Differential D2132 Diff 4679 lib/libc/aarch64/gen/_setjmp.S

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lib/libc/aarch64/gen/_setjmp.S

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				/*-
				* Copyright (c) 2014 Andrew Turner
				* Copyright (c) 2014 The FreeBSD Foundation
				* All rights reserved.
				*
				* Portions of this software were developed by Andrew Turner
				* under sponsorship from the FreeBSD Foundation
				*
				* 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.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
				*
				*/

				#include <machine/asm.h>
				__FBSDID("$FreeBSD$");

				#include <machine/setjmp.h>

				ENTRY(_setjmp)
				/* Store the magic value and stack pointer */
				ldr x8, .Lmagic
				mov x9, sp
				stp x8, x9, [x0], #16

				/* Store the general purpose registers and lr */
				stp x19, x20, [x0], #16
				stp x21, x22, [x0], #16
				stp x23, x24, [x0], #16
				stp x25, x26, [x0], #16
				stp x27, x28, [x0], #16
				stp x29, lr, [x0], #16

				#ifndef _STANDALONE
				/* Store the vfp registers */
				stp d8, d9, [x0], #16
				stp d10, d11, [x0], #16
				stp d12, d13, [x0], #16
				stp d14, d15, [x0]
				#endif

				/* Return value */
				mov x0, #0
				ret
				.Lmagic:
				.align 3
				.quad _JB_MAGIC__SETJMP
				END(_setjmp)

				ENTRY(_longjmp)
				/* Check the magic value */
				ldr x8, [x0], #8
				ldr x9, .Lmagic
				cmp x8, x9
				b.ne botch

				/* Restore the stack pointer */
				ldr x8, [x0], #8
				mov sp, x8

				/* Restore the general purpose registers and lr */
				ldp x19, x20, [x0], #16
				ldp x21, x22, [x0], #16
				ldp x23, x24, [x0], #16
				ldp x25, x26, [x0], #16
				ldp x27, x28, [x0], #16
				ldp x29, lr, [x0], #16

				#ifndef _STANDALONE
				/* Restore the vfp registers */
				ldp d8, d9, [x0], #16
				ldp d10, d11, [x0], #16
				ldp d12, d13, [x0], #16
				ldp d14, d15, [x0]
				#endif

				/* Load the return value */
				mov x0, x1
				ret

				botch:
				#ifdef _STANDALONE
				b botch
				#else
				bl _C_LABEL(longjmperror)
				bl _C_LABEL(abort)
				#endif
				END(_longjmp)
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