outobj: disallow the combination of USE16(16-bit segment) and FLAT

komh · hpax · commit 05343069faf5 · 2025-10-03T10:27:39.000-07:00
FLAT should be used only with USE32(32-bit segment).

Signed-off-by: KO Myung-Hun &lt;komh78@gmail.com&gt;
diff --git a/output/outobj.c b/output/outobj.c
@@ -1492,6 +1492,9 @@ static int32_t obj_segment(char *name, int *bits)
             }
         }
 
+        if (!seg->use32 && seg->grp && !strcmp(seg->grp->name, "FLAT"))
+           nasm_panic("wrong combination of USE16(16-bit segment) and FLAT");
+
         /* We need to know whenever we have at least one 32-bit segment */
         obj_use32 |= seg->use32;
 

Original file line number	Diff line number	Diff line change
`@@ -1492,6 +1492,9 @@ static int32_t obj_segment(char name, int bits)`
`1492`	`1492`	`}`
`1493`	`1493`	`}`
`1494`	`1494`
	`1495`	`+ if (!seg->use32 && seg->grp && !strcmp(seg->grp->name, "FLAT"))`
	`1496`	`+ nasm_panic("wrong combination of USE16(16-bit segment) and FLAT");`
	`1497`	`+`
`1495`	`1498`	`/* We need to know whenever we have at least one 32-bit segment */`
`1496`	`1499`	`obj_use32 \|= seg->use32;`
`1497`	`1500`