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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/csu/aarch64/crt1_s.S
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/* LINTLIBRARY */

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/*-

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 * Copyright 1996-1998 John D. Polstra.

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 * Copyright 2014 Andrew Turner.

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 * Copyright 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 ``AS IS'' AND ANY EXPRESS OR

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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 */

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#include <machine/asm.h>

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#include <sys/elf_common.h>

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	/*

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	 * The program entry point

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	 * void _start(char **ap, void (*cleanup)(void)) __dead2

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	 */

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ENTRY(_start)

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	.cfi_undefined x30

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	mov	x3, x2		/* cleanup */

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	add	x1, x0, #8	/* load argv */

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	ldr	x0, [x0]	/* load argc */

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	add	x2, x1, x0, lsl #3 /* env is after argv */

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	add	x2, x2, #8	/* argv is null terminated */

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#ifdef PIC

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	adrp	x4, :got:main

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	ldr	x4, [x4, :got_lo12:main]

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#else

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	ldr	x4, =main

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#endif

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#ifdef GCRT

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	ldr	x5, =eprol

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	ldr	x6, =etext

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	/*

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	 * __libc_start1_gcrt(argc, argv, env, cleanup, main, &eprol, &etext)

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	 */

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	bl	__libc_start1_gcrt

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eprol:

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#else

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	/* __libc_start1(argc, argv, env, cleanup, main) */

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	bl	__libc_start1

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#endif

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END(_start)

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

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GNU_PROPERTY_AARCH64_FEATURE_1_NOTE(GNU_PROPERTY_AARCH64_FEATURE_1_VAL)

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