Commit Graph

234 Commits

Author SHA1 Message Date
csjp
4c05286a61 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
2006-01-15 20:30:13 +00:00
peter
e62b997c41 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.
2005-10-20 05:41:38 +00:00
cognet
6acbf22315 libkvm bits for arm. 2005-10-03 14:21:14 +00:00
scottl
a592644d4a Fix the alpha build by using the correct argument types for _kvm_kvatop().
Submitted by: marcel
Approved by: re (implicit)
2005-07-02 05:49:29 +00:00
ps
da61891eff Match _kvm_kvatop to it's prototype in kvm_i386.c. This unbreaks
the build.

Approved by:	re
2005-06-30 01:25:21 +00:00
peter
d939998368 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
2005-06-29 22:39:41 +00:00
peter
9729a26e81 Set ki_tdev to NODEV rather than NULL.
Approved by:  re
2005-06-24 00:37:04 +00:00
pjd
d4e1d8c063 Make kvm(3) aware of ki_jid field.
Reviewed by:	gad
MFC after:	3 days
2005-03-20 10:37:56 +00:00
phk
9979dac9ca Dike out unwarranted reference to si_udev. 2005-03-15 14:26:14 +00:00
ru
ed72feddcb Sort sections. 2005-01-20 09:17:07 +00:00
das
bab4eb89e3 In preparation to remove U areas, don't refer to p_uarea in libkvm.
Reviewed by:	arch@
2004-11-20 02:28:26 +00:00
csjp
da083b47d0 Remove un-needed call to close(2). The fd that close is being
called on is invalid and has no use.

Reviewed by:	smkelly
2004-11-13 14:30:34 +00:00
csjp
f7e2997810 Document the fact that kvm_getenvv(3) requires procfs to be mounted
on /proc in order to operate correctly.

Reviewed by:	simon@, wes@
2004-11-13 14:26:13 +00:00
peter
9213c0d6bf 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.
2004-10-11 21:56:27 +00:00
jhb
a217c8967b - 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)
2004-10-06 17:10:56 +00:00
marcel
b9f196b2c4 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.
2004-09-23 00:05:20 +00:00
marcel
f3532c8563 The offset argument to mmap(2) is not a pointer. Use 0 instead of NULL. 2004-09-22 20:26:33 +00:00
julian
5813d27029 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
2004-09-05 02:09:54 +00:00
imp
4f59933abf Expand the license referenced indirectly inline. 2004-07-31 18:49:53 +00:00
kan
9cd8c33985 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.
2004-07-28 05:43:08 +00:00
ru
01548ace15 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
ru
615a6a246a Markup, grammar, punctuation. 2004-07-01 18:20:57 +00:00
gad
e687b8e846 Fix a test of bit-flag "P_SA" by adding parenthesis around the expression.
Submitted by:	Cyrille Lefevre
2004-06-23 21:59:56 +00:00
gad
6259da3c1d Replace a call to strncpy() with a call to strlcpy()
Submitted by:	Cyrille Lefevre
2004-06-23 21:31:43 +00:00
gad
bc3947b883 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
2004-06-19 14:08:10 +00:00
phk
40dd98a3bd 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.
2004-06-17 17:16:53 +00:00
julian
79f004cd9f This library has to change whenever the kernel process structure changes. 2004-06-16 00:34:31 +00:00
stefanf
d7af95e868 Avoid assignments to cast expressions.
Reviewed by:	md5
Approved by:	das (mentor)
2004-06-08 13:08:19 +00:00
peter
506da60972 Implement crashdump decoding for AMD64 as well, now that I have finally
got a sample to test against.
2004-05-19 18:24:13 +00:00
cognet
ce08d0c81c Import libkvm MD file for arm. 2004-05-14 12:24:03 +00:00
schweikh
9ae4a75423 Fix a warning: compare u_long ps_strings to 0 instead of NULL. 2004-03-28 11:50:54 +00:00
ru
6320e86ac0 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.
2004-03-26 08:05:39 +00:00
ru
b8af1b3b30 Document that libkvm also uses /dev/kmem, to access KVM. 2004-03-26 08:03:53 +00:00
deischen
f0ee20dfcc Update man page to reflect additional flag to allow selection of threads. 2004-02-22 18:12:56 +00:00
deischen
6f8b1a92fb Teach kvm_getprocs() to recognize a sysctl flag for including threads. 2004-02-22 17:57:10 +00:00
simokawa
883f5b4450 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
2003-10-29 14:02:16 +00:00
bde
08298e8fb5 Fixed some style bugs in the removal of __P(()). Blind removal of
spaces before __P(()) outdented continuation lines to column 0.
2003-10-13 04:44:55 +00:00
tjr
1953894b85 Document KERN_PROC_PROC, update KERN_PROC_ALL description. 2003-09-27 08:22:23 +00:00
tjr
f428d37a30 Use the 3-component version of the KERN_PROC_PROC sysctl. 2003-09-27 08:14:37 +00:00
obrien
372364ee0f style.Makefile(5) 2003-08-18 15:25:39 +00:00
gordon
5901302929 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.
2003-08-17 08:28:46 +00:00
phk
fd30158300 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.
2003-07-31 21:44:31 +00:00
phk
065d723b50 Remove various unused variables, prototypes and local variables. 2003-07-31 21:42:12 +00:00
phk
f51993282f Disable and lobotomize the kvm image reading swapinfo code, the kernel
layout is about to change.

The sysctl based method still returns correct information.
2003-07-31 21:38:32 +00:00
phk
5a8eb87c5a Retire the SWIF_DUMP_TREE code, this is in the way for a rework of
the swap_pager layout.
2003-07-31 21:30:28 +00:00
phk
2ba1b34bc1 Unifdef -UDEBUG_SWAPINFO The kernel data structures are about to change. 2003-07-31 20:53:04 +00:00
davidxu
b493aad303 P_THREADED was renamed to P_SA, follow up. 2003-06-15 03:42:04 +00:00
marcel
5d3af2c5ab 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)
2003-05-16 21:26:42 +00:00
jhb
b47c6f25a7 s/procsig/sigacts/ to catch up to procsig and sigacts changes in the kernel.
Approved by:	re (scottl)
2003-05-14 15:01:20 +00:00
peter
2c96ea867b Bandaid for world. jhb gets the pointy hat here and he needs to look at
this.

Approved by:   re (scottl)
2003-05-14 07:28:43 +00:00