sigsetjmp.S revision 114309
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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)setjmp.s 5.1 (Berkeley) 4/23/90" 37 */ 38 39#if defined(LIBC_SCCS) && !defined(lint) 40 .text 41 .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $" 42#endif /* LIBC_SCCS and not lint */ 43#include <machine/asm.h> 44__FBSDID("$FreeBSD: head/lib/libc/amd64/gen/sigsetjmp.S 114309 2003-04-30 18:09:33Z peter $"); 45 46#include "SYS.h" 47 48/*- 49 * TODO: 50 * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, 51 * remove the other *jmp functions and define everything in terms 52 * of the renamed functions. This requires compiler support for 53 * the renamed functions (introduced in gcc-2.5.3; previous versions 54 * only supported *jmp with 0 or 1 leading underscores). 55 * 56 * Restore _all_ the registers and the signal mask atomically. Can 57 * use sigreturn() if sigreturn() works. 58 */ 59 60ENTRY(sigsetjmp) 61 pushq %rdi 62 movq %rdi,%rcx 63 movl %esi,88(%rcx) 64 testl %esi,%esi 65 jz 2f 66 leaq 72(%rcx),%rdi /* (sigset_t*)oset */ 67 movq $0,%rsi /* (sigset_t*)set */ 68 movq $1,%rdx /* SIG_BLOCK */ 69 call PIC_PLT(CNAME(_sigprocmask)) 70 popq %rdi 71 movq %rdi,%rcx 722: movq 0(%rsp),%rdx /* retval */ 73 movq %rdx, 0(%rcx) /* retval */ 74 movq %rbx, 8(%rcx) 75 movq %rsp,16(%rcx) 76 movq %rbp,24(%rcx) 77 movq %r12,32(%rcx) 78 movq %r13,40(%rcx) 79 movq %r14,48(%rcx) 80 movq %r15,56(%rcx) 81 fnstcw 64(%rcx) 82 xorq %rax,%rax 83 ret 84 85 .weak CNAME(siglongjmp) 86 .set CNAME(siglongjmp),CNAME(__siglongjmp) 87ENTRY(__siglongjmp) 88 cmpl $0,88(%rdi) 89 jz 2f 90 movq %rdi,%rdx 91 pushq %rdi 92 pushq %rsi 93 movq $0,%rdi /* (sigset_t*)oset */ 94 leaq 72(%rdx),%rsi /* (sigset_t*)set */ 95 movq $3,%rdx /* SIG_SETMASK */ 96 call PIC_PLT(CNAME(_sigprocmask)) 97 popq %rsi 98 popq %rdi /* jmpbuf */ 992: movq %rdi,%rdx 100 movq %rsi,%rax /* retval */ 101 movq 0(%rdx),%rcx 102 movq 8(%rdx),%rbx 103 movq 16(%rdx),%rsp 104 movq 24(%rdx),%rbp 105 movq 32(%rdx),%r12 106 movq 40(%rdx),%r13 107 movq 48(%rdx),%r14 108 movq 56(%rdx),%r15 109 fninit 110 fldcw 64(%rdx) 111 testq %rax,%rax 112 jnz 1f 113 incq %rax 1141: movq %rcx,0(%rsp) 115 ret 116