runtime: Fixes for Alpha.

From-SVN: r204551

libgo/runtime/mheap.c

@@ -68,6 +68,7 @@ runtime_MHeap_Init(MHeap *h)
 void
 runtime_MHeap_MapSpans(MHeap *h)
 {
+	uintptr pagesize;
 	uintptr n;
 
 	// Map spans array, PageSize at a time.
@@ -76,6 +77,8 @@ runtime_MHeap_MapSpans(MHeap *h)
 		n -= (uintptr)h->arena_start;
 	n = n / PageSize * sizeof(h->spans[0]);
 	n = ROUND(n, PageSize);
+	pagesize = getpagesize();
+	n = ROUND(n, pagesize);
 	if(h->spans_mapped >= n)
 		return;
 	runtime_SysMap((byte*)h->spans + h->spans_mapped, n - h->spans_mapped, &mstats.other_sys);

libgo/runtime/proc.c

@@ -2098,7 +2098,7 @@ runtime_malg(int32 stacksize, byte** ret_stack, size_t* ret_stacksize)
 		__splitstack_block_signals_context(&newg->stack_context[0],
 						   &dont_block_signals, nil);
 #else
-		*ret_stack = runtime_mallocgc(stacksize, FlagNoProfiling|FlagNoGC, 0, 0);
+		*ret_stack = runtime_mallocgc(stacksize, 0, FlagNoProfiling|FlagNoGC);
 		*ret_stacksize = stacksize;
 		newg->gcinitial_sp = *ret_stack;
 		newg->gcstack_size = stacksize;