1199767f8SToomas Soome/*- 2199767f8SToomas Soome * Copyright (c) 1990 The Regents of the University of California. 3199767f8SToomas Soome * All rights reserved. 4199767f8SToomas Soome * 5199767f8SToomas Soome * This code is derived from software contributed to Berkeley by 6199767f8SToomas Soome * William Jolitz. 7199767f8SToomas Soome * 8199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without 9199767f8SToomas Soome * modification, are permitted provided that the following conditions 10199767f8SToomas Soome * are met: 11199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright 12199767f8SToomas Soome * notice, this list of conditions and the following disclaimer. 13199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 14199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the 15199767f8SToomas Soome * documentation and/or other materials provided with the distribution. 161974da4bSToomas Soome * 3. Neither the name of the University nor the names of its contributors 17199767f8SToomas Soome * may be used to endorse or promote products derived from this software 18199767f8SToomas Soome * without specific prior written permission. 19199767f8SToomas Soome * 20199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30199767f8SToomas Soome * SUCH DAMAGE. 31199767f8SToomas Soome */ 32199767f8SToomas Soome 33199767f8SToomas Soome#if defined(LIBC_SCCS) && !defined(lint) 34199767f8SToomas Soome .asciz "@(#)_setjmp.s 5.1 (Berkeley) 4/23/90" 35199767f8SToomas Soome#endif /* LIBC_SCCS and not lint */ 36199767f8SToomas Soome#include <machine/asm.h> 37199767f8SToomas Soome__FBSDID("$FreeBSD$"); 38199767f8SToomas Soome 39199767f8SToomas Soome/* 40199767f8SToomas Soome * C library -- _setjmp, _longjmp 41199767f8SToomas Soome * 42199767f8SToomas Soome * _longjmp(a,v) 43199767f8SToomas Soome * will generate a "return(v)" from the last call to 44199767f8SToomas Soome * _setjmp(a) 45199767f8SToomas Soome * by restoring registers from the environment 'a'. 46199767f8SToomas Soome * The previous signal state is NOT restored. 47199767f8SToomas Soome */ 48199767f8SToomas Soome 49199767f8SToomas SoomeENTRY(_setjmp) 50199767f8SToomas Soome movq %rdi,%rax 51199767f8SToomas Soome movq 0(%rsp),%rdx /* retval */ 52199767f8SToomas Soome movq %rdx, 0(%rax) /* 0; retval */ 53199767f8SToomas Soome movq %rbx, 8(%rax) /* 1; rbx */ 54199767f8SToomas Soome movq %rsp,16(%rax) /* 2; rsp */ 55199767f8SToomas Soome movq %rbp,24(%rax) /* 3; rbp */ 56199767f8SToomas Soome movq %r12,32(%rax) /* 4; r12 */ 57199767f8SToomas Soome movq %r13,40(%rax) /* 5; r13 */ 58199767f8SToomas Soome movq %r14,48(%rax) /* 6; r14 */ 59199767f8SToomas Soome movq %r15,56(%rax) /* 7; r15 */ 60199767f8SToomas Soome fnstcw 64(%rax) /* 8; fpu cw */ 61199767f8SToomas Soome stmxcsr 68(%rax) /* and mxcsr */ 62199767f8SToomas Soome xorq %rax,%rax 63199767f8SToomas Soome ret 64199767f8SToomas SoomeEND(_setjmp) 65199767f8SToomas Soome 66199767f8SToomas Soome .weak CNAME(_longjmp) 67199767f8SToomas SoomeENTRY(_longjmp) 68199767f8SToomas Soome movq %rdi,%rdx 69199767f8SToomas Soome /* Restore the mxcsr, but leave exception flags intact. */ 70199767f8SToomas Soome stmxcsr -4(%rsp) 71199767f8SToomas Soome movl 68(%rdx),%eax 72199767f8SToomas Soome andl $0xffffffc0,%eax 73199767f8SToomas Soome movl -4(%rsp),%edi 74199767f8SToomas Soome andl $0x3f,%edi 75199767f8SToomas Soome xorl %eax,%edi 76199767f8SToomas Soome movl %edi,-4(%rsp) 77199767f8SToomas Soome ldmxcsr -4(%rsp) 78199767f8SToomas Soome movq %rsi,%rax /* retval */ 79199767f8SToomas Soome movq 0(%rdx),%rcx 80199767f8SToomas Soome movq 8(%rdx),%rbx 81199767f8SToomas Soome movq 16(%rdx),%rsp 82199767f8SToomas Soome movq 24(%rdx),%rbp 83199767f8SToomas Soome movq 32(%rdx),%r12 84199767f8SToomas Soome movq 40(%rdx),%r13 85199767f8SToomas Soome movq 48(%rdx),%r14 86199767f8SToomas Soome movq 56(%rdx),%r15 87199767f8SToomas Soome fldcw 64(%rdx) 88199767f8SToomas Soome testq %rax,%rax 89199767f8SToomas Soome jnz 1f 90199767f8SToomas Soome incq %rax 91199767f8SToomas Soome1: movq %rcx,0(%rsp) 92199767f8SToomas Soome ret 93199767f8SToomas SoomeEND(_longjmp) 94