More general runtime

2023-11-26 04:13:30 +01:00 · 2023-11-26 04:13:30 +01:00 · 8c257e9216
parent 84cc1db691
commit 8c257e9216
7 changed files with 49 additions and 245 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -220,8 +220,7 @@ name = "hbxrt"
 version = "0.1.0"
 dependencies = [
 "hbvm",
- "nix",
- "windows",
+ "memmap2",
 ]

 [[package]]
@ -257,6 +256,15 @@ version = "2.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"

+[[package]]
+name = "memmap2"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "deaba38d7abf1d4cca21cc89e932e542ba2b9258664d2a9ef0e61512039c9375"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.7.1"
@ -528,82 +536,6 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

-[[package]]
-name = "windows"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
-dependencies = [
- "windows-core",
- "windows-targets",
-]
-
-[[package]]
-name = "windows-core"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
-dependencies = [
- "windows-targets",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
-dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
-]
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
-
-[[package]]
-name = "windows_i686_gnu"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
-
 [[package]]
 name = "with_builtin_macros"
 version = "0.0.3"
--- a/hbxrt/Cargo.toml
+++ b/hbxrt/Cargo.toml
@ -6,16 +6,4 @@ default-run = "hbxrt"

 [dependencies]
 hbvm.path = "../hbvm"
-
-[target.'cfg(unix)'.dependencies]
-nix = { version = "0.27", features = ["mman", "signal"] }
-
-[target.'cfg(windows)'.dependencies.windows]
-version = "0.52"
-features = [
-    "Win32_Foundation",
-    "Win32_System_Memory",
-    "Win32_System_SystemServices",
-    "Win32_Security",
-    "Win32_Storage_FileSystem",
-]
+memmap2   = "0.9"
--- a/hbxrt/src/main.rs
+++ b/hbxrt/src/main.rs
@ -2,43 +2,50 @@

 #![deny(unsafe_op_in_unsafe_fn)]

-#[cfg(unix)]
-#[path = "unix.rs"]
-mod platform;
-
-#[cfg(windows)]
-#[path = "win32.rs"]
-mod platform;
-
+mod eca;
 mod mem;

 use {
    hbvm::{mem::Address, Vm, VmRunOk},
-    std::{env::args, process::exit},
+    memmap2::Mmap,
+    std::{env::args, fs::File, io::Read, mem::MaybeUninit, process::exit},
 };

+type RtVm = Vm<mem::HostMemory, 0>;
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
    eprintln!("== HB×RT (Holey Bytes Experimental Runtime) v0.1 ==");
    eprintln!("[W] Currently supporting only flat images");

-    let Some(image_path) = args().nth(1) else {
+    let mut args = args().skip(1);
+    let Some(image_path) = args.next() else {
        eprintln!("[E] Missing image path");
        exit(1);
    };

+    let dsls = args.next().as_deref() == Some("-L");
+    if cfg!(not(target_os = "linux")) && dsls {
+        eprintln!("[E] Unsupported platform for Direct Linux syscall mode");
+        exit(1);
+    }
+
+    if dsls {
+        eprintln!("[I] Direct Linux syscall mode activated")
+    }
+
    // Allocate stack
-    let stack_ptr = unsafe { platform::alloc_stack(1024 * 1024 * 2) }?;
-    eprintln!("[I] Stack allocated at {stack_ptr:p}");
+    let mut stack = Box::new(MaybeUninit::<[u8; 1024 * 1024 * 2]>::uninit());
+    eprintln!("[I] Stack allocated at {:p}", stack.as_ptr());

    // Load program
    eprintln!("[I] Loading image from \"{image_path}\"");
-    let ptr = unsafe { platform::mmap_bytecode(image_path) }?;
-    eprintln!("[I] Image loaded at {ptr:p}");
+    let file_handle = File::open(image_path)?;
+    let mmap = unsafe { Mmap::map(&file_handle) }?;

-    let mut vm = unsafe { Vm::<_, 0>::new(mem::HostMemory, Address::new(ptr as u64)) };
-    vm.write_reg(254, stack_ptr as u64);
+    eprintln!("[I] Image loaded at {:p}", mmap.as_ptr());

-    unsafe { platform::catch_mafs() }?;
+    let mut vm = unsafe { Vm::<_, 0>::new(mem::HostMemory, Address::new(mmap.as_ptr() as u64)) };
+    vm.write_reg(254, stack.as_mut_ptr() as u64);

    // Execute program
    let stat = loop {
@ -48,7 +55,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                vm.pc, vm.registers
            ),
            Ok(VmRunOk::Timer) => (),
-            Ok(VmRunOk::Ecall) => unsafe {
+            Ok(VmRunOk::Ecall) if dsls => unsafe {
                std::arch::asm!(
                    "syscall",
                    inlateout("rax") vm.registers[1].0,
@ -60,6 +67,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                    in("r9")  vm.registers[7].0,
                )
            },
+            Ok(VmRunOk::Ecall) => {
+                eprintln!("[E] General environment calls not supported");
+                exit(1);
+            }
            Ok(VmRunOk::End) => break Ok(()),
            Err(e) => break Err(e),
        }
--- a/hbxrt/src/unix.rs
+++ b/hbxrt/src/unix.rs
@ -1,67 +0,0 @@
-use {
-    nix::sys::mman::{mmap, MapFlags, ProtFlags},
-    std::{fs::File, num::NonZeroUsize, path::Path, process::exit},
-};
-
-/// Allocate stack for program
-pub unsafe fn alloc_stack(size: usize) -> nix::Result<*mut u8> {
-    unsafe {
-        Ok(mmap::<std::fs::File>(
-            None,
-            NonZeroUsize::new(size).expect("Stack size should be > 0"),
-            ProtFlags::PROT_GROWSDOWN | ProtFlags::PROT_READ | ProtFlags::PROT_WRITE,
-            MapFlags::MAP_GROWSDOWN
-                | MapFlags::MAP_STACK
-                | MapFlags::MAP_ANON
-                | MapFlags::MAP_PRIVATE,
-            None,
-            0,
-        )?
-        .cast())
-    }
-}
-
-/// Memory map bytecode
-pub unsafe fn mmap_bytecode(path: impl AsRef<Path>) -> Result<*mut u8, Box<dyn std::error::Error>> {
-    let file = File::open(&path)?;
-    Ok(unsafe {
-        mmap(
-            None,
-            NonZeroUsize::new(file.metadata()?.len() as usize).ok_or("File is empty")?,
-            ProtFlags::PROT_READ,
-            MapFlags::MAP_PRIVATE,
-            Some(&file),
-            0,
-        )?
-        .cast()
-    })
-}
-
-/// Set handler for page fault
-pub unsafe fn catch_mafs() -> nix::Result<()> {
-    unsafe {
-        use nix::sys::signal;
-
-        extern "C" fn action(
-            _: std::ffi::c_int,
-            info: *mut nix::libc::siginfo_t,
-            _: *mut std::ffi::c_void,
-        ) {
-            unsafe {
-                eprintln!("[E] Memory access fault at {:p}", (*info).si_addr());
-                exit(2);
-            }
-        }
-
-        signal::sigaction(
-            signal::Signal::SIGSEGV,
-            &nix::sys::signal::SigAction::new(
-                signal::SigHandler::SigAction(action),
-                signal::SaFlags::SA_NODEFER,
-                nix::sys::signalfd::SigSet::empty(),
-            ),
-        )?;
-    }
-
-    Ok(())
-}
--- a/hbxrt/src/win32.rs
+++ b/hbxrt/src/win32.rs
@ -1,69 +0,0 @@
-use {
-    std::path::Path,
-    windows::{
-        core::PCSTR,
-        Win32::{
-            Foundation::{GetLastError, GENERIC_READ},
-            Storage::FileSystem,
-            System::{
-                Memory::{self},
-                SystemServices::{self},
-            },
-        },
-    },
-};
-
-/// Allocates tack for the program
-pub unsafe fn alloc_stack(size: usize) -> windows::core::Result<*mut u8> {
-    let ptr = unsafe {
-        Memory::VirtualAlloc(
-            None,
-            size,
-            Memory::VIRTUAL_ALLOCATION_TYPE(SystemServices::MEM_TOP_DOWN) | Memory::MEM_COMMIT,
-            Memory::PAGE_READWRITE,
-        )
-    };
-
-    if ptr.is_null() {
-        unsafe { GetLastError() }?;
-    }
-
-    Ok(ptr.cast())
-}
-
-/// Memory map bytecode
-pub unsafe fn mmap_bytecode(path: impl AsRef<Path>) -> windows::core::Result<*mut u8> {
-    unsafe {
-        let file = FileSystem::CreateFileA(
-            PCSTR(path.as_ref().as_os_str().as_encoded_bytes().as_ptr()),
-            GENERIC_READ.0,
-            FileSystem::FILE_SHARE_READ,
-            None,
-            FileSystem::OPEN_EXISTING,
-            FileSystem::FILE_ATTRIBUTE_NORMAL,
-            None,
-        )?;
-
-        let h = Memory::CreateFileMappingA(
-            file,
-            None,
-            Memory::PAGE_READONLY,
-            0,
-            0,
-            PCSTR("Bytecode\0".as_ptr()),
-        )?;
-
-        let addr = Memory::MapViewOfFile(h, Memory::FILE_MAP_READ, 0, 0, 0);
-
-        if addr.Value.is_null() {
-            GetLastError()?;
-        }
-
-        Ok(addr.Value.cast())
-    }
-}
-
-/// Catch memory access faults
-pub unsafe fn catch_mafs() -> std::io::Result<()> {
-    Ok(())
-}
--- a/program.hbf
+++ b/program.hbf
--- a/test.hba
+++ b/test.hba
@ -0,0 +1,9 @@
+let hello = data::str("Hello, world!");
+
+li8(r1, 6);
+li8(r2, 10);
+lra16(r3, r0, hello);
+li8(r4, hello.len);
+
+eca();
+tx();