gas: ensure XCOFF DWARF subsection are initialized to 0

debug_abbrev doesn't use end_exp to compute its size. However, it must
be NULL. Otherwise, ppc_xcoff_end might try to access uninitialized
memory.

gas/
	* config/tc-ppc.c (ppc_dwsect): Use XCNEW instead of XNEW when creating
	a new subsection.

diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index 8c3b0a8e7ccbc19c4a730876fb720b0d1cd0dead..1327eabf98d8bc4b80460ca9641f77addc5f66a6 100644 (file)
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -4723,7 +4723,7 @@ ppc_dwsect (int ignore ATTRIBUTE_UNUSED)
   else
     {
       /* Create a new dw subsection.  */
-      subseg = XNEW (struct dw_subsection);
+      subseg = XCNEW (struct dw_subsection);
 
       if (opt_label == NULL)
         {