u-boot/arch/x86/lib/cmd_boot.c
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

51 lines
1.2 KiB
C

/*
* (C) Copyright 2008-2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <asm/u-boot-x86.h>
DECLARE_GLOBAL_DATA_PTR;
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;
}