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arch: add powerpc64 support

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Amaan Qureshi 2026-04-16 18:23:22 -04:00
commit 03e6d1f4cf
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5 changed files with 280 additions and 11 deletions
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15
crates/asm/src/lib.rs
View file

@ -5,10 +5,11 @@
//! What do you mean I wasted two whole hours to make the program only 100µs
//! faster?
//!
//! Supports `x86_64`, `aarch64`, `riscv64`, `loongarch64`, and `s390x`
//! architectures.
//! Supports `x86_64`, `aarch64`, `riscv64`, `loongarch64`, `s390x`, and
//! `powerpc64` architectures.
#![no_std]
#![cfg_attr(target_arch = "powerpc64", feature(asm_experimental_arch))]
// Ensure we're compiling for a supported architecture.
#[cfg(not(any(
@ -16,11 +17,12 @@
target_arch = "aarch64",
target_arch = "riscv64",
target_arch = "loongarch64",
target_arch = "s390x"
target_arch = "s390x",
target_arch = "powerpc64"
)))]
compile_error!(
"Unsupported architecture: only x86_64, aarch64, riscv64, loongarch64, and \
s390x are supported"
"Unsupported architecture: only x86_64, aarch64, riscv64, loongarch64, \
s390x, and powerpc64 are supported"
);
// Per-arch syscall implementations live in their own module files.
@ -39,6 +41,9 @@ mod arch;
#[cfg(target_arch = "s390x")]
#[path = "s390x.rs"]
mod arch;
#[cfg(target_arch = "powerpc64")]
#[path = "powerpc64.rs"]
mod arch;
/// Copies `n` bytes from `src` to `dest`.
///

200
crates/asm/src/powerpc64.rs Normal file
View file

@ -0,0 +1,200 @@
//! Syscall implementations for `powerpc64`.
use super::{StatfsBuf, SysInfo, UtsNameBuf};
pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
unsafe {
let ret: i64;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 5i64 => _, // SYS_open
inlateout("r3") path => ret,
inlateout("r4") flags => _,
inlateout("r5") 0i32 => _, // mode
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
options(nostack)
);
#[allow(clippy::cast_possible_truncation)]
{
ret as i32
}
}
}
pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
unsafe {
let ret: i64;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 3i64 => _, // SYS_read
inlateout("r3") fd as i64 => ret,
inlateout("r4") buf => _,
inlateout("r5") count => _,
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 4i64 => _, // SYS_write
inlateout("r3") fd as i64 => ret,
inlateout("r4") buf => _,
inlateout("r5") count => _,
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 6i64 => _, // SYS_close
inlateout("r3") fd as i64 => ret,
out("r4") _, out("r5") _, out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 122i64 => _, // SYS_uname
inlateout("r3") buf => ret,
out("r4") _, out("r5") _, out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 99i64 => _, // SYS_statfs
inlateout("r3") path => ret,
inlateout("r4") buf => _,
out("r5") _, out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 116_i64 => _, // __NR_sysinfo
inlateout("r3") info => ret,
out("r4") _, out("r5") _, out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
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!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 223i64 => _, // __NR_sched_getaffinity
inlateout("r3") pid as i64 => ret,
inlateout("r4") mask_size => _,
inlateout("r5") mask => _,
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
options(nostack)
);
#[allow(clippy::cast_possible_truncation)]
{
ret as i32
}
}
}
pub(super) unsafe fn sys_exit(code: i32) -> ! {
unsafe {
core::arch::asm!(
"li 0, 1", // SYS_exit
"sc",
in("r3") code,
options(noreturn, nostack)
);
}
}