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arch: add sparc32 support

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Amaan Qureshi 2026-04-17 12:42:13 -04:00
commit 205e637d89
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3 changed files with 214 additions and 7 deletions
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165
crates/asm/src/sparc.rs Normal file
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//! Syscall implementations for `sparc`.
use super::{StatfsBuf, SysInfo, UtsNameBuf};
pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 5i32, // SYS_open
inlateout("o0") path => ret,
in("o1") flags,
in("o2") 0i32, // mode
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 3i32, // SYS_read
inlateout("o0") fd => ret,
in("o1") buf,
in("o2") count,
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!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 4i32, // SYS_write
inlateout("o0") fd => ret,
in("o1") buf,
in("o2") count,
options(nostack)
);
ret as isize
}
}
pub(super) unsafe fn sys_close(fd: i32) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 6i32, // SYS_close
inlateout("o0") fd => ret,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 189i32, // SYS_newuname
inlateout("o0") buf => ret,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 234i32, // SYS_statfs64
inlateout("o0") path => ret,
in("o1") core::mem::size_of::<StatfsBuf>(),
in("o2") buf,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
unsafe {
let ret: i32;
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 214_i32, // __NR_sysinfo
inlateout("o0") info => ret,
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!(
"mov {nr}, %g1",
"ta 0x10",
"bcs,a 1f",
"sub %g0, %o0, %o0",
"1:",
nr = in(reg) 260i32, // __NR_sched_getaffinity
inlateout("o0") pid => ret,
in("o1") mask_size,
in("o2") mask,
options(nostack)
);
ret
}
}
pub(super) unsafe fn sys_exit(code: i32) -> ! {
unsafe {
core::arch::asm!(
"mov {nr}, %g1",
"ta 0x10",
nr = in(reg) 1i32, // SYS_exit
in("o0") code,
options(noreturn, nostack)
);
}
}