From ce4618a9c405bd8a9c1e096eb45e9ca83d3891f1 Mon Sep 17 00:00:00 2001 From: Mike Hommey 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