From edf8c17adba6f9b8120adaa943693f27ef82bdbf Mon Sep 17 00:00:00 2001
From: Pat Gavlin <pagavlin@microsoft.com>
Date: Thu, 27 Jul 2017 12:32:07 -0700
Subject: [PATCH] Fix `getTargetOfCall` for ARM.

If the instruction we're decoding is not a call, don't attempt to decode
it as if it were an x86 instruction. Instead, just return 0 as on ARM64.
---
 src/vm/gccover.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/vm/gccover.cpp b/src/vm/gccover.cpp
index 15ce761..895c176 100644
--- a/src/vm/gccover.cpp
+++ b/src/vm/gccover.cpp
@@ -1035,6 +1035,10 @@ static SLOT getTargetOfCall(SLOT instrPtr, PCONTEXT regs, SLOT*nextInstr) {
         unsigned int regnum = (instrPtr[0] & 0x78) >> 3;
         return (BYTE *)getRegVal(regnum, regs);
     }
+    else
+    {
+        return 0; // Not a call.
+    }
 #elif defined(_TARGET_ARM64_)
    if (((*reinterpret_cast<DWORD*>(instrPtr)) & 0xFC000000) == 0x94000000)
    {
-- 
2.7.4