147 lines
2.5 KiB
C
147 lines
2.5 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/*
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* dit programma leest een a.out file
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* voor een kleine uP (adres space = 64K)
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* en levert aan de standaard output een
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* download formaat voor de MCCPM computer.
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*
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*/
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#define MAXBYTE 24
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#include <stdio.h>
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#include <out.h>
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char hex[] = "0123456789ABCDEF";
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char **s;
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int bytes, bytcnt, checksum;
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unsigned pc;
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unsigned offset;
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unsigned htou();
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main (argc,argv)
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int argc;
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char *argv[];
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{
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if (argc > 3)
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fatal ("usage: %s filename [start-adres]\n",argv[0]);
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offset = 0;
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if (argc == 3)
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if (!(offset = htou(argv[2])))
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fatal ("adres error %s\n", argv[2]);
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if (! rd_open(*++argv)) fatal ("can't open %s\n",*argv);
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else {
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s = argv;
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convert ();
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}
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}
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convert ()
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{
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struct outhead head;
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struct outsect sect[MAXSECT];
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int i;
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rd_ohead(&head);
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if (head.oh_flags & HF_LINK) {
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fatal("%s contains unresolved references\n",s);
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}
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rd_sect(sect, head.oh_nsect);
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for (i = 0; i < head.oh_nsect; i++) {
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rd_outsect(i);
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pc = sect[i].os_base - offset;
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while (sect[i].os_size) {
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unsigned int sz = 8096, fl;
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extern char *calloc();
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register char *buf;
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char *pbuf;
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if (sz > sect[i].os_size) sz = sect[i].os_size;
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sect[i].os_size -= sz;
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pbuf = buf = calloc(sz, 1);
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if (fl = sect[i].os_flen) {
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if (fl > sz) fl = sz;
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sect[i].os_flen -= fl;
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rd_emit(buf, (long) fl);
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}
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while (sz >= MAXBYTE) {
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data(MAXBYTE, (int) pc, buf);
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checksum = 0;
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sz -= MAXBYTE;
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buf += MAXBYTE;
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pc += MAXBYTE;
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}
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if (sz > 0) {
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data(sz, (int) pc, buf);
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checksum = 0;
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}
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free(pbuf);
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}
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}
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printf (":00000001FF\n");
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}
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data (sz, pc, buf)
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register char *buf;
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{
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printf (":");
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outbyte (sz);
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bytcnt += 4;
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outbyte (pc >> 8);
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outbyte (pc);
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outbyte (0);
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while (sz != 0)
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{
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outbyte (*buf++);
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sz--;
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}
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outbyte (-checksum);
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putchar ('\n');
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putchar (0);
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putchar (0);
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}
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outbyte (b)
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int b;
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{
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checksum = (checksum + b) & 0xFF;
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putchar (hex[(b>>4) & 0xF]);
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putchar (hex[b & 0xF]);
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}
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fatal (s,a)
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char *s, *a;
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{
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fprintf (stderr,s,a);
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exit (-1);
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}
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rd_fatal()
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{
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fatal("Read error\n");
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}
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/* convert a string of hex digits to an unsigned 16 bit number */
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unsigned htou(t)
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char *t;
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{
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unsigned n = 0;
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char c;
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while(c = *t++){
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if(c >= '0' && c <= '9')
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c -= '0';
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else if(c >= 'a' && c <= 'f')
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c -= 'a' - 10;
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else if(c >= 'A' && c <= 'F')
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c -= 'A' - 10;
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else
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return(0);
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n = n * 16 + c;
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}
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return(n);
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}
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