1/* $FreeBSD$ */ 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#include "assym.inc" 38 39/* 40 * The following code gets copied to the top of the user stack on process 41 * execution. It does signal trampolining on signal delivery. 42 * 43 * On entry r1 points to a struct sigframe at bottom of current stack. 44 * All other registers are unchanged. 45 * 46 * Entered midway through for v2 ELF binaries that don't need to deal with 47 * function descriptors. 48 * 49 */ 50 .globl CNAME(sigcode64),CNAME(szsigcode64) 51 .globl CNAME(sigcode64_elfv2),CNAME(szsigcode64_elfv2) 52CNAME(sigcode64): 53 mflr 2 /* resolve function descriptor */ 54 ld 0,0(2) 55 ld 2,8(2) 56 mtlr 0 57 58CNAME(sigcode64_elfv2): 59 addi 1,1,-112 /* reserved space for callee */ 60 mflr 12 /* ELFv2 wants the address in r12 */ 61 blrl 62 63 addi 3,1,112+SF_UC /* restore sp, and get &frame->sf_uc */ 64 li 0,SYS_sigreturn 65 sc /* sigreturn(scp) */ 66 li 0,SYS_exit 67 sc /* exit(errno) */ 68 nop /* align to doubleword */ 69endsigcode64: 70 71 .data 72CNAME(szsigcode64): 73 .long endsigcode64 - CNAME(sigcode64) 74CNAME(szsigcode64_elfv2): 75 .long endsigcode64 - CNAME(sigcode64_elfv2) 76 77