From 0d5d0b40c4ecb3f7f4fcdc83a5a51a2ee65dfc89 Mon Sep 17 00:00:00 2001
From: Michelle McDaniel <adiaaida@gmail.com>
Date: Thu, 11 May 2017 12:28:28 -0700
Subject: [PATCH] Handle ADC in x86 unwindLazyState (#11527)

When we add PGO instrumentation to coreclr, the instrumentation injects
PUSH, MOV, ADD, ADC, POP into the prolog to mark the function entry. This
causes a crash because we do not currently handle ADC instructions in
unwindLazyState. This change adds support for ADC, which uses the normal
DecodeRM code we already have in place.
---
 src/vm/i386/gmsx86.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vm/i386/gmsx86.cpp b/src/vm/i386/gmsx86.cpp
index 2852b92..64ac4a3 100644
--- a/src/vm/i386/gmsx86.cpp
+++ b/src/vm/i386/gmsx86.cpp
@@ -894,6 +894,8 @@ void LazyMachState::unwindLazyState(LazyMachState* baseState,
 
             case 0x01:                           // ADD mod/rm
             case 0x03:
+            case 0x11:                           // ADC mod/rm
+            case 0x13:
             case 0x29:                           // SUB mod/rm
             case 0x2B:
                 datasize = 0;
-- 
2.7.4