1/* Special .init and .fini section support for 64 bit S/390.
2   Copyright (C) 2001-2021 Free Software Foundation, Inc.
3   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
4   This file is part of the GNU C Library.
5
6   The GNU C Library is free software; you can redistribute it and/or
7   modify it under the terms of the GNU Lesser General Public
8   License as published by the Free Software Foundation; either
9   version 2.1 of the License, or (at your option) any later version.
10
11   In addition to the permissions in the GNU Lesser General Public
12   License, the Free Software Foundation gives you unlimited
13   permission to link the compiled version of this file with other
14   programs, and to distribute those programs without any restriction
15   coming from the use of this file. (The GNU Lesser General Public
16   License restrictions do apply in other respects; for example, they
17   cover modification of the file, and distribution when not linked
18   into another program.)
19
20   Note that people who make modified versions of this file are not
21   obligated to grant this special exception for their modified
22   versions; it is their choice whether to do so. The GNU Lesser
23   General Public License gives permission to release a modified
24   version without this exception; this exception also makes it
25   possible to release a modified version which carries forward this
26   exception.
27
28   The GNU C Library is distributed in the hope that it will be useful,
29   but WITHOUT ANY WARRANTY; without even the implied warranty of
30   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
31   Lesser General Public License for more details.
32
33   You should have received a copy of the GNU Lesser General Public
34   License along with the GNU C Library; if not, see
35   <https://www.gnu.org/licenses/>.  */
36
37/* crti.S puts a function prologue at the beginning of the .init and
38   .fini sections and defines global symbols for those addresses, so
39   they can be called as functions.  The symbols _init and _fini are
40   magic and cause the linker to emit DT_INIT and DT_FINI.  */
41
42#include <libc-symbols.h>
43#include <sysdep.h>
44
45#ifndef PREINIT_FUNCTION
46# define PREINIT_FUNCTION __gmon_start__
47#endif
48
49#ifndef PREINIT_FUNCTION_WEAK
50# define PREINIT_FUNCTION_WEAK 1
51#endif
52
53#if PREINIT_FUNCTION_WEAK
54	weak_extern (PREINIT_FUNCTION)
55#else
56	.hidden PREINIT_FUNCTION
57#endif
58
59	.section .init,"ax",@progbits
60	.align 4
61	.globl	_init
62	.hidden	_init
63	.type	_init,@function
64_init:
65	stmg	%r6,%r15,48(%r15)
66	lgr	%r1,%r15
67	aghi	%r15,-160
68	stg	%r1,0(%r15)
69	larl	%r12,_GLOBAL_OFFSET_TABLE_
70#if PREINIT_FUNCTION_WEAK
71	larl	%r1,PREINIT_FUNCTION@GOTENT
72	lg	%r1,0(%r1)
73	ltgr	%r1,%r1
74	je	1f
75	basr	%r14,%r1
76#else
77	brasl	%r14,PREINIT_FUNCTION
78#endif
79	.align	4,0x07
801:
81
82	.section .fini,"ax",@progbits
83	.align 4
84	.globl	_fini
85	.hidden	_fini
86	.type	_fini,@function
87_fini:
88	stmg	%r6,%r15,48(%r15)
89	lgr	%r1,%r15
90	aghi	%r15,-160
91	stg	%r1,0(%r15)
92	larl	%r12,_GLOBAL_OFFSET_TABLE_
93	.align	4,0x07
94