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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/openzfs/module/lua/setjmp/setjmp_aarch64.S
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// SPDX-License-Identifier: BSD-2-Clause

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/*-

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 * Copyright (c) 2014 Andrew Turner

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 * Copyright (c) 2014-2015 The FreeBSD Foundation

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 * All rights reserved.

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 *

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 * Portions of this software were developed by Andrew Turner

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 * under sponsorship from the FreeBSD Foundation

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 *

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 */

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#ifdef __aarch64__

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#define	ENTRY(sym) \

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	.text; \

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	.globl	sym; \

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	.balign	2; \

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	.type	sym,#function; \

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sym:

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#define	END(sym) \

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	.size	sym, . - sym

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ENTRY(setjmp)

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	/* Store the stack pointer */

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	mov	x8, sp

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	str	x8, [x0], #8

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	/* Store the general purpose registers and lr */

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	stp	x19, x20, [x0], #16

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	stp	x21, x22, [x0], #16

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	stp	x23, x24, [x0], #16

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	stp	x25, x26, [x0], #16

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	stp	x27, x28, [x0], #16

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	stp	x29, x30, [x0], #16

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	/* Return value */

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	mov	x0, #0

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	ret

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END(setjmp)

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ENTRY(longjmp)

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	/* Restore the stack pointer */

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	ldr	x8, [x0], #8

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	mov	sp, x8

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	/* Restore the general purpose registers and lr */

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	ldp	x19, x20, [x0], #16

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	ldp	x21, x22, [x0], #16

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	ldp	x23, x24, [x0], #16

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	ldp	x25, x26, [x0], #16

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	ldp	x27, x28, [x0], #16

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	ldp	x29, x30, [x0], #16

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	/* Load the return value */

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	mov	x0, x1

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	ret

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END(longjmp)

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#ifdef __ELF__

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.section .note.GNU-stack,"",%progbits

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#endif

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#endif /* __aarch64__ */

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