/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-â
âvi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/macros.internal.h"

//	Saves cpu state.
//
//	@param	rdi points to jmp_buf
//	@return	rax 0 when set and !0 when longjmp'd
//	@returnstwice
//	@assume	system five nexgen32e abi conformant
//	@note	code built w/ microsoft abi compiler can't call this
//	@see	longjmp(), _gclongjmp()
setjmp:
#ifdef __x86_64__
	lea	8(%rsp),%rax
	mov	%rax,(%rdi)
	mov	%rbx,8(%rdi)
	mov	%rbp,16(%rdi)
	mov	%r12,24(%rdi)
	mov	%r13,32(%rdi)
	mov	%r14,40(%rdi)
	mov	%r15,48(%rdi)
	mov	(%rsp),%rax
	mov	%rax,56(%rdi)
	xor	%eax,%eax
#elif defined(__aarch64__)
	stp	x19,x20,[x0,#0]
	stp	x21,x22,[x0,#16]
	stp	x23,x24,[x0,#32]
	stp	x25,x26,[x0,#48]
	stp	x27,x28,[x0,#64]
	stp	x29,x30,[x0,#80]
	mov	x2,sp
	str	x2,[x0,#104]
	stp	d8,d9,[x0,#112]
	stp	d10,d11,[x0,#128]
	stp	d12,d13,[x0,#144]
	stp	d14,d15,[x0,#160]
	mov	x0,#0
#endif
	ret
	.endfn	setjmp,globl
	.alias	setjmp,_setjmp
