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25a368f2 | 1 | /* Special .init and .fini section support for MIPS (n32). |
d614a753 | 2 | Copyright (C) 1995-2020 Free Software Foundation, Inc. |
25a368f2 JM |
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 | |
ab84e3ff | 33 | License along with the GNU C Library. If not, see |
5a82c748 | 34 | <https://www.gnu.org/licenses/>. */ |
25a368f2 JM |
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 | ||
f7f7931e MR |
43 | #ifdef __mips_micromips |
44 | # define JALR_RELOC R_MICROMIPS_JALR | |
45 | #else | |
46 | # define JALR_RELOC R_MIPS_JALR | |
47 | #endif | |
48 | ||
25a368f2 JM |
49 | #ifndef PREINIT_FUNCTION |
50 | # define PREINIT_FUNCTION __gmon_start__ | |
51 | #endif | |
52 | ||
53 | #ifndef PREINIT_FUNCTION_WEAK | |
54 | # define PREINIT_FUNCTION_WEAK 1 | |
55 | #endif | |
56 | ||
57 | #if PREINIT_FUNCTION_WEAK | |
58 | weak_extern (PREINIT_FUNCTION) | |
59 | #else | |
60 | .hidden PREINIT_FUNCTION | |
61 | #endif | |
62 | ||
43301bd3 MR |
63 | .set nomips16 |
64 | ||
25a368f2 JM |
65 | .section .init,"ax",@progbits |
66 | .p2align 2 | |
67 | .globl _init | |
67c05796 | 68 | .hidden _init |
25a368f2 JM |
69 | .type _init, @function |
70 | _init: | |
71 | addiu $sp,$sp,-16 | |
72 | sd $28,0($sp) | |
73 | lui $28,%hi(%neg(%gp_rel(_init))) | |
74 | addu $28,$28,$25 | |
75 | sd $31,8($sp) | |
76 | addiu $28,$28,%lo(%neg(%gp_rel(_init))) | |
77 | #if PREINIT_FUNCTION_WEAK | |
78 | lw $2,%got_disp(PREINIT_FUNCTION)($28) | |
79 | beq $2,$0,.Lno_weak_fn | |
80 | lw $25,%call16(PREINIT_FUNCTION)($28) | |
f7f7931e | 81 | .reloc 1f,JALR_RELOC,PREINIT_FUNCTION |
25a368f2 JM |
82 | 1: jalr $25 |
83 | .Lno_weak_fn: | |
cfaf1949 | 84 | .insn |
25a368f2 JM |
85 | #else |
86 | lw $25,%got_disp(PREINIT_FUNCTION)($28) | |
f7f7931e | 87 | .reloc 1f,JALR_RELOC,PREINIT_FUNCTION |
25a368f2 JM |
88 | 1: jalr $25 |
89 | #endif | |
90 | ||
91 | .section .fini,"ax",@progbits | |
92 | .p2align 2 | |
93 | .globl _fini | |
67c05796 | 94 | .hidden _fini |
25a368f2 JM |
95 | .type _fini, @function |
96 | _fini: | |
97 | addiu $sp,$sp,-16 | |
98 | sd $28,0($sp) | |
99 | lui $28,%hi(%neg(%gp_rel(_fini))) | |
100 | addu $28,$28,$25 | |
101 | sd $31,8($sp) | |
102 | addiu $28,$28,%lo(%neg(%gp_rel(_fini))) |