| /* |
| * Extended Boot Option ROM |
| * |
| * 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 2 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, write to the Free Software |
| * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * |
| * Copyright IBM Corporation, 2007 |
| * Authors: Anthony Liguori <aliguori@us.ibm.com> |
| */ |
| |
| #include <stdio.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| int main(int argc, char **argv) |
| { |
| FILE *fin, *fout; |
| char buffer[512], oldbuffer[512]; |
| int i, size, lag = 0; |
| uint8_t sum = 0; |
| |
| if (argc != 3) { |
| printf("Usage: %s ROM OUTPUT\n", argv[0]); |
| return 1; |
| } |
| |
| fin = fopen(argv[1], "rb"); |
| fout = fopen(argv[2], "wb"); |
| |
| if (fin == NULL || fout == NULL) { |
| fprintf(stderr, "Could not open input/output files\n"); |
| return 1; |
| } |
| |
| do { |
| size = fread(buffer, 512, 1, fin); |
| if (size == 1) { |
| for (i = 0; i < 512; i++) |
| sum += buffer[i]; |
| |
| if (lag) { |
| if (fwrite(oldbuffer, 512, 1, fout) != 1) { |
| fprintf(stderr, "Write failed\n"); |
| return 1; |
| } |
| } |
| lag = 1; |
| memcpy(oldbuffer, buffer, 512); |
| } |
| } while (size == 1); |
| |
| if (size != 0) { |
| fprintf(stderr, "Failed to read from input file\n"); |
| return 1; |
| } |
| |
| oldbuffer[511] = -sum; |
| |
| if (fwrite(oldbuffer, 512, 1, fout) != 1) { |
| fprintf(stderr, "Failed to write to output file\n"); |
| return 1; |
| } |
| |
| fclose(fin); |
| fclose(fout); |
| |
| return 0; |
| } |