1/* $OpenBSD: sigcode.S,v 1.9 2020/03/13 08:46:50 deraadt Exp $ */ 2/* $NetBSD: sigcode.S,v 1.6 2003/10/05 19:44:58 matt Exp $ */ 3 4/* 5 * Copyright (C) 1994-1997 Mark Brinicombe 6 * Copyright (C) 1994 Brini 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 Brini. 20 * 4. The name of Brini 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 BRINI ``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 BRINI 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 "assym.h" 36 37#include <sys/syscall.h> 38 39#include <machine/asm.h> 40 41/* 42 * Signal trampoline; 43 */ 44 45 .section .rodata 46 .align 2 47 .globl sigcode 48 .type x,_ASM_TYPE_FUNCTION 49sigcode: 50/* 51 * The kernel arranges for the handler to be invoked directly. This 52 * trampoline is used only to return from the signal. 53 * 54 * The stack pointer points to the saved sigcontext. 55 */ 56/* mov r0, sp */ 57 add r0, sp, #SIGF_SC 58 mov r12, #SYS_sigreturn 59 swi SYS_sigreturn 60 nop 61 nop 62 .globl _C_LABEL(sigcoderet) 63_C_LABEL(sigcoderet): 64 /* Well if that failed we better exit quick ! */ 65 swi SYS_exit 66 nop 67 nop 68 69 .align 2 70 .global _C_LABEL(esigcode) 71_C_LABEL(esigcode): 72 73 .globl sigfill 74sigfill: 75 .word 0xa000f7f0 /* illegal on all cpus? */ 76esigfill: 77 78 .data 79 .align 2 80 .globl sigfillsiz 81sigfillsiz: 82 .word esigfill - sigfill 83 84 .text 85