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arch: add i686 support

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Amaan Qureshi 2026-04-17 12:20:09 -04:00
commit a6fab02586
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4 changed files with 184 additions and 7 deletions
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23
crates/asm/src/lib.rs
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@ -6,8 +6,8 @@
//! faster?
//!
//! Supports `x86_64`, `aarch64`, `riscv64`, `loongarch64`, `s390x`,
//! `powerpc64`, `arm` (armv7), `riscv32`, `sparc64`, and `mips64`
//! architectures.
//! `powerpc64`, `arm` (armv7), `riscv32`, `sparc64`, `mips64`, and `x86`
//! (i686) architectures.
#![no_std]
#![cfg_attr(
@ -30,11 +30,12 @@
target_arch = "arm",
target_arch = "riscv32",
target_arch = "sparc64",
target_arch = "mips64"
target_arch = "mips64",
target_arch = "x86"
)))]
compile_error!(
"Unsupported architecture: only x86_64, aarch64, riscv64, loongarch64, \
s390x, powerpc64, arm, riscv32, sparc64, and mips64 are supported"
s390x, powerpc64, arm, riscv32, sparc64, mips64, and x86 are supported"
);
// Per-arch syscall implementations live in their own module files.
@ -68,6 +69,9 @@ mod arch;
#[cfg(target_arch = "mips64")]
#[path = "mips64.rs"]
mod arch;
#[cfg(target_arch = "x86")]
#[path = "x86.rs"]
mod arch;
/// Copies `n` bytes from `src` to `dest`.
///
@ -305,6 +309,7 @@ pub unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
target_arch = "s390x",
target_arch = "arm",
target_arch = "riscv32",
target_arch = "x86",
target_arch = "mips64"
)))]
pub struct StatfsBuf {
@ -347,7 +352,7 @@ pub struct StatfsBuf {
/// on armv7 `statfs64(2)` has 32-bit word fields; see
/// https://github.com/torvalds/linux/blob/v6.19/include/uapi/asm-generic/statfs.h
#[repr(C)]
#[cfg(any(target_arch = "arm", target_arch = "riscv32"))]
#[cfg(any(target_arch = "arm", target_arch = "riscv32", target_arch = "x86"))]
pub struct StatfsBuf {
pub f_type: u32,
pub f_bsize: u32,
@ -455,7 +460,11 @@ pub fn read_file_fast(path: &str, buffer: &mut [u8]) -> Result<usize, i32> {
/// The layout matches the kernel's `struct sysinfo` *exactly*:
/// `mem_unit` ends at offset 108, then 4 bytes of implicit padding to 112.
#[repr(C)]
#[cfg(not(any(target_arch = "arm", target_arch = "riscv32")))]
#[cfg(not(any(
target_arch = "arm",
target_arch = "riscv32",
target_arch = "x86"
)))]
pub struct SysInfo {
pub uptime: i64,
pub loads: [u64; 3],
@ -479,7 +488,7 @@ pub struct SysInfo {
/// on armv7 `__kernel_long_t` is 4 bytes; see
/// https://github.com/torvalds/linux/blob/v6.19/include/uapi/linux/sysinfo.h
#[repr(C)]
#[cfg(any(target_arch = "arm", target_arch = "riscv32"))]
#[cfg(any(target_arch = "arm", target_arch = "riscv32", target_arch = "x86"))]
pub struct SysInfo {
pub uptime: i32,
pub loads: [u32; 3],