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| Commit | Line | Data |
|---|---|---|
| 4cd0bc3b | 1 | # Define _init and _fini entry points for C-SKY. |
| 8d9254fc | 2 | # Copyright (C) 2018-2020 Free Software Foundation, Inc. |
| 4cd0bc3b J |
3 | # Contributed by C-SKY Microsystems and Mentor Graphics. |
| 4 | # | |
| 5 | # This file is free software; you can redistribute it and/or modify it | |
| 6 | # under the terms of the GNU General Public License as published by the | |
| 7 | # Free Software Foundation; either version 3, or (at your option) any | |
| 8 | # later version. | |
| 9 | # | |
| 10 | # This file is distributed in the hope that it will be useful, but | |
| 11 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | # General Public License for more details. | |
| 14 | # | |
| 15 | # Under Section 7 of GPL version 3, you are granted additional | |
| 16 | # permissions described in the GCC Runtime Library Exception, version | |
| 17 | # 3.1, as published by the Free Software Foundation. | |
| 18 | # | |
| 19 | # You should have received a copy of the GNU General Public License and | |
| 20 | # a copy of the GCC Runtime Library Exception along with this program; | |
| 21 | # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 22 | # <http://www.gnu.org/licenses/>. | |
| 23 | ||
| 24 | ||
| 25 | # This file just makes a stack frame for the contents of the .fini and | |
| 26 | # .init sections. Users may put any desired instructions in those | |
| 27 | # sections. | |
| 28 | ||
| 29 | .file "crti.S" | |
| 30 | ||
| 31 | /* We use more complicated versions of this code with GLIBC. */ | |
| 32 | #if defined(__gnu_linux__) | |
| 33 | ||
| 34 | #ifndef PREINIT_FUNCTION | |
| 35 | # define PREINIT_FUNCTION __gmon_start__ | |
| 36 | #endif | |
| 37 | ||
| 38 | #ifndef PREINIT_FUNCTION_WEAK | |
| 39 | # define PREINIT_FUNCTION_WEAK 1 | |
| 40 | #endif | |
| 41 | ||
| 42 | #if PREINIT_FUNCTION_WEAK | |
| 43 | .global PREINIT_FUNCTION | |
| 44 | .weak PREINIT_FUNCTION | |
| 45 | .align 4 | |
| 46 | .type call_weak_fn, %function | |
| 47 | call_weak_fn: | |
| 48 | // push lr | |
| 49 | subi sp, 4 | |
| 50 | stw lr, (sp) | |
| 51 | #ifdef __PIC__ | |
| 52 | lrw a2, PREINIT_FUNCTION@GOT | |
| 53 | addu a2, gb | |
| 54 | ldw a2, (a2) | |
| 55 | #else | |
| 56 | lrw a2, PREINIT_FUNCTION | |
| 57 | #endif | |
| 58 | cmpnei a2, 0 | |
| 59 | bf 1f | |
| 60 | jsr a2 | |
| 61 | 1: | |
| 62 | // pop lr | |
| 63 | ldw lr, (sp) | |
| 64 | addi sp, 4 | |
| 65 | rts | |
| 66 | ||
| 67 | .align 4 | |
| 68 | #else | |
| 69 | .hidden PREINIT_FUNCTION | |
| 70 | #endif /* PREINIT_FUNCTION_WEAK */ | |
| 71 | ||
| 72 | .section .init,"ax",@progbits | |
| 73 | .align 4 | |
| 74 | .globl _init | |
| 75 | .type _init, @function | |
| 76 | _init: | |
| 77 | subi sp, 8 | |
| 78 | stw lr, (sp, 0) | |
| 79 | #ifdef __PIC__ | |
| 80 | // stw gb, (sp, 4) | |
| 81 | bsr .Lgetpc | |
| 82 | .Lgetpc: | |
| 83 | lrw gb, .Lgetpc@GOTPC | |
| 84 | add gb, lr | |
| 85 | #endif | |
| 86 | #if PREINIT_FUNCTION_WEAK | |
| 87 | #ifdef __PIC__ | |
| 88 | lrw a2, call_weak_fn@GOTOFF | |
| 89 | add a2, gb | |
| 90 | jsr a2 | |
| 91 | #else | |
| 92 | jsri call_weak_fn | |
| 93 | #endif | |
| 94 | #else /* !PREINIT_FUNCTION_WEAK */ | |
| 95 | #ifdef __PIC__ | |
| 96 | lrw a2, PREINIT_FUNCTION@PLT | |
| 97 | addu a2, gb | |
| 98 | ldw a2, (a2) | |
| 99 | jsr a2 | |
| 100 | #else | |
| 101 | jsri PREINIT_FUNCTION | |
| 102 | #endif | |
| 103 | #endif /* PREINIT_FUNCTION_WEAK */ | |
| 104 | ||
| 105 | br 2f | |
| 106 | .literals | |
| 107 | .align 4 | |
| 108 | 2: | |
| 109 | .section .fini,"ax",@progbits | |
| 110 | .align 4 | |
| 111 | .globl _fini | |
| 112 | .type _fini, @function | |
| 113 | _fini: | |
| 114 | subi sp,8 | |
| 115 | stw lr, (sp, 0) | |
| 116 | br 2f | |
| 117 | .literals | |
| 118 | .align 4 | |
| 119 | 2: | |
| 120 | ||
| 121 | /* These are the non-GLIBC versions. */ | |
| 122 | #else /* !defined(__gnu_linux__) */ | |
| 123 | .section ".init" | |
| 124 | .global _init | |
| 125 | .type _init,@function | |
| 126 | .align 2 | |
| 127 | _init: | |
| 128 | subi sp, 16 | |
| 129 | st.w lr, (sp, 12) | |
| 130 | mov r0, r0 | |
| 131 | ||
| 132 | .section ".fini" | |
| 133 | .global _fini | |
| 134 | .type _fini,@function | |
| 135 | .align 2 | |
| 136 | _fini: | |
| 137 | subi sp, 16 | |
| 138 | st.w lr, (sp, 12) | |
| 139 | mov r0, r0 | |
| 140 | #endif /* defined(__gnu_linux__) */ |