xtensa: fix _dl_tlsdesc_dynamic

There are multiple errors in _dl_tlsdesc_dynamic:

- the reference C implementation should return pointer to the
  thread-local variable, not offset from the thread pointer, because the
  xtensa ABI expects TLSDESC_FN to return pointer to the TLS variable;
- addx8 used for indexing into dtv has its second and third registers in
  wrong order, the index must be multiplied by 8, not the base;
- the same addx8 uses wrong base: instead of dtv it adds the offset to
  the threadptr;
- the return value in the fast path is calculated as
  td->tlsinfo.ti_offset - __builtin_thread_pointer, not what was
  intended;
- both fast and slow paths should not subtract __builtin_thread_pointer
  from the result.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

0 files changed, 0 insertions, 0 deletions