1 | /* Special .init and .fini section support for SH. |
2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
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 |
34 | <https://www.gnu.org/licenses/>. */ |
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 | .align 5 |
60 | .global _init |
61 | .hidden _init |
62 | .type _init, @function |
63 | _init: |
64 | mov.l r12,@-r15 |
65 | mova .L12,r0 |
66 | mov.l .L12,r12 |
67 | mov.l r14,@-r15 |
68 | add r0,r12 |
69 | sts.l pr,@-r15 |
70 | #if PREINIT_FUNCTION_WEAK |
71 | mov.l .L13,r0 |
72 | mov.l @(r0,r12),r1 |
73 | tst r1,r1 |
74 | bt/s .L8 |
75 | mov r15,r14 |
76 | mov.l .L14,r1 |
77 | bsrf r1 |
78 | .LPCS0: |
79 | nop |
80 | .L8: |
81 | #else |
82 | mova .L13,r0 |
83 | mov.l .L13,r1 |
84 | add r0,r1 |
85 | jsr @r1 |
86 | mov r15,r14 |
87 | #endif |
88 | bra 1f |
89 | nop |
90 | .align 2 |
91 | .L12: |
92 | .long _GLOBAL_OFFSET_TABLE_ |
93 | #if PREINIT_FUNCTION_WEAK |
94 | .L13: |
95 | .long PREINIT_FUNCTION@GOT |
96 | .L14: |
97 | .long PREINIT_FUNCTION@PLT-(.LPCS0+2-(.)) |
98 | #else |
99 | .L13: |
100 | .long PREINIT_FUNCTION@PLT |
101 | #endif |
102 | 1: |
103 | |
104 | .section .fini,"ax" ,@progbits |
105 | .align 5 |
106 | .global _fini |
107 | .hidden _fini |
108 | .type _fini, @function |
109 | _fini: |
110 | mov.l r12,@-r15 |
111 | mova .L19,r0 |
112 | mov.l r14,@-r15 |
113 | sts.l pr,@-r15 |
114 | mov.l .L19,r12 |
115 | mov r15,r14 |
116 | add r0,r12 |
117 | bra 0f |
118 | nop |
119 | .align 2 |
120 | .L19: |
121 | .long _GLOBAL_OFFSET_TABLE_ |
122 | 0: |
123 | |