xref: /freebsd/lib/csu/aarch64/crt1_s.S (revision 7ef62cebc2f965b0f640263e179276928885e33d)
1/* LINTLIBRARY */
2/*-
3 * Copyright 1996-1998 John D. Polstra.
4 * Copyright 2014 Andrew Turner.
5 * Copyright 2014-2015 The FreeBSD Foundation.
6 * All rights reserved.
7 *
8 * Portions of this software were developed by Andrew Turner
9 * under sponsorship from the FreeBSD Foundation.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <machine/asm.h>
33__FBSDID("$FreeBSD$");
34
35	/*
36	 * The program entry point
37	 * void _start(char **ap, void (*cleanup)(void)) __dead2
38	 */
39ENTRY(_start)
40	.cfi_undefined x30
41	mov	x3, x2		/* cleanup */
42	add	x1, x0, #8	/* load argv */
43	ldr	x0, [x0]	/* load argc */
44	add	x2, x1, x0, lsl #3 /* env is after argv */
45	add	x2, x2, #8	/* argv is null terminated */
46#ifdef PIC
47	adrp	x4, main
48	add	x4, x4, :lo12:main
49#else
50	ldr	x4, =main
51#endif
52#ifdef GCRT
53	ldr	x5, =eprol
54	ldr	x6, =etext
55	/*
56	 * __libc_start1_gcrt(argc, argv, env, cleanup, main, &eprol, &etext)
57	 */
58	bl	__libc_start1_gcrt
59eprol:
60#else
61	/* __libc_start1(argc, argv, env, cleanup, main) */
62	bl	__libc_start1
63#endif
64END(_start)
65
66	.section .note.GNU-stack,"",@progbits
67