sigsetjmp.S revision 217106
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 * 4. 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 $" 38#endif /* LIBC_SCCS and not lint */ 39#include <machine/asm.h> 40__FBSDID("$FreeBSD: head/lib/libc/amd64/gen/sigsetjmp.S 217106 2011-01-07 16:08:40Z kib $"); 41 42#include "SYS.h" 43 44/*- 45 * TODO: 46 * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, 47 * remove the other *jmp functions and define everything in terms 48 * of the renamed functions. This requires compiler support for 49 * the renamed functions (introduced in gcc-2.5.3; previous versions 50 * only supported *jmp with 0 or 1 leading underscores). 51 * 52 * Restore _all_ the registers and the signal mask atomically. Can 53 * use sigreturn() if sigreturn() works. 54 */ 55 56ENTRY(sigsetjmp) 57 movl %esi,88(%rdi) /* 11; savemask */ 58 testl %esi,%esi 59 jz 2f 60 pushq %rdi 61 movq %rdi,%rcx 62 movq $1,%rdi /* SIG_BLOCK */ 63 movq $0,%rsi /* (sigset_t*)set */ 64 leaq 72(%rcx),%rdx /* 9,10 (sigset_t*)oset */ 65 call PIC_PLT(CNAME(_sigprocmask)) 66 popq %rdi 672: movq %rdi,%rcx 68 movq 0(%rsp),%rdx /* retval */ 69 movq %rdx, 0(%rcx) /* 0; retval */ 70 movq %rbx, 8(%rcx) /* 1; rbx */ 71 movq %rsp,16(%rcx) /* 2; rsp */ 72 movq %rbp,24(%rcx) /* 3; rbp */ 73 movq %r12,32(%rcx) /* 4; r12 */ 74 movq %r13,40(%rcx) /* 5; r13 */ 75 movq %r14,48(%rcx) /* 6; r14 */ 76 movq %r15,56(%rcx) /* 7; r15 */ 77 fnstcw 64(%rcx) /* 8; fpu cw */ 78 xorq %rax,%rax 79 ret 80END(sigsetjmp) 81 82 .weak CNAME(siglongjmp) 83 .set CNAME(siglongjmp),CNAME(__siglongjmp) 84ENTRY(__siglongjmp) 85 cmpl $0,88(%rdi) 86 jz 2f 87 movq %rdi,%rdx 88 pushq %rdi 89 pushq %rsi 90 movq $3,%rdi /* SIG_SETMASK */ 91 leaq 72(%rdx),%rsi /* (sigset_t*)set */ 92 movq $0,%rdx /* (sigset_t*)oset */ 93 call PIC_PLT(CNAME(_sigprocmask)) 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 fninit 107 fldcw 64(%rdx) 108 testq %rax,%rax 109 jnz 1f 110 incq %rax 1111: movq %rcx,0(%rsp) 112 ret 113END(__siglongjmp) 114 115 .section .note.GNU-stack,"",%progbits 116