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Date: Fri, 24 Jan 2003 07:32:00 -0000
From: Jeff Sturm <jsturm@one-point.com>
To: Geert Bosch <bosch@gnat.com>
cc: gcc@gcc.gnu.org
Subject: Re: Unwinding on Sparc/Solaris: MD_FALLBACK_FRAME_STATE_FOR
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On Thu, 23 Jan 2003, Geert Bosch wrote:
> I am trying to get GCC to correctly unwind through
> SPARC/Solaris signal frames. When the GCC unwinder encounters
> a frame without unwind info, it will execute the code
> given by the MD_FALLBACK_FRAME_STATE_FOR macro, which
> is not defined yet.

Aside from signal frames, I wonder if there's not enough information
in SPARC register windows to unwind anyway.  The unwinder will always see
a DW_CFA_GNU_window_save instruction if the FDE is found.  Maybe
MD_FALLBACK_FRAME_STATE_FOR could proceed assuming the window_save area is
present, and not worry about decoding signal frames.

Also look at what's done in libjava/include/sparc-signal.h.

Jeff