50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2008-2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <asm/u-boot-x86.h>
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DECLARE_GLOBAL_DATA_PTR;
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unsigned long do_go_exec(ulong (*entry)(int, char * const []),
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int argc, char * const argv[])
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{
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unsigned long ret = 0;
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char **argv_tmp;
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/*
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* x86 does not use a dedicated register to pass the pointer to
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* the global_data, so it is instead passed as argv[-1]. By using
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* argv[-1], the called 'Application' can use the contents of
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* argv natively. However, to safely use argv[-1] a new copy of
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* argv is needed with the extra element
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*/
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argv_tmp = malloc(sizeof(char *) * (argc + 1));
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if (argv_tmp) {
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argv_tmp[0] = (char *)gd;
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memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
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ret = (entry) (argc, &argv_tmp[1]);
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free(argv_tmp);
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}
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return ret;
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}
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