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#
# crt0.S, part of the i960 support for the uClibc library.
#
# Copyright (C) 2002 by Okiok Data Ltd. http://www.okiok.com/
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU Library General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option) any
# later version.
#
# This program 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 Library General Public License for more
# details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software Foundation, Inc.,
# at 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
/*
*
* The behavior in this file is tightly coupled with how the linux kernel sets things up
* on the stack before calling us.
*
* Currently fs/binfmt_flat.c (for STACK_GROWS_UP) and arch/i960/kernel/process.c
* build things so that a pointer to argc is left in g13 by start_thread().
*
* ^
* | <- sp somewhere around here, after being aligned.
* |
* |envp -> envp[0]
* |argv -> argv[0]
* |argc <- g13
*
* A complete picture of how things are set up can be seen in the comments of
* create_flat_tables_stack_grows_up in fs/binfmt_flat.c
*
* I believe having to use this register could probably be avoided.
*
*/
.globl start
start:
mov g13, r3
ldt (r3), g0
callx ___uClibc_main
/* We might want to add some instruction so that it crashes if main returns */
/* Define a symbol for the first piece of initialized data. */
.data
.globl __data_start
__data_start:
.long 0
.weak data_start
data_start = __data_start
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