1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 2d13640b7SGraeme Russ /* 3d13640b7SGraeme Russ * (C) Copyright 2008-2011 4d13640b7SGraeme Russ * Graeme Russ, <graeme.russ@gmail.com> 5d13640b7SGraeme Russ * 6d13640b7SGraeme Russ * (C) Copyright 2002 7d13640b7SGraeme Russ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> 8d13640b7SGraeme Russ * 9d13640b7SGraeme Russ * (C) Copyright 2002 10d13640b7SGraeme Russ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> 11d13640b7SGraeme Russ * 12d13640b7SGraeme Russ * (C) Copyright 2002 13d13640b7SGraeme Russ * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 14d13640b7SGraeme Russ * Marius Groeger <mgroeger@sysgo.de> 15d13640b7SGraeme Russ */ 16d13640b7SGraeme Russ 17d13640b7SGraeme Russ #include <common.h> 18d13640b7SGraeme Russ #include <command.h> 19d13640b7SGraeme Russ #include <malloc.h> 20d13640b7SGraeme Russ #include <asm/u-boot-x86.h> 21d13640b7SGraeme Russ 227282d834SSimon Glass DECLARE_GLOBAL_DATA_PTR; 237282d834SSimon Glass 24d13640b7SGraeme Russ unsigned long do_go_exec(ulong (*entry)(int, char * const []), 25d13640b7SGraeme Russ int argc, char * const argv[]) 26d13640b7SGraeme Russ { 27d13640b7SGraeme Russ unsigned long ret = 0; 28d13640b7SGraeme Russ char **argv_tmp; 29d13640b7SGraeme Russ 30d13640b7SGraeme Russ /* 31d13640b7SGraeme Russ * x86 does not use a dedicated register to pass the pointer to 32d13640b7SGraeme Russ * the global_data, so it is instead passed as argv[-1]. By using 33d13640b7SGraeme Russ * argv[-1], the called 'Application' can use the contents of 34d13640b7SGraeme Russ * argv natively. However, to safely use argv[-1] a new copy of 35d13640b7SGraeme Russ * argv is needed with the extra element 36d13640b7SGraeme Russ */ 37d13640b7SGraeme Russ argv_tmp = malloc(sizeof(char *) * (argc + 1)); 38d13640b7SGraeme Russ 39d13640b7SGraeme Russ if (argv_tmp) { 40d13640b7SGraeme Russ argv_tmp[0] = (char *)gd; 41d13640b7SGraeme Russ 42d13640b7SGraeme Russ memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc)); 43d13640b7SGraeme Russ 44d13640b7SGraeme Russ ret = (entry) (argc, &argv_tmp[1]); 45d13640b7SGraeme Russ free(argv_tmp); 46d13640b7SGraeme Russ } 47d13640b7SGraeme Russ 48d13640b7SGraeme Russ return ret; 49d13640b7SGraeme Russ } 50