gdb/

        * frame.c (get_frame_id): Default to outer_frame_id if the this_id
        method does not supply an ID.  Assert that the result is not
        null_frame_id.
        (outer_frame_id): New.
        (frame_id_p): Accept outer_frame_id.
        (frame_id_eq): Allow outer_frame_id to be equal to itself.
        (frame_find_by_id): Revert previous local workarounds.
        (get_prev_frame_1): Adjust end-of-stack check to test outer_frame_id.
        * frame.h (null_frame_id, frame_id_p): Update comments.
        (outer_frame_id): Declare.
        * infrun.c (handle_inferior_event): Do not treat all steps from the
        outermost frame as subroutine calls.

        * libunwind-frame.c (libunwind_frame_this_id): Do not clear THIS_ID.
        * hppa-tdep.c (hppa_stub_frame_this_id): Likewise.
        * ia64-tdep.c (ia64_frame_this_id): Likewise.
        (ia64_libunwind_frame_this_id, ia64_libunwind_sigtramp_frame_this_id):
        Use outer_frame_id instead of null_frame_id.
        * amd64obsd-tdep.c (amd64obsd_trapframe_cache): Use outer_frame_id.
        * i386obsd-tdep.c (i386obsd_trapframe_cache): Likewise.
        * inline-frame.c (inline_frame_this_id): Refuse outer_frame_id.
        * thread.c (restore_selected_frame): Update comment and remove
        frame_id_p check.

        gdb/doc/
        * gdbint.texinfo (Unwinding the Frame ID): Reference outer_frame_id.

1 files changed, 7 insertions, 10 deletions

diff --git a/gdb/ia64-tdep.c b/gdb/ia64-tdep.c
index bc72e40..674204a 100644
--- a/gdb/ia64-tdep.c
+++ b/gdb/ia64-tdep.c
@@ -1774,9 +1774,7 @@ ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
     ia64_frame_cache (this_frame, this_cache);
 
   /* If outermost frame, mark with null frame id.  */
-  if (cache->base == 0)
-    (*this_id) = null_frame_id;
-  else
+  if (cache->base != 0)
     (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
   if (gdbarch_debug >= 1)
     fprintf_unfiltered (gdb_stdlog,
@@ -2790,15 +2788,14 @@ ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
 {
   struct gdbarch *gdbarch = get_frame_arch (this_frame);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  struct frame_id id;
+  struct frame_id id = outer_frame_id;
   char buf[8];
   CORE_ADDR bsp;
 
-
   libunwind_frame_this_id (this_frame, this_cache, &id);
-  if (frame_id_eq (id, null_frame_id))
+  if (frame_id_eq (id, outer_frame_id))
     {
-      (*this_id) = null_frame_id;
+      (*this_id) = outer_frame_id;
       return;
     }
 
@@ -2923,13 +2920,13 @@ ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   char buf[8];
   CORE_ADDR bsp;
-  struct frame_id id;
+  struct frame_id id = outer_frame_id;
   CORE_ADDR prev_ip;
 
   libunwind_frame_this_id (this_frame, this_cache, &id);
-  if (frame_id_eq (id, null_frame_id))
+  if (frame_id_eq (id, outer_frame_id))
     {
-      (*this_id) = null_frame_id;
+      (*this_id) = outer_frame_id;
       return;
     }