1/* Special .init and .fini section support for 64 bit S/390. 2 Copyright (C) 2001-2021 Free Software Foundation, Inc. 3 Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 In addition to the permissions in the GNU Lesser General Public 12 License, the Free Software Foundation gives you unlimited 13 permission to link the compiled version of this file with other 14 programs, and to distribute those programs without any restriction 15 coming from the use of this file. (The GNU Lesser General Public 16 License restrictions do apply in other respects; for example, they 17 cover modification of the file, and distribution when not linked 18 into another program.) 19 20 Note that people who make modified versions of this file are not 21 obligated to grant this special exception for their modified 22 versions; it is their choice whether to do so. The GNU Lesser 23 General Public License gives permission to release a modified 24 version without this exception; this exception also makes it 25 possible to release a modified version which carries forward this 26 exception. 27 28 The GNU C Library is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 Lesser General Public License for more details. 32 33 You should have received a copy of the GNU Lesser General Public 34 License along with the GNU C Library; if not, see 35 <https://www.gnu.org/licenses/>. */ 36 37/* crti.S puts a function prologue at the beginning of the .init and 38 .fini sections and defines global symbols for those addresses, so 39 they can be called as functions. The symbols _init and _fini are 40 magic and cause the linker to emit DT_INIT and DT_FINI. */ 41 42#include <libc-symbols.h> 43#include <sysdep.h> 44 45#ifndef PREINIT_FUNCTION 46# define PREINIT_FUNCTION __gmon_start__ 47#endif 48 49#ifndef PREINIT_FUNCTION_WEAK 50# define PREINIT_FUNCTION_WEAK 1 51#endif 52 53#if PREINIT_FUNCTION_WEAK 54 weak_extern (PREINIT_FUNCTION) 55#else 56 .hidden PREINIT_FUNCTION 57#endif 58 59 .section .init,"ax",@progbits 60 .align 4 61 .globl _init 62 .hidden _init 63 .type _init,@function 64_init: 65 stmg %r6,%r15,48(%r15) 66 lgr %r1,%r15 67 aghi %r15,-160 68 stg %r1,0(%r15) 69 larl %r12,_GLOBAL_OFFSET_TABLE_ 70#if PREINIT_FUNCTION_WEAK 71 larl %r1,PREINIT_FUNCTION@GOTENT 72 lg %r1,0(%r1) 73 ltgr %r1,%r1 74 je 1f 75 basr %r14,%r1 76#else 77 brasl %r14,PREINIT_FUNCTION 78#endif 79 .align 4,0x07 801: 81 82 .section .fini,"ax",@progbits 83 .align 4 84 .globl _fini 85 .hidden _fini 86 .type _fini,@function 87_fini: 88 stmg %r6,%r15,48(%r15) 89 lgr %r1,%r15 90 aghi %r15,-160 91 stg %r1,0(%r15) 92 larl %r12,_GLOBAL_OFFSET_TABLE_ 93 .align 4,0x07 94