rdoff/rdfdump.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 FILE *infile;
   6
   7 long translatelong(long in) {           /* translate from little endian to
   8                                            local representation */
   9   long r;
  10   unsigned char *i;
  11
  12   i = (unsigned char *)&in;
  13   r = i[3];
  14   r = (r << 8) + i[2];
  15   r = (r << 8) + i[1];
  16   r = (r << 8) + *i;
  17
  18   return r;
  19 }
  20
  21 int translateshort(short in) {
  22   int r;
  23   unsigned char *i;
  24
  25   i = (unsigned char *)&in;
  26   r = (i[1] << 8) + *i;
  27
  28   return r;
  29 }
  30 void print_header(long length) {
  31   char buf[129],t,s,l;
  32   long o,ll;
  33   short rs;
  34
  35   while (length > 0) {
  36     fread(&t,1,1,infile);
  37     switch(t) {
  38     case 1:             /* relocation record */
  39       fread(&s,1,1,infile);
  40       fread(&o,4,1,infile);
  41       fread(&l,1,1,infile);
  42       fread(&rs,2,1,infile);
  43       printf("  relocation: location (%04x:%08lx), length %d, "
  44              "referred seg %04x\n",(int)s,translatelong(o),(int)l,
  45              translateshort(rs));
  46       length -= 9;
  47       break;
  48     case 2:             /* import record */
  49       fread(&rs,2,1,infile);
  50       ll = 0;
  51       do {
  52         fread(&buf[ll],1,1,infile);
  53       } while (buf[ll++]);
  54       printf("  import: segment %04x = %s\n",translateshort(rs),buf);
  55       length -= ll + 3;
  56       break;
  57     case 3:             /* export record */
  58       fread(&s,1,1,infile);
  59       fread(&o,4,1,infile);
  60       ll = 0;
  61       do {
  62         fread(&buf[ll],1,1,infile);
  63       } while (buf[ll++]);
  64       printf("  export: (%04x:%08lx) = %s\n",(int)s,translatelong(o),buf);
  65       length -= ll + 6;
  66       break;
  67     case 4:             /* DLL record */
  68       ll = 0;
  69       do {
  70         fread(&buf[ll],1,1,infile);
  71       } while (buf[ll++]);
  72       printf("  dll: %s\n",buf);
  73       length -= ll + 1;
  74       break;
  75     case 5:             /* BSS reservation */
  76       fread(&ll,4,1,infile);
  77       printf("  bss reservation: %08lx bytes\n",translatelong(ll));
  78       length -= 5;
  79       break;
  80     default:
  81       printf("  unrecognised record (type %d)\n",(int)t);
  82       length --;
  83     }
  84   }
  85 }
  86
  87 int main(int argc,char **argv) {
  88   char id[7];
  89   long l;
  90   int verbose = 0;
  91   long offset;
  92
  93   puts("RDOFF Dump utility v1.1 (C) Copyright 1996 Julian R Hall");
  94
  95   if (argc < 2) {
  96     fputs("Usage: rdfdump [-v] <filename>\n",stderr);
  97     exit(1);
  98   }
  99
 100   if (! strcmp (argv[1], "-v") )
 101   {
 102     verbose = 1;
 103     if (argc < 3)
 104     {
 105       fputs("required parameter missing\n",stderr);
 106       exit(1);
 107     }
 108     argv++;
 109   }
 110
 111   infile = fopen(argv[1],"rb");
 112   if (! infile) {
 113     fprintf(stderr,"rdfdump: Could not open %s",argv[1]);
 114     exit(1);
 115   }
 116
 117   fread(id,6,1,infile);
 118   if (strncmp(id,"RDOFF",5)) {
 119     fputs("rdfdump: File does not contain valid RDOFF header\n",stderr);
 120     exit(1);
 121   }
 122
 123   printf("File %s: RDOFF version %c\n\n",argv[1],id[5]);
 124   if (id[5] < '1' || id[5] > '1') {
 125     fprintf(stderr,"rdfdump: unknown RDOFF version '%c'\n",id[5]);
 126     exit(1);
 127   }
 128
 129   fread(&l,4,1,infile);
 130   l = translatelong(l);
 131   printf("Header (%ld bytes):\n",l);
 132   print_header(l);
 133
 134   fread(&l,4,1,infile);
 135   l = translatelong(l);
 136   printf("\nText segment length = %ld bytes\n",l);
 137   offset = 0;
 138   while(l--) {
 139     fread(id,1,1,infile);
 140     if (verbose) {
 141       if (offset % 16 == 0)
 142         printf("\n%08lx ", offset);
 143       printf(" %02x",(int) (unsigned char)id[0]);
 144       offset++;
 145     }
 146   }
 147   if (verbose) printf("\n\n");
 148
 149   fread(&l,4,1,infile);
 150   l = translatelong(l);
 151   printf("Data segment length = %ld bytes\n",l);
 152
 153   if (verbose)
 154   {
 155     offset = 0;
 156     while (l--) {
 157       fread(id,1,1,infile);
 158       if (offset % 16 == 0)
 159         printf("\n%08lx ", offset);
 160       printf(" %02x",(int) (unsigned char) id[0]);
 161       offset++;
 162     }
 163     printf("\n");
 164   }
 165   fclose(infile);
 166   return 0;
 167 }