i386_copy.c revision 153589 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/boot/i386/libi386/i386_copy.c 153589 2005-12-21 02:17:58Z sobomax $");
29
30/*
31 * MD primitives supporting placement of module data
32 *
33 * XXX should check load address/size against memory top.
34 */
35#include <stand.h>
36
37#include "libi386.h"
38#include "btxv86.h"
39
40ssize_t
41i386_copyin(const void *src, vm_offset_t dest, const size_t len)
42{
43    if (dest + len >= memtop) {
44	errno = EFBIG;
45	return(-1);
46    }
47
48    bcopy(src, PTOV(dest), len);
49    return(len);
50}
51
52ssize_t
53i386_copyout(const vm_offset_t src, void *dest, const size_t len)
54{
55    if (src + len >= memtop) {
56	errno = EFBIG;
57	return(-1);
58    }
59
60    bcopy(PTOV(src), dest, len);
61    return(len);
62}
63
64
65ssize_t
66i386_readin(const int fd, vm_offset_t dest, const size_t len)
67{
68
69    if (dest + len >= memtop_copyin) {
70	errno = EFBIG;
71	return(-1);
72    }
73
74    return (read(fd, PTOV(dest), len));
75}
76