11849Swollman/*- 21849Swollman * Copyright (c) 1990 The Regents of the University of California. 31849Swollman * All rights reserved. 41849Swollman * 51849Swollman * This code is derived from software contributed to Berkeley by 61849Swollman * William Jolitz. 71849Swollman * 81849Swollman * Redistribution and use in source and binary forms, with or without 91849Swollman * modification, are permitted provided that the following conditions 101849Swollman * are met: 111849Swollman * 1. Redistributions of source code must retain the above copyright 121849Swollman * notice, this list of conditions and the following disclaimer. 131849Swollman * 2. Redistributions in binary form must reproduce the above copyright 141849Swollman * notice, this list of conditions and the following disclaimer in the 151849Swollman * documentation and/or other materials provided with the distribution. 161849Swollman * 4. Neither the name of the University nor the names of its contributors 171849Swollman * may be used to endorse or promote products derived from this software 181849Swollman * without specific prior written permission. 191849Swollman * 201849Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211849Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221849Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231849Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241849Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251849Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261849Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271849Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281849Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291849Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301849Swollman * SUCH DAMAGE. 311849Swollman */ 321849Swollman 3392999Sobrien#if defined(LIBC_SCCS) && !defined(lint) 3492999Sobrien .asciz "@(#)_setjmp.s 5.1 (Berkeley) 4/23/90" 3592999Sobrien#endif /* LIBC_SCCS and not lint */ 3692999Sobrien#include <machine/asm.h> 3792999Sobrien__FBSDID("$FreeBSD$"); 381849Swollman 391849Swollman/* 401849Swollman * C library -- _setjmp, _longjmp 411849Swollman * 421849Swollman * _longjmp(a,v) 431849Swollman * will generate a "return(v)" from the last call to 441849Swollman * _setjmp(a) 451849Swollman * by restoring registers from the environment 'a'. 461849Swollman * The previous signal state is NOT restored. 471849Swollman */ 481849Swollman 4956345SjasoneENTRY(_setjmp) 50114309Speter movq %rdi,%rax 51114309Speter movq 0(%rsp),%rdx /* retval */ 52115745Speter movq %rdx, 0(%rax) /* 0; retval */ 53115745Speter movq %rbx, 8(%rax) /* 1; rbx */ 54115745Speter movq %rsp,16(%rax) /* 2; rsp */ 55115745Speter movq %rbp,24(%rax) /* 3; rbp */ 56115745Speter movq %r12,32(%rax) /* 4; r12 */ 57115745Speter movq %r13,40(%rax) /* 5; r13 */ 58115745Speter movq %r14,48(%rax) /* 6; r14 */ 59115745Speter movq %r15,56(%rax) /* 7; r15 */ 60115745Speter fnstcw 64(%rax) /* 8; fpu cw */ 61180080Sdas stmxcsr 68(%rax) /* and mxcsr */ 62114309Speter xorq %rax,%rax 631849Swollman ret 64184547SpeterEND(_setjmp) 651849Swollman 6671579Sdeischen .weak CNAME(_longjmp) 6771579Sdeischen .set CNAME(_longjmp),CNAME(___longjmp) 6856345SjasoneENTRY(___longjmp) 69114309Speter movq %rdi,%rdx 70180080Sdas /* Restore the mxcsr, but leave exception flags intact. */ 71180080Sdas stmxcsr -4(%rsp) 72180080Sdas movl 68(%rdx),%eax 73180080Sdas andl $0xffffffc0,%eax 74180080Sdas movl -4(%rsp),%edi 75180080Sdas andl $0x3f,%edi 76180080Sdas xorl %eax,%edi 77180080Sdas movl %edi,-4(%rsp) 78180080Sdas ldmxcsr -4(%rsp) 79114309Speter movq %rsi,%rax /* retval */ 80114309Speter movq 0(%rdx),%rcx 81114309Speter movq 8(%rdx),%rbx 82114309Speter movq 16(%rdx),%rsp 83114309Speter movq 24(%rdx),%rbp 84114309Speter movq 32(%rdx),%r12 85114309Speter movq 40(%rdx),%r13 86114309Speter movq 48(%rdx),%r14 87114309Speter movq 56(%rdx),%r15 88114309Speter fldcw 64(%rdx) 89114309Speter testq %rax,%rax 901849Swollman jnz 1f 91114309Speter incq %rax 92114309Speter1: movq %rcx,0(%rsp) 931849Swollman ret 94184547SpeterEND(___longjmp) 95217106Skib 96217106Skib .section .note.GNU-stack,"",%progbits 97