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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 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 "lint.h"
30 #include <sys/types.h>
31 #include <unistd.h>
32 #include <sys/syscall.h>
33
34 /*
35 * mman.h contains "#pragma redefine_extname getpagesizes getpagesizes2".
36 * Applications that are still calling getpagesizes() instead of
37 * getpagesizes2() are 'legacy' applications that have not been recompiled
38 * since the #pragma redefine_extname change.
39 *
40 * Depending on the platform, 'legacy' applications may not be given the full
41 * set of supported page sizes to prevent them from inadvertantly using 'new'
42 * large pagesizes that might cause application failure or low system memory
43 * conditions.
44 *
45 * The first parameter to the SYS_getpagesizes syscall is effectively
46 * a 'legacy' boolean flag used as such in the kernel.
47 */
48 int
getpagesizes(size_t pagesize[],int nelem)49 getpagesizes(size_t pagesize[], int nelem)
50 {
51 return (syscall(SYS_getpagesizes, 1, pagesize, nelem));
52 }
53
54 int
getpagesizes2(size_t pagesize[],int nelem)55 getpagesizes2(size_t pagesize[], int nelem)
56 {
57 return (syscall(SYS_getpagesizes, 0, pagesize, nelem));
58 }
59