OpenWrt – Blame information for rev 4
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Rev | Author | Line No. | Line |
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4 | office | 1 | /* |
2 | * patcher.c - ADAM2 patcher for Netgear DG834 (and compatible) |
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3 | * |
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4 | * Copyright (C) 2006 Felix Fietkau |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU General Public License |
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8 | * as published by the Free Software Foundation; either version 2 |
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9 | * of the License, or (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | */ |
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16 | |||
17 | #include <stdio.h> |
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18 | #include <stdlib.h> |
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19 | #include <stddef.h> |
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20 | #include <unistd.h> |
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21 | #include <fcntl.h> |
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22 | #include <stdint.h> |
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23 | #include <sys/mman.h> |
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24 | #include <sys/stat.h> |
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25 | #include <string.h> |
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26 | |||
27 | #include <sys/ioctl.h> |
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28 | |||
29 | int main(int argc, char **argv) |
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30 | { |
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31 | int fd; |
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32 | char *ptr; |
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33 | uint32_t *i; |
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34 | |||
35 | if (argc != 2) { |
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36 | fprintf(stderr, "Usage: %s <filename>\n", argv[0]); |
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37 | exit(1); |
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38 | } |
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39 | |||
40 | if (((fd = open(argv[1], O_RDWR)) < 0) |
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41 | || ((ptr = mmap(0, 128 * 1024, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))) { |
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42 | fprintf(stderr, "Can't open file\n"); |
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43 | exit(1); |
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44 | } |
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45 | |||
46 | i = (uint32_t *) &ptr[0x3944]; |
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47 | if (*i == 0x0c000944) { |
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48 | fprintf(stderr, "Unpatched ADAM2 detected. Patching... "); |
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49 | *i = 0x00000000; |
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50 | msync(i, sizeof(*i), MS_SYNC|MS_INVALIDATE); |
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51 | fprintf(stderr, "done!\n"); |
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52 | } else if (*i == 0x00000000) { |
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53 | fprintf(stderr, "Patched ADAM2 detected.\n"); |
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54 | } else { |
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55 | fprintf(stderr, "Unknown ADAM2 detected. Can't patch!\n"); |
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56 | } |
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57 | |||
58 | close(fd); |
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59 | } |