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 #include "lint.h"
28 #include <sys/types.h>
29 #include <unistd.h>
30 #include <sys/syscall.h>
31
32 /*
33 * mman.h contains "#pragma redefine_extname getpagesizes getpagesizes2".
34 * Applications that are still calling getpagesizes() instead of
35 * getpagesizes2() are 'legacy' applications that have not been recompiled
36 * since the #pragma redefine_extname change.
37 *
38 * Depending on the platform, 'legacy' applications may not be given the full
39 * set of supported page sizes to prevent them from inadvertantly using 'new'
40 * large pagesizes that might cause application failure or low system memory
41 * conditions.
42 *
43 * The first parameter to the SYS_getpagesizes syscall is effectively
44 * a 'legacy' boolean flag used as such in the kernel.
45 */
46 int
getpagesizes(size_t pagesize[],int nelem)47 getpagesizes(size_t pagesize[], int nelem)
48 {
49 return (syscall(SYS_getpagesizes, 1, pagesize, nelem));
50 }
51
52 int
getpagesizes2(size_t pagesize[],int nelem)53 getpagesizes2(size_t pagesize[], int nelem)
54 {
55 return (syscall(SYS_getpagesizes, 0, pagesize, nelem));
56 }
57