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Use unsafe blocks in platform module

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This commit is contained in:
sourceturner
2026-01-18 21:51:33 +01:00
parent 0f23c03ba4
commit 2d5ac47214
4 changed files with 84 additions and 66 deletions
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src/platform/linux/mod.rs
+46 -41
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@@ -1,3 +1,6 @@
// TODO: set this for entire crate when possible
#![deny(unsafe_op_in_unsafe_fn)]
use core::{arch::asm, num::NonZeroU64, ptr};
use super::{ERRNO, Pal, types::*};
@@ -343,7 +346,7 @@ impl Pal for Sys {
}
unsafe fn dent_reclen_offset(this_dent: &[u8], offset: usize) -> Option<(u16, u64)> {
let dent = this_dent.as_ptr().cast::<dirent>();
Some(((*dent).d_reclen, (*dent).d_off as u64))
Some((unsafe { (*dent).d_reclen }, unsafe { (*dent).d_off } as u64))
}
fn getegid() -> gid_t {
@@ -638,52 +641,54 @@ impl Pal for Sys {
) -> Result<crate::pthread::OsTid> {
let flags = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | CLONE_THREAD;
let pid;
asm!("
# Call clone syscall
syscall
unsafe {
asm!("
# Call clone syscall
syscall
# Check if child or parent
test rax, rax
jnz 2f
# Check if child or parent
test rax, rax
jnz 2f
# Load registers
pop rax
pop rdi
pop rsi
pop rdx
pop rcx
pop r8
pop r9
# Load registers
pop rax
pop rdi
pop rsi
pop rdx
pop rcx
pop r8
pop r9
# Call entry point
call rax
# Call entry point
call rax
# Exit
mov rax, 60
xor rdi, rdi
syscall
# Exit
mov rax, 60
xor rdi, rdi
syscall
# Invalid instruction on failure to exit
ud2
# Invalid instruction on failure to exit
ud2
# Return PID if parent
2:
",
inout("rax") SYS_CLONE => pid,
inout("rdi") flags => _,
inout("rsi") stack => _,
inout("rdx") 0 => _,
inout("r10") 0 => _,
inout("r8") 0 => _,
//TODO: out("rbx") _,
out("rcx") _,
out("r9") _,
out("r11") _,
out("r12") _,
out("r13") _,
out("r14") _,
out("r15") _,
);
# Return PID if parent
2:
",
inout("rax") SYS_CLONE => pid,
inout("rdi") flags => _,
inout("rsi") stack => _,
inout("rdx") 0 => _,
inout("r10") 0 => _,
inout("r8") 0 => _,
//TODO: out("rbx") _,
out("rcx") _,
out("r9") _,
out("r11") _,
out("r12") _,
out("r13") _,
out("r14") _,
out("r15") _,
);
}
let tid = e_raw(pid)?;
Ok(crate::pthread::OsTid { thread_id: tid })