/
core32.rs
137 lines (113 loc) · 3.62 KB
/
core32.rs
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use core::convert::TryInto;
use crate::arch::x86::reg::{X87FpuInternalRegs, F80};
use crate::arch::RawRegId;
use crate::arch::Registers;
/// 32-bit x86 core registers (+ SSE extensions).
///
/// Source: https://github.com/bminor/binutils-gdb/blob/master/gdb/features/i386/32bit-core.xml
/// Additionally: https://github.com/bminor/binutils-gdb/blob/master/gdb/features/i386/32bit-sse.xml
#[derive(Debug, Default, Clone)]
pub struct X86CoreRegs {
/// Accumulator
pub eax: u32,
/// Count register
pub ecx: u32,
/// Data register
pub edx: u32,
/// Base register
pub ebx: u32,
/// Stack pointer
pub esp: u32,
/// Base pointer
pub ebp: u32,
/// Source index
pub esi: u32,
/// Destination index
pub edi: u32,
/// Instruction pointer
pub eip: u32,
/// Status register
pub eflags: u32,
/// Segment registers: CS, SS, DS, ES, FS, GS
pub segments: [u32; 6],
/// FPU registers: ST0 through ST7
pub st: [F80; 8],
/// FPU internal registers
pub fpu: X87FpuInternalRegs,
/// SIMD Registers: XMM0 through XMM7
pub xmm: [u128; 8],
/// SSE Status/Control Register
pub mxcsr: u32,
}
impl Registers for X86CoreRegs {
type RegId = RawRegId;
fn gdb_serialize(&self, mut write_byte: impl FnMut(Option<u8>)) {
macro_rules! write_bytes {
($bytes:expr) => {
for b in $bytes {
write_byte(Some(*b))
}
};
}
macro_rules! write_regs {
($($reg:ident),*) => {
$(
write_bytes!(&self.$reg.to_le_bytes());
)*
}
}
write_regs!(eax, ecx, edx, ebx, esp, ebp, esi, edi, eip, eflags);
// cs, ss, ds, es, fs, gs
for seg in &self.segments {
write_bytes!(&seg.to_le_bytes());
}
// st0 to st7
for st_reg in &self.st {
write_bytes!(st_reg);
}
self.fpu.gdb_serialize(&mut write_byte);
// xmm0 to xmm15
for xmm_reg in &self.xmm {
write_bytes!(&xmm_reg.to_le_bytes());
}
// mxcsr
write_bytes!(&self.mxcsr.to_le_bytes());
// padding
(0..4).for_each(|_| write_byte(None))
}
fn gdb_deserialize(&mut self, bytes: &[u8]) -> Result<(), ()> {
if bytes.len() < 0x138 {
return Err(());
}
macro_rules! parse_regs {
($($reg:ident),*) => {
let mut regs = bytes[0..0x28]
.chunks_exact(4)
.map(|x| u32::from_le_bytes(x.try_into().unwrap()));
$(
self.$reg = regs.next().ok_or(())?;
)*
}
}
parse_regs!(eax, ecx, edx, ebx, esp, ebp, esi, edi, eip, eflags);
let mut segments = bytes[0x28..0x40]
.chunks_exact(4)
.map(|x| u32::from_le_bytes(x.try_into().unwrap()));
for seg in self.segments.iter_mut() {
*seg = segments.next().ok_or(())?;
}
let mut regs = bytes[0x40..0x90].chunks_exact(10).map(TryInto::try_into);
for reg in self.st.iter_mut() {
*reg = regs.next().ok_or(())?.map_err(|_| ())?;
}
self.fpu.gdb_deserialize(&bytes[0x90..0xb0])?;
let mut regs = bytes[0xb0..0x130]
.chunks_exact(0x10)
.map(|x| u128::from_le_bytes(x.try_into().unwrap()));
for reg in self.xmm.iter_mut() {
*reg = regs.next().ok_or(())?;
}
self.mxcsr = u32::from_le_bytes(bytes[0x130..0x134].try_into().unwrap());
Ok(())
}
}