Commit Graph

91 Commits

Author SHA1 Message Date
Marcel Moolenaar
9a3ea63e79 Define THR_GETCONTEXT and THR_SETCONTEXT in terms of the userland
context functions. We don't need to enter the kernel anymore. The
contexts are compatible (ie a context created by getcontext() can
be restored by _ia64_restore_context()).

While here, make the use of THR_ALIGNBYTES and THR_ALIGN a no-op.
They are going to be removed anyway.
2003-08-05 19:37:20 +00:00
Marcel Moolenaar
50be3a75cc o In _ia64_save_context() clear the return registers except for r8.
We write 1 for r8 in the context so that _ia64_restore_context()
   will return with a non-zero value. _ia64_save_context() always
   return 0.
o  In _ia64_restore_context(), don't restore the thread pointer. It
   is not normally part of the context. Also, restore the return
   registers. We get called for contexts created by getcontext(),
   which means we have to restore all the syscall return values.
2003-08-05 19:33:01 +00:00
David Xu
3664d35cd5 -15 is incorrect to be used to align stack to 16 bytes, use ~15 instead. 2003-08-02 22:39:10 +00:00
David Xu
e6145501e9 Use FSBase to map kse, GCC generates code which uses %fs to access TLS data.
Reminded by: marcel
2003-07-31 22:06:36 +00:00
Daniel Eischen
9c76f2b9d6 This file hasn't been used for some time; nuke it. 2003-07-31 21:29:04 +00:00
Daniel Eischen
51200f9b7c Take the same approach for i386 as that for ia64 and amd64. Use
the userland version of [gs]etcontext to switch between a thread
and the UTS scheduler (and back again).  This also fixes a bug
in i386 _thr_setcontext() which wasn't properly restoring the
context.

Reviewed by:	davidxu
2003-07-31 21:09:11 +00:00
David Xu
ee2d44af05 Set GSBASE for kse. Finally make libkse work on AMD64. 2003-07-31 09:03:36 +00:00
David Xu
3807b4840c Fix some typos, correctly jump into UTS. 2003-07-31 08:50:01 +00:00
David Xu
36144f1e6e Fix typo. 2003-07-26 02:36:50 +00:00
Daniel Eischen
f4c57e7baf Add missing arguments to _amd64_restore_context() when called from
THR_SETCONTEXT().
2003-07-20 12:41:38 +00:00
Daniel Eischen
5a201fddb7 Add some very beta amd64 bits. These will also need some tweaking. 2003-07-19 04:44:21 +00:00
Daniel Eischen
584a5a068d Clean up KSE specific data (KSD) macros a bit.
Reviewed by:	davidxu
2003-07-18 02:45:56 +00:00
Marcel Moolenaar
fd62f5ca46 Implement _ia64_save_context() and _ia64_restore_context(). Both
functions are derived from the swapctx() and restorectx() (resp)
from sys/ia64/ia64/context.s. The code is expected to be 99%
correct, but has not yet been tested.

Note that with these functions operating on mcontext_t, we also
created the foundation upon which we can implement getcontext(2)
and setcontext(2) replacements. It's not guaranteed that the use
of these syscalls and _ia64_{save|restore}_context() on the same
uicontext_t is actually going to work. Replacing the syscalls is
now trivially achieved.

This commit completes the ia64 port of libpthread itself (modulo
testing and bugfixes).
2003-06-27 06:15:13 +00:00
Marcel Moolenaar
b51f305ec1 Implement _ia64_enter_uts(). The purpose of this function is to switch
the register stack and memory stack and call the function given to it.

While here, provide empty, non-working, stubs for the context functions
(_ia64_save_context() and _ia64_restore_context()) so that anyone can at
least compile libkse from CVS sources. Real implementations will follow
soon.
2003-06-26 05:40:15 +00:00
Marcel Moolenaar
6351f43f14 Implement _thr_enter_uts() and _thr_switch() as inline functions to
minimize the amount and complexity of assembly code that needs to be
written. This way the core functionality is spread over 3 elementary
functions that don't have to do anything that can more easily and
more safely be done in C. As such, assembly code will only have to
know about the definition of mcontext_t.
The runtime cost of not having these functions being inlined is less
important than the cleanliness and maintainability of the code at
this stage of the implementation.
2003-06-26 03:55:58 +00:00
Marcel Moolenaar
82468d1f27 Untangle the inter-dependency of kse types and ksd types/functions
by moving the definition of struct ksd to pthread_md.h and removing
the inclusion of ksd.h from thr_private.h (which has the definition
of struct kse and kse_critical_t). This allows ksd.h to have inline
functions that use struct kse and kse_critical_t and generally
yields a cleaner implementation at the cost of not having all ksd
related types/definitions in one header.

Implement the ksd functionality on ia64 by using inline functions
and permanently remove ksd.c from the ia64 specific makefile.

This change does not clean up the i386 specific version of ksd.h.

NOTE: The ksd code on ia64 abuses the tp register in the same way
as it is abused in libthr in that it is incompatible with the
runtime specification. This will be address when support for TLS
hits the tree.
2003-06-23 23:15:06 +00:00
Marcel Moolenaar
46559d7101 Change the definition of _ksd_curkse, _ksd_curthread and
_ksd_readandclear_tmbx to be function-like. That way we
can define them as inline functions or create prototypes
for them.

This change allows the ksd interface on ia64 to be fully
inlined.
2003-06-23 09:49:16 +00:00
Marcel Moolenaar
ca4b6c293b Define THR_{G|S}ETCONTEXT to expand to {g|s}etcontext(2).
Define THR_ALIGN to align at 16-byte boundaries.
2003-06-23 04:52:09 +00:00
Marcel Moolenaar
97caaa6522 Implement atomic_swap_{int|long|ptr}. Define atomic_swap_ptr as a
macro that expands to atomic_swap_long() to avoid compiler warnings
caused by incompatible pointer passing.
2003-06-23 04:44:43 +00:00
Marcel Moolenaar
c2dac9a63d Remove _atomic_lock. It's not used. 2003-06-23 04:33:32 +00:00
Marcel Moolenaar
842728619a Move the machine specific files from sys/Makefile.inc and put them
in a machine specific makefile. While here, sort the sub-directories
in Makefile and remove _atomic_lock.S from all makefiles.
2003-06-23 04:28:31 +00:00
Daniel Eischen
28f318b941 Eek, staticize a couple of functions that shouldn't
be external (initialize()!).

Remove cancellation points from _pthread_cond_wait and
_pthread_cond_timedwait (single underscore versions are
libc private functions).  Point the weak reference(!) for
these functions to the versions with cancellation points.

Approved by:	re@(blanket till 5/19)
Pointed out by:	kan (cancellation point bug)
2003-05-19 23:04:50 +00:00
Daniel Eischen
d143dde438 Move the mailbox to the beginning of the thread and align the
thread so that the context (SSE FPU state) is also aligned.
2003-04-30 15:05:17 +00:00
Daniel Eischen
a8b5a9cd12 Jump to the correct label upon detecting an error. 2003-04-29 21:05:17 +00:00
Daniel Eischen
55613576f5 o Don't add a scope system thread's KSE to the list of available
KSEs when it's thread exits; allow the GC handler to do that.

o Make spinlock/spinlock critical regions.

The following were submitted by davidxu

  o Alow thr_switch() to take a null mailbox argument.

  o Better protect cancellation checks.

  o Don't set KSE specific data when creating new KSEs; rely on the
    first upcall of the KSE to set it.

  o Add the ability to set the maximum concurrency level and do this
    automatically.  We should have a way to enable/disable this with
    some sort of tunable because some applications may not want this
    to be the default.

  o Hold the scheduling lock across thread switch calls.

  o If scheduling of a thread fails, make sure to remove it from the list
    of active threads.

  o Better protect accesses to a joining threads when the target thread is
    exited and detached.

  o Remove some macro definitions that are now provided by <sys/kse.h>.

  o Don't leave the library in threaded mode if creation of the initial
    KSE fails.

  o Wakeup idle KSEs when there are threads ready to run.

  o Maintain the number of threads active in the priority queue.
2003-04-28 23:56:12 +00:00
Daniel Eischen
10629b6587 Add a macro to get the current thread mailbox pointer. 2003-04-23 21:49:34 +00:00
Daniel Eischen
6c2a22923c Use popfl to get the flags off the stack instead of popf.
Submitted by:	davidxu
2003-04-21 03:59:07 +00:00
Daniel Eischen
e4c2ac1637 Sorry folks; I accidentally committed a patch from what I was working
on a couple of days ago.  This should be the most recent changes.

Noticed by:	davidxu
2003-04-18 07:09:43 +00:00
Daniel Eischen
27f625a036 Add architecture dependent atomic ops (atomic_swap only), KSE specific
data, and userland versions of [gs]etcontext().

Modify the UTS entry and exit functions to account of FPU validity
and format.
2003-04-18 05:00:52 +00:00
David Xu
2442bdd81b Directly load %edx from mailbox 2002-11-23 04:39:52 +00:00
David Xu
4949943c48 In _thread_enter_uts, fix eflags saving bug.
In _thread_switch, set current thread pointer in kse mailbox
only after all registers copied out of thread mailbox, kernel will do
upcall at trap time, if set current thread pointer before loading all
registers from thread mailbox, at trap time, the thread mailbox data
will be overwritten by kernel, result is junk data is loaded into CPU.
2002-11-22 11:43:06 +00:00
David Xu
4ab365e720 Adjust code for new mailbox format.
Reviewed by: deischen, mini
2002-11-18 02:02:08 +00:00
Jonathan Mini
2d9a293b4e Use KSE to schedule threads. 2002-10-30 06:07:18 +00:00
Peter Wemm
7657553c76 Add an ia64 atomic lock primitive for libc_r. This is mostly for
completeness and doesn't get us a working libc_r there because libc_r
uses setjmp() and setjmp() cannot be used for context switches on ia64
as-is (or sparc64).  Rather than making setjmp/longjmp behave like
the *context() calls, it would be far better to make libc_r use *context()
directly which is what they are for.

Obtained from:  marcel
2002-07-20 19:22:10 +00:00
Peter Wemm
9d91d74d2b Change #include "DEFS.h" to <machine/asm.h>. 2001-10-25 01:30:54 +00:00
Ruslan Ermilov
8af1452cf8 Removed duplicate VCS ID tags, as per style(9). 2001-08-13 14:06:34 +00:00
Peter Wemm
7f3dea244c $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
Doug Rabson
1624bd7303 Change to a code sequence which is more likely to work on SMP systems.
Now all I need is an alpha SMP box to port FreeBSD to :-)
1998-09-16 09:27:05 +00:00
John Birrell
7d24d0302f Delete the atomic unlock function since it is no longer required.
Simplify the atomic lock to just write a value of 1 to the lock instead
of taking the value passed by the caller (which just confused things).
1998-06-09 08:25:41 +00:00
John Birrell
3dcb4f7556 Atomic lock asm code for the alpha version of libc_r. 1998-06-09 08:21:55 +00:00
John Birrell
1ce8c4dc49 Atomic lock source. 1998-04-29 09:36:03 +00:00