xref: /freebsd/stand/i386/libi386/i386_copy.c (revision 5ca8e32633c4ffbbcd6762e5888b6a4ba0708c6c)
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 /*
28  * MD primitives supporting placement of module data
29  *
30  * XXX should check load address/size against memory top.
31  */
32 #include <stand.h>
33 
34 #include "libi386.h"
35 #include "btxv86.h"
36 
37 ssize_t
38 i386_copyin(const void *src, vm_offset_t dest, const size_t len)
39 {
40 	if (dest + len >= memtop) {
41 		errno = EFBIG;
42 		return (-1);
43 	}
44 
45 	bcopy(src, PTOV(dest), len);
46 	return (len);
47 }
48 
49 ssize_t
50 i386_copyout(const vm_offset_t src, void *dest, const size_t len)
51 {
52 	if (src + len >= memtop) {
53 		errno = EFBIG;
54 		return (-1);
55 	}
56 
57 	bcopy(PTOV(src), dest, len);
58 	return (len);
59 }
60 
61 
62 ssize_t
63 i386_readin(readin_handle_t fd, vm_offset_t dest, const size_t len)
64 {
65 
66 	if (dest + len >= memtop_copyin) {
67 		errno = EFBIG;
68 		return (-1);
69 	}
70 
71 	return (VECTX_READ(fd, PTOV(dest), len));
72 }
73