From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
---
vendor/redox_syscall/src/arch/x86.rs | 184 +++++++++++++++++++++++++++++++++++
1 file changed, 184 insertions(+)
create mode 100644 vendor/redox_syscall/src/arch/x86.rs
(limited to 'vendor/redox_syscall/src/arch/x86.rs')
diff --git a/vendor/redox_syscall/src/arch/x86.rs b/vendor/redox_syscall/src/arch/x86.rs
new file mode 100644
index 0000000..54d8c0a
--- /dev/null
+++ b/vendor/redox_syscall/src/arch/x86.rs
@@ -0,0 +1,184 @@
+use core::{mem, slice};
+use core::arch::asm;
+use core::ops::{Deref, DerefMut};
+
+use super::error::{Error, Result};
+
+pub const PAGE_SIZE: usize = 4096;
+
+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(Copy, Clone, Debug, Default)]
+#[repr(C)]
+pub struct IntRegisters {
+ // TODO: Some of these don't get set by Redox yet. Should they?
+
+ pub ebp: usize,
+ pub esi: usize,
+ pub edi: usize,
+ pub ebx: usize,
+ pub eax: usize,
+ pub ecx: usize,
+ pub edx: usize,
+ // pub orig_rax: usize,
+ pub eip: usize,
+ pub cs: usize,
+ pub eflags: usize,
+ pub esp: usize,
+ pub ss: usize,
+ // pub fs_base: usize,
+ // pub gs_base: usize,
+ // pub ds: usize,
+ // pub es: usize,
+ pub fs: usize,
+ // pub gs: usize
+}
+
+impl Deref for IntRegisters {
+ type Target = [u8];
+ fn deref(&self) -> &[u8] {
+ unsafe {
+ slice::from_raw_parts(self as *const IntRegisters as *const u8, mem::size_of::<IntRegisters>())
+ }
+ }
+}
+
+impl DerefMut for IntRegisters {
+ fn deref_mut(&mut self) -> &mut [u8] {
+ unsafe {
+ slice::from_raw_parts_mut(self as *mut IntRegisters as *mut u8, mem::size_of::<IntRegisters>())
+ }
+ }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+#[repr(packed)]
+pub struct FloatRegisters {
+ pub fcw: u16,
+ pub fsw: u16,
+ pub ftw: u8,
+ pub _reserved: u8,
+ pub fop: u16,
+ pub fip: u64,
+ pub fdp: u64,
+ pub mxcsr: u32,
+ pub mxcsr_mask: u32,
+ pub st_space: [u128; 8],
+ pub xmm_space: [u128; 16],
+ // TODO: YMM/ZMM
+}
+
+impl Deref for FloatRegisters {
+ type Target = [u8];
+ fn deref(&self) -> &[u8] {
+ unsafe {
+ slice::from_raw_parts(self as *const FloatRegisters as *const u8, mem::size_of::<FloatRegisters>())
+ }
+ }
+}
+
+impl DerefMut for FloatRegisters {
+ fn deref_mut(&mut self) -> &mut [u8] {
+ unsafe {
+ slice::from_raw_parts_mut(self as *mut FloatRegisters as *mut u8, mem::size_of::<FloatRegisters>())
+ }
+ }
+}
+
+#[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>())
+ }
+ }
+}
--
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