1 /*-
2 * Copyright (c) 2011 Google, Inc.
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <stand.h>
28
29 #include "libuserboot.h"
30
31 ssize_t
userboot_copyin(const void * src,vm_offset_t va,size_t len)32 userboot_copyin(const void *src, vm_offset_t va, size_t len)
33 {
34
35 CALLBACK(copyin, src, va, len);
36 return (len);
37 }
38
39 ssize_t
userboot_copyout(vm_offset_t va,void * dst,size_t len)40 userboot_copyout(vm_offset_t va, void *dst, size_t len)
41 {
42
43 CALLBACK(copyout, va, dst, len);
44 return (len);
45 }
46
47 ssize_t
userboot_readin(readin_handle_t fd,vm_offset_t va,size_t len)48 userboot_readin(readin_handle_t fd, vm_offset_t va, size_t len)
49 {
50 ssize_t res, s;
51 size_t sz;
52 char buf[4096];
53
54 res = 0;
55 while (len > 0) {
56 sz = len;
57 if (sz > sizeof(buf))
58 sz = sizeof(buf);
59 s = VECTX_READ(fd, buf, sz);
60 if (s == 0)
61 break;
62 if (s < 0)
63 return (s);
64 CALLBACK(copyin, buf, va, s);
65 len -= s;
66 res += s;
67 va += s;
68 }
69 return (res);
70 }
71