Add basic Win32 support

Cargo.lock

@@ -221,6 +221,7 @@ version = "0.1.0"
 dependencies = [
  "hbvm",
  "nix",
+ "windows",
 ]
 
 [[package]]
@@ -527,6 +528,82 @@ 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"

hbvm/fuzz/.gitignore

@@ -1,5 +0,0 @@
-target
-artifacts
-corpus
-coverage
-Cargo.lock

hbvm/fuzz/Cargo.toml

@@ -1,30 +0,0 @@
-[package]
-name = "hbvm-fuzz"
-version = "0.0.0"
-publish = false
-edition = "2021"
-
-[package.metadata]
-cargo-fuzz = true
-
-[dependencies]
-libfuzzer-sys = "0.4"
-
-[dependencies.hbvm]
-path = ".."
-
-[dependencies.hbbytecode]
-path = "../../hbbytecode"
-
-# Prevent this from interfering with workspaces
-[workspace]
-members = ["."]
-
-[profile.release]
-debug = 1
-
-[[bin]]
-name = "vm"
-path = "fuzz_targets/vm.rs"
-test = false
-doc = false

hbvm/fuzz/fuzz_targets/vm.rs

@@ -1,82 +0,0 @@
-#![no_main]
-
-use {
-    hbvm::{
-        mem::{
-            softpaging::{
-                paging::{PageTable, Permission},
-                HandlePageFault, PageSize, SoftPagedMem,
-            },
-            Address, MemoryAccessReason,
-        },
-        Vm,
-    },
-    libfuzzer_sys::fuzz_target,
-};
-
-fuzz_target!(|data: &[u8]| {
-    let mut vm = unsafe {
-        Vm::<_, 16384>::new(
-            SoftPagedMem::<_, true> {
-                pf_handler: TestTrapHandler,
-                program:    data,
-                root_pt:    Box::into_raw(Default::default()),
-                icache:     Default::default(),
-            },
-            Address::new(4),
-        )
-    };
-
-    // Alloc and map some memory
-    let pages = [
-        alloc_and_map(&mut vm.memory, 0),
-        alloc_and_map(&mut vm.memory, 4096),
-    ];
-
-    // Run VM
-    let _ = vm.run();
-
-    // Unmap and dealloc the memory
-    for (i, page) in pages.into_iter().enumerate() {
-        unmap_and_dealloc(&mut vm.memory, page, i as u64 * 4096);
-    }
-
-    let _ = unsafe { Box::from_raw(vm.memory.root_pt) };
-});
-
-fn alloc_and_map(memory: &mut SoftPagedMem<TestTrapHandler>, at: u64) -> *mut u8 {
-    let ptr = Box::into_raw(Box::<Page>::default()).cast();
-    unsafe {
-        memory
-            .map(ptr, Address::new(at), Permission::Write, PageSize::Size4K)
-            .unwrap()
-    };
-    ptr
-}
-
-fn unmap_and_dealloc(memory: &mut SoftPagedMem<TestTrapHandler>, ptr: *mut u8, from: u64) {
-    memory.unmap(Address::new(from)).unwrap();
-    let _ = unsafe { Box::from_raw(ptr.cast::<Page>()) };
-}
-
-#[repr(align(4096))]
-struct Page([u8; 4096]);
-impl Default for Page {
-    fn default() -> Self {
-        unsafe { std::mem::MaybeUninit::zeroed().assume_init() }
-    }
-}
-
-struct TestTrapHandler;
-impl HandlePageFault for TestTrapHandler {
-    fn page_fault(
-        &mut self,
-        _: MemoryAccessReason,
-        _: &mut PageTable,
-        _: Address,
-        _: PageSize,
-        _: *mut u8,
-    ) -> bool {
-        false
-    }
-}

hbxrt/Cargo.toml

@@ -6,4 +6,16 @@ default-run = "hbxrt"
 
 [dependencies]
 hbvm.path = "../hbvm"
-nix       = { version = "0.27", features = ["mman", "signal"] }
+
+[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",
+]

hbxrt/src/main.rs

@@ -2,17 +2,23 @@
 
 #![deny(unsafe_op_in_unsafe_fn)]
 
-mod linux;
+#[cfg(unix)]
+#[path = "unix.rs"]
+mod platform;
+
+#[cfg(windows)]
+#[path = "win32.rs"]
+mod platform;
+
 mod mem;
 
 use {
     hbvm::{mem::Address, Vm, VmRunOk},
-    nix::sys::mman::{mmap, MapFlags, ProtFlags},
-    std::{env::args, fs::File, num::NonZeroUsize, process::exit},
+    std::{env::args, process::exit},
 };
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    eprintln!("== HB×RT (Holey Bytes Linux Runtime) v0.1 ==");
+    eprintln!("== HB×RT (Holey Bytes Experimental Runtime) v0.1 ==");
     eprintln!("[W] Currently supporting only flat images");
 
     let Some(image_path) = args().nth(1) else {
@@ -21,18 +27,18 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     };
 
     // Allocate stack
-    let stack_ptr = unsafe { linux::alloc_stack(1024 * 1024 * 2) }?;
+    let stack_ptr = unsafe { platform::alloc_stack(1024 * 1024 * 2) }?;
     eprintln!("[I] Stack allocated at {stack_ptr:p}");
 
     // Load program
     eprintln!("[I] Loading image from \"{image_path}\"");
-    let ptr = unsafe { linux::mmap_bytecode(image_path) }?;
+    let ptr = unsafe { platform::mmap_bytecode(image_path) }?;
     eprintln!("[I] Image loaded at {ptr:p}");
 
     let mut vm = unsafe { Vm::<_, 0>::new(mem::HostMemory, Address::new(ptr as u64)) };
     vm.write_reg(254, stack_ptr as u64);
 
-    unsafe { linux::hook_pagefault() }?;
+    unsafe { platform::catch_mafs() }?;
 
     // Execute program
     let stat = loop {

hbxrt/src/unix.rs

@@ -38,7 +38,7 @@ pub unsafe fn mmap_bytecode(path: impl AsRef<Path>) -> Result<*mut u8, Box<dyn s
 }
 
 /// Set handler for page fault
-pub unsafe fn hook_pagefault() -> nix::Result<()> {
+pub unsafe fn catch_mafs() -> nix::Result<()> {
     unsafe {
         use nix::sys::signal;
 

hbxrt/src/win32.rs

@@ -0,0 +1,69 @@
+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(())
+}