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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
| commit | dee4dcba78baf712cab403d47d9db319ab7f95d6 (patch) | |
| tree | 418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr | |
| parent | 4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff) | |
| download | emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip | |
restructure results
Diffstat (limited to 'results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr')
| -rw-r--r-- | results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr b/results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr new file mode 100644 index 00000000..04138b62 --- /dev/null +++ b/results/classifier/zero-shot/004/semantic/gitlab_semantic_bextr @@ -0,0 +1,38 @@ +semantic: 0.993 +instruction: 0.944 +assembly: 0.800 +graphic: 0.790 +device: 0.717 +boot: 0.516 +vnc: 0.471 +socket: 0.397 +mistranslation: 0.337 +network: 0.219 +other: 0.099 +KVM: 0.091 + +x86 BEXTR semantic bug +Description of problem +The result of instruction BEXTR is different with from the CPU. The value of destination register is different. I think QEMU does not consider the operand size limit. + +Steps to reproduce + +Compile this code + +void main() { + asm("mov rax, 0x17b3693f77fb6e9"); + asm("mov rbx, 0x8f635a775ad3b9b4"); + asm("mov rcx, 0xb717b75da9983018"); + asm("bextr eax, ebx, ecx"); +} + +Execute and compare the result with the CPU. + +CPU +RAX = 0x5a + +QEMU +RAX = 0x635a775a + +Additional information +This bug is discovered by research conducted by KAIST SoftSec. |