From: Dominik Vogt <vogt@linux.vnet.ibm.com>
Date: Mon, 9 Nov 2015 16:12:56 +0000 (+0100)
Subject: binutils: Fix left shift of negative value.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c4e0beacd71d4a65cfbe27466ae3d0403c39ead5;p=binutils-gdb.git

binutils: Fix left shift of negative value.

This patch fixes all occurences of left-shifting negative constants in C code
which is undefined by the C standard.

binutils/ChangeLog:

        * dwarf.c (read_leb128): Fix left shift of negative value.
---

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 8779082c649..bcbad22fdf3 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,7 @@
+2015-11-09  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+	* dwarf.c (read_leb128): Fix left shift of negative value.
+
 2015-11-03  Alan Modra  <amodra@gmail.com>
 
 	* readelf (process_version_sections): Check DT_VERNEED and
diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index c14049ac8d2..9f1baea8312 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -292,7 +292,7 @@ read_leb128 (unsigned char *data,
     *length_return = num_read;
 
   if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
-    result |= (dwarf_vma) -1 << shift;
+    result |= -((dwarf_vma) 1 << shift);
 
   return result;
 }