David Xu a30ec4b99c Make sigaltstack as per-threaded, because per-process sigaltstack state ... is useless for threaded programs, multiple threads can not share same stack. The alternative signal stack is private for thread, no lock is needed, the orignal P_ALTSTACK is now moved into td_pflags and renamed to TDP_ALTSTACK. For single thread or Linux clone() based threaded program, there is no semantic changed, because those programs only have one kernel thread in every process. Reviewed by: deischen, dfr		2004-01-03 02:02:26 +00:00
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apm	Merge PC98 support.	2003-03-25 05:19:18 +00:00
cbus	Add detach method.	2003-12-28 12:25:49 +00:00
compile	Don't need the .keep_me files. Obrien and I committed past each other.	2001-07-01 23:35:44 +00:00
conf	Garbage-collected CLK_USE_TSC_CALIBRATION.	2003-12-30 07:28:54 +00:00
i386	Make sigaltstack as per-threaded, because per-process sigaltstack state	2004-01-03 02:02:26 +00:00
pc98	Make sigaltstack as per-threaded, because per-process sigaltstack state	2004-01-03 02:02:26 +00:00