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      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 #pragma weak _getustack = getustack
     30 #pragma weak _setustack = setustack
     31 
     32 #include "lint.h"
     33 #include <ucontext.h>
     34 #include <sys/syscall.h>
     35 
     36 /*
     37  * __getcontext() must be implemented in assembler, as opposed to
     38  * the other members of the SYS_context family (see __getcontext.s)
     39  * because we must be careful to get the precise context of the caller.
     40  */
     41 
     42 int
     43 __setcontext(const ucontext_t *ucp)
     44 {
     45 	return (syscall(SYS_context, 1, ucp));
     46 }
     47 
     48 int
     49 getustack(stack_t **spp)
     50 {
     51 	return (syscall(SYS_context, 2, spp));
     52 }
     53 
     54 int
     55 setustack(stack_t *sp)
     56 {
     57 	return (syscall(SYS_context, 3, sp));
     58 }
     59