From: Alan Modra <amodra@gmail.com>
Date: Sun, 30 Aug 2020 22:43:19 +0000 (+0930)
Subject: PR26509 UBSAN: tc-z80.c:3656 shift exponent is too large
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=26e3de8e0a2d95e02b9dec46c67531755303fc4b;p=binutils-gdb.git

PR26509 UBSAN: tc-z80.c:3656 shift exponent is too large

	PR 26509
	* config/tc-z80.c (is_overflow): Use 1UL in mask shift expression.
---

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 757a3118c6e..16e425b371c 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2020-08-31  Alan Modra  <amodra@gmail.com>
+
+	PR 26509
+	* config/tc-z80.c (is_overflow): Use 1UL in mask shift expression.
+
 2020-08-30  Alan Modra  <amodra@gmail.com>
 
 	* config/tc-tic4x.c (tic4x_gen_to_words): Rewrite mantissa
diff --git a/gas/config/tc-z80.c b/gas/config/tc-z80.c
index 237425da354..45fcd6fbf74 100644
--- a/gas/config/tc-z80.c
+++ b/gas/config/tc-z80.c
@@ -3653,7 +3653,7 @@ md_assemble (char *str)
 static int
 is_overflow (long value, unsigned bitsize)
 {
-  long fieldmask = (1 << bitsize) - 1;
+  long fieldmask = (1UL << bitsize) - 1;
   long signmask = ~fieldmask;
   long a = value & fieldmask;
   long ss = a & signmask;