Konstantin Belousov 0cdf4ffabc Add all segment registers for the amd64 CPU to struct reg and mcontext.
To keep these structures ABI-compatible, half the size of r_trapno,
r_err, mc_trapno, mc_flags.

Add fsbase and gsbase to mcontext on both amd64 and i386.
Add flags to amd64 mcontext to indicate that it contains valid segments
or bases.

In collaboration with:	pho
Discussed with:	peter
Reviewed by:	jhb
2009-04-01 12:44:17 +00:00
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