1/* Special .init and .fini section support for MicroBlaze. 2 Copyright (C) 2012-2022 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 2 60 .globl _init 61 .hidden _init 62 .type _init, @function 63_init: 64 addik r1,r1,-32 65 swi r20,r1,28 66 mfs r20,rpc 67 addik r20,r20,_GLOBAL_OFFSET_TABLE_+8 68 lwi r3,r20,PREINIT_FUNCTION@GOT 69#if PREINIT_FUNCTION_WEAK 70 beqid r3,$Lno_weak_fn: 71 swi r15,r1,0 72 brlid r15,PREINIT_FUNCTION@PLT 73$Lno_weak_fn: 74#else 75 swi r15,r1,0 76 brald r15,r3 77#endif 78 nop # Unfilled delay slot 79 80 .section .fini,"ax",@progbits 81 .align 2 82 .globl _fini 83 .hidden _fini 84 .type _fini, @function 85_fini: 86 addik r1,r1,-32 87 swi r20,r1,28 88 swi r15,r1,0 89 mfs r20,rpc 90 addik r20,r20,_GLOBAL_OFFSET_TABLE_+8 91