projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ba988fc5 | 1 | /* Special .init and .fini section support for PowerPC. |
| 04277e02 | 2 | Copyright (C) 2012-2019 Free Software Foundation, Inc. |
| ba988fc5 AS |
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 | |
| c524201a PE |
33 | License along with the GNU C Library; if not, see |
| 34 | <http://www.gnu.org/licenses/>. */ | |
| ba988fc5 AS |
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 2 | |
| 60 | .globl _init | |
| 67c05796 | 61 | .hidden _init |
| ba988fc5 AS |
62 | .type _init, @function |
| 63 | _init: | |
| 64 | stwu r1, -16(r1) | |
| 65 | mflr r0 | |
| 66 | stw r0, 20(r1) | |
| 67 | stw r30, 8(r1) | |
| 68 | SETUP_GOT_ACCESS (r30, .Lgot_label_i) | |
| 69 | addis r30, r30, _GLOBAL_OFFSET_TABLE_-.Lgot_label_i@ha | |
| 70 | addi r30, r30, _GLOBAL_OFFSET_TABLE_-.Lgot_label_i@l | |
| 71 | #if PREINIT_FUNCTION_WEAK | |
| 72 | lwz r0, PREINIT_FUNCTION@got(r30) | |
| 73 | cmpwi cr7, r0, 0 | |
| 74 | beq+ cr7, 1f | |
| 75 | bl PREINIT_FUNCTION@plt | |
| 76 | 1: | |
| 77 | #else | |
| 78 | bl PREINIT_FUNCTION@local | |
| 79 | #endif | |
| 80 | ||
| 81 | .section .fini,"ax",@progbits | |
| 82 | .align 2 | |
| 83 | .globl _fini | |
| 67c05796 | 84 | .hidden _fini |
| ba988fc5 AS |
85 | .type _fini, @function |
| 86 | _fini: | |
| 87 | stwu r1, -16(r1) | |
| 88 | mflr r0 | |
| 89 | stw r0, 20(r1) | |
| 90 | stw r30, 8(r1) | |
| 91 | SETUP_GOT_ACCESS (r30, .Lgot_label_f) |