Commit Graph

24 Commits

Author SHA1 Message Date
Bruce Evans
e0c95ed947 Fixed the easy cases of const poisoning in the kernel. Cosmetic. 1996-08-31 16:52:44 +00:00
Poul-Henning Kamp
5e9ed9c990 Write protect the text segment of gzip'ed programs.
Various other cleanups by phk.

Reviewed by:	phk
Submitted by:	Igor Khasilev <igor@jabber.paco.odessa.ua>
1996-08-01 22:00:14 +00:00
Poul-Henning Kamp
f8845af0db First pass at cleaning up macros relating to pages, clusters and all that. 1996-05-02 10:43:17 +00:00
Bruce Evans
a794e791c8 Removed unnecessary #includes from <sys/imgact.h> so that it is
self-sufficient and added explicit #includes where required.
1996-05-01 02:43:13 +00:00
Bruce Evans
ede8dc43a2 Fixed unsigned longs that should have been vm_offset_t.
vm_offset_t is currently unsigned long but should probably be plain
unsigned for i386's to match the choice of minimal types to represent
for fixed-width types in Lite2.  Anyway, it shouldn't be assumed
to be unsigned long.

I only fixed the type mismatches that were detected when I changed
vm_offset_t to unsigned.  Only pointer type mismatches were detected.
1996-03-19 15:03:00 +00:00
Poul-Henning Kamp
c9c37b27d1 rewrap some long lines. 1996-02-13 14:16:36 +00:00
John Dyson
bd7e5f992e Eliminated many redundant vm_map_lookup operations for vm_mmap.
Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish
	overhead for merged cache.
Efficiency improvement for vfs_cluster.  It used to do alot of redundant
	calls to cluster_rbuild.
Correct the ordering for vrele of .text and release of credentials.
Use the selective tlb update for 486/586/P6.
Numerous fixes to the size of objects allocated for files.  Additionally,
	fixes in the various pagers.
Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs.
Fixes in the swap pager for exhausted resources.  The pageout code
	will not as readily thrash.
Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into
	page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE),
	thereby improving efficiency of several routines.
Eliminate even more unnecessary vm_page_protect operations.
Significantly speed up process forks.
Make vm_object_page_clean more efficient, thereby eliminating the pause
	that happens every 30seconds.
Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the
	case of filesystems mounted async.
Fix a panic with busy pages when write clustering is done for non-VMIO
	buffers.
1996-01-19 04:00:31 +00:00
David Greenman
efeaf95a41 Untangled the vm.h include file spaghetti. 1995-12-07 12:48:31 +00:00
Bruce Evans
7ee050b70c Staticized.
Added prototypes.
1995-12-02 16:32:03 +00:00
David Greenman
c52007c2cc All:
Changed vnodep -> vp for consistency with the rest of the kernel, and
changed iparams -> imgp for brevity.

kern_exec.c:
   Explicitly initialized some additional parts of the image_params struct
to avoid bzeroing it. Rewrote the set-id code to reduce the number of
logical tests. The rewrite exposed a mostly benign bug in the algorithm:
traced set-id images would get ktracing disabled even if the set-id didn't
happen for other reasons.
1995-11-06 12:52:37 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Bruce Evans
b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00
David Greenman
68940ac1a0 Use of vm_allocate() and vm_deallocate() has been deprecated. 1995-02-20 22:23:31 +00:00
Poul-Henning Kamp
1e3a24e880 Actually access the right first page if the file.
Bruce finally caught this bogon for me, Thank you Bruce !
Due to some part of the VM/buffer/pmap magic doing clustering, this bogon
managed to work better than 99.9% of the time.  Amazing.
If You ever again see a weird message from the gzip code, please tell me.
1995-02-13 07:40:33 +00:00
Poul-Henning Kamp
8963028c59 Make the diagnostics a little more useful.
A word of wisdom, don't do this:

|	cd /usr/bin
|	for i in *
|	do
|		cp $i /tmp/a
|		gzip -9 < /tmp/a > $i
|	done

It will compress files with multiple links several times.  do it this way:

|	cd /usr/bin
|	for i in *
|	do
|		gunzip -f < $i > /tmp/a
|		gzip -9 < /tmp/a > $i
|	done
1994-10-22 11:55:16 +00:00
Poul-Henning Kamp
6aafb7e048 I belive imgact_gzip is finally reentrant. It is also a whole lot more
readable.

inflate is now much more general, and is there if anybody feels like making
a uncompressing filesystem or something like that (hint hint !)
1994-10-22 11:40:38 +00:00
Geoff Rehmet
65bbec73d7 - remove unnecessary #includes (I think a couple of redundant ones remain)
- excise some unused code (#if 0'd out - don't want to nuke it yet)
- fix problems with "make depend" - some macros were screwing it up
- get rid of some static local variables

There still seems to be a small reentrancy problem somewhere.
1994-10-11 11:29:17 +00:00
Geoff Rehmet
ee38c19853 First stage of getting imgact_gzip reentrant:
1) cut this up into /sys/sys/inflate.h, sys/kern/inflate.c
sys/kern/ingact_gzip.c
2) make a lot more things static
3) make a lot of globals const
4) make some args const
5) first stage of making globals into a struct (not used yet)

The vm_allocate() call which was introduced between revisions 1.4 and
1.5 of imagact_gzip.c broke things.  I have backed that out for the time
being.  (Davidg: help please)

WARNING: if you have gzip enabled in your kernel, you must now run
config again, as another source file has been added.  Otherwise your
kernel compile will fall over.

This is all still WIP.  More commits to come.

Suggestions from: phk.
1994-10-07 22:27:00 +00:00
Poul-Henning Kamp
c3a82ca0a6 Steven Wallace provided a program which broke this stuff. I guess there are
more weird kinds of a.out than anyone can argue for.  This code failed to
load the first 28K of the text-segment, in the case where the first page
of the a.out contains only the a.out-header, and the text is still at 0x0.
Thanks Steven !
1994-10-06 18:22:24 +00:00
Poul-Henning Kamp
009bc0f68d David Greenman told me to do this: (Thanks!) use vm_allocate to allocate
the uncompression buffer.  Now malloc(M_GZIP) is used for all the Huffman-
tree stuff only.  Numbers so far indicate < 15Kb Malloc use + 32 Kb for
the abovementioned buffer while uncompressing.
1994-10-05 00:58:33 +00:00
Poul-Henning Kamp
0c99df0d8d Added M_GZIP for the imgact_gzip code. The gzip-code is likely to be used
for other weird things in the future (hint, hint!)
1994-10-04 06:51:42 +00:00
Poul-Henning Kamp
4efda9261d Based on the applause (in this case: not downright rejection :-) I have
cleaned up much of the cruft in this thing.

No printf's in the case where things go well.

Gzip-headers can contain filenames and comments (as long as they're
shorter than the page-size.)

I don't think we leak memory, in the "exec/aout" code.  I'm not quite sure
about the inflate code yet, but I don't think memory is lost.

Q:  Can I add a class M_GZIP to <sys/malloc.h> and bump M_LAST one up
without any thing else needing tweaking ?

Poul-Henning
1994-10-04 03:09:13 +00:00
Poul-Henning Kamp
4dd5a68318 First bug-fix. This this depends on something odd. I am looking at it,
but every now and then it will fail without an explanation :-(
1994-10-03 23:14:48 +00:00
Poul-Henning Kamp
37c32e9f3a ***
WARNING:  THIS MATERIAL MIGHT GO AWAY!
This material needs the core-groups approval to stay here for the 2.0 release.
If the core-group does not concent to this commit, it will be backed out.
***

It is a non-gpl'ed "unzip" which will allow execution of a.out files which
have been sent through "gzip -9".  The idea being saved disk-space.

Just now this code has quality rating:  "working prototype".

To compress a file to be used with this, do it exactly this way:

gzip -9 -v < /bin/FOO > /tmp/FOO
remember to chmod /tmp/FOO as needed.

DON'T compress all of you binaries right away !  There are several things
which you should consider first:

1. Using compressed binaries, you use >MUCH< more VM, and thus swap-space.

2. It is slow.

3. It might crash your machine.

Apart from that, I welcome comments...

NB:  There is also a change to sys/conf/files, but cvs core-dumped on me,
so it didn't get into the logs or emailed, but the commit seems to have
happended OK.
1994-10-03 05:23:01 +00:00