[PATCH v2 2/4] powerpc64: Set up thread register for _dl_relocate_static_pie

[Tulio Magno Quites Machado Filho]

Alan Modra via Libc-alpha <libc-alpha@sourceware.org> writes:

> libgcc ifunc resolvers that access hwcap via a field in the tcb can't
> be called until the thread pointer is set up.  Other ifunc resolvers
> might need access to at_platform.  This patch sets up a fake thread
> pointer early to a copy of tcbhead_t.  hwcapinfo.c already had local
> variables for hwcap and at_platform, replace them with an entire
> tcbhead_t.  It's not that large and this way we easily ensure hwcap
> and at_platform are at the same relative offsets as they are in the
> real thread block.
>
> The patch also conditionally disables part of tst-tlsifunc-static,
> "bar address read from IFUNC resolver is incorrect".  We can't get a
> proper address for a thread variable before glibc initialises tls.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

-- 
Tulio Magno