Re: TLS/NPTL for m68k and ColdFire

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On Wed, 7 May 2008, Richard Zidlicky wrote:

Did you already decide how to do the details of TLS handling and context
switches?

That's for the people implementing the kernel side to decide; the ABI 
specifies the symbol names and versions exported by the vDSO and the 
userspace interfaces to those functions.  The vDSO approach gives a lot of 
freedom for the kernel to select what instruction sequence to put there, 
and it could select one with whatever optimizations you like - though 
anything involving shared pages not changed on context switch could run 
into security issues where a process has access to information it should 
not have access to, or can make changes with adverse effects on another 
process.

-- 
Joseph S. Myers
joseph@xxxxxxxxxxxxxxxx
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