1 /* 2 * (C) Copyright 2008-2011 3 * Graeme Russ, <graeme.russ@gmail.com> 4 * 5 * (C) Copyright 2002 6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> 7 * 8 * (C) Copyright 2002 9 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> 10 * 11 * (C) Copyright 2002 12 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 13 * Marius Groeger <mgroeger@sysgo.de> 14 * 15 * See file CREDITS for list of people who contributed to this 16 * project. 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License as 20 * published by the Free Software Foundation; either version 2 of 21 * the License, or (at your option) any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 31 * MA 02111-1307 USA 32 */ 33 34 #include <common.h> 35 #include <command.h> 36 #include <malloc.h> 37 #include <asm/u-boot-x86.h> 38 39 DECLARE_GLOBAL_DATA_PTR; 40 41 unsigned long do_go_exec(ulong (*entry)(int, char * const []), 42 int argc, char * const argv[]) 43 { 44 unsigned long ret = 0; 45 char **argv_tmp; 46 47 /* 48 * x86 does not use a dedicated register to pass the pointer to 49 * the global_data, so it is instead passed as argv[-1]. By using 50 * argv[-1], the called 'Application' can use the contents of 51 * argv natively. However, to safely use argv[-1] a new copy of 52 * argv is needed with the extra element 53 */ 54 argv_tmp = malloc(sizeof(char *) * (argc + 1)); 55 56 if (argv_tmp) { 57 argv_tmp[0] = (char *)gd; 58 59 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc)); 60 61 ret = (entry) (argc, &argv_tmp[1]); 62 free(argv_tmp); 63 } 64 65 return ret; 66 } 67