blob: bb3288b030a13a5270d190dba11df307fef1cd4d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
|
<think>
Alright, let's figure out how to classify this bug report. The issue is about QEMU having incorrect translations when using REX ( Richards Extension for x86 ) in combination with the LAHF and SAHF instructions.
First, I recall that QEMU handles different architectures by translating machine code into an Intermediate Representation (IR) which then runs on the target system. So if there's a problem here, it's likely related to how certain instructions are being translated.
LAHF and SAHF are x86 instructions used to load and store the AH part of the flags register. REX prefixes affect operand selection and can alter instruction encoding but don't change the operation semantics. The bug is about incorrect semantic mapping, meaning that QEMU isn't handling these instructions correctly when REX is involved.
Looking at the categories, "mistranslation" refers to errors in how source architecture code is translated into the target. Since this involves specific instructions not being handled properly during translation, it fits under mistranslation. Other options like assembly lowering or user-mode issues don't seem as precise here.
</think>
mistranslation
|