120 lines
3.4 KiB
Rust
120 lines
3.4 KiB
Rust
unsafe extern "C" {
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// unsafe fn parse_gpr(src: *mut Source, prefix: u8) -> (u64, u64);
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// unsafe fn parse_reg(src: *mut Source) -> (u64, u64);
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unsafe fn try_parse_reg() -> (usize, Register);
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#[link_name = "buf"]
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static mut BUF: [u8; 0x100];
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}
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#[repr(C)]
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#[derive(Debug, PartialEq, Eq)]
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struct Register {
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size: u32,
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num: u32,
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}
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impl Register {
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fn new(num: u32, size: u32) -> Self {
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Self {
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num,
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size: size.ilog2(),
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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fn write_to_buf(b: &[u8]) {
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assert!(b.len() <= 0x100, "Buffer overflow");
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unsafe {
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core::ptr::copy_nonoverlapping(b.as_ptr(), (&raw mut BUF).cast(), b.len());
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}
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}
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#[test]
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fn parse_reg() {
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let cases = [
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(&b"rax"[..], (0, 8)),
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(&b"rcx"[..], (1, 8)),
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(&b"rdx"[..], (2, 8)),
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(&b"rbx"[..], (3, 8)),
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(&b"rsp"[..], (4, 8)),
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(&b"rbp"[..], (5, 8)),
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(&b"rsi"[..], (6, 8)),
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(&b"rdi"[..], (7, 8)),
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(&b"r8"[..], (8, 8)),
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(&b"r9"[..], (9, 8)),
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(&b"r10"[..], (10, 8)),
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(&b"r11"[..], (11, 8)),
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(&b"r12"[..], (12, 8)),
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(&b"r13"[..], (13, 8)),
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(&b"r14"[..], (14, 8)),
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(&b"r15"[..], (15, 8)),
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(&b"rip"[..], (!0, 8)),
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(&b"eax"[..], (0, 4)),
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(&b"ecx"[..], (1, 4)),
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(&b"edx"[..], (2, 4)),
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(&b"ebx"[..], (3, 4)),
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(&b"esp"[..], (4, 4)),
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(&b"ebp"[..], (5, 4)),
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(&b"esi"[..], (6, 4)),
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(&b"edi"[..], (7, 4)),
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(&b"r8d"[..], (8, 4)),
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(&b"r9d"[..], (9, 4)),
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(&b"r10d"[..], (10, 4)),
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(&b"r11d"[..], (11, 4)),
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(&b"r12d"[..], (12, 4)),
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(&b"r13d"[..], (13, 4)),
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(&b"r14d"[..], (14, 4)),
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(&b"r15d"[..], (15, 4)),
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(&b"r8w"[..], (8, 2)),
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(&b"r9w"[..], (9, 2)),
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(&b"r10w"[..], (10, 2)),
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(&b"r11w"[..], (11, 2)),
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(&b"r12w"[..], (12, 2)),
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(&b"r13w"[..], (13, 2)),
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(&b"r14w"[..], (14, 2)),
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(&b"r15w"[..], (15, 2)),
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(&b"r8b"[..], (8, 1)),
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(&b"r9b"[..], (9, 1)),
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(&b"r10b"[..], (10, 1)),
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(&b"r11b"[..], (11, 1)),
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(&b"r12b"[..], (12, 1)),
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(&b"r13b"[..], (13, 1)),
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(&b"r14b"[..], (14, 1)),
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(&b"r15b"[..], (15, 1)),
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(&b"ax"[..], (0, 2)),
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(&b"cx"[..], (1, 2)),
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(&b"dx"[..], (2, 2)),
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(&b"bx"[..], (3, 2)),
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(&b"sp"[..], (4, 2)),
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(&b"bp"[..], (5, 2)),
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(&b"si"[..], (6, 2)),
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(&b"di"[..], (7, 2)),
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(&b"al"[..], (0, 1)),
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(&b"cl"[..], (1, 1)),
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(&b"dl"[..], (2, 1)),
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(&b"bl"[..], (3, 1)),
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(&b"spl"[..], (4, 1)),
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(&b"bpl"[..], (5, 1)),
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(&b"sil"[..], (6, 1)),
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(&b"dil"[..], (7, 1)),
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];
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for (text, (reg, size)) in cases {
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write_to_buf(text);
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let (n, result) = unsafe { try_parse_reg() };
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assert_eq!(
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result,
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Register::new(reg, size),
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"Failed to parse '{}' n={n}",
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std::str::from_utf8(text).unwrap()
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);
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}
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}
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}
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