94 lines
3.0 KiB
ArmAsm
94 lines
3.0 KiB
ArmAsm
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
.asciz "@(#)_setjmp.s 5.1 (Berkeley) 4/23/90"
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <machine/asm.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* C library -- _setjmp, _longjmp
|
|
*
|
|
* _longjmp(a,v)
|
|
* will generate a "return(v)" from the last call to
|
|
* _setjmp(a)
|
|
* by restoring registers from the environment 'a'.
|
|
* The previous signal state is NOT restored.
|
|
*/
|
|
|
|
ENTRY(_setjmp)
|
|
movq %rdi,%rax
|
|
movq 0(%rsp),%rdx /* retval */
|
|
movq %rdx, 0(%rax) /* 0; retval */
|
|
movq %rbx, 8(%rax) /* 1; rbx */
|
|
movq %rsp,16(%rax) /* 2; rsp */
|
|
movq %rbp,24(%rax) /* 3; rbp */
|
|
movq %r12,32(%rax) /* 4; r12 */
|
|
movq %r13,40(%rax) /* 5; r13 */
|
|
movq %r14,48(%rax) /* 6; r14 */
|
|
movq %r15,56(%rax) /* 7; r15 */
|
|
fnstcw 64(%rax) /* 8; fpu cw */
|
|
stmxcsr 68(%rax) /* and mxcsr */
|
|
xorq %rax,%rax
|
|
ret
|
|
END(_setjmp)
|
|
|
|
.weak CNAME(_longjmp)
|
|
ENTRY(_longjmp)
|
|
movq %rdi,%rdx
|
|
/* Restore the mxcsr, but leave exception flags intact. */
|
|
stmxcsr -4(%rsp)
|
|
movl 68(%rdx),%eax
|
|
andl $0xffffffc0,%eax
|
|
movl -4(%rsp),%edi
|
|
andl $0x3f,%edi
|
|
xorl %eax,%edi
|
|
movl %edi,-4(%rsp)
|
|
ldmxcsr -4(%rsp)
|
|
movq %rsi,%rax /* retval */
|
|
movq 0(%rdx),%rcx
|
|
movq 8(%rdx),%rbx
|
|
movq 16(%rdx),%rsp
|
|
movq 24(%rdx),%rbp
|
|
movq 32(%rdx),%r12
|
|
movq 40(%rdx),%r13
|
|
movq 48(%rdx),%r14
|
|
movq 56(%rdx),%r15
|
|
fldcw 64(%rdx)
|
|
testq %rax,%rax
|
|
jnz 1f
|
|
incq %rax
|
|
1: movq %rcx,0(%rsp)
|
|
ret
|
|
END(_longjmp)
|