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-rw-r--r--src/lib.rs5
-rw-r--r--src/long_mode/display.rs8
-rw-r--r--src/long_mode/mod.rs17
-rw-r--r--src/protected_mode/display.rs4
-rw-r--r--src/real_mode/display.rs4
-rw-r--r--test/long_mode/mod.rs2
6 files changed, 16 insertions, 24 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 188a37a..a7b8531 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -140,7 +140,8 @@ pub use real_mode::Arch as x86_16;
mod safer_unchecked;
-const MEM_SIZE_STRINGS: [&'static str; 64] = [
+const MEM_SIZE_STRINGS: [&'static str; 65] = [
+ "BUG",
"byte", "word", "BUG", "dword", "ptr", "far", "BUG", "qword",
"BUG", "mword", "BUG", "BUG", "BUG", "BUG", "BUG", "xmmword",
"BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG", "BUG",
@@ -194,7 +195,7 @@ impl MemoryAccessSize {
/// "variable" accesses access a number of bytes dependent on the physical processor and its
/// operating mode. this is particularly relevant for `xsave`/`xrstor`-style instructions.
pub fn size_name(&self) -> &'static str {
- MEM_SIZE_STRINGS[self.size as usize - 1]
+ MEM_SIZE_STRINGS[self.size as usize]
}
}
diff --git a/src/long_mode/display.rs b/src/long_mode/display.rs
index 9c6795e..c1c6c65 100644
--- a/src/long_mode/display.rs
+++ b/src/long_mode/display.rs
@@ -132,6 +132,10 @@ pub(crate) fn regspec_label(spec: &RegSpec) -> &'static str {
unsafe { REG_NAMES.get_kinda_unchecked((spec.num as u16 + ((spec.bank as u16) << 3)) as usize) }
}
+pub(crate) fn mem_size_label(size: u8) -> &'static str {
+ unsafe { MEM_SIZE_STRINGS.get_kinda_unchecked(size as usize) }
+}
+
impl fmt::Display for RegSpec {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(regspec_label(self))
@@ -3415,7 +3419,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
}
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
@@ -3435,7 +3439,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
out.write_str(", ")?;
let x = Operand::from_spec(instr, instr.operands[i as usize]);
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
if let Some(prefix) = instr.segment_override_for_op(i) {
diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs
index 9bc9f0b..f58976a 100644
--- a/src/long_mode/mod.rs
+++ b/src/long_mode/mod.rs
@@ -4380,21 +4380,6 @@ impl Instruction {
/// prefixes.
pub fn segment_override_for_op(&self, op: u8) -> Option<Segment> {
match self.opcode {
- Opcode::STOS |
- Opcode::SCAS => {
- if op == 0 {
- Some(Segment::ES)
- } else {
- None
- }
- }
- Opcode::LODS => {
- if op == 1 {
- Some(self.prefixes.segment)
- } else {
- None
- }
- }
Opcode::MOVS => {
if op == 0 {
Some(Segment::ES)
@@ -9002,6 +8987,7 @@ fn read_operands<
}
OperandCase::Yb_AL => {
instruction.regs[0] = RegSpec::al();
+ instruction.prefixes.segment = Segment::ES;
if instruction.prefixes.address_size() {
instruction.regs[1] = RegSpec::edi();
} else {
@@ -9028,6 +9014,7 @@ fn read_operands<
let bank = bank_from_prefixes_64(SizeCode::vqp, instruction.prefixes);
instruction.regs[0].num = 0;
instruction.regs[0].bank = bank;
+ instruction.prefixes.segment = Segment::ES;
if instruction.prefixes.address_size() {
instruction.regs[1] = RegSpec::edi();
} else {
diff --git a/src/protected_mode/display.rs b/src/protected_mode/display.rs
index 55cab9e..89b7565 100644
--- a/src/protected_mode/display.rs
+++ b/src/protected_mode/display.rs
@@ -3436,7 +3436,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
}
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
@@ -3456,7 +3456,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
out.write_str(", ")?;
let x = Operand::from_spec(instr, instr.operands[i as usize]);
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
if let Some(prefix) = instr.segment_override_for_op(i) {
diff --git a/src/real_mode/display.rs b/src/real_mode/display.rs
index 9450a39..6472c6c 100644
--- a/src/real_mode/display.rs
+++ b/src/real_mode/display.rs
@@ -3436,7 +3436,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
}
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
@@ -3456,7 +3456,7 @@ fn contextualize_intel<T: fmt::Write, Y: YaxColors>(instr: &Instruction, colors:
out.write_str(", ")?;
let x = Operand::from_spec(instr, instr.operands[i as usize]);
if x.is_memory() {
- out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?;
+ out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?;
out.write_str(" ")?;
}
if let Some(prefix) = instr.segment_override_for_op(i) {
diff --git a/test/long_mode/mod.rs b/test/long_mode/mod.rs
index 8cb032c..b725287 100644
--- a/test/long_mode/mod.rs
+++ b/test/long_mode/mod.rs
@@ -2751,7 +2751,7 @@ fn only_64bit() {
test_display(&[0xae], "scas byte es:[rdi], al");
test_display(&[0xaf], "scas dword es:[rdi], eax");
test_display(&[0x67, 0xaf], "scas dword es:[edi], eax");
- test_display(&[0x67, 0xac], "lods al, byte ds:[esi]");
+ test_display(&[0x67, 0xac], "lods al, byte [esi]");
test_display(&[0x67, 0xaa], "stos byte es:[edi], al");
// note that rax.b does *not* change the register
test_display(&[0x4f, 0xa0, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34], "mov al, byte [0x3412341234123412]");
generated by cgit v1.1 at 2025-10-31 03:15:57 +0000