317 lines
7.9 KiB
C
317 lines
7.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rdoff.h"
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#include "multboot.h"
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FILE *infile;
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long translatelong(long in) { /* translate from little endian to
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local representation */
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long r;
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unsigned char *i;
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i = (unsigned char *)∈
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r = i[3];
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r = (r << 8) + i[2];
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r = (r << 8) + i[1];
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r = (r << 8) + *i;
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return r;
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}
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int16 translateshort(int16 in) {
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int r;
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unsigned char *i;
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i = (unsigned char *)∈
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r = (i[1] << 8) + *i;
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return r;
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}
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void print_header(long length, int rdf_version) {
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char buf[129],t,s,l,flags;
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unsigned char reclen;
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long o,ll;
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int16 rs;
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struct tMultiBootHeader *mb;
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while (length > 0) {
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fread(&t,1,1,infile);
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if (rdf_version >= 2) {
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fread(&reclen,1,1,infile);
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}
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switch(t) {
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case 1: /* relocation record */
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case 6: /* segment relocation */
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fread(&s,1,1,infile);
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fread(&o,4,1,infile);
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fread(&l,1,1,infile);
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fread(&rs,2,1,infile);
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printf(" %s: location (%04x:%08lx), length %d, "
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"referred seg %04x\n", t == 1 ? "relocation" : "seg relocation",
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(int)s,translatelong(o),(int)l,
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translateshort(rs));
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if (rdf_version >= 2 && reclen != 8)
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printf(" warning: reclen != 8\n");
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if (rdf_version == 1) length -= 9;
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if (rdf_version == 1 && t == 6)
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printf(" warning: seg relocation not supported in RDOFF1\n");
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break;
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case 2: /* import record */
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case 7: /* import far symbol */
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fread(&rs,2,1,infile);
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ll = 0;
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if (rdf_version == 1) {
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do {
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fread(&buf[ll],1,1,infile);
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} while (buf[ll++]);
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}
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else
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{
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for (;ll < reclen - 2; ll++)
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fread(&buf[ll],1,1,infile);
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}
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printf(" %simport: segment %04x = %s\n",t == 7 ? "far " : "",
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translateshort(rs),buf);
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if (rdf_version == 1) length -= ll + 3;
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if (rdf_version == 1 && t == 7)
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printf (" warning: far import not supported in RDOFF1\n");
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break;
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case 3: /* export record */
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fread(&flags,1,1,infile);
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fread(&s,1,1,infile);
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fread(&o,4,1,infile);
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ll = 0;
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if (rdf_version == 1) {
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do {
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fread(&buf[ll],1,1,infile);
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} while (buf[ll++]);
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}
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else
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{
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for (; ll < reclen - 6; ll ++)
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fread(&buf[ll],1,1,infile);
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}
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if (flags & SYM_GLOBAL)
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printf(" export");
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else
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printf(" global");
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if (flags & SYM_FUNCTION) printf(" proc");
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if (flags & SYM_DATA) printf(" data");
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printf(": (%04x:%08lx) = %s\n",(int)s,translatelong(o),buf);
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if (rdf_version == 1) length -= ll + 6;
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break;
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case 4: /* DLL and Module records */
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case 8:
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ll = 0;
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if (rdf_version == 1) {
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do {
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fread(&buf[ll],1,1,infile);
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} while (buf[ll++]);
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}
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else
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{
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for (; ll < reclen; ll++)
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fread(&buf[ll],1,1,infile);
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}
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if (t==4) printf(" dll: %s\n",buf);
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else printf(" module: %s\n",buf);
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if (rdf_version == 1) length -= ll + 1;
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break;
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case 5: /* BSS reservation */
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fread(&ll,4,1,infile);
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printf(" bss reservation: %08lx bytes\n",translatelong(ll));
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if (rdf_version == 1) length -= 5;
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if (rdf_version > 1 && reclen != 4)
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printf(" warning: reclen != 4\n");
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break;
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case 9: /* MultiBoot header record */
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fread(buf,reclen,1,infile);
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mb = (struct tMultiBootHeader *)buf;
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printf(" multiboot header: load address=0x%X, size=0x%X, entry=0x%X\n",
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mb->LoadAddr, mb->LoadEndAddr - mb->LoadAddr, mb->Entry);
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break;
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default:
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printf(" unrecognised record (type %d",(int)t);
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if (rdf_version > 1) {
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printf(", length %d",(int)reclen);
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fseek(infile,reclen,SEEK_CUR);
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}
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printf(")\n");
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if (rdf_version == 1) length --;
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}
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if (rdf_version != 1) length -= 2 + reclen;
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}
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}
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char * knowntypes[8] = {"NULL", "text", "data", "object comment",
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"linked comment", "loader comment",
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"symbolic debug", "line number debug"};
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char * translatesegmenttype(int16 type) {
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if (type < 8) return knowntypes[type];
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if (type < 0x0020) return "reserved";
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if (type < 0x1000) return "reserved - moscow";
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if (type < 0x8000) return "reserved - system dependant";
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if (type < 0xFFFF) return "reserved - other";
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if (type == 0xFFFF) return "invalid type code";
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return "type code out of range";
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}
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int main(int argc,char **argv) {
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char id[7];
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long l;
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int16 s;
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int verbose = 0;
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long offset;
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int foundnullsegment = 0;
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int version;
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long segmentcontentlength = 0;
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int nsegments = 0;
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long headerlength = 0;
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long objectlength = 0;
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puts("RDOFF Dump utility v2.1\n(c) Copyright 1996,99,2000 Julian R Hall, Yuri M Zaporogets");
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if (argc < 2) {
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fputs("Usage: rdfdump [-v] <filename>\n",stderr);
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exit(1);
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}
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if (! strcmp (argv[1], "-v") )
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{
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verbose = 1;
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if (argc < 3)
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{
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fputs("required parameter missing\n",stderr);
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exit(1);
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}
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argv++;
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}
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infile = fopen(argv[1],"rb");
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if (! infile) {
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fprintf(stderr,"rdfdump: Could not open %s\n",argv[1]);
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exit(1);
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}
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fread(id,6,1,infile);
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if (strncmp(id,"RDOFF",5)) {
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fputs("rdfdump: File does not contain valid RDOFF header\n",stderr);
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exit(1);
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}
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printf("File %s: RDOFF version %c\n\n",argv[1],id[5]);
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if (id[5] < '1' || id[5] > '2') {
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fprintf(stderr,"rdfdump: unknown RDOFF version '%c'\n",id[5]);
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exit(1);
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}
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version = id[5] - '0';
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if (version > 1) {
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fread(&l, 4, 1, infile);
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objectlength = translatelong(l);
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printf("Object content size: %ld bytes\n", objectlength);
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}
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fread(&l,4,1,infile);
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headerlength = translatelong(l);
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printf("Header (%ld bytes):\n",headerlength);
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print_header(headerlength, version);
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if (version == 1) {
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fread(&l,4,1,infile);
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l = translatelong(l);
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printf("\nText segment length = %ld bytes\n",l);
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offset = 0;
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while(l--) {
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fread(id,1,1,infile);
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if (verbose) {
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if (offset % 16 == 0)
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printf("\n%08lx ", offset);
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printf(" %02x",(int) (unsigned char)id[0]);
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offset++;
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}
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}
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if (verbose) printf("\n\n");
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fread(&l,4,1,infile);
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l = translatelong(l);
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printf("Data segment length = %ld bytes\n",l);
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if (verbose)
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{
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offset = 0;
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while (l--) {
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fread(id,1,1,infile);
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if (offset % 16 == 0)
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printf("\n%08lx ", offset);
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printf(" %02x",(int) (unsigned char) id[0]);
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offset++;
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}
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printf("\n");
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}
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}
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else
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{
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do {
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fread(&s,2,1,infile);
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s = translateshort(s);
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if (!s) {
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printf("\nNULL segment\n");
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foundnullsegment = 1;
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break;
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}
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printf("\nSegment:\n Type = %04X (%s)\n",(int)s,
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translatesegmenttype(s));
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nsegments++;
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fread(&s,2,1,infile);
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printf(" Number = %04X\n",(int)translateshort(s));
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fread(&s,2,1,infile);
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printf(" Resrvd = %04X\n",(int)translateshort(s));
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fread(&l,4,1,infile);
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l = translatelong(l);
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printf(" Length = %ld bytes\n",l);
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segmentcontentlength += l;
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offset = 0;
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while(l--) {
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fread(id,1,1,infile);
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if (verbose) {
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if (offset % 16 == 0)
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printf("\n%08lx ", offset);
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printf(" %02x",(int) (unsigned char)id[0]);
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offset++;
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}
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}
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if (verbose) printf("\n");
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} while (!feof(infile));
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if (! foundnullsegment)
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printf("\nWarning: unexpected end of file - "
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"NULL segment not found\n");
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printf("\nTotal number of segments: %d\n", nsegments);
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printf("Total segment content length: %ld bytes\n",segmentcontentlength);
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/* calculate what the total object content length should have been */
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l = segmentcontentlength + 10 * (nsegments+1) + headerlength + 4;
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if (l != objectlength)
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printf("Warning: actual object length (%ld) != "
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"stored object length (%ld)\n", l, objectlength);
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}
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fclose(infile);
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return 0;
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}
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