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 37#if defined(LIBC_SCCS) && !defined(lint) 38 .asciz "@(#)setjmp.s 5.1 (Berkeley) 4/23/90" 39#endif /* LIBC_SCCS and not lint */ 40#include <machine/asm.h> 41__FBSDID("$FreeBSD$"); 42 43/* 44 * C library -- _setjmp, _longjmp 45 * 46 * longjmp(a,v) 47 * will generate a "return(v)" from the last call to 48 * setjmp(a) 49 * by restoring registers from the environment 'a'. 50 * The previous signal state is restored. 51 */ 52 53#include "SYS.h" 54 55ENTRY(setjmp) 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 call PIC_PLT(CNAME(_sigprocmask)) 62 popq %rdi 63 movq %rdi,%rcx 64 movq 0(%rsp),%rdx /* retval */ 65 movq %rdx, 0(%rcx) /* 0; retval */ 66 movq %rbx, 8(%rcx) /* 1; rbx */ 67 movq %rsp,16(%rcx) /* 2; rsp */ 68 movq %rbp,24(%rcx) /* 3; rbp */ 69 movq %r12,32(%rcx) /* 4; r12 */ 70 movq %r13,40(%rcx) /* 5; r13 */ 71 movq %r14,48(%rcx) /* 6; r14 */ 72 movq %r15,56(%rcx) /* 7; r15 */ 73 fnstcw 64(%rcx) /* 8; fpu cw */ 74 xorq %rax,%rax 75 ret 76 77 .weak CNAME(longjmp) 78 .set CNAME(longjmp),CNAME(__longjmp) 79ENTRY(__longjmp) 80 pushq %rdi 81 pushq %rsi 82 movq %rdi,%rdx 83 movq $3,%rdi /* SIG_SETMASK */ 84 leaq 72(%rdx),%rsi /* (sigset_t*)set */ 85 movq $0,%rdx /* (sigset_t*)oset */ 86 call PIC_PLT(CNAME(_sigprocmask)) 87 popq %rsi 88 popq %rdi /* jmpbuf */ 89 movq %rdi,%rdx 90 movq %rsi,%rax /* retval */ 91 movq 0(%rdx),%rcx 92 movq 8(%rdx),%rbx 93 movq 16(%rdx),%rsp 94 movq 24(%rdx),%rbp 95 movq 32(%rdx),%r12 96 movq 40(%rdx),%r13 97 movq 48(%rdx),%r14 98 movq 56(%rdx),%r15 99 fninit 100 fldcw 64(%rdx) 101 testq %rax,%rax 102 jnz 1f 103 incq %rax 1041: movq %rcx,0(%rsp) 105 ret 106