From 904141bfb8d5385b75eb3b7afec1dcda89af65a7 Mon Sep 17 00:00:00 2001
From: Christian Krinitsin <mail@krinitsin.com>
Date: Fri, 30 May 2025 15:56:20 +0200
Subject: add tests and include results

---
 classification/test_input/gitlab_semantic_bextr | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 classification/test_input/gitlab_semantic_bextr

(limited to 'classification/test_input/gitlab_semantic_bextr')

diff --git a/classification/test_input/gitlab_semantic_bextr b/classification/test_input/gitlab_semantic_bextr
new file mode 100644
index 00000000..dabe16ac
--- /dev/null
+++ b/classification/test_input/gitlab_semantic_bextr
@@ -0,0 +1,25 @@
+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.
-- 
cgit 1.4.1