glibc-2.3.5-sh-memset.patch

linux下编译交叉工具链的工具源码

From:
	http://sources.redhat.com/ml/libc-alpha/2005-07/msg00051.html
	http://sources.redhat.com/ml/crossgcc/2005-10/msg00035.html

Message-ID: <[e-mail]>
Date: Thu, 06 Oct 2005 21:11:29 +0200
From: Alexander Sieb <sieb at sscd dot de>
To: crossgcc at sourceware dot org
Subject: Crosstool sh4-linux-gcc-4.0.2-glibc-2.3.5 patches

On sh[34]-linux, memset function does not work if 2nd argument is negative
and 3rd argument is greater than 12.
for example, memset(ptr, "\xda", 20) sets 0xff instead of 0xda.
 
Attached patch fixes this problem.
 
	* sysdeps/sh/memset.S (memset): Correct 2nd argument handling.
 
--- glibc-2.3.5.old/sysdeps/sh/memset.S	29 Apr 2003 22:47:18 -0000	1.4
+++ glibc-2.3.5/sysdeps/sh/memset.S	23 Jul 2005 08:37:21 -0000
@@ -28,6 +28,7 @@ ENTRY(memset)
 	bt.s	L_byte_loop_init
 	mov	r4,r7
 
+	extu.b	r5,r5
 	swap.b	r5,r1
 	or	r1,r5
	swap.w	r5,r1

Signed-off-by: Robert P. J. Day <[e-mail]>