR, 1 << (self.0 as u32)) } + } +} diff --git a/ableos/src/arch/aarch64/init.rs b/ableos/src/arch/aarch64/init.rs new file mode 100644 index 0000000..12cd021 --- /dev/null +++ b/ableos/src/arch/aarch64/init.rs @@ -0,0 +1 @@ +pub fn init() {} diff --git a/ableos/src/arch/aarch64/mod.rs b/ableos/src/arch/aarch64/mod.rs new file mode 100644 index 0000000..40f5a8f --- /dev/null +++ b/ableos/src/arch/aarch64/mod.rs @@ -0,0 +1,67 @@ +use core::ptr; + +// mod panic; +pub mod drivers; +pub mod init; + +pub mod serial; +use crate::arch::drivers::nrf52::{Level, Pins}; +use core::ptr::write_volatile; +global_asm!(include_str!("boot.s")); + +fn delay(ticks: usize) { + static mut DUMMY: usize = 0; + + // Reduce the number of iterations when in debug mode + #[cfg(debug_assertions)] + let ticks = ticks / 128; + + for t in 0..ticks { + // Prevent the optimizer from removing this loop + unsafe { + write_volatile(&mut DUMMY, t); + } + } +} +use crate::print; + +#[no_mangle] +pub extern "C" fn not_main() { + const UART0: *mut u8 = 0x0900_0000 as *mut u8; + for byte in b"ableOS Arm 64" { + unsafe { + ptr::write_volatile(UART0, *byte); + } + } + + let gpios = Pins::take(); + let mut led = gpios.p0_31; + + loop { + led.set_high(); + delay(2_000_000); + + led.set_low(); + delay(6_000_000); + } + + led.set_push_pull_output(Level::Low); + crate::kmain::kernel_main(); + + sloop(); +} + +pub fn sloop() -> ! { + loop {} +} +pub fn print() { + for byte in b"ableOS Arm 64" { + const UART0: *mut u8 = 0x0900_0000 as *mut u8; + + unsafe { + ptr::write_volatile(UART0, *byte); + } + } +} + +pub fn shutdown() {} diff --git a/ableos/src/arch/aarch64/run.sh b/ableos/src/arch/aarch64/run.sh new file mode 100644 index 0000000..494f5b8 --- /dev/null +++ b/ableos/src/arch/aarch64/run.sh @@ -0,0 +1,4 @@ +cargo build --target=json_targets/aarch64-ableos.json --release &&\ +qemu-system-aarch64 -machine virt -m 1024M -cpu cortex-a53 \ +-kernel target/aarch64-ableos/release/ableos -serial stdio \ +-device virtio-keyboard diff --git a/ableos/src/arch/aarch64/serial.rs b/ableos/src/arch/aarch64/serial.rs new file mode 100644 index 0000000..98a22e4 --- /dev/null +++ b/ableos/src/arch/aarch64/serial.rs @@ -0,0 +1,12 @@ +#[macro_export] +macro_rules! serial_print { + ($($arg:tt)*) => {}; +} + +/// Prints to the host through the serial interface, appending a newline. +#[macro_export] +macro_rules! serial_println { + () => {}; + ($fmt:expr) => {}; + ($fmt:expr, $($arg:tt)*) => {}; +} diff --git a/ableos/src/arch/ps_portable/drivers/graphics.rs b/ableos/src/arch/ps_portable/drivers/graphics.rs new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/ableos/src/arch/ps_portable/drivers/graphics.rs @@ -0,0 +1 @@ + diff --git a/ableos/src/arch/ps_portable/drivers/mod.rs b/ableos/src/arch/ps_portable/drivers/mod.rs new file mode 100644 index 0000000..175de44 --- /dev/null +++ b/ableos/src/arch/ps_portable/drivers/mod.rs @@ -0,0 +1 @@ +pub mod graphics; diff --git a/ableos/src/arch/ps_portable/init.rs b/ableos/src/arch/ps_portable/init.rs new file mode 100644 index 0000000..8dd6519 --- /dev/null +++ b/ableos/src/arch/ps_portable/init.rs @@ -0,0 +1,2 @@ +use super::*; +pub fn init() {} diff --git a/ableos/src/arch/ps_portable/mod.rs b/ableos/src/arch/ps_portable/mod.rs new file mode 100644 index 0000000..d293b61 --- /dev/null +++ b/ableos/src/arch/ps_portable/mod.rs @@ -0,0 +1,47 @@ +#![no_std] +#![no_main] +pub const ARCH: &'static str = "mipsr4000"; +pub mod drivers; +static mut LIST: psp::Align16<[u32; 0x40000]> = psp::Align16([0; 0x40000]); +// Create a module named "sample_module" with version 1.0 +psp::module!("ableos", 1, 0); +fn psp_main() { + // println!("AbleOS booted on PSP"); + // todo + // println!("{}", crate::experiments::systeminfo::format_system_info()); + // gl_basic(); + println!("{}", crate::time::kilotime::Kilosecond::from_sec(23944)); + let mut second = timer_update().seconds; + loop { + /* + { + let time = timer_update(); + // FIXME: this is a little broken + if (second) == time.seconds { + if second == 59 { + second = 0; + } + // time + print!( + "{:?}/{:?}/{:?} {:02}:{:02}:{:02} UTC\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n", + time.year, time.month, time.day, time.hour, time.minutes, time.seconds + ); + second += 1; + } + } + */ + } +} +pub fn shutdown() {} +mod simple_graphics; +use simple_graphics::gl_basic; +mod timer; +use crate::arch::timer::timer_update; +use core::ffi::c_void; +use psp::{ + sys::{self, DisplayPixelFormat, GuState, TexturePixelFormat}, + vram_alloc::get_vram_allocator, + {BUF_WIDTH, SCREEN_HEIGHT, SCREEN_WIDTH}, +}; +pub mod init; +use crate::println; diff --git a/ableos/src/arch/ps_portable/simple_graphics.rs b/ableos/src/arch/ps_portable/simple_graphics.rs new file mode 100644 index 0000000..bfcd766 --- /dev/null +++ b/ableos/src/arch/ps_portable/simple_graphics.rs @@ -0,0 +1,27 @@ +use crate::arch::*; +/// used as a very basic bare minimum gl example +pub fn gl_basic() { + unsafe { + let mut allocator = get_vram_allocator().unwrap(); + let fbp0 = allocator + .alloc_texture_pixels(BUF_WIDTH, SCREEN_HEIGHT, TexturePixelFormat::Psm8888) + .as_mut_ptr_from_zero(); + sys::sceGuInit(); + sys::sceGuStart( + sys::GuContextType::Direct, + &mut LIST as *mut _ as *mut c_void, + ); + sys::sceGuDrawBuffer(DisplayPixelFormat::Psm8888, fbp0 as _, BUF_WIDTH as i32); + sys::sceGuDebugPrint( + 100, + 100, + 0xff0000ff, + b"hi there from ableOS PSP graphics\0" as *const u8, + ); + sys::sceGuDebugFlush(); + sys::sceGuFinish(); + sys::sceGuSync(sys::GuSyncMode::Finish, sys::GuSyncBehavior::Wait); + sys::sceDisplayWaitVblankStart(); + sys::sceGuDisplay(true); + } +} diff --git a/ableos/src/arch/ps_portable/timer.rs b/ableos/src/arch/ps_portable/timer.rs new file mode 100644 index 0000000..5a11b40 --- /dev/null +++ b/ableos/src/arch/ps_portable/timer.rs @@ -0,0 +1,13 @@ +pub fn timer_update() -> ScePspDateTime { + unsafe { + let mut tick = 0; + psp::sys::sceRtcGetCurrentTick(&mut tick); + // Convert the tick to an instance of `ScePspDateTime` + let mut date = MaybeUninit::uninit(); + psp::sys::sceRtcSetTick(date.as_mut_ptr(), &tick); + let date = date.assume_init(); + return date; + } +} +use core::mem::MaybeUninit; +use psp::sys::ScePspDateTime; diff --git a/ableos/src/arch/riscv/asm/boot.asm b/ableos/src/arch/riscv/asm/boot.asm new file mode 100644 index 0000000..2259f6c --- /dev/null +++ b/ableos/src/arch/riscv/asm/boot.asm @@ -0,0 +1,58 @@ +.S +# bootloader for SoS +# Stephen Marz +# 8 February 2019 +.option norvc +.section .data + +.section .text.init +.global _start +_start: + # Any hardware threads (hart) that are not bootstrapping + # need to wait for an IPI + csrr t0, mhartid + bnez t0, 3f + # SATP should be zero, but let's make sure + csrw satp, zero +.option push +.option norelax + la gp, _global_pointer +.option pop + + # The BSS section is expected to be zero + la a0, _bss_start + la a1, _bss_end + bgeu a0, a1, 2f +1: + sd zero, (a0) + addi a0, a0, 8 + bltu a0, a1, 1b +2: + + + +3: + wfi + j 3b + +# Control registers, set the stack, mstatus, mepc, +# and mtvec to return to the main function. +# li t5, 0xffff; +# csrw medeleg, t5 +# csrw mideleg, t5 +la sp, _stack +# We use mret here so that the mstatus register +# is properly updated. +li t0, (0b11 << 11) | (1 << 7) | (1 << 3) +csrw mstatus, t0 +la t1, kernel_main +csrw mepc, t1 +la t2, asm_trap_vector +csrw mtvec, t2 +li t3, (1 << 3) | (1 << 7) | (1 << 11) +csrw mie, t3 +la ra, 4f +mret +4: + wfi + j 4b diff --git a/ableos/src/arch/riscv/asm/trap.asm b/ableos/src/arch/riscv/asm/trap.asm new file mode 100644 index 0000000..60e9351 --- /dev/null +++ b/ableos/src/arch/riscv/asm/trap.asm @@ -0,0 +1,8 @@ +# trap.S +# Assembly-level trap handler. +.section .text +.global asm_trap_vector +asm_trap_vector: + # We get here when the CPU is interrupted + # for any reason. + mret diff --git a/ableos/src/arch/x86_64/.runners/debug.sh b/ableos/src/arch/x86_64/.runners/debug.sh new file mode 100644 index 0000000..caac024 --- /dev/null +++ b/ableos/src/arch/x86_64/.runners/debug.sh @@ -0,0 +1,2 @@ +cargo bootimage --target json_targets/x86_64-ableos.json && \ +qemu-system-x86_64 -S -gdb tcp::9000 -drive format=raw,file=target/x86_64-ableos/debug/bootimage-ableos.bin diff --git a/ableos/src/arch/x86_64/.runners/run-debug.sh b/ableos/src/arch/x86_64/.runners/run-debug.sh new file mode 100644 index 0000000..448bf8c --- /dev/null +++ b/ableos/src/arch/x86_64/.runners/run-debug.sh @@ -0,0 +1,2 @@ +cargo bootimage --target json_targets/x86_64-ableos.json && \ +qemu-system-x86_64 -drive format=raw,file=target/x86_64-ableos/debug/bootimage-ableos.bin diff --git a/ableos/src/arch/x86_64/.runners/run-test.sh b/ableos/src/arch/x86_64/.runners/run-test.sh new file mode 100644 index 0000000..448bf8c --- /dev/null +++ b/ableos/src/arch/x86_64/.runners/run-test.sh @@ -0,0 +1,2 @@ +cargo bootimage --target json_targets/x86_64-ableos.json && \ +qemu-system-x86_64 -drive format=raw,file=target/x86_64-ableos/debug/bootimage-ableos.bin diff --git a/ableos/src/arch/x86_64/.runners/run.sh b/ableos/src/arch/x86_64/.runners/run.sh new file mode 100644 index 0000000..afd3b54 --- /dev/null +++ b/ableos/src/arch/x86_64/.runners/run.sh @@ -0,0 +1,2 @@ +cargo bootimage --release --target json_targets/x86_64-ableos.json && \ +qemu-system-x86_64 -drive format=raw,file=target/x86_64-ableos/release/bootimage-ableos.bin diff --git a/ableos/src/arch/x86_64/drivers/graphics.rs b/ableos/src/arch/x86_64/drivers/graphics.rs new file mode 100644 index 0000000..b78999f --- /dev/null +++ b/ableos/src/arch/x86_64/drivers/graphics.rs @@ -0,0 +1,35 @@ +use crate::driver_traits::graphics::{Graphics, Point, Rgb}; +use cpuio::outw; + +pub struct GraphicsBuffer; + +#[allow(unused)] +impl Graphics for GraphicsBuffer { + fn put_line(coords_start: Point, coords_end: Point, thickness: u32, color: Rgb) { + todo!() + } + fn put_rect(coords_start: Point, coords_end: Point, color: Rgb) {} + fn put_circle(coords: Point, radius: u32) { + todo!() + } + fn put_triangle(coords_1: Point, coords_2: Point, coords_3: Point, thickness: u32, color: Rgb) { + todo!(); + } + fn put_pixel(coords: Point, color: Rgb) { + todo!() + } + fn paint_cursor(coords: Point) { + todo!() + } + fn hide_cursor() { + unsafe { + outw(0x0A, 0x3D4); + outw(0x20, 0x3D5); + } + } + fn show_cursor() {} + fn draw() {} + fn clear() { + todo!() + } +} diff --git a/ableos/src/arch/x86_64/drivers/mod.rs b/ableos/src/arch/x86_64/drivers/mod.rs new file mode 100644 index 0000000..d5087e9 --- /dev/null +++ b/ableos/src/arch/x86_64/drivers/mod.rs @@ -0,0 +1,5 @@ +pub mod graphics; +pub mod serial; + +#[deprecated(note = "The use of hardware specific drivers for VGA is discouraged")] +pub mod vga; diff --git a/ableos/src/arch/x86_64/drivers/serial.rs b/ableos/src/arch/x86_64/drivers/serial.rs new file mode 100644 index 0000000..16703c4 --- /dev/null +++ b/ableos/src/arch/x86_64/drivers/serial.rs @@ -0,0 +1,33 @@ +use lazy_static::lazy_static; +use spin::Mutex; +use uart_16550::SerialPort; +lazy_static! { + pub static ref SERIAL1: Mutex = { + let mut serial_port = unsafe { SerialPort::new(0x3F8) }; + serial_port.init(); + Mutex::new(serial_port) + }; +} +#[doc(hidden)] +pub fn _print(args: ::core::fmt::Arguments) { + use core::fmt::Write; + SERIAL1 + .lock() + .write_fmt(args) + .expect("Printing to serial failed"); +} +/// Prints to the host through the serial interface. +#[macro_export] +macro_rules! serial_print { + ($($arg:tt)*) => { + $crate::arch::drivers::serial::_print(format_args!($($arg)*)); + }; +} +/// Prints to the host through the serial interface, appending a newline. +#[macro_export] +macro_rules! serial_println { + () => ($crate::serial_print!("\n")); + ($fmt:expr) => ($crate::serial_print!(concat!($fmt, "\n"))); + ($fmt:expr, $($arg:tt)*) => ($crate::serial_print!( + concat!($fmt, "\n"), $($arg)*)); +} diff --git a/ableos/src/arch/x86_64/drivers/vga.rs b/ableos/src/arch/x86_64/drivers/vga.rs new file mode 100644 index 0000000..c7746f9 --- /dev/null +++ b/ableos/src/arch/x86_64/drivers/vga.rs @@ -0,0 +1,133 @@ +#[allow(dead_code)] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +#[repr(u8)] +pub enum Color { + Black = 0, + Blue = 1, + Green = 2, + Cyan = 3, + Red = 4, + Magenta = 5, + Brown = 6, + LightGray = 7, + DarkGray = 8, + LightBlue = 9, + LightGreen = 10, + LightCyan = 11, + LightRed = 12, + Pink = 13, + Yellow = 14, + White = 15, +} +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +#[repr(transparent)] +struct ColorCode(u8); +impl ColorCode { + fn new(foreground: Color, background: Color) -> ColorCode { + ColorCode((background as u8) << 4 | (foreground as u8)) + } +} +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +#[repr(C)] +struct ScreenChar { + ascii_character: u8, + color_code: ColorCode, +} +const BUFFER_HEIGHT: usize = 25; +const BUFFER_WIDTH: usize = 80; +#[repr(transparent)] +struct Buffer { + chars: [[Volatile; BUFFER_WIDTH]; BUFFER_HEIGHT], +} +pub struct Writer { + column_position: usize, + color_code: ColorCode, + buffer: &'static mut Buffer, +} +impl Writer { + pub fn write_byte(&mut self, byte: u8) { + match byte { + b'\n' => self.new_line(), + byte => { + if self.column_position >= BUFFER_WIDTH { + self.new_line(); + } + let row = BUFFER_HEIGHT - 1; + let col = self.column_position; + let color_code = self.color_code; + self.buffer.chars[row][col].write(ScreenChar { + ascii_character: byte, + color_code, + }); + self.column_position += 1; + } + } + } + pub fn write_string(&mut self, s: &str) { + for byte in s.bytes() { + match byte { + // printable ASCII byte or newline + 0x20..=0x7e | b'\n' => self.write_byte(byte), + // not part of printable ASCII range + _ => self.write_byte(0xfe), + } + } + } + fn new_line(&mut self) { + for row in 1..BUFFER_HEIGHT { + for col in 0..BUFFER_WIDTH { + let character = self.buffer.chars[row][col].read(); + self.buffer.chars[row - 1][col].write(character); + } + } + self.clear_row(BUFFER_HEIGHT - 1); + self.column_position = 0; + } + fn clear_row(&mut self, row: usize) { + let blank = ScreenChar { + ascii_character: b' ', + color_code: self.color_code, + }; + for col in 0..BUFFER_WIDTH { + self.buffer.chars[row][col].write(blank); + } + } +} +impl fmt::Write for Writer { + fn write_str(&mut self, s: &str) -> fmt::Result { + self.write_string(s); + Ok(()) + } +} +lazy_static! { + pub static ref WRITER: Mutex = Mutex::new(Writer { + column_position: 0, + color_code: ColorCode::new(Color::Green, Color::Black), + buffer: unsafe { &mut *(0xb8000 as *mut Buffer) }, + }); +} +#[allow(dead_code)] +pub fn set_vga_color() { + WRITER.lock().color_code = ColorCode::new(Color::White, Color::Yellow); +} +use core::fmt; +use lazy_static::lazy_static; +use spin::Mutex; +use volatile::Volatile; +#[macro_export] +macro_rules! kprint { + ($($arg:tt)*) => ($crate::arch::drivers::vga::_kprint(format_args!($($arg)*))); +} +#[macro_export] +macro_rules! kprintln { + () => ($crate::kprint!("\n")); + ($($arg:tt)*) => ($crate::kprint!("{}\n", format_args!($($arg)*))); +} +#[doc(hidden)] +pub fn _kprint(args: fmt::Arguments) { + use core::fmt::Write; + use x86_64::instructions::interrupts; + interrupts::without_interrupts(|| { + WRITER.lock().write_fmt(args).unwrap(); + }); +} diff --git a/ableos/src/arch/x86_64/gdt.rs b/ableos/src/arch/x86_64/gdt.rs new file mode 100644 index 0000000..3a0ff77 --- /dev/null +++ b/ableos/src/arch/x86_64/gdt.rs @@ -0,0 +1,46 @@ +use lazy_static::lazy_static; +use x86_64::structures::gdt::{Descriptor, GlobalDescriptorTable, SegmentSelector}; +use x86_64::structures::tss::TaskStateSegment; +use x86_64::VirtAddr; +pub const DOUBLE_FAULT_IST_INDEX: u16 = 0; +lazy_static! { + static ref TSS: TaskStateSegment = { + let mut tss = TaskStateSegment::new(); + tss.interrupt_stack_table[DOUBLE_FAULT_IST_INDEX as usize] = { + const STACK_SIZE: usize = 4096 * 5; + static mut STACK: [u8; STACK_SIZE] = [0; STACK_SIZE]; + + let stack_start = VirtAddr::from_ptr(unsafe { &STACK }); + stack_start + STACK_SIZE + }; + tss + }; +} +struct Selectors { + code_selector: SegmentSelector, + tss_selector: SegmentSelector, +} +lazy_static! { + static ref GDT: (GlobalDescriptorTable, Selectors) = { + let mut gdt = GlobalDescriptorTable::new(); + let code_selector = gdt.add_entry(Descriptor::kernel_code_segment()); + let tss_selector = gdt.add_entry(Descriptor::tss_segment(&TSS)); + ( + gdt, + Selectors { + code_selector, + tss_selector, + }, + ) + }; +} +pub fn init() { + use x86_64::instructions::segmentation::{Segment, CS}; + use x86_64::instructions::tables::load_tss; + + GDT.0.load(); + unsafe { + CS::set_reg(GDT.1.code_selector); + load_tss(GDT.1.tss_selector); + } +} diff --git a/ableos/src/arch/x86_64/init.rs b/ableos/src/arch/x86_64/init.rs new file mode 100644 index 0000000..853310c --- /dev/null +++ b/ableos/src/arch/x86_64/init.rs @@ -0,0 +1,11 @@ +#![allow(clippy::print_literal)] +use super::{gdt, interrupts}; +use crate::{println, serial_println}; +pub fn init() { + gdt::init(); + interrupts::init_idt(); + unsafe { interrupts::PICS.lock().initialize() }; + x86_64::instructions::interrupts::enable(); + println!("Initialized"); + serial_println!("Initialized"); +} diff --git a/ableos/src/arch/x86_64/interrupts.rs b/ableos/src/arch/x86_64/interrupts.rs new file mode 100644 index 0000000..2fe3570 --- /dev/null +++ b/ableos/src/arch/x86_64/interrupts.rs @@ -0,0 +1,112 @@ +use crate::{arch::gdt, print, println}; +use lazy_static::lazy_static; +use pic8259::ChainedPics; +use spin; +use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame}; +pub const PIC_1_OFFSET: u8 = 32; +pub const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8; +pub static PICS: spin::Mutex = + spin::Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) }); + +use crate::arch::sloop; +use x86_64::structures::idt::PageFaultErrorCode; +/// Interrupt offsets. +#[derive(Debug, Clone, Copy)] +#[repr(u8)] +pub enum InterruptIndex { + Timer = PIC_1_OFFSET, + Keyboard, +} +impl InterruptIndex { + fn as_u8(self) -> u8 { + self as u8 + } + fn as_usize(self) -> usize { + usize::from(self.as_u8()) + } +} +pub fn init_idt() { + IDT.load(); +} +lazy_static! { + static ref IDT: InterruptDescriptorTable = { + let mut idt = InterruptDescriptorTable::new(); + idt.breakpoint.set_handler_fn(breakpoint_handler); + unsafe { + idt.double_fault.set_handler_fn(double_fault_handler) + .set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX); // new + } + idt[InterruptIndex::Timer.as_usize()].set_handler_fn(timer_interrupt_handler); + idt[InterruptIndex::Keyboard.as_usize()] .set_handler_fn(keyboard_interrupt_handler); + idt + }; +} +extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) { + println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame); +} +// new +extern "x86-interrupt" fn double_fault_handler( + stack_frame: InterruptStackFrame, + _error_code: u64, +) -> ! { + panic!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame); +} +extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFrame) { + crate::kmain::tick(); + unsafe { + PICS.lock() + .notify_end_of_interrupt(InterruptIndex::Timer.as_u8()); + } +} +extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) { + use crate::keyboard::{ + CustomLayout, CustomScanCodeSet, DecodedKey, DecodedKeyKind, HandleControl, KeyCode, + Keyboard, + }; + use spin::Mutex; + use x86_64::instructions::port::Port; + lazy_static! { + static ref KEYBOARD: Mutex> = + Mutex::new(Keyboard::new( + CustomLayout::new_us104key(), + CustomScanCodeSet::default(), + HandleControl::Ignore + )); + } + let mut keyboard = KEYBOARD.lock(); + let mut port = Port::new(0x60); + let scancode: u8 = unsafe { port.read() }; + if let Ok(Some(key_event)) = keyboard.add_byte(scancode) { + if let Some(key) = keyboard.process_keyevent(key_event) { + match key { + DecodedKey { + kind: DecodedKeyKind::Unicode, + value: character, + } => { + print!("{}", char::try_from(character).unwrap()); + // serial_print!("{}", character); + crate::kmain::key_entropy(character.try_into().unwrap()); + } + DecodedKey { + kind: DecodedKeyKind::RawKey, + value: key, + } => print!("{:?}", KeyCode::from(key)), + } + } + } + unsafe { + PICS.lock() + .notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8()); + } +} +extern "x86-interrupt" fn page_fault_handler( + stack_frame: InterruptStackFrame, + error_code: PageFaultErrorCode, +) { + use x86_64::registers::control::Cr2; + println!["Exception: Page Fault"]; + println!["Address: {:?}", Cr2::read()]; + println!["Error Code: {:?}", error_code]; + println!["{:#?}", stack_frame]; + sloop(); +} diff --git a/ableos/src/arch/x86_64/mod.rs b/ableos/src/arch/x86_64/mod.rs new file mode 100644 index 0000000..3aec32e --- /dev/null +++ b/ableos/src/arch/x86_64/mod.rs @@ -0,0 +1,27 @@ +use x86_64::instructions::hlt; +pub mod drivers; +pub mod gdt; +pub mod init; +pub mod interrupts; +#[no_mangle] +pub extern "C" fn _start() -> ! { + crate::kmain::kernel_main(); + sloop(); +} + +#[allow(unused)] +pub fn shutdown() -> ! { + sloop(); +} + +pub fn sloop() -> ! { + loop { + hlt(); + } +} +#[cfg(test)] +pub fn test_runner(tests: &[&dyn Fn()]) { + for test in tests { + test(); + } +} diff --git a/ableos/src/driver_traits/device.rs b/ableos/src/driver_traits/device.rs new file mode 100644 index 0000000..58004d0 --- /dev/null +++ b/ableos/src/driver_traits/device.rs @@ -0,0 +1,4 @@ +pub trait Device { + fn probe(); + fn reset(); +} diff --git a/ableos/src/driver_traits/graphics.rs b/ableos/src/driver_traits/graphics.rs new file mode 100644 index 0000000..c95178c --- /dev/null +++ b/ableos/src/driver_traits/graphics.rs @@ -0,0 +1,37 @@ +#![allow(unused)] +pub enum GModes { + Vga800x600, + Custom(u16, u16), +} +pub type GCoord = usize; +pub struct Rgb { + pub r: u32, + pub g: u32, + pub b: u32, +} + +impl Rgb { + fn to_vga_color() { + todo!(); + } +} +pub type RefreshRate = u8; + +pub const REFRESH_RATE: u8 = 60; +pub type Resolution = (usize, usize); +pub type Point = (GCoord, GCoord); +pub struct FrameBuffer; +// [[Rgb; 5]; 5] +pub trait Graphics { + fn put_line(coords_start: Point, coords_end: Point, thickness: u32, color: Rgb); + fn put_rect(coords_start: Point, coords_end: Point, color: Rgb); + fn put_circle(coords: Point, radius: u32); + fn put_pixel(coords: Point, color: Rgb); + fn put_triangle(coords_1: Point, coords_2: Point, coords_3: Point, thickness: u32, color: Rgb); + fn paint_cursor(coords: Point); + fn hide_cursor(); + fn show_cursor(); + /// Actually move the double buffer to the single buffer and "update" the screen + fn draw(); + fn clear(); +} diff --git a/ableos/src/driver_traits/mod.rs b/ableos/src/driver_traits/mod.rs new file mode 100644 index 0000000..b832ebf --- /dev/null +++ b/ableos/src/driver_traits/mod.rs @@ -0,0 +1,2 @@ +pub mod graphics; +pub mod serial; diff --git a/ableos/src/driver_traits/mouse.rs b/ableos/src/driver_traits/mouse.rs new file mode 100644 index 0000000..892a57e --- /dev/null +++ b/ableos/src/driver_traits/mouse.rs @@ -0,0 +1,9 @@ +pub enum PS2MouseButton { + LeftMB, + RightMB, +} + +pub trait PS2Mouse { + fn movement(); + fn button(); +} diff --git a/ableos/src/driver_traits/serial.rs b/ableos/src/driver_traits/serial.rs new file mode 100644 index 0000000..6ffc40a --- /dev/null +++ b/ableos/src/driver_traits/serial.rs @@ -0,0 +1,4 @@ +pub trait Serial { + fn print(); + fn recieve(); +} diff --git a/ableos/src/experiments/EXPLAIN.md b/ableos/src/experiments/EXPLAIN.md new file mode 100644 index 0000000..8dd9fe8 --- /dev/null +++ b/ableos/src/experiments/EXPLAIN.md @@ -0,0 +1 @@ +Anything in experiments is heavily unstable and likely to change diff --git a/ableos/src/experiments/banner.txt b/ableos/src/experiments/banner.txt new file mode 100644 index 0000000..fdea73b --- /dev/null +++ b/ableos/src/experiments/banner.txt @@ -0,0 +1,7 @@ + ##### ##### + ## ##### # ###### ## ## # # + # # # # # # # # # +# # ##### # ##### # # ##### +###### # # # # # # # +# # # # # # ## ## # # +# # ##### ###### ###### ##### ##### diff --git a/ableos/src/experiments/clip.rs b/ableos/src/experiments/clip.rs new file mode 100644 index 0000000..5f63ffd --- /dev/null +++ b/ableos/src/experiments/clip.rs @@ -0,0 +1,55 @@ +use crate::alloc::vec; +use crate::String; +use crate::Vec; +use lazy_static::lazy_static; +#[derive(Debug)] +pub enum Mime { + None, + Text(String), +} + +lazy_static! { + pub static ref CLIPBOARD: spin::Mutex = { + let clipboard = Clipboard::new(); + + spin::Mutex::new(clipboard) + }; +} + +// ctrl+v paste but not pop and pastes +// ctrl+shift+v pops from the stack and pastes +// ctrl+c pushes to the stack +// ctrl+shift+< move stack pointer left +// ctrl+shift+> move stack pointer right + +pub struct Clipboard { + pub index: usize, + pub pages: Vec, +} +impl Clipboard { + pub fn new() -> Clipboard { + Clipboard { + index: 0, + pages: vec![], + } + } + pub fn clear(&mut self) { + self.pages = vec![]; + } + pub fn set_index(&mut self, index_new: usize) { + self.index = index_new; + } + pub fn clip_end(&mut self) { + self.index = 0; + } + pub fn clip_home(&mut self) { + self.index = self.pages.len(); + } + pub fn copy(&mut self, copy_mime: Mime) { + self.pages.push(copy_mime); + } + pub fn paste(&mut self) -> &Mime { + let paste_pos = &self.pages[self.index]; + paste_pos + } +} diff --git a/ableos/src/experiments/file.rs b/ableos/src/experiments/file.rs new file mode 100644 index 0000000..bb0a5d3 --- /dev/null +++ b/ableos/src/experiments/file.rs @@ -0,0 +1,22 @@ +struct Permissions { + write_files: bool, + read_files: bool, + execute_files: bool, + // Every other user is part of global + global_write_files: bool, + global_read_files: bool, + global_execute_files: bool, +} + +pub struct File { + owner: u8, + permissions: Permissions, + data: Vec, +} + +pub struct Folder { + owner: u8, + permissions: Permissions, + folders: Vec, + files: Vec, +} diff --git a/ableos/src/experiments/filesystem.txt b/ableos/src/experiments/filesystem.txt new file mode 100644 index 0000000..f1fe2cd --- /dev/null +++ b/ableos/src/experiments/filesystem.txt @@ -0,0 +1,15 @@ +/home/app1 +/conf/app1 +/apps/app1 + +file:app1 +conf:app1 +apps:app1 +// Discouraged +raw: + +///app1 +protocol.toml + + +hi = "" diff --git a/ableos/src/experiments/kinfo.rs b/ableos/src/experiments/kinfo.rs new file mode 100644 index 0000000..193d0ac --- /dev/null +++ b/ableos/src/experiments/kinfo.rs @@ -0,0 +1,34 @@ +// Can be standardized +// NOTE: Move this to relib +pub struct SemanticVersion { + pub major: u8, + pub minor: u8, + pub patch: u8, +} +impl core::fmt::Display for SemanticVersion { + fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result { + write!(f, "v{}.{}.{}", self.major, self.minor, self.patch) + } +} +// NOTE: Move to somewhere else +lazy_static! { + pub static ref KINFO: KernelInfo = KernelInfo { + kernel_version: SemanticVersion { + major: 0, + minor: 0, + patch: 0, + }, + memory: SystemMemory { used: 0, total: 0 } + }; +} +/// simple info you would want to know in a neofetch like program +pub struct KernelInfo { + // os: String, + // host: String, + pub kernel_version: SemanticVersion, + // cpu: String, + // gpu: String, + pub memory: SystemMemory, +} +use super::systeminfo::SystemMemory; +use lazy_static::lazy_static; diff --git a/ableos/src/experiments/mail.rs b/ableos/src/experiments/mail.rs new file mode 100644 index 0000000..63e5b97 --- /dev/null +++ b/ableos/src/experiments/mail.rs @@ -0,0 +1,72 @@ +#![allow(dead_code)] +use crate::serial_println; +pub struct MailBoxes { + flags: u8, + mailboxes: [u64; 4], +} +impl MailBoxes { + pub fn new() -> Self { + Self { + flags: 0b0000_0000, + mailboxes: [0; 4], + } + } + pub fn reset(&mut self) { + self.flags = 0b0000_0000; + self.mailboxes = [0; 4]; + } + pub fn set_mailbox(&mut self, mailbox_num: u8, mailbox_data: u64) { + if let 0..=3 = mailbox_num { + self.mailboxes[mailbox_num as usize] = mailbox_data + } + } + pub fn set_flag(&mut self, flag_num: u8) { + match flag_num { + 0 => { + self.flags |= 0b0000_0001; + } + 1 => { + self.flags |= 0b0000_0010; + } + 2 => { + self.flags |= 0b0000_0100; + } + 3 => { + self.flags |= 0b0000_1000; + } + 4 => { + self.flags |= 0b0001_0000; + } + 5 => { + self.flags |= 0b0010_0000; + } + 6 => { + self.flags |= 0b0100_0000; + } + 7 => { + self.flags |= 0b1000_0000; + } + + _ => {} + } + } + pub fn dump_flags(&self) { + serial_println!("Flag 0: {:08b}", self.flags & 0b0000_0001); + serial_println!("Flag 1: {:08b}", self.flags & 0b0000_0010); + serial_println!("Flag 2: {:08b}", self.flags & 0b0000_0100); + serial_println!("Flag 3: {:08b}", self.flags & 0b0000_1000); + serial_println!("Flag 4: {:08b}", self.flags & 0b0001_0000); + serial_println!("Flag 5: {:08b}", self.flags & 0b0010_0000); + serial_println!("Flag 6: {:08b}", self.flags & 0b0100_0000); + serial_println!("Flag 7: {:08b}", self.flags & 0b1000_0000); + + serial_println!("Flag 0: {}", self.flags & 0b0000_0001); + serial_println!("Flag 1: {}", self.flags >> 1 & 0b0000_0001); + serial_println!("Flag 2: {}", self.flags >> 2 & 0b0000_0001); + serial_println!("Flag 3: {}", self.flags >> 3 & 0b0000_0001); + serial_println!("Flag 4: {}", self.flags >> 4 & 0b0000_0001); + serial_println!("Flag 5: {}", self.flags >> 5 & 0b0000_0001); + serial_println!("Flag 6: {}", self.flags >> 6 & 0b0000_0001); + serial_println!("Flag 7: {}", self.flags >> 7 & 0b0000_0001); + } +} diff --git a/ableos/src/experiments/mod.rs b/ableos/src/experiments/mod.rs new file mode 100644 index 0000000..d8bf70f --- /dev/null +++ b/ableos/src/experiments/mod.rs @@ -0,0 +1,10 @@ +#![allow(dead_code)] + +pub mod server; +pub mod systeminfo; +pub mod virtual_memory; +// pub mod wm; +// added for experimental use +pub mod kinfo; +pub mod mail; +pub const BANNER: &str = include_str!("banner.txt"); diff --git a/ableos/src/experiments/pkg.rs b/ableos/src/experiments/pkg.rs new file mode 100644 index 0000000..ef3f54e --- /dev/null +++ b/ableos/src/experiments/pkg.rs @@ -0,0 +1,44 @@ +pub type PackageName = String; +use crate::experiments::kinfo::SemanticVersion; + +// Scuffed +pub type Hash = u8; +pub struct MetaPackage { + pub name: u8, + pub version: SemanticVersion, + pub authors: [u8; 8], + pub support_email: u8, + pub hash: Hash, +} + +impl MetaPackage { + pub fn new() -> Self { + Self { + name: 0, + version: SemanticVersion { + major: 0, + minor: 0, + patch: 0, + }, + authors: [0; 8], + support_email: 8, + hash: 0, + } + } + + fn validate_hash(&self) {} +} + +impl core::fmt::Display { + fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result { + write!( + f, + "Packname: {} +Version: {} +Authors: {:?} +Support Email: {} +Hash: {}", + self.name, self.version, self.authors, self.support_email, self.hash + ) + } +} diff --git a/ableos/src/experiments/schedule.rs b/ableos/src/experiments/schedule.rs new file mode 100644 index 0000000..0384d48 --- /dev/null +++ b/ableos/src/experiments/schedule.rs @@ -0,0 +1,24 @@ +pub type Priority = [Process; 512]; + +pub struct VirtualMemoryTable {} + +struct Process { + id: u64, + mem_table: *mut VirtualMemoryTable, // Pointer to a memory table +} + +pub struct Scheduler { + pub high_priority: Priority, //150 + pub medium_priority: Priority, //100 + pub low_priority: Priority, // 50 + pub next_pid: u64, +} + +impl Scheduler { + pub fn bump_up() {} + pub fn bump_down() {} + pub fn schedule(&mut self) { + let current_pid = self.next_pid; + self.next_pid += 1; + } +} diff --git a/ableos/src/experiments/server.rs b/ableos/src/experiments/server.rs new file mode 100644 index 0000000..42d82ac --- /dev/null +++ b/ableos/src/experiments/server.rs @@ -0,0 +1,10 @@ +pub trait Server { + /// Initialize the server and return a number + fn initialize() -> u32; + /// kill the server + fn kill() -> bool; + // put data in the servers outbox + fn send(); + // put data in the servers inbox and notify it + fn recieve(); +} diff --git a/ableos/src/experiments/syscalls.md b/ableos/src/experiments/syscalls.md new file mode 100644 index 0000000..b5e654a --- /dev/null +++ b/ableos/src/experiments/syscalls.md @@ -0,0 +1,39 @@ + +| low \\ high | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | +| ----------- | ------------------- | ------------------------ | ------------------------------------------------------------------------------------------ | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | +| 0 | **kill** | reserved | **sleep** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 1 | **stdout_reset** | reserved | **sleep_until** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 2 | **stdin** | reserved | [**nanosleep**](https://www.reddit.com/r/anime/comments/e7sg7g/nichijou_trouble_sleeping/) | **aes_encrypt** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 3 | **stdout** | reserved | **nanosleep_until** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 4 | **stdin_get_title** | reserved | **get_time** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 5 | **stdin_set_title** | reserved | **set_time** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 6 | **get_pid** | **make_directory** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 7 | **pinfo** | **delete_directory** | **socket_bind** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 8 | reserved | **rename_directory** | **socket_connect** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 9 | reserved | **set_directory_access** | **socket_disconnect** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| A | **set_priority** | **make_file** | **socket_send** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| B | **get_priority** | **delete_file** | **socket_receive** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| C | **get_hostname** | **rename_file** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| D | **set_hostname** | **set_file_access** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| E | reserved | **file_read** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| F | reserved | **file_write** | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | + +| low \\ high | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | +| ----------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------------- | +| 0 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 1 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 2 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 3 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 4 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 5 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 6 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 7 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 8 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| 9 | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| A | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| B | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| C | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| D | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| E | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | +| F | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | reserved | + diff --git a/ableos/src/experiments/systeminfo.rs b/ableos/src/experiments/systeminfo.rs new file mode 100644 index 0000000..552ad7f --- /dev/null +++ b/ableos/src/experiments/systeminfo.rs @@ -0,0 +1,33 @@ +// Can be standardized +// NOTE: move the file to the src/ dir +pub struct SystemMemory { + pub used: u64, + pub total: u64, +} +impl core::fmt::Display for SystemMemory { + fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result { + write!(f, "{} Bytes / {} Bytes", self.used, self.total) + } +} +/* +pub fn format_system_info() -> core::string::String { + let x = format!( + "{} +OS: AbleOS +Host: ComputAble +Kernel: {} +Uptime: 0:0:0 +Packages: 0 +Shell: Ashell +Gpu: MIPS32 R4000 R4k +Cpu: {} +Memory: {} +", + crate::experiments::BANNER, + crate::experiments::kinfo::KINFO.kernel_version, + crate::arch::ARCH, + crate::experiments::kinfo::KINFO.memory + ); + return x; +} +*/ diff --git a/ableos/src/experiments/user.rs b/ableos/src/experiments/user.rs new file mode 100644 index 0000000..645a57a --- /dev/null +++ b/ableos/src/experiments/user.rs @@ -0,0 +1,4 @@ +pub struct User { + id: u8, + clipboard: Clipboard, +} diff --git a/ableos/src/experiments/virtual_memory.rs b/ableos/src/experiments/virtual_memory.rs new file mode 100644 index 0000000..dd791e4 --- /dev/null +++ b/ableos/src/experiments/virtual_memory.rs @@ -0,0 +1,7 @@ +#![allow(dead_code)] + +pub struct Scheduler { + executables: usize, +} + +pub struct RunQueue {} diff --git a/ableos/src/experiments/wm.rs b/ableos/src/experiments/wm.rs new file mode 100644 index 0000000..cd02d3c --- /dev/null +++ b/ableos/src/experiments/wm.rs @@ -0,0 +1,23 @@ +//! used to give a base line example of windows and window handling +use crate::driver_traits::graphics::Point; +pub struct Window { + // title: String, + position: Point, + fullscreen: bool, +} +// all of these should return a result +impl Window { + pub fn fullscreen(&mut self) -> Result<(), u8> { + self.fullscreen = true; + Ok(()) + } + pub fn revert_fullscreen(&mut self) { + self.fullscreen = false; + } + pub fn set_title(&mut self) { + todo!(); + } + pub fn set_position(&mut self, pos: Point) { + self.position = pos; + } +} diff --git a/ableos/src/keyboard/abstractions.rs b/ableos/src/keyboard/abstractions.rs new file mode 100644 index 0000000..36f3e0c --- /dev/null +++ b/ableos/src/keyboard/abstractions.rs @@ -0,0 +1,623 @@ +#![allow(clippy::too_many_arguments)] +use super::*; +pub struct CustomScanCodeSet { + single_byte: [Option; 256], + extended: [Option; 256], +} +impl Default for CustomScanCodeSet { + fn default() -> Self { + Self::scancode_set1() + } +} +impl CustomScanCodeSet { + pub fn scancode_set1() -> Self { + let mut scancode_set = Self { + single_byte: [None; 256], + extended: [None; 256], + }; + scancode_set.single_byte[0x01] = Some(KeyCode::Escape); // 01 + scancode_set.single_byte[0x02] = Some(KeyCode::Key1); // 02 + scancode_set.single_byte[0x03] = Some(KeyCode::Key2); // 03 + scancode_set.single_byte[0x04] = Some(KeyCode::Key3); // 04 + scancode_set.single_byte[0x05] = Some(KeyCode::Key4); // 05 + scancode_set.single_byte[0x06] = Some(KeyCode::Key5); // 06 + scancode_set.single_byte[0x07] = Some(KeyCode::Key6); // 07 + scancode_set.single_byte[0x08] = Some(KeyCode::Key7); // 08 + scancode_set.single_byte[0x09] = Some(KeyCode::Key8); // 09 + scancode_set.single_byte[0x0A] = Some(KeyCode::Key9); // 0A + scancode_set.single_byte[0x0B] = Some(KeyCode::Key0); // 0B + scancode_set.single_byte[0x0C] = Some(KeyCode::Minus); // 0C + scancode_set.single_byte[0x0D] = Some(KeyCode::Equals); // 0D + scancode_set.single_byte[0x0E] = Some(KeyCode::Backspace); // 0E + scancode_set.single_byte[0x0F] = Some(KeyCode::Tab); // 0F + scancode_set.single_byte[0x10] = Some(KeyCode::Q); // 10 + scancode_set.single_byte[0x11] = Some(KeyCode::W); // 11 + scancode_set.single_byte[0x12] = Some(KeyCode::E); // 12 + scancode_set.single_byte[0x13] = Some(KeyCode::R); // 13 + scancode_set.single_byte[0x14] = Some(KeyCode::T); // 14 + scancode_set.single_byte[0x15] = Some(KeyCode::Y); // 15 + scancode_set.single_byte[0x16] = Some(KeyCode::U); // 16 + scancode_set.single_byte[0x17] = Some(KeyCode::I); // 17 + scancode_set.single_byte[0x18] = Some(KeyCode::O); // 18 + scancode_set.single_byte[0x19] = Some(KeyCode::P); // 19 + scancode_set.single_byte[0x1A] = Some(KeyCode::BracketSquareLeft); // 1A + scancode_set.single_byte[0x1B] = Some(KeyCode::BracketSquareRight); // 1B + scancode_set.single_byte[0x1C] = Some(KeyCode::Enter); // 1C + scancode_set.single_byte[0x1D] = Some(KeyCode::ControlLeft); // 1D + scancode_set.single_byte[0x1E] = Some(KeyCode::A); // 1E + scancode_set.single_byte[0x1F] = Some(KeyCode::S); // 1F + scancode_set.single_byte[0x20] = Some(KeyCode::D); // 20 + scancode_set.single_byte[0x21] = Some(KeyCode::F); // 21 + scancode_set.single_byte[0x22] = Some(KeyCode::G); // 22 + scancode_set.single_byte[0x23] = Some(KeyCode::H); // 23 + scancode_set.single_byte[0x24] = Some(KeyCode::J); // 24 + scancode_set.single_byte[0x25] = Some(KeyCode::K); // 25 + scancode_set.single_byte[0x26] = Some(KeyCode::L); // 26 + scancode_set.single_byte[0x27] = Some(KeyCode::SemiColon); // 27 + scancode_set.single_byte[0x28] = Some(KeyCode::Quote); // 28 + scancode_set.single_byte[0x29] = Some(KeyCode::BackTick); // 29 + scancode_set.single_byte[0x2A] = Some(KeyCode::ShiftLeft); // 2A + scancode_set.single_byte[0x2B] = Some(KeyCode::BackSlash); // 2B + scancode_set.single_byte[0x2C] = Some(KeyCode::Z); // 2C + scancode_set.single_byte[0x2D] = Some(KeyCode::X); // 2D + scancode_set.single_byte[0x2E] = Some(KeyCode::C); // 2E + scancode_set.single_byte[0x2F] = Some(KeyCode::V); // 2F + scancode_set.single_byte[0x30] = Some(KeyCode::B); // 30 + scancode_set.single_byte[0x31] = Some(KeyCode::N); // 31 + scancode_set.single_byte[0x32] = Some(KeyCode::M); // 32 + scancode_set.single_byte[0x33] = Some(KeyCode::Comma); // 33 + scancode_set.single_byte[0x34] = Some(KeyCode::Fullstop); // 34 + scancode_set.single_byte[0x35] = Some(KeyCode::Slash); // 35 + scancode_set.single_byte[0x36] = Some(KeyCode::ShiftRight); // 36 + scancode_set.single_byte[0x37] = Some(KeyCode::NumpadStar); // 37 + scancode_set.single_byte[0x38] = Some(KeyCode::AltLeft); // 38 + scancode_set.single_byte[0x39] = Some(KeyCode::Spacebar); // 39 + scancode_set.single_byte[0x3A] = Some(KeyCode::CapsLock); // 3A + scancode_set.single_byte[0x3B] = Some(KeyCode::F1); // 3B + scancode_set.single_byte[0x3C] = Some(KeyCode::F2); // 3C + scancode_set.single_byte[0x3D] = Some(KeyCode::F3); // 3D + scancode_set.single_byte[0x3E] = Some(KeyCode::F4); // 3E + scancode_set.single_byte[0x3F] = Some(KeyCode::F5); // 3F + scancode_set.single_byte[0x40] = Some(KeyCode::F6); // 40 + scancode_set.single_byte[0x41] = Some(KeyCode::F7); // 41 + scancode_set.single_byte[0x42] = Some(KeyCode::F8); // 42 + scancode_set.single_byte[0x43] = Some(KeyCode::F9); // 43 + scancode_set.single_byte[0x44] = Some(KeyCode::F10); // 44 + scancode_set.single_byte[0x45] = Some(KeyCode::NumpadLock); // 45 + scancode_set.single_byte[0x46] = Some(KeyCode::ScrollLock); // 46 + scancode_set.single_byte[0x47] = Some(KeyCode::Numpad7); // 47 + scancode_set.single_byte[0x48] = Some(KeyCode::Numpad8); // 48 + scancode_set.single_byte[0x49] = Some(KeyCode::Numpad9); // 49 + scancode_set.single_byte[0x4A] = Some(KeyCode::NumpadMinus); // 4A + scancode_set.single_byte[0x4B] = Some(KeyCode::Numpad4); // 4B + scancode_set.single_byte[0x4C] = Some(KeyCode::Numpad5); // 4C + scancode_set.single_byte[0x4D] = Some(KeyCode::Numpad6); // 4D + scancode_set.single_byte[0x4E] = Some(KeyCode::NumpadPlus); // 4E + scancode_set.single_byte[0x4F] = Some(KeyCode::Numpad1); // 4F + scancode_set.single_byte[0x50] = Some(KeyCode::Numpad2); // 50 + scancode_set.single_byte[0x51] = Some(KeyCode::Numpad3); // 51 + scancode_set.single_byte[0x52] = Some(KeyCode::Numpad0); // 52 + scancode_set.single_byte[0x53] = Some(KeyCode::NumpadPeriod); // 53 + // 0x54 + // 0x55 + // 0x56 + scancode_set.single_byte[0x57] = Some(KeyCode::F11); // 57 + scancode_set.single_byte[0x58] = Some(KeyCode::F12); // 58 + for i in 0x81..=0xD8 { + scancode_set.single_byte[i] = scancode_set.single_byte[i - 0x80]; + } + scancode_set.extended[0x10] = Some(KeyCode::PrevTrack); // E010 + //0x11 + //0x12 + //0x13 + //0x14 + //0x15 + //0x16 + //0x17 + //0x18 + scancode_set.extended[0x19] = Some(KeyCode::NextTrack); // E019 + //0x1A + //0x1B + scancode_set.extended[0x1C] = Some(KeyCode::NumpadEnter); // E01C + scancode_set.extended[0x1D] = Some(KeyCode::ControlRight); // E01D + //0x1E + //0x1F + scancode_set.extended[0x20] = Some(KeyCode::Mute); // E020 + scancode_set.extended[0x21] = Some(KeyCode::Calculator); // E021 + scancode_set.extended[0x22] = Some(KeyCode::Play); // E022 + //0x23 + scancode_set.extended[0x24] = Some(KeyCode::Stop); // E024 + //0x25 + //0x26 + //0x27 + //0x28 + //0x29 + //0x2A + //0x2B + //0x2C + //0x2D + scancode_set.extended[0x2E] = Some(KeyCode::VolumeDown); // E02E + //0x2F + scancode_set.extended[0x30] = Some(KeyCode::VolumeUp); // E030 + //0x31 + scancode_set.extended[0x32] = Some(KeyCode::WWWHome); // E032 + //0x33 + //0x34 + scancode_set.extended[0x35] = Some(KeyCode::NumpadSlash); // E035 + //0x36 + //0x37 + scancode_set.extended[0x38] = Some(KeyCode::AltRight); // E038 + //0x39 + //0x3A + //0x3B + //0x3C + //0x3D + //0x3E + //0x3F + //0x40 + //0x41 + //0x42 + //0x43 + //0x44 + //0x45 + //0x46 + scancode_set.extended[0x47] = Some(KeyCode::Home); // E047 + scancode_set.extended[0x48] = Some(KeyCode::ArrowUp); // E048 + scancode_set.extended[0x49] = Some(KeyCode::PageUp); // E049 + //0x4A + scancode_set.extended[0x4B] = Some(KeyCode::ArrowLeft); // E04B + //0x4C + scancode_set.extended[0x4D] = Some(KeyCode::ArrowRight); // E04D + //0x4E + scancode_set.extended[0x4F] = Some(KeyCode::End); // E04F + scancode_set.extended[0x50] = Some(KeyCode::ArrowDown); // E050 + scancode_set.extended[0x51] = Some(KeyCode::PageDown); // E051 + scancode_set.extended[0x52] = Some(KeyCode::Insert); // E052 + scancode_set.extended[0x53] = Some(KeyCode::Delete); // E053 + for i in 0x90..=0xED { + scancode_set.extended[i] = scancode_set.extended[i - 0x80]; + } + scancode_set + } + pub fn scancode_set2() -> Self { + Self { + single_byte: [None; 256], + extended: [None; 256], + } + } +} +impl ScancodeSet for CustomScanCodeSet { + fn advance_state(&self, state: &mut DecodeState, code: u8) -> Result, Error> { + match *state { + DecodeState::Start => { + match code { + EXTENDED_KEY_CODE => { + *state = DecodeState::Extended; + Ok(None) + } + 0x80..=0xFF => { + // Release codes + Ok(Some(KeyEvent::new( + self.map_scancode(code - 0x80)?, + KeyState::Up, + ))) + } + _ => { + // Normal codes + Ok(Some(KeyEvent::new( + self.map_scancode(code)?, + KeyState::Down, + ))) + } + } + } + DecodeState::Extended => { + *state = DecodeState::Start; + match code { + 0x80..=0xFF => { + // Extended Release codes + Ok(Some(KeyEvent::new( + self.map_extended_scancode(code - 0x80)?, + KeyState::Up, + ))) + } + _ => { + // Normal release codes + Ok(Some(KeyEvent::new( + self.map_extended_scancode(code)?, + KeyState::Down, + ))) + } + } + } + _ => { + // Can't get in to this state + unimplemented!(); + } + } + } + fn map_scancode(&self, code: u8) -> Result { + if let Some(kc) = self.single_byte[code as usize] { + Ok(kc) + } else { + Err(Error::UnknownKeyCode) + } + } + fn map_extended_scancode(&self, code: u8) -> Result { + if let Some(kc) = self.extended[code as usize] { + Ok(kc) + } else { + Err(Error::UnknownKeyCode) + } + } +} +#[derive(Debug, Clone, Copy)] +pub enum LayoutEntry { + Regular { + unshifted: Option, + shifted: Option, + altgr: Option, + raw_unicode: Option, + }, + Numlockable { + unshifted: Option, + shifted: Option, + locked: Option, + locked_shifted: Option, + }, + Capslockable { + unshifted: Option, + shifted: Option, + locked: Option, + locked_shifted: Option, + altgr: Option, + raw_unicode: Option, + }, +} +// Do not edit this file directly. Instead, create a `Keyboard` and modify that. +pub struct CustomLayout { + mapping: [LayoutEntry; 256], +} +impl Default for CustomLayout { + fn default() -> Self { + Self::new_us104key() + } +} +impl CustomLayout { + #[rustfmt::skip] + pub fn new_us104key() -> Self { + let mut mapping = Self { + mapping: [LayoutEntry::Regular { unshifted: None, shifted: None, altgr: None, raw_unicode: None }; 256], + }; + mapping.set_ab_c(KeyCode::BackTick, Some('`'.into()), Some('~'.into()), None); + mapping.set_aa_a(KeyCode::Escape, Some('\x1B'.into())); + mapping.set_ab_n(KeyCode::Key0, Some('0'.into()), Some(')'.into())); + mapping.set_ab_n(KeyCode::Key1, Some('1'.into()), Some('!'.into())); + mapping.set_ab_n(KeyCode::Key2, Some('2'.into()), Some('@'.into())); + mapping.set_ab_n(KeyCode::Key3, Some('3'.into()), Some('#'.into())); + mapping.set_ab_n(KeyCode::Key4, Some('4'.into()), Some('$'.into())); + mapping.set_ab_n(KeyCode::Key5, Some('5'.into()), Some('%'.into())); + mapping.set_ab_n(KeyCode::Key6, Some('6'.into()), Some('^'.into())); + mapping.set_ab_n(KeyCode::Key7, Some('7'.into()), Some('&'.into())); + mapping.set_ab_n(KeyCode::Key8, Some('8'.into()), Some('*'.into())); + mapping.set_ab_n(KeyCode::Key9, Some('9'.into()), Some('('.into())); + mapping.set_ab_n(KeyCode::Minus, Some('-'.into()), Some('_'.into())); + mapping.set_ab_n(KeyCode::Equals, Some('='.into()), Some('+'.into())); + mapping.set_aa_a(KeyCode::Backspace,Some('\x08'.into())); + mapping.set_aa_a(KeyCode::Tab,Some('\x09'.into())); + mapping.set_abcd_e_letter(KeyCode::Q, Some('q'.into()), Some('Q'.into()), Some('Q'.into()),Some('q'.into()), Some('\u{0011}'.into())); + mapping.set_abcd_e_letter(KeyCode::W, Some('w'.into()), Some('W'.into()), Some('W'.into()),Some('w'.into()), Some('\u{0017}'.into())); + mapping.set_abcd_e_letter(KeyCode::E, Some('e'.into()), Some('E'.into()), Some('E'.into()),Some('e'.into()), Some('\u{0005}'.into())); + mapping.set_abcd_e_letter(KeyCode::R, Some('r'.into()), Some('R'.into()), Some('R'.into()),Some('r'.into()), Some('\u{0012}'.into())); + mapping.set_abcd_e_letter(KeyCode::T, Some('t'.into()), Some('T'.into()), Some('T'.into()),Some('t'.into()), Some('\u{0014}'.into())); + mapping.set_abcd_e_letter(KeyCode::Y, Some('y'.into()), Some('Y'.into()), Some('Y'.into()),Some('y'.into()), Some('\u{0019}'.into())); + mapping.set_abcd_e_letter(KeyCode::U, Some('u'.into()), Some('U'.into()), Some('U'.into()),Some('u'.into()), Some('\u{0015}'.into())); + mapping.set_abcd_e_letter(KeyCode::I, Some('i'.into()), Some('I'.into()), Some('I'.into()),Some('i'.into()), Some('\u{0009}'.into())); + mapping.set_abcd_e_letter(KeyCode::O, Some('o'.into()), Some('O'.into()), Some('O'.into()),Some('o'.into()), Some('\u{000F}'.into())); + mapping.set_abcd_e_letter(KeyCode::P, Some('p'.into()), Some('P'.into()), Some('P'.into()),Some('p'.into()), Some('\u{0010}'.into())); + mapping.set_abcd_e_letter(KeyCode::A, Some('a'.into()), Some('A'.into()), Some('A'.into()),Some('a'.into()), Some('\u{0001}'.into())); + mapping.set_abcd_e_letter(KeyCode::S, Some('s'.into()), Some('S'.into()), Some('S'.into()),Some('s'.into()), Some('\u{0013}'.into())); + mapping.set_abcd_e_letter(KeyCode::D, Some('d'.into()), Some('D'.into()), Some('D'.into()),Some('d'.into()), Some('\u{0004}'.into())); + mapping.set_abcd_e_letter(KeyCode::F, Some('f'.into()), Some('F'.into()), Some('F'.into()),Some('f'.into()), Some('\u{0006}'.into())); + mapping.set_abcd_e_letter(KeyCode::G, Some('g'.into()), Some('G'.into()), Some('G'.into()),Some('g'.into()), Some('\u{0007}'.into())); + mapping.set_abcd_e_letter(KeyCode::H, Some('h'.into()), Some('H'.into()), Some('H'.into()),Some('h'.into()), Some('\u{0008}'.into())); + mapping.set_abcd_e_letter(KeyCode::J, Some('j'.into()), Some('J'.into()), Some('J'.into()),Some('j'.into()), Some('\u{000A}'.into())); + mapping.set_abcd_e_letter(KeyCode::K, Some('k'.into()), Some('K'.into()), Some('K'.into()),Some('k'.into()), Some('\u{000B}'.into())); + mapping.set_abcd_e_letter(KeyCode::L, Some('l'.into()), Some('L'.into()), Some('L'.into()),Some('l'.into()), Some('\u{000C}'.into())); + mapping.set_abcd_e_letter(KeyCode::Z, Some('z'.into()), Some('Z'.into()), Some('Z'.into()),Some('z'.into()), Some('\u{001A}'.into())); + mapping.set_abcd_e_letter(KeyCode::X, Some('x'.into()), Some('X'.into()), Some('X'.into()),Some('x'.into()), Some('\u{0018}'.into())); + mapping.set_abcd_e_letter(KeyCode::C, Some('c'.into()), Some('C'.into()), Some('C'.into()),Some('c'.into()), Some('\u{0003}'.into())); + mapping.set_abcd_e_letter(KeyCode::V, Some('v'.into()), Some('V'.into()), Some('V'.into()),Some('v'.into()), Some('\u{0016}'.into())); + mapping.set_abcd_e_letter(KeyCode::B, Some('b'.into()), Some('B'.into()), Some('B'.into()),Some('b'.into()), Some('\u{0002}'.into())); + mapping.set_abcd_e_letter(KeyCode::N, Some('n'.into()), Some('N'.into()), Some('N'.into()),Some('n'.into()), Some('\u{000E}'.into())); + mapping.set_abcd_e_letter(KeyCode::M, Some('m'.into()), Some('M'.into()), Some('M'.into()),Some('m'.into()), Some('\u{000D}'.into())); + mapping.set_ab_n(KeyCode::BracketSquareLeft, Some('{'.into()), Some('['.into())); + mapping.set_ab_n(KeyCode::BracketSquareRight, Some('}'.into()), Some(']'.into())); + mapping.set_ab_n(KeyCode::BackSlash, Some('|'.into()), Some('\\'.into())); + mapping.set_ab_n(KeyCode::SemiColon, Some(';'.into()), Some(':'.into())); + mapping.set_ab_n(KeyCode::Quote, Some('\''.into()), Some('"'.into())); + mapping.set_aa_a(KeyCode::Enter,Some('\x0A'.into())); + mapping.set_ab_n(KeyCode::Comma, Some(','.into()), Some('<'.into())); + mapping.set_ab_n(KeyCode::Fullstop, Some('.'.into()), Some('>'.into())); + mapping.set_ab_n(KeyCode::Slash, Some('/'.into()), Some('?'.into())); + mapping.set_aa_a(KeyCode::Spacebar,Some(' '.into())); + mapping.set_aa_a(KeyCode::Delete,Some('\x7F'.into())); + mapping.set_aaaa_num(KeyCode::NumpadSlash, Some('/'.into()), ); + mapping.set_aaaa_num(KeyCode::NumpadStar, Some('*'.into()), ); + mapping.set_aaaa_num(KeyCode::NumpadMinus, Some('-'.into()), ); + mapping.set_abba_num(KeyCode::Numpad7, Some('7'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::Home as u32 })); + mapping.set_abba_num(KeyCode::Numpad8, Some('8'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::ArrowUp as u32 })); + mapping.set_abba_num(KeyCode::Numpad9, Some('9'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::PageUp as u32 })); + mapping.set_aaaa_num(KeyCode::NumpadPlus, Some('+'.into())); + mapping.set_abba_num(KeyCode::Numpad4, Some('4'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::ArrowLeft as u32 })); + mapping.set_aaaa_num(KeyCode::Numpad5, Some('5'.into())); + mapping.set_abba_num(KeyCode::Numpad6, Some('6'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::ArrowRight as u32 })); + mapping.set_abba_num(KeyCode::Numpad1, Some('1'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::End as u32 })); + mapping.set_abba_num(KeyCode::Numpad2, Some('2'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::ArrowDown as u32 })); + mapping.set_abba_num(KeyCode::Numpad3, Some('3'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::PageDown as u32 })); + mapping.set_abba_num(KeyCode::Numpad0, Some('0'.into()), Some(DecodedKey{ kind: DecodedKeyKind::RawKey, value: KeyCode::Insert as u32 })); + mapping.set_abba_num(KeyCode::NumpadPeriod, Some('.'.into()), Some('\x7F'.into())); + mapping.set_aaaa_num(KeyCode::NumpadEnter, Some('\x0A'.into())); + mapping + } + #[rustfmt::skip] + pub fn new_us105key() -> Self { + let mut mapping = Self::new_us104key(); + mapping.set_abcde(KeyCode::BackTick, Some('`'.into()), Some('¬'.into()), Some('|'.into()), None); + mapping.set_ab_n(KeyCode::Key2, Some('2'.into()), Some('"'.into())); + mapping.set_ab_n(KeyCode::Quote, Some('\''.into()), Some('@'.into())); + mapping.set_ab_n(KeyCode::Key3, Some('3'.into()), Some('£'.into())); + mapping.set_abcde(KeyCode::BackTick, Some('4'.into()), Some('$'.into()), Some('€'.into()), None); + mapping.set_ab_n(KeyCode::HashTilde, Some('#'.into()), Some('~'.into())); + mapping + } +} +impl KeyboardLayout for CustomLayout { + fn map_keycode( + &self, + keycode: KeyCode, + modifiers: &Modifiers, + handle_ctrl: HandleControl, + ) -> DecodedKey { + let map_to_unicode = handle_ctrl == HandleControl::MapLettersToUnicode; + let spot = &self.mapping[keycode as usize]; + if let Some(k) = if map_to_unicode && modifiers.is_ctrl() { + match spot { + LayoutEntry::Regular { + unshifted: _, + shifted: _, + altgr: _, + raw_unicode, + } => raw_unicode, + LayoutEntry::Numlockable { + unshifted: _, + shifted: _, + locked: _, + locked_shifted: _, + } => &None, + LayoutEntry::Capslockable { + unshifted: _, + shifted: _, + locked: _, + locked_shifted: _, + raw_unicode, + altgr: _, + } => raw_unicode, + } + } else if modifiers.alt_gr { + match spot { + LayoutEntry::Regular { + unshifted: _, + shifted: _, + altgr, + raw_unicode: _, + } => altgr, + LayoutEntry::Numlockable { + unshifted: _, + shifted: _, + locked: _, + locked_shifted: _, + } => &None, + LayoutEntry::Capslockable { + unshifted: _, + shifted: _, + locked: _, + locked_shifted: _, + raw_unicode: _, + altgr, + } => altgr, + } + } else if modifiers.is_shifted() { + match spot { + LayoutEntry::Regular { + unshifted: _, + shifted, + altgr: _, + raw_unicode: _, + } => shifted, + LayoutEntry::Numlockable { + unshifted: _, + shifted, + locked: _, + locked_shifted, + } => { + if modifiers.numlock { + locked_shifted + } else { + shifted + } + } + LayoutEntry::Capslockable { + unshifted: _, + shifted, + locked: _, + locked_shifted, + raw_unicode: _, + altgr: _, + } => { + if modifiers.is_caps() { + locked_shifted + } else { + shifted + } + } + } + } else { + match spot { + LayoutEntry::Regular { + unshifted, + shifted: _, + altgr: _, + raw_unicode: _, + } => unshifted, + LayoutEntry::Numlockable { + unshifted, + shifted: _, + locked, + locked_shifted: _, + } => { + if modifiers.numlock { + locked + } else { + unshifted + } + } + LayoutEntry::Capslockable { + unshifted, + shifted: _, + locked, + locked_shifted: _, + raw_unicode: _, + altgr: _, + } => { + if modifiers.is_caps() { + locked + } else { + unshifted + } + } + } + } { + *k + } else { + DecodedKey::RawKey(keycode as u8) + } + } +} +// Note(elfein) Not super hard to get right, but still- DO NOT TOUCH +impl CustomLayout { + pub fn set_abcde( + &mut self, + index: KeyCode, + a: Option, + b: Option, + c: Option, + d: Option, + ) { + self.mapping[index as usize] = { + LayoutEntry::Regular { + unshifted: a, + shifted: b, + altgr: c, + raw_unicode: d, + } + }; + } + pub fn set_ab_c( + &mut self, + index: KeyCode, + a: Option, + b: Option, + c: Option, + ) { + self.mapping[index as usize] = { + LayoutEntry::Regular { + unshifted: a, + shifted: b, + altgr: None, + raw_unicode: c, + } + }; + } + pub fn set_ab_n(&mut self, index: KeyCode, a: Option, b: Option) { + self.mapping[index as usize] = { + LayoutEntry::Regular { + unshifted: a, + shifted: b, + altgr: None, + raw_unicode: None, + } + }; + } + pub fn set_aa_a(&mut self, index: KeyCode, a: Option) { + self.mapping[index as usize] = { + LayoutEntry::Regular { + unshifted: a, + shifted: a, + altgr: None, + raw_unicode: a, + } + }; + } + pub fn set_abcdef_letter( + &mut self, + index: KeyCode, + a: Option, + b: Option, + c: Option, + d: Option, + e: Option, + f: Option, + ) { + self.mapping[index as usize] = { + LayoutEntry::Capslockable { + unshifted: a, + shifted: b, + altgr: c, + locked: d, + locked_shifted: e, + raw_unicode: f, + } + }; + } + pub fn set_abcd_e_letter( + &mut self, + index: KeyCode, + a: Option, + b: Option, + c: Option, + d: Option, + e: Option, + ) { + self.mapping[index as usize] = { + LayoutEntry::Capslockable { + unshifted: a, + shifted: b, + locked: c, + locked_shifted: d, + altgr: None, + raw_unicode: e, + } + }; + } + pub fn set_aaaa_num(&mut self, index: KeyCode, a: Option) { + self.mapping[index as usize] = { + LayoutEntry::Numlockable { + unshifted: a, + shifted: a, + locked: a, + locked_shifted: a, + } + }; + } + pub fn set_abba_num(&mut self, index: KeyCode, a: Option, b: Option) { + self.mapping[index as usize] = { + LayoutEntry::Numlockable { + unshifted: a, + shifted: b, + locked: b, + locked_shifted: a, + } + }; + } +} diff --git a/ableos/src/keyboard/mod.rs b/ableos/src/keyboard/mod.rs new file mode 100644 index 0000000..c669dc6 --- /dev/null +++ b/ableos/src/keyboard/mod.rs @@ -0,0 +1,273 @@ +#![allow(dead_code)] +mod abstractions; +mod small_types; +mod traits; +pub use abstractions::*; +pub use small_types::*; +pub use traits::*; +const KEYCODE_BITS: u8 = 11; +const EXTENDED_KEY_CODE: u8 = 0xE0; +const KEY_RELEASE_CODE: u8 = 0xF0; +#[derive(Debug)] +pub struct Keyboard +where + T: KeyboardLayout, + S: ScancodeSet, +{ + register: u16, + num_bits: u8, + decode_state: DecodeState, + handle_ctrl: HandleControl, + modifiers: Modifiers, + layout: T, + set: S, +} +impl Keyboard +where + T: KeyboardLayout + Default, + S: ScancodeSet + Default, +{ + /// Make a new Keyboard object with the given layout. + pub fn new(_layout: T, _set: S, handle_ctrl: HandleControl) -> Keyboard { + Keyboard { + register: 0, + num_bits: 0, + decode_state: DecodeState::Start, + handle_ctrl, + modifiers: Modifiers { + lshift: false, + rshift: false, + lctrl: false, + rctrl: false, + numlock: true, + capslock: false, + alt_gr: false, + }, + layout: T::default(), + set: S::default(), + } + } + // /// Change the Ctrl key mapping. + pub fn set_ctrl_handling(&mut self, new_value: HandleControl) { + self.handle_ctrl = new_value; + } + // /// Get the current Ctrl key mapping. + pub fn get_ctrl_handling(&self) -> HandleControl { + self.handle_ctrl + } + /// Clears the bit register. + /// + /// Call this when there is a timeout reading data from the keyboard. + pub fn clear(&mut self) { + self.register = 0; + self.num_bits = 0; + self.decode_state = DecodeState::Start; + } + /// Processes a 16-bit word from the keyboard. + /// + /// * The start bit (0) must be in bit 0. + /// * The data octet must be in bits 1..8, with the LSB in bit 1 and the + /// MSB in bit 8. + /// * The parity bit must be in bit 9. + /// * The stop bit (1) must be in bit 10. + pub fn add_word(&mut self, word: u16) -> Result, Error> { + let byte = self.check_word(word)?; + self.add_byte(byte) + } + /// Processes an 8-bit byte from the keyboard. + /// + /// We assume the start, stop and parity bits have been processed and + /// verified. + pub fn add_byte(&mut self, byte: u8) -> Result, Error> { + self.set.advance_state(&mut self.decode_state, byte) + } + /// Shift a bit into the register. + /// + /// Call this /or/ call `add_word` - don't call both. + /// Until the last bit is added you get Ok(None) returned. + pub fn add_bit(&mut self, bit: bool) -> Result, Error> { + self.register |= (bit as u16) << self.num_bits; + self.num_bits += 1; + if self.num_bits == KEYCODE_BITS { + let word = self.register; + self.register = 0; + self.num_bits = 0; + self.add_word(word) + } else { + Ok(None) + } + } + /// Processes a `KeyEvent` returned from `add_bit`, `add_byte` or `add_word` + /// and produces a decoded key. + /// + /// For example, the KeyEvent for pressing the '5' key on your keyboard + /// gives a DecodedKey of unicode character '5', unless the shift key is + /// held in which case you get the unicode character '%'. + pub fn process_keyevent(&mut self, ev: KeyEvent) -> Option { + match ev { + KeyEvent { + code: KeyCode::ShiftLeft, + state: KeyState::Down, + } => { + self.modifiers.lshift = true; + None + } + KeyEvent { + code: KeyCode::ShiftRight, + state: KeyState::Down, + } => { + self.modifiers.rshift = true; + None + } + KeyEvent { + code: KeyCode::ShiftLeft, + state: KeyState::Up, + } => { + self.modifiers.lshift = false; + None + } + KeyEvent { + code: KeyCode::ShiftRight, + state: KeyState::Up, + } => { + self.modifiers.rshift = false; + None + } + KeyEvent { + code: KeyCode::CapsLock, + state: KeyState::Down, + } => { + self.modifiers.capslock = !self.modifiers.capslock; + None + } + KeyEvent { + code: KeyCode::NumpadLock, + state: KeyState::Down, + } => { + self.modifiers.numlock = !self.modifiers.numlock; + None + } + KeyEvent { + code: KeyCode::ControlLeft, + state: KeyState::Down, + } => { + self.modifiers.lctrl = true; + None + } + KeyEvent { + code: KeyCode::ControlLeft, + state: KeyState::Up, + } => { + self.modifiers.lctrl = false; + None + } + KeyEvent { + code: KeyCode::ControlRight, + state: KeyState::Down, + } => { + self.modifiers.rctrl = true; + None + } + KeyEvent { + code: KeyCode::ControlRight, + state: KeyState::Up, + } => { + self.modifiers.rctrl = false; + None + } + KeyEvent { + code: KeyCode::AltRight, + state: KeyState::Down, + } => { + self.modifiers.alt_gr = true; + None + } + KeyEvent { + code: KeyCode::AltRight, + state: KeyState::Up, + } => { + self.modifiers.alt_gr = false; + None + } + KeyEvent { + code: c, + state: KeyState::Down, + } => Some( + self.layout + .map_keycode(c, &self.modifiers, self.handle_ctrl), + ), + _ => None, + } + } + fn get_bit(&self, word: u16, offset: usize) -> bool { + ((word >> offset) & 0x0001) != 0 + } + fn has_even_number_bits(&self, data: u8) -> bool { + (data.count_ones() % 2) == 0 + } + /// Check 11-bit word has 1 start bit, 1 stop bit and an odd parity bit. + fn check_word(&self, word: u16) -> Result { + let start_bit = self.get_bit(word, 0); + let parity_bit = self.get_bit(word, 9); + let stop_bit = self.get_bit(word, 10); + let data = ((word >> 1) & 0xFF) as u8; + if start_bit { + return Err(Error::BadStartBit); + } + if !stop_bit { + return Err(Error::BadStopBit); + } + let need_parity = self.has_even_number_bits(data); + // Odd parity, so these must not match + if need_parity != parity_bit { + return Err(Error::ParityError); + } + Ok(data) + } +} +pub fn parse_format() { + let test = include_str!("../../keymaps/qwerty.keymap").lines(); + // r#"0-NONE\n1-HI#Says HI"# + for x in test { + for y in x.split('-') { + if y.parse::().is_ok() { + todo![]; + // NOTE: this unwrap is ok bcause of the above check + // println!("NUM: {:?}", y.parse::().unwrap()); + // serial_println!("NUM: {:?}", y.parse::().unwrap()); + } else if y.starts_with('#') { + // ignore all # delimeted lines + } else { + // println!("STR: {:?}", y); + // serial_println!("STR: {:?}", y); + match y.trim() { + "NONE" => {} + "TAB" => {} + "SHIFT" => {} + "SCROLL_LOCK" => {} + "FUNCTION_1" => {} + "FUNCTION_2" => {} + "FUNCTION_3" => {} + "FUNCTION_4" => {} + "FUNCTION_5" => {} + "FUNCTION_6" => {} + "FUNCTION_7" => {} + "FUNCTION_8" => {} + "FUNCTION_9" => {} + "FUNCTION_10" => {} + "FUNCTION_11" => {} + "FUNCTION_12" => {} + "COMMA" => {} + "PERIOD" => {} + "FORWARDSLASH" => {} + "GRAVE" => {} + "BRACKET_LEFT" => {} + "BACK_SLASH" => {} + "BRACKET_RIGHT" => {} + "QUOTE" => {} + _ => {} + } + } + } + } +} diff --git a/ableos/src/keyboard/small_types.rs b/ableos/src/keyboard/small_types.rs new file mode 100644 index 0000000..75ea706 --- /dev/null +++ b/ableos/src/keyboard/small_types.rs @@ -0,0 +1,246 @@ +#![allow(non_snake_case)] +#[derive(Debug)] +pub struct Modifiers { + pub lshift: bool, + pub rshift: bool, + pub lctrl: bool, + pub rctrl: bool, + pub numlock: bool, + pub capslock: bool, + pub alt_gr: bool, +} +impl Modifiers { + pub fn is_shifted(&self) -> bool { + self.lshift | self.rshift + } + pub fn is_ctrl(&self) -> bool { + self.lctrl | self.rctrl + } + pub fn is_caps(&self) -> bool { + self.capslock + } +} +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +pub enum KeyState { + Up, + Down, +} +#[derive(Debug, PartialEq, Eq, Clone)] +pub struct KeyEvent { + pub code: KeyCode, + pub state: KeyState, +} +impl KeyEvent { + pub fn new(code: KeyCode, state: KeyState) -> KeyEvent { + KeyEvent { code, state } + } +} +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +pub enum HandleControl { + /// If either Ctrl key is held down, convert the letters A through Z into + /// Unicode chars U+0001 through U+001A. If the Ctrl keys are not held + /// down, letters go through normally. + MapLettersToUnicode, + /// Don't do anything special - send through the Ctrl key up/down events, + /// and leave the letters as letters. + Ignore, +} +#[derive(Debug, Copy, Clone, Eq, PartialEq)] +pub enum DecodeState { + Start, + Extended, + Release, + ExtendedRelease, +} +/// Indicates different error conditions. +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +pub enum Error { + BadStartBit, + BadStopBit, + ParityError, + UnknownKeyCode, + InvalidState, +} +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +#[repr(u8)] +pub enum DecodedKeyKind { + RawKey = 0, + Unicode = 1, +} +#[derive(Debug, PartialEq, Eq, Copy, Clone)] +#[repr(C)] +pub struct DecodedKey { + pub kind: DecodedKeyKind, + pub value: u32, +} +impl From for DecodedKey { + fn from(ch: char) -> Self { + Self { + kind: DecodedKeyKind::Unicode, + value: ch as u32, + } + } +} +impl DecodedKey { + pub const ZERO: Self = Self { + kind: DecodedKeyKind::Unicode, + value: 0, + }; + pub fn Unicode(ch: char) -> Self { + Self { + kind: DecodedKeyKind::Unicode, + value: ch.into(), + } + } + pub fn RawKey(byte: u8) -> Self { + Self { + kind: DecodedKeyKind::RawKey, + value: byte.into(), + } + } +} +macro_rules! keycode_enum { + (@get_last $Variant:ident) => { + Self::$Variant + }; + (@get_last $Variant:ident, $($VariantTail:ident),*) => { + keycode_enum![@get_last $($VariantTail),*] + }; + ($($Variant:ident=$Value:expr,)*) => { + #[derive(Debug, PartialEq, Eq, Clone, Copy)] + #[repr(u8)] + pub enum KeyCode { + $($Variant = $Value),* + } + + impl core::convert::From for KeyCode { + fn from(n: u32) -> Self { + match n { + $($Value => Self::$Variant),*, + _ => keycode_enum![@get_last $($Variant),*] + } + } + } + }; + ($($Variant:ident=$Value:expr),* ) => { + keycode_enum!($($Variant=$Value,)* ); + }; +} +// This will be a way to map keys to other keys / keyyngs / macros +keycode_enum! { + AltLeft = 0x00, + AltRight = 0x01, + ArrowDown = 0x02, + ArrowLeft = 0x03, + ArrowRight = 0x04, + ArrowUp = 0x05, + BackSlash = 0x06, + Backspace = 0x07, + BackTick = 0x08, + BracketSquareLeft = 0x09, + BracketSquareRight = 0x0A, + CapsLock = 0x0B, + Comma = 0x0C, + ControlLeft = 0x0D, + ControlRight = 0x0E, + Delete = 0x0F, + End = 0x10, + Enter = 0x11, + Escape = 0x12, + Equals = 0x13, + F1 = 0x14, + F2 = 0x15, + F3 = 0x16, + F4 = 0x17, + F5 = 0x18, + F6 = 0x19, + F7 = 0x1A, + F8 = 0x1B, + F9 = 0x1C, + F10 = 0x1D, + F11 = 0x1E, + F12 = 0x1F, + Fullstop = 0x20, + Home = 0x21, + Insert = 0x22, + Key1 = 0x23, + Key2 = 0x24, + Key3 = 0x25, + Key4 = 0x26, + Key5 = 0x27, + Key6 = 0x28, + Key7 = 0x29, + Key8 = 0x2A, + Key9 = 0x2B, + Key0 = 0x2C, + Menus = 0x2D, + Minus = 0x2E, + Numpad0 = 0x2F, + Numpad1 = 0x30, + Numpad2 = 0x31, + Numpad3 = 0x32, + Numpad4 = 0x33, + Numpad5 = 0x34, + Numpad6 = 0x35, + Numpad7 = 0x36, + Numpad8 = 0x37, + Numpad9 = 0x38, + NumpadEnter = 0x39, + NumpadLock = 0x3A, + NumpadSlash = 0x3B, + NumpadStar = 0x3C, + NumpadMinus = 0x3D, + NumpadPeriod = 0x3E, + NumpadPlus = 0x3F, + PageDown = 0x40, + PageUp = 0x41, + PauseBreak = 0x42, + PrintScreen = 0x43, + ScrollLock = 0x44, + SemiColon = 0x45, + ShiftLeft = 0x46, + ShiftRight = 0x47, + Slash = 0x48, + Spacebar = 0x49, + Tab = 0x4A, + Quote = 0x4B, + WindowsLeft = 0x4C, + WindowsRight = 0x4D, + A = 0x4E, + B = 0x4F, + C = 0x50, + D = 0x51, + E = 0x52, + F = 0x53, + G = 0x54, + H = 0x55, + I = 0x56, + J = 0x57, + K = 0x58, + L = 0x59, + M = 0x5A, + N = 0x5B, + O = 0x5C, + P = 0x5D, + Q = 0x5E, + R = 0x5F, + S = 0x60, + T = 0x61, + U = 0x62, + V = 0x63, + W = 0x64, + X = 0x65, + Y = 0x66, + Z = 0x67, + HashTilde = 0x68, + PrevTrack = 0x69, + NextTrack = 0x6A, + Mute = 0x6B, + Calculator = 0x6C, + Play = 0x6D, + Stop = 0x6E, + VolumeDown = 0x6F, + VolumeUp = 0x70, + WWWHome = 0x71, + PowerOnTestOk = 0x72, +} diff --git a/ableos/src/keyboard/traits.rs b/ableos/src/keyboard/traits.rs new file mode 100644 index 0000000..789464e --- /dev/null +++ b/ableos/src/keyboard/traits.rs @@ -0,0 +1,21 @@ +use super::*; +pub trait ScancodeSet { + /// Handles the state logic for the decoding of scan codes into key events. + fn advance_state(&self, state: &mut DecodeState, code: u8) -> Result, Error>; + /// Convert a Scan Code set X byte to our 'KeyType' enum + fn map_scancode(&self, code: u8) -> Result; + /// Convert a Scan Code Set X extended byte (prefixed E0) to our `KeyType` + /// enum. + fn map_extended_scancode(&self, code: u8) -> Result; +} +pub trait KeyboardLayout { + /// Convert a `KeyType` enum to a Unicode character, if possible. + /// `KeyType::A` maps to `Some('a')` (or `Some('A')` if shifted), while + /// `KeyType::AltLeft` returns `None` + fn map_keycode( + &self, + keycode: KeyCode, + modifiers: &Modifiers, + handle_ctrl: HandleControl, + ) -> DecodedKey; +} diff --git a/ableos/src/kmain.rs b/ableos/src/kmain.rs new file mode 100644 index 0000000..0a87b50 --- /dev/null +++ b/ableos/src/kmain.rs @@ -0,0 +1,74 @@ +#![allow(clippy::empty_loop)] +use crate::{ + arch::{drivers::graphics::GraphicsBuffer, init}, + driver_traits::{graphics::Graphics, serial::Serial}, + relib::math::rand::{linearshift::LinearShiftRegister, prand::PRand, RAND_HANDLE, RNG}, + serial_print, serial_println, +}; +use lazy_static::lazy_static; +#[no_mangle] +#[allow(unconditional_recursion)] +pub extern "C" fn stack_overflow() -> u8 { + stack_overflow(); + 69 // NOTE: Any specific reason for this number asside from memes? +} + +use crate::keyboard::DecodedKey; + +lazy_static! { + pub static ref KEY_BUFFER: [DecodedKey; 256] = [DecodedKey::RawKey(123); 256]; + pub static ref KEY_BUFFER_POINTER: u8 = 0; +} +#[no_mangle] +pub extern "C" fn kernel_main() { + init::init(); + + GraphicsBuffer::draw(); + GraphicsBuffer::hide_cursor(); + GraphicsBuffer::show_cursor(); + seed_rng(); + + /* If AES is present then AES init rng as well + // Maybe via a cfg + AES::init_rng(); + + */ + + println!("init"); + { + use crate::experiments::mail::MailBoxes; + let mut x = MailBoxes::new(); + x.set_flag(1); + x.set_flag(2); + // x.dump_flags(); + } + + // stack_overflow(); + + loop {} +} +// TODO: reimplement for the random handler +pub fn seed_rng() -> PRand { + println!("Seeding PRNG"); + let data = TICK.lock(); + let mut rand = PRand::new(); + let seed = rand.rand(); + println!("{:?}", seed); + rand.seed(*data); + println!("Seeded PRNG"); + rand +} +lazy_static! { + // TODO: should have a sin wave influence contribution to entropy + pub static ref TICK: spin::Mutex = spin::Mutex::new(0); +} +/// called by arch specific timers to tick up all kernel related functions +pub fn tick() { + let mut data = TICK.lock(); + *data += 1; + // serial_println!("{}", *data); + RAND_HANDLE.lock().seed_entropy_timer(*data); +} +pub fn key_entropy(key: u8) { + RAND_HANDLE.lock().seed_entropy_keyboard(key); +} diff --git a/ableos/src/lib.rs b/ableos/src/lib.rs new file mode 100644 index 0000000..33f5828 --- /dev/null +++ b/ableos/src/lib.rs @@ -0,0 +1,43 @@ +#![no_std] +// #![deny(warnings)] +#![feature(asm)] +#![feature(global_asm)] +#![feature(abi_x86_interrupt)] +#![feature(core_intrinsics, lang_items, llvm_asm)] +// #![feature(alloc_error_handler)] // at the top of the file +#![reexport_test_harness_main = "test_main"] +#![feature(custom_test_frameworks)] +#![test_runner(crate::arch::test_runner)] +#[cfg(target_arch = "arm")] +#[path = "arch/aarch32/mod.rs"] +mod arch; + +#[cfg(target_arch = "aarch64")] +#[path = "arch/aarch64/mod.rs"] +mod arch; + +#[cfg(target_arch = "x86_64")] +#[path = "arch/x86_64/mod.rs"] +mod arch; +#[cfg(target_arch = "mips")] +#[path = "arch/ps_portable/mod.rs"] +mod arch; +#[macro_use] +pub mod print; +#[cfg(not(target_arch = "mips"))] +// pub mod allocator; +mod kmain; +#[cfg(not(target_arch = "mips"))] +mod panic; +mod driver_traits; +mod experiments; +pub use experiments::server; +pub mod keyboard; +pub mod relib; +pub const KERNEL_VERSION: &str = env!("CARGO_PKG_VERSION"); +#[cfg(debug_assertions)] +/// A constant to check if the kernel is in debug mode +pub const RELEASE_TYPE: &str = "debug"; +#[cfg(not(debug_assertions))] +/// A constant to check if the kernel is in release mode +pub const RELEASE_TYPE: &str = "release"; diff --git a/ableos/src/main.rs b/ableos/src/main.rs new file mode 100644 index 0000000..04916ef --- /dev/null +++ b/ableos/src/main.rs @@ -0,0 +1,3 @@ +#![no_std] +#![no_main] +pub use ableos::*; diff --git a/ableos/src/panic.rs b/ableos/src/panic.rs new file mode 100644 index 0000000..794139a --- /dev/null +++ b/ableos/src/panic.rs @@ -0,0 +1,9 @@ +use crate::{arch::sloop, println, serial_println}; +use core::panic::PanicInfo; + +#[panic_handler] +fn panic(info: &PanicInfo) -> ! { + println!("{}", info); + serial_println!("{}", info); + sloop() +} diff --git a/ableos/src/print.rs b/ableos/src/print.rs new file mode 100644 index 0000000..8579f70 --- /dev/null +++ b/ableos/src/print.rs @@ -0,0 +1,60 @@ +pub struct Stdout; +use core::fmt::Arguments; +use core::fmt::Error; +impl Stdout { + pub fn write_fmt(&mut self, arg: Arguments<'_>) /*-> Result<(), Error> */ + { + core::fmt::Write::write_fmt(self, arg); + // Ok(()) + } +} +impl core::fmt::Write for Stdout { + #[cfg(target_arch = "arm")] + fn write_str(&mut self, s: &str) -> Result<(), Error> { + use crate::arch::write; + write(s); + Ok(()) + } + + #[cfg(target_arch = "aarch64")] + fn write_str(&mut self, s: &str) -> Result<(), Error> { + // Don't actually print anything yet lmao + + Ok(()) + } + + #[cfg(target_arch = "x86_64")] + fn write_str(&mut self, s: &str) -> Result<(), Error> { + use crate::kprint; + // FIXME: causes issues + kprint!("{}", s); + Ok(()) + } + + #[cfg(target_arch = "mips")] + fn write_str(&mut self, s: &str) -> Result<(), Error> { + use psp::dprint; + dprint!("{}", s); + Ok(()) + } +} +#[macro_export] +macro_rules! print { + () => { + ::core::writeln!($crate::print::Stdout, "") + }; + ($($tt:tt)*) => { + ::core::write!($crate::print::Stdout, $($tt)*) + }; +} +#[macro_export] +macro_rules! println { + () =>{ + // ::core::writeln!($crate::print::Stdout, "\n") + panic![]; + }; + ($($tt:tt)*) => { + ::core::writeln!($crate::print::Stdout, $($tt)*) + // panic![]; + }; +} diff --git a/ableos/src/relib/math/mod.rs b/ableos/src/relib/math/mod.rs new file mode 100644 index 0000000..63945bc --- /dev/null +++ b/ableos/src/relib/math/mod.rs @@ -0,0 +1 @@ +pub mod rand; diff --git a/ableos/src/relib/math/rand/linearshift.rs b/ableos/src/relib/math/rand/linearshift.rs new file mode 100644 index 0000000..8e0c715 --- /dev/null +++ b/ableos/src/relib/math/rand/linearshift.rs @@ -0,0 +1,35 @@ +use crate::relib::math::rand::RNG; +pub struct LinearShiftRegister { + reg: u64, +} +// 64 bit +// non-cryptographically secure +impl RNG for LinearShiftRegister { + fn new() -> Self { + Self { reg: (1 << 63) | 1 } + } + fn rand(&mut self) -> u64 { + let newbit = (self.reg >> 1) ^ (self.reg >> 2) ^ (self.reg >> 7); + self.reg = (self.reg >> 1) | (newbit << 3); + newbit + } + fn seed(&mut self, seed: u64) { + let entropy = 34; // replace with hardware entropy + + let shifted = (self.reg >> 1) ^ ((self.reg >> 2) + entropy); + let x: u64 = 2983745; + let x123: u64 = 100000000; + let multitude: u64 = x123.wrapping_mul(x) / x; + let mult = shifted.wrapping_mul(multitude); + let seeded_bit = seed / mult; + + if false { + // crate::serial_println!("Entropy {}", entropy); + // crate::serial_println!("Multitude {}", multitude); + // crate::serial_println!("Seeded Bit {}", seeded_bit); + } + for _ in 0..seeded_bit { + self.rand(); + } + } +} diff --git a/ableos/src/relib/math/rand/mod.rs b/ableos/src/relib/math/rand/mod.rs new file mode 100644 index 0000000..78c66ab --- /dev/null +++ b/ableos/src/relib/math/rand/mod.rs @@ -0,0 +1,87 @@ +#![allow(dead_code)] +pub mod linearshift; +pub mod prand; +pub mod wichmanhillrand; // FIXEME: Reimplement +use crate::serial_println; +use lazy_static::lazy_static; +use linearshift::LinearShiftRegister; +use prand::PRand; +pub trait RNG { + fn new() -> Self; + fn rand(&mut self) -> u64; + fn seed(&mut self, seed: u64); +} + +pub type KeyEntropyHandler = u8; + +pub struct Entropy { + // Everytime entropy is used decrement bits count + bytes_count: u8, // 167 is our lower desired bit count + pool_index: u8, + pool: [u64; 255], +} +impl Entropy { + pub fn new() -> Self { + Self { + bytes_count: 0, + pool: [0; 255], + pool_index: 0, + } + } + pub fn poll_hardware() { + todo!(); + } + pub fn read_entropy(&mut self) -> u8 { + self.bytes_count -= 1; + 1 + } +} +impl Default for Entropy { + fn default() -> Self { + Self::new() + } +} +pub struct RandomHandeler { + prand: prand::PRand, + linearshift: linearshift::LinearShiftRegister, + entropy: Entropy, +} +impl RandomHandeler { + pub fn seed_entropy(&mut self) { + // n is even + self.prand + .seed(self.entropy.pool[self.entropy.pool_index as usize]); + //otherwise odd + self.linearshift + .seed(self.entropy.pool[self.entropy.pool_index as usize]); + } + // FIXME: Likely to panic + + pub fn seed_entropy_keyboard(&mut self, key: u8) { + self.entropy.pool_index += key; + if self.entropy.pool_index > 254 { + self.entropy.pool_index = 0 + } + self.entropy.pool[self.entropy.pool_index as usize] += key as u64; + + self.entropy.pool_index += 1; + } + pub fn seed_entropy_timer(&mut self, seed: u64) { + let bytes = seed.to_be_bytes(); + + for byte in bytes { + if self.entropy.pool_index > 254 { + self.entropy.pool_index = 0 + } + self.entropy.pool[self.entropy.pool_index as usize] += byte as u64; + self.entropy.pool_index += 1; + } + } +} +lazy_static! { + pub static ref RAND_HANDLE: spin::Mutex = spin::Mutex::new(RandomHandeler { + prand: PRand::new(), + linearshift: LinearShiftRegister::new(), + entropy: Entropy::new(), + }); +} diff --git a/ableos/src/relib/math/rand/prand.rs b/ableos/src/relib/math/rand/prand.rs new file mode 100644 index 0000000..509df21 --- /dev/null +++ b/ableos/src/relib/math/rand/prand.rs @@ -0,0 +1,17 @@ +use crate::relib::math::rand::RNG; +pub struct PRand { + next: u64, +} +impl RNG for PRand { + fn new() -> Self { + Self { next: 7 } + } + fn rand(&mut self) -> u64 { + let internal_seed_1 = 21354; + self.next = self.next.wrapping_mul(1103515245) + internal_seed_1; + (self.next / 65536) % 32768 + } + fn seed(&mut self, seed: u64) { + self.next = seed; + } +} diff --git a/ableos/src/relib/math/rand/wichmanhillrand.rs b/ableos/src/relib/math/rand/wichmanhillrand.rs new file mode 100644 index 0000000..9857c6d --- /dev/null +++ b/ableos/src/relib/math/rand/wichmanhillrand.rs @@ -0,0 +1,27 @@ +use crate::relib::math::rand::RNG; +pub struct WichmannHillRand { + seed0: u16, + seed1: u16, + seed2: u16, +} +impl RNG for WichmannHillRand { + fn new() -> Self { + Self { + seed0: 123, + seed1: 456, + seed2: 789, + } + } + fn rand(&mut self) -> u64 { + self.seed0 = (self.seed0.wrapping_mul(170)) % 30269; + self.seed1 = (self.seed1.wrapping_mul(172)) % 30307; + self.seed2 = (self.seed2.wrapping_mul(173)) % 30323; + + (self.seed0 / 30269 + self.seed1 / 30307 + self.seed2 / 30323).into() + } + fn seed(&mut self, seed: u64) { + self.seed0 = (seed >> 48) as u16; + self.seed1 = ((seed << 16) >> 48) as u16; + self.seed2 = ((seed << 32) >> 48) as u16; + } +} diff --git a/ableos/src/relib/mod.rs b/ableos/src/relib/mod.rs new file mode 100644 index 0000000..9be1b43 --- /dev/null +++ b/ableos/src/relib/mod.rs @@ -0,0 +1,6 @@ +pub mod math; +pub mod time; +pub struct VectorTwo { + pub x: i32, + pub y: i32, +} diff --git a/ableos/src/relib/time/kilotime.rs b/ableos/src/relib/time/kilotime.rs new file mode 100644 index 0000000..4941da8 --- /dev/null +++ b/ableos/src/relib/time/kilotime.rs @@ -0,0 +1,72 @@ +use super::Time; +use core::fmt::{Display, Error, Formatter}; +#[derive(Debug, Clone, Copy)] +#[repr(transparent)] +pub struct Kilosecond(usize); +impl Display for Kilosecond { + fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { + let mut reg = self.0; + let mut buf = [0u8, 0, 0, 0, 0]; + let mut n = 0; + while n < 8 { + if n > 2 { + buf[7 - n] = match reg % 10 { + 0 => b'0', + 1 => b'1', + 2 => b'2', + 3 => b'3', + 4 => b'4', + 5 => b'5', + 6 => b'6', + 7 => b'7', + 8 => b'8', + 9 => b'9', + _ => unreachable!["CPU is borken"], + }; + } + reg /= 10; + n += 1; + } + for (n, b) in buf.iter().enumerate() { + write![f, "{}", *b as char]?; + if n == 1 { + write![f, "."]?; + } + } + Ok(()) + } +} +impl core::ops::Add for Kilosecond { + type Output = Self; + fn add(self, rhs: Self) -> Self { + Self(self.0 + rhs.0) + } +} +impl core::ops::Sub for Kilosecond { + type Output = Self; + fn sub(self, rhs: Self) -> Self { + Self(self.0 - rhs.0) + } +} +impl From