1/* $OpenBSD: _setjmp.S,v 1.1 2004/01/28 01:44:45 mickey Exp $ */ 2/* $NetBSD: _setjmp.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $ */ 3 4/* 5 * Copyright (c) 2001 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Frank van der Linden for Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40#include <machine/asm.h> 41#include <machine/setjmp.h> 42 43/* 44 * C library -- _setjmp, _longjmp 45 * 46 * _longjmp(a,v) 47 * will generate a "return(v)" from the last call to 48 * _setjmp(a) 49 * by restoring registers from the stack. 50 * The previous signal state is NOT restored. 51 */ 52 53ENTRY(_setjmp) 54 movq (%rsp),%r11 55 movq %rbx,(_JB_RBX * 8)(%rdi) 56 movq %rbp,(_JB_RBP * 8)(%rdi) 57 movq %r12,(_JB_R12 * 8)(%rdi) 58 movq %r13,(_JB_R13 * 8)(%rdi) 59 movq %r14,(_JB_R14 * 8)(%rdi) 60 movq %r15,(_JB_R15 * 8)(%rdi) 61 movq %rsp,(_JB_RSP * 8)(%rdi) 62 movq %r11,(_JB_PC * 8)(%rdi) 63 64 xorl %eax,%eax 65 ret 66 67ENTRY(_longjmp) 68 movq (_JB_RBX * 8)(%rdi),%rbx 69 movq (_JB_RBP * 8)(%rdi),%rbp 70 movq (_JB_R12 * 8)(%rdi),%r12 71 movq (_JB_R13 * 8)(%rdi),%r13 72 movq (_JB_R14 * 8)(%rdi),%r14 73 movq (_JB_R15 * 8)(%rdi),%r15 74 movq (_JB_RSP * 8)(%rdi),%rsp 75 movq (_JB_PC * 8)(%rdi),%r11 76 77 movl %esi,%eax 78 testl %eax,%eax 79 jnz 1f 80 incl %eax 811: movq %r11,0(%rsp) 82 ret 83