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60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* patcher.c - ADAM2 patcher for Netgear DG834 (and compatible)
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*
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* Copyright (C) 2006 Felix Fietkau
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <sys/ioctl.h>
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int main(int argc, char **argv)
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{
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int fd;
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char *ptr;
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uint32_t *i;
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if (argc != 2) {
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fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
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exit(1);
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}
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if (((fd = open(argv[1], O_RDWR)) < 0)
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|| ((ptr = mmap(0, 128 * 1024, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))) {
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fprintf(stderr, "Can't open file\n");
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exit(1);
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}
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i = (uint32_t *) &ptr[0x3944];
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if (*i == 0x0c000944) {
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fprintf(stderr, "Unpatched ADAM2 detected. Patching... ");
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*i = 0x00000000;
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msync(i, sizeof(*i), MS_SYNC|MS_INVALIDATE);
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fprintf(stderr, "done!\n");
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} else if (*i == 0x00000000) {
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fprintf(stderr, "Patched ADAM2 detected.\n");
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} else {
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fprintf(stderr, "Unknown ADAM2 detected. Can't patch!\n");
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}
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close(fd);
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}
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