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Re: [Libunwind-devel] status of ARM support

From: Sven Neumann
Subject: Re: [Libunwind-devel] status of ARM support
Date: Mon, 02 Aug 2010 17:01:02 +0200

On Mon, 2010-08-02 at 13:47 +0200, address@hidden wrote:
> On 2010-08-02 14:20, Sven Neumann wrote:
> > I've tried that now, unfortunately without much success. Here's the
> > output from a simple test application with debug output enabled. As you
> > can see, dwarf_step() fails and then the code crashes in the alternative
> > approach using the frame chain:
> > ....
> >   >_ULarm_step: dwarf_step() failed (ret=0), trying
> > frame-chain
> > caught signal 11
> It's strange that dwarf_step() failed, less strange that frame-chain
> unwinding could fail. What options did you use to compile your test
> program? IIRC frame chain unwinding requires -fno-omit-frame-pointer and
> -mapcs-frame options enabled.

I didn't add these extra options, and of course I would prefer if I
wouldn't have to. So far I have tried to add -funwind-tables, but that
did not seem to help with dwarf_step().

The compiler options in use at the moment are

-mtune=iwmmxt -march=iwmmxt -mabi=aapcs-linux -msoft-float
-O2 -pipe -funwind-tables


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