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Diffstat (limited to 'results/classifier/no-thinking-deepseek-r1:70b/reasoning/manual-review/1915327')
| -rw-r--r-- | results/classifier/no-thinking-deepseek-r1:70b/reasoning/manual-review/1915327 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/results/classifier/no-thinking-deepseek-r1:70b/reasoning/manual-review/1915327 b/results/classifier/no-thinking-deepseek-r1:70b/reasoning/manual-review/1915327 new file mode 100644 index 00000000..6ca89558 --- /dev/null +++ b/results/classifier/no-thinking-deepseek-r1:70b/reasoning/manual-review/1915327 @@ -0,0 +1,7 @@ +The issue revolves around incorrect behavior of the `cmpxchg` instruction in QEMU's TCG (Tiny Code Generator) implementation when compared to real CPU behavior. Specifically, QEMU incorrectly zero-extends the EAX register to RAX after a `cmpxchg` operation, which does not align with how the instruction should behave according to Intel specifications. + +**Category: instruction** + +The problem is clearly tied to an incorrect implementation of a specific x86_64 instruction (`cmpxchg`) within QEMU's TCG. This misbehavior affects both regular and locked versions of the `cmpxchg` instruction, leading to unexpected results in applications that rely on this instruction, such as those developed with BPF (Berkeley Packet Filter). The incorrect zero-extension of EAX to RAX violates the expected semantics defined by Intel's documentation, where the accumulator should remain unchanged if the comparison matches. + +Since this is a problem with how QEMU emulates a specific CPU instruction, it falls under the "instruction" category. This classification helps in directing the bug report to the appropriate part of the codebase and development team within the QEMU project that handles instruction emulation. \ No newline at end of file |