Home | History | Annotate | Download | only in sys
      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
     49 getpagesizes(size_t pagesize[], int nelem)
     50 {
     51 	return (syscall(SYS_getpagesizes, 1, pagesize, nelem));
     52 }
     53 
     54 int
     55 getpagesizes2(size_t pagesize[], int nelem)
     56 {
     57 	return (syscall(SYS_getpagesizes, 0, pagesize, nelem));
     58 }
     59