xa65/xa/src/xar2.c

/* xa65 - 65xx/65816 cross-assembler and utility suite
 *
 * Copyright (C) 1989-1997 Andr<64> Fachat (a.fachat@physik.tu-chemnitz.de)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <stdio.h>
#include <stdlib.h>

#include "xah.h"
#include "xa.h"
#include "xar.h"

/*
 static relocateInfo *rlist = NULL;
 static int mlist = 0, nlist = 0;
 static int first = -1;
 */

/* int rmode; */

int rd_set(int pc, int afl, int l, int lab) {
	int p, pp;

	/*	if(!rmode) return 0; */

	/*printf("set relocation @$%04x, l=%d, afl=%04x\n",pc, l, afl);*/

	if (l == 2 && ((afl & A_MASK) != A_ADR)) {
		errout(W_BYTRELOC);
		/*printf("Warning: byte relocation in word value at PC=$%04x!\n",pc);*/
	}
	if (l == 1 && ((afl & A_MASK) == A_ADR)) {
		if ((afl & A_FMASK) != (SEG_ZERO << 8))
			errout(W_ADRRELOC);
		/*printf("Warning: cutting address relocation in byte value at PC=$%04x!\n",pc);*/
		afl = (afl & (~A_MASK)) | A_LOW;
	}

	if (afile->rd.nlist >= afile->rd.mlist) {
		afile->rd.mlist += 500;
		afile->rd.rlist = realloc(afile->rd.rlist,
				afile->rd.mlist * sizeof(relocateInfo));
	}
	if (!afile->rd.rlist) {
		fprintf(stderr, "Oops: no memory for relocation table!\n");
		exit(1);
	}

	afile->rd.rlist[afile->rd.nlist].adr = pc;
	afile->rd.rlist[afile->rd.nlist].afl = afl;
	afile->rd.rlist[afile->rd.nlist].lab = lab;
	afile->rd.rlist[afile->rd.nlist].next = -1;

	/* sorting this into the list is not optimized, to be honest... */
	if (afile->rd.first < 0) {
		afile->rd.first = afile->rd.nlist;
	} else {
		p = afile->rd.first;
		pp = -1;
		while (afile->rd.rlist[p].adr < pc && afile->rd.rlist[p].next >= 0) {
			pp = p;
			p = afile->rd.rlist[p].next;
		}
		/*
		 printf("endloop: p=%d(%04x), pp=%d(%04x), nlist=%d(%04x)\n",
		 p,p<0?0:afile->rd.rlist[p].adr,pp,pp<0?0:afile->rd.rlist[pp].adr,afile->rd.nlist,afile->rd.nlist<0?0:afile->rd.rlist[afile->rd.nlist].adr);
		 */
		if (afile->rd.rlist[p].next < 0 && afile->rd.rlist[p].adr < pc) {
			afile->rd.rlist[p].next = afile->rd.nlist;
		} else if (pp == -1) {
			afile->rd.rlist[afile->rd.nlist].next = afile->rd.first;
			afile->rd.first = afile->rd.nlist;
		} else {
			afile->rd.rlist[afile->rd.nlist].next = p;
			afile->rd.rlist[pp].next = afile->rd.nlist;
		}
	}
	afile->rd.nlist++;

	return 0;
}

int rd_write(FILE *fp, int pc) {
	int p = afile->rd.first;
	int pc2, afl;

	while (p >= 0) {
		pc2 = afile->rd.rlist[p].adr;
		afl = afile->rd.rlist[p].afl;
		/*printf("rd_write: pc=%04x, pc2=%04x, afl=%x\n",pc,pc2,afl);*/
		/* hack to switch undef and abs flag from internal to file format */
		if (((afl & A_FMASK) >> 8) < SEG_TEXT)
			afl ^= 0x100;
		if ((pc2 - pc) < 0) {
			fprintf(stderr, "Oops, negative offset!\n");
		} else {
			while ((pc2 - pc) > 254) {
				fputc(255, fp);
				pc += 254;
			}
			fputc(pc2 - pc, fp);
			pc = pc2;
			if ((afile->rd.rlist[p].afl & A_FMASK) == (SEG_UNDEFZP << 8)) {
				fputc((((afl & ~A_FMASK) >> 8) & 255) | SEG_UNDEF, fp);
				fputc(afile->rd.rlist[p].lab & 255, fp);
				fputc((afile->rd.rlist[p].lab >> 8) & 255, fp);
			} else {
				fputc((afl >> 8) & 255, fp);
				if (((afile->rd.rlist[p].afl & A_FMASK) == (SEG_UNDEF << 8))) {
					fputc(afile->rd.rlist[p].lab & 255, fp);
					fputc((afile->rd.rlist[p].lab >> 8) & 255, fp);
				}
			}
			if ((afl & A_MASK) == A_HIGH)
				fputc(afl & 255, fp);
		}
		p = afile->rd.rlist[p].next;
	}
	fputc(0, fp);

	free(afile->rd.rlist);
	afile->rd.rlist = NULL;
	afile->rd.mlist = afile->rd.nlist = 0;
	afile->rd.first = -1;

	return 0;
}