1/* $NetBSD: _setjmp.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $ */ 2 3/* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Frank van der Linden for Wasabi Systems, Inc. 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 for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 39#include <machine/asm.h> 40#include <machine/setjmp.h> 41#if defined(LIBC_SCCS) 42 RCSID("$NetBSD: _setjmp.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $") 43#endif 44 45/* 46 * C library -- _setjmp, _longjmp 47 * 48 * _longjmp(a,v) 49 * will generate a "return(v)" from the last call to 50 * _setjmp(a) 51 * by restoring registers from the stack. 52 * The previous signal state is NOT restored. 53 */ 54 55ENTRY(_setjmp) 56 movq (%rsp),%r11 57 movq %rbx,(_JB_RBX * 8)(%rdi) 58 movq %rbp,(_JB_RBP * 8)(%rdi) 59 movq %r12,(_JB_R12 * 8)(%rdi) 60 movq %r13,(_JB_R13 * 8)(%rdi) 61 movq %r14,(_JB_R14 * 8)(%rdi) 62 movq %r15,(_JB_R15 * 8)(%rdi) 63 movq %rsp,(_JB_RSP * 8)(%rdi) 64 movq %r11,(_JB_PC * 8)(%rdi) 65 66 xorl %eax,%eax 67 ret 68 69ENTRY(_longjmp) 70 movq (_JB_RBX * 8)(%rdi),%rbx 71 movq (_JB_RBP * 8)(%rdi),%rbp 72 movq (_JB_R12 * 8)(%rdi),%r12 73 movq (_JB_R13 * 8)(%rdi),%r13 74 movq (_JB_R14 * 8)(%rdi),%r14 75 movq (_JB_R15 * 8)(%rdi),%r15 76 movq (_JB_RSP * 8)(%rdi),%rsp 77 movq (_JB_PC * 8)(%rdi),%r11 78 79 movl %esi,%eax 80 testl %eax,%eax 81 jnz 1f 82 incl %eax 831: movq %r11,0(%rsp) 84 ret 85