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treewide: going no_std

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Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ia1c001eb099ea8cae9bdf76642b873376a6a6964
This commit is contained in:
raf 2026-03-27 17:29:49 +03:00
commit 472dbfc7e7
Signed by: NotAShelf
GPG key ID: 29D95B64378DB4BF
14 changed files with 856 additions and 143 deletions
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39
crates/asm/src/lib.rs
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@ -507,6 +507,7 @@ pub fn read_file_fast(path: &str, buffer: &mut [u8]) -> Result<usize, i32> {
let _ = sys_close(fd);
if bytes_read < 0 {
#[allow(clippy::cast_possible_truncation)]
return Err(bytes_read as i32);
}
@ -598,3 +599,41 @@ pub unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
ret
}
}
/// Direct syscall to exit the process
///
/// # Safety
///
/// 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)
);
}
}