sigcode32.S revision 95719 
1/* $FreeBSD: head/sys/powerpc/powerpc/sigcode.S 95719 2002-04-29 12:14:31Z benno $ */
2/* $NetBSD: sigcode.S,v 1.1 1999/11/17 14:56:11 kleink Exp $	*/
3
4/*
5 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1996 TooLs GmbH.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by TooLs GmbH.
20 * 4. The name of TooLs GmbH may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36#include <sys/syscall.h>
37
38/*
39 * The following code gets copied to the top of the user stack on process
40 * execution.  It does signal trampolining on signal delivery.
41 *
42 * On entry r1 points to a struct sigframe at bottom of current stack.
43 * All other registers are unchanged.
44 */
45	.globl	_C_LABEL(sigcode),_C_LABEL(szsigcode)
46_C_LABEL(sigcode):
47	addi	1,1,-16			/* reserved space for callee */
48	blrl
49	addi	3,1,16+8		/* compute &sf_sc */
50	li	0,SYS_sigreturn
51	sc				/* sigreturn(scp) */
52	li	0,SYS_exit
53	sc				/* exit(errno) */
54_C_LABEL(szsigcode) = . - _C_LABEL(sigcode)
55