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 #pragma ident "%Z%%M% %I% %E% SMI"
23 /*
24 * Copyright (c) 1987 Sun Microsystems, Inc.
25 */
26
27 #include <fcntl.h>
28 #include <sys/mman.h>
29
30 /* allocate the buffer to be used by profil(2) */
31 char *
_alloc_profil_buf(size)32 _alloc_profil_buf(size)
33 int size;
34 {
35 char *buf;
36 int fd;
37
38 if((fd = open("/dev/zero",O_RDONLY)) == -1 ) {
39 return (char*) -1;
40 }
41 buf = (char*) mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
42 close(fd);
43 return buf;
44 }
45