1 /* $NetBSD: copy.S,v 1.5 2007/10/17 19:55:37 garbled Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Digital Equipment Corporation and Ralph Campbell.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (C) 1989 Digital Equipment Corporation.
35 * Permission to use, copy, modify, and distribute this software and
36 * its documentation for any purpose and without fee is hereby granted,
37 * provided that the above copyright notice appears in all copies.
38 * Digital Equipment Corporation makes no representations about the
39 * suitability of this software for any purpose. It is provided "as is"
40 * without express or implied warranty.
42 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/loMem.s,
43 * v 1.1 89/07/11 17:55:04 nelson Exp SPRITE (DECWRL)
44 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsm.s,
45 * v 9.2 90/01/29 18:00:39 shirriff Exp SPRITE (DECWRL)
46 * from: Header: /sprite/src/kernel/vm/ds3100.md/vmPmaxAsm.s,
47 * v 1.1 89/07/10 14:27:41 nelson Exp SPRITE (DECWRL)
49 * @(#)locore.s 8.5 (Berkeley) 1/4/94
53 #include <machine/asm.h>
54 #include <machine/asmacros.h>
55 __FBSDID("$FreeBSD$");
57 #include <sys/errno.h>
61 * <v0>int copystr(<a0>const void *src, <a1>void *dst, <a2>size_t len,
75 beqz t0, 3f /* NULL - end of string*/
81 3: /* done != NULL -> how many bytes were copied */
92 * int copyinstr(void *uaddr, void *kaddr, size_t maxlen, size_t *lencopied)
93 * Copy a NIL-terminated string, at most maxlen characters long, from the
94 * user's address space. Return the number of characters copied (including
95 * the NIL) in *lencopied. If the string is too long, return ENAMETOOLONG;
96 * else return 0 or EFAULT.
103 la v0, _C_LABEL(copystrerr)
104 blt a0, zero, _C_LABEL(copystrerr)
105 sw v0, PCB_ONFAULT(v1)
123 j ra # v0 is 0 or ENAMETOOLONG
124 sw zero, PCB_ONFAULT(v1)
130 * int copyoutstr(void *uaddr, void *kaddr, size_t maxlen, size_t *lencopied);
131 * Copy a NIL-terminated string, at most maxlen characters long, into the
132 * user's address space. Return the number of characters copied (including
133 * the NIL) in *lencopied. If the string is too long, return ENAMETOOLONG;
134 * else return 0 or EFAULT.
141 la v0, _C_LABEL(copystrerr)
142 blt a1, zero, _C_LABEL(copystrerr)
143 sw v0, PCB_ONFAULT(v1)
161 j ra # v0 is 0 or ENAMETOOLONG
162 sw zero, PCB_ONFAULT(v1)
168 sw zero, PCB_ONFAULT(v1)
170 li v0, EFAULT # return EFAULT