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
1021:
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_
1220:
123

source code of glibc/sysdeps/sh/crti.S