int rdl_verify(const char *filename)
{
FILE *fp;
char buf[257];
int i;
int32_t length;
static char lastverified[256];
static int lastresult = -1;
if (lastresult != -1 && !strcmp(filename, lastverified))
return lastresult;
fp = fopen(filename, "rb");
strcpy(lastverified, filename);
if (!fp)
return (rdl_error = lastresult = 1);
while (!feof(fp)) {
i = 0;
while (fread(buf + i, 1, 1, fp) == 1 && i < 257 && buf[i])
i++;
if (feof(fp))
break;
if (buf[0] == '.') {
/*
* A special module, eg a signature block or a directory.
* Format of such a module is defined to be:
* six char type identifier
* int32_t count bytes content
* content
* so we can handle it uniformaly with RDOFF2 modules.
*/
nasm_read(buf, 6, fp);
buf[6] = 0;
/* Currently, nothing useful to do with signature block.. */
} else {
nasm_read(buf, 6, fp);
buf[6] = 0;
if (strncmp(buf, "RDOFF", 5)) {
fclose(fp);
return rdl_error = lastresult = 2;
} else if (buf[5] != '2') {
fclose(fp);
return rdl_error = lastresult = 3;
}
}
nasm_read(&length, 4, fp);
fseek(fp, length, SEEK_CUR); /* skip over the module */
}
fclose(fp);
return lastresult = 0; /* library in correct format */
}
int rdl_openmodule(struct librarynode *lib, int moduleno, rdffile * f)
{
char buf[512];
int i, cmod, t;
int32_t length;
lib->referenced++;
if (!lib->fp) {
lib->fp = fopen(lib->name, "rb");
if (!lib->fp) {
lib->referenced--;
return (rdl_error = 1);
}
} else
rewind(lib->fp);
cmod = -1;
while (!feof(lib->fp)) {
strcpy(buf, lib->name);
i = strlen(buf);
buf[i++] = '.';
t = i;
while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
i++;
buf[i] = 0;
if (feof(lib->fp))
break;
if (buf[t] != '.') /* special module - not counted in the numbering */
cmod++; /* of RDOFF modules - must be referred to by name */
if (cmod == moduleno) {
rdl_error = 16 *
rdfopenhere(f, lib->fp, &lib->referenced, buf);
lib->referenced--;
if (!lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error;
}
nasm_read(buf, 6, lib->fp);
buf[6] = 0;
if (buf[t] == '.') {
/* do nothing */
} else if (strncmp(buf, "RDOFF", 5)) {
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 2;
} else if (buf[5] != '2') {
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 3;
}
nasm_read(&length, 4, lib->fp);
fseek(lib->fp, length, SEEK_CUR); /* skip over the module */
}
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 4; /* module not found */
}
static void print_header(int32_t length, int rdf_version)
{
char buf[129], t, l, s, flags;
uint8_t reclen;
int32_t o, ll;
uint16_t rs;
while (length > 0) {
nasm_read(&t, 1, infile);
if (rdf_version >= 2) {
nasm_read(&reclen, 1, infile);
}
switch (t) {
case RDFREC_GENERIC: /* generic record */
printf(" generic record (length=%d)\n", (int)reclen);
fseek(infile, reclen, SEEK_CUR);
break;
case RDFREC_RELOC: /* relocation record */
case RDFREC_SEGRELOC: /* segment relocation */
nasm_read(&s, 1, infile);
nasm_read(&o, 4, infile);
nasm_read(&l, 1, infile);
nasm_read(&rs, 2, infile);
printf(" %s: location (%04x:%08"PRIx32"), length %d, "
"referred seg %04x\n",
t == 1 ? "relocation" : "seg relocation", (int)s,
translateint32_t(o), (int)l, translateint16_t(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 RDFREC_IMPORT: /* import record */
case RDFREC_FARIMPORT: /* import far symbol */
nasm_read(&flags, 1, infile);
nasm_read(&rs, 2, infile);
ll = 0;
if (rdf_version == 1) {
do {
nasm_read(&buf[ll], 1, infile);
} while (buf[ll++]);
} else {
for (; ll < reclen - 3; ll++)
nasm_read(&buf[ll], 1, infile);
}
if (t == 7)
printf("far ");
printf((flags & SYM_IMPORT) ? " import" : " extern");
if (flags & SYM_FUNCTION)
printf(" proc");
if (flags & SYM_DATA)
printf(" data");
printf(": segment %04x = %s\n", translateint16_t(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 RDFREC_GLOBAL: /* export record */
nasm_read(&flags, 1, infile);
nasm_read(&s, 1, infile);
nasm_read(&o, 4, infile);
ll = 0;
if (rdf_version == 1) {
do {
nasm_read(&buf[ll], 1, infile);
} while (buf[ll++]);
} else {
for (; ll < reclen - 6; ll++)
nasm_read(&buf[ll], 1, infile);
}
printf((flags & SYM_GLOBAL) ? " export" : " public");
if (flags & SYM_FUNCTION)
printf(" proc");
if (flags & SYM_DATA)
printf(" data");
printf(": (%04x:%08"PRIx32") = %s\n", (int)s, translateint32_t(o), buf);
if (rdf_version == 1)
length -= ll + 6;
break;
case RDFREC_DLL: /* DLL and Module records */
case RDFREC_MODNAME:
ll = 0;
if (rdf_version == 1) {
do {
nasm_read(&buf[ll], 1, infile);
} while (buf[ll++]);
} else {
for (; ll < reclen; ll++)
nasm_read(&buf[ll], 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 RDFREC_BSS: /* BSS reservation */
nasm_read(&ll, 4, infile);
printf(" bss reservation: %08"PRIx32" bytes\n", translateint32_t(ll));
if (rdf_version == 1)
length -= 5;
if (rdf_version > 1 && reclen != 4)
printf(" warning: reclen != 4\n");
break;
case RDFREC_COMMON:{
uint16_t seg, align;
uint32_t size;
nasm_read(&seg, 2, infile);
nasm_read(&size, 4, infile);
nasm_read(&align, 2, infile);
for (ll = 0; ll < reclen - 8; ll++)
nasm_read(buf + ll, 1, infile);
printf(" common: segment %04x = %s, %"PRId32":%d\n",
translateint16_t(seg), buf, translateint32_t(size),
translateint16_t(align));
break;
}
default:
printf(" unrecognized record (type %d", (int)t);
if (rdf_version > 1) {
printf(", length %d", (int)reclen);
fseek(infile, reclen, SEEK_CUR);
} else
length--;
printf(")\n");
}
if (rdf_version != 1)
length -= 2 + reclen;
}
}
int rdl_searchlib(struct librarynode *lib, const char *label, rdffile * f)
{
char buf[512];
int i, t;
void *hdr;
rdfheaderrec *r;
int32_t l;
rdl_error = 0;
lib->referenced++;
if (!lib->fp) {
lib->fp = fopen(lib->name, "rb");
if (!lib->fp) {
rdl_error = 1;
return 0;
}
} else
rewind(lib->fp);
while (!feof(lib->fp)) {
/*
* read the module name from the file, and prepend
* the library name and '.' to it.
*/
strcpy(buf, lib->name);
i = strlen(lib->name);
buf[i++] = '.';
t = i;
while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
i++;
buf[i] = 0;
if (feof(lib->fp))
break;
if (!strcmp(buf + t, ".dir")) { /* skip over directory */
nasm_read(&l, 4, lib->fp);
fseek(lib->fp, l, SEEK_CUR);
continue;
}
/*
* open the RDOFF module
*/
if (rdfopenhere(f, lib->fp, &lib->referenced, buf)) {
rdl_error = 16 * rdf_errno;
return 0;
}
/*
* read in the header, and scan for exported symbols
*/
hdr = nasm_malloc(f->header_len);
rdfloadseg(f, RDOFF_HEADER, hdr);
while ((r = rdfgetheaderrec(f))) {
if (r->type != 3) /* not an export */
continue;
if (!strcmp(r->e.label, label)) { /* match! */
nasm_free(hdr); /* reset to 'just open' */
f->header_loc = NULL; /* state... */
f->header_fp = 0;
return 1;
}
}
/* find start of next module... */
i = f->eof_offset;
rdfclose(f);
fseek(lib->fp, i, SEEK_SET);
}
/*
* close the file if nobody else is using it
*/
lib->referenced--;
if (!lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return 0;
}
int main(int argc, char **argv)
{
char id[7];
int32_t l;
uint16_t s;
int verbose = 0;
int32_t offset;
int foundnullsegment = 0;
int version;
int32_t segmentcontentlength = 0;
int nsegments = 0;
int32_t headerlength = 0;
int32_t objectlength = 0;
printf("RDOFF dump utility, version %s\n", PROGRAM_VERSION);
printf("RDOFF2 revision %s\n", RDOFF2_REVISION);
puts("Copyright (c) 1996,99 Julian R Hall\n"
"Improvements and fixes (c) 2002-2004 RET & COM Research.");
if (argc < 2) {
fputs("Usage: rdfdump [-v] <filename>\n", stderr);
exit(1);
}
rdoff_init();
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);
}
nasm_read(id, 6, 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) {
nasm_read(&l, 4, infile);
objectlength = translateint32_t(l);
printf("Object content size: %"PRId32" bytes\n", objectlength);
}
nasm_read(&l, 4, infile);
headerlength = translateint32_t(l);
printf("Header (%"PRId32" bytes):\n", headerlength);
print_header(headerlength, version);
if (version == 1) {
nasm_read(&l, 4, infile);
l = translateint32_t(l);
printf("\nText segment length = %"PRId32" bytes\n", l);
offset = 0;
while (l--) {
nasm_read(id, 1, infile);
if (verbose) {
if (offset % 16 == 0)
printf("\n%08"PRIx32" ", offset);
printf(" %02x", (int)(uint8_t)id[0]);
offset++;
}
}
if (verbose)
printf("\n\n");
nasm_read(&l, 4, infile);
l = translateint32_t(l);
printf("Data segment length = %"PRId32" bytes\n", l);
if (verbose) {
offset = 0;
while (l--) {
nasm_read(id, 1, infile);
if (offset % 16 == 0)
printf("\n%08"PRIx32" ", offset);
printf(" %02x", (int)(uint8_t)id[0]);
offset++;
}
printf("\n");
}
} else {
do {
nasm_read(&s, 2, infile);
s = translateint16_t(s);
if (!s) {
printf("\nNULL segment\n");
foundnullsegment = 1;
break;
}
printf("\nSegment:\n Type = %04X (%s)\n", (int)s,
translatesegmenttype(s));
nsegments++;
nasm_read(&s, 2, infile);
printf(" Number = %04X\n", (int)translateint16_t(s));
nasm_read(&s, 2, infile);
printf(" Resrvd = %04X\n", (int)translateint16_t(s));
nasm_read(&l, 4, infile);
l = translateint32_t(l);
printf(" Length = %"PRId32" bytes\n", l);
segmentcontentlength += l;
offset = 0;
while (l--) {
nasm_read(id, 1, infile);
if (verbose) {
if (offset % 16 == 0)
printf("\n%08"PRIx32" ", offset);
printf(" %02x", (int)(uint8_t)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: %"PRId32" 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 (%"PRId32") != "
"stored object length (%"PRId32")\n", l, objectlength);
}
fclose(infile);
return 0;
}