From bce7af4e11f05f1b4c96bee47e07e95946d4867b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Moln=C3=A1r?=
 <ezerotven+github@gmail.com>
Date: Wed, 28 Aug 2013 22:31:40 +0200
Subject: [PATCH] fixed 8 bit range checking in ElfLinkerAMD64::relocate1

---
 src/linker.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/linker.cpp b/src/linker.cpp
index 34463a92..d5296a96 100644
--- a/src/linker.cpp
+++ b/src/linker.cpp
@@ -625,10 +625,12 @@ void ElfLinkerAMD64::relocate1(const Relocation *rel, upx_byte *location,
         return super::relocate1(rel, location, value, type);
     type += 9;
 
+    bool range_check = false;
     if (strncmp(type, "PC", 2) == 0)
     {
         value -= rel->section->offset + rel->offset;
         type += 2;
+        range_check = true;
     }
 
     if (strcmp(type, "8") == 0)
@@ -638,7 +640,7 @@ void ElfLinkerAMD64::relocate1(const Relocation *rel, upx_byte *location,
 #else
         int displ = (signed char) *location + (int) value;
 #endif
-        if (displ < -128 || displ > 127)
+        if (range_check && (displ < -128 || displ > 127))
             internal_error("target out of range (%d) in reloc %s:%x\n",
                            displ, rel->section->name, rel->offset);
         *location += value;