141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/**
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* \file
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* File loader implementation.
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* \author Adam Dunkels <adam@dunkels.com>
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*
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* This file implements dynamically loadable files for Contiki using
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* the cc65 module loading system. The actual file operations are
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* implemented in other files.
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*/
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/*
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* Copyright (c) 2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki desktop OS
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*
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* $Id: loader-arch.c,v 1.1 2006/06/17 22:41:26 adamdunkels Exp $
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*
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*/
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#include <stdlib.h>
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#include <modload.h>
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#include "cfs/cfs.h"
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#include "sys/loader.h"
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#include "loader-arch.h"
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static int __fastcall__
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do_read(int f, char *buf, unsigned int len)
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{
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return cfs_read(f, buf, len);
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}
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struct mod_ctrl ctrl = {
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(void *)do_read /* Read from disk */
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};
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struct loader_arch_hdr {
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char arch[8];
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char version[8];
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char initfunc[1];
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};
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/*-----------------------------------------------------------------------------------*/
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/**
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* Load a program from disk and execute it.
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*
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* Code originally written by Ullrich von Bassewitz.
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*/
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/*-----------------------------------------------------------------------------------*/
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unsigned char
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load(const char *name)
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{
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unsigned char res;
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/* Now open the file */
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ctrl.callerdata = cfs_open(name, 0);
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if(ctrl.callerdata < 0) {
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/* Could not open the file, display an error and return */
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/* ### */
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return LOADER_ERR_OPEN;
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}
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/* Load the module */
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res = mod_load(&ctrl);
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/* Close the input file */
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cfs_close(ctrl.callerdata);
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/* Check the return code */
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if(res != MLOAD_OK) {
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/* Wrong module, out of memory or whatever. Print an error
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* message and return.
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*/
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/* ### */
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return res;
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}
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/* We've successfully loaded the module. */
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return LOADER_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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/**
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* Load and start a program.
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*
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* \param name The name of the program file.
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* \param arg A pointer that will be passed to the new process.
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*/
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/*-----------------------------------------------------------------------------------*/
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unsigned char
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loader_arch_load(const char *name, char *arg)
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{
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unsigned char r;
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struct loader_arch_hdr *hdr;
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r = load(name);
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if(r != MLOAD_OK) {
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return r;
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}
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hdr = (struct loader_arch_hdr *)ctrl.module;
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/* Check the program header and see that version and architecture
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matches. */
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/* Call the init function. */
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((void (*)(char *))hdr->initfunc)(arg);
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return LOADER_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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