From b34e006872e0c6c6f851ca36eda46d01e3ca0e6b Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Tue, 18 Jun 2002 01:10:28 +0000 Subject: Patch from Martin Proulx to support the i960 architecture. --- libc/sysdeps/linux/i960/crt0.S | 49 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 libc/sysdeps/linux/i960/crt0.S (limited to 'libc/sysdeps/linux/i960/crt0.S') diff --git a/libc/sysdeps/linux/i960/crt0.S b/libc/sysdeps/linux/i960/crt0.S new file mode 100644 index 000000000..b235e5c50 --- /dev/null +++ b/libc/sysdeps/linux/i960/crt0.S @@ -0,0 +1,49 @@ +# +# clone.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 */ -- cgit v1.2.3