80 lines
2.6 KiB
NASM
80 lines
2.6 KiB
NASM
# Copyright (C) 2001, 2004 Free Software Foundation, Inc.
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# Written By Nick Clifton
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2, or (at your option) any
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# later version.
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#
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# In addition to the permissions in the GNU General Public License, the
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# Free Software Foundation gives you unlimited permission to link the
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# compiled version of this file with other programs, and to distribute
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# those programs without any restriction coming from the use of this
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# file. (The General Public License restrictions do apply in other
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# respects; for example, they cover modification of the file, and
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# distribution when not linked into another program.)
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#
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# This file is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; see the file COPYING. If not, write to
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# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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# Boston, MA 02110-1301, USA.
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#
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# As a special exception, if you link this library with files
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# compiled with GCC to produce an executable, this does not cause
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# the resulting executable to be covered by the GNU General Public License.
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# This exception does not however invalidate any other reasons why
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# the executable file might be covered by the GNU General Public License.
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#
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# This file just makes sure that the .fini and .init sections do in
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# fact return. Users may put any desired instructions in those sections.
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# This file is the last thing linked into any executable.
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# Note - this macro is complemented by the FUNC_START macro
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# in crti.asm. If you change this macro you must also change
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# that macro match.
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#
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# Note - we do not try any fancy optimizations of the return
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# sequences here, it is just not worth it. Instead keep things
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# simple. Restore all the save resgisters, including the link
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# register and then perform the correct function return instruction.
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# We also save/restore r3 to ensure stack alignment.
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.macro FUNC_END
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#ifdef __thumb__
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.thumb
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pop {r3, r4, r5, r6, r7}
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pop {r3}
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mov lr, r3
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#else
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.arm
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sub sp, fp, #40
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ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr}
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#endif
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#if defined __THUMB_INTERWORK__ || defined __thumb__
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bx lr
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#else
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mov pc, lr
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#endif
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.endm
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.file "crtn.asm"
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.section ".init"
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;;
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FUNC_END
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.section ".fini"
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;;
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FUNC_END
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# end of crtn.asm
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