FreeCalypso > hg > freecalypso-reveng
view miscprog/memwrite-grep.c @ 206:11761eaf712c
old Calypso F741979B boot ROM analyzed
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Wed, 30 Dec 2015 08:27:46 +0000 |
parents | 8bdc87c0fc03 |
children |
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/* * This utility performs a memmem() binary "grep", checking to see if a given * binary file (firmware image) contains the $l1tm_mem_write implementation * code found in our TCS211 objects and in that one C11x fw version for which * we have the map file. */ #define _GNU_SOURCE #include <sys/types.h> #include <sys/file.h> #include <sys/stat.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <unistd.h> u_char needle[50] = { 0x30, 0xb5, 0x45, 0x68, 0x42, 0x78, 0x04, 0x3a, 0x12, 0x06, 0x13, 0x0e, 0x00, 0x2b, 0x09, 0xd0, 0x00, 0x22, 0x14, 0x18, 0x24, 0x7a, 0x54, 0x55, 0x52, 0x1c, 0x12, 0x04, 0x12, 0x0c, 0x01, 0x3b, 0x00, 0x2b, 0xf6, 0xd1, 0x00, 0x20, 0x88, 0x80, 0x00, 0x06, 0x00, 0x0e, 0x48, 0x70, 0x88, 0x70, 0x30, 0xbd }; u_char *haystack; size_t haystack_size; read_file(filename) char *filename; { int fd; struct stat st; fd = open(filename, O_RDONLY); if (fd < 0) { perror(filename); exit(1); } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { fprintf(stderr, "error: %s is not a regular file\n", filename); exit(1); } haystack_size = st.st_size; haystack = malloc(haystack_size); if (!haystack) { fprintf(stderr, "unable to malloc buffer for %s\n", filename); exit(1); } read(fd, haystack, haystack_size); close(fd); } main(argc, argv) char **argv; { u_char *result; if (argc != 2) { fprintf(stderr, "usage: %s firmware.bin\n", argv[0]); exit(1); } read_file(argv[1]); result = memmem(haystack, haystack_size, needle, sizeof needle); if (result) printf("Found the needle bytes at offset 0x%x\n", result - haystack); else printf("Needle bytes not found in this image\n"); exit(0); }