dw2gencfi.c: use notes obstack

[Alan Modra]

Use notes obstack for dwcfi_hash entries, and free table.  Freeing the
table makes memory checkers complain more about "definitely lost"
memory as we've moved some from the "still reachable" category.
That will be fixed with a later patch.

	* dw2gencfi.c (get_debugseg_name): Allocate on notes obstack.
	(alloc_debugseg_item): Likewise.
	(dwcfi_hash_find_or_make): Adjust failure path free.
	(cfi_finish): Delete dwfci_hash.

diff --git a/gas/dw2gencfi.c b/gas/dw2gencfi.c
index 961a3b92188..6be8cb50495 100644
--- a/gas/dw2gencfi.c
+++ b/gas/dw2gencfi.c
@@ -229,13 +229,10 @@ get_debugseg_name (segT seg, const char *base_name)
   const char * dollar;
   const char * dot;
 
-  if (!seg)
-    return concat (base_name, NULL);
-
-  name = bfd_section_name (seg);
-
-  if (name == NULL || *name == 0)
-    return concat (base_name, NULL);
+  if (!seg
+      || (name = bfd_section_name (seg)) == NULL
+      || *name == 0)
+    return notes_strdup (base_name);
 	
   dollar = strchr (name, '$');
   dot = strchr (name + 1, '.');
@@ -244,7 +241,7 @@ get_debugseg_name (segT seg, const char *base_name)
     {
       if (!strcmp (base_name, ".eh_frame_entry")
 	  && strcmp (name, ".text") != 0)
-	return concat (base_name, ".", name, NULL);
+	return notes_concat (base_name, ".", name, NULL);
 
       name = "";
     }
@@ -257,7 +254,7 @@ get_debugseg_name (segT seg, const char *base_name)
   else
     name = dollar;
 
-  return concat (base_name, name, NULL);
+  return notes_concat (base_name, name, NULL);
 }
 
 /* Allocate a dwcfi_seg_list structure.  */
@@ -267,8 +264,7 @@ alloc_debugseg_item (segT seg, int subseg, char *name)
 {
   struct dwcfi_seg_list *r;
 
-  r = (struct dwcfi_seg_list *)
-    xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name));
+  r = notes_alloc (sizeof (*r) + strlen (name));
   r->seg = seg;
   r->subseg = subseg;
   r->seg_name = name;
@@ -351,7 +347,7 @@ dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags)
       str_hash_insert (dwcfi_hash, item->seg_name, item, 0);
     }
   else
-    free (name);
+    notes_free (name);
 
   return item;
 }
@@ -2542,6 +2538,8 @@ cfi_finish (void)
 	for (fde = all_fde_data; fde ; fde = fde->next)
 	  SET_HANDLED (fde, 0);
     }
+  if (dwcfi_hash)
+    htab_delete (dwcfi_hash);
 }
 
 #else /* TARGET_USE_CFIPOP */

-- 
Alan Modra
Australia Development Lab, IBM