[PATCH] PowerPC: use libgcc _Unwind functions to get backtrace

[Joseph S. Myers]

On Tue, 23 Jul 2013, Adhemerval Zanella wrote:

> Main difference about this patch from previous is I have fixed the
> __vdso_sigtramp_rt32 handling for PPC32 and also change the backtrace5
> testcase to actually test it.

In general, I think changing what an existing test tests like that is a 
bad idea - it's better to add a new test (which could #include the 
previous one with a suitable #define) instead.  But in any case, adding 
new tests or changing existing tests with a risk of introducing 
architecture-specific failures will need to wait until after 2.18 
branches.

-- 
Joseph S. Myers
joseph@codesourcery.com