From 366e4448e231ced837b609f05f73f2aabe5e0750 Mon Sep 17 00:00:00 2001
From: Matthieu Volat <mazhe@alkumuna.eu>
Date: Thu, 12 Jan 2017 14:13:47 +0100
Subject: [PATCH 1/1] Fix an undefined C behavior.

This will fix the minus operation on certain OS/compilers.
---
 src/mc/DwarfExpression.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/mc/DwarfExpression.cpp b/src/mc/DwarfExpression.cpp
index 6cdba68ae1..03298eb6ba 100644
--- a/src/mc/DwarfExpression.cpp
+++ b/src/mc/DwarfExpression.cpp
@@ -225,9 +225,12 @@ void execute(
       stack.top() = - (intptr_t) stack.top();
       break;
 
-    case DW_OP_minus:
-      stack.push(stack.pop() - stack.pop());
+    case DW_OP_minus: {
+      intptr_t first = stack.pop();
+      intptr_t second = stack.pop();
+      stack.push(second - first);
       break;
+    }
 
     case DW_OP_and:
       stack.push(stack.pop() & stack.pop());
-- 
2.20.1