Commit Graph

63 Commits

Author SHA1 Message Date
Dag-Erling Smørgrav
0e79fe6f0e Constify (silence warnings introduced by last commit to sys/module.h) 2001-06-20 16:08:45 +00:00
Brian Somers
09dbb40410 Add linker_reference_module().
This function loads a module if required, otherwise bumps the reference
count -- the opposite of linker_file_unload().
2001-06-18 15:09:33 +00:00
Peter Wemm
f41325db5f With this commit, I hereby pronounce gensetdefs past its use-by date.
Replace the a.out emulation of 'struct linker_set' with something
a little more flexible.  <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set.  They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>).  Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated.  This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by:	eivind
2001-06-13 10:58:39 +00:00
Peter Wemm
81930014ef Make the TUNABLE_*() macros look and behave more consistantly like the
SYSCTL_*() macros.  TUNABLE_INT_DECL() was an odd name because it didn't
actually declare the int, which is what the name suggests it would do.
2001-06-06 22:17:08 +00:00
Boris Popov
a91f68bca6 o Actually extract version of interface and store it along with the name.
o Add new parameter to the modlist_lookup() function to perform lookups
  with strict version matching.

o Collapse duplicate code to function(s).
2001-03-22 08:58:45 +00:00
Boris Popov
303b15f193 Slightly reorganize code in the linker_load_dependancies() function to make
codepath more straightforward.
2001-03-22 07:55:33 +00:00
Boris Popov
804f27299d Remove support for old way of handling module dependencies.
Approved by:	peter
2001-03-22 07:14:42 +00:00
Poul-Henning Kamp
37d4006626 Another round of the <sys/queue.h> FOREACH transmogriffer.
Created with:   sed(1)
Reviewed by:    md5(1)
2001-02-04 16:08:18 +00:00
Poul-Henning Kamp
fc2ffbe604 Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)
2001-02-04 13:13:25 +00:00
Peter Wemm
4058c0f013 Pull out the module path from the loader. ie: if you boot from
/boot/kernel.foobar/* then that had better be in the path ahead of the
others.

Submitted by:  Daniel J. O'Connor <darius@dons.net.au>
PR: 23662
2000-12-28 08:14:58 +00:00
David Malone
7cc0979fd6 Convert more malloc+bzero to malloc+M_ZERO.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
2000-12-08 21:51:06 +00:00
Doug Rabson
c9b004775d Add a workaround for statically linked kernels. 2000-10-04 17:40:24 +00:00
David E. O'Brien
6b6821c771 The kernel is now known as `kernel.ko' and it and its matching modules
live in ``/boot/kernel/''.

Submitted by:	Hisashi Hiramoto <hiramoto@phys.chs.nihon-u.ac.jp>
2000-09-06 06:22:20 +00:00
Peter Wemm
2c7f8b4ebd Fix self referential dependencies. eg: uhub was packaged along with
usb, all in usb.ko.  uhub depends on usb.  The bug was that the preload
processing only adds a module to the list once it's internal dependencies
are resolved... Since it was not "seeing" the internal usb module it
believed that uhub had a missing dependency.
2000-08-02 21:08:53 +00:00
Boris Popov
2ff087318a Correct SYSINIT execution order in the case when KLD contains more
than one SYSINIT with the same 'subsystem' id and different 'order' id.

Reviewed by:	peter
2000-07-09 23:58:56 +00:00
Kirk McKusick
e6796b67d9 Move the truncation code out of vn_open and into the open system call
after the acquisition of any advisory locks. This fix corrects a case
in which a process tries to open a file with a non-blocking exclusive
lock. Even if it fails to get the lock it would still truncate the
file even though its open failed. With this change, the truncation
is done only after the lock is successfully acquired.

Obtained from:	 BSD/OS
2000-07-04 03:34:11 +00:00
Archie Cobbs
6c66bbed1a Move the securelevel check before loading KLD's into linker_load_file(),
instead of requiring every caller of linker_load_file() to perform the
check itself. This avoids netgraph loading KLD's when securelevel > 0,
not to mention any future code that may call linker_load_file().

Reviewed by:	dfr
2000-06-29 17:57:04 +00:00
Jake Burkholder
e39756439c Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by:		msmith and others
2000-05-26 02:09:24 +00:00
Jake Burkholder
740a1973a6 Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by:	phk
Reviewed by:	phk
Approved by:	mdodd
2000-05-23 20:41:01 +00:00
Poul-Henning Kamp
2c9b67a8df Remove unneeded #include <vm/vm_zone.h>
Generated by:	src/tools/tools/kerninclude
2000-04-30 18:52:11 +00:00
Peter Wemm
54823af256 First round implementation of a fine grain enhanced module to module
version dependency system.  This isn't quite finished, but it is at a
useful stage to do a functional checkpoint.

Highlights:
- version and dependency metadata is gathered via linker sets, so things
are handled the same for static kernels and code built to live in a kld.
- The dependencies are at module level (versus at file level).
- Dependencies determine kld symbol search order - this means that you
cannot link against symbols in another file unless you depend on it. This
is so that you cannot accidently unload the target out from underneath
the ones referencing it.
- It is flexible enough that we can put tags in #include files and macros
so that we can get decent hooks for enforcing recompiles on incompatable
ABI changes.  eg: if we change struct proc, we could force a recompile
for all kld's that reference the proc struct.
- Tangled dependency references at boot time are sorted.  Files are
relocated once all their dependencies are already relocated.

Caveats:
- Loader support is incomplete, but has been worked on seperately.
- Actual enforcement of the version number tags is not active yet - just
the module dependencies are live.  The actual structure of versioning
hasn't been agreed on yet. (eg: major.minor, or whatever)
- There is some backwards compatability for old modules without metadata
but I'm not sure how good it is.

This is based on work originally done by Boris Popov (bp@freebsd.org),
but I'm not sure he'd recognize much of it now. Don't blame him. :-)
Also, ideas have been borrowed from Mike Smith.
2000-04-29 13:19:31 +00:00
Doug Rabson
326e27d81f * Rewrite to use kobj(9) instead of hard-coded function tables.
* Report link errors to stdout with uprintf() so that the user can see
  what went wrong (PR kern/9214).
* Add support code to allow module symbols to be loaded into GDB using
  the debugger's "sharedlibrary" command.
2000-04-24 17:08:04 +00:00
Eivind Eklund
762e6b856c Introduce NDFREE (and remove VOP_ABORTOP) 1999-12-15 23:02:35 +00:00
Peter Wemm
4537138981 Zap c_index() and c_rindex(). Bruce prefers these to implicitly convert
a const into a non-const as they do in libc.  I feel that defeating the
type checking like that quite evil, but that's the way it is.
1999-12-10 17:38:41 +00:00
Peter Wemm
95dc37f68d Tempt fate and stop index from converting a const char * into a char *.
I've made a seperate version (c_index() etc) that use const/const, but
I'm not sure it's worth it considering there is one file in the tree
that uses index on const strings (kern_linker.c) and it's easily adjusted
to scan the strings directly (and is perhaps more efficient that way).
1999-11-21 04:26:48 +00:00
Peter Wemm
d1f088dab5 Trim unused options (or #ifdef for undoc options).
Submitted by:	phk
1999-10-11 15:19:12 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Bruce Evans
0921e4886f Cast pointers to uintptr_t instead of casting them to u_long. They
are still converted to u_long by assignment of the uintptr_t, and
address calculations are still done using u_long.  This is OK for
currently supported machines, but addresses should be represented
by vm_offset_t or uintptr_t in case pointers are longer than longs.

"Fixed" size of linker_path[].  MAXPATHLEN + 1 was 1 too large for
search paths with only one file path in them, but much too small
for search paths with several long file paths in them.
1999-08-24 00:38:52 +00:00
Greg Lehey
4033a962bf Change the name of the static variable 'files' to 'linker_files' in
order to be able to refer to it uniquely from the kernel debugger.

Approved-by:	 peter
1999-08-20 00:18:07 +00:00
Peter Wemm
9c8b8baa38 Slight reorganization of kernel thread/process creation. Instead of using
SYSINIT_KT() etc (which is a static, compile-time procedure), use a
NetBSD-style kthread_create() interface.  kproc_start is still available
as a SYSINIT() hook.  This allowed simplification of chunks of the
sysinit code in the process.  This kthread_create() is our old kproc_start
internals, with the SYSINIT_KT fork hooks grafted in and tweaked to work
the same as the NetBSD one.

One thing I'd like to do shortly is get rid of nfsiod as a user initiated
process.  It makes sense for the nfs client code to create them on the
fly as needed up to a user settable limit.  This means that nfsiod
doesn't need to be in /sbin and is always "available".  This is a fair bit
easier to do outside of the SYSINIT_KT() framework.
1999-07-01 13:21:46 +00:00
Peter Wemm
df8abd0bb9 Slight tweak to fork1() calling conventions. Add a third argument so
the caller can easily find the child proc struct.  fork(), rfork() etc
syscalls set p->p_retval[] themselves.  Simplify the SYSINIT_KT() code
and other kernel thread creators to not need to use pfind() to find the
child based on the pid.  While here, partly tidy up some of the fork1()
code for RF_SIGSHARE etc.
1999-06-30 15:33:41 +00:00
Peter Wemm
b5b15c3ff0 First stages of a module dependency cleanup. This part fixes a
particularly annoying hack, namely having the linker bash the moduledata
to set the container pointer, preventing it being const.  In the process,
a stack of warnings were fixed and will probably allow a revisit of the
const C_SYSINIT() changes.  This explicitly registers modules in files or
preload areas with the module system first, and let them initialize via
SYSINIT/DECLARE_MODULE later in their SI_ORDER_xxx order.  The kludge of
finding the containing file is no longer needed since the registration
of modules onto the modules list is done in the context of initializing
the linker file.
1999-05-08 13:01:59 +00:00
Luoqi Chen
5206bca10a Enable vmspace sharing on SMP. Major changes are,
- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>
1999-04-28 01:04:33 +00:00
Poul-Henning Kamp
f711d546d2 Suser() simplification:
1:
  s/suser/suser_xxx/

2:
  Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
  s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.
1999-04-27 11:18:52 +00:00
Peter Wemm
88b4f4ee55 LK_RETRY is a vn_lock() flag, not one for lockmgr(). 1999-04-06 03:02:11 +00:00
Doug Rabson
a199ed3cc3 * Register sysctl nodes before running sysinits when loading files and
unregister them after sysuninits when unloading.
* Add code to vfs_register() to set the oid number of vfs sysctls to
  the type number of the filesystem.

Reviewed by: bde
1999-03-07 16:06:41 +00:00
Doug Rabson
75e08a5e7e A correction to the code which attempts to prevent the same module
being loaded twice.  It used rindex() to strip the pathname but failed
to account for the fact that rindex() will return a pointer to the '/',
not the first character of the filename.

Submitted by: Nick Hibma <hibma@skylink.it>
1999-02-20 21:22:00 +00:00
Doug Rabson
ce02431ffa * Change sysctl from using linker_set to construct its tree using SLISTs.
This makes it possible to change the sysctl tree at runtime.

* Change KLD to find and register any sysctl nodes contained in the loaded
  file and to unregister them when the file is unloaded.

Reviewed by: Archie Cobbs <archie@whistle.com>,
	Peter Wemm <peter@netplex.com.au> (well they looked at it anyway)
1999-02-16 10:49:55 +00:00
Matthew Dillon
fe08c21a53 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile.

    This commit includes significant work to proper handle const arguments
    for the DDB symbol routines.
1999-01-27 23:45:44 +00:00
Matthew Dillon
d254af07a1 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile
1999-01-27 21:50:00 +00:00
Doug Rabson
149a155c3b Don't try to call SYSUNINIT functions if there was a link error.
Reviewed by: Peter Wemm <peter@netplex.com.au>
1999-01-25 08:42:24 +00:00
Peter Wemm
461b36ab54 Update userref handling after discussion with submitter of previous
patch.  lf can't be dereferenced after the unload attempt, in case it
was freed.  Instead, decrement first and back it out if the unload failed.
This should be relatively immune to races caused by the user since the
userref count will be zero for the duration of the actual unloading and
will stop further kldunload attempts.

Submitted by:   Ustimenko Semen <semen@iclub.nsu.ru>
1999-01-23 03:45:22 +00:00
Peter Wemm
d7dfdda203 Relax linkage symbol scope restrictions to be more compatable with that
of shared libraries.
1999-01-19 22:26:46 +00:00
Peter Wemm
e75a9dc0b6 Don't decrement userrefs unless the file was actually was unloaded.
Submitted by:	Ustimenko Semen <semen@iclub.nsu.ru>
1999-01-19 16:26:32 +00:00
Peter Wemm
e99f57c354 Try and clean up the multiple formal loading support a bit, based on
suggestions from Greg Lehey some time ago.  In the face of multiple
potential file formats, try and give a more sensible error than just
ENOEXEC.

XXX a good case can be made that the loading process is wrong - the linker
should locate the file first (using the search paths etc), then run the
loaders to see if they recognize it.  While the present system allows for
the possibility of different search paths for different formats, we do not
use it and it just makes things more complicated than they need to be.
1999-01-17 17:58:52 +00:00
Mike Smith
f1b265228c Don't allow more than one module with the same name to be loaded.
Make kldfind ignore the path when searching for a loaded module.

Submitted by:	John Birrell (jb@freebsd.org)
1999-01-05 20:24:28 +00:00
Peter Wemm
ba031106b1 kldsym(2) prototype implementation 1998-11-11 13:04:40 +00:00
Peter Wemm
edfbe15080 Arrange for unload-time linker set hooks to be called. While cut/pasting
some code, I changed the original to be consistant with the rest of the
file rather than duplicating the problems.
1998-11-10 08:49:28 +00:00
Peter Wemm
21ce23eb91 Define the kld_debug variable if KLD_DEBUG is enabled 1998-11-06 15:10:17 +00:00
Peter Wemm
84e40f5627 The handle for the kernel is common. With this fix, ELF kernels can load
a.out kld modules, and a.out kernels can load ELF kld modules.
1998-11-04 15:20:58 +00:00