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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:06:31 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:06:31 +0000 |
commit | 2ff14448863ac1a1dd9533461708e29aae170c2d (patch) | |
tree | 85b9fea2bbfe3f06473cfa381eed11f273b57c5c /vendor/redox_syscall/src/arch/x86.rs | |
parent | Adding debian version 1.64.0+dfsg1-1. (diff) | |
download | rustc-2ff14448863ac1a1dd9533461708e29aae170c2d.tar.xz rustc-2ff14448863ac1a1dd9533461708e29aae170c2d.zip |
Adding debian version 1.65.0+dfsg1-2.debian/1.65.0+dfsg1-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/redox_syscall/src/arch/x86.rs')
-rw-r--r-- | vendor/redox_syscall/src/arch/x86.rs | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/vendor/redox_syscall/src/arch/x86.rs b/vendor/redox_syscall/src/arch/x86.rs new file mode 100644 index 000000000..2f9301e0e --- /dev/null +++ b/vendor/redox_syscall/src/arch/x86.rs @@ -0,0 +1,105 @@ +use core::{mem, slice}; +use core::arch::asm; +use core::ops::{Deref, DerefMut}; + +use super::error::{Error, Result}; + +macro_rules! syscall { + ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => { + $( + pub unsafe fn $name(mut $a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> { + asm!( + "int 0x80", + inout("eax") $a, + $( + in("ebx") $b, + $( + in("ecx") $c, + $( + in("edx") $d, + $( + in("esi") $e, + $( + in("edi") $f, + )? + )? + )? + )? + )? + options(nostack), + ); + + Error::demux($a) + } + )+ + }; +} + +syscall! { + syscall0(a,); + syscall1(a, b,); + syscall2(a, b, c,); + syscall3(a, b, c, d,); + // Must be done custom because LLVM reserves ESI + //syscall4(a, b, c, d, e,); + //syscall5(a, b, c, d, e, f,); +} + +pub unsafe fn syscall4(mut a: usize, b: usize, c: usize, d: usize, e: usize) + -> Result<usize> { + asm!( + "xchg esi, {e} + int 0x80 + xchg esi, {e}", + e = in(reg) e, + inout("eax") a, + in("ebx") b, + in("ecx") c, + in("edx") d, + options(nostack), + ); + + Error::demux(a) +} + +pub unsafe fn syscall5(mut a: usize, b: usize, c: usize, d: usize, e: usize, f: usize) + -> Result<usize> { + asm!( + "xchg esi, {e} + int 0x80 + xchg esi, {e}", + e = in(reg) e, + inout("eax") a, + in("ebx") b, + in("ecx") c, + in("edx") d, + in("edi") f, + options(nostack), + ); + + Error::demux(a) +} + +#[derive(Clone, Copy, Debug, Default)] +#[repr(packed)] +pub struct EnvRegisters { + pub fsbase: u32, + pub gsbase: u32, +} + +impl Deref for EnvRegisters { + type Target = [u8]; + fn deref(&self) -> &[u8] { + unsafe { + slice::from_raw_parts(self as *const EnvRegisters as *const u8, mem::size_of::<EnvRegisters>()) + } + } +} + +impl DerefMut for EnvRegisters { + fn deref_mut(&mut self) -> &mut [u8] { + unsafe { + slice::from_raw_parts_mut(self as *mut EnvRegisters as *mut u8, mem::size_of::<EnvRegisters>()) + } + } +} |