1/* $NetBSD: linux_sigcode.S,v 1.2 2001/04/11 19:41:02 manu Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * The following code is just a copy from sys/arch/powerpc/powerpc/sigcode.S 36 * Obviously, there are little chance that it works for Linux emulation, so 37 * it will have to be rewritten. 38 * Emmanuel Dreyfus <p99dreyf@criens.u-psud.fr> 39 */ 40 41#include <machine/asm.h> 42 43#include <compat/linux/linux_syscall.h> 44 45/* 46 * This is copied from sys/compat/linux/arch/powerpc/linux_machdep.h 47 */ 48#define LINUX__SIGNAL_FRAMESIZE 64 49 50/* 51 * The following code gets copied to the top of the user stack on process 52 * execution. It does signal trampolining on signal delivery. 53 * 54 * On entry r1 points to a struct sigframe at bottom of current stack. 55 * All other registers are unchanged. 56 * 57 * XXX Linux just does this: 58 * 0x38007777 li r0,0x7777 59 * 0x44000002 sc 60 */ 61 .globl _C_LABEL(linux_sigcode),_C_LABEL(linux_esigcode) 62_C_LABEL(linux_sigcode): 63 addi 1,1,-16 /* reserved space for callee */ 64 blrl 65 addi 3,1,16+LINUX__SIGNAL_FRAMESIZE /* compute &sf_sc */ 66 li 0,LINUX_SYS_sigreturn 67 sc /* linux_sys_sigreturn(scp) */ 68 li 0,LINUX_SYS_exit 69 sc /* linux_sys_exit(errno) */ 70_C_LABEL(linux_esigcode): 71