Move the call to extend_heap() from main to start so that if our BSS

expands beyond the limit we will extend the address space before trying
to zero the BSS. This should give us plenty of headroom for modest
expansion of the loader.

sys/boot/alpha/common/main.c

@@ -66,8 +66,8 @@ memsize()
 /* #define	XTRA_PAGES	32 */
 #define	XTRA_PAGES	64
 
-static void
-extend_heap()
+void
+extend_heap(void)
 {
     struct rpb *hwrpb = (struct rpb *)HWRPB_ADDR;
     struct mddt *mddtp;
@@ -119,7 +119,6 @@ main(void)
      * alloc() is usable. The stack is buried inside us, so this is
      * safe.
      */
-    extend_heap();
     setheap((void *)end, (void *)(0x20040000 + XTRA_PAGES * 8192));
 
 #ifdef	LOADER

sys/boot/alpha/libalpha/start.S

@@ -52,6 +52,10 @@ NESTED(start, 1, ENTRY_FRAME, ra, 0, 0)
 Lstartgp:
 	LDGP(pv)
 
+#ifndef BOOT1
+	CALL(extend_heap)
+#endif
+	
 	lda	a0,_edata
 	lda	a1,_end
 	subq	a1,a0,a1