1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/salib.h>
30
31 /*
32 * For documentation on these functions, see malloc(3C).
33 */
34
35 void *
malloc(size_t size)36 malloc(size_t size)
37 {
38 size_t *iaddr;
39
40 iaddr = (size_t *)bkmem_alloc(size + sizeof (size_t));
41 if (iaddr == NULL) {
42 errno = ENOMEM;
43 return (NULL);
44 }
45
46 iaddr[0] = size;
47 return (&iaddr[1]);
48 }
49
50 void *
calloc(size_t number,size_t size)51 calloc(size_t number, size_t size)
52 {
53 void *addr;
54
55 addr = malloc(number * size);
56 if (addr == NULL)
57 return (NULL);
58
59 return (memset(addr, 0, number * size));
60 }
61
62 void *
realloc(void * oldaddr,size_t size)63 realloc(void *oldaddr, size_t size)
64 {
65 void *addr;
66 size_t oldsize;
67
68 addr = malloc(size);
69 if (oldaddr != NULL) {
70 oldsize = ((size_t *)oldaddr)[-1];
71 if (addr != NULL) {
72 bcopy(oldaddr, addr, (oldsize > size ? oldsize : size));
73 free(oldaddr);
74 }
75 }
76
77 return (addr);
78 }
79
80 void
free(void * addr)81 free(void *addr)
82 {
83 size_t *lenloc;
84
85 if (addr == NULL)
86 return;
87 lenloc = (size_t *)addr - 1;
88 bkmem_free((caddr_t)lenloc, *lenloc + sizeof (size_t));
89 }
90