1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <stdio.h>
#include <filehdr.h>
#include <aouthdr.h>
#include <scnhdr.h>
/* COFF -- Examine the header of a COFF file.
*/
main (argc, argv)
int argc;
char *argv[];
{
struct filehdr fh;
struct aouthdr sh;
struct scnhdr nh;
int fd;
if (argc < 2) {
fprintf (stderr, "Usage: coff <filename>\n");
exit (0);
}
if ((fd = open (argv[1], 0)) == -1) {
fprintf (stderr, "cannot open %s\n", argv[1]);
exit (1);
}
/* Show file header. */
if (read (fd, &fh, sizeof(fh)) != sizeof(fh))
goto readerr;
else if (!ISCOFF(fh.f_magic)) {
fprintf (stderr, "not a COFF format file\n");
/* exit (2); */
}
printf ("File header:\n");
printf ("%16s: %10d %10x %012o\n",
"f_magic", fh.f_magic, fh.f_magic, fh.f_magic);
printf ("%16s: %10d %10x %012o\n",
"f_nscns", fh.f_nscns, fh.f_nscns, fh.f_nscns);
printf ("%16s: %10d %10x %012o\n",
"f_timdat", fh.f_timdat, fh.f_timdat, fh.f_timdat);
printf ("%16s: %10d %10x %012o\n",
"f_symptr", fh.f_symptr, fh.f_symptr, fh.f_symptr);
printf ("%16s: %10d %10x %012o\n",
"f_nsyms", fh.f_nsyms, fh.f_nsyms, fh.f_nsyms);
printf ("%16s: %10d %10x %012o\n",
"f_opthdr", fh.f_opthdr, fh.f_opthdr, fh.f_opthdr);
printf ("%16s: %10d %10x %012o\n",
"f_flags", fh.f_flags, fh.f_flags, fh.f_flags);
/* Show system header. */
if (read (fd, &sh, sizeof(sh)) != sizeof(sh))
goto readerr;
else if (sh.magic != 0413) {
fprintf (stderr, "bad magic %o in system header\n", sh.magic);
exit (3);
}
printf ("System header:\n");
printf ("%16s: %10d %10x %012o\n",
"magic", sh.magic, sh.magic, sh.magic);
printf ("%16s: %10d %10x %012o\n",
"vstamp", sh.vstamp, sh.vstamp, sh.vstamp);
printf ("%16s: %10d %10x %012o\n",
"tsize", sh.tsize, sh.tsize, sh.tsize);
printf ("%16s: %10d %10x %012o\n",
"dsize", sh.dsize, sh.dsize, sh.dsize);
printf ("%16s: %10d %10x %012o\n",
"bsize", sh.bsize, sh.bsize, sh.bsize);
printf ("%16s: %10d %10x %012o\n",
"entry", sh.entry, sh.entry, sh.entry);
printf ("%16s: %10d %10x %012o\n",
"text_start", sh.text_start, sh.text_start, sh.text_start);
printf ("%16s: %10d %10x %012o\n",
"data_start", sh.data_start, sh.data_start, sh.data_start);
fflush (stdout);
close (fd);
exit (0);
readerr:
fprintf (stderr, "file read error\n");
exit (4);
}
|
