setjmp.S revision 851e68a2402fa414544e66650e09dfdaac813e51
1/* $OpenBSD: setjmp.S,v 1.3 2012/08/22 17:19:34 pascal Exp $ */ 2/* $NetBSD: __setjmp14.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#include <private/bionic_asm.h> 40#include <machine/setjmp.h> 41 42/* 43 * C library -- _setjmp, _longjmp 44 * 45 * longjmp(a,v) 46 * will generate a "return(v)" from the last call to 47 * setjmp(a) 48 * by restoring registers from the stack. 49 * The previous signal state is restored. 50 */ 51 52ENTRY(setjmp) 53 pushq %rdi 54 xorq %rdi,%rdi 55#ifdef __PIC__ 56 call PIC_PLT(sigblock) 57#else 58 call sigblock 59#endif 60 popq %rdi 61 movq %rax,(_JB_SIGMASK * 8)(%rdi) 62 63 movq (%rsp),%r11 64 movq %rbx,(_JB_RBX * 8)(%rdi) 65 movq %rbp,(_JB_RBP * 8)(%rdi) 66 movq %r12,(_JB_R12 * 8)(%rdi) 67 movq %r13,(_JB_R13 * 8)(%rdi) 68 movq %r14,(_JB_R14 * 8)(%rdi) 69 movq %r15,(_JB_R15 * 8)(%rdi) 70 movq %rsp,(_JB_RSP * 8)(%rdi) 71 movq %r11,(_JB_PC * 8)(%rdi) 72 732: xorl %eax,%eax 74 ret 75END(setjmp) 76 77ENTRY(longjmp) 78 movq %rdi,%r12 79 movl %esi,%r8d 80 81 movq (_JB_SIGMASK * 8)(%rdi),%rdi 82 pushq %r8 83#ifdef __PIC__ 84 call PIC_PLT(sigsetmask) 85#else 86 call sigsetmask 87#endif 88 popq %r8 89 movq (_JB_RBX * 8)(%r12),%rbx 90 movq (_JB_RBP * 8)(%r12),%rbp 91 movq (_JB_R13 * 8)(%r12),%r13 92 movq (_JB_R14 * 8)(%r12),%r14 93 movq (_JB_R15 * 8)(%r12),%r15 94 movq (_JB_RSP * 8)(%r12),%rsp 95 movq (_JB_PC * 8)(%r12),%r11 96 movq (_JB_R12 * 8)(%r12),%r12 97 98 movl %r8d,%eax 99 testl %eax,%eax 100 jnz 1f 101 incl %eax 1021: movq %r11,0(%rsp) 103 ret 104END(longjmp) 105