From: Alan Modra <amodra@gmail.com>
Date: Sat, 13 Aug 2022 04:37:31 +0000 (+0930)
Subject: ubsan: undefined shift in sign_extend
X-Git-Tag: gdb-13-branchpoint~1426
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9effb9f15f4811a80169801b5d2938961424a7d4;p=thirdparty%2Fbinutils-gdb.git

ubsan: undefined shift in sign_extend

	* libhppa.h (sign_extend): Avoid undefined behaviour.
---

diff --git a/bfd/libhppa.h b/bfd/libhppa.h
index 1de2d5c943b..ebaffe66abf 100644
--- a/bfd/libhppa.h
+++ b/bfd/libhppa.h
@@ -162,7 +162,7 @@ enum hppa_reloc_expr_type_alt
 static inline unsigned ATTRIBUTE_UNUSED
 sign_extend (unsigned x, unsigned len)
 {
-  unsigned signbit = (1 << (len - 1));
+  unsigned signbit = (1u << (len - 1));
   unsigned mask = (signbit << 1) - 1;
   return ((x & mask) ^ signbit) - signbit;
 }