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From Miod Vallat, tested by him and me.
ok deraadt@
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another step toward making splraise an MI api.
ok aoyama@
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this is a step toward making ipls unconditionaly on pools.
ok deraadt@ kettenis@
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ok millert
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ok guenther kettenis
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inside the sigcontext. sigreturn(2) checks syscall entry was from the
exact PC addr in the (per-process ASLR) sigtramp, verifies the cookie,
and clears it to prevent sigcontext reuse.
not yet tested on landisk, sparc, *88k, socppc.
ok kettenis
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all the local ones to ``nticks''.
ok stefan@, deraadt@
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Put addresses instead of registers inside db_regs[] to match what other
archs do and to get rid of db_setf_regs().
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a.out world.
ok deraadt@ kettenis@
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comments
ok millert@
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* pool_allocator_single: single page allocator, always interrupt safe
* pool_allocator_multi: multi-page allocator, interrupt safe
* pool_allocator_multi_ni: multi-page allocator, not interrupt-safe
ok deraadt@, dlg@
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ok deraadt@
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stated here as I have been asked to be polite in this commit message.
ok deraadt@
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the previous asserts checked if the mutex was locked by any cpu or
not when they should have been checking if the current cpu has the
lock or not.
found by miod after i enabled pool_gc again.
ok miod@
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"shared reference pointers".
srp allows concurrent access to a data structure by multiple cpus
while avoiding interlocking cpu opcodes. it manages its own reference
counts and the garbage collection of those data structure to avoid
use after frees.
internally srp is a twisted version of hazard pointers, which are
a relative of RCU.
jmatthew wrote the bulk of a hazard pointer implementation and
changed bpf to use it to allow mpsafe access to bpfilters. however,
at s2k15 we were trying to apply it to other data structures but
the memory overhead of every hazard pointer would have blown out
significantly in several uses cases. a bulk of our time at s2k15
was spent reworking hazard pointers into srp.
this diff adds the srp api and adds the necessary metadata to struct
cpuinfo on our MP architectures. srp on uniprocessor platforms has
alternate code that is optimised because it knows there'll be no
concurrent access to data by multiple cpus.
srp is made available to the system via param.h, so it should be
available everywhere in the kernel.
the docs likely need improvement cos im too close to the implementation.
ok mpi@
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delete coredump_trad(), uvm_coredump(), cpu_coredump(), struct md_coredump,
and various #includes that are superfluous.
This leaves compat_linux processes without a coredump callback. If that
ability is desired, someone should update it to use coredump_elf32() and
verify the results...
ok kettenis@
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had a proper stdint.h. No ports fallout. OK guenther@ miod@
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This is basically glue codes attaching pcic(4) at cbus(4/luna88k),
based on src/sys/dev/isa/i82365_isa{,subr}.c.
Tested on some ne(4) network interface cards, wdc(4) with a CF memory
card, and com(4) with an old XJACK modem card. Currently wi(4) does
not work yet.
suggestions and ok miod@
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Use this on vax to correctly pick the end of the stack area now that the
stackgap adjustment code will no longer guarantee it is a fixed location.
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with and ok miod@
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each arch used to have to provide an rw_cas operation, but now we
have the rwlock code build its own version. on smp machines it uses
atomic_cas_ulong. on uniproc machines it avoids interlocked
instructions by using straight loads and stores. this is safe because
rwlocks are only used from process context and processes are currently
not preemptible in our kernel. so alpha/ppc/etc might get a benefit.
ok miod@ kettenis@ deraadt@
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ok guenther@
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- rename uiomove() to uiomovei() and update all its users.
- introduce uiomove(), which is similar to uiomovei() but with a size_t.
- rewrite uiomovei() as an uiomove() wrapper.
ok kettenis@
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not necessary, but consistent with other platforms. ok deraadt
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automagically if copyout() of the signal frame faults.
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PROT_NONE, PROT_READ, PROT_WRITE, and PROT_EXEC from mman.h.
PROT_MASK is introduced as the one true way of extracting those bits.
Remove UVM_ADV_* wrapper, using the standard names.
ok doug guenther kettenis
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void **. the latter is really hard to cast for, and not what what
solaris does.
ok kettenis@
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routine.
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atomic_cas_uint_mp.
Also, make the interprocessor interlock the only thing on its cache line.
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ok mpi@ sthen@
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compile again; tested by aoyama@
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after discussions with beck deraadt kettenis.
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* you can #include <sys/endian.h> instead of <machine/endian.h>,
and ditto <endian.h> (fixes code that pulls in <sys/endian.h> first)
* those will always export the symbols that POSIX specified for
<endian.h>, including the new {be,le}{16,32,64}toh() set. c.f.
http://austingroupbugs.net/view.php?id=162
if __BSD_VISIBLE then you also get the symbols that our <machine/endian.h>
currently exports (ntohs, NTOHS, dlg's bemtoh*, etc)
* when doing POSIX compiles (not __BSD_VISIBLE), then <netinet/in.h> and
<arpa/inet.h> will *stop* exporting the extra symbols like BYTE_ORDER
and betoh*
ok deraadt@
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The new CPU_BUSY_CYCLE() may be put in a busy loop body so that CPU can reduce
power consumption, as Linux's cpu_relax() and FreeBSD's cpu_spinwait(). To
start minimally, use PAUSE on i386/amd64 and empty on others. The name is
chosen following the existing cpu_idle_*() functions. Naming and API may be
polished later.
OK kettenis@
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not compile-time-known page size platforms.
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