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/* firmware/extract.c - tool for extracting firmwares out of linux
* binary drivers
*
* --------------------------------------------------------------------
*
* Copyright (C) 2003 ACX100 Open Source Project
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License version 2 (the "GPL"), in which
* case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use
* your version of this file under the MPL, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the ACX100 Open Source Project can be
* made directly to:
*
* acx100-users@lists.sf.net
* http://acx100.sf.net
*
* --------------------------------------------------------------------
*/
/* TODO:
* - get the firmware size from the debug symbols in the binary
* - check for version string, not only 4 first bytes
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#define FRMWR_SIZE 29612
#define NR_COLS 10
int main(int argc, char *argv[])
{
FILE *driver;
unsigned char c;
int size, pos, file_size;
unsigned char *mem, *begin;
/* this is the signature for firmware version 1.5.0 which is present in all the linux binary drivers. */
unsigned char signature[] = {0x58, 0xb2, 0x24, 0x00};
/* check the arguments */
if (argc != 2)
{
fprintf(stderr, "Wrong call arguments.\n");
fprintf(stderr, "USAGE: extract binary_driver.o\n");
fprintf(stderr, " The firmware will be extracted, and will be written to stdout.\n");
exit(1);
}
/* try to open the file */
driver = fopen(argv[1], "r");
if(!driver)
{
fprintf(stderr, "ERROR: couldn't open or find given binary file %s to extract firmware image from it, aborting!\n", argv[1]);
exit(1);
}
/* get file stats */
fseek(driver, 0, SEEK_END);
file_size = ftell(driver);
fseek(driver, 0, SEEK_SET);
/* alloc buffer to hold complete file */
mem = malloc(file_size);
if(!mem)
{
fprintf(stderr, "Could not allocate enough memory\n");
exit(1);
}
/* read the complete file */
size = fread(mem, 1, file_size, driver);
if ( size != file_size)
{
fprintf(stderr, "Was unable to read complete file (%i, %i)\n", size, file_size);
exit(1);
}
/* find the firmware */
begin = memmem(mem, file_size, signature, 4);
if(!begin)
{
fprintf(stderr, "Firmware was not found\n");
exit(1);
}
/* start processing the firmware */
pos = 0;
do {
c = begin[pos];
printf("%c", c);
pos++;
} while(pos != FRMWR_SIZE);
free(driver);
exit(0);
}
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