1/* $NetBSD: sigcode.s,v 1.16 2024/01/17 12:33:50 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1980, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: locore.s 1.66 92/12/22$ 37 * 38 * @(#)locore.s 8.6 (Berkeley) 5/27/94 39 */ 40 41#include <machine/asm.h> 42 43#include "assym.h" 44 45 .file "sigcode.s" 46 47/* 48 * Signal trampoline; copied to top of user stack. 49 * 50 * The handler has returned here as if we had called it. On 51 * entry, the stack looks like: 52 * 53 * sigcontext structure [12] 54 * pointer to sigcontext structure [8] 55 * signal specific code [4] 56 * sp-> signal number [0] 57 */ 58 59 .data 60 .align 2 61GLOBAL(sigcode) 62 leal 12(%sp),%a0 /* get pointer to sigcontext */ 63 movl %a0,4(%sp) /* put it in the argument slot */ 64 /* fake return address already there */ 65 trap #3 /* special sigreturn trap */ 66 movl %d0,4(%sp) /* exit with errno */ 67 moveq #SYS_exit,%d0 /* if sigreturn fails */ 68 trap #0 69 70 .align 2 71GLOBAL(esigcode) 72