Subversion Repositories openrisc

#   Copyright (C) 2001, 2004 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 2, or (at your option) any

# later version.

#

# In addition to the permissions in the GNU General Public License, the

# Free Software Foundation gives you unlimited permission to link the

# compiled version of this file with other programs, and to distribute

# those programs without any restriction coming from the use of this

# file.  (The General Public License restrictions do apply in other

# respects; for example, they cover modification of the file, and

# distribution when not linked into another program.)

#

# 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.

#

# You should have received a copy of the GNU General Public License

# along with this program; see the file COPYING.  If not, write to

# the Free Software Foundation, 51 Franklin Street, Fifth Floor,

# Boston, MA 02110-1301, USA.

#

#    As a special exception, if you link this library with files

#    compiled with GCC to produce an executable, this does not cause

#    the resulting executable to be covered by the GNU General Public License.

#    This exception does not however invalidate any other reasons why

#    the executable file might be covered by the GNU General Public License.

#

# 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.asm.  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

        .file           "crtn.asm"

        .section        ".init"

        ;;

        FUNC_END

        .section        ".fini"

        ;;

        FUNC_END

# end of crtn.asm