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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <fcntl.h>
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5 #include <unistd.h>
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6 #include <sys/stat.h>
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7 #include <sys/mman.h>
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8 #include <mach-o/loader.h>
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9
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10 #define NAME_MAX_LENGTH 128
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11 #define MAX_SEGMENT_NUM 128
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12
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13
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14 void option_reader(int argc, char *argv[], char *filename)
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15 {
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16 int i;
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17 for (i=0; i<argc; i++) {
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18 if(argv[i][0] == '-') {
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19 if(strcmp(argv[i], "-name")==0) {
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20 i++;
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21 strncpy(filename ,argv[i], NAME_MAX_LENGTH);
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22 printf("read %s\n", filename);
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23 }
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24 } else {
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25 strncpy(filename ,argv[i], NAME_MAX_LENGTH);
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26 }
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27 }
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28 }
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29
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30 int main(int argc, char*argv[])
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31 {
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32 char filename[NAME_MAX_LENGTH];
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33 option_reader(argc, argv, filename);
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34
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35 int fp;
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36 if ((fp = open(filename, O_RDONLY)) < 0) {
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37 fprintf(stderr, "can not open file\t: %s\n", filename);
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38 exit(1);
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39 }
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40
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41 struct stat sb;
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42 fstat(fp, &sb);
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43
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44 char *head = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fp, 0);
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45
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46 struct mach_header_64 *mh64 = (struct mach_header_64 *)head;
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47
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48 if (MH_MAGIC_64 != mh64->magic) {
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49 fprintf(stderr, "This is not mach header 64.\n");
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50 return 0;
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51 }
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52
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53 printf("%s is 64bit Mach-O file.\n", filename);
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54
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55 if (MH_EXECUTE != mh64->filetype) {
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56 fprintf(stderr, "This is not executable file.\n");
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57 return 0;
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58 }
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59
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60 printf("%s is executable file.\n", filename);
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61
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62 if (CPU_TYPE_X86_64 == mh64->cputype) printf("CPU : x86_64\n");
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63
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64 int i = 0;
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65 int mh64_size = sizeof(struct mach_header_64);
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66 int lc_size = sizeof(struct load_command);
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67 for (;i < mh64->ncmds; i++) {
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68 struct load_command * lc = (struct load_command*)head + lc_size * i;
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69 }
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70
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71 close(fp);
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72
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73 return 0;
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74 }
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