crti.S revision 1.6
1# Machine description for AArch64 architecture. 2# Copyright (C) 2009-2017 Free Software Foundation, Inc. 3# Contributed by ARM Ltd. 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/* An executable stack is *not* required for these functions. */ 25#if defined(__ELF__) && defined(__linux__) 26.section .note.GNU-stack,"",%progbits 27.previous 28#endif 29 30# This file creates a stack frame for the contents of the .fini and 31# .init sections. Users may put any desired instructions in those 32# sections. 33 34#ifdef __ELF__ 35#define TYPE(x) .type x,function 36#else 37#define TYPE(x) 38#endif 39 40 # Note - this macro is complemented by the FUNC_END macro 41 # in crtn.S. If you change this macro you must also change 42 # that macro match. 43.macro FUNC_START 44 # Create a stack frame and save any call-preserved registers 45 stp x29, x30, [sp, #-16]! 46 stp x27, x28, [sp, #-16]! 47 stp x25, x26, [sp, #-16]! 48 stp x23, x24, [sp, #-16]! 49 stp x21, x22, [sp, #-16]! 50 stp x19, x20, [sp, #-16]! 51.endm 52 53 .section ".init" 54 .align 2 55 .global _init 56 TYPE(_init) 57_init: 58 FUNC_START 59 60 61 .section ".fini" 62 .align 2 63 .global _fini 64 TYPE(_fini) 65_fini: 66 FUNC_START 67 68# end of crti.S 69