Add more tests for unionized sections + fix bugs

Implementing those tests found a few bugs... oops

src/asm/section.c

@@ -155,6 +155,10 @@ static struct Section *getSection(char const *pzName, enum SectionType type,
 				if (pSect->nOrg != -1 && pSect->nOrg != org)
 					fail("Section \"%s\" already declared as fixed at different address $%x",
 					     pSect->pzName, pSect->nOrg);
+				else if (pSect->nAlign != 0
+				      && ((pSect->nAlign - 1) & org))
+					fail("Section \"%s\" already declared as aligned to %u bytes",
+					     pSect->pzName, pSect->nAlign);
 				else
 					/* Otherwise, just override */
 					pSect->nOrg = org;
@@ -207,7 +211,7 @@ static struct Section *getSection(char const *pzName, enum SectionType type,
 					fail("Section \"%s\" already declared as unaligned",
 					     pSect->pzName);
 				else
-					fail("Section \"%s\" already declared as aligned to %u bits",
+					fail("Section \"%s\" already declared as aligned to %u bytes",
 					     pSect->pzName, pSect->nAlign);
 			}
 		}

src/link/section.c

@@ -38,6 +38,10 @@ void sect_ForEach(void (*callback)(struct Section *, void *), void *arg)
 
 static void mergeSections(struct Section *target, struct Section *other)
 {
+	if (target->type != other->type)
+		errx(1, "Section \"%s\" is defined with conflicting types %s and %s",
+		     other->name,
+		     typeNames[target->type], typeNames[other->type]);
 	if (other->isAddressFixed) {
 		if (target->isAddressFixed) {
 			if (target->org != other->org)

test/asm/section-union.err

@@ -3,6 +3,6 @@ ERROR: section-union.asm(37):
 ERROR: section-union.asm(37):
     Section "test" already declared as fixed at $c000
 ERROR: section-union.asm(37):
-    Section "test" already declared as aligned to 256 bits
+    Section "test" already declared as aligned to 256 bytes
 ERROR: section-union.asm(37):
     Cannot create section "test" (3 errors)

test/link/section-union/align-conflict.asm

@@ -0,0 +1,10 @@
+IF !DEF(SECOND)
+ATTRS equs ",ALIGN[2]"
+ELSE
+ATTRS equs "[$CAFE]"
+ENDC
+
+SECTION UNION "conflicting alignment", WRAM0 ATTRS
+	db
+
+	PURGE ATTRS

test/link/section-union/align-conflict.out

@@ -0,0 +1,6 @@
+error: Section "conflicting alignment" is defined with conflicting 4-byte alignment and address $cafe
+---
+ERROR: -(18):
+    Section "conflicting alignment" already declared as aligned to 4 bytes
+ERROR: -(18):
+    Cannot create section "conflicting alignment" (1 errors)

test/link/section-union/bad-types.asm

@@ -0,0 +1,10 @@
+IF !DEF(SECOND)
+TYPE equs "HRAM"
+ELSE
+TYPE equs "WRAM0"
+ENDC
+
+SECTION UNION "conflicting types", TYPE
+	db
+
+	PURGE TYPE

test/link/section-union/bad-types.out

@@ -0,0 +1,6 @@
+error: Section "conflicting types" is defined with conflicting types HRAM and WRAM0
+---
+ERROR: -(18):
+    Section "conflicting types" already exists but with type HRAM
+ERROR: -(18):
+    Cannot create section "conflicting types" (1 errors)

test/link/section-union/bank-conflict.asm

@@ -0,0 +1,8 @@
+IF !DEF(SECOND)
+SECOND equs "4"
+ENDC
+
+SECTION UNION "conflicting banks", WRAMX, BANK[SECOND]
+	db
+
+	PURGE SECOND

test/link/section-union/bank-conflict.out

@@ -0,0 +1,6 @@
+error: Section "conflicting banks" is defined with conflicting banks 4 and 1
+---
+ERROR: -(14):
+    Section "conflicting banks" already declared with different bank 4
+ERROR: -(14):
+    Cannot create section "conflicting banks" (1 errors)

test/link/section-union/data-overlay.asm

@@ -0,0 +1,10 @@
+IF !DEF(SECOND)
+DATA equs "ds 4"
+ELSE
+DATA equs "db $aa, $bb, $cc, $dd"
+ENDC
+
+SECTION UNION "overlaid data", ROM0
+	DATA
+
+	PURGE DATA

test/link/section-union/data-overlay.out

@@ -0,0 +1,6 @@
+error: Section "overlaid data" is of type ROM0, which cannot be unionized
+---
+ERROR: -(18):
+    Cannot declare ROM sections as UNION
+ERROR: -(18):
+    Cannot create section "overlaid data" (1 errors)

test/link/section-union/different-data.asm

@@ -0,0 +1,8 @@
+IF !DEF(SECOND)
+DATA = 1
+ELSE
+DATA = 2
+ENDC
+
+SECTION UNION "different data", ROM0
+	db DATA

test/link/section-union/different-data.out

@@ -0,0 +1,6 @@
+error: Section "different data" is of type ROM0, which cannot be unionized
+---
+ERROR: -(16):
+    Cannot declare ROM sections as UNION
+ERROR: -(16):
+    Cannot create section "different data" (1 errors)

test/link/section-union/different-size.asm

@@ -0,0 +1,8 @@
+IF !DEF(SECOND)
+SIZE = 69
+ELSE
+SIZE = 420
+ENDC
+
+SECTION UNION "different section sizes", ROM0
+	ds SIZE

test/link/section-union/different-size.out

@@ -0,0 +1,6 @@
+error: Section "different section sizes" is of type ROM0, which cannot be unionized
+---
+ERROR: -(16):
+    Cannot declare ROM sections as UNION
+ERROR: -(16):
+    Cannot create section "different section sizes" (1 errors)

test/link/section-union/different-syntaxes.asm

@@ -0,0 +1,10 @@
+IF !DEF(SECOND)
+INSTR equs "sbc a"
+ELSE
+INSTR equs "db $9f"
+ENDC
+
+SECTION UNION "different syntaxes", ROM0
+	INSTR
+
+	PURGE INSTR

test/link/section-union/different-syntaxes.out

@@ -0,0 +1,6 @@
+error: Section "different syntaxes" is of type ROM0, which cannot be unionized
+---
+ERROR: -(18):
+    Cannot declare ROM sections as UNION
+ERROR: -(18):
+    Cannot create section "different syntaxes" (1 errors)

test/link/section-union/no-room.asm

@@ -0,0 +1,12 @@
+; NB: the error is that there is no room to place the unionized section in,
+;     so RGBASM can't possibly error out.
+IF !DEF(SECOND)
+	SECTION "bloat", WRAMX[$d000], BANK[2]
+		ds $fe0
+
+	SECTION UNION "test", WRAMX, BANK[2]
+		db
+ELSE
+	SECTION UNION "test", WRAMX, ALIGN[6]
+		db
+ENDC

test/link/section-union/no-room.out

@@ -0,0 +1,2 @@
+error: Unable to place "test" (WRAMX section) in bank $02 with align mask ffffffc0
+---

test/link/section-union/org-conflict.asm

@@ -0,0 +1,8 @@
+IF !DEF(SECOND)
+ADDR = $BEEF
+ELSE
+ADDR = $BABE
+ENDC
+
+SECTION UNION "conflicting address", SRAM[ADDR]
+	db

test/link/section-union/org-conflict.out

@@ -0,0 +1,6 @@
+error: Section "conflicting address" is defined with conflicting addresses $beef and $babe
+---
+ERROR: -(16):
+    Section "conflicting address" already declared as fixed at different address $beef
+ERROR: -(16):
+    Cannot create section "conflicting address" (1 errors)

test/link/section-union/split-data.asm

@@ -0,0 +1,10 @@
+IF !DEF(SECOND)
+DATA equs "ds 1\ndb $aa"
+ELSE
+DATA equs "db $bb\nds 1"
+ENDC
+
+SECTION UNION "mutually-overlaid data", ROM0
+	DATA
+
+	PURGE DATA

test/link/section-union/split-data.out

@@ -0,0 +1,6 @@
+error: Section "mutually-overlaid data" is of type ROM0, which cannot be unionized
+---
+ERROR: -(18):
+    Cannot declare ROM sections as UNION
+ERROR: -(18):
+    Cannot create section "mutually-overlaid data" (1 errors)

test/link/test.sh

@@ -80,12 +80,25 @@ $RGBLINK -o $gbtemp2 $otemp
 i="high-low.asm" tryCmp $gbtemp $gbtemp2
 rc=$(($? || $rc))
 
-$RGBASM -o $otemp section-union/a.asm
-$RGBASM -o $gbtemp2 section-union/b.asm
-$RGBLINK -o $gbtemp -l section-union/script.link $otemp $gbtemp2
-dd if=$gbtemp count=1 bs=$(printf %s $(wc -c < section-union/ref.out.bin)) > $otemp 2>/dev/null
-i="section-union.asm" tryCmp section-union/ref.out.bin $otemp
+$RGBASM -o $otemp section-union/good/a.asm
+$RGBASM -o $gbtemp2 section-union/good/b.asm
+$RGBLINK -o $gbtemp -l section-union/good/script.link $otemp $gbtemp2
+dd if=$gbtemp count=1 bs=$(printf %s $(wc -c < section-union/good/ref.out.bin)) > $otemp 2>/dev/null
+i="section-union.asm" tryCmp section-union/good/ref.out.bin $otemp
 rc=$(($? || $rc))
+for i in section-union/*.asm; do
+	$RGBASM -o $otemp   $i
+	$RGBASM -o $gbtemp2 $i -DSECOND
+	if $RGBLINK $otemp $gbtemp2 > $outtemp 2>&1; then
+		echo -e "${bold}${red}$i didn't fail to link!${rescolors}${resbold}"
+		rc=1
+	fi
+	echo --- >> $outtemp
+	# Ensure RGBASM also errors out
+	echo 'SECOND equs "1"' | cat $i - $i | $RGBASM - 2>> $outtemp
+	tryDiff ${i%.asm}.out $outtemp
+	rc=$(($? || $rc))
+done
 
 rm -f $otemp $gbtemp $gbtemp2 $outtemp
 exit $rc