rdoff/rdfdump.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "rdoff.h"
   6 #include "multboot.h"
   7
   8 FILE *infile;
   9
  10 long translatelong(long in) {           /* translate from little endian to
  11                                            local representation */
  12   long r;
  13   unsigned char *i;
  14
  15   i = (unsigned char *)&in;
  16   r = i[3];
  17   r = (r << 8) + i[2];
  18   r = (r << 8) + i[1];
  19   r = (r << 8) + *i;
  20
  21   return r;
  22 }
  23
  24 int16 translateshort(int16 in) {
  25   int r;
  26   unsigned char *i;
  27
  28   i = (unsigned char *)&in;
  29   r = (i[1] << 8) + *i;
  30
  31   return r;
  32 }
  33
  34 void print_header(long length, int rdf_version) {
  35   char buf[129],t,s,l,flags;
  36   unsigned char reclen;
  37   long o,ll;
  38   int16 rs;
  39   struct tMultiBootHeader *mb;
  40
  41   while (length > 0) {
  42     fread(&t,1,1,infile);
  43     if (rdf_version >= 2) {
  44         fread(&reclen,1,1,infile);
  45     }
  46     switch(t) {
  47
  48     case 1:             /* relocation record */
  49     case 6:             /* segment relocation */
  50       fread(&s,1,1,infile);
  51       fread(&o,4,1,infile);
  52       fread(&l,1,1,infile);
  53       fread(&rs,2,1,infile);
  54       printf("  %s: location (%04x:%08lx), length %d, "
  55              "referred seg %04x\n", t == 1 ? "relocation" : "seg relocation",
  56              (int)s,translatelong(o),(int)l,
  57              translateshort(rs));
  58       if (rdf_version >= 2 && reclen != 8)
  59           printf("    warning: reclen != 8\n");
  60       if (rdf_version == 1) length -= 9;
  61       if (rdf_version == 1 && t == 6)
  62           printf("    warning: seg relocation not supported in RDOFF1\n");
  63       break;
  64
  65     case 2:             /* import record */
  66     case 7:             /* import far symbol */
  67       fread(&rs,2,1,infile);
  68       ll = 0;
  69
  70       if (rdf_version == 1) {
  71           do {
  72               fread(&buf[ll],1,1,infile);
  73           } while (buf[ll++]);
  74       }
  75       else
  76       {
  77           for (;ll < reclen - 2; ll++)
  78               fread(&buf[ll],1,1,infile);
  79       }
  80
  81       printf("  %simport: segment %04x = %s\n",t == 7 ? "far " : "",
  82              translateshort(rs),buf);
  83       if (rdf_version == 1) length -= ll + 3;
  84       if (rdf_version == 1 && t == 7)
  85           printf ("    warning: far import not supported in RDOFF1\n");
  86       break;
  87
  88     case 3:             /* export record */
  89       fread(&flags,1,1,infile);
  90       fread(&s,1,1,infile);
  91       fread(&o,4,1,infile);
  92       ll = 0;
  93
  94       if (rdf_version == 1) {
  95           do {
  96               fread(&buf[ll],1,1,infile);
  97           } while (buf[ll++]);
  98       }
  99       else
 100       {
 101           for (; ll < reclen - 6; ll ++)
 102               fread(&buf[ll],1,1,infile);
 103       }
 104       if (flags & SYM_GLOBAL)
 105         printf("  export");
 106       else
 107         printf("  global");
 108       if (flags & SYM_FUNCTION) printf(" proc");
 109       if (flags & SYM_DATA) printf(" data");
 110       printf(": (%04x:%08lx) = %s\n",(int)s,translatelong(o),buf);
 111       if (rdf_version == 1) length -= ll + 6;
 112       break;
 113
 114     case 4:             /* DLL and Module records */
 115     case 8:
 116       ll = 0;
 117
 118       if (rdf_version == 1) {
 119           do {
 120               fread(&buf[ll],1,1,infile);
 121           } while (buf[ll++]);
 122       }
 123       else
 124       {
 125           for (; ll < reclen; ll++)
 126               fread(&buf[ll],1,1,infile);
 127       }
 128       if (t==4) printf("  dll: %s\n",buf);
 129       else printf("  module: %s\n",buf);
 130       if (rdf_version == 1) length -= ll + 1;
 131       break;
 132     case 5:             /* BSS reservation */
 133       fread(&ll,4,1,infile);
 134       printf("  bss reservation: %08lx bytes\n",translatelong(ll));
 135       if (rdf_version == 1) length -= 5;
 136       if (rdf_version > 1 && reclen != 4)
 137           printf("    warning: reclen != 4\n");
 138       break;
 139
 140     case 9:             /* MultiBoot header record */
 141       fread(buf,reclen,1,infile);
 142       mb = (struct tMultiBootHeader *)buf;
 143       printf("  multiboot header: load address=0x%X, size=0x%X, entry=0x%X\n",
 144              mb->LoadAddr, mb->LoadEndAddr - mb->LoadAddr, mb->Entry);
 145       break;
 146     default:
 147       printf("  unrecognised record (type %d",(int)t);
 148       if (rdf_version > 1) {
 149         printf(", length %d",(int)reclen);
 150         fseek(infile,reclen,SEEK_CUR);
 151       }
 152       printf(")\n");
 153       if (rdf_version == 1) length --;
 154     }
 155     if (rdf_version != 1) length -= 2 + reclen;
 156   }
 157 }
 158
 159 char * knowntypes[8] = {"NULL", "text", "data", "object comment",
 160                         "linked comment", "loader comment",
 161                         "symbolic debug", "line number debug"};
 162
 163 char * translatesegmenttype(int16 type) {
 164     if (type < 8) return knowntypes[type];
 165     if (type < 0x0020) return "reserved";
 166     if (type < 0x1000) return "reserved - moscow";
 167     if (type < 0x8000) return "reserved - system dependant";
 168     if (type < 0xFFFF) return "reserved - other";
 169     if (type == 0xFFFF) return "invalid type code";
 170     return "type code out of range";
 171 }
 172
 173 int main(int argc,char **argv) {
 174   char id[7];
 175   long l;
 176   int16 s;
 177   int verbose = 0;
 178   long offset;
 179   int  foundnullsegment = 0;
 180   int  version;
 181   long segmentcontentlength = 0;
 182   int  nsegments = 0;
 183   long headerlength = 0;
 184   long objectlength = 0;
 185
 186   puts("RDOFF Dump utility v2.1\n(c) Copyright 1996,99,2000 Julian R Hall, Yuri M Zaporogets");
 187
 188   if (argc < 2) {
 189     fputs("Usage: rdfdump [-v] <filename>\n",stderr);
 190     exit(1);
 191   }
 192
 193   if (! strcmp (argv[1], "-v") )
 194   {
 195     verbose = 1;
 196     if (argc < 3)
 197     {
 198       fputs("required parameter missing\n",stderr);
 199       exit(1);
 200     }
 201     argv++;
 202   }
 203
 204   infile = fopen(argv[1],"rb");
 205   if (! infile) {
 206     fprintf(stderr,"rdfdump: Could not open %s\n",argv[1]);
 207     exit(1);
 208   }
 209
 210   fread(id,6,1,infile);
 211   if (strncmp(id,"RDOFF",5)) {
 212     fputs("rdfdump: File does not contain valid RDOFF header\n",stderr);
 213     exit(1);
 214   }
 215
 216   printf("File %s: RDOFF version %c\n\n",argv[1],id[5]);
 217   if (id[5] < '1' || id[5] > '2') {
 218     fprintf(stderr,"rdfdump: unknown RDOFF version '%c'\n",id[5]);
 219     exit(1);
 220   }
 221   version = id[5] - '0';
 222
 223   if (version > 1) {
 224       fread(&l, 4, 1, infile);
 225       objectlength = translatelong(l);
 226       printf("Object content size: %ld bytes\n", objectlength);
 227   }
 228
 229   fread(&l,4,1,infile);
 230   headerlength = translatelong(l);
 231   printf("Header (%ld bytes):\n",headerlength);
 232   print_header(headerlength, version);
 233
 234   if (version == 1) {
 235       fread(&l,4,1,infile);
 236       l = translatelong(l);
 237       printf("\nText segment length = %ld bytes\n",l);
 238       offset = 0;
 239       while(l--) {
 240           fread(id,1,1,infile);
 241           if (verbose) {
 242               if (offset % 16 == 0)
 243                   printf("\n%08lx ", offset);
 244               printf(" %02x",(int) (unsigned char)id[0]);
 245               offset++;
 246           }
 247       }
 248       if (verbose) printf("\n\n");
 249
 250       fread(&l,4,1,infile);
 251       l = translatelong(l);
 252       printf("Data segment length = %ld bytes\n",l);
 253
 254       if (verbose)
 255       {
 256           offset = 0;
 257           while (l--) {
 258               fread(id,1,1,infile);
 259               if (offset % 16 == 0)
 260                   printf("\n%08lx ", offset);
 261               printf(" %02x",(int) (unsigned char) id[0]);
 262               offset++;
 263           }
 264           printf("\n");
 265       }
 266   }
 267   else
 268   {
 269       do {
 270           fread(&s,2,1,infile);
 271           s = translateshort(s);
 272           if (!s) {
 273               printf("\nNULL segment\n");
 274               foundnullsegment = 1;
 275               break;
 276           }
 277           printf("\nSegment:\n  Type   = %04X (%s)\n",(int)s,
 278                  translatesegmenttype(s));
 279           nsegments++;
 280
 281           fread(&s,2,1,infile);
 282           printf("  Number = %04X\n",(int)translateshort(s));
 283           fread(&s,2,1,infile);
 284           printf("  Resrvd = %04X\n",(int)translateshort(s));
 285           fread(&l,4,1,infile);
 286           l = translatelong(l);
 287           printf("  Length = %ld bytes\n",l);
 288           segmentcontentlength += l;
 289
 290           offset = 0;
 291           while(l--) {
 292               fread(id,1,1,infile);
 293               if (verbose) {
 294                   if (offset % 16 == 0)
 295                       printf("\n%08lx ", offset);
 296                   printf(" %02x",(int) (unsigned char)id[0]);
 297                   offset++;
 298               }
 299           }
 300           if (verbose) printf("\n");
 301       } while (!feof(infile));
 302       if (! foundnullsegment)
 303           printf("\nWarning: unexpected end of file - "
 304                  "NULL segment not found\n");
 305
 306       printf("\nTotal number of segments: %d\n", nsegments);
 307       printf("Total segment content length: %ld bytes\n",segmentcontentlength);
 308
 309       /* calculate what the total object content length should have been */
 310       l = segmentcontentlength + 10 * (nsegments+1) + headerlength + 4;
 311       if (l != objectlength)
 312           printf("Warning: actual object length (%ld) != "
 313                  "stored object length (%ld)\n", l, objectlength);
 314   }
 315   fclose(infile);
 316   return 0;
 317 }