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/*********************************************************************
*
* ISP (In-System Programming) companion tool for NXP LPC Microcontrollers
*
* This tool allows user-code computation and CRP protection check for NXP LPC
* microcontrollers.
*
*
* Copyright (C) 2012 Nathael Pajani <nathael.pajani@nathael.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*********************************************************************/
#include <stdlib.h> /* malloc, free */
#include <stdio.h>
#include <stdint.h>
#include <unistd.h> /* open, getopt, close, usleep */
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <getopt.h>
#include <termios.h> /* for serial config */
#include <ctype.h>
#include <string.h> /* strncmp, strlen, strdup */
#include "isp_utils.h"
#define PROG_NAME "LPC binary check"
#define VERSION "1.07"
void help(char *prog_name)
{
fprintf(stderr, "---------------- "PROG_NAME" --------------------------------\n");
fprintf(stderr, "Usage: %s [options] [prog file name]\n" \
" Available options:\n" \
" \t -n | --no-user-code : do not compute a valid user code for exception vector 7\n" \
" \t -s | --skip-crp-verification : do not perform CRP code verification\n" \
" \t -h | --help : display this help\n" \
" \t -v | --version : display version information\n", prog_name);
fprintf(stderr, "-----------------------------------------------------------------------\n");
}
int trace_on = 0;
static int calc_user_code = 1; /* User code is computed by default */
static int check_crp = 1; /* CRP is checked by default */
int main(int argc, char** argv)
{
char* filename = NULL;
char* data = NULL;
struct stat stat_buffer;
int size = 0;
uint32_t* v = NULL; /* Used for checksum computing */
uint32_t cksum = 0;
uint32_t crp = 0;
int ret = 0;
/* parameter parsing */
while(1) {
int option_index = 0;
int c = 0;
struct option long_options[] = {
{"no-user-code", no_argument, 0, 'n'},
{"skip-crp-verification", no_argument, 0, 's'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, "nshv", long_options, &option_index);
/* no more options to parse */
if (c == -1) break;
switch (c) {
/* n, user-code */
case 'n':
calc_user_code = 0;
break;
/* s, skip CRP verification */
case 's':
check_crp = 0;
break;
/* v, version */
case 'v':
printf("%s Version %s\n", PROG_NAME, VERSION);
return 0;
break;
/* h, help */
case 'h':
default:
help(argv[0]);
return -1;
}
}
/* Parse remaining command line arguments (not options). It should be the binary file name */
if ((optind >= argc) || ((argc - optind) != 1)) {
printf("Need one (and only one) file name to check.\n");
return -1;
}
filename = argv[optind];
/* Get information on the file */
if (stat(filename, &stat_buffer) == -1) {
perror("stat failed");
printf("Unable to get informations on file \"%s\"\n", filename);
return -2;
}
/* Allocate a buffer big enougth to get the CRP in it */
data = malloc(stat_buffer.st_size);
if (data == NULL) {
printf("Unable to get a buffer to load the image!\n");
return -2;
}
size = isp_file_to_buff(data, stat_buffer.st_size, filename);
if (size <= 0){
free(data);
return -2;
}
/* And check checksum of first 7 vectors if asked, according to section 21.3.3 of
* LPC11xx user's manual (UM10398) */
v = (uint32_t *)data;
cksum = 0 - v[0] - v[1] - v[2] - v[3] - v[4] - v[5] - v[6];
if (calc_user_code == 1) {
v[7] = cksum;
isp_buff_to_file(data, size, filename);
printf("Checksum check done. File updated.\n");
} else if (cksum != v[7]) {
printf("Checksum is 0x%08x, should be 0x%08x\n", v[7], cksum);
ret = -3;
}
if (check_crp == 1) {
crp = v[(CRP_OFFSET / 4)];
printf("CRP : 0x%08x\n", crp);
if ((crp == CRP_NO_ISP) || (crp == CRP_CRP1) || (crp == CRP_CRP2) || (crp == CRP_CRP3)) {
printf("CRP : 0x%08x\n", crp);
printf("The binary has CRP protection ativated, which violates GPLv3.\n");
printf("Check the licence for the software you are about to flash.\n");
ret = -4;
}
}
free(data);
return ret;
}
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