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   unsigned char buf[129],t,s,l;
  32   long o;
  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       l = 0;
  51       do {
  52         fread(&buf[l],1,1,infile);
  53       } while (buf[l++]);
  54       printf("  import: segment %04x = %s\n",translateshort(rs),buf);
  55       length -= l + 3;
  56       break;
  57     case 3:             /* export record */
  58       fread(&s,1,1,infile);
  59       fread(&o,4,1,infile);
  60       l = 0;
  61       do {
  62         fread(&buf[l],1,1,infile);
  63       } while (buf[l++]);
  64       printf("  export: (%04x:%08lx) = %s\n",(int)s,translatelong(o),buf);
  65       length -= l + 6;
  66       break;
  67     case 4:             /* DLL record */
  68       l = 0;
  69       do {
  70         fread(&buf[l],1,1,infile);
  71       } while (buf[l++]);
  72       printf("  dll: %s\n",buf);
  73       length -= l + 1;
  74       break;
  75     case 5:             /* BSS reservation */
  76       fread(&l,4,1,infile);
  77       printf("  bss reservation: %08lx bytes\n",translatelong(l));
  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
  92   puts("RDOFF Dump utility v1.1 (C) Copyright 1996 Julian R Hall");
  93
  94   if (argc < 2) {
  95     fputs("Usage: rdfdump [-v] <filename>\n",stderr);
  96     exit(1);
  97   }
  98
  99   if (! strcmp (argv[1], "-v") )
 100   {
 101     verbose = 1;
 102     if (argc < 3)
 103     {
 104       fputs("required parameter missing\n",stderr);
 105       exit(1);
 106     }
 107     argv++;
 108   }
 109
 110   infile = fopen(argv[1],"rb");
 111   if (! infile) {
 112     fprintf(stderr,"rdfdump: Could not open %s",argv[1]);
 113     exit(1);
 114   }
 115
 116   fread(id,6,1,infile);
 117   if (strncmp(id,"RDOFF",5)) {
 118     fputs("rdfdump: File does not contain valid RDOFF header\n",stderr);
 119     exit(1);
 120   }
 121
 122   printf("File %s: RDOFF version %c\n\n",argv[1],id[5]);
 123   if (id[5] < '1' || id[5] > '1') {
 124     fprintf(stderr,"rdfdump: unknown RDOFF version '%c'\n",id[5]);
 125     exit(1);
 126   }
 127
 128   fread(&l,4,1,infile);
 129   l = translatelong(l);
 130   printf("Header (%ld bytes):\n",l);
 131   print_header(l);
 132
 133   fread(&l,4,1,infile);
 134   l = translatelong(l);
 135   printf("\nText segment length = %ld bytes\n",l);
 136   while(l--) {
 137     fread(id,1,1,infile);
 138     if (verbose) printf("  %02x",(int) (unsigned char)id[0]);
 139   }
 140   if (verbose) printf("\n\n");
 141
 142   fread(&l,4,1,infile);
 143   l = translatelong(l);
 144   printf("Data segment length = %ld bytes\n",l);
 145
 146   if (verbose)
 147   {
 148     while (l--) {
 149       fread(id,1,1,infile);
 150       printf("  %02x",(int) (unsigned char) id[0]);
 151     }
 152     printf("\n");
 153   }
 154   fclose(infile);
 155   return 0;
 156 }