PR27101, as: Reject (byte) .align 0x100000000

This allows alignments up to 2**TC_ALIGN_LIMIT, which might be larger
than an unsigned int can hold.

	PR 27101
	* read.c (s_align): Use a large enough type for "align" to hold
	the result of get_absolute_expression.

gas/ChangeLog

@@ -1,3 +1,9 @@
+2021-01-04  Alan Modra  <amodra@gmail.com>
+
+	PR 27101
+	* read.c (s_align): Use a large enough type for "align" to hold
+	the result of get_absolute_expression.
+
 2021-01-01  Nicolas Boulenguez  <nicolas@debian.org>
 
 	* config/tc-i386.c: Correct comment spelling.

gas/read.c

@@ -1548,7 +1548,7 @@ static void
 s_align (signed int arg, int bytes_p)
 {
   unsigned int align_limit = TC_ALIGN_LIMIT;
-  unsigned int align;
+  addressT align;
   char *stop = NULL;
   char stopc = 0;
   offsetT fill = 0;
@@ -1595,7 +1595,7 @@ s_align (signed int arg, int bytes_p)
   if (align > align_limit)
     {
       align = align_limit;
-      as_warn (_("alignment too large: %u assumed"), align);
+      as_warn (_("alignment too large: %u assumed"), align_limit);
     }
 
   if (*input_line_pointer != ',')