Module Name: src
Committed By: matt
Date: Mon Jan 14 00:07:30 UTC 2013
Added Files:
src/common/lib/libc/arch/arm/string: strcat_arm.S
Log Message:
Add a native version of strcat which uses the optimized strlen and strcpy
routines.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/common/lib/libc/arch/arm/string/strcat_arm.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/common/lib/libc/arch/arm/string/strcat_arm.S
diff -u /dev/null src/common/lib/libc/arch/arm/string/strcat_arm.S:1.1
--- /dev/null Mon Jan 14 00:07:30 2013
+++ src/common/lib/libc/arch/arm/string/strcat_arm.S Mon Jan 14 00:07:29 2013
@@ -0,0 +1,52 @@
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
+
+/*
+ * Implementation of strcat using strlen/strcpy.
+ */
+ENTRY(strcat)
+ str lr, [sp, #-8] /* save return address */
+ push {r4, r5} /* save registers */
+
+ mov r4, r0 /* save dst */
+ mov r5, r1 /* save append */
+
+ bl PLT_SYM(strlen) /* find length of dst */
+
+ add r0, r0, r4 /* add to dst pointer */
+ mov r1, r5 /* fetch append */
+ bl PLT_SYM(strcpy) /* append string */
+
+ mov r0, r4 /* restore dst as return value */
+ pop {r4, r5} /* restore registers */
+ ldr lr, [sp], #8 /* restore return address */
+ RET
+END(strcat)
