| 1 | /* |
| 2 | * patcher.c - ADAM2 patcher for Netgear DG834 (and compatible) |
| 3 | * |
| 4 | * Copyright (C) 2006 Felix Fietkau |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <stddef.h> |
| 20 | #include <unistd.h> |
| 21 | #include <fcntl.h> |
| 22 | #include <stdint.h> |
| 23 | #include <sys/mman.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <sys/ioctl.h> |
| 28 | |
| 29 | int main(int argc, char **argv) |
| 30 | { |
| 31 | int fd; |
| 32 | char *ptr; |
| 33 | uint32_t *i; |
| 34 | |
| 35 | if (argc != 2) { |
| 36 | fprintf(stderr, "Usage: %s <filename>\n", argv[0]); |
| 37 | exit(1); |
| 38 | } |
| 39 | |
| 40 | if (((fd = open(argv[1], O_RDWR)) < 0) |
| 41 | || ((ptr = mmap(0, 128 * 1024, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))) { |
| 42 | fprintf(stderr, "Can't open file\n"); |
| 43 | exit(1); |
| 44 | } |
| 45 | |
| 46 | i = (uint32_t *) &ptr[0x3944]; |
| 47 | if (*i == 0x0c000944) { |
| 48 | fprintf(stderr, "Unpatched ADAM2 detected. Patching... "); |
| 49 | *i = 0x00000000; |
| 50 | msync(i, sizeof(*i), MS_SYNC|MS_INVALIDATE); |
| 51 | fprintf(stderr, "done!\n"); |
| 52 | } else if (*i == 0x00000000) { |
| 53 | fprintf(stderr, "Patched ADAM2 detected.\n"); |
| 54 | } else { |
| 55 | fprintf(stderr, "Unknown ADAM2 detected. Can't patch!\n"); |
| 56 | } |
| 57 | |
| 58 | close(fd); |
| 59 | } |
| 60 | |
