Commit Graph

1686 Commits

Author SHA1 Message Date
Poul-Henning Kamp
67ec58a802 GC the "dumplo" variable, which is no longer used.
A lot of sys/*/*/machdep.c seems not to be.
2002-04-07 21:01:37 +00:00
Alan Cox
aa4d062142 o Eliminate the use of grow_stack() and useracc() from sendsig(), osendsig(),
and osf1_sendsig().
 o Eliminate the prototype for the MD grow_stack() now that it has been removed
   from all platforms.
2002-04-05 00:52:15 +00:00
Eric Melville
1bbfb90c3c Spell "privileges" correctly. 2002-04-05 00:08:38 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on:	i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
Bruce Evans
79065dba2a Moved signal handling and rescheduling from userret() to ast() so that
they aren't in the usual path of execution for syscalls and traps.
The main complication for this is that we have to set flags to control
ast() everywhere that changes the signal mask.

Avoid locking in userret() in most of the remaining cases.

Submitted by:	luoqi (first part only, long ago, reorganized by me)
Reminded by:	dillon
2002-04-04 17:49:48 +00:00
Ruslan Ermilov
12c79eb288 Dike out a highly insecure UCONSOLE option.
TIOCCONS must be able to VOP_ACCESS() /dev/console to succeed.

Obtained from:	OpenBSD
2002-04-03 10:56:59 +00:00
John Baldwin
c53c013bae - Move the MI mutexes sched_lock and Giant from being declared in the
various machdep.c's to being declared in kern_mutex.c.
- Add a new function mutex_init() used to perform early initialization
  needed for mutexes such as setting up thread0's contested lock list
  and initializing MI mutexes.  Change the various MD startup routines
  to call this function instead of duplicating all the code themselves.

Tested on:	alpha, i386
2002-04-02 22:19:16 +00:00
Matthew Dillon
182da8209d Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()
and cpu_critical_exit() and moves associated critical prototypes into their
own header file, <arch>/<arch>/critical.h, which is only included by the
three MI source files that need it.

Backout and re-apply improperly comitted syntactical cleanups made to files
that were still under active development.  Backout improperly comitted program
structure changes that moved localized declarations to the top of two
procedures.  Partially re-apply one of the program structure changes to
move 'mask' into an intermediate block rather then in three separate
sub-blocks to make the code more readable.  Re-integrate bug fixes that Jake
made to the sparc64 code.

Note: In general, developers should not gratuitously move declarations out
of sub-blocks.  They are where they are for reasons of structure, grouping,
readability, compiler-localizability, and to avoid developer-introduced bugs
similar to several found in recent years in the VFS and VM code.

Reviewed by:	jake
2002-04-01 23:51:23 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Poul-Henning Kamp
8d19a26558 Centralize the "bootdev" and "dumpdev" variables. They are still pretty
bogus all things considered, but at least now they don't camouflage as
being MD variables.
2002-03-31 07:15:28 +00:00
Wilko Bulte
7d8817d249 Make the comment section resemble English
MFC after:	2 days
2002-03-29 23:05:05 +00:00
Alan Cox
dceeb8c25c Use the MI vm_map_growstack() instead of the MD grow_stack() in trap(). 2002-03-29 18:55:07 +00:00
Jake Burkholder
d0ce9a7e07 Remove abuse of intr_disable/restore in MI code by moving the loop in ast()
back into the calling MD code.  The MD code must ensure no races between
checking the astpening flag and returning to usermode.

Submitted by:	peter (ia64 bits)
Tested on:	alpha (peter, jeff), i386, ia64 (peter), sparc64
2002-03-29 16:35:26 +00:00
David E. O'Brien
ae7c70d595 style(9)
Approved by:	jake
2002-03-28 02:54:44 +00:00
Wilko Bulte
30af5d1325 On 2nd thought, we can do without plip altogether 2002-03-27 21:10:38 +00:00
Jeff Roberson
f22a4b62f5 Add a new mtx_init option "MTX_DUPOK" which allows duplicate acquires of locks
with this flag.  Remove the dup_list and dup_ok code from subr_witness.  Now
we just check for the flag instead of doing string compares.

Also, switch the process lock, process group lock, and uma per cpu locks over
to this interface.  The original mechanism did not work well for uma because
per cpu lock names are unique to each zone.

Approved by:	jhb
2002-03-27 09:23:41 +00:00
Matthew Dillon
d74ac6819b Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
Doug Rabson
71d645d0a2 Initialise the AS4100 console at the same time as most of the other
platform types instead of deferring it until the mcpcia devices are
probed. This allows the use of e.g. kgdb before the busses are probed.
2002-03-26 19:46:40 +00:00
Wilko Bulte
e38bec6c63 plip has produced an error during attach on Alpha as long as I care
to remember. Nobody in the right sense of their mind would run IP on
the parallel port on Alpha so comment this one out.
2002-03-24 14:35:20 +00:00
David E. O'Brien
c543d983fa Guard against redefining __gnuc_va_list. 2002-03-24 11:25:46 +00:00
David E. O'Brien
439a4003ab ASM versions of __FBSDID. 2002-03-23 02:01:27 +00:00
Andrew Gallatin
60c406ad95 only read from the possibly bad address if we did not get a machine
check.  I don't know how this went unnoticed for so long.

obtained from: NetBSD
MFC after: 7 days
2002-03-22 15:55:56 +00:00
Andrew Gallatin
496ffc90e4 Allow SMP kernels (like GENERIC..) to boot on UP kernels on the alpha.
Pointy hat to: jeff
2002-03-22 15:54:31 +00:00
Andrew Gallatin
ddf23aa842 shut up the compiler 2002-03-21 18:48:00 +00:00
Warner Losh
b70c0e8b00 Fix abuses of cpu_critical_{enter,exit} by converting to
intr_{disable,restore} as well as providing an implemenation of
intr_{disable,restore}.
2002-03-21 06:14:58 +00:00
John Baldwin
f25fcd64b8 Change the way we ensure td_ucred is NULL if DIAGNOSTIC is defined.
Instead of caching the ucred reference, just go ahead and eat the
decerement and increment of the refcount.  Now that Giant is pushed down
into crfree(), we no longer have to get Giant in the common case.  In the
case when we are actually free'ing the ucred, we would normally free it on
the next kernel entry, so the cost there is not new, just in a different
place.  This also removse td_cache_ucred from struct thread.  This is
still only done #ifdef DIAGNOSTIC.

Tested on:	i386, alpha
2002-03-20 21:09:09 +00:00
David E. O'Brien
d0ce7d0078 Remove __P(). This was tested on the GENERIC kernel. 2002-03-20 18:58:47 +00:00
Jeff Roberson
851031501a Remove references to vm_zone.h and switch over to the new uma API. 2002-03-20 10:35:22 +00:00
Jeff Roberson
c186f9b280 Remove unused header. 2002-03-20 09:46:04 +00:00
Jeff Roberson
df66668c42 Force the boot cpu to wait for the APs to finish starting up. This eliminates
a race where the AP and the boot cpu were trying to printf at the same time,
which was confusing the console too much for it to continue working.
2002-03-20 02:27:55 +00:00
Jeff Roberson
8355f576a9 This is the first part of the new kernel memory allocator. This replaces
malloc(9) and vm_zone with a slab like allocator.

Reviewed by:	arch@
2002-03-19 09:11:49 +00:00
Dag-Erling Smørgrav
a2e0658045 Move the definition of PT_[GS]ET{,DB,FP}REGS from the MD ptrace.h to the
MI ptrace.h, since all platforms define them.  Keep the MD ptrace.h around
for FIX_SSTEP (which is currently only needed on Alpha).
2002-03-16 00:25:53 +00:00
Dag-Erling Smørgrav
830c02d426 Remove a bogus cast and deconstification that broke the Alpha kernel build. 2002-03-13 19:16:41 +00:00
Dag-Erling Smørgrav
979f47f40d Back out previous commit, it was the wrong patch! 2002-03-13 19:13:41 +00:00
Dag-Erling Smørgrav
51238e752e Remove a bogus cast that breaks the Alpha kernel build due to -Werror. 2002-03-13 19:12:31 +00:00
John Baldwin
bb7d54e8c7 Fix a misspelling of mine: s/optomization/optimization/.
Noticed by:	bmilekic
2002-03-11 19:58:53 +00:00
John Baldwin
ee1b1a6549 Grrr, turn preemption back off on the alpha again. It is still not stable.
Noticed by:	wilko, mjacob, jhb, peter, and others
2002-03-11 19:35:10 +00:00
Mike Barcroft
d846855da8 o Don't require long long support in bswap64() functions.
o In i386's <machine/endian.h>, macros have some advantages over
  inlines, so change some inlines to macros.
o In i386's <machine/endian.h>, ungarbage collect word_swap_int()
  (previously __uint16_swap_uint32), it has some uses on i386's with
  PDP endianness.

Submitted by:	bde

o Move a comment up in <machine/endian.h> that was accidentially moved
  down a few revisions ago.
o Reenable userland's use of optimized inline-asm versions of
  byteorder(3) functions.
o Fix ordering of prototypes vs. redefinition of byteorder(3)
  functions, so that the non-GCC (libc asm) case has proper
  prototypes.
o Add proper prototypes for byteorder(3) functions in <sys/param.h>.
o Prevent redundant duplicate prototypes by making use of the
  _BYTEORDER_PROTOTYPED define.
o Move the bswap16(), bswap32(), bswap64() C functions into MD space
  for platforms in which asm versions don't exist.  This significantly
  reduces the complexity of some things at the cost of duplicate code.

Reviewed by:	bde
2002-03-09 21:02:16 +00:00
Jake Burkholder
752dff3d9c Add needed includes of machine/smp.h, remove nested include in sys/smp.h
so that inlines in machine/smp.h can use variables declared in sys/smp.h.
2002-03-07 04:43:51 +00:00
Jeff Roberson
88c99cfbc8 Add a new variable mp_maxid. This is used so that per cpu datastructures may
be allocated as arrays indexed by the cpu id.  Previously the only reliable
way to know the max cpu id was through MAXCPU. mp_ncpus isn't useful here
because cpu ids may be sparsely mapped, although x86 and alpha do not do this.

Also, call cpu_mp_probe much earlier so the max cpu id is known before the VM
starts up.  This is intended to help support per cpu queues for the new
allocator, but may be useful elsewhere.

Reviewed by:	jake
Approved by:	jake
2002-03-05 10:01:46 +00:00
Matt Jacob
b96eda156f Make it compile again. 2002-03-01 23:15:45 +00:00
Matt Jacob
8f22da0d0b Fix mcpcia.c so it compiles again. 2002-03-01 23:10:19 +00:00
Andrew R. Reiter
66c862bc1b - Move a comment from being on the same line as a #ifdef to the line
following it.  This should have gone in the previous commit, but
  misviewed Bruce's patch.

Requested by: bde
2002-02-28 21:52:08 +00:00
Andrew Gallatin
ac278dcfc0 add inlines for bswap*.
smaller versions of the byteswap routines were obtained from NetBSD
2002-02-28 18:21:51 +00:00
Andrew Gallatin
030cb46918 recover from namespace collision caused by un-static'ing pci_alloc_resource()
in rev  1.187 of sys/dev/pci/pci.c
2002-02-28 18:18:41 +00:00
Andrew R. Reiter
216ae18217 - Fix panic() message and a couple style nits that snuck in from the
recent diagnostics commit (rev. 1.84).
2002-02-28 08:28:14 +00:00
Mike Silbersack
f4e18c9afd Fix a minor swap leak.
Previously, the UPAGES/KSTACK area of processes/threads would leak memory
at the time that a previously swapped process was terminated.  Lukcily, the
leak was only 12K/proc, so it was unlikely to be a major problem unless you
had an undersized swap partition.

Submitted by:	dillon
Reviewed by:	silby
MFC after:	1 week
2002-02-28 07:41:12 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
Mike Silbersack
7f3a40933b Fix a horribly suboptimal algorithm in the vm_daemon.
In order to determine what to page out, the vm_daemon checks
reference bits on all pages belonging to all processes.  Unfortunately,
the algorithm used reacted badly with shared pages; each shared page
would be checked once per process sharing it; this caused an O(N^2)
growth of tlb invalidations.  The algorithm has been changed so that
each page will be checked only 16 times.

Prior to this change, a fork/sleepbomb of 1300 processes could cause
the vm_daemon to take over 60 seconds to complete, effectively
freezing the system for that time period.  With this change
in place, the vm_daemon completes in less than a second.  Any system
with hundreds of processes sharing pages should benefit from this change.

Note that the vm_daemon is only run when the system is under extreme
memory pressure.  It is likely that many people with loaded systems saw
no symptoms of this problem until they reached the point where swapping
began.

Special thanks go to dillon, peter, and Chuck Cranor, who helped me
get up to speed with vm internals.

PR:		33542, 20393
Reviewed by:	dillon
MFC after:	1 week
2002-02-27 18:03:02 +00:00
Thomas Moestl
90ce56c287 Add the following functions/macros to support byte order conversions and
device drivers for bus system with other endinesses than the CPU (using
interfaces compatible to NetBSD):

- bwap16() and bswap32(). These have optimized implementations on some
  architectures; for those that don't, there exist generic implementations.
- macros to convert from a certain byte order to host byte order and vice
  versa, using a naming scheme like le16toh(), htole16().
  These are implemented using the bswap functions.
- stream bus space access functions, which do not perform a byte order
  conversion (while the normal access functions would if the bus endianess
  differs from the CPU endianess).

htons(), htonl(), ntohs() and ntohl() are implemented using the new
functions above for kernel usage. None of the above interfaces is currently
exported to user land.

Make use of the new functions in a few places where local implementations
of the same functionality existed.

Reviewed by:	mike, bde
Tested on alpha by:	mike
2002-02-27 17:16:18 +00:00
Julian Elischer
77c4066424 Add some DIAGNOSTIC code.
While in userland, keep the thread's ucred reference in a shadow
field so that the usual place to store it is NULL.
If DIAGNOSTIC is not set, the thread ucred is kept valid until the next
kernel entry, at which time it is checked against the process cred
and possibly corrected. Produces a BIG speedup in
kernels with INVARIANTS set. (A previous commit corrected it
for the non INVARIANTS case already)

Reviewed by:	dillon@freebsd.org
2002-02-22 23:58:22 +00:00
Poul-Henning Kamp
1cbb9c3b03 Convert p->p_runtime and PCPU(switchtime) to bintime format. 2002-02-22 13:32:01 +00:00
Andrew Gallatin
7cacd13117 recovery from new binutils part II: fix the alpha kernel so that
it handles R_ALPHA_RELATIVE relocs with addends properly.

tested by: ticso
2002-02-21 23:34:09 +00:00
Andrew Gallatin
35a86b35c1 MFi386: merge changes from i386/trap.c rev 1.212
If the credential on an incoming thread is correct, don't bother
reaquiring it. In the same vein, don't bother dropping the thread cred
when going to userland. We are guaranteed to need it when we come back,
(which we are guaranteed to do).
2002-02-19 03:13:39 +00:00
Mike Barcroft
fd8e4ebc8c o Move NTOHL() and associated macros into <sys/param.h>. These are
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
  source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
  Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
  POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
  and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
  complexities associated with having MD (asm and inline) versions, and
  having to prevent exposure of these functions in other headers that
  happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
  third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.

Tested on:	alpha, i386
Reviewed by:	bde, jake, tmm
2002-02-18 20:35:27 +00:00
Daniel Eischen
0270d57aef Use struct __ucontext in prototypes and associated functions instead of
ucontext_t.  Forward declare struct __ucontext in <sys/signal.h> and
remove reliance on <sys/ucontext.h> being included.

While I'm here, also hide osigcontext types from userland; suggested
by bde.

Namespace pollution noticed by: Kevin Day <toasty@shell.dragondata.com>
2002-02-17 17:40:34 +00:00
Garrett Wollman
3b7a4c4b1d Resurrect one of the easiest changes from my big include files roll-up
patch from a year ago: give file flags their own type.  This does not
(yet) change the type used by system calls or library functions.
The underlying type was chosen to match what is returned by stat().
2002-02-15 22:15:39 +00:00
Robert Watson
92b98fdabe Remove WITNESS from GENERIC by default: as we grow more locks, this gets
slower, and may be impeding adoption of -CURRENT by developers.  We
recommend turning on WITNESS by default on crash boxes, and when doing
locking development.  It will probably get turned on by default for a week
or two following any major locking commits, also.

Approved by:	all and sundry (jhb, phk, ...)
2002-02-13 07:44:59 +00:00
John Baldwin
2deac418f3 Don't grab the ICU lock while reading the current pending interrupts and
current masked interrupts from the AT PIC.

Requested by:	bde
2002-02-08 18:30:36 +00:00
John Baldwin
6c2b6a945d Turn SMP back on by default in GENERIC on the Alpha. 2002-02-08 18:25:07 +00:00
John Baldwin
0730d79121 Turn interrupt thread preemption back on on the alpha.
Tested by:	mjacob
2002-02-08 18:23:46 +00:00
Peter Wemm
fe0d0493ac Bah, I managed to turn cosmetic things into real bugs. Fix shadowed
variable declarations. :-(  Definately not my day today.
2002-02-08 08:56:01 +00:00
Peter Wemm
588e970c0b Fix a long line introduced in previous commit. 2002-02-07 22:29:41 +00:00
Peter Wemm
3953037ff8 Fix long line added in previous commit. 2002-02-07 22:28:24 +00:00
Peter Wemm
6e948886d3 Patch up some long lines introduced in previous commit. 2002-02-07 22:26:51 +00:00
Peter Wemm
2850a06d42 Fix style bug introduced in previous commit. 2002-02-07 22:26:07 +00:00
Matt Jacob
943e9b67f5 You cannot take the address of a variable with the 'register' qualifier.
MFC after:	1 day
2002-02-07 22:06:23 +00:00
Julian Elischer
079b7badea Pre-KSE/M3 commit.
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.

Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
Poul-Henning Kamp
e0ee6f5629 GC the PC_SWITCH* symbols which are not used in assembly anymore. 2002-02-07 10:27:58 +00:00
Matt Jacob
2a62c7174a Replace the MFREE that Marshal (Quick Draw) Dillon apparently didn't look for.
MFC after:	1 day
2002-02-07 08:39:26 +00:00
John Baldwin
78a1485fd1 Fixes for alpha pmap on SMP machines:
- Create a private list of active pmaps rather than abusing the list of all
  processes when we need to look up pmaps.  The process list needs a sx lock
  and we can't be getting sx locks in the middle of cpu_switch()
  (pmap_activate() can call pmap_get_asn() from cpu_switch()).  Instead, we
  protect the list with a spinlock.  This also means the list is shorter
  since a pmap can be used by more than one process and we could (at least
  in thoery) dink with pmap's more than once, but now we only touch each
  pmap once when we have to update all of them.
- Wrap pmap_activate()'s code to get a new ASN in an explicit critical section
  so that when it is called while doing an exec() we can't get preempted.
- Replace splhigh() in pmap_growkernel() with a critical section to prevent
  preemption while we are adjusting the kernel page tables.
- Fixes abuse of PCPU_GET(), which doesn't return an L-value.
- Also adds some slight cleanups to the ASN handling by adding some macros
  instead of magic numbers in relation to the ASN and ASN generations.

Reviewed by:	dfr
2002-02-06 04:30:26 +00:00
Bruce Evans
5c8d0a85b0 Improve the change in the previous commit: use a stub for osigreturn()
when it is not really used instead of unconditionalizing all of it.
2002-02-03 04:09:02 +00:00
Bruce Evans
55a9536b65 Compile osigreturn() unconditionally since it will always be needed on
some arches and the syscall table is machine-independent.  It was
(bogusly) conditional on COMPAT_43, so this usually makes no difference.

ia64: in addition:
- replace the bogus cloned comment before osigreturn() by a correct one.
  osigreturn() is just a stub fo ia64's.
- fix the formatting of cloned comment before sigreturn().
- fix the return code.  use nosys() instead of returning ENOSYS to get
  the same semantics as if the syscall is not in the syscall table.
  Generating SIGSYS is actually correct here.
- fix style bugs.

powerpc: copy the cleaned up ia64 stub.  This mainly fixes a bogus comment.

sparc64: copy the cleaned up the ia64 stub, since there was no stub before.
2002-02-01 15:44:03 +00:00
Andrew Gallatin
ae967e6461 Regenerated file from previous commit to syscalls.master 2002-01-23 22:47:47 +00:00
Andrew Gallatin
21e06996e4 Linux/alpha uses the same BSDish return mechanism we do for
getpid, getuid, getgid and pipe, since they bootstrapped from
OSF/1 and never cleaned up.  Switch to the native syscalls
on alpha so that the above functions work

MFC after: 7 days
2002-01-23 22:46:14 +00:00
Andrew Gallatin
500c14f6af Don't read the sigcontext pointer directly from userspace. If the process
is swapped out, this can cause a system panic.  Copy it in, instead

tested by: Bernd Walter <ticso@cicely8.cicely.de>
2002-01-22 02:40:39 +00:00
Peter Wemm
58815d1196 Avoid __func__ string concatenation 2002-01-18 04:41:23 +00:00
Matt Jacob
d5befad6dd Allow alpha kernels to compile again- make sure opt_ddb.h is included
and the reference to db_regs is *extern* from alpha/include/db_machdep.h
(put it in alpha/alpha/machdep.c)- this avoids the problems we've had
about different 'common' sizes prohibiting the kernel from linking.
2002-01-17 02:16:35 +00:00
John Baldwin
6a29486b53 - Catch up printtrap() to KSE by using curthread and testing it against
NULL rather than curproc.  Without this, if we trap early before
  curthread is set, we recursively panic.
- In an SMP kernel, if we trap before curthread is set, then trap is going
  to recursively panic trying to bump td->td_md.md_kernnest.  The trap is
  fatal anyways, so to make debugging easier just call printtrap() to
  dump the trap info to the console and then halt.
2002-01-15 14:17:07 +00:00
Alfred Perlstein
a4db49537b Replace ffind_* with fget calls.
Make fget MPsafe.

Make fgetvp and fgetsock use the fget subsystem to reduce code bloat.

Push giant down in fpathconf().
2002-01-14 00:13:45 +00:00
Alfred Perlstein
426da3bcfb SMP Lock struct file, filedesc and the global file list.
Seigo Tanimura (tanimura) posted the initial delta.

I've polished it quite a bit reducing the need for locking and
adapting it for KSE.

Locks:

1 mutex in each filedesc
   protects all the fields.
   protects "struct file" initialization, while a struct file
     is being changed from &badfileops -> &pipeops or something
     the filedesc should be locked.

1 mutex in each struct file
   protects the refcount fields.
   doesn't protect anything else.
   the flags used for garbage collection have been moved to
     f_gcflag which was the FILLER short, this doesn't need
     locking because the garbage collection is a single threaded
     container.
  could likely be made to use a pool mutex.

1 sx lock for the global filelist.

struct file *	fhold(struct file *fp);
        /* increments reference count on a file */

struct file *	fhold_locked(struct file *fp);
        /* like fhold but expects file to locked */

struct file *	ffind_hold(struct thread *, int fd);
        /* finds the struct file in thread, adds one reference and
                returns it unlocked */

struct file *	ffind_lock(struct thread *, int fd);
        /* ffind_hold, but returns file locked */

I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00
John Baldwin
e60c44e873 Add missing prototype for pmap_unmapdev(). 2002-01-11 09:41:03 +00:00
Daniel Eischen
8ec12ea9ce Use a spare slot in the machine context to identify the context format
and to inherently verify its validity.  Alpha signal frames and trap
frames are different; this field identifies which format the context
is

Set the machine context format (signal frame) before copying it out
when sending a signal.

Approved by:	-arch
2002-01-10 02:36:30 +00:00
Peter Wemm
ead8168ac0 Convert a bunch of 1 << PCPU_GET(cpuid) to PCPU_GET(cpumask). 2002-01-05 09:41:37 +00:00
John Baldwin
c86b6ff551 Change the preemption code for software interrupt thread schedules and
mutex releases to not require flags for the cases when preemption is
not allowed:

The purpose of the MTX_NOSWITCH and SWI_NOSWITCH flags is to prevent
switching to a higher priority thread on mutex releease and swi schedule,
respectively when that switch is not safe.  Now that the critical section
API maintains a per-thread nesting count, the kernel can easily check
whether or not it should switch without relying on flags from the
programmer.  This fixes a few bugs in that all current callers of
swi_sched() used SWI_NOSWITCH, when in fact, only the ones called from
fast interrupt handlers and the swi_sched of softclock needed this flag.
Note that to ensure that swi_sched()'s in clock and fast interrupt
handlers do not switch, these handlers have to be explicitly wrapped
in critical_enter/exit pairs.  Presently, just wrapping the handlers is
sufficient, but in the future with the fully preemptive kernel, the
interrupt must be EOI'd before critical_exit() is called.  (critical_exit()
can switch due to a deferred preemption in a fully preemptive kernel.)

I've tested the changes to the interrupt code on i386 and alpha.  I have
not tested ia64, but the interrupt code is almost identical to the alpha
code, so I expect it will work fine.  PowerPC and ARM do not yet have
interrupt code in the tree so they shouldn't be broken.  Sparc64 is
broken, but that's been ok'd by jake and tmm who will be fixing the
interrupt code for sparc64 shortly.

Reviewed by:	peter
Tested on:	i386, alpha
2002-01-05 08:47:13 +00:00
Dag-Erling Smørgrav
36bf75f010 This file does not need to include procfs.h. This fixes a bunch of warnings. 2002-01-01 14:46:57 +00:00
Thomas Moestl
01f1aed259 Use the new resource_list_print_type() function.
Pass the bus device to isa_init() (this is needed for the sparc64
version).
2001-12-21 21:54:56 +00:00
John Baldwin
98f9879242 Introduce a standard name for the lock protecting an interrupt controller
and it's associated state variables: icu_lock with the name "icu".  This
renames the imen_mtx for x86 SMP, but also uses the lock to protect
access to the 8259 PIC on x86 UP.  This also adds an appropriate lock to
the various Alpha chipsets which fixes problems with Alpha SMP machines
dropping interrupts with an SMP kernel.
2001-12-20 23:48:31 +00:00
Peter Wemm
3c2a5d7e30 Fix typo. s/pa/va/. *blush* 2001-12-20 22:47:20 +00:00
Peter Wemm
ff5a52e18e Replace a bunch of:
for (pv = TAILQ_FIRST(&m->md.pv_list);
               pv;
               pv = TAILQ_NEXT(pv, pv_list)) {
with:
      TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
2001-12-20 05:29:59 +00:00
Peter Wemm
b50e204300 Fix some whitespace nits, converge with other pmap.c's 2001-12-20 03:44:43 +00:00
John Baldwin
acec0a5867 Merge part of revision 1.18 of sys/i386/linux/linux_machdep.c: don't use
RFTHREAD in linux_clone().
2001-12-18 18:50:02 +00:00
John Baldwin
1857e7825f Whitespace fix. 2001-12-18 18:03:48 +00:00
John Baldwin
7e1f6dfe9d Modify the critical section API as follows:
- The MD functions critical_enter/exit are renamed to start with a cpu_
  prefix.
- MI wrapper functions critical_enter/exit maintain a per-thread nesting
  count and a per-thread critical section saved state set when entering
  a critical section while at nesting level 0 and restored when exiting
  to nesting level 0.  This moves the saved state out of spin mutexes so
  that interlocking spin mutexes works properly.
- Most low-level MD code that used critical_enter/exit now use
  cpu_critical_enter/exit.  MI code such as device drivers and spin
  mutexes use the MI wrappers.  Note that since the MI wrappers store
  the state in the current thread, they do not have any return values or
  arguments.
- mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is
  assigned to curthread->td_savecrit during fork_exit().

Tested on:	i386, alpha
2001-12-18 00:27:18 +00:00
John Baldwin
1ecf0d56c8 Small cleanups to the SMP code:
- Axe inlvtlb_ok as it was completely redundant with smp_active.
- Remove references to non-existent variable and non-existent file
  in i386/include/smp.h.
- Don't perform initializations local to each CPU while holding the
  ap boot lock on i386 while an AP bootstraps itself.
- Reorganize the AP startup code some to unify the latter half of the
  functions to bring an AP up.  Eventually this might be broken out into
  a MI function in subr_smp.c.
2001-12-17 23:14:35 +00:00
Ian Dowse
1cb4661d56 Enable UFS_DIRHASH in the GENERIC kernel.
Suggested by:	silby
Reviewed by:	dillon
MFC after:	5 days
2001-12-14 16:27:11 +00:00
John Baldwin
0bbc882680 Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake
2001-12-11 23:33:44 +00:00
David E. O'Brien
acdff873d8 style(9) 2001-12-09 19:12:07 +00:00
Matthew Dillon
66a11b9fb1 Allow maxusers to be specified as 0 in the kernel config, which will
cause the system to auto-size to between 32 and 512 depending on the
amount of memory.

MFC after:	1 week
2001-12-09 01:57:09 +00:00
Dag-Erling Smørgrav
4cdff317aa s/^options\t\t/options \t/ 2001-12-04 11:17:31 +00:00
Dag-Erling Smørgrav
3cdd7aa817 PROCFS requires PSEUDOFS. 2001-12-04 11:17:30 +00:00
Mike Barcroft
de2656d0ed o Stop abusing MD headers with non-MD types.
o Hide nonstandard functions and types in <netinet/in.h> when
  _POSIX_SOURCE is defined.
o Add some missing types (required by POSIX.1-200x) to <netinet/in.h>.
o Restore vendor ID from Rev 1.1 in <netinet/in.h> and make use of new
  __FBSDID() macro.
o Fix some miscellaneous issues in <arpa/inet.h>.
o Correct final argument for the inet_ntop() function (POSIX.1-200x).
o Get rid of the namespace pollution from <sys/types.h> in
  <arpa/inet.h>.

Reviewed by:		fenner
Partially submitted by:	bde
2001-12-01 03:43:01 +00:00
Andrew Gallatin
a58b29a603 fix DIAGNOSTIC panic caused by proc/thread typo
tested by: Martijn Pronk <martijn@smartie.xs4all.nl>
2001-11-29 15:33:46 +00:00
Jonathan Lemon
9497337452 The DEC kn300 has special code for console handling hardcoded here, so add
a call to promcndetach() to explicitly turn off the prom console.

Tested by: Jeff Roberson
2001-11-22 02:41:34 +00:00
Peter Wemm
0891c82c32 Cosmetic tweak to eliminate some diffs 2001-11-16 02:44:55 +00:00
Peter Wemm
ee0e75a4e0 Merge another missing part of i386/pmap.c rev 1.220. Dont blindly clear
the PG_BUSY flag without using the code that wakes up something else that
may be sleeping on it.
2001-11-16 02:41:31 +00:00
Peter Wemm
ab29f8765d Oops, I accidently merged a whitespace error from the original commit.
(whitespace at end of line in rev 1.264 pmap.c).  Fix them all.
2001-11-16 02:31:20 +00:00
Peter Wemm
303f52d500 Merge rev 1.264 from i386/pmap.c (tegge via alfred):
Protect against an infinite loop when prefaulting pages.  This can
happen when the vm system maps past the end of an object or tries
to map a zero length object, the pmap layer misses the fact that
offsets wrap into negative numbers and we get stuck.
2001-11-16 02:28:33 +00:00
Peter Wemm
88b5258822 Merge rev 1.202 from i386/pmap.c (back in 1998 by John Dyson):
Make flushing dirty pages work correctly on filesystems that
unexpectedly do not complete writes even with sync I/O requests.
This should help the behavior of mmaped files when using
softupdates (and perhaps in other circumstances also.)
2001-11-16 02:25:29 +00:00
Peter Wemm
79eb7b284f Merge rev 1.293 of i386/pmap.c - skip PG_UNMANAGED in pmap_collect() 2001-11-16 02:20:40 +00:00
Peter Wemm
8ad881324c Converge/fix some debug code (#if 0'ed on alpha, but whatever)
- use NPTEPG/NPDEPG instead of magic 1024 (important for PAE)
- use pt_entry_t instead of unsigned (important for PAE)
- use vm_offset_t instead of unsigned for va's (important for x86-64)
2001-11-16 02:17:18 +00:00
Peter Wemm
704be0159c Converge with i386/pmap.c - dont refer to curproc, use curthread. 2001-11-16 02:06:06 +00:00
Peter Wemm
4cd0f1ee99 Merge part of i386/pmap.c rev 1.220 that got missed in alpha/pmap.c
rev 1.10
2001-11-16 02:02:21 +00:00
Peter Wemm
024c3fd9d5 As part of a general cleanup and reconvergence of related pmap code,
start tidying up some loose ends.  The DEBUG_VA stuff has long since
passed its use-by date.  It wasn't used on ia64 but got cut/pasted there.
2001-11-16 01:56:34 +00:00
Poul-Henning Kamp
efd1585a7a Don't call cdevsw_add(). 2001-11-04 11:50:08 +00:00
Andrew Gallatin
cd4e23cead Introduce a boot environment variable (clock_compat_osf1) which can
be set to 1 to make FreeBSD and Tru64 coexist peacefully on a dual
boot system and not clobber each other's year in the TOY clock.
(Tru64 uses an offset 52 years higher than one would expect)

Obtained from: NetBSD
MFC After: 1 week
2001-11-03 17:22:50 +00:00
Poul-Henning Kamp
b8ea5f7f0f Remove unneeded and #if 0'ed code to register in cdevsw[] 2001-11-03 17:05:12 +00:00
Matthew Dillon
5d339e3d47 Implement i386/i386/pmap.c 1.292 for alpha, ia64 (avoid free
page exhaustion / kernel panic for certain madvise() scenarios)
2001-11-03 01:08:55 +00:00
Mike Barcroft
0ac2d551f2 o Add new header <sys/stdint.h>.
o Make <stdint.h> a symbolic link to <sys/stdint.h>.
o Move most of <sys/inttypes.h> into <sys/stdint.h>, as per C99.
o Remove <sys/inttypes.h>.
o Adjust includes in sys/types.h and boot/efi/include/ia64/efibind.h
  to reflect new location of integer types in <sys/stdint.h>.
o Remove previously symbolicly linked <inttypes.h>, instead create a
  new file.
o Add MD headers <machine/_inttypes.h> from NetBSD.
o Include <sys/stdint.h> in <inttypes.h>, as required by C99; and
  include <machine/_inttypes.h> in <inttypes.h>, to fill in the
  remaining requirements for <inttypes.h>.
o Add additional integer types in <machine/ansi.h> and
  <machine/limits.h> which are included via <sys/stdint.h>.

Partially obtain from:	NetBSD
Tested on:		alpha, i386
Discussed on:		freebsd-standards@bostonradio.org
Reviewed by:		bde, fenner, obrien, wollman
2001-11-02 18:05:43 +00:00
Mike Barcroft
23ab7d0fa2 Rather than just change the arguments to suser() change the function to
suser_xxx() as well.

Pointy hat to:	rwatson
2001-11-02 17:42:03 +00:00
Peter Wemm
97c97bb16b "Fix" a problem that got copied from alpha to ia64 and broke there.
When we truncate the msgbuf size because the last chunk is too small,
correctly terminate the phys_avail[] array - the VM system tests
the *end* for zero, not the start.  This leads the VM startup to
attempt to recreate a duplicate set of pages for all physical memory.

XXX the msgbuf handling is suspiciously different on i386 vs
alpha/ia64...
2001-11-02 00:41:00 +00:00
Robert Watson
309b8fb98a o Permit osf1-emulated programs to modify uid/gid under jail by
switching suser() to suser_xxx() and adding PRISON_ROOT flag.
2001-11-01 20:16:03 +00:00
Matt Jacob
f43f61207d Fix misspelling in comment. 2001-10-31 18:07:38 +00:00
Dag-Erling Smørgrav
a08d68de5b Eliminate the prefix parameter to linux_emul_find(), which was always
linux_emul_path anyway.  Linux_emul_find() has interesting bugs in its
prefix handling (which luckily are not currently exploitable); this
commit is preliminary to an attempt at cleaning it up.

Approved by:	marcel
2001-10-27 11:15:19 +00:00
Matthew Dillon
8d5c8e9f04 minor commenting based on syscall environment 2001-10-26 20:35:52 +00:00
Matt Jacob
831039f850 Detach the prom console when platform.cons_init is called. This seems
to avoid most of the double character kernel goop we've been having by having
both a prom console && a normal console.

Was not able to test with graphics head. Hope this doesn't break anything.

Reviewed by:	silence on alpha
2001-10-26 16:13:47 +00:00
John Baldwin
8e2e767b1f Add a per-thread ucred reference for syscalls and synchronous traps from
userland.  The per thread ucred reference is immutable and thus needs no
locks to be read.  However, until all the proc locking associated with
writes to p_ucred are completed, it is still not safe to use the per-thread
reference.

Tested on:	x86 (SMP), alpha, sparc64
2001-10-26 08:12:54 +00:00
Jonathan Lemon
553b79aa63 cn_tab no longer exists, use cnadd() to add a console device. Note that
this may result in duplicate console output in some cases.
2001-10-24 18:30:05 +00:00
Jonathan Lemon
b792b54c89 Remove call to cninit_finish(). 2001-10-24 17:42:01 +00:00
Mike Barcroft
3a72286480 Remove funky right justification.
Pointed out by:	bde
2001-10-23 00:42:15 +00:00
Dag-Erling Smørgrav
7c62990641 Move procfs_* from procfs_machdep.c into sys_process.c, and rename them to
proc_* in the process; procfs_machdep.c is no longer needed.

Run-tested on i386, build-tested on Alpha, untested on other platforms.
2001-10-21 23:57:24 +00:00
Dag-Erling Smørgrav
1f04261973 [partially forced commit due to pilot error in earlier commit attempt]
{set,fill}_{,fp,db}regs() fixup:

 - Add dummy {set,fill}_dbregs() on architectures that don't have them.

 - KSEfy the powerpc versions (struct proc -> struct thread).

 - Some architectures had the prototypes in md_var.h, some in reg.h, and
   some in both; for consistency, move them to reg.h on all platforms.

These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
one yet.

Run-tested on i386, build-tested on Alpha, untested on other platforms.
2001-10-21 22:16:48 +00:00
Dag-Erling Smørgrav
ef394d81ad {set,fill}_{,fp,db}regs() fixup:
- Add dummy {set,fill}_dbregs() on architectures that don't have them.

 - KSEfy the powerpc versions (struct proc -> struct thread).

 - Some architectures had the prototypes in md_var.h, some in reg.h, and
   some in both; for consistency, move them to reg.h on all platforms.

These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
{set,fill}_{,fp,db}regs() fixup:

 - Add dummy {set,fill}_dbregs() on architectures that don't have them.

 - KSEfy the powerpc versions (struct proc -> struct thread).

 - Some architectures had the prototypes in md_var.h, some in reg.h, and
   some in both; for consistency, move them to reg.h on all platforms.

These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
one yet.

Run-tested on i386, build-tested on Alpha, untested on other platforms.
2001-10-21 22:14:00 +00:00
Andrew Gallatin
e47b20bee2 - splhigh()/splx() -> critical_enter()/critical_exit()
- fix KV macro in t2_pci.c to include the sable_lynx_base variable
so that the T2 CSRs can be found on lynxes.   Current should be
bootable on lynxes now.
2001-10-20 21:05:14 +00:00
Matt Jacob
8c7c272c5a Remove wx. 2001-10-20 18:50:31 +00:00
Andrew Gallatin
dd79258102 apparently EV5 2x00s have their t2 CSRs where I'd expect to find
them on a  2100A

Thanks to Tyler Willingham <ze_willow@yahoo.com> for letting me
test this on his AS2000
2001-10-20 01:27:23 +00:00
David E. O'Brien
9f9bd82e15 Try two on the preprocessing logic.
Reviewed by:	ru
2001-10-19 20:01:01 +00:00
John Baldwin
e37d2a8c82 Remove unneeded sys/mutex.h includes. 2001-10-19 19:23:32 +00:00
John Baldwin
d6e19ad10e Move sys/mutex.h include after sys/lock.h to ensure we use the proper
versions of the mutex operations.
2001-10-19 19:22:04 +00:00
David E. O'Brien
4b16cf4f8a Blah, fix braino where ru had to remind me of proper preprocessor syntax.
Bad fingers, no cookie.
2001-10-19 19:17:11 +00:00
Marcel Moolenaar
5983000903 After removing the bogus differences, any real incompatibilities
have been merged into /sys/compat/linux/linux_ioctl.h. This file
is now unused.
2001-10-19 08:20:15 +00:00
David E. O'Brien
e3ddd70789 My attempts at minimizing the number of #def's got me in trouble. 2001-10-18 16:07:21 +00:00
David E. O'Brien
4a3391b5a1 Add support for "__gnuc_va_list". Some overly "smart" libraries assume
the existence of the __gnuc_va_list type[*] because our compiler is GCC.

[*] __gnuc_va_list is defined in the GCC ginclude/stdarg.h replacement
headerwhich we don't use.
2001-10-18 00:27:39 +00:00
David E. O'Brien
a3fc3de448 Sync comments with i386. 2001-10-18 00:00:31 +00:00
John Baldwin
c006932186 Small cleanups to the handling of Giant in trap(). 2001-10-17 21:55:56 +00:00
Matt Jacob
aaeac4f6c3 Make SCSI changer and SES devices standard in generic kernels.
Reviewed by:	ken@kdm.org
2001-10-16 22:22:58 +00:00
Marcel Moolenaar
4c1e3817c4 Implement linux_chown and linux_lchown. The fchown syscall maps
directly to the native syscall, because no filename handling
needs to be done.

Tested by: Martin Blapp <mb@imp.ch>
2001-10-16 06:15:36 +00:00
Dag-Erling Smørgrav
268aeb1ed3 In FreeBSD's ifreq, ifr_ifru.ifru_flags is an array of two chars, while Linux
defines it as a short.  Change that to an array of one short so that FreeBSD's
ifr_flags macro will work (it evaluates to ifr_ifru.ifru_flags[0]).
2001-10-15 20:06:34 +00:00
Bruce Evans
cba41f69e5 Backed out the quick fixes for the transient breakage of <sys/mount.h>
in rev.1.106 of the latter (don't include <sys/socket.h> and/or
<net/radix.h> just to work around bugs in <sys/mount.h>).
2001-10-13 06:05:37 +00:00
Matt Jacob
6b89c0be2e roll out last change 2001-10-12 02:30:53 +00:00