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authorChristian Krinitsin <mail@krinitsin.com>2025-07-07 17:23:11 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-07 17:23:11 +0000
commitc50b0c4da17b6e83640e4ed2380fffb5f507c846 (patch)
treeb4f203fce1380e2ea3578a784bb8ee060fe42cbd /results/classifier/zero-shot-user-mode/output/instruction/1374
parent61361f925d4914a6608a0076e64cc2399311ed5f (diff)
downloademulator-bug-study-c50b0c4da17b6e83640e4ed2380fffb5f507c846.tar.gz
emulator-bug-study-c50b0c4da17b6e83640e4ed2380fffb5f507c846.zip
add zero-shot results
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+instruction: 0.859
+runtime: 0.080
+syscall: 0.061
+
+
+
+x86 BZHI semantic bug
+Description of problem:
+The result of instruction BZHI is different from the CPU. The value of destination register and SF of EFLAGS are different.
+Steps to reproduce:
+1. Compile this code
+```
+void main() {
+    asm("mov rax, 0xb1aa9da2fe33fe3");
+    asm("mov rbx, 0x80000000ffffffff");
+    asm("mov rcx, 0xf3fce8829b99a5c6");
+    asm("bzhi rax, rbx, rcx");
+}
+```
+2. Execute and compare the result with the CPU.
+    - CPU
+        - RAX = 0x0x80000000ffffffff
+        - SF = 1
+    - QEMU
+        - RAX = 0xffffffff
+        - SF = 0
+Additional information:
+This bug is discovered by research conducted by KAIST SoftSec.