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e3b69ca7 | 1 | /* Special .init and .fini section support for S/390. |
04277e02 | 2 | Copyright (C) 2000-2019 Free Software Foundation, Inc. |
e3b69ca7 RH |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | In addition to the permissions in the GNU Lesser General Public | |
11 | License, the Free Software Foundation gives you unlimited | |
12 | permission to link the compiled version of this file with other | |
13 | programs, and to distribute those programs without any restriction | |
14 | coming from the use of this file. (The GNU Lesser General Public | |
15 | License restrictions do apply in other respects; for example, they | |
16 | cover modification of the file, and distribution when not linked | |
17 | into another program.) | |
18 | ||
19 | Note that people who make modified versions of this file are not | |
20 | obligated to grant this special exception for their modified | |
21 | versions; it is their choice whether to do so. The GNU Lesser | |
22 | General Public License gives permission to release a modified | |
23 | version without this exception; this exception also makes it | |
24 | possible to release a modified version which carries forward this | |
25 | exception. | |
26 | ||
27 | The GNU C Library is distributed in the hope that it will be useful, | |
28 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
30 | Lesser General Public License for more details. | |
31 | ||
32 | You should have received a copy of the GNU Lesser General Public | |
33 | License along with the GNU C Library; if not, see | |
5a82c748 | 34 | <https://www.gnu.org/licenses/>. */ |
e3b69ca7 RH |
35 | |
36 | /* crti.S puts a function prologue at the beginning of the .init and | |
37 | .fini sections and defines global symbols for those addresses, so | |
38 | they can be called as functions. The symbols _init and _fini are | |
39 | magic and cause the linker to emit DT_INIT and DT_FINI. */ | |
40 | ||
41 | #include <libc-symbols.h> | |
42 | #include <sysdep.h> | |
43 | ||
44 | #ifndef PREINIT_FUNCTION | |
45 | # define PREINIT_FUNCTION __gmon_start__ | |
46 | #endif | |
47 | ||
48 | #ifndef PREINIT_FUNCTION_WEAK | |
49 | # define PREINIT_FUNCTION_WEAK 1 | |
50 | #endif | |
51 | ||
52 | #if PREINIT_FUNCTION_WEAK | |
53 | weak_extern (PREINIT_FUNCTION) | |
54 | #else | |
55 | .hidden PREINIT_FUNCTION | |
56 | #endif | |
57 | ||
58 | .section .init,"ax",@progbits | |
59 | .globl _init | |
67c05796 | 60 | .hidden _init |
e3b69ca7 RH |
61 | .type _init,@function |
62 | .align 4 | |
63 | _init: | |
64 | stm %r6,%r15,24(%r15) | |
65 | bras %r13,1f | |
66 | 0: | |
67 | #if PREINIT_FUNCTION_WEAK | |
68 | .long PREINIT_FUNCTION@GOT | |
69 | #else | |
70 | .long PREINIT_FUNCTION-0b | |
71 | #endif | |
72 | .long _GLOBAL_OFFSET_TABLE_-0b | |
73 | 1: lr %r1,%r15 | |
74 | ahi %r15,-96 | |
75 | st %r1,0(%r15) | |
76 | l %r12,4(%r13) | |
77 | ar %r12,%r13 | |
78 | l %r1,0(%r13) | |
79 | #if PREINIT_FUNCTION_WEAK | |
80 | l %r1,0(%r1,%r12) | |
81 | ltr %r1,%r1 | |
82 | je 2f | |
83 | #else | |
84 | la %r1,0(%r1,%r13) | |
85 | #endif | |
86 | basr %r14,%r1 | |
87 | .align 4,0x07 | |
88 | 2: | |
89 | ||
90 | .section .fini,"ax",@progbits | |
91 | .globl _fini | |
67c05796 | 92 | .hidden _fini |
e3b69ca7 RH |
93 | .type _fini,@function |
94 | .align 4 | |
95 | _fini: | |
96 | stm %r6,%r15,24(%r15) | |
97 | bras %r13,1f | |
98 | 0: .long _GLOBAL_OFFSET_TABLE_-0b | |
99 | 1: lr %r1,%r15 | |
100 | ahi %r15,-96 | |
101 | st %r1,0(%r15) | |
102 | l %r12,0(%r13) | |
103 | ar %r12,%r13 | |
104 | .align 4,0x07 |