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authorH.J. Lu <hjl.tools@gmail.com>2015-08-27 09:04:40 -0700
committerH.J. Lu <hjl.tools@gmail.com>2015-08-27 09:04:54 -0700
commitd226114b9bfce2ea729f9c7b736aa5d509b2a73c (patch)
tree4076d4d6c1c6c3e112d417f85b036d10ceb79480 /sysdeps/i386/memcpy_chk.S
parent37430363b865f2423bd58b4f0eaa779845ed7e71 (diff)
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Add i386 memset and memcpy assembly functions
Add i386 memset and memcpy assembly functions with REP MOVSB/STOSB
instructions.

	* sysdeps/i386/bcopy.S: New file.
	* sysdeps/i386/bzero.S: Likewise.
	* sysdeps/i386/memcpy.S: Likewise.
	* sysdeps/i386/memmove.S: Likewise.
	* sysdeps/i386/mempcpy.S: Likewise.
	* sysdeps/i386/memset.S: Likewise.
	* sysdeps/i386/bzero.c: Removed.
	* sysdeps/i386/memset.c: Likewise.
	* sysdeps/i386/i586/memcpy_chk.S: Likewise.
	* sysdeps/i386/i586/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i586/memset_chk.S: Likewise.
	* sysdeps/i386/i686/memcpy_chk.S: Moved to ...
	* sysdeps/i386/memcpy_chk.S: Here.
	* sysdeps/i386/i686/memmove_chk.S: Moved to ...
	* sysdeps/i386/memmove_chk.S: Here.
	* sysdeps/i386/i686/mempcpy_chk.S: Moved to ...
	* sysdeps/i386/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/memset_chk.S: Moved to ...
	* sysdeps/i386/memset_chk.S: Likewise.
Diffstat (limited to 'sysdeps/i386/memcpy_chk.S')
-rw-r--r--sysdeps/i386/memcpy_chk.S34
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/i386/memcpy_chk.S b/sysdeps/i386/memcpy_chk.S
new file mode 100644
index 0000000000..b3b25de33c
--- /dev/null
+++ b/sysdeps/i386/memcpy_chk.S
@@ -0,0 +1,34 @@
+/* Checking memcpy for i386.
+   Copyright (C) 2004-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef SHARED
+# include <sysdep.h>
+# include "asm-syntax.h"
+
+	/* For libc.so this is defined in memcpy.S.
+	   For libc.a, this is a separate source to avoid
+	   memcpy bringing in __chk_fail and all routines
+	   it calls.  */
+        .text
+ENTRY (__memcpy_chk)
+	movl	12(%esp), %eax
+	cmpl	%eax, 16(%esp)
+	jb	__chk_fail
+	jmp	memcpy
+END (__memcpy_chk)
+#endif