2011-12-16 22:04:51 +00:00
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/* reloc65 -- A part of xa65 - 65xx/65816 cross-assembler and utility suite
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* o65 file relocator
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*
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* Copyright (C) 1989-1997 Andr<EFBFBD> Fachat (a.fachat@physik.tu-chemnitz.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include "version.h"
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#define BUF (9*2+8) /* 16 bit header */
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#define programname "reloc65"
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#define progversion "v0.2.1"
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2014-08-20 19:53:15 +00:00
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#define author "Written by Andre Fachat"
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#define copyright "Copyright (C) 1997-2002 Andre Fachat."
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2011-12-16 22:04:51 +00:00
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typedef struct {
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char *fname;
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size_t fsize;
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unsigned char *buf;
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int tbase, tlen, dbase, dlen, bbase, blen, zbase, zlen;
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int tdiff, ddiff, bdiff, zdiff;
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unsigned char *segt;
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unsigned char *segd;
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unsigned char *utab;
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unsigned char *rttab;
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unsigned char *rdtab;
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unsigned char *extab;
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} file65;
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int read_options(unsigned char *f);
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int read_undef(unsigned char *f);
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unsigned char *reloc_seg(unsigned char *f, int len, unsigned char *rtab, file65 *fp, int undefwarn);
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unsigned char *reloc_globals(unsigned char *, file65 *fp);
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file65 file;
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unsigned char cmp[] = { 1, 0, 'o', '6', '5' };
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void usage(FILE *fp)
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{
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fprintf(fp,
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"Usage: %s [OPTION]... [FILE]...\n"
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"Relocator for o65 object files\n"
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"\n"
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" -b? addr relocates segment '?' (i.e. 't' for text segment,\n"
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" 'd' for data, 'b' for bss and 'z' for zeropage) to the new\n"
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" address `addr'\n"
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" -o file uses `file' as output file. Default is `a.o65'\n"
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" -x? extracts text `?' = `t' or data `?' = `d' segment from file\n",
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programname);
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fprintf(fp,
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" instead of writing back the whole file\n"
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" -X extracts the file such that text and data\n"
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" segments are chained, i.e. possibly relocating\n"
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" the data segment to the end of the text segment\n"
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2012-12-29 01:45:40 +00:00
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" -v verbose output\n"
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2011-12-16 22:04:51 +00:00
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" --version output version information and exit\n"
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" --help display this help and exit\n");
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}
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int main(int argc, char *argv[]) {
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int i = 1, mode, hlen;
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size_t n;
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FILE *fp;
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int tflag = 0, dflag = 0, bflag = 0, zflag = 0;
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int tbase = 0, dbase = 0, bbase = 0, zbase = 0;
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2022-03-27 21:01:03 +00:00
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int *base;
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2011-12-16 22:04:51 +00:00
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char *outfile = "a.o65";
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int extract = 0;
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2012-12-29 01:45:40 +00:00
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int verbose = 0;
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2011-12-16 22:04:51 +00:00
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if (argc <= 1) {
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usage(stderr);
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exit(1);
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}
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if (strstr(argv[1], "--help")) {
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usage(stdout);
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exit(0);
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}
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if (strstr(argv[1], "--version")) {
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version(programname, progversion, author, copyright);
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exit(0);
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}
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while(i<argc) {
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if(argv[i][0]=='-') {
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/* process options */
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switch(argv[i][1]) {
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2012-12-29 01:45:40 +00:00
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case 'v':
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verbose = 1;
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break;
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2011-12-16 22:04:51 +00:00
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case 'o':
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if(argv[i][2]) outfile=argv[i]+2;
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2022-03-27 21:01:03 +00:00
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else if(i + 1 < argc) outfile=argv[++i];
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else fprintf(stderr,"%s: missing output file\n",programname);
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2011-12-16 22:04:51 +00:00
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break;
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case 'X':
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extract=3;
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break;
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case 'b':
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2022-03-27 21:01:03 +00:00
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base=NULL;
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2011-12-16 22:04:51 +00:00
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switch(argv[i][2]) {
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case 't':
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tflag= 1;
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2022-03-27 21:01:03 +00:00
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base=&tbase;
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2011-12-16 22:04:51 +00:00
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break;
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case 'd':
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dflag= 1;
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2022-03-27 21:01:03 +00:00
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base=&dbase;
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2011-12-16 22:04:51 +00:00
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break;
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case 'b':
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bflag= 1;
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2022-03-27 21:01:03 +00:00
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base=&bbase;
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2011-12-16 22:04:51 +00:00
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break;
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case 'z':
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zflag= 1;
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2022-03-27 21:01:03 +00:00
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base=&zbase;
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2011-12-16 22:04:51 +00:00
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break;
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default:
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printf("Unknown segment type '%c' - ignored!\n", argv[i][2]);
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break;
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}
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2022-03-27 21:01:03 +00:00
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if (base != NULL) {
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if(argv[i][3]) *base = atoi(argv[i]+3);
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else if(i + 1 < argc) *base = atoi(argv[++i]);
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else fprintf(stderr,"%s: missing address\n",programname);
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}
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2011-12-16 22:04:51 +00:00
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break;
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case 'x': /* extract segment */
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switch(argv[i][2]) {
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case 't':
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extract = 1;
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break;
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case 'd':
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extract = 2;
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break;
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case 'z':
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case 'b':
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printf("Cannot extract segment type '%c' - ignored!\n", argv[i][2]);
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break;
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default:
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printf("Unknown segment type '%c' - ignored!\n", argv[i][2]);
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break;
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}
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break;
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default:
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2022-03-27 21:01:03 +00:00
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fprintf(stderr,"%s: %s unknown option, use '-?' for help\n",programname,argv[i]);
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2011-12-16 22:04:51 +00:00
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break;
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}
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} else {
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struct stat fs;
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file.fname=argv[i];
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stat(argv[i], &fs);
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file.fsize=fs.st_size;
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file.buf=malloc(file.fsize);
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if(!file.buf) {
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fprintf(stderr,"Oops, no more memory!\n");
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exit(1);
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}
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printf("reloc65: read file %s -> %s\n",argv[i],outfile);
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fp = fopen(argv[i],"rb");
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if(fp) {
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n = fread(file.buf, 1, file.fsize, fp);
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fclose(fp);
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if((n>=file.fsize) && (!memcmp(file.buf, cmp, 5))) {
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mode=file.buf[7]*256+file.buf[6];
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if(mode & 0x2000) {
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fprintf(stderr,"reloc65: %s: 32 bit size not supported\n", argv[i]);
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} else
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if(mode & 0x4000) {
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fprintf(stderr,"reloc65: %s: pagewise relocation not supported\n", argv[i]);
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} else {
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hlen = BUF+read_options(file.buf+BUF);
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file.tbase = file.buf[ 9]*256+file.buf[ 8];
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file.tlen = file.buf[11]*256+file.buf[10];
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2012-12-29 01:45:40 +00:00
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file.tdiff = tflag ? tbase - file.tbase : 0;
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2011-12-16 22:04:51 +00:00
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file.dbase = file.buf[13]*256+file.buf[12];
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file.dlen = file.buf[15]*256+file.buf[14];
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2012-12-29 01:45:40 +00:00
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file.ddiff = dflag ? dbase - file.dbase : 0;
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2011-12-16 22:04:51 +00:00
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if (extract == 3) {
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if (dflag) {
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2012-12-29 01:45:40 +00:00
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fprintf(stderr,"reloc65: %s: Warning: data segment address overrides -X option\n", argv[i]);
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} else {
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dbase = file.tbase + file.tdiff + file.tlen;
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file.ddiff = dbase - file.dbase;
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}
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2011-12-16 22:04:51 +00:00
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}
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2012-12-29 01:45:40 +00:00
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2011-12-16 22:04:51 +00:00
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file.bbase = file.buf[17]*256+file.buf[16];
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file.blen = file.buf[19]*256+file.buf[18];
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2012-12-29 01:45:40 +00:00
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file.bdiff = bflag ? bbase - file.bbase : 0;
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if (extract == 3) {
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if (bflag) {
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fprintf(stderr,"reloc65: %s: Warning: bss segment address overrides -X option\n", argv[i]);
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} else {
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bbase = file.dbase + file.ddiff + file.dlen;
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file.bdiff = bbase - file.bbase;
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}
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}
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2011-12-16 22:04:51 +00:00
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file.zbase = file.buf[21]*256+file.buf[20];
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2012-12-29 01:45:40 +00:00
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file.zlen = file.buf[23]*256+file.buf[22];
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file.zdiff = zflag ? zbase - file.zbase : 0;
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if (verbose) {
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printf("Relocating segments to:\n");
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printf("text segment @ $%04x - $%04x, %5d ($%04x) bytes, diff is %5d ($%04x)\n",
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file.tbase + file.tdiff, file.tbase + file.tdiff + file.tlen,
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file.tlen, file.tlen, file.tdiff, file.tdiff & 0xffff);
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printf("data segment @ $%04x - $%04x, %5d ($%04x) bytes, diff is %5d ($%04x)\n",
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file.dbase + file.ddiff, file.dbase + file.ddiff + file.dlen,
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file.dlen, file.dlen, file.ddiff, file.ddiff & 0xffff);
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printf("bss segment @ $%04x - $%04x, %5d ($%04x) bytes, diff is %5d ($%04x)\n",
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file.bbase + file.bdiff, file.bbase + file.bdiff + file.blen,
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file.blen, file.blen, file.bdiff, file.bdiff & 0xffff);
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printf("zero segment @ $%04x - $%04x, %5d ($%04x) bytes, diff is %5d ($%04x)\n",
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file.zbase + file.zdiff, file.zbase + file.zdiff + file.zlen,
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file.zlen, file.zlen, file.zdiff, file.zdiff & 0xffff);
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}
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2011-12-16 22:04:51 +00:00
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2012-12-29 01:45:40 +00:00
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/* pointer of position in file */
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2011-12-16 22:04:51 +00:00
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file.segt = file.buf + hlen;
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file.segd = file.segt + file.tlen;
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file.utab = file.segd + file.dlen;
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file.rttab = file.utab + read_undef(file.utab);
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file.rdtab = reloc_seg(file.segt, file.tlen, file.rttab,
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&file, extract);
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file.extab = reloc_seg(file.segd, file.dlen, file.rdtab,
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&file, extract);
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reloc_globals(file.extab, &file);
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if(tflag) {
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file.buf[ 9]= (tbase>>8)&255;
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file.buf[ 8]= tbase & 255;
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}
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if(dflag) {
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file.buf[13]= (dbase>>8)&255;
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file.buf[12]= dbase & 255;
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}
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if(bflag) {
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file.buf[17]= (bbase>>8)&255;
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file.buf[16]= bbase & 255;
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}
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if(zflag) {
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file.buf[21]= (zbase>>8)&255;
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file.buf[20]= zbase & 255;
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}
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fp = fopen(outfile, "wb");
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if(fp) {
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switch(extract) {
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case 0: /* whole file */
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fwrite(file.buf, 1, file.fsize, fp);
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break;
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case 1: /* text segment */
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fwrite(file.segt, 1, file.tlen, fp);
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break;
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case 2: /* data segment */
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fwrite(file.segd, 1, file.dlen, fp);
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|
|
break;
|
|
|
|
|
case 3: /* text+data */
|
|
|
|
|
fwrite(file.segt, 1, file.tlen, fp);
|
|
|
|
|
fwrite(file.segd, 1, file.dlen, fp);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
fclose(fp);
|
|
|
|
|
} else {
|
|
|
|
|
fprintf(stderr,"reloc65: write '%s': %s\n",
|
|
|
|
|
outfile, strerror(errno));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
fprintf(stderr,"reloc65: %s: not an o65 file!\n", argv[i]);
|
|
|
|
|
if(file.buf[0]==1 && file.buf[1]==8 && file.buf[3]==8) {
|
|
|
|
|
printf("%s: C64 BASIC executable (start address $0801)?\n", argv[i]);
|
|
|
|
|
} else
|
|
|
|
|
if(file.buf[0]==1 && file.buf[1]==4 && file.buf[3]==4) {
|
|
|
|
|
printf("%s: CBM PET BASIC executable (start address $0401)?\n", argv[i]);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
fprintf(stderr,"reloc65: read '%s': %s\n",
|
|
|
|
|
argv[i], strerror(errno));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
i++;
|
|
|
|
|
}
|
|
|
|
|
exit(0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int read_options(unsigned char *buf) {
|
|
|
|
|
int c, l=0;
|
|
|
|
|
|
|
|
|
|
c=buf[0];
|
|
|
|
|
while(c && c!=EOF) {
|
|
|
|
|
c&=255;
|
|
|
|
|
l+=c;
|
|
|
|
|
c=buf[l];
|
|
|
|
|
}
|
|
|
|
|
return ++l;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int read_undef(unsigned char *buf) {
|
|
|
|
|
int n, l = 2;
|
|
|
|
|
|
|
|
|
|
n = buf[0] + 256*buf[1];
|
|
|
|
|
while(n){
|
|
|
|
|
n--;
|
|
|
|
|
while(buf[l] != 0) {
|
|
|
|
|
l++;
|
|
|
|
|
}
|
|
|
|
|
l++;
|
|
|
|
|
}
|
|
|
|
|
return l;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#define reldiff(s) (((s)==2)?fp->tdiff:(((s)==3)?fp->ddiff:(((s)==4)?fp->bdiff:(((s)==5)?fp->zdiff:0))))
|
|
|
|
|
|
|
|
|
|
unsigned char *reloc_seg(unsigned char *buf, int len, unsigned char *rtab,
|
|
|
|
|
file65 *fp, int undefwarn) {
|
|
|
|
|
int adr = -1;
|
|
|
|
|
int type, seg, old, new;
|
|
|
|
|
/*printf("tdiff=%04x, ddiff=%04x, bdiff=%04x, zdiff=%04x\n",
|
|
|
|
|
fp->tdiff, fp->ddiff, fp->bdiff, fp->zdiff);*/
|
|
|
|
|
while(*rtab) {
|
|
|
|
|
if((*rtab & 255) == 255) {
|
|
|
|
|
adr += 254;
|
|
|
|
|
rtab++;
|
|
|
|
|
} else {
|
|
|
|
|
adr += *rtab & 255;
|
|
|
|
|
rtab++;
|
|
|
|
|
type = *rtab & 0xe0;
|
|
|
|
|
seg = *rtab & 0x07;
|
|
|
|
|
/*printf("reloc entry @ rtab=%p (offset=%d), adr=%04x, type=%02x, seg=%d\n",rtab-1, *(rtab-1), adr, type, seg);*/
|
|
|
|
|
rtab++;
|
|
|
|
|
switch(type) {
|
|
|
|
|
case 0x80: /* WORD - two byte address */
|
|
|
|
|
old = buf[adr] + 256*buf[adr+1];
|
|
|
|
|
new = old + reldiff(seg);
|
|
|
|
|
buf[adr] = new & 255;
|
|
|
|
|
buf[adr+1] = (new>>8)&255;
|
|
|
|
|
break;
|
|
|
|
|
case 0x40: /* HIGH - high byte of an address */
|
|
|
|
|
old = buf[adr]*256 + *rtab;
|
|
|
|
|
new = old + reldiff(seg);
|
|
|
|
|
buf[adr] = (new>>8)&255;
|
|
|
|
|
*rtab = new & 255;
|
|
|
|
|
rtab++;
|
|
|
|
|
break;
|
|
|
|
|
case 0x20: /* LOW - low byt of an address */
|
|
|
|
|
old = buf[adr];
|
|
|
|
|
new = old + reldiff(seg);
|
|
|
|
|
buf[adr] = new & 255;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if(seg==0) {
|
|
|
|
|
/* undefined segment entry */
|
|
|
|
|
if (undefwarn) {
|
|
|
|
|
fprintf(stderr,"reloc65: %s: Warning: undefined relocation table entry not handled!\n", fp->fname);
|
|
|
|
|
}
|
|
|
|
|
rtab+=2;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if(adr > len) {
|
|
|
|
|
fprintf(stderr,"reloc65: %s: Warning: relocation table entries past segment end!\n",
|
|
|
|
|
fp->fname);
|
|
|
|
|
fprintf(stderr, "reloc65: adr=%x len=%x\n", adr, len);
|
|
|
|
|
}
|
|
|
|
|
return ++rtab;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
unsigned char *reloc_globals(unsigned char *buf, file65 *fp) {
|
|
|
|
|
int n, old, new, seg;
|
|
|
|
|
|
|
|
|
|
n = buf[0] + 256*buf[1];
|
|
|
|
|
buf +=2;
|
|
|
|
|
|
|
|
|
|
while(n) {
|
|
|
|
|
/*printf("relocating %s, ", buf);*/
|
|
|
|
|
while(*(buf++));
|
|
|
|
|
seg = *buf;
|
|
|
|
|
old = buf[1] + 256*buf[2];
|
|
|
|
|
new = old + reldiff(seg);
|
|
|
|
|
/*printf("old=%04x, seg=%d, rel=%04x, new=%04x\n", old, seg, reldiff(seg), new);*/
|
|
|
|
|
buf[1] = new & 255;
|
|
|
|
|
buf[2] = (new>>8) & 255;
|
|
|
|
|
buf +=3;
|
|
|
|
|
n--;
|
|
|
|
|
}
|
|
|
|
|
return buf;
|
|
|
|
|
}
|
|
|
|
|
|