1# Machine description for AArch64 architecture.
2# Copyright (C) 2009-2015 Free Software Foundation, Inc.
3# Contributed by ARM Ltd.
4#
5# This file is free software; you can redistribute it and/or modify it
6# under the terms of the GNU General Public License as published by the
7# Free Software Foundation; either version 3, or (at your option) any
8# later version.
9#
10# This file is distributed in the hope that it will be useful, but
11# WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13# General Public License for more details.
14#
15# Under Section 7 of GPL version 3, you are granted additional
16# permissions described in the GCC Runtime Library Exception, version
17# 3.1, as published by the Free Software Foundation.
18#
19# You should have received a copy of the GNU General Public License and
20# a copy of the GCC Runtime Library Exception along with this program;
21# see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
22# <http://www.gnu.org/licenses/>.
23
24/* An executable stack is *not* required for these functions.  */
25#if defined(__ELF__) && defined(__linux__)
26.section .note.GNU-stack,"",%progbits
27.previous
28#endif
29
30# This file creates a stack frame for the contents of the .fini and
31# .init sections.  Users may put any desired instructions in those
32# sections.
33
34#ifdef __ELF__
35#define TYPE(x) .type x,function
36#else
37#define TYPE(x)
38#endif
39
40	# Note - this macro is complemented by the FUNC_END macro
41	# in crtn.S.  If you change this macro you must also change
42	# that macro match.
43.macro FUNC_START
44	#  Create a stack frame and save any call-preserved registers
45	stp	x29, x30, [sp, #-16]!
46	stp	x27, x28, [sp, #-16]!
47	stp	x25, x26, [sp, #-16]!
48	stp	x23, x24, [sp, #-16]!
49	stp	x21, x22, [sp, #-16]!
50	stp	x19, x20, [sp, #-16]!
51.endm
52
53	.section	".init"
54	.align 2
55	.global	_init
56	TYPE(_init)
57_init:
58	FUNC_START
59
60
61	.section	".fini"
62	.align	2
63	.global	_fini
64	TYPE(_fini)
65_fini:
66	FUNC_START
67
68# end of crti.S
69