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/* rdf2ihx: convert an RDOFF object file to Intel Hex format. This is based
on rdf2bin. Note that this program only writes 16-bit HEX. */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "rdfload.h"
#include "rdoff.h"
#include "nasmlib.h"
#include "symtab.h"
long origin = 0;
int align = 16;
/* This function writes a single n-byte data record to of. Maximum value
for n is 255. */
static int write_data_record(FILE *of, int ofs, int nbytes,
unsigned char *data)
{
int i, iofs;
unsigned int checksum;
iofs = ofs;
fprintf(of, ":%02X%04X00", nbytes, ofs);
checksum = 0;
for (i=0; i<nbytes; i++) {
fprintf(of, "%02X", data[i]);
ofs++;
checksum += data[i];
}
checksum = checksum + /* current checksum */
nbytes + /* RECLEN (one byte) */
((iofs >> 8) & 0xff) + /* high byte of load offset */
(iofs & 0xff); /* low byte of load offset */
checksum = ~checksum + 1;
fprintf(of, "%02X\n", checksum&0xff);
return(ofs);
}
int main(int argc, char **argv)
{
rdfmodule *m;
int tmp;
FILE *of;
char *padding;
unsigned char *segbin[2];
int pad[2], segn, ofs, i;
long segaddr;
unsigned int checksum;
symtabEnt *s;
if (argc < 2) {
puts("Usage: rdf2ihx [-o relocation-origin] [-p segment-alignment] "
"input-file output-file");
return(1);
}
argv++, argc--;
while (argc > 2) {
if (strcmp(*argv,"-o") == 0) {
argv++, argc--;
origin = readnum(*argv, &tmp);
if (tmp) {
fprintf(stderr,"rdf2ihx: invalid parameter: %s\n",*argv);
return 1;
}
} else if (strcmp(*argv,"-p") == 0) {
argv++, argc--;
align = readnum(*argv, &tmp);
if (tmp) {
fprintf(stderr,"rdf2ihx: invalid parameter: %s\n",*argv);
return 1;
}
} else
break;
argv++, argc--;
}
if (argc < 2) {
puts("rdf2ihx: required parameter missing");
return -1;
}
m = rdfload(*argv);
if (!m) {
rdfperror("rdf2ihx",*argv);
return 1;
}
printf("relocating %s: origin=%lx, align=%d\n",*argv, origin, align);
m->textrel = origin;
m->datarel = origin + m->f.seg[0].length;
if (m->datarel % align != 0) {
pad[0] = align - (m->datarel % align);
m->datarel += pad[0];
} else {
pad[0] = 0;
}
m->bssrel = m->datarel + m->f.seg[1].length;
if (m->bssrel % align != 0) {
pad[1] = align - (m->bssrel % align);
m->bssrel += pad[1];
} else {
pad[1] = 0;
}
printf("code: %08lx\ndata: %08lx\nbss: %08lx\n",
m->textrel, m->datarel, m->bssrel);
rdf_relocate(m);
argv++;
of = fopen(*argv,"w");
if (!of) {
fprintf(stderr,"rdf2ihx: could not open output file %s\n",*argv);
return(1);
}
padding = malloc(align);
if (!padding) {
fprintf(stderr,"rdf2ihx: out of memory\n");
return(1);
}
/* write extended segment address record */
fprintf(of, ":02000002"); /* Record mark, reclen, load offset & rectyp
fields for ext. seg. address record */
segaddr = ((origin >> 16) & 0xffff); /* segment address */
fprintf(of, "%04X", (unsigned int)(segaddr & 0xffff));
checksum = 0x02 + /* reclen */
0x0000 + /* Load Offset */
0x02 + /* Rectyp */
(segaddr & 0xff) + /* USBA low */
((segaddr >> 8) & 0xff); /* USBA high */
checksum = ~checksum + 1; /* two's-complement the checksum */
fprintf(of, "%02X\n", checksum & 0xff);
/* See if there's a '_main' symbol in the symbol table */
if ((s=symtabFind(m->symtab, "_main")) == NULL) {
printf("No _main symbol found, no start segment address record added\n");
} else {
printf("_main symbol found at %04x:%04x\n", s->segment,
(unsigned int)(s->offset & 0xffff));
/* Create a start segment address record for the _main symbol. */
segaddr = ((s->segment & 0xffff) << 16) + ((s->offset) & 0xffff);
fprintf(of, ":04000003"); /* Record mark, reclen, load offset & rectyp
fields for start seg. addr. record */
fprintf(of, "%08lX", segaddr); /* CS/IP field */
checksum = 0x04 + /* reclen */
0x0000 + /* load offset */
0x03 + /* Rectyp */
(segaddr & 0xff) + /* low-low byte of segaddr */
((segaddr >> 8) & 0xff) + /* low-high byte of segaddr */
((segaddr >> 16) & 0xff) + /* high-low byte of segaddr */
((segaddr >> 24) & 0xff); /* high-high byte of segaddr */
checksum = ~checksum + 1; /* two's complement */
fprintf(of, "%02X\n", checksum & 0xff);
}
/* Now it's time to write data records from the code and data segments in.
This current version doesn't check for segment overflow; proper behavior
should be to output a segment address record for the code and data
segments. Something to do. */
ofs = 0;
segbin[0] = m->t;
segbin[1] = m->d;
for (segn=0; segn<2; segn++) {
int mod, adr;
if (m->f.seg[segn].length == 0)
continue;
for (i=0; i+15<m->f.seg[segn].length; i+=16) {
ofs = write_data_record(of, ofs, 16, &segbin[segn][i]);
}
if ((mod=m->f.seg[segn].length & 0x000f) != 0) {
adr = m->f.seg[segn].length & 0xfff0;
ofs = write_data_record(of, ofs, mod, &segbin[segn][adr]);
}
}
/* output an end of file record */
fprintf(of, ":00000001FF\n");
fclose(of);
return 0;
}
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