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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rdoff.h"
#include "multboot.h"
FILE *infile;
long translatelong(long in) { /* translate from little endian to
local representation */
long r;
unsigned char *i;
i = (unsigned char *)∈
r = i[3];
r = (r << 8) + i[2];
r = (r << 8) + i[1];
r = (r << 8) + *i;
return r;
}
int16 translateshort(int16 in) {
int r;
unsigned char *i;
i = (unsigned char *)∈
r = (i[1] << 8) + *i;
return r;
}
void print_header(long length, int rdf_version) {
char buf[129],t,s,l,flags;
unsigned char reclen;
long o,ll;
int16 rs;
struct tMultiBootHeader *mb;
while (length > 0) {
fread(&t,1,1,infile);
if (rdf_version >= 2) {
fread(&reclen,1,1,infile);
}
switch(t) {
case 1: /* relocation record */
case 6: /* segment relocation */
fread(&s,1,1,infile);
fread(&o,4,1,infile);
fread(&l,1,1,infile);
fread(&rs,2,1,infile);
printf(" %s: location (%04x:%08lx), length %d, "
"referred seg %04x\n", t == 1 ? "relocation" : "seg relocation",
(int)s,translatelong(o),(int)l,
translateshort(rs));
if (rdf_version >= 2 && reclen != 8)
printf(" warning: reclen != 8\n");
if (rdf_version == 1) length -= 9;
if (rdf_version == 1 && t == 6)
printf(" warning: seg relocation not supported in RDOFF1\n");
break;
case 2: /* import record */
case 7: /* import far symbol */
fread(&rs,2,1,infile);
ll = 0;
if (rdf_version == 1) {
do {
fread(&buf[ll],1,1,infile);
} while (buf[ll++]);
}
else
{
for (;ll < reclen - 2; ll++)
fread(&buf[ll],1,1,infile);
}
printf(" %simport: segment %04x = %s\n",t == 7 ? "far " : "",
translateshort(rs),buf);
if (rdf_version == 1) length -= ll + 3;
if (rdf_version == 1 && t == 7)
printf (" warning: far import not supported in RDOFF1\n");
break;
case 3: /* export record */
fread(&flags,1,1,infile);
fread(&s,1,1,infile);
fread(&o,4,1,infile);
ll = 0;
if (rdf_version == 1) {
do {
fread(&buf[ll],1,1,infile);
} while (buf[ll++]);
}
else
{
for (; ll < reclen - 6; ll ++)
fread(&buf[ll],1,1,infile);
}
if (flags & SYM_GLOBAL)
printf(" export");
else
printf(" global");
if (flags & SYM_FUNCTION) printf(" proc");
if (flags & SYM_DATA) printf(" data");
printf(": (%04x:%08lx) = %s\n",(int)s,translatelong(o),buf);
if (rdf_version == 1) length -= ll + 6;
break;
case 4: /* DLL and Module records */
case 8:
ll = 0;
if (rdf_version == 1) {
do {
fread(&buf[ll],1,1,infile);
} while (buf[ll++]);
}
else
{
for (; ll < reclen; ll++)
fread(&buf[ll],1,1,infile);
}
if (t==4) printf(" dll: %s\n",buf);
else printf(" module: %s\n",buf);
if (rdf_version == 1) length -= ll + 1;
break;
case 5: /* BSS reservation */
fread(&ll,4,1,infile);
printf(" bss reservation: %08lx bytes\n",translatelong(ll));
if (rdf_version == 1) length -= 5;
if (rdf_version > 1 && reclen != 4)
printf(" warning: reclen != 4\n");
break;
case 9: /* MultiBoot header record */
fread(buf,reclen,1,infile);
mb = (struct tMultiBootHeader *)buf;
printf(" multiboot header: load address=0x%X, size=0x%X, entry=0x%X\n",
mb->LoadAddr, mb->LoadEndAddr - mb->LoadAddr, mb->Entry);
break;
default:
printf(" unrecognised record (type %d",(int)t);
if (rdf_version > 1) {
printf(", length %d",(int)reclen);
fseek(infile,reclen,SEEK_CUR);
}
printf(")\n");
if (rdf_version == 1) length --;
}
if (rdf_version != 1) length -= 2 + reclen;
}
}
char * knowntypes[8] = {"NULL", "text", "data", "object comment",
"linked comment", "loader comment",
"symbolic debug", "line number debug"};
char * translatesegmenttype(int16 type) {
if (type < 8) return knowntypes[type];
if (type < 0x0020) return "reserved";
if (type < 0x1000) return "reserved - moscow";
if (type < 0x8000) return "reserved - system dependant";
if (type < 0xFFFF) return "reserved - other";
if (type == 0xFFFF) return "invalid type code";
return "type code out of range";
}
int main(int argc,char **argv) {
char id[7];
long l;
int16 s;
int verbose = 0;
long offset;
int foundnullsegment = 0;
int version;
long segmentcontentlength = 0;
int nsegments = 0;
long headerlength = 0;
long objectlength = 0;
puts("RDOFF Dump utility v2.1\n(c) Copyright 1996,99,2000 Julian R Hall, Yuri M Zaporogets");
if (argc < 2) {
fputs("Usage: rdfdump [-v] <filename>\n",stderr);
exit(1);
}
if (! strcmp (argv[1], "-v") )
{
verbose = 1;
if (argc < 3)
{
fputs("required parameter missing\n",stderr);
exit(1);
}
argv++;
}
infile = fopen(argv[1],"rb");
if (! infile) {
fprintf(stderr,"rdfdump: Could not open %s\n",argv[1]);
exit(1);
}
fread(id,6,1,infile);
if (strncmp(id,"RDOFF",5)) {
fputs("rdfdump: File does not contain valid RDOFF header\n",stderr);
exit(1);
}
printf("File %s: RDOFF version %c\n\n",argv[1],id[5]);
if (id[5] < '1' || id[5] > '2') {
fprintf(stderr,"rdfdump: unknown RDOFF version '%c'\n",id[5]);
exit(1);
}
version = id[5] - '0';
if (version > 1) {
fread(&l, 4, 1, infile);
objectlength = translatelong(l);
printf("Object content size: %ld bytes\n", objectlength);
}
fread(&l,4,1,infile);
headerlength = translatelong(l);
printf("Header (%ld bytes):\n",headerlength);
print_header(headerlength, version);
if (version == 1) {
fread(&l,4,1,infile);
l = translatelong(l);
printf("\nText segment length = %ld bytes\n",l);
offset = 0;
while(l--) {
fread(id,1,1,infile);
if (verbose) {
if (offset % 16 == 0)
printf("\n%08lx ", offset);
printf(" %02x",(int) (unsigned char)id[0]);
offset++;
}
}
if (verbose) printf("\n\n");
fread(&l,4,1,infile);
l = translatelong(l);
printf("Data segment length = %ld bytes\n",l);
if (verbose)
{
offset = 0;
while (l--) {
fread(id,1,1,infile);
if (offset % 16 == 0)
printf("\n%08lx ", offset);
printf(" %02x",(int) (unsigned char) id[0]);
offset++;
}
printf("\n");
}
}
else
{
do {
fread(&s,2,1,infile);
s = translateshort(s);
if (!s) {
printf("\nNULL segment\n");
foundnullsegment = 1;
break;
}
printf("\nSegment:\n Type = %04X (%s)\n",(int)s,
translatesegmenttype(s));
nsegments++;
fread(&s,2,1,infile);
printf(" Number = %04X\n",(int)translateshort(s));
fread(&s,2,1,infile);
printf(" Resrvd = %04X\n",(int)translateshort(s));
fread(&l,4,1,infile);
l = translatelong(l);
printf(" Length = %ld bytes\n",l);
segmentcontentlength += l;
offset = 0;
while(l--) {
fread(id,1,1,infile);
if (verbose) {
if (offset % 16 == 0)
printf("\n%08lx ", offset);
printf(" %02x",(int) (unsigned char)id[0]);
offset++;
}
}
if (verbose) printf("\n");
} while (!feof(infile));
if (! foundnullsegment)
printf("\nWarning: unexpected end of file - "
"NULL segment not found\n");
printf("\nTotal number of segments: %d\n", nsegments);
printf("Total segment content length: %ld bytes\n",segmentcontentlength);
/* calculate what the total object content length should have been */
l = segmentcontentlength + 10 * (nsegments+1) + headerlength + 4;
if (l != objectlength)
printf("Warning: actual object length (%ld) != "
"stored object length (%ld)\n", l, objectlength);
}
fclose(infile);
return 0;
}
|
