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[src/trunk]: src/common/lib/libc/arch/arm/string Add simple/small versions of...
details: https://anonhg.NetBSD.org/src/rev/dac78627c555
branches: trunk
changeset: 783778:dac78627c555
user: matt <matt%NetBSD.org@localhost>
date: Tue Jan 08 13:14:54 2013 +0000
description:
Add simple/small versions of the str* functions. Suitable for libsa, etc.
diffstat:
common/lib/libc/arch/arm/string/strcpy_naive.S | 86 ++++++++++++++++++++++++++
common/lib/libc/arch/arm/string/strlen_naive.S | 41 ++++++++++++
2 files changed, 127 insertions(+), 0 deletions(-)
diffs (135 lines):
diff -r 5e60f1320734 -r dac78627c555 common/lib/libc/arch/arm/string/strcpy_naive.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/common/lib/libc/arch/arm/string/strcpy_naive.S Tue Jan 08 13:14:54 2013 +0000
@@ -0,0 +1,86 @@
+/*-
+ * 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>
+
+RCSID("$NetBSD: strcpy_naive.S,v 1.1 2013/01/08 13:14:54 matt Exp $")
+
+/*
+ * These are "naive" versions of the str*cpy routines designed to be simple
+ * and small.
+ */
+
+#if defined(STRLCPY)
+/* LINTSTUB: size_t strlcpy(char *, const char *, size_t) */
+ENTRY(strlcpy)
+ add ip, r1, #1 /* save src pointer (+ NUL) */
+ subs r2, r2, #1 /* make sure there's room for a NUL */
+ blt 3f /* no room, do the strlen */
+ add r2, r2, r0 /* get end of dst */
+1: cmp r0, r2 /* room for another char? */
+ beq 2f /* no, write NUL and do the strlen */
+ ldrb r3, [r1], #1 /* read a byte */
+ strb r3, [r0], #1 /* write a byte */
+ teq r3, #0 /* was it a NUL? */
+ bne 1b /* no, do next byte */
+ b 4f /* yes, end of string, so return */
+2: mov r3, #0 /* NUL */
+ strb r3, [r0], #1 /* write to end of string */
+3: ldrb r3, [r1], #1 /* read a byte */
+ teq r3, #0 /* was it a NUL? */
+ bne 3b /* no, get next byte */
+4: sub r0, r1, ip /* return length of src string */
+ RET
+END(strlcpy)
+#elif defined(STRNCPY)
+/* LINTSTUB: char * strncpy(char *, const char *, size_t) */
+ENTRY(strncpy)
+ mov ip, r0 /* we want to preserve r0 */
+ add r2, r2, r0 /* get end of dst buffer */
+1: cmp ip, r2 /* are at the end of dst already? */
+ RETc(eq) /* yes, just return. */
+ ldrb r3, [r1], #1 /* read a byte */
+ strb r3, [ip], #1 /* write a byte */
+ teq r3, #0 /* was it a NUL? */
+ bne 1b /* no, try next byte */
+2: cmp ip, r2 /* are at the end of dst already? */
+ strltb r3, [ip], #1 /* no, write a NUL */
+ blt 2b /* until dst is filled */
+3: RET /* return dst pointer */
+END(strncpy)
+#else
+/* LINTSTUB: char * strcpy(char *, const char *) */
+ENTRY(strcpy)
+ mov ip, r0 /* we want to preserve r0 */
+1: ldrb r3, [r1], #1 /* read a byte */
+ strb r3, [ip], #1 /* write a byte */
+ teq r3, #0 /* was it a NUL? */
+ bne 1b /* no, try next byte */
+ RET /* return dst pointer */
+END(strcpy)
+#endif
diff -r 5e60f1320734 -r dac78627c555 common/lib/libc/arch/arm/string/strlen_naive.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/common/lib/libc/arch/arm/string/strlen_naive.S Tue Jan 08 13:14:54 2013 +0000
@@ -0,0 +1,41 @@
+/*-
+ * 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>
+
+RCSID("$NetBSD: strlen_naive.S,v 1.1 2013/01/08 13:14:54 matt Exp $)
+
+/* LINTSTUB: size_t strlen(const char *) */
+ENTRY(strlen)
+ add ip, r0, #1 /* start of src + NUL */
+1: ldrb r3, [r0], #1 /* read a byte */
+ teq r3, #0 /* is it a NUL? */
+ bne 1b /* no, get next byte */
+ sub r0, r0, ip /* return difference between start and end */
+ RET
+END(strlen)
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