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120 Commits

Author SHA1 Message Date
mrg
6b11eea5b2 reject attempts to map an immutable or append-only file, shared with 
write protection.  this stops data corruption where it was possible
to change the in-memory copy of an append-only file (but not the on-disk
copy).  this is documented in NetBSD security advisory 1998-003.  thanks
to darrenr, lukem, cgd, mycroft and mrg for this.
 1998-05-10 12:35:58 +00:00
kleink
6fa43ba824 Minor KNF. 1998-05-09 15:05:50 +00:00
kleink
afeaa5bb57 Use size_t to pass the length of the memory region to operate on to chgkprot(), 
kernacc(), useracc(), vslock() and vsunlock(); (unsigned) ints are not
adequate on all platforms.
 1998-05-09 15:04:39 +00:00
kleink
d9066c40e9 Make uvm_vsunlock() actually use the proc * passed to it; per discussion 
with Jason Thorpe.
 1998-05-08 17:41:41 +00:00
kleink
182e12f413 Remove inclusions of syscall (and syscall argument) related header files; 
we don't need them here.
 1998-05-05 20:51:04 +00:00
mrg
dae55b7b7b fix a problem with swapping to files where a new variable introduced was not 
later incremented correctedly, causing the wrong data to be paged out, which
then caused general lossage later when the data was paged in and the process
tried to use it.  found by pk.
 1998-05-01 01:40:02 +00:00
thorpej
73863dd3c9 Pass vslock() and vsunlock() a proc *, rather than implicitly operating 
on curproc.
 1998-04-30 06:28:57 +00:00
matthias
fceafcf990 port-pc532 now has pmap_new just like port-i386. 1998-04-25 19:58:58 +00:00
thorpej
339c715a9e Fix small whitespace botch. 1998-04-16 03:54:35 +00:00
thorpej
fe97b1da8e Oops, fix a typo. 1998-04-09 00:24:05 +00:00
thorpej
2018d40811 Allocate kernel virtual address space for the U-area before allocating 
the new proc structure when performing a fork.  This makes it much
easier to abort a fork operation and return an error if we run out
of KVA space.

The U-area pages are still wired down in {,u}vm_fork(), as before.
 1998-04-09 00:23:38 +00:00
tv
39b4c2fece mmap() default MAP_SHARED/MAP_PRIVATE is `DEBUG'', not `DIAGNOSTIC'' 1998-04-01 21:43:52 +00:00
chuck
9eb2927bec free correct page in incomplete section of MNN, as pointed 
out by Soren S. Jorvang.
 1998-03-31 03:04:59 +00:00
chuck
fe4846acdc have ddb show map print resident page count 1998-03-30 17:34:58 +00:00
mycroft
0652b9af01 Mark scheduler() and uvm_scheduler() as never returning. 1998-03-30 06:24:42 +00:00
kleink
6618749e5a Per XPG, if the file descriptor argument to mmap() refers to a file whose 
type is not supported (neither VREG nor VCHR, or not a vnode at all), fail
with ENODEV instead of EINVAL.
 1998-03-28 16:58:04 +00:00
thorpej
b65c510879 Split uvmspace_alloc() into uvmspace_alloc() and uvmspace_init(). The latter 
can be used for initializing a pre-allocated vmspace.
 1998-03-27 01:47:06 +00:00
chuck
db81cc9c76 update per-process rusage fault counters (ru_majflt/ru_minflt) under UVM 1998-03-26 21:50:14 +00:00
chuck
e6da5a01e4 remove tmpwire arg from uvm_pagewire() -- it isn't needed anymore. 
noted by chuck s.
 1998-03-22 21:29:30 +00:00
chuck
617118bccc fix released pg bugs detected by Chuck S.: 
- release the correct page (ppsp[lcv], not pg)
 - don't access the page's fields after we have released it
 - in the uvm_objct case: move on to the next page if we've released
[should have been merged in on 1998/02/12, but we somehow missed it]
 1998-03-22 16:10:29 +00:00
chuck
dd370f11a3 rework the copy inheritance case of fork. the old way did not handle 
the very rare case of shared mappings that have amap's attached in a
reasonable way -- this is not currently causing any problems, but i
fixed it anyway.  update the comment in this section of code and also
be smarter about avoiding needless calls to pmap_protect().
 1998-03-19 19:26:50 +00:00
thorpej
dbc7bbee68 Make the previous change `atomic'. 1998-03-19 06:37:26 +00:00
thorpej
daade671ae When unsharing or execing, deactivate the old vmspace before reassigning 
and activating the new one.  Pointed out by Chris Demetriou.
 1998-03-19 04:19:21 +00:00
mrg
be92b169f8 oops, missed a bit of KNF here. 1998-03-17 07:50:08 +00:00
chuck
927ec8b012 bug fix: when doing uvm_vnp_sync() actually skip over blocked uvn's so 
that we don't try and sync them later.   should get rid of the
"uvm_vnp_sync: dying vnode on sync list" related warnings that were
occuring during a "make install."
 1998-03-11 01:37:40 +00:00
chuck
21624aaf72 uvm_dump now dumps some important pointers for debugging 1998-03-10 14:36:55 +00:00
mrg
8106d13596 KNF. 1998-03-09 00:58:55 +00:00
mycroft
24e6e6a0e7 Convert MAP_PRIVATE device mappings to MAP_SHARED on *all* platforms, not just 
the SPARC.
Remove the #ifdef COMPAT_13 for automatically adding a sharing type, since the
interface is *supposed* to support this.
Also modify the DIAGNOSTIC messages here a bit.
 1998-03-03 14:34:10 +00:00
fvdl
e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
chuck
cbd05b1537 be consistent about offsets in kernel objects. vm_map_min(kernel_map) 
should always be the base [fixes problem on m68k detected by jason thorpe]

add comments to uvm_km.c explaining kernel memory management in more detail
 1998-02-24 15:58:09 +00:00
thorpej
1e3e1bfe09 Include the NFS option header. 1998-02-19 00:55:04 +00:00
drochner
93a065690b fix map range boundary check 1998-02-18 14:50:32 +00:00
mrg
3ed2e6ac6c bug fix from chuck: uvm_vnp_terminate panic when /sbin/init was unlinked 1998-02-18 06:35:46 +00:00
thorpej
550678e57f Oops, fix a typo. 1998-02-13 05:34:30 +00:00
thorpej
e6c31d3db7 KNF. 1998-02-13 05:33:55 +00:00
thorpej
872181c2f2 A few changes to make it possible to read UVM histories from userland: 
- Protect option headers from inclusion if ! _KERNEL or if _LKM.
- Make sure struct uvm_history is always the same size (not dependent
  on NCPU).
- Add fmtlen and fnlen members to struct uvm_history_ent, which specify
  the lengths fo the fmt and fn strings.
- Add name, namelen, and a list entry to struct uvm_history.
- When a history is initialized, place it on the global list of all histories.
 1998-02-13 04:55:14 +00:00
thorpej
cb5f8ef1df Add a global list of all UVM histories. 1998-02-13 04:52:00 +00:00
thorpej
90aee42d35 Provide a patchable knob (uvmhist_print_enabled) so that UVM history 
buffer printing can be switched on and off at run-time.  Only exists
if the kernel is build with UVMHIST_PRINT, and defaults to `on'.
 1998-02-12 20:10:15 +00:00
chs
7f45dbdfae add copyright. 1998-02-12 07:36:43 +00:00
mrg
d90485202c - add defopt's for UVM, UVMHIST and PMAP_NEW. 
- remove unnecessary UVMHIST_DECL's.
 1998-02-10 14:08:44 +00:00
perry
021fdb646a add/cleanup multiple inclusion protection. 1998-02-10 02:34:17 +00:00
mrg
e92c7d991e KNF. 1998-02-09 14:35:48 +00:00
mrg
7d3aef40b3 keep statistics on pageout/pagein, total pages, and total operations. 1998-02-09 13:08:22 +00:00
mrg
3112d4b3e1 KNF. 1998-02-09 04:05:36 +00:00
mrg
7ff12d37cc fill out vmtotals: t_free, t_vm, t_avm, t_rm and t_arm. leaves shared of same, and t_pw. 1998-02-08 22:23:33 +00:00
thorpej
39f8b8c99b Round allocations to page size in uvm_pageboot_alloc(). 1998-02-08 18:27:30 +00:00
mrg
6122fae970 KNF 1998-02-08 16:07:57 +00:00
mrg
bc3395e590 turn of UVM history logging by default. 1998-02-08 14:19:21 +00:00
mrg
d9b2f81e27 move pdhist initialisation to the same place as maphist. also, declare 
the history buffers are "struct uvm_history_ent" to ensure proper
alignment (eg, alpha).  this fixes a boottime panic when the pdhist was
used before it had been initialised.
 1998-02-08 07:52:28 +00:00
thorpej
1305ecbe62 Allow callers of uvm_km_suballoc() to specify where the base of the 
submap _must_ begin, by adding a "fixed" boolean argument.
 1998-02-08 06:15:53 +00:00
mrg
0a058cb62f implement counters for pages paged in/out 1998-02-07 17:00:36 +00:00
mrg
4ef57d4d22 KNF. 1998-02-07 12:45:53 +00:00
mrg
5e55ce6648 bzero the entire vmspace, like the old vm does. makes ps report sane values of VSZ for swapper/pagedaemon 1998-02-07 12:31:32 +00:00
mrg
1f6b921cf7 restore rcsids 1998-02-07 11:07:38 +00:00
chs
9b371040ea keep track of how many pages are currently being paged out, 
stop initiating new pageouts when "(free + paging) > freetarg".
fix pageq locking.
 1998-02-07 02:35:11 +00:00
chs
c2f8ffc062 reserve some pages for the kernel, and some more especially 
for the pagedaemon allocating from kmem_object.  this should
prevent from the pagedaemon running out of memory and deadlocking.
fix counting of wired pages.
add some debugging code to detect attempts to reference free vm_pages.
 1998-02-07 02:34:08 +00:00
chs
249efd73a1 enable hashtables for swapslot storage - deadlock is fixed. 
fix initialization of swhash entries.
use malloc(M_NOWAIT) for creating kernel object.
avoid dereferencing a vm_page once the page has been freed.
 1998-02-07 02:32:37 +00:00
chs
39c12db74f declare aobj_pager, needed in uvm_km.c. 1998-02-07 02:31:06 +00:00
chs
c82ac447df convert kernel_object to an aobj. 
in uvm_km_pgremove(), free swapslots if the object is an aobj.
in uvm_km_kmemalloc(), mark pages as wired and count them.
 1998-02-07 02:29:21 +00:00
chs
6376c02019 enable paging of kernel_object. 1998-02-07 02:26:46 +00:00
chs
732a925b1b add locking of kernel_map in uvm_kernacc(). 
check return value of uvm_fault_wire() in uvm_fork().
enable swappings.
 1998-02-07 02:26:04 +00:00
chs
29ec5fd8d5 prototype for uvm_map_checkprot() moved here. 
add uvmexp fields for pagouts-in-progress and kernel-reserved pages.
 1998-02-07 02:24:02 +00:00
chs
273ac223ec prototype for uvm_map_checkprot() moved to uvm_extern.h. 1998-02-07 02:22:24 +00:00
chs
21e2cac359 fix typoes in locking. 
use M_UVMAMAP instead of M_TEMP for malloc type.
 1998-02-07 02:21:29 +00:00
chs
5a7c4f2caa don't try to relock amap if there isn't one. 1998-02-07 02:19:55 +00:00
chs
7cb9f7e5b1 rearrange a bit for clarity. 1998-02-07 02:18:27 +00:00
chs
098b8c2420 fix typoes in locking. 1998-02-07 02:17:48 +00:00
chs
1f583a43b1 remove locking from UVMCNT counters. 
they don't need to be exact, and the locking causes problems
in some of places they're used.
 1998-02-07 02:16:52 +00:00
thorpej
9eb328b495 RCS ID police. 1998-02-06 22:26:13 +00:00
mrg
f2caacc717 initial import of the new virtual memory system, UVM, into -current. 
UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some
minor portions derived from the old Mach code.  i provided some help
getting swap and paging working, and other bug fixes/ideas.  chuck
silvers <chuq@chuq.com> also provided some other fixes.

this is the UVM kernel code portion.


this will be KNF'd shortly.  :-)
 1998-02-05 06:25:08 +00:00