svn commit: r248395 - in head/sys: conf libkern/arm

[Andrew Turner]

Author: andrew
Date: Sat Mar 16 23:11:55 2013
New Revision: 248395
URL: http://svnweb.freebsd.org/changeset/base/248395

Log:
  Add __aeabi_memset to libkern, implemented using memset, as clang may
  generate calls to it.

Added:
  head/sys/libkern/arm/memset.S   (contents, props changed)
Modified:
  head/sys/conf/files.arm

Modified: head/sys/conf/files.arm
==============================================================================
--- head/sys/conf/files.arm	Sat Mar 16 23:10:40 2013	(r248394)
+++ head/sys/conf/files.arm	Sat Mar 16 23:11:55 2013	(r248395)
@@ -78,6 +78,7 @@ libkern/arm/ffs.S		standard
 libkern/arm/ldivmod.S		standard
 libkern/arm/ldivmod_helper.c	standard
 libkern/arm/memcpy.S		standard
+libkern/arm/memset.S		standard
 libkern/arm/muldi3.c		standard
 libkern/ashldi3.c		standard
 libkern/ashrdi3.c		standard

Added: head/sys/libkern/arm/memset.S
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/libkern/arm/memset.S	Sat Mar 16 23:11:55 2013	(r248395)
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2013 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#ifdef __ARM_EABI__
+
+/*
+ * This implements
+ *  void __aeabi_memset(void *dest, size_t len, int c)
+ * by calling:
+ *  void *memset(dest, c, len)
+ *
+ * The arguments are in r0-r2, r3 can be used as a scratch register.
+ */
+ENTRY_NP(__aeabi_memset)
+	mov	r3, r2
+	mov	r2, r1
+	mov	r1, r3
+	b	memset
+END(__aeabi_memset)
+
+#endif
+