reloc fix

xa/misc/ldo65.c

@@ -288,9 +288,13 @@ int main(int argc, char *argv[]) {
 	  file->ddiff =  ((dbase + tdlen) - file->dbase);
 	  file->bdiff =  ((bbase + tblen) - file->bbase);
 	  file->zdiff =  ((zbase + tzlen) - file->zbase);
-/*printf("tbase=%04x, file->tbase=%04x, ttlen=%04x -> tdiff=%04x\n",
-		tbase, file->tbase, ttlen, file->tdiff);*/
 
+/*
+printf("tbase=%04x+len=%04x->%04x, file->tbase=%04x, f.tlen=%04x -> tdiff=%04x\n",
+		tbase, ttlen, (tbase + ttlen), file->tbase, file->tlen, file->tdiff);
+printf("zbase=%04x+len=%04x->%04x, file->zbase=%04x, f.zlen=%04x -> zdiff=%04x\n",
+		zbase, tzlen, (zbase + tzlen), file->zbase, file->zlen, file->zdiff);
+*/
 	  /* update globals (for result file) */
 	  ttlen += file->tlen;
 	  tdlen += file->dlen;
@@ -298,6 +302,38 @@ int main(int argc, char *argv[]) {
 	  tzlen += file->zlen;
 	}
 
+	// validate various situations.
+	{
+		int er = 0;
+		if (tbase + ttlen > 0x10000) {
+			fprintf(stderr, 
+				"Overflow in text segment: end at %06x behind 64k limit\n", 
+				tbase + ttlen);
+			er = 1;
+		}
+		if (dbase + tdlen > 0x10000) {
+			fprintf(stderr, 
+				"Overflow in data segment: end at %06x behind 64k limit\n", 
+				dbase + tdlen);
+			er = 1;
+		}
+		if (bbase + tblen > 0x10000) {
+			fprintf(stderr, 
+				"Overflow in bss segment: end at %06x behind 64k limit\n", 
+				bbase + tblen);
+			er = 1;
+		}
+		if (zbase + tzlen > 0x100) {
+			fprintf(stderr, 
+				"Overflow in zero segment: end at %04x behind 256 byte limit\n", 
+				zbase + tzlen);
+			er = 1;
+		}
+		if (er) {
+			exit (1);
+		}
+	}
+
 	// -------------------------------------------------------------------------
 	// step 3 - merge globals from all files into single table
 	//
@@ -710,7 +746,7 @@ file65 *load_file(char *fname) {
 	      file->bbase = file->buf[17]*256+file->buf[16];
 	      file->blen  = file->buf[19]*256+file->buf[18];
 	      file->zbase = file->buf[21]*256+file->buf[20];
-	      file->zlen  = file->buf[23]*256+file->buf[21];
+	      file->zlen  = file->buf[23]*256+file->buf[22];
 
 	      file->tpos = hlen;
 	      file->dpos = hlen + file->tlen;
@@ -1056,10 +1092,6 @@ printf("found undef'd label %s, resolved=%d, newidx=%d, (ri=%d, ro=%d)\n", u->na
 			ri += 4;// account for position, segment byte, label number in reloc table
 		}
 		new = old + diff;
-		if (((diff & 0xff) + (old & 0xff)) > 0xff) {
-			fprintf(stderr,"Warning: overflow in byte relocation at %04x in file %s\n",
-				pos, fp->fname);
-		}
 		buf[addr-base+pos] = new & 255;
 		break;
 	    }

xa/tests/ldoreloc/60.s

@@ -0,0 +1,13 @@
+
+	.zero
+ptr	.word 0
+	.text
+
+foo	=$1234
+
+	lda ptr2 
+loop: 	jmp loop
+
+	.data
+bar	.word bla
+

xa/tests/ldoreloc/61.s

@@ -0,0 +1,15 @@
+	jsr loop 
+bla: 	lda ptr
+	lda #ptr
+
+	.zero
+ptr2	.byt 0
+
+	.data
+
+	.word foo
+	.word bar
+	.byte <foo
+	.byte >foo
+
+

xa/tests/ldoreloc/Makefile

@@ -1,6 +1,6 @@
 
 default: all
-all: t1 t2 t10 t11 t20 t21 t30 t31 t40 t41 t50 t51
+all: t1 t2 t10 t11 t20 t21 t30 t31 t40 t41 t50 t51 t60 t61 t62
 
 %.o65: %.s
 	../../xa -R -c -o $@ $<
@@ -47,6 +47,15 @@ linked50.o65: 50.o65 51.o65
 linked51.o65: 50.o65 51.o65
 	../../ldo65 -o $@ 51.o65 50.o65
 
+linked60.o65: 60.o65 61.o65
+	../../ldo65 -o $@ 60.o65 61.o65
+
+linked61.o65: 60.o65 61.o65
+	../../ldo65 -o $@ 61.o65 60.o65
+
+linked62.o65: 60.o65 61.o65
+	../../ldo65 -bd 65529 -bt 65523 -bz 255 -o $@ 61.o65 60.o65 && exit 1 || exit 0
+
 t1: linked.o65
 	../../reloc65 -bt 32768 -xt -o $@ $<
 	../hextool $@ > $@.hex
@@ -110,6 +119,18 @@ t51: linked51.o65
 	../hextool $@ > $@.hex
 	../hextool -cmp=$@ < t51.ok
 
-clean:
+t60: linked60.o65
-	rm -f *.o65 *.hex t1 t2 t10 t11 t20 t21 t30 t31 t40 t41 t50 t51
+	../../reloc65 -bt 32768 -bd 40960 -o $@ $<
+	../hextool $@ > $@.hex
+	../hextool -cmp=$@ < t60.ok
+
+t61: linked61.o65
+	../../reloc65 -bt 32768 -bd 40960 -o $@ $<
+	../hextool $@ > $@.hex
+	../hextool -cmp=$@ < t61.ok
+
+t62: linked62.o65
+
+clean:
+	rm -f *.o65 *.hex t1 t2 t10 t11 t20 t21 t30 t31 t40 t41 t50 t51 t60 t61