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authoriximeow <me@iximeow.net>2022-05-01 13:53:51 -0700
committeriximeow <git@iximeow.net>2022-12-03 15:11:09 -0800
commit635bf0336fe2f654945a23a6b59591866cdb1d2e (patch)
tree682cbf2404cc09b6c8bec367e0b7573d510b676b /src
parentf11d0c17363fbd73e14e3db92cc0bd7d8d80dcf2 (diff)
fix incorrect rex selection and field description offsets
Diffstat (limited to 'src')
-rw-r--r--src/long_mode/mod.rs38
1 files changed, 19 insertions, 19 deletions
diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs
index d087357..6412afb 100644
--- a/src/long_mode/mod.rs
+++ b/src/long_mode/mod.rs
@@ -6423,15 +6423,15 @@ fn read_opc_hotpath<
desc: InnerDescription::RexPrefix(b),
id: words.offset() as u32 * 8 - 8,
});
+ instruction.prefixes.rex_from(b);
b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
record = unsafe {
core::ptr::read_volatile(&OPCODES[b as usize])
};
- instruction.prefixes.rex_from(b);
} else if b == 0x66 {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("operand size override (to 16 bits)"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?;
record = unsafe {
@@ -6572,29 +6572,29 @@ fn read_with_annotations<
}
}
if b == 0x66 {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("operand size override (to 16 bits)"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_operand_size();
} else if b == 0x67 {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("address size override (to 32 bits)"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_address_size();
instruction.regs[1].bank = RegisterBank::D;
instruction.regs[2].bank = RegisterBank::D;
} else if b == 0xf2 {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("repnz prefix"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_repnz();
} else if b == 0xf3 {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("rep prefix"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_rep();
} else {
@@ -6604,29 +6604,29 @@ fn read_with_annotations<
0x36 |
0x3e => {
/* no-op in amd64 */
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("ignored prefix in 64-bit mode"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
},
0x64 => {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::SegmentPrefix(Segment::FS),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_fs();
},
0x65 => {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::SegmentPrefix(Segment::GS),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_gs();
},
0xf0 => {
- sink.record((words.offset() - 2) as u32 * 8, (words.offset() - 2) as u32 * 8 + 7, FieldDescription {
+ sink.record((words.offset() - 1) as u32 * 8, (words.offset() - 1) as u32 * 8 + 7, FieldDescription {
desc: InnerDescription::Misc("lock prefix"),
- id: words.offset() as u32 * 8 - 16,
+ id: words.offset() as u32 * 8 - 8,
});
prefixes.set_lock();
},