usr/src/lib/libc/common/sys/brk.s

   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  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26         .file   "brk.s"
  27
  28 #include "SYS.h"
  29
  30 /*
  31  * _brk_unlocked() simply traps into the kernel to set the brk.  It
  32  * returns 0 if the break was successfully set, or -1 otherwise.
  33  * It doesn't enforce any alignment and it doesn't perform any locking.
  34  * _brk_unlocked() is only called from brk() and _sbrk_unlocked().
  35  */
  36
  37         ENTRY_NP(_brk_unlocked)
  38         SYSTRAP_RVAL1(brk)
  39         SYSCERROR
  40         RET
  41         SET_SIZE(_brk_unlocked)