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[Bug libc/6816] Support for POWER7 VSX registers in *context routines


------- Additional Comments From drepper at redhat dot com  2008-10-15 22:22 -------
I've asked this before but I don't remember getting a reply.

On x86/x86-64 the additional registers are not preserved in function calls. 
This means the context functions don't have to handle the registers.  The kernel
still provides the register content to signal handlers but that's a different story.

Why has the decision been made that the registers have to be saved (assuming
they are, otherwise the whole extension business is mood)?

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http://sourceware.org/bugzilla/show_bug.cgi?id=6816

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