1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2008-2011
3*4882a593Smuzhiyun * Graeme Russ, <graeme.russ@gmail.com>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (C) Copyright 2002
6*4882a593Smuzhiyun * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * (C) Copyright 2002
9*4882a593Smuzhiyun * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * (C) Copyright 2002
12*4882a593Smuzhiyun * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13*4882a593Smuzhiyun * Marius Groeger <mgroeger@sysgo.de>
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
16*4882a593Smuzhiyun */
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include <common.h>
19*4882a593Smuzhiyun #include <command.h>
20*4882a593Smuzhiyun #include <malloc.h>
21*4882a593Smuzhiyun #include <asm/u-boot-x86.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
24*4882a593Smuzhiyun
do_go_exec(ulong (* entry)(int,char * const[]),int argc,char * const argv[])25*4882a593Smuzhiyun unsigned long do_go_exec(ulong (*entry)(int, char * const []),
26*4882a593Smuzhiyun int argc, char * const argv[])
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun unsigned long ret = 0;
29*4882a593Smuzhiyun char **argv_tmp;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun /*
32*4882a593Smuzhiyun * x86 does not use a dedicated register to pass the pointer to
33*4882a593Smuzhiyun * the global_data, so it is instead passed as argv[-1]. By using
34*4882a593Smuzhiyun * argv[-1], the called 'Application' can use the contents of
35*4882a593Smuzhiyun * argv natively. However, to safely use argv[-1] a new copy of
36*4882a593Smuzhiyun * argv is needed with the extra element
37*4882a593Smuzhiyun */
38*4882a593Smuzhiyun argv_tmp = malloc(sizeof(char *) * (argc + 1));
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (argv_tmp) {
41*4882a593Smuzhiyun argv_tmp[0] = (char *)gd;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun ret = (entry) (argc, &argv_tmp[1]);
46*4882a593Smuzhiyun free(argv_tmp);
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun return ret;
50*4882a593Smuzhiyun }
51