exec.c

来自「SMDK2440 boot code, base on vivi」· C语言 代码 · 共 62 行

/*
 * vivi/lib/exec.c: Execute a binary.
 *
 * Copyright (C) 2002 MIZI Research, Inc.
 *
 * Author: Janghoon Lyu <[e-mail]>
 *
 * $Date: 2003/08/12 11:14:14 $
 * $Revision: 1.1 $
 *
 * $Id: exec.c,v 1.1 2003/08/12 11:14:14 nandy Exp $
 *
 */

#include <command.h>
#include <memory.h>
#include <vstring.h>
#include <types.h>

static void call(unsigned long addr, long a0, long a1, long a2, long a3)
{
	printk("Jump to 0x%08lx. a0=0x%08lx, a1=0x%08lx, a2=0x%08lx, a3=0x%08lx\n\n", addr, a0, a1, a2, a3);

	__asm__(
		"mov	r0, %0\n"
		"mov	r1, %1\n"
		"mov	r2, %2\n"
		"mov	r3, %3\n"
		"mov	pc, %4\n"
	: 
	: "r" (a0), "r" (a1), "r" (a2), "r" (a3), "r" (addr)
	);
}

void command_call(int argc, const char **argv)
{
	int i;
	long a[4] = { 0, };
	unsigned long addr;

	if (argc == 1) {
		addr = (unsigned long)(RAM_BASE + 0x8000);
	} else {
		addr = simple_strtoul(argv[1], NULL, 0);
	}

	i = 2;
	for (i = 2; argv[i] == NULL; i++) {
		a[i-2] = (long)simple_strtoul(argv[i], NULL, 0);
	}

	call(addr, a[0], a[1], a[2], a[3]);

	return;
}

user_command_t call_cmd = {
	"call",
	command_call,
	NULL
};