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/* $FreeBSD$ */
/* $NetBSD: sigcode.S,v 1.1 1999/11/17 14:56:11 kleink Exp $ */
/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#include <sys/syscall.h>
#include "assym.inc"
/*
* The following code gets copied to the top of the user stack on process
* execution. It does signal trampolining on signal delivery.
*
* On entry r1 points to a struct sigframe at bottom of current stack.
* All other registers are unchanged.
*
* Entered midway through for v2 ELF binaries that don't need to deal with
* function descriptors.
*
*/
.globl CNAME(sigcode64),CNAME(szsigcode64)
.globl CNAME(sigcode64_elfv2),CNAME(szsigcode64_elfv2)
CNAME(sigcode64):
mflr 2 /* resolve function descriptor */
ld 0,0(2)
ld 2,8(2)
mtlr 0
CNAME(sigcode64_elfv2):
addi 1,1,-112 /* reserved space for callee */
mflr 12 /* ELFv2 wants the address in r12 */
blrl
addi 3,1,112+SF_UC /* restore sp, and get &frame->sf_uc */
li 0,SYS_sigreturn
sc /* sigreturn(scp) */
li 0,SYS_exit
sc /* exit(errno) */
nop /* align to doubleword */
endsigcode64:
.data
CNAME(szsigcode64):
.long endsigcode64 - CNAME(sigcode64)
CNAME(szsigcode64_elfv2):
.long endsigcode64 - CNAME(sigcode64_elfv2)
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