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authorChristian Krinitsin <mail@krinitsin.com>2025-06-04 21:20:13 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-04 21:20:13 +0000
commit2773b5e236e2217a35a53dbc298757610c7bbbc6 (patch)
tree07b1cfc6ccd3a8f2808ffac94e8a4488079787a6 /results/classifier/008/semantic/gitlab_semantic_adox
parent45cde517004371146f7533c59c8005b8b2629291 (diff)
downloadqemu-analysis-2773b5e236e2217a35a53dbc298757610c7bbbc6.tar.gz
qemu-analysis-2773b5e236e2217a35a53dbc298757610c7bbbc6.zip
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+semantic: 0.990
+graphic: 0.782
+device: 0.776
+debug: 0.706
+vnc: 0.663
+boot: 0.599
+socket: 0.556
+permissions: 0.500
+performance: 0.460
+network: 0.426
+files: 0.374
+PID: 0.343
+other: 0.286
+KVM: 0.240
+
+x86 ADOX and ADCX semantic bug
+Description of problem
+The result of instruction ADOX and ADCX are different from the CPU. The value of one of EFLAGS is different.
+
+Steps to reproduce
+
+Compile this code
+
+
+void main() {
+    asm("push 512; popfq;");
+    asm("mov rax, 0xffffffff84fdbf24");
+    asm("mov rbx, 0xb197d26043bec15d");
+    asm("adox eax, ebx");
+}
+
+
+
+Execute and compare the result with the CPU. This problem happens with ADCX, too (with CF).
+
+CPU
+
+OF = 0
+
+
+QEMU
+
+OF = 1
+
+
+
+
+
+
+Additional information
+This bug is discovered by research conducted by KAIST SoftSec.