Re: [Libunwind-devel] ARM building

[Ken Werner]

On 11/02/2011 05:12 PM, Arun Sharma wrote:
> 2011/11/2 Stéphane Régnier<address@hidden>:
>
> > I've also found an upper level library doing what I want,
> > google-breakpad. It has its own unwinder (which work not so bad) but it
> > seems possible to use libunwind instead, I'll take a look on that. But
> > libunwind usage is flagged "still in development", does anybody have
> > already tried to do it ?
>
> Reading through:
>
> http://code.google.com/p/google-breakpad/wiki/SymbolFiles (stack CFI section)
>
> and
>
> http://code.google.com/p/google-breakpad/source/browse/trunk/src/processor/stackwalker_amd64.cc
>
> looks like they reimplemented the libunwind functionality in C++, in
> the process translating DWARF to another interpreted language (stack
> CFI?) to achieve the same outcome.

It seems the code doesn't handle the the ARM specific unwind tables 
(yet?). On Android on ARM for example the ELF binaries usually don't 
have any DWARF CFI but .ARM.exidx and .ARM.extab sections that contain 
the ARM specific unwind info.

Regards
Ken