Remove unused code that's confusing when using cscope/opengrok.

branches: 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.32;
Merge the nathanw_sa branch.

branches: 1.1.2;
file _context_u.S was initially added on branch nathanw_sa.

Remove unused code that's confusing when using cscope/opengrok.

Remove the PTHREAD_SA option. If M:N threads is reimplemented it's
better off done with a seperate library.

Remove possible race condition in upcall recycling.

Remove PT_SLEEPUC, which somehow wasn't.

Adapt to structure name changes.

Remove PT_SLEEPUC and add PT_TRAPUC.

Include <sys/types.h>
Remove v9 register defs.

Merge the nathanw_sa branch.

branches: 1.1.2;
file genassym.cf was initially added on branch nathanw_sa.

make pthread__sp unsigned long.

branches: 1.7.2;
Remove unused code that's confusing when using cscope/opengrok.

branches: 1.6.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.5.4;
- Remove libpthread's atomic ops.
- Remove the old spinlock-based mutex and rwlock implementations.
- Use the atomic ops from libc.

branches: 1.4.12;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

All the ucontext <-> {fp}reg macros were slightly simplistic and untested
before (old gdb support on sparc did not use this).
Pointed out by Christian Limpach.

Merge the nathanw_sa branch.

branches: 1.1.2;
file pthread_md.h was initially added on branch nathanw_sa.

Remove the PTHREAD_SA option. If M:N threads is reimplemented it's
better off done with a seperate library.

A couple of fixes to make libpthread really shared, i.e. not have text re-
locations:

- Don't declare pthread__switch_away global
- Do the PIC dance for pthread__switch_return_point and
pthread__locked_switch. Ideally these (and other) symbols would
be hidden.

Thanks to uwe@, dyoung@ and elad@ for help.

XXX sh3 is still to be done.
XXX vax does strange things.

branches: 1.7.6;
Remove possible race condition in upcall recycling.

Use delay slot in STACK_SWITCH (catching up with sparc64 changes).

Use correct context to switch to.
From sparc64 fix by Andrey Petrov <petrov@netbsd>.

Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc
and use it preferentially to a value in pt_uc, clearing it once on the new
stack. Move stores into pt_uc back to before the stack switch; storing
after the stack switch opened a one-instruction race condition where an upcall
that had just started a chain could be preempted again, and would bomb when
restarted due to its pt_uc not yet having been updated. Now that pt_trapuc
is what the upcall code writes to, it is safe to store to pt_uc before
switching stacks.

Remove obsolete pt_sleepuc code.

Catch up with Nathan's changes to other archs.

Merge the nathanw_sa branch.

branches: 1.1.2;
file pthread_switch.S was initially added on branch nathanw_sa.