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e3b69ca7 | 1 | /* Special .init and .fini section support for 64 bit S/390. |
b168057a | 2 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
e3b69ca7 RH |
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 | <http://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 | .type _init,@function | |
63 | _init: | |
64 | stmg %r6,%r15,48(%r15) | |
65 | lgr %r1,%r15 | |
66 | aghi %r15,-160 | |
67 | stg %r1,0(%r15) | |
68 | larl %r12,_GLOBAL_OFFSET_TABLE_ | |
69 | #if PREINIT_FUNCTION_WEAK | |
70 | larl %r1,PREINIT_FUNCTION@GOTENT | |
71 | lg %r1,0(%r1) | |
72 | ltgr %r1,%r1 | |
73 | je 1f | |
74 | basr %r14,%r1 | |
75 | #else | |
76 | brasl %r14,PREINIT_FUNCTION | |
77 | #endif | |
78 | .align 4,0x07 | |
79 | 1: | |
80 | ||
81 | .section .fini,"ax",@progbits | |
82 | .align 4 | |
83 | .globl _fini | |
84 | .type _fini,@function | |
85 | _fini: | |
86 | stmg %r6,%r15,48(%r15) | |
87 | lgr %r1,%r15 | |
88 | aghi %r15,-160 | |
89 | stg %r1,0(%r15) | |
90 | larl %r12,_GLOBAL_OFFSET_TABLE_ | |
91 | .align 4,0x07 |