Re: exp/1155: s/390 Linux: GDB can't reselect the right frame afteran inferior function call

[Andrew Cagney <ac131313 at redhat dot com>]

The following reply was made to PR tdep/1155; it has been noted by GNATS.

From: Andrew Cagney <ac131313 at redhat dot com>
To: Jim Blandy <jimb at redhat dot com>
Cc: gdb-gnats at sources dot redhat dot com, Elena Zannoni <ezannoni at redhat dot com>
Subject: Re: exp/1155: s/390 Linux: GDB can't reselect the right frame after
 an inferior function call
Date: Thu, 27 Mar 2003 16:06:55 -0500

 > No.
 >> 
 >> The problem is that the legacy dummy frame code matches either SP or
 >> FP when trying to re-locate a saved frame.  It should instead match
 >> just a single frame ID.
 >> 
 >> Please see save_dummy_frame_tos() and unwind_dummy_id().
 > 
 > 
 > Are you sure?
 
 Yes.
 
 > I see that save_inferior_status saves the ID of main's frame in
 > inf_status->selected_frame_id, and then restore_inferior_status passes
 > that ID through to restore_selected_frame, which then calls
 > frame_find_by_id, and returns marker1's frame.
 > 
 > The dummy frame is properly popped, and is long gone before any of
 > this happens.  Neither of the two methods you mentioned are involved
 > at all.
 
 Perhaphs that is the problem?
 
 Andrew