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133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* xa65 - 65xx/65816 cross-assembler and utility suite
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*
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* Copyright (C) 1989-1997 André 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 "xah.h"
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#include "xa.h"
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#include "xar.h"
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/*
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static relocateInfo *rlist = NULL;
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static int mlist = 0, nlist = 0;
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static int first = -1;
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*/
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/* int rmode; */
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int rd_set(int pc, int afl, int l, int lab) {
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int p,pp;
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/* if(!rmode) return 0; */
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/*printf("set relocation @$%04x, l=%d, afl=%04x\n",pc, l, afl);*/
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if(l==2 && ((afl & A_MASK)!=A_ADR)) {
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errout(W_BYTRELOC);
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/*printf("Warning: byte relocation in word value at PC=$%04x!\n",pc);*/
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}
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if(l==1 && ((afl&A_MASK)==A_ADR)) {
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if((afl & A_FMASK) != (SEG_ZERO<<8)) errout(W_ADRRELOC);
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/*printf("Warning: cutting address relocation in byte value at PC=$%04x!\n",pc);*/
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afl = (afl & (~A_MASK)) | A_LOW;
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}
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if(afile->rd.nlist>=afile->rd.mlist) {
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afile->rd.mlist+=500;
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afile->rd.rlist=realloc(afile->rd.rlist, afile->rd.mlist*sizeof(relocateInfo));
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}
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if(!afile->rd.rlist) {
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fprintf(stderr, "Oops: no memory for relocation table!\n");
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exit(1);
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}
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afile->rd.rlist[afile->rd.nlist].adr = pc;
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afile->rd.rlist[afile->rd.nlist].afl = afl;
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afile->rd.rlist[afile->rd.nlist].lab = lab;
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afile->rd.rlist[afile->rd.nlist].next= -1;
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/* sorting this into the list is not optimized, to be honest... */
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if(afile->rd.first<0) {
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afile->rd.first = afile->rd.nlist;
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} else {
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p=afile->rd.first; pp=-1;
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while(afile->rd.rlist[p].adr<pc && afile->rd.rlist[p].next>=0) {
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pp=p;
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p=afile->rd.rlist[p].next;
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}
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/*
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printf("endloop: p=%d(%04x), pp=%d(%04x), nlist=%d(%04x)\n",
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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);
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*/
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if(afile->rd.rlist[p].next<0 && afile->rd.rlist[p].adr<pc) {
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afile->rd.rlist[p].next=afile->rd.nlist;
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} else
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if(pp==-1) {
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afile->rd.rlist[afile->rd.nlist].next = afile->rd.first;
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afile->rd.first = afile->rd.nlist;
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} else {
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afile->rd.rlist[afile->rd.nlist].next = p;
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afile->rd.rlist[pp].next = afile->rd.nlist;
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}
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}
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afile->rd.nlist++;
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return 0;
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}
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int rd_write(FILE *fp, int pc) {
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int p=afile->rd.first;
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int pc2, afl;
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while(p>=0) {
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pc2=afile->rd.rlist[p].adr;
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afl=afile->rd.rlist[p].afl;
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/*printf("rd_write: pc=%04x, pc2=%04x, afl=%x\n",pc,pc2,afl);*/
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/* hack to switch undef and abs flag from internal to file format */
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if( ((afl & A_FMASK)>>8) < SEG_TEXT) afl^=0x100;
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if((pc2-pc) < 0) {
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fprintf(stderr, "Oops, negative offset!\n");
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} else {
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while((pc2-pc)>254) {
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fputc(255,fp);
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pc+=254;
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}
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fputc(pc2-pc, fp);
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pc=pc2;
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fputc((afl>>8)&255, fp);
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if((afile->rd.rlist[p].afl&A_FMASK)==(SEG_UNDEF<<8)) {
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fputc(afile->rd.rlist[p].lab & 255, fp);
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fputc((afile->rd.rlist[p].lab>>8) & 255, fp);
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}
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if((afl&A_MASK)==A_HIGH) fputc(afl&255,fp);
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}
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p=afile->rd.rlist[p].next;
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}
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fputc(0, fp);
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free(afile->rd.rlist);
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afile->rd.rlist = NULL;
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afile->rd.mlist = afile->rd.nlist = 0;
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afile->rd.first = -1;
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return 0;
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}
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