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This is one of action items in issue daniel5151#29.
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// TODO: Add proper `RegId` implementation. See [issue #29](https://github.com/daniel5151/gdbstub/issues/29) | ||
// pub enum X86RegId {} | ||
use crate::arch::RegId; | ||
use num_traits::cast::FromPrimitive; | ||
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/// FPU register identifier. | ||
#[derive(Debug, Clone, Copy, FromPrimitive)] | ||
pub enum X87FpuInternalRegId { | ||
/// Floating-point control register | ||
Fctrl, | ||
/// Floating-point status register | ||
Fstat, | ||
/// Tag word | ||
Ftag, | ||
/// FPU instruction pointer segment | ||
Fiseg, | ||
/// FPU intstruction pointer offset | ||
Fioff, | ||
/// FPU operand segment | ||
Foseg, | ||
/// FPU operand offset | ||
Fooff, | ||
/// Floating-point opcode | ||
Fop, | ||
} | ||
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/// 32-bit x86 core + SSE register identifier. | ||
/// | ||
/// 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, Clone, Copy)] | ||
#[non_exhaustive] | ||
pub enum X86CoreRegId { | ||
/// Accumulator | ||
Eax, | ||
/// Count register | ||
Ecx, | ||
/// Data register | ||
Edx, | ||
/// Base register | ||
Ebx, | ||
/// Stack pointer | ||
Esp, | ||
/// Base pointer | ||
Ebp, | ||
/// Source index | ||
Esi, | ||
/// Destination index | ||
Edi, | ||
/// Instruction pointer | ||
Eip, | ||
/// Status register | ||
Eflags, | ||
/// Segment registers: CS, SS, DS, ES, FS, GS | ||
Segment(u8), | ||
/// FPU registers: ST0 through ST7 | ||
St(u8), | ||
/// FPU internal registers | ||
Fpu(X87FpuInternalRegId), | ||
/// SIMD Registers: XMM0 through XMM7 | ||
Xmm(u8), | ||
/// SSE Status/Control Register | ||
Mxcsr, | ||
} | ||
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impl RegId for X86CoreRegId { | ||
fn from_raw_id(id: usize) -> Option<(Self, usize)> { | ||
use crate::arch::x86::reg::id::X86CoreRegId::*; | ||
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let r = match id { | ||
0 => (Eax, 4), | ||
1 => (Ecx, 4), | ||
2 => (Edx, 4), | ||
3 => (Ebx, 4), | ||
4 => (Esp, 4), | ||
5 => (Ebp, 4), | ||
6 => (Esi, 4), | ||
7 => (Edi, 4), | ||
8 => (Eip, 4), | ||
9 => (Eflags, 4), | ||
10..=15 => (Segment(id as u8 - 10), 4), | ||
16..=23 => (St(id as u8 - 16), 10), | ||
24..=31 => { | ||
// Safe because `(id as u8 - 24)` must be within `0..8`. | ||
let fpu_id = FromPrimitive::from_u8(id as u8 - 24).unwrap(); | ||
(Fpu(fpu_id), 4) | ||
} | ||
32..=39 => (Xmm(id as u8 - 32), 16), | ||
40 => (Mxcsr, 4), | ||
_ => return None, | ||
}; | ||
Some(r) | ||
} | ||
} | ||
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// TODO: Add proper `RegId` implementation. See [issue #29](https://github.com/daniel5151/gdbstub/issues/29) | ||
// pub enum X86_64RegId {} | ||
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#[cfg(test)] | ||
mod tests { | ||
use crate::arch::traits::RegId; | ||
use crate::arch::traits::Registers; | ||
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/// Compare the following two values which are expected to be the same: | ||
/// * length of data written by `Registers::gdb_serialize()` in byte | ||
/// * sum of sizes of all registers obtained by `RegId::from_raw_id()` | ||
fn test<Rs: Registers, RId: RegId>() { | ||
// Obtain the data length written by `gdb_serialize` by passing a custom | ||
// closure. | ||
let mut serialized_data_len = 0; | ||
let counter = |b: Option<u8>| { | ||
if b.is_some() { | ||
serialized_data_len += 1; | ||
} | ||
}; | ||
Rs::default().gdb_serialize(counter); | ||
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// Accumulate register sizes returned by `from_raw_id`. | ||
let mut i = 0; | ||
let mut sum_reg_sizes = 0; | ||
while let Some((_, size)) = RId::from_raw_id(i) { | ||
sum_reg_sizes += size; | ||
i += 1; | ||
} | ||
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assert_eq!(serialized_data_len, sum_reg_sizes); | ||
} | ||
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#[test] | ||
fn test_x86() { | ||
test::<crate::arch::x86::reg::X86CoreRegs, crate::arch::x86::reg::id::X86CoreRegId>() | ||
} | ||
} |
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