* linux-proc.c (struct linux_corefile_thread_data): Add num_notes

member.
(linux_corefile_thread_callback): Increase args->num_notes.
(linux_make_note_section): Initialize thread_args.num_notes, and
use it to determine whether notes for any threads were created.

gdb/ChangeLog

@@ -1,3 +1,11 @@
+2002-08-23  Mark Kettenis  <kettenis@gnu.org>
+
+	* linux-proc.c (struct linux_corefile_thread_data): Add num_notes
+	member.
+	(linux_corefile_thread_callback): Increase args->num_notes.
+	(linux_make_note_section): Initialize thread_args.num_notes, and
+	use it to determine whether notes for any threads were created.
+
 2002-08-23  Donn Terry  <dterry@microsoft.com>
 
 	* proc-api.c (rw_table): Do not include a row for PCDSTOP if the

gdb/linux-proc.c

@@ -198,10 +198,12 @@ linux_do_thread_registers (bfd *obfd, ptid_t ptid,
   return note_data;
 }
 
-struct linux_corefile_thread_data {
+struct linux_corefile_thread_data
+{
   bfd *obfd;
   char *note_data;
   int *note_size;
+  int num_notes;
 };
 
 /* Function: linux_corefile_thread_callback
@@ -224,6 +226,7 @@ linux_corefile_thread_callback (struct thread_info *ti, void *data)
 					       ti->ptid, 
 					       args->note_data, 
 					       args->note_size);
+  args->num_notes++;
   inferior_ptid = saved_ptid;
   registers_changed ();
   target_fetch_registers (-1);	/* FIXME should not be necessary; 
@@ -271,8 +274,9 @@ linux_make_note_section (bfd *obfd, int *note_size)
   thread_args.obfd = obfd;
   thread_args.note_data = note_data;
   thread_args.note_size = note_size;
+  thread_args.num_notes = 0;
   iterate_over_threads (linux_corefile_thread_callback, &thread_args);
-  if (thread_args.note_data == note_data)
+  if (thread_args.num_notes == 0)
     {
       /* iterate_over_threads didn't come up with any threads;
 	 just use inferior_ptid.  */