usr/src/lib/libc/i386/sys/__getcontext.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 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27         .file   "__getcontext.s"
  28
  29 /*
  30  * __getcontext() must be implemented in assembler, as opposed
  31  * to the other members of the SYS_context family (see ucontext.c)
  32  * because we must be careful to get the precise context of the caller.
  33  */
  34
  35 #include "SYS.h"
  36
  37         ENTRY(__getcontext)
  38         popl    %edx
  39         pushl   $0
  40         pushl   %edx
  41         SYSTRAP_RVAL1(context)
  42         popl    %edx
  43         movl    %edx, 0(%esp)
  44         SYSCERROR
  45         RET
  46         SET_SIZE(__getcontext)