[PATCH] Retrieval of TLS pointer via RDHWR
rmh at debian.org
Tue Dec 28 11:36:48 UTC 2010
Note this might become mandatory if you ever want to compile
code that uses TLS with recent GCC.
In any case, when executed natively, rdhwr is a speed-up
compared to a sysarch() call.
2010/12/9 Robert Millan <rmh at debian.org>:
> 2010/12/9 Jayachandran C. <jchandra at freebsd.org>:
>> I'm not sure that the freebsd mips toolchain supports the __thread
>> directive yet. Were you able to test this from C?
> Yes, but not via __thread. I wrote a small program that sets
> the TLS pointer to an arbitrary value (via MIPS_SET_TLS),
> then issued rdhwr instruction using C inline assembly, and
> finally verified that both values are the same.
> (the toolchain I'm using doesn't support __thread either,
> but I submit this patch with the expectation that it can be
> useful later on)
> Robert Millan
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