Re: [Libunwind-devel] [PATCH 4/6] [ARM] Add support for systems that don't support ucontext.h

[Ken Werner]

On 10/27/2011 05:58 PM, Arun Sharma wrote:
> On Thu, Oct 27, 2011 at 1:38 AM, Ken Werner<address@hidden>  wrote:
> > Define unw_tdep_context rather than using ucontext_t in order to support
> > systems that lack ucontext.h. Note that POSIX.1-2008 removed getcontext,
> > makecontext and swapcontext from its specification.
>
> Why not provide a compatible definition of ucontext_t for platforms
> that don't define it?

Hi Arun,

The only fields of ucontext_t that libunwind on ARM is using are the 
sixteen registers provided by mcontext_t. We could define our own 
ucontext_t (which is what I did as a workaround actually) but why should 
libunwind rely on a structure that is only used by functions  marked as 
obsolete?

Regards
Ken