# Copyright (C) 2001, 2004, 2008, 2009, 2010, 2011 # Free Software Foundation, Inc. # Written By Nick Clifton # # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; either version 3, or (at your option) any # later version. # # This file is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # Under Section 7 of GPL version 3, you are granted additional # permissions described in the GCC Runtime Library Exception, version # 3.1, as published by the Free Software Foundation. # # You should have received a copy of the GNU General Public License and # a copy of the GCC Runtime Library Exception along with this program; # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see # . /* An executable stack is *not* required for these functions. */ #if defined(__ELF__) && defined(__linux__) .section .note.GNU-stack,"",%progbits .previous #endif #ifdef __ARM_EABI__ /* Some attributes that are common to all routines in this file. */ /* Tag_ABI_align_needed: This code does not require 8-byte alignment from the caller. */ /* .eabi_attribute 24, 0 -- default setting. */ /* Tag_ABI_align_preserved: This code preserves 8-byte alignment in any callee. */ .eabi_attribute 25, 1 #endif /* __ARM_EABI__ */ # This file just makes sure that the .fini and .init sections do in # fact return. Users may put any desired instructions in those sections. # This file is the last thing linked into any executable. # Note - this macro is complemented by the FUNC_START macro # in crti.S. If you change this macro you must also change # that macro match. # # Note - we do not try any fancy optimizations of the return # sequences here, it is just not worth it. Instead keep things # simple. Restore all the save resgisters, including the link # register and then perform the correct function return instruction. # We also save/restore r3 to ensure stack alignment. .macro FUNC_END #ifdef __thumb__ .thumb pop {r3, r4, r5, r6, r7} pop {r3} mov lr, r3 #else .arm sub sp, fp, #40 ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr} #endif #if defined __THUMB_INTERWORK__ || defined __thumb__ bx lr #else mov pc, lr #endif .endm .section ".init" ;; FUNC_END .section ".fini" ;; FUNC_END # end of crtn.S