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 NOT restored. 51 */ 52 53ENTRY(_setjmp) 54 movq %rdi,%rax 55 movq 0(%rsp),%rdx /* retval */ 56 movq %rdx, 0(%rax) /* 0; retval */ 57 movq %rbx, 8(%rax) /* 1; rbx */ 58 movq %rsp,16(%rax) /* 2; rsp */ 59 movq %rbp,24(%rax) /* 3; rbp */ 60 movq %r12,32(%rax) /* 4; r12 */ 61 movq %r13,40(%rax) /* 5; r13 */ 62 movq %r14,48(%rax) /* 6; r14 */ 63 movq %r15,56(%rax) /* 7; r15 */ 64 fnstcw 64(%rax) /* 8; fpu cw */ 65 xorq %rax,%rax 66 ret 67 68 .weak CNAME(_longjmp) 69 .set CNAME(_longjmp),CNAME(___longjmp) 70ENTRY(___longjmp) 71 movq %rdi,%rdx 72 movq %rsi,%rax /* retval */ 73 movq 0(%rdx),%rcx 74 movq 8(%rdx),%rbx 75 movq 16(%rdx),%rsp 76 movq 24(%rdx),%rbp 77 movq 32(%rdx),%r12 78 movq 40(%rdx),%r13 79 movq 48(%rdx),%r14 80 movq 56(%rdx),%r15 81 fninit 82 fldcw 64(%rdx) 83 testq %rax,%rax 84 jnz 1f 85 incq %rax 861: movq %rcx,0(%rsp) 87 ret 88