Remove svn:mergeinfo carried over from stable/9.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Direct commit to stable branch to fix ABI breakage:

In r227839, when removing libkvm dependency on procfs(5),
kvm_uread() function, used for reading from /proc/pid/mem, was
removed too. This change broke ABI.

Bring kvm_uread() back so that the ABI is kept. In head soname is
going to be bumped instead.

Reported by: rmh
Discussed on: arch
Suggested by: jilles

MFC r250231: libkvm: Make second /dev/null file descriptor close-on-exec as
well.

MFC r250230: libkvm: Use O_CLOEXEC instead of separate fcntl(F_SETFD) call.

MFC r241303: kvm_getprocs: gracefully handle errors from kvm_deadprocs

MFC r241302: kvm_proclist: ignore processes in larvae state

MFC r235286:

General mdoc(7) and typo fixes.

PR: 167734

MFC r230873:

Try to avoid ambiguity when sysctl returns ENOMEM additionally
checking the returned oldlen: when ENOMEM is due to the supplied
buffer being too short the return oldlen is equal to buffer size.

Without this additional check kvm_getprocs() gets stuck in loop if the
returned ENOMEM was due the exceeded memorylocked limit. This is
easily can be observed running `limits -l 1k top'.

Submitted by: Andrey Zonov <andrey zonov org>

MFC r227839, r230146:

r227839:

Now kvm_getenvv() and kvm_getargv() don't need procfs(5).

r230146:

In kvm_argv(), the case when the supplied buffer was too short to hold the
requested value was handled incorrectly, and the function retuned NULL
instead of the truncated result.

Fix this and also remove unnecessary check for buf != NULL, which alway
retuns true.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Add support for PBVM addresses. In a nutshell this means:
o get the physical address and size of the PBVM page table. This
can be found in the bootinfo structure, of which the physical
address is recorded as the ELF entry point.
o translate region 4 virtual addresses to physical addresses using
the PBVM page table.

In _kvm_kvatop() make the distinction between physical address and
core file offset a little clearer to avoid confusion. To further
enhance readability, always store the translated address into pa
so that it's obvious how the translation from va to pa happened.

Approved by: re (blanket)

Rename ki_ocomm to ki_tdname and OCOMMLEN to TDNAMLEN.
Provide backward compatibility defines under BURN_BRIDGES.

Suggested by: jhb
Reviewed by: emaste
Sponsored by: Sandvine Incorporated
Approved by: re (kib)

With retirement of cpumask_t and usage of cpuset_t for representing a
mask of CPUs, pc_other_cpus and pc_cpumask become highly inefficient.

Remove them and replace their usage with custom pc_cpuid magic (as,
atm, pc_cpumask can be easilly represented by (1 << pc_cpuid) and
pc_other_cpus by (all_cpus & ~(1 << pc_cpuid))).

This change is not targeted for MFC because of struct pcpu members
removal and dependency by cpumask_t retirement.

MD review by: marcel, marius, alc
Tested by: pluknet
MD testing by: marcel, marius, gonzo, andreast

etire the cpumask_t type and replace it with cpuset_t usage.

This is intended to fix the bug where cpu mask objects are
capped to 32. MAXCPU, then, can now arbitrarely bumped to whatever
value. Anyway, as long as several structures in the kernel are
statically allocated and sized as MAXCPU, it is suggested to keep it
as low as possible for the time being.

Technical notes on this commit itself:
- More functions to handle with cpuset_t objects are introduced.
The most notable are cpusetobj_ffs() (which calculates a ffs(3)
for a cpuset_t object), cpusetobj_strprint() (which prepares a string
representing a cpuset_t object) and cpusetobj_strscan() (which
creates a valid cpuset_t starting from a string representation).
- pc_cpumask and pc_other_cpus are target to be removed soon.
With the moving from cpumask_t to cpuset_t they are now inefficient
and not really useful. Anyway, for the time being, please note that
access to pcpu datas is protected by sched_pin() in order to avoid
migrating the CPU while reading more than one (possible) word
- Please note that size of cpuset_t objects may differ between kernel
and userland. While this is not directly related to the patch itself,
it is good to understand that concept and possibly use the patch
as a reference on how to deal with cpuset_t objects in userland, when
accessing kernland members.
- KTR_CPUMASK is changed and now is represented through a string, to be
set as the example reported in NOTES.

Please additively note that no MAXCPU is bumped in this patch, but
private testing has been done until to MAXCPU=128 on a real 8x8x2(htt)
machine (amd64).

Please note that the FreeBSD version is not yet bumped because of
the upcoming pcpu changes. However, note that this patch is not
targeted for MFC.

People to thank for the time spent on this patch:
- sbruno, pluknet and Nicholas Esborn (nick AT desert DOT net) tested
several revision of the patches and really helped in improving
stability of this work.
- marius fixed several bugs in the sparc64 implementation and reviewed
patches related to ktr.
- jeff and jhb discussed the basic approach followed.
- kib and marcel made targeted review on some specific part of the
patch.
- marius, art, nwhitehorn and andreast reviewed MD specific part of
the patch.
- marius, andreast, gonzo, nwhitehorn and jceel tested MD specific
implementations of the patch.
- Other people have made contributions on other patches that have been
already committed and have been listed separately.

Companies that should be mentioned for having participated at several
degrees:
- Yahoo! for having offered the machines used for testing on big
count of CPUs.
- The FreeBSD Foundation for having sponsored my devsummit attendance,
which has been instrumental.
- Sandvine for having offered offices and infrastructure during
development.

(I really hope I didn't forget anyone, if it happened I apologize in
advance).

Disconnect sun4v architecture from the three.

Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.

Reviewed by: marius
Tested by: sbruno
Approved by: re

libkvm: fix logic inversion introduced with last commit

Reported by: Brandon Gooch <jamesbrandongooch@gmail.com>
Pointy hat to: uqs

libkvm: Unbreak build for powerpc64/powerpc

This slipped through my testing due to the recent roto-tiling of the
ARCH/TARGET parts that I need to catch up with. Mea culpa.

libkvm: fix process runtime calculation on crashdumps

Fix a long standing bug, where the procs ticks where assumed to be in
us. Instead, read cpu_tick_frequency from the kernel and use the same
logic to convert runtime. This is still too optimistic in that it
assumes cpu_tick_frequency is available and fixed. Since this function
is only called on crashdumps, I think we can live with that. Testing has
shown the values to be correct for different kern.hz inside Virtualbox.

Bump WARNS. Alignment issues on some archs mean this is still at 3.

Reviewed by: bde

libkvm code janitoring

- make WARNS=6 clean for archs w/o strict alignment requirments
- add const, ANSIfy, remove unused vars, cast types for comparison
- thanks to differing definitions of VM_MIN_ADDRESS across our archs, we
need to trick the compiler to not complain about signedness. We could
either fix VM_MIN_ADDRESS to always be a simple integer or make the
check conditional on $ARCH.

Closes PRs: kern/42386, kern/83364
Reviewed by: bde

Revert most of r210764, now that mdocml does the right
thing with empty quotation macros.

Requested by: Alex Kozlov

Similar to sys/net/vnet.h, define the linker set name for sys/sys/pcpu.h
as a macro, and use it instead of literal strings.

amd64: introduce minidump version 2

After KVA space was increased to 512GB on amd64 it became impractical
to use PTEs as entries in the minidump map of dumped pages, because size
of that map alone would already be 1GB.
Instead, we now use PDEs as page map entries and employ two stage lookup
in libkvm: virtual address -> PDE -> PTE -> physical address. PTEs are
now dumped as regular pages. Fixed page map size now is 2MB.

libkvm keeps support for accessing amd64 minidumps of version 1.
Support for 1GB pages is added.

Many thanks to Alan Cox for his guidance, numerous reviews, suggestions,
enhancments and corrections.

Reviewed by: alc [kernel part]
MFC after: 15 days

Add minidump support for MIPS

Repair some build breakage introduced in r211725 and garbage collect some
code made obsolete in the same commit.

MFtbemd:

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

mdoc: make sure to pass at least one argument to quotation macros

64-bit PowerPC KVM support.

Much closer approximation of the kernel's calculation of this value.

Reviewed by: alc
Obtained from: Yahoo Inc.

kvm(3): Mention that some of the functions use sysctl(3) instead of kmem.

Additionally, because of sysctl(3) use (which is generally good), behaviour
for crash dumps differs slightly from behaviour for live kernels and this
will probably never be fixed entirely, so weaken that claim.

MFC after: 1 week

Fix several typos in macros or macro misusage.

Found by: make manlint
Reviewed by: ru
Approved by: philip (mentor)

Not all programs including kvm.h include the necessary headers to use
u_int, so prefer unsigned int.

MFC after: 6 days
Pointed out by: bz, kib, Mr Tinderbox

A first cut at teaching libkvm how to deal with dynamic per-CPU storage
(DPCPU):

A new API, kvm_dpcpu_setcpu(3), selects the active CPU for the purposes
of DPCPU. Calls to kvm_nlist(3) will automatically translate DPCPU
symbols and return a pointer to the current CPU's version of the data.
Consumers needing to read the same symbol on several CPUs will invoke a
series of setcpu/nlist calls, one per CPU of interest.

This addition makes it possible for tools like netstat(1) to query the
values of DPCPU variables during crashdump analysis, and is based on
similar code handling virtualized global variables.

MFC after: 1 week
Sponsored by: Juniper Networks, Inc.

Fix typo in comment.

MFC after: 3 days

Build lib/ with WARNS=6 by default.

Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.

I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.

Add a missing else that negated the truncation of ki_ngroups to
NGROUPS.

Submitted by: Dmitry Pryanishnikov <lynx dot ripe at gmail dot com>

Fix a copy-paste bug when reading data from the last 3 (7 for PAE) bytes of
a page mapped by a large page in the kernel.

Submitted by: Dorr H. Clark dclark of engr.scu.edu
MFC after: 1 week

cr_groups is no longer embedded in struct ucred and is instead stored
in a seperate array. As such we need to use kvm_read rather than bcopy
to populate the ki_groups field.

This fixes a crash when running ps -ax on a coredump.

Reported by: brucec
Tested by: brucec
MFC after: 3 days

Rather than replicating the maths from the kernel, use the
value the kernel calculated directly as we already read it
with struct vnet. This will make kvm_vnet.c more resilent
in case of possible kernel changes.

Reviewed by: rwatson
Approved by: re (kib)

Merge the remainder of kern_vimage.c and vimage.h into vnet.c and
vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
virtual network stacks. Minor cleanups are done in the process,
and comments updated to reflect these changes.

Reviewed by: bz
Approved by: re (vimage blanket)

Revert the changes to struct kinfo_proc in r194498. Instead, fill
in up to 16 (KI_NGROUPS) values and steal a bit from ki_cr_flags
(all bits currently unused) to indicate overflow with the new flag
KI_CRF_GRP_OVERFLOW.

This fixes procstat -s.

Approved by: re (kib)

Make libkvm work on live systems and crashdumps with and
without VIMAGE virtualization in the kernel.

If we cannot resolve a symbol try to see if we can find it with
prefix of the virtualized subsystem, currently only "vnet_entry"
by identifying either the vnet of the current process for a
live system or the vnet of proc0 (or of dumptid if compiled
in a non-default way).

The way this is done currently allows us to only touch libkvm
but no single application. Once we are going to virtualize more
subsystems we will have to review this decision for better scaling.

Submitted by: rwatson (initial version of kvm_vnet.c, lots of ideas)
Reviewed by: rwatson
Approved by: re (kib)

Rework the credential code to support larger values of NGROUPS and
NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024
and 1023 respectively. (Previously they were equal, but under a close
reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it
is the number of supplemental groups, not total number of groups.)

The bulk of the change consists of converting the struct ucred member
cr_groups from a static array to a pointer. Do the equivalent in
kinfo_proc.

Introduce new interfaces crcopysafe() and crsetgroups() for duplicating
a process credential before modifying it and for setting group lists
respectively. Both interfaces take care for the details of allocating
groups array. crsetgroups() takes care of truncating the group list
to the current maximum (NGROUPS) if necessary. In the future,
crsetgroups() may be responsible for insuring invariants such as sorting
the supplemental groups to allow groupmember() to be implemented as a
binary search.

Because we can not change struct xucred without breaking application
ABIs, we leave it alone and introduce a new XU_NGROUPS value which is
always 16 and is to be used or NGRPS as appropriate for things such as
NFS which need to use no more than 16 groups. When feasible, truncate
the group list rather than generating an error.

Minor changes:
- Reduce the number of hand rolled versions of groupmember().
- Do not assign to both cr_gid and cr_groups[0].
- Modify ipfw to cache ucreds instead of part of their contents since
they are immutable once referenced by more than one entity.

Submitted by: Isilon Systems (initial implementation)
X-MFC after: never
PR: bin/113398 kern/133867

Fix missing includes of <string.h>, to silence some compiler warnings.

Submitted by: Pawel Worach

Add support for PowerPC kernel core files. This commit only adds
support for virtual core files (aka minidumps). physical core
files are not supported.

The implementation is cross-tool ready and can be used in a non-
powerpc hosted debugger to analyze PowerPC core files. It also
accepts core files that still have the dump header, as can be
the case within Juniper where TFTP-based kernel core files are
supported and savecore is not used to "extract" the core file
from some dump device.

Obtained from: Juniper Networks, Inc.

MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
on cluster machines as well as all the testers and people
who provided feedback the last months on freebsd-jail and
other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by: (see above)
MFC after: 3 months (this is just so that I get the mail)
X-MFC Before: 7.2-RELEASE if possible

Support kernel crash mini dumps on ARM architecture.

Obtained from: Juniper Networks, Semihalf

Reduce code duplication: use calloc() intead of malloc()
and memset afterward.

_kvm_malloc allocates memory through calloc() which
returns zeroed memory, so don't redo the initialization.

Add a "CACHING" section regarding the internal caching of kernel variables
and the ability to clear that cache.

Add a new routine kvm_getcptime(3) for fetching the equivalent of
'kern.cp_time'. For a live kernel it uses the sysctl. For a crashdump,
it first checks to see if the kernel has a 'cp_time' global symbol. If
it does, it uses that. If that doesn't work, when it uses the recently
added kvm_getmaxcpu(3) and kvm_getpcpu(3) routines to walk all the CPUs
and sum up their counters.

MFC after: 1 week

Add two new routines to libkvm for working with per-CPU data:
kvm_getmaxcpu() and kvm_getpcpu().

MFC after: 1 week

First cut at doing the kvm file needed for mips.

Obtained from: gonzo@

Use _WANT_FILE to make struct file visible from userland. This is
similar to _WANT_UCRED and _WANT_PRISON and seems to be much nicer than
defining _KERNEL.
It is also needed for my sys/refcount.h change going in soon.

- Don't inspect the P_SA flag. It's being removed.

Plug memory leaks that is observed when argbuf or argspc is used in the
context.

Submitted by: Michal Vranek <michal.vranek seznam cz>
PR: bin/118380
MFC after: 1 month

- Update kvm_deadfiles to be compatible with the new system which has no
global list of all files.
- Mark kvm_getfiles() as broken since the live version exports struct xfile
with no filelist at the head and does so incorrectly and the deadfiles
version exports struct file with a filelist at the head. It is not known
if either version works or complies to the manpage.

Aparrently MACXOCOMLEN exisrts only on my machine

Introduce a way to make pure kernal threads.
kthread_add() takes the same parameters as the old kthread_create()
plus a pointer to a process structure, and adds a kernel thread
to that process.

kproc_kthread_add() takes the parameters for kthread_add,
plus a process name and a pointer to a pointer to a process instead of just
a pointer, and if the proc * is NULL, it creates the process to the
specifications required, before adding the thread to it.

All other old kthread_xxx() calls return, but act on (struct thread *)
instead of (struct proc *). One reason to change the name is so that
any old kernel modules that are lying around and expect kthread_create()
to make a process will not just accidentally link.

fix top to show kernel threads by their thread name in -SH mode
add a tdnam formatting option to ps to show thread names.

make all idle threads actual kthreads and put them into their own idled process.
make all interrupt threads kthreads and put them in an interd process
(mainly for aesthetic and accounting reasons)
rename proc 0 to be 'kernel' and it's swapper thread is now 'swapper'

man page fixes to follow.

- When using kvm use the new conversion method to derive swtime.

Approved by: re

- Move all of the PS_ flags into either p_flag or td_flags.
- p_sflag was mostly protected by PROC_LOCK rather than the PROC_SLOCK or
previously the sched_lock. These bugs have existed for some time.
- Allow swapout to try each thread in a process individually and then
swapin the whole process if any of these fail. This allows us to move
most scheduler related swap flags into td_flags.
- Keep ki_sflag for backwards compat but change all in source tools to
use the new and more correct location of P_INMEM.

Reported by: pho
Reviewed by: attilio, kib
Approved by: re (kensmith)

Re-enable raw dump format support on i386 and amd64 for /dev/fwmem.

- Work-around the already partially broken rusage support in kvm by
completely disabling it until a full solution is agreed upon.

Pointy hat to: me

Add a level of indirection to the kernel PTE table. The old
scheme allowed for 1024 PTE pages, each containing 256 PTEs.
This yielded 2GB of KVA. This is not enough to boot a kernel
on a 16GB box and in general too low for a 64-bit machine.
By adding a level of indirection we now have 1024 2nd-level
directory pages, each capable of supporting 2GB of KVA. This
brings the grand total to 2TB of KVA.

- Move 'struct swdevt' back into swap_pager.h and expose it to userland.
- Restore support for fetching swap information from crash dumps via
kvm_get_swapinfo(3) to fix pstat -T/-s on crash dumps.

Reviewed by: arch@, phk
MFC after: 1 week

Per Olivier Houchard, use the proper license for this file. He
bogusly used the kvm_powerpc.c file as a template for the license, but
then either wrote the code himself, or cribbed it from the kvm_i386
file. The only thing from the kvm_powerpc.c file was the license.
Correct this mistake with his blessing.

Remove the advertising clause. UCB did this some time ago, but these
files were never updated to reflect that.

MFC After: 2 days

remove already commented out code

Make KSE a kernel option, turned on by default in all GENERIC
kernel configs except sun4v (which doesn't process signals properly
with KSE).

Reviewed by: davidxu@

unbreak build for sparc64 etc.
TARGET won't be defined on non subarches

Approved by: rwatson (mentor)
Reviewed by: jmg

buildworld fixes for sun4v
not sure why pmap.c is included as it is unchanged

Approved by: rwatson (mentor)
Reviewed by: jmg

Don't forget to set internal error message in kvm_nlist().

Approved by: cognet (mentor)

Remove alpha-specific stuff.

Rev. 1.44 of this file didn't introduce a right solution,
but we don't seem to have one yet, so just add an XXX comment on
passing rux_runtime to bintime2timeval() wrongly.

Spotted by: gcc(1) (warning)

Include strings.h for bzero()

Teach libkvm how to read minidumps. It turns out that minidumps are
far more convenient for libkvm to work with because of the page table
block at the beginning. As a result, the MD code is smaller.

libkvm will automatically detect old vs mini dumps on i386 and amd64.

libkvm will handle i386 PAE and non-PAE modes. There is a PAE flag in
the i386 minidump header to signal the width of the entries in the
page table block.

Other convenient values are also present, such as kernbase and the direct
map addresses on amd64.

Validate that the supplied file is not empty before trying mmap(2) it
and access the pages associated with it.

Submitted by: Wojciech A. Koszek
PR: bin/91411
MFC after: 1 week

Fix a well duplicated fencepost error that stopped crashdumps being
readable on certain random memory configurations. If the libkvm consumer
tried to read something that was in the very last pdpe, pde or pte slot,
it would bogusly fail.

This is broken in RELENG_6 too.

libkvm bits for arm.

Fix the alpha build by using the correct argument types for _kvm_kvatop().

Submitted by: marcel
Approved by: re (implicit)

Match _kvm_kvatop to it's prototype in kvm_i386.c. This unbreaks
the build.

Approved by: re

Support crash dumps > 4GB in size on 32 bit platforms. _kvm_kvatop()
returned an lseek offset in a "u_long *" value, which can't express >4GB
offsets on 32 bit machines (eg: PAE). Change to "off_t *" for all.

Support ELF crashdumps on i386 and amd64.

Support PAE crashdumps on i386. This is done by auto-detecting the
presence of the IdlePDPT which means that PAE is active.

I used Marcel's _kvm_pa2off strategy and ELF header reader for ELF support
on amd64. Paul Saab ported the amd64 changes to i386 and we implemented
the PAE support from there.

Note that gdb6 in the src tree uses whatever libkvm supports. If you want
to debug an old crash dump, you might want to keep an old libkvm.so handy
and use LD_PRELOAD or the like. This does not detect the old raw dump
format.

Approved by: re

Set ki_tdev to NODEV rather than NULL.

Approved by: re

Make kvm(3) aware of ki_jid field.

Reviewed by: gad
MFC after: 3 days

Dike out unwarranted reference to si_udev.

Sort sections.

In preparation to remove U areas, don't refer to p_uarea in libkvm.

Reviewed by: arch@

Remove un-needed call to close(2). The fd that close is being
called on is invalid and has no use.

Reviewed by: smkelly

Document the fact that kvm_getenvv(3) requires procfs to be mounted
on /proc in order to operate correctly.

Reviewed by: simon@, wes@

Belatedly catch up with the dev_t/cdev changes from a few months back.
Extract the struct cdev pointer and the tty device from inside rather than
incorrectly casting the 'struct cdev *' pointer to a 'dev_t' int. Not
that this was particularly important since it was only used for reading
vmcore files.

- Fix the compile to chase the p_rux changes.
- Add a comment noting that the ru_[us]times values being read aren't
actually valid and need to be computed from the raw values.

Submitted by: many (1)

Redefine a PTE as a 64-bit integral type instead of a struct of
bit-fields. Unify the PTE defines accordingly and update all
uses.

The offset argument to mmap(2) is not a pointer. Use 0 instead of NULL.

Refactor a bunch of scheduler code to give basically the same behaviour
but with slightly cleaned up interfaces.

The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.

The KSE (or td_sched) structure is now allocated per thread and has no
allocation code of its own.

Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.

Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.

The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.

A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.

Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.

Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by: scottl, peter
MFC after: 1 week

Expand the license referenced indirectly inline.

Remove stale code protected by #ifdef sparc. GCC 3.4.x adds sparc to
predefined symbols on all SPARC platforms and FreeBSD follows the crowd.

Mechanically kill hard sentence breaks.

Markup, grammar, punctuation.

Fix a test of bit-flag "P_SA" by adding parenthesis around the expression.

Submitted by: Cyrille Lefevre

Replace a call to strncpy() with a call to strlcpy()

Submitted by: Cyrille Lefevre

Fill in the some new fields 'struct kinfo_proc', namely ki_childstime,
ki_childutime, and ki_emul. Also uses the timeradd() macro to correct
the calculation of ki_childtime. That will correct the value returned
when ki_childtime.tv_usec > 1,000,000.

This also implements a new KERN_PROC_GID option for kvm_getprocs().
It also implements the KERN_PROC_RGID and KERN_PROC_SESSION options
which were added to sys/kern/kern_proc.c revision 1.203.

PR: bin/65803 (a very tiny piece of the PR)
Submitted by: Cyrille Lefevre

Second half of the dev_t cleanup.

The big lines are:
NODEV -> NULL
NOUDEV -> NODEV
udev_t -> dev_t
udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to kernel
space struct cdev etc.

This library has to change whenever the kernel process structure changes.

Avoid assignments to cast expressions.

Reviewed by: md5
Approved by: das (mentor)

Implement crashdump decoding for AMD64 as well, now that I have finally
got a sample to test against.

Import libkvm MD file for arm.

Fix a warning: compare u_long ps_strings to 0 instead of NULL.

Document that kvm_open(3) also accepts "/dev/null" as a special
"corefile" argument, to access the running system via sysctl(3)
if possible, thus not requring special setgid privileges.

Document that libkvm also uses /dev/kmem, to access KVM.

Update man page to reflect additional flag to allow selection of threads.

Teach kvm_getprocs() to recognize a sysctl flag for including threads.

Allow to specify a character special device as a core file.

This enable us to use /dev/fwmem* as a core file.
e.g.
ps -M /dev/fwmem0.0 -N kernel.debug
dmesg -M /dev/fwmem0.0 -N kernel.debug
gdb -k -c /dev/fwmem0.0 kernel.debug
You need to set target EUI64 in hw.firewire.fwmem.eui64_hi/lo before
opening the device. On the target arch, (PCI) bus address must be
equivalent to physical address.
(We cannot use this for sparc64 because of IOMMU.)

No objection in: -audit

Fixed some style bugs in the removal of __P(()). Blind removal of
spaces before __P(()) outdented continuation lines to column 0.

Document KERN_PROC_PROC, update KERN_PROC_ALL description.

Use the 3-component version of the KERN_PROC_PROC sysctl.

style.Makefile(5)

Stage 3 of dynamic root support. Make all the libraries needed to run
binaries in /bin and /sbin installed in /lib. Only the versioned files
reside in /lib, the .so symlink continues to live /usr/lib so the
toolchain doesn't need to be modified.

Remove unnecssary <vm/swap_pager.h> includes.

These were probably not cleaned up back in whatever murky past these
files were split into separate files.

Remove various unused variables, prototypes and local variables.

Disable and lobotomize the kvm image reading swapinfo code, the kernel
layout is about to change.

The sysctl based method still returns correct information.

Retire the SWIF_DUMP_TREE code, this is in the way for a rework of
the swap_pager layout.

Unifdef -UDEBUG_SWAPINFO The kernel data structures are about to change.

P_THREADED was renamed to P_SA, follow up.

Revamp of the syscall path, exception and context handling. The
prime objectives are:
o Implement a syscall path based on the epc inststruction (see
sys/ia64/ia64/syscall.s).
o Revisit the places were we need to save and restore registers
and define those contexts in terms of the register sets (see
sys/ia64/include/_regset.h).

Secundairy objectives:
o Remove the requirement to use contigmalloc for kernel stacks.
o Better handling of the high FP registers for SMP systems.
o Switch to the new cpu_switch() and cpu_throw() semantics.
o Add a good unwinder to reconstruct contexts for the rare
cases we need to (see sys/contrib/ia64/libuwx)

Many files are affected by this change. Functionally it boils
down to:
o The EPC syscall doesn't preserve registers it does not need
to preserve and places the arguments differently on the stack.
This affects libc and truss.
o The address of the kernel page directory (kptdir) had to
be unstaticized for use by the nested TLB fault handler.
The name has been changed to ia64_kptdir to avoid conflicts.
The renaming affects libkvm.
o The trapframe only contains the special registers and the
scratch registers. For syscalls using the EPC syscall path
no scratch registers are saved. This affects all places where
the trapframe is accessed. Most notably the unaligned access
handler, the signal delivery code and the debugger.
o Context switching only partly saves the special registers
and the preserved registers. This affects cpu_switch() and
triggered the move to the new semantics, which additionally
affects cpu_throw().
o The high FP registers are either in the PCB or on some
CPU. context switching for them is done lazily. This affects
trap().
o The mcontext has room for all registers, but not all of them
have to be defined in all cases. This mostly affects signal
delivery code now. The *context syscalls are as of yet still
unimplemented.

Many details went into the removal of the requirement to use
contigmalloc for kernel stacks. The details are mostly CPU
specific and limited to exception_save() and exception_restore().
The few places where we create, destroy or switch stacks were
mostly simplified by not having to construct physical addresses
and additionally saving the virtual addresses for later use.

Besides more efficient context saving and restoring, which of
course yields a noticable speedup, this also fixes the dreaded
SMP bootup problem as a side-effect. The details of which are
still not fully understood.

This change includes all the necessary backward compatibility
code to have it handle older userland binaries that use the
break instruction for syscalls. Support for break-based syscalls
has been pessimized in favor of a clean implementation. Due to
the overall better performance of the kernel, this will still
be notived as an improvement if it's noticed at all.

Approved by: re@ (jhb)

s/procsig/sigacts/ to catch up to procsig and sigacts changes in the kernel.

Approved by: re (scottl)

Bandaid for world. jhb gets the pointy hat here and he needs to look at
this.

Approved by: re (scottl)

AMD64 support; repocopied from i386

Add sys/user.h to the list of includes. Without it you lack a definition of
'struct kinfo_proc' for calls to kvm_getargv() and kvm_getenvv().

PR: 51322

Catch up with the kernel. Move the current cpu indicator to the thread.

- Spell SIGSETOR correctly.

- Catch up with kernel signal changes.

The .Fn function
The .Fa argument

Catch up to p_tracep -> p_tracevp rename to unbreak world.

Pointy hat to: jhb

Change the process flags P_KSES to be P_THREADED.
This is just a cosmetic change but I've been meaning to do it for about a year.

Remove all use of the LOG2() macro/inline, undoing some non-optimal cruft
that crept in recently. GCC will optimize the divides and multiplies for us.

Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU>
MFC after: 1 day

Make struct swblock kernel only, to make vm/swap_pager.h userland includable.
Move struct swdevt from sys/conf.h to the more appropriate vm/swap_pager.h.
Adjust #include use in libkvm and pstat(8) to match.

Teach libkvm to deal with direct mapped addresses.

mdoc(7) police: Deal with self-xrefs.

Consistently mark std(in|out|err) with .Dv, because that's how they
are marked up in stdio(3), and because they are defined expressions
of type "FILE *".

Approved by: re

Implement working on ELF corefiles. Use kvm_read() when reading
memory while mapping a virtual address to a physical address.
This allows us to work with virtual addresses for page tables,
provided it doesn't cause infinite recursion. Currently all
page tables are direct mapped.

Adapt to handle the new sparc64 core dump format correctly.

Reviewed by: jake

Catch up to SMTX -> SLOCK changes.

Ressurect libkvm use of the bitmasked signal list in the kernel, now that
reliable signal queues are gone.

Fix typo, should zero the kinfo_proc's siglist, not the real one's - the real
one doesn't have one.

Submitted by: jake, scottl
Big pointed hat that lands one in the badcommitters box to: jmallett

The list of queued signals is not, can not, and will not be exported to the
userland. If someone wants to implement a backup p_siglist in the kernel
for compatability and to export one could. For now, just tell KVM to hand
an empty signal set off to the userland.

Fixed messes involving $FreeBSD$ starting with one left in the copyright
after adding __FBSDID().

Garbage-collected kvm_readswap(). This was once used by kvm_uread(), but
kvm_uread() now just reads /proc/<pid>/mem and procfs hopefully handles
swapped out pages.

Allocate KSEs and KSEGRPs separatly and remove them from the proc structure.
next step is to allow > 1 to be allocated per process. This would give
multi-processor threads. (when the rest of the infrastructure is
in place)

While doing this I noticed libkvm and sys/kern/kern_proc.c:fill_kinfo_proc
are diverging more than they should.. corrective action needed soon.

In kvm_openfiles/kvm_open, mark the file descriptors as close-on-exec.
Applications can not do this themselves, as the descriptors are hidden
behind the opaque `kvm_t' type.

Completely redo thread states.

Reviewed by: davidxu@freebsd.org

Hopefully unbreak world. ke_slptime is gone. It should really have been
looking at p_ksegrp.kg_slptime anyway.

Allow one to grab the definition of struct ucred by defining _WANT_UCRED
instead of forcing _KERNEL.

Move the include of sys/_label.h in ucred.h under the
_KERNEL || _WANT_UCRED case.

&x is not a format string

o Merge <machine/ansi.h> and <machine/types.h> into a new header
called <machine/_types.h>.
o <machine/ansi.h> will continue to live so it can define MD clock
macros, which are only MD because of gratuitous differences between
architectures.
o Change all headers to make use of this. This mainly involves
changing:
#ifdef _BSD_FOO_T_
typedef _BSD_FOO_T_ foo_t;
#undef _BSD_FOO_T_
#endif
to:
#ifndef _FOO_T_DECLARED
typedef __foo_t foo_t;
#define _FOO_T_DECLARED
#endif

Concept by: bde
Reviewed by: jake, obrien

Hide 'struct ucred' behind '#ifdef _KERNEL', this should stop userland
from attempting to use it for good. There is a catch, kvm_proc.c needs
to '#define _KERNEL' to get at the ucred.

Requested by: rwatson

Auto size available kernel virtual address space based on phsyical memory
size. This avoids blowing out kva in kmeminit() on large memory machines
(4 gigs or more).

Reviewed by: tmm

Don't even read in the thread if it is a zombie process.

grow a brain and do this right.

Don't follow non existant thread pointers (e.g. for zombies)

Part 1 of KSE-III

The ability to schedule multiple threads per process
(one one cpu) by making ALL system calls optionally asynchronous.
to come: ia64 and power-pc patches, patches for gdb, test program (in tools)

Reviewed by: Almost everyone who counts
(at various times, peter, jhb, matt, alfred, mini, bernd,
and a cast of thousands)

NOTE: this is still Beta code, and contains lots of debugging stuff.
expect slight instability in signals..

Assume __STDC__, remove non-__STDC__ code.

Submitted by: keramida

Catch up to tte.h changes.

Stub out _kvm_mdopen, we don't the same constants as NetBSD

Add a PowerPC machdep for kvm.

Obtained from: NetBSD (rev 1.4, pre-UVM)

Fix (for the second time) kvm_getprocs() for the case where no
processes match the given criteria. Since revision 1.60 of malloc.c,
malloc() and friends return an invalid pointer when given a size of 0.
kvm_getprocs() uses sysctl() with a NULL oldp argument to get an
initial size, but does not check whether it's 0 before passing it to
realloc() (via _kvm_realloc()). Before the aforementioned malloc()
change, this resulted in a minimal allocation made and a valid poitner
returned, but now results in an invalid, but non-NULL, pointer being
returned. When this is passed to sysctl(), the latter returns EFAULT
(as it should).

Remove multi-line __P() usage.

Remove __P() usage.

Remove 'register' keyword.

Also blindly attempt to fix broken world with respect to proc.p_runtime
changes.

I THINK this fixes 'make world'
I'll know as soon as I re-import it and compile it.. :-)
There is no longer a 'pri' strict in the proc struct.
the fields are scattered between the ksegrp and thread in question.

pre-emptively fix a KSE/M3 problem.

Make a slight change so that libkvm reaches the main thread via the
linked list, rather than assuming it is in the proc structure. Both
conditions are true in -current but only the first will be true in
the KSE M3 world.

Finish cleanup in kvm.c revisions 1.10 and 1.11 -- mark sf (swapfile)
argument to kvm_open() and kvm_openfiles() as unused.

BSD didn't read swap since kvm.c CSRG revision 5.21 (u-area is pageable
under new VM. no need to read from swap.)

The old !NEWVM code was removed in CSRG revision 5.23 (~ten years ago).

Adapt to new kernel tsb structure.

s/processes/files/ inherited from kvm_getprocs(3).

PR: docs/32252
Submitted by: tobez

Include sys/param.h instead of sys/types.h to get the definition of the
MIN() macro.

Pointy hat to: rwatson

o Cleanup of includes: user.h may be a catch-all, but that's not
entirely desirable. Back out previous commit, and clean up includes
to be more minimal.

Submitted by: bde

#include <sys/user.h> rather than individually including a plethora
of kernel include files, reducing the replication of kernel include
dependency information in userland.

Obtained from: TrustedBSD Project

libkvm for sparc64. Only works for kernel memory so far.

kern.ps_arg_max_cache is a long, not an int. I believe this is half of
what broke ps on ia64. It probably also broke on alpha, but the fallback
method of using lseek/read on /proc/*/mem to read ps_strings seems to
work there. It doesn't on ia64 yet.

Implement va->pa translation for kernel virtual addresses. This is
untested - it only seems to be used for crashdumps.

Partially port kvm to ia64 - virtual to physical translation is incomplete.

Backed out "Compensate for header dethreading [mistakes]" mistakes in
alpha files too.

Compensate for "Compensate for header dethreading" by backing it out.

mdoc(7) police: Use the new .In macro for #include statements.

Implement __FBSDID()

KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after: ha ha ha ha

Make ps -M corefile work again. This has been broken for quite some time.
kvm_proclist() was aborting when it saw the ithreads with no pgrp.

Dynamically adjust to the value of KERNBASE in a crashdump, with
a fallback for old kernels without the "kernbase" symbol.

Mark some functions as __printflike() and/or taking const char * arguments
instead of char *.

MFC after: 2 weeks

mdoc(7) police: s/BSD/.Bx/ where appropriate.

mdoc(7) police: fixed the "new sentence" bogons.

Remove whitespace at EOL.

mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

Change this to support the new way swap device information is exported
via sysctl, and clean up some style and (size_t != int) issues.

o Merge contents of struct pcred into struct ucred. Specifically, add the
real uid, saved uid, real gid, and saved gid to ucred, as well as the
pcred->pc_uidinfo, which was associated with the real uid, only rename
it to cr_ruidinfo so as not to conflict with cr_uidinfo, which
corresponds to the effective uid.
o Remove p_cred from struct proc; add p_ucred to struct proc, replacing
original macro that pointed.
p->p_ucred to p->p_cred->pc_ucred.
o Universally update code so that it makes use of ucred instead of pcred,
p->p_ucred instead of p->p_pcred, cr_ruidinfo instead of p_uidinfo,
cr_{r,sv}{u,g}id instead of p_*, etc.
o Remove pcred0 and its initialization from init_main.c; initialize
cr_ruidinfo there.
o Restruction many credential modification chunks to always crdup while
we figure out locking and optimizations; generally speaking, this
means moving to a structure like this:
newcred = crdup(oldcred);
...
p->p_ucred = newcred;
crfree(oldcred);
It's not race-free, but better than nothing. There are also races
in sys_process.c, all inter-process authorization, fork, exec, and
exit.
o Remove sigio->sio_ruid since sigio->sio_ucred now contains the ruid;
remove comments indicating that the old arrangement was a problem.
o Restructure exec1() a little to use newcred/oldcred arrangement, and
use improved uid management primitives.
o Clean up exit1() so as to do less work in credential cleanup due to
pcred removal.
o Clean up fork1() so as to do less work in credential cleanup and
allocation.
o Clean up ktrcanset() to take into account changes, and move to using
suser_xxx() instead of performing a direct uid==0 comparision.
o Improve commenting in various kern_prot.c credential modification
calls to better document current behavior. In a couple of places,
current behavior is a little questionable and we need to check
POSIX.1 to make sure it's "right". More commenting work still
remains to be done.
o Update credential management calls, such as crfree(), to take into
account new ruidinfo reference.
o Modify or add the following uid and gid helper routines:
change_euid()
change_egid()
change_ruid()
change_rgid()
change_svuid()
change_svgid()
In each case, the call now acts on a credential not a process, and as
such no longer requires more complicated process locking/etc. They
now assume the caller will do any necessary allocation of an
exclusive credential reference. Each is commented to document its
reference requirements.
o CANSIGIO() is simplified to require only credentials, not processes
and pcreds.
o Remove lots of (p_pcred==NULL) checks.
o Add an XXX to authorization code in nfs_lock.c, since it's
questionable, and needs to be considered carefully.
o Simplify posix4 authorization code to require only credentials, not
processes and pcreds. Note that this authorization, as well as
CANSIGIO(), needs to be updated to use the p_cansignal() and
p_cansched() centralized authorization routines, as they currently
do not take into account some desirable restrictions that are handled
by the centralized routines, as well as being inconsistent with other
similar authorization instances.
o Update libkvm to take these changes into account.

Obtained from: TrustedBSD Project
Reviewed by: green, bde, jhb, freebsd-arch, freebsd-audit

Removed -I${.CURDIR}/.../sys from CFLAGS.

Avoid dividing by zero if kd->procbase->ki_structsize is uninitalised.
(I'm testing the numerator rather than the denominator, which looks
weird, but is the right thing to do here).

Do the alpha dance for the change MarkM hath made on the i386 side.

Don't give a warning about "proc size mismatch" if no struct were
returned. (This arose on a list about a month ago when someone
found bogus warnings if they used "ps -Uuser_with_no_processes".)

Approved by: mckusick

Compensate for header dethreading.

MAN[1-9] -> MAN.

Find <libkvm.h> in the source tree. This helps standalone builds.

Adapt libkvm_getswapinfo() to make use of recently committed vm and swap
sysctls exporting swap information. When running on a live kernel,
the sysctl's will now be used instead of kvm_read, allowing consumers of
this interface to run without privilege (setgid kmem). Retain the
ability to run on coredumps, or on a kernel using kmem if explicitly
pointed at one.

A side effect of this change is that kvm_getswapinfo() is faster now in
the general case. If the SWIF_DUMP_TREE flag is given (pstat -ss does
this), the radix tree walker, which still uses kvm_read in any case, is
invoked, and therefore does require privilege.

Submitted by: Thomas Moestl <tmoestl@gmx.net>
Reviewed by: freebsd-audit

Catch up to new priority interface.

mdoc(7) police: split punctuation characters + misc fixes.

Add a new item to kinfo_proc: ki_sflag to mirror p_sflag.

Revert rev. 1.27. This file only included <sys/select.h> because of
brokenness introduced in <sys/select.h> rev. 1.8 which is now OBE.
<sys/tty.h> and <sys/selinfo.h> together do the right thing.

Prepare for mdoc(7)NG.

Use macro API to <sys/queue.h>

Change the proc information returned from the kernel so that it
no longer contains kernel specific data structures, but rather
only scalar values and structures that are already part of the
kernel/user interface, specifically rusage and rtprio. It no
longer contains proc, session, pcred, ucred, procsig, vmspace,
pstats, mtx, sigiolst, klist, callout, pasleep, or mdproc. If
any of these changed in size, ps, w, fstat, gcore, systat, and
top would all stop working. The new structure has over 200 bytes
of unassigned space for future values to be added, yet is nearly
100 bytes smaller per entry than the structure that it replaced.

Add `_PATH_DEVZERO'.
Use _PATH_* where where possible.

remove unneded sys/ucred.h include

Avoid use of direct troff requests in mdoc(7) manual pages.

Good, fixing the header showed incorrect usage of it! #define _KERNEL
here for the include of sys/select.h.

Limit the amount of data copied to the error buffer to _POSIX2_LINE_MAX.
This is the documented size which the user-provided buffer must be.

Remove obsolete reference to /var/db/kvm_kernel.db

Reviewed by: peter

Introduce .Lb macro to libkvm manpages.
Use .Pa macro for "enlighting" path

Remove unneeded #include

Change the return value of kvm_read/kvm_write to be -1 on error, to
match the documented interface.

Previously it returned 0 on error.

PR: bin/10511

-Wall, which caught a real bug where buflen wasn't being set properly.

Correct an error message presumably as a result of cut/paste.
kvm_getfiles() referred to itself as kvm_getprocs().

Repair misspelled `.Pp' directive:
.PP -> .Pp

Replace beforeinstall target with new variables used by .mk system.

Reviewed by: marcel, and make world

Fixed missing includes in synopsis. <sys/file.h> went missing when KERNEL
was not updated to _KERNEL. Actually including <sys/file.h> as specified
never actually worked, since a prerequisite was missing.

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.

Use kldsym(2) to lookup symbol values. This avoids the kvm_mkdb juggling
and is module aware. Yes, this means that kvm_nlist(3) will find symbols
in loaded modules. The emulation of the nlist struct is pretty crude but
seems to work well enough for all the users in the tree that I found.

Report swapdevices as cdevs rather than bdevs.

Remove unused dev2budev() function.

Introduce commandline caching in the kernel.

This fixes some nasty procfs problems for SMP, makes ps(1) run much faster,
and makes ps(1) even less dependent on /proc which will aid chroot and
jails alike.

To disable this facility and revert to previous behaviour:
sysctl -w kern.ps_arg_cache_limit=0

For full details see the current@FreeBSD.org mail-archives.

Delete the sf (swapfile) arg to an internal function that used to point to
/dev/drum but has not been used for a LONG time.
Add $FreeBSD$

Install <kvm.h> from here (after repo copy) so it's all in one package.

$Id$ -> $FreeBSD$

$Id$ -> $FreeBSD$

Don't open the swap file. The open descriptor for it hasn't been used
for over 5 years since we switched to using procfs for kvm_uread().
This cleanup was motivated by recent breakage of the default swap file
(/dev/drum) when swapon() has not been called.

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Tidy up references to <sys/rlist.h> and support for the old swap management
that went away in January.

Oops, the previous log message should have been:

Include <machine/ansi.h> so that this file is self-sufficient again.
Rev.1.6 doesn't do this as claimed unless <nlist.h> has nonstandard
pollution.

Cleaned up includes.

Declare mkstemps().

make libkvm capable of dealing with a crashdump on alphas
Reviewed by: Doug Rabson <dfr@nlsystems.com>

Don't use u_long in the synopsis, since u_long is not part of the kvm
interface.

From rev. 1.12 of usr.sbin/pstat/pstat.c by phk:
Reflect the fact that we do not swap on the first <dmmax> blocks of a
swapdev, to protect disklabels and other such magic stuff.

Handle case where no swap is configured

Removed evil typedef kvm_swap_t and all uses of it (not many).

Hoped for by: wollman

Fix swap radix tree dump formatting ( pstat -ss ), it was printing the
wrong radix for recursive subnodes.

Fixed missing cross reference to kvm_getfiles.

This man page may be overdoing the cross references by referencing
man pages that are just links to other pages that are referenced.

kvm_uread() is still completely undocumented in kvm*.3.

Fixed unsorting of SRCS and MAN3 in previous commit.

Sorted MLINKS.

Fixed unsorting of cross references in previous commit.

Oops, forgot this. Needed by libkvm.

Fix type-o's in manual

Add SWIF_DEV_PREFIX flag to add "/dev/..." to device name.

Implement kvm_getswapinfo() libkvm function. Will be used by
pstat, top, and systat.

<sys/types.h> isn't a prerequisite for <kvm.h>.

The previous commit was bogus. <stdlib.h> was never a prerequisite
for <kvm.h> or kvm_getloadavg(), and <sys/types.h> was only a
prerequisite for <kvm.h> when <kvm.h> was broken.

Declare size_t and ssize_t if they are not already declared, so that
<kvm.h> is self-sufficient again.

Moved typedefs and forward struct declarations out of __BEGIN_DECLS/
__END_DECLS.

Don't comment out the prototype for kvm_uread(). This was a 4 year
old kludge for previous breakage of self-sufficiency. The prototypwe
was broken instead.

Fixed bitrot (const poisoning) in the type of kvm_uread().

Fixed order of the declaration of kvm_uread().

Adjust for kern.ps_strings and PS_STRINGS not being a pointer. This
fixes a type mismatch in the call to kvm_uread(). The bug has gone
undetected for almost 3 years because kvm_uproc()'s protoype has been
disabled for almost 4 years.

Trust sysctlbyname() to work properly if it succeeds.

Fixed style bugs in revs. 1.19 and 1.22.

Add required #include references to manual page

Avoid the "Cannot allocate memory" problem that appears on heavily
loaded systems by retrying the sysctl() with a larger buffer if it
fails with ENOMEM. For good measure, allocate 10% more memory than
sysctl() claims is necessary.

PR: 8275
Reviewed by: David Greenman <dg@freebsd.org>

Adjust the declarations of kvm_read and kvm_write to match reality a little
closer.

Replace memory leaking instances of realloc with non-leaking reallocf.
In some cases replace if (a == null) a = malloc(x); else a =
realloc(a, x); with simple reallocf(a, x). Per ANSI-C, this is
guaranteed to be the same thing.

I've been running these on my system here w/o ill effects for some
time. However, the CTM-express is at part 6 of 34 for the CAM
changes, so I've not been able to do a build world with the CAM in the
tree with these changes. Shouldn't impact anything, but...

Change ${MACHINE} into ${MACHINE_ARCH} to support MACHINE=pc98.

The length argument to sysctl is now size_t.

Nuke unsupported architecture files

Add an alpha machdep for kvm. The vatop functions are stubbed out for
now (mainly because I haven't ported them from the NetBSD crash dump
environment).

Obtained from: NetBSD

Allow /dev/null as path for the "/dev/mem" file, and assume that people
know what they're doing if they do that. This will allow ps to use
the kvm_proc.c bits without having access to /dev/mem.

Fix kvm_proc.c to not need /dev/mem for access to argv/envp

Fixed bugs in the conversion of kvm to to use procfs in rev.1.3. All
are in kvm_uread():
- the setting of errno before checking it in the lseek() was lost.
- EOF handling was lost. kvm_uread() retried forever on EOF. EOF is
not really an error, but report it one as in rev.1.2.
- reporting of errno after a read error was lost.

Fixed style bugs in rev.1.3 and rev.1.12.

Not fixed: errno is not reported after lseek() failures.

-I${DESTDIR}/sys -> -I${.CURDIR}/../../sys.

Copy code from gnu/usr.bin/gdb/gdb/kvm-fbsd.c to deal with 4 MB pages.

Add ${DESTDIR} in front of absolute path.

Fill in parent process id when reading process information from a
memory dump. This fixes one of the problems noted in PR kern/3581.

Fixed #include and/or prototype bugs in synopsis.

Fixed #include and/or prototype bugs in synopsis.

Revert $FreeBSD$ to $Id$

Sort cross references.

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Fix the short description of kvm_getloadavg(3) to reflect
what the function really does.

Also fix a small mdoc problem I noticed while in there.

Obtained from: NetBSD-bugs (NetBSD PR#3077)

kvm_malloc:
When malloc fails. don't try to memset NULL pointer, it cause core dump
Replace malloc+memset with calloc, theoretically it can do some
optimization of zeroing process internally
Improve error diagnostic

Implement virtual-to-physical address mapping for the kvm library on
dead kernel debugging. The previous code was a "do nothing".

The most obvious side effect of this is that you can now do things like
this and reasonably expect them to work:
dmesg -M /var/crash/vmcore.3 -N /var/crash/kernel.3
ps -axl -M /var/crash/vmcore.3 -N /var/crash/kernel.3

A good deal of this was lifted from the gdb code to do this, as well as
from NetBSD's libkvm (which has completely different VM macros)

General -Wall warning cleanup, part I.
Submitted-By: Kent Vander Velden <graphix@iastate.edu>

Pass correct length OID to kernel for KERN_PROC_ALL.

NBPG -> PAGE_SIZE

From Lite2: proc and file LIST changes

If the two recently added sysctl variables exist, use those rather than
the statically compiled PS_STRINGS and USRSTACK variables. This prevents
programs using setproctitle from coredumping if the kernel VM is increased,
and stops libkvm users (w, ps, etc) from needing to be recompiled if only
the VM layout changes.

Add some missing MLINKS, correct some cross references, correct some
file locations and some minor formatting/style problems.

Another round of spelling fixes.

Extract the login name when doing a ps on a dead kernel.

Cosmetic cleanup and documentation of kvm_argv.. Hopefully the flow of
the routine can be much more easily understood now... :-)

phkmalloc strikes again! :-) Another use of un-cleared returns from
malloc squashed...

Updates to read the extra indirection in ps_strings. Note that any
static executables that depend on this will need to be relinked (ie: do
this before 'ps'), but the dynamic linked stuff should be OK (ie: 'w')

Obtained from: NetBSD (not much point reinventing the wheel.. :-)

Removed unnecessary include of <sys/tty.h>. tty.h apparently once had
some user interfaces in it. It no longer does.

41 headers must be implicitly included and one more (<sys/param.h>) must
be explicitly included before kvm_getprocs() can be used.

Update the man page for kvm_getprocs.3 to reflect our sysctl-based
kvm mechanism.

Submitted by: (Vic Abell) <abe@cc.purdue.edu>

Remove trailing whitespace.

Comment out declaration of kvm_uread until it can be fixed correctly.

Change u_long to unsigned long to be consistent.

libkvm exports kvm_uread(), so do declare it in the header file.
Got apparent by Philippe's -Wall patch for /usr/bin.

Cast the offset of one call to lseek() to off_t, as it's already done
in all other places here.

This is a hack, the interface should be changed to use off_t's
everywhere around, but this will require to update all the programs
that happen to use libkvm.

Fix previous fix to agree with the man page - don't report errors in
kvm_open() if errstr is NULL.

Remove some unused variables and fix two blatant core dump triggers.

A semicolon was lost.

From: "gj%pcs.dec.com@inet-gw-1.pa.dec.com" <garyj@rks32.pcs.dec.com>
Given the right circumstances, a call to kvm_open can result in a core
dump.

The diff belows fixes this (note that this change is already in the
NetBSD code). Could somebody apply this?

Gary J.
Submitted by: gj

Fix from Gary Jennejohn - use 'cp' not 'buf' in read call. Oops.

Added spare space on the usr stack. Used in ibcs2 emulation.

Don't include sys/exec.h.

Get rid of _PATH_UNIX completely; use getbootfile(3) instead.

DANGER WILL ROBINSON!
_PATH_UNIX is currently defined as the literal string "don't use this".
I am of two minds about this myself, but wanted to get something into the
tree as quickly as possible.

Made kvm routines use procfs to get out process data such as argument
strings.

Converted 'vmunix' to 'kernel'.

Make it work with our make macros.

Fix kvm_i386.c just enough to make it compile and return lots of errors
when called. Noop out swapread in kvm_proc.c as our vm system is
different.

This is a COPY of kvm_hp300.c, soon to be patched to sorta work with
the i386 port.

This commit was generated by cvs2svn to compensate for changes in r1573,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Include Sources