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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v)" from
* the last call to
* _setjmp(a)
* by restoring registers from the stack,
* The previous signal state is NOT restored.
*
*/
#include <mach/machine/asm.h>
ENTRY(_setjmp)
movq %rbx,0(%rdi)
movq %rbp,8(%rdi) /* save frame pointer of caller */
movq %r12,16(%rdi)
movq %r13,24(%rdi)
movq %r14,32(%rdi)
movq %r15,40(%rdi)
popq %rdx
movq %rsp,48(%rdi) /* save stack pointer of caller */
movq %rdx,56(%rdi) /* save pc of caller */
xorq %rax,%rax
jmp *%rdx
ENTRY(_longjmp)
movq %rsi,%rax /* return(v) */
movq 0(%rdi),%rbx
movq 8(%rdi),%rbp
movq 16(%rdi),%r12
movq 24(%rdi),%r13
movq 32(%rdi),%r14
movq 40(%rdi),%r15
movq 48(%rdi),%rsp
orq %rax,%rax
jnz 0f
incq %rax
0: jmp *56(%rdi) /* done, return.... */
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