1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)setjmp.s 5.1 (Berkeley) 4/23/90" 33 */ 34 35#if defined(LIBC_SCCS) && !defined(lint) 36 .text 37 .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $" 38#endif /* LIBC_SCCS and not lint */ 39#include <machine/asm.h> 40#include "SYS.h" 41 42/*- 43 * TODO: 44 * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, 45 * remove the other *jmp functions and define everything in terms 46 * of the renamed functions. This requires compiler support for 47 * the renamed functions (introduced in gcc-2.5.3; previous versions 48 * only supported *jmp with 0 or 1 leading underscores). 49 * 50 * Restore _all_ the registers and the signal mask atomically. Can 51 * use sigreturn() if sigreturn() works. 52 */ 53 54ENTRY(sigsetjmp) 55 movl %esi,88(%rdi) /* 11; savemask */ 56 testl %esi,%esi 57 jz 2f 58 pushq %rdi 59 movq %rdi,%rcx 60 movq $1,%rdi /* SIG_BLOCK */ 61 movq $0,%rsi /* (sigset_t*)set */ 62 leaq 72(%rcx),%rdx /* 9,10 (sigset_t*)oset */ 63 /* stack is 16-byte aligned */ 64 call __libc_sigprocmask 65 popq %rdi 662: movq %rdi,%rcx 67 movq 0(%rsp),%rdx /* return address */ 68 movq %rdx, 0(%rcx) /* 0; return address */ 69 movq %rbx, 8(%rcx) /* 1; rbx */ 70 movq %rsp,16(%rcx) /* 2; rsp */ 71 movq %rbp,24(%rcx) /* 3; rbp */ 72 movq %r12,32(%rcx) /* 4; r12 */ 73 movq %r13,40(%rcx) /* 5; r13 */ 74 movq %r14,48(%rcx) /* 6; r14 */ 75 movq %r15,56(%rcx) /* 7; r15 */ 76 fnstcw 64(%rcx) /* 8; fpu cw */ 77 xorq %rax,%rax 78 ret 79END(sigsetjmp) 80 81 WEAK_REFERENCE(__siglongjmp, siglongjmp) 82ENTRY(__siglongjmp) 83 cmpl $0,88(%rdi) 84 jz 2f 85 movq %rdi,%rdx 86 pushq %rdi 87 pushq %rsi 88 movq $3,%rdi /* SIG_SETMASK */ 89 leaq 72(%rdx),%rsi /* (sigset_t*)set */ 90 movq $0,%rdx /* (sigset_t*)oset */ 91 subq $0x8,%rsp /* make the stack 16-byte aligned */ 92 call __libc_sigprocmask 93 addq $0x8,%rsp 94 popq %rsi 95 popq %rdi /* jmpbuf */ 962: movq %rdi,%rdx 97 movq %rsi,%rax /* retval */ 98 movq 0(%rdx),%rcx 99 movq 8(%rdx),%rbx 100 movq 16(%rdx),%rsp 101 movq 24(%rdx),%rbp 102 movq 32(%rdx),%r12 103 movq 40(%rdx),%r13 104 movq 48(%rdx),%r14 105 movq 56(%rdx),%r15 106 fldcw 64(%rdx) 107 testq %rax,%rax 108 jnz 1f 109 incq %rax 1101: movq %rcx,0(%rsp) /* return address */ 111 ret 112END(__siglongjmp) 113 114 .section .note.GNU-stack,"",%progbits 115