[patch/rfa] Handle unwinding through export stubs on hpux

[John David Anglin]

+  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)