From mboxrd@z Thu Jan  1 00:00:00 1970
From: "John David Anglin" <dave@hiauly1.hia.nrc.ca>
To: gdb-patches@sources.redhat.com
Cc: randolph@tausq.org, cagney@gnu.org
Subject: Re: [patch/rfa] Handle unwinding through export stubs on hpux
Date: Mon, 17 May 2004 18:46:00 -0000
Message-id: <200405171846.i4HIkNmn006792@hiauly1.hia.nrc.ca>
X-SW-Source: 2004-05/msg00500.html

+  if (gdbarch_osabi (gdbarch) == GDB_OSABI_HPUX_ELF 
+      || gdbarch_osabi (gdbarch) == GDB_OSABI_HPUX_SOM)
+    {
+      /* HPUX uses export stubs in function calls; the export stub clobbers
+         the return value of the caller, and, later restores it from the
+        stack.  */
+      u = find_unwind_entry (frame_pc_unwind (next_frame));
+
+      if (u && u->stub_unwind.stub_type == EXPORT)
+       {
+          info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].addr = info->base - 24;

I don't believe that the 64-bit HP-UX runtime uses export stubs which
clobber the return value of the caller.  This is only true for the SOM
runtime.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)