mirror of
https://github.com/NotAShelf/microfetch.git
synced 2026-04-27 10:55:20 +00:00
asm: extract per-arch syscall impls into separate modules
The monolithic lib.rs had grown to 2600+ lines of `#[cfg(target_arch)]` blocks interleaved inside every `sys_*` function. Reading or modifying one arch's syscalls meant scrolling past thirteen others. Pull each arch's asm into `<arch>.rs`, re-exported via a single `#[cfg] #[path] mod arch;` so `lib.rs` only contains wrappers, structs, and module dispatch. Adding a new architecture now touches one new file plus one three-line mod decl.
This commit is contained in:
Amaan Qureshi
parent
136d5bcb58
commit
e77976b94b
6 changed files with 587 additions and 460 deletions
164
crates/asm/src/aarch64.rs
Normal file
164
crates/asm/src/aarch64.rs
Normal file
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@ -0,0 +1,164 @@
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//! Syscall implementations for `aarch64`.
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use super::{StatfsBuf, SysInfo, UtsNameBuf};
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pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
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unsafe {
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let fd: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 56i64, // SYS_openat
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in("x0") -100i32, // AT_FDCWD
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in("x1") path,
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in("x2") flags,
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in("x3") 0i32, // mode
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lateout("x0") fd,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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fd as i32
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}
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}
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}
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pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 63i64, // SYS_read
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in("x0") fd,
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in("x1") buf,
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in("x2") count,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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}
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pub(super) unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 64i64, // SYS_write
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in("x0") fd,
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in("x1") buf,
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in("x2") count,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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}
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pub(super) unsafe fn sys_close(fd: i32) -> i32 {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 57i64, // SYS_close
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in("x0") fd,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as i32
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}
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}
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}
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pub(super) unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 160i64, // SYS_uname
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in("x0") buf,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as i32
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}
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}
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}
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pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 43i64, // SYS_statfs
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in("x0") path,
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in("x1") buf,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as i32
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}
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}
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}
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pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 179_i64, // __NR_sysinfo
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in("x0") info,
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lateout("x0") ret,
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_sched_getaffinity(
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pid: i32,
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mask_size: usize,
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mask: *mut u8,
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) -> i32 {
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 123i64, // __NR_sched_getaffinity
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in("x0") pid,
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in("x1") mask_size,
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in("x2") mask,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as i32
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}
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}
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}
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pub(super) unsafe fn sys_exit(code: i32) -> ! {
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unsafe {
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core::arch::asm!(
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"svc #0",
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in("x8") 93i64, // SYS_exit
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in("x0") code,
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options(noreturn, nostack)
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);
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}
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}
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@ -19,6 +19,17 @@ compile_error!(
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"Unsupported architecture: only x86_64, aarch64, and riscv64 are supported"
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);
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// Per-arch syscall implementations live in their own module files.
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#[cfg(target_arch = "x86_64")]
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#[path = "x86_64.rs"]
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mod arch;
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#[cfg(target_arch = "aarch64")]
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#[path = "aarch64.rs"]
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mod arch;
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#[cfg(target_arch = "riscv64")]
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#[path = "riscv64.rs"]
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mod arch;
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/// Copies `n` bytes from `src` to `dest`.
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///
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/// # Safety
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@ -165,62 +176,7 @@ unsafe extern "C" {
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#[inline]
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#[must_use]
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pub unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
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#[cfg(target_arch = "x86_64")]
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unsafe {
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let fd: i64;
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core::arch::asm!(
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"syscall",
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in("rax") 2i64, // SYS_open
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in("rdi") path,
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in("rsi") flags,
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in("rdx") 0i32, // mode (not used for reading)
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lateout("rax") fd,
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lateout("rcx") _,
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lateout("r11") _,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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fd as i32
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}
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}
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#[cfg(target_arch = "aarch64")]
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unsafe {
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let fd: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 56i64, // SYS_openat
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in("x0") -100i32, // AT_FDCWD
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in("x1") path,
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in("x2") flags,
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in("x3") 0i32, // mode
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lateout("x0") fd,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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fd as i32
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}
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}
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#[cfg(target_arch = "riscv64")]
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unsafe {
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let fd: i64;
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core::arch::asm!(
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"ecall",
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in("a7") 56i64, // SYS_openat
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in("a0") -100i32, // AT_FDCWD
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in("a1") path,
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in("a2") flags,
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in("a3") 0i32, // mode
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lateout("a0") fd,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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fd as i32
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}
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}
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unsafe { arch::sys_open(path, flags) }
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}
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/// Direct syscall to read from a file descriptor
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@ -237,64 +193,7 @@ pub unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
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/// - `fd` is a valid open file descriptor
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#[inline]
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pub unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
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#[cfg(target_arch = "x86_64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"syscall",
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in("rax") 0i64, // SYS_read
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in("rdi") fd,
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in("rsi") buf,
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in("rdx") count,
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lateout("rax") ret,
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lateout("rcx") _,
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lateout("r11") _,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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#[cfg(target_arch = "aarch64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 63i64, // SYS_read
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in("x0") fd,
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in("x1") buf,
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in("x2") count,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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#[cfg(target_arch = "riscv64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"ecall",
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in("a7") 63i64, // SYS_read
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in("a0") fd,
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in("a1") buf,
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in("a2") count,
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lateout("a0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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unsafe { arch::sys_read(fd, buf, count) }
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}
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/// Direct syscall to write to a file descriptor
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@ -312,64 +211,7 @@ pub unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
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#[inline]
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#[must_use]
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pub unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
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#[cfg(target_arch = "x86_64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"syscall",
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in("rax") 1i64, // SYS_write
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in("rdi") fd,
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in("rsi") buf,
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in("rdx") count,
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lateout("rax") ret,
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lateout("rcx") _,
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lateout("r11") _,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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#[cfg(target_arch = "aarch64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"svc #0",
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in("x8") 64i64, // SYS_write
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in("x0") fd,
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in("x1") buf,
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in("x2") count,
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lateout("x0") ret,
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options(nostack)
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);
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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#[cfg(target_arch = "riscv64")]
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unsafe {
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let ret: i64;
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core::arch::asm!(
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"ecall",
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in("a7") 64i64, // SYS_write
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in("a0") fd,
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in("a1") buf,
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in("a2") count,
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lateout("a0") ret,
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options(nostack)
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);
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|
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#[allow(clippy::cast_possible_truncation)]
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{
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ret as isize
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}
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}
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unsafe { arch::sys_write(fd, buf, count) }
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}
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|
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/// Direct syscall to close a file descriptor
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|
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@ -380,55 +222,7 @@ pub unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
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#[inline]
|
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#[must_use]
|
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pub unsafe fn sys_close(fd: i32) -> i32 {
|
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#[cfg(target_arch = "x86_64")]
|
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unsafe {
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let ret: i64;
|
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core::arch::asm!(
|
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"syscall",
|
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in("rax") 3i64, // SYS_close
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in("rdi") fd,
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lateout("rax") ret,
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lateout("rcx") _,
|
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lateout("r11") _,
|
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options(nostack)
|
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);
|
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#[allow(clippy::cast_possible_truncation)]
|
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{
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ret as i32
|
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}
|
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}
|
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|
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#[cfg(target_arch = "aarch64")]
|
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unsafe {
|
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let ret: i64;
|
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core::arch::asm!(
|
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"svc #0",
|
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in("x8") 57i64, // SYS_close
|
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in("x0") fd,
|
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lateout("x0") ret,
|
||||
options(nostack)
|
||||
);
|
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#[allow(clippy::cast_possible_truncation)]
|
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{
|
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ret as i32
|
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}
|
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}
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|
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#[cfg(target_arch = "riscv64")]
|
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unsafe {
|
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let ret: i64;
|
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core::arch::asm!(
|
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"ecall",
|
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in("a7") 57i64, // SYS_close
|
||||
in("a0") fd,
|
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lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
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ret as i32
|
||||
}
|
||||
}
|
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unsafe { arch::sys_close(fd) }
|
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}
|
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|
||||
/// Raw buffer for the `uname(2)` syscall.
|
||||
|
|
@ -459,57 +253,7 @@ pub struct UtsNameBuf {
|
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#[inline]
|
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#[allow(dead_code)]
|
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pub unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
|
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#[cfg(target_arch = "x86_64")]
|
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unsafe {
|
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let ret: i64;
|
||||
core::arch::asm!(
|
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"syscall",
|
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in("rax") 63i64, // SYS_uname
|
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in("rdi") buf,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "aarch64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"svc #0",
|
||||
in("x8") 160i64, // SYS_uname
|
||||
in("x0") buf,
|
||||
lateout("x0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "riscv64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 160i64, // SYS_uname
|
||||
in("a0") buf,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
unsafe { arch::sys_uname(buf) }
|
||||
}
|
||||
|
||||
/// Raw buffer for the `statfs(2)` syscall.
|
||||
|
|
@ -549,61 +293,7 @@ pub struct StatfsBuf {
|
|||
/// - `buf` points to a valid `StatfsBuf`
|
||||
#[inline]
|
||||
pub unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 137i64, // SYS_statfs
|
||||
in("rdi") path,
|
||||
in("rsi") buf,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "aarch64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"svc #0",
|
||||
in("x8") 43i64, // SYS_statfs
|
||||
in("x0") path,
|
||||
in("x1") buf,
|
||||
lateout("x0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "riscv64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 43i64, // SYS_statfs
|
||||
in("a0") path,
|
||||
in("a1") buf,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
unsafe { arch::sys_statfs(path, buf) }
|
||||
}
|
||||
|
||||
/// Read entire file using direct syscalls. This avoids libc overhead and can be
|
||||
|
|
@ -689,46 +379,7 @@ pub struct SysInfo {
|
|||
/// The caller must ensure that `info` points to a valid `SysInfo` buffer.
|
||||
#[inline]
|
||||
pub unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 99_i64, // __NR_sysinfo
|
||||
in("rdi") info,
|
||||
out("rcx") _,
|
||||
out("r11") _,
|
||||
lateout("rax") ret,
|
||||
options(nostack)
|
||||
);
|
||||
ret
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "aarch64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"svc #0",
|
||||
in("x8") 179_i64, // __NR_sysinfo
|
||||
in("x0") info,
|
||||
lateout("x0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
ret
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "riscv64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 179_i64, // __NR_sysinfo
|
||||
in("a0") info,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
ret
|
||||
}
|
||||
unsafe { arch::sys_sysinfo(info) }
|
||||
}
|
||||
|
||||
/// Direct `sched_getaffinity(2)` syscall
|
||||
|
|
@ -748,61 +399,7 @@ pub unsafe fn sys_sched_getaffinity(
|
|||
mask_size: usize,
|
||||
mask: *mut u8,
|
||||
) -> i32 {
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 204i64, // __NR_sched_getaffinity
|
||||
in("rdi") pid,
|
||||
in("rsi") mask_size,
|
||||
in("rdx") mask,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "aarch64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"svc #0",
|
||||
in("x8") 123i64, // __NR_sched_getaffinity
|
||||
in("x0") pid,
|
||||
in("x1") mask_size,
|
||||
in("x2") mask,
|
||||
lateout("x0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "riscv64")]
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 123i64, // __NR_sched_getaffinity
|
||||
in("a0") pid,
|
||||
in("a1") mask_size,
|
||||
in("a2") mask,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
unsafe { arch::sys_sched_getaffinity(pid, mask_size, mask) }
|
||||
}
|
||||
|
||||
/// Direct syscall to exit the process
|
||||
|
|
@ -812,33 +409,5 @@ pub unsafe fn sys_sched_getaffinity(
|
|||
/// This syscall never returns. The process will terminate immediately.
|
||||
#[inline]
|
||||
pub unsafe fn sys_exit(code: i32) -> ! {
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
unsafe {
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 60i64, // SYS_exit
|
||||
in("rdi") code,
|
||||
options(noreturn, nostack)
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "aarch64")]
|
||||
unsafe {
|
||||
core::arch::asm!(
|
||||
"svc #0",
|
||||
in("x8") 93i64, // SYS_exit
|
||||
in("x0") code,
|
||||
options(noreturn, nostack)
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(target_arch = "riscv64")]
|
||||
unsafe {
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 93i64, // SYS_exit
|
||||
in("a0") code,
|
||||
options(noreturn, nostack)
|
||||
);
|
||||
}
|
||||
unsafe { arch::sys_exit(code) }
|
||||
}
|
||||
|
|
|
|||
166
crates/asm/src/riscv64.rs
Normal file
166
crates/asm/src/riscv64.rs
Normal file
|
|
@ -0,0 +1,166 @@
|
|||
//! Syscall implementations for `riscv64`.
|
||||
|
||||
use super::{StatfsBuf, SysInfo, UtsNameBuf};
|
||||
|
||||
pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
|
||||
unsafe {
|
||||
let fd: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 56i64, // SYS_openat
|
||||
in("a0") -100i32, // AT_FDCWD
|
||||
in("a1") path,
|
||||
in("a2") flags,
|
||||
in("a3") 0i32, // mode
|
||||
lateout("a0") fd,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
fd as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 63i64, // SYS_read
|
||||
in("a0") fd,
|
||||
in("a1") buf,
|
||||
in("a2") count,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as isize
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 64i64, // SYS_write
|
||||
in("a0") fd,
|
||||
in("a1") buf,
|
||||
in("a2") count,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as isize
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_close(fd: i32) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 57i64, // SYS_close
|
||||
in("a0") fd,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 160i64, // SYS_uname
|
||||
in("a0") buf,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 43i64, // SYS_statfs
|
||||
in("a0") path,
|
||||
in("a1") buf,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 179_i64, // __NR_sysinfo
|
||||
in("a0") info,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
ret
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_sched_getaffinity(
|
||||
pid: i32,
|
||||
mask_size: usize,
|
||||
mask: *mut u8,
|
||||
) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 123i64, // __NR_sched_getaffinity
|
||||
in("a0") pid,
|
||||
in("a1") mask_size,
|
||||
in("a2") mask,
|
||||
lateout("a0") ret,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_exit(code: i32) -> ! {
|
||||
unsafe {
|
||||
core::arch::asm!(
|
||||
"ecall",
|
||||
in("a7") 93i64, // SYS_exit
|
||||
in("a0") code,
|
||||
options(noreturn, nostack)
|
||||
);
|
||||
}
|
||||
}
|
||||
180
crates/asm/src/x86_64.rs
Normal file
180
crates/asm/src/x86_64.rs
Normal file
|
|
@ -0,0 +1,180 @@
|
|||
//! Syscall implementations for `x86_64`.
|
||||
|
||||
use super::{StatfsBuf, SysInfo, UtsNameBuf};
|
||||
|
||||
pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
|
||||
unsafe {
|
||||
let fd: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 2i64, // SYS_open
|
||||
in("rdi") path,
|
||||
in("rsi") flags,
|
||||
in("rdx") 0i32, // mode (not used for reading)
|
||||
lateout("rax") fd,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
fd as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 0i64, // SYS_read
|
||||
in("rdi") fd,
|
||||
in("rsi") buf,
|
||||
in("rdx") count,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as isize
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 1i64, // SYS_write
|
||||
in("rdi") fd,
|
||||
in("rsi") buf,
|
||||
in("rdx") count,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as isize
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_close(fd: i32) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 3i64, // SYS_close
|
||||
in("rdi") fd,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 63i64, // SYS_uname
|
||||
in("rdi") buf,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 137i64, // SYS_statfs
|
||||
in("rdi") path,
|
||||
in("rsi") buf,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 99_i64, // __NR_sysinfo
|
||||
in("rdi") info,
|
||||
out("rcx") _,
|
||||
out("r11") _,
|
||||
lateout("rax") ret,
|
||||
options(nostack)
|
||||
);
|
||||
ret
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_sched_getaffinity(
|
||||
pid: i32,
|
||||
mask_size: usize,
|
||||
mask: *mut u8,
|
||||
) -> i32 {
|
||||
unsafe {
|
||||
let ret: i64;
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 204i64, // __NR_sched_getaffinity
|
||||
in("rdi") pid,
|
||||
in("rsi") mask_size,
|
||||
in("rdx") mask,
|
||||
lateout("rax") ret,
|
||||
lateout("rcx") _,
|
||||
lateout("r11") _,
|
||||
options(nostack)
|
||||
);
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
{
|
||||
ret as i32
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(super) unsafe fn sys_exit(code: i32) -> ! {
|
||||
unsafe {
|
||||
core::arch::asm!(
|
||||
"syscall",
|
||||
in("rax") 60i64, // SYS_exit
|
||||
in("rdi") code,
|
||||
options(noreturn, nostack)
|
||||
);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue