From d13640b7c48cfe73dd738479efb8f5ca230d87bb Mon Sep 17 00:00:00 2001 From: Graeme Russ Date: Fri, 23 Dec 2011 10:16:11 +1100 Subject: x86: Move do_go_exec() out of board.c -- Changes for v2: - None --- arch/x86/lib/cmd_boot.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 arch/x86/lib/cmd_boot.c (limited to 'arch/x86/lib/cmd_boot.c') diff --git a/arch/x86/lib/cmd_boot.c b/arch/x86/lib/cmd_boot.c new file mode 100644 index 00000000000..a81a9a38a62 --- /dev/null +++ b/arch/x86/lib/cmd_boot.c @@ -0,0 +1,64 @@ +/* + * (C) Copyright 2008-2011 + * Graeme Russ, + * + * (C) Copyright 2002 + * Daniel Engström, Omicron Ceti AB, + * + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Marius Groeger + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program 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 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include + +unsigned long do_go_exec(ulong (*entry)(int, char * const []), + int argc, char * const argv[]) +{ + unsigned long ret = 0; + char **argv_tmp; + + /* + * x86 does not use a dedicated register to pass the pointer to + * the global_data, so it is instead passed as argv[-1]. By using + * argv[-1], the called 'Application' can use the contents of + * argv natively. However, to safely use argv[-1] a new copy of + * argv is needed with the extra element + */ + argv_tmp = malloc(sizeof(char *) * (argc + 1)); + + if (argv_tmp) { + argv_tmp[0] = (char *)gd; + + memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc)); + + ret = (entry) (argc, &argv_tmp[1]); + free(argv_tmp); + } + + return ret; +} -- cgit v1.2.3