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-rw-r--r--src/long_mode/display.rs250
1 files changed, 213 insertions, 37 deletions
diff --git a/src/long_mode/display.rs b/src/long_mode/display.rs
index 71bb1dd..3cfab94 100644
--- a/src/long_mode/display.rs
+++ b/src/long_mode/display.rs
@@ -3595,6 +3595,20 @@ impl <'instr, T: fmt::Write, Y: YaxColors> Colorize<T, Y> for InstructionDisplay
/// No per-operand context when contextualizing an instruction!
struct NoContext;
+// TODO: find a better place to put this....
+fn c_to_hex(c: u8) -> u8 {
+ /*
+ static CHARSET: &'static [u8; 16] = b"0123456789abcdef";
+ CHARSET[c as usize]
+ */
+ // the conditional branch below is faster than a lookup, yes
+ if c < 10 {
+ b'0' + c
+ } else {
+ b'a' + c - 10
+ }
+}
+
impl Instruction {
pub fn write_to<T: fmt::Write>(&self, out: &mut T) -> fmt::Result {
self.display_with(DisplayStyle::Intel).contextualize(&NoColors, 0, Some(&NoContext), out)
@@ -3615,9 +3629,9 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
if instr.prefixes.rep_any() {
if instr.opcode.can_rep() {
if instr.prefixes.rep() {
- write!(out, "rep ")?;
+ out.write_str("rep ")?;
} else if instr.prefixes.repnz() {
- write!(out, "repnz ")?;
+ out.write_str("repnz ")?;
}
}
}
@@ -3635,41 +3649,12 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
if instr.operand_count > 0 {
out.write_str(" ")?;
- const RELATIVE_BRANCHES: [Opcode; 21] = [
- Opcode::JMP, Opcode::JRCXZ,
- Opcode::LOOP, Opcode::LOOPZ, Opcode::LOOPNZ,
- Opcode::JO, Opcode::JNO,
- Opcode::JB, Opcode::JNB,
- Opcode::JZ, Opcode::JNZ,
- Opcode::JNA, Opcode::JA,
- Opcode::JS, Opcode::JNS,
- Opcode::JP, Opcode::JNP,
- Opcode::JL, Opcode::JGE,
- Opcode::JLE, Opcode::JG,
- ];
-
- if instr.operands[0] == OperandSpec::ImmI8 || instr.operands[0] == OperandSpec::ImmI32 {
- if RELATIVE_BRANCHES.contains(&instr.opcode) {
- let x = Operand::from_spec(instr, instr.operands[0]);
-
- return match x {
- Operand::ImmediateI8(rel) => {
- if rel >= 0 {
- write!(out, "$+{}", colors.number(signed_i32_hex(rel as i32)))
- } else {
- write!(out, "${}", colors.number(signed_i32_hex(rel as i32)))
- }
- }
- Operand::ImmediateI32(rel) => {
- if rel >= 0 {
- write!(out, "$+{}", colors.number(signed_i32_hex(rel)))
- } else {
- write!(out, "${}", colors.number(signed_i32_hex(rel)))
- }
- }
- _ => { unreachable!() }
- };
- }
+ if instr.visit_operand(0, &mut RelativeBranchPrinter {
+ inst: instr,
+ colors,
+ out,
+ })? {
+ return Ok(());
}
let mut displayer = ColorizingOperandVisitor {
@@ -4167,3 +4152,194 @@ impl <T: fmt::Write, Y: YaxColors> ShowContextual<u64, [Option<alloc::string::St
Ok(())
}
}
+
+static RELATIVE_BRANCHES: [Opcode; 21] = [
+ Opcode::JMP, Opcode::JRCXZ,
+ Opcode::LOOP, Opcode::LOOPZ, Opcode::LOOPNZ,
+ Opcode::JO, Opcode::JNO,
+ Opcode::JB, Opcode::JNB,
+ Opcode::JZ, Opcode::JNZ,
+ Opcode::JNA, Opcode::JA,
+ Opcode::JS, Opcode::JNS,
+ Opcode::JP, Opcode::JNP,
+ Opcode::JL, Opcode::JGE,
+ Opcode::JLE, Opcode::JG,
+];
+
+struct RelativeBranchPrinter<'a, Y: YaxColors, F: fmt::Write> {
+ inst: &'a Instruction,
+ colors: &'a Y,
+ out: &'a mut F,
+}
+
+impl<'a, Y: YaxColors, F: fmt::Write> crate::long_mode::OperandVisitor for RelativeBranchPrinter<'a, Y, F> {
+ // return true if we printed a relative branch offset, false otherwise
+ type Ok = bool;
+ // but errors are errors
+ type Error = fmt::Error;
+
+ fn visit_reg(&mut self, _reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_deref(&mut self, _reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_disp(&mut self, _reg: RegSpec, _disp: i32) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ #[cfg_attr(feature="profiling", inline(never))]
+ fn visit_i8(&mut self, rel: i8) -> Result<Self::Ok, Self::Error> {
+ if RELATIVE_BRANCHES.contains(&self.inst.opcode) {
+ self.out.write_char('$')?;
+ // danger_anguished_string_write(self.out, "$");
+ let mut v = rel as u8;
+ if rel < 0 {
+ self.out.write_char('-')?;
+ //danger_anguished_string_write(&mut self.out, "-");
+ v = -rel as u8;
+ } else {
+ self.out.write_char('+')?;
+ // danger_anguished_string_write(&mut self.out, "+");
+ }
+ self.out.write_str("0x")?;
+ // danger_anguished_string_write(self.out, "0x");
+ let mut buf = [core::mem::MaybeUninit::<u8>::uninit(); 2];
+ let mut curr = buf.len();
+ loop {
+ let digit = v % 16;
+ let c = c_to_hex(digit as u8);
+ curr -= 1;
+ buf[curr].write(c);
+ v = v / 16;
+ if v == 0 {
+ break;
+ }
+ }
+ let buf = &buf[curr..];
+ let s = unsafe {
+ core::mem::transmute::<&[core::mem::MaybeUninit<u8>], &str>(buf)
+ };
+
+ self.out.write_str(s)?;
+// anguished_string_write(&mut self.out, s);
+ Ok(true)
+ } else {
+ Ok(false)
+ }
+ }
+ #[cfg_attr(feature="profiling", inline(never))]
+ fn visit_i32(&mut self, rel: i32) -> Result<Self::Ok, Self::Error> {
+ if RELATIVE_BRANCHES.contains(&self.inst.opcode) || self.inst.opcode == Opcode::XBEGIN {
+ self.out.write_char('$')?;
+ // danger_anguished_string_write(self.out, "$");
+ let mut v = rel as u32;
+ if rel < 0 {
+ self.out.write_char('-')?;
+ // danger_anguished_string_write(&mut self.out, "-");
+ v = -rel as u32;
+ } else {
+ self.out.write_char('+')?;
+ // danger_anguished_string_write(&mut self.out, "+");
+ }
+ self.out.write_str("0x")?;
+ // danger_anguished_string_write(self.out, "0x");
+ let mut buf = [core::mem::MaybeUninit::<u8>::uninit(); 8];
+ let mut curr = buf.len();
+ loop {
+ let digit = v % 16;
+ let c = c_to_hex(digit as u8);
+ curr -= 1;
+ buf[curr].write(c);
+ v = v / 16;
+ if v == 0 {
+ break;
+ }
+ }
+ let buf = &buf[curr..];
+ let s = unsafe {
+ core::mem::transmute::<&[core::mem::MaybeUninit<u8>], &str>(buf)
+ };
+
+// danger_anguished_string_write(&mut self.out, s);
+
+ // danger_anguished_variable_length_bstring_write(unsafe { self.out.as_mut_vec() }, s.as_bytes());
+ self.out.write_str(s)?;
+ Ok(true)
+ } else {
+ Ok(false)
+ }
+ }
+ fn visit_u8(&mut self, _imm: u8) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_i16(&mut self, _imm: i16) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_u16(&mut self, _imm: u16) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_u32(&mut self, _imm: u32) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_i64(&mut self, _imm: i64) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_u64(&mut self, _imm: u64) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_abs_u32(&mut self, _imm: u32) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_abs_u64(&mut self, _imm: u64) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_scale(&mut self, _reg: RegSpec, _scale: u8) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_scale(&mut self, _base: RegSpec, _index: RegSpec, _scale: u8) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_scale_disp(&mut self, _reg: RegSpec, _scale: u8, _disp: i32) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_scale_disp(&mut self, _base: RegSpec, _index: RegSpec, _scale: u8, _disp: i32) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_other(&mut self) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_mask_merge(&mut self, _spec: RegSpec, _mask: RegSpec, _merge_mode: MergeMode) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_mask_merge_sae(&mut self, _spec: RegSpec, _mask: RegSpec, _merge_mode: MergeMode, _sae_mode: crate::long_mode::SaeMode) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_mask_merge_sae_noround(&mut self, _spec: RegSpec, _mask: RegSpec, _merge_mode: MergeMode) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_disp_masked(&mut self, _spec: RegSpec, _disp: i32, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_deref_masked(&mut self, _spec: RegSpec, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_scale_masked(&mut self, _spec: RegSpec, _scale: u8, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_reg_scale_disp_masked(&mut self, _spec: RegSpec, _scale: u8, _disp: i32, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_masked(&mut self, _base: RegSpec, _index: RegSpec, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_disp_masked(&mut self, _base: RegSpec, _index: RegSpec, _disp: i32, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_scale_masked(&mut self, _base: RegSpec, _index: RegSpec, _scale: u8, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+ fn visit_index_base_scale_disp_masked(&mut self, _base: RegSpec, _index: RegSpec, _scale: u8, _disp: i32, _mask_reg: RegSpec) -> Result<Self::Ok, Self::Error> {
+ Ok(false)
+ }
+}
+
generated by cgit v1.1 at 2024-11-26 20:54:11 +0000