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From ce4618a9c405bd8a9c1e096eb45e9ca83d3891f1 Mon Sep 17 00:00:00 2001
From: Mike Hommey <mh@glandium.org>
Date: Fri, 18 Oct 2024 21:42:03 +0900
Subject: [PATCH] [ASan][windows] Recognize movzx r11d, BYTE PTR [rdx] in
interception_win (#111638)
The instruction is present in some library in the 24H2 update for
Windows 11:
==8508==interception_win: unhandled instruction at 0x7ff83e193a40: 44 0f
b6 1a 4c 8b d2 48
This could be generalized, but getting all the ModR/M byte combinations
right is tricky. Many other classes of instructions handled in this file
could use some generalization too.
---
compiler-rt/lib/interception/interception_win.cpp | 1 +
1 file changed, 1 insertion(+)
diff --git a/compiler-rt/lib/interception/interception_win.cpp b/compiler-rt/lib/interception/interception_win.cpp
index 4a6ff6656edb..4f60d4251303 100644
--- a/compiler-rt/lib/interception/interception_win.cpp
+++ b/compiler-rt/lib/interception/interception_win.cpp
@@ -768,6 +768,7 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) {
}
switch (*(u32*)(address)) {
+ case 0x1ab60f44: // 44 0f b6 1a : movzx r11d, BYTE PTR [rdx]
case 0x24448b48: // 48 8b 44 24 XX : mov rax, QWORD ptr [rsp + XX]
case 0x246c8948: // 48 89 6C 24 XX : mov QWORD ptr [rsp + XX], rbp
case 0x245c8948: // 48 89 5c 24 XX : mov QWORD PTR [rsp + XX], rbx
--
2.47.0.1.g59ce1bf855