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 33#if defined(LIBC_SCCS) && !defined(lint) 34 .text 35 .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $" 36#endif /* LIBC_SCCS and not lint */ 37#include <machine/asm.h> 38#include "SYS.h" 39 40/*- 41 * TODO: 42 * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, 43 * remove the other *jmp functions and define everything in terms 44 * of the renamed functions. This requires compiler support for 45 * the renamed functions (introduced in gcc-2.5.3; previous versions 46 * only supported *jmp with 0 or 1 leading underscores). 47 * 48 * Restore _all_ the registers and the signal mask atomically. Can 49 * use sigreturn() if sigreturn() works. 50 */ 51 52ENTRY(sigsetjmp) 53 movl %esi,88(%rdi) /* 11; savemask */ 54 testl %esi,%esi 55 jz 2f 56 pushq %rdi 57 movq %rdi,%rcx 58 movq $1,%rdi /* SIG_BLOCK */ 59 movq $0,%rsi /* (sigset_t*)set */ 60 leaq 72(%rcx),%rdx /* 9,10 (sigset_t*)oset */ 61 /* stack is 16-byte aligned */ 62 call __libc_sigprocmask 63 popq %rdi 642: movq %rdi,%rcx 65 movq 0(%rsp),%rdx /* return address */ 66 movq %rdx, 0(%rcx) /* 0; return address */ 67 movq %rbx, 8(%rcx) /* 1; rbx */ 68 movq %rsp,16(%rcx) /* 2; rsp */ 69 movq %rbp,24(%rcx) /* 3; rbp */ 70 movq %r12,32(%rcx) /* 4; r12 */ 71 movq %r13,40(%rcx) /* 5; r13 */ 72 movq %r14,48(%rcx) /* 6; r14 */ 73 movq %r15,56(%rcx) /* 7; r15 */ 74 fnstcw 64(%rcx) /* 8; fpu cw */ 75 xorq %rax,%rax 76 ret 77END(sigsetjmp) 78 79 WEAK_REFERENCE(__siglongjmp, siglongjmp) 80ENTRY(__siglongjmp) 81 cmpl $0,88(%rdi) 82 jz 2f 83 movq %rdi,%rdx 84 pushq %rdi 85 pushq %rsi 86 movq $3,%rdi /* SIG_SETMASK */ 87 leaq 72(%rdx),%rsi /* (sigset_t*)set */ 88 movq $0,%rdx /* (sigset_t*)oset */ 89 subq $0x8,%rsp /* make the stack 16-byte aligned */ 90 call __libc_sigprocmask 91 addq $0x8,%rsp 92 popq %rsi 93 popq %rdi /* jmpbuf */ 942: movq %rdi,%rdx 95 movq %rsi,%rax /* retval */ 96 movq 0(%rdx),%rcx 97 movq 8(%rdx),%rbx 98 movq 16(%rdx),%rsp 99 movq 24(%rdx),%rbp 100 movq 32(%rdx),%r12 101 movq 40(%rdx),%r13 102 movq 48(%rdx),%r14 103 movq 56(%rdx),%r15 104 fldcw 64(%rdx) 105 testq %rax,%rax 106 jnz 1f 107 incq %rax 1081: movq %rcx,0(%rsp) /* return address */ 109 ret 110END(__siglongjmp) 111 112 .section .note.GNU-stack,"",%progbits 113