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arch: add powerpc32 support

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Amaan Qureshi 2026-04-17 12:32:03 -04:00
commit 7bbc47eb9f
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4 changed files with 225 additions and 7 deletions
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180
crates/asm/src/powerpc.rs Normal file
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@ -0,0 +1,180 @@
//! Syscall implementations for `powerpc`.
use super::{StatfsBuf, SysInfo, UtsNameBuf};
pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 5i32 => _, // SYS_open
inlateout("r3") path => ret,
inlateout("r4") flags => _,
inlateout("r5") 0i32 => _,
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 3i32 => _, // SYS_read
inlateout("r3") fd => 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)
);
ret as isize
}
}
pub(super) unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 4i32 => _, // SYS_write
inlateout("r3") fd => 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)
);
ret as isize
}
}
pub(super) unsafe fn sys_close(fd: i32) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 6i32 => _, // SYS_close
inlateout("r3") fd => 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_uname(buf: *mut UtsNameBuf) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 122i32 => _, // SYS_newuname
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)
);
ret
}
}
pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 252i32 => _, // SYS_statfs64
inlateout("r3") path => ret,
inlateout("r4") core::mem::size_of::<StatfsBuf>() => _,
inlateout("r5") buf => _,
out("r6") _, out("r7") _, out("r8") _,
out("r9") _, out("r10") _, out("r11") _, out("r12") _,
out("cr0") _,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 116_i32 => _, // __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)
);
i64::from(ret)
}
}
pub(super) unsafe fn sys_sched_getaffinity(
pid: i32,
mask_size: usize,
mask: *mut u8,
) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"sc",
"bns+ 2f",
"neg 3, 3",
"2:",
inlateout("r0") 223i32 => _, // __NR_sched_getaffinity
inlateout("r3") pid => 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)
);
ret
}
}
pub(super) unsafe fn sys_exit(code: i32) -> ! {
unsafe {
core::arch::asm!(
"li 0, 1", // SYS_exit
"sc",
in("r3") code,
options(noreturn, nostack)
);
}
}