d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
093c05e39d
freebsd-skq/sys/kern/init_main.c

719 lines
19 KiB
C
Raw Normal View History

BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
* Copyright (c) 1995 Terrence R. Lambert
* All rights reserved.
*
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)init_main.c 8.9 (Berkeley) 1/21/94
*/
Use __FBSDID().
2003-06-11 00:56:59 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
Allow the init_path to be customised in an embedded system using the INIT_PATH config option. Also fix two bugs which caused an infinite loop in none of the programs in the init_path were found. That code was obviously not tested!
1999-05-05 12:20:23 +00:00
#include "opt_init_path.h"
Introduce support for Mandatory Access Control and extensible kernel access control. Invoke the necessary MAC entry points to maintain labels on process credentials. In particular, invoke entry points for the initialization and destruction of struct ucred, the copying of struct ucred, and permit the initial labels to be set for both process 0 (parent of all kernel processes) and process 1 (parent of all user processes). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-07-31 00:39:19 +00:00
#include "opt_mac.h"
Add more options into the conf/options and i386/conf/options.i386 files and the #include hooks so that 'make depend' is more useful. This covers most of the options I regularly use (but not all) and some other easy ones.
1996-03-02 18:24:13 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/param.h>
Include sys/_lock.h and sys/_mutex.h to reduce namespace pollution. Requested by: jhb
2002-01-13 21:37:49 +00:00
#include <sys/kernel.h>
Added fields for VM_MIN_ADDRESS, PS_STRINGS and stack protections to sysentvec. Initialized all fields of all sysentvecs, which will allow them to be used instead of constants in more places. Provided stack fixup routines for emulations that previously used the default.
2002-09-01 21:41:24 +00:00
#include <sys/exec.h>
Set the soft openfiles limit to maxfiles instead of to NOFILE. The limit is now only used by init, so it may as well be "infinite". Don't use RLIM_INFINITY, since setrlimit() doesn't allow setting that value. Use maxfiles instead of RLIM_INFINITY for the hard limit for the same reason. Similarly for the maxprocesses limits (use the "infinite" value of maxproc instead if MAXUPRC and RLIM_INFINITY). NOFILES, MAXUPRC, CHILD_MAX and OPEN_MAX are no longer used in /usr/src and should go away. Their values are almost guaranteed to be wrong now that login.conf exists, so anything that uses the values is broken. Unfortunately, there are probably a lot of ports that depend on them being defined. The global limits maxfilesperproc and maxprocperuid should go away too.
1997-01-27 12:43:36 +00:00
#include <sys/file.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/filedesc.h>
Major update to the way synchronization is done in the kernel. Highlights include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
2000-09-07 01:33:02 +00:00
#include <sys/ktr.h>
Convert the allproc and proctree locks from lockmgr locks to sx locks.
2001-03-28 11:52:56 +00:00
#include <sys/lock.h>
Introduce support for Mandatory Access Control and extensible kernel access control. Invoke the necessary MAC entry points to maintain labels on process credentials. In particular, invoke entry points for the initialization and destruction of struct ucred, the copying of struct ucred, and permit the initial labels to be set for both process 0 (parent of all kernel processes) and process 1 (parent of all user processes). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-07-31 00:39:19 +00:00
#include <sys/mac.h>
Reduced #include spam in <sys/sysproto.h> and fixed things that depended on it. makesyscalls.sh: This parsed $Id$. Fixed(?) to parse $FreeBSD$. The output is wrong when the id is not expanded in the source file. syscalls.master: Fixed declaration of sigsuspend(). There are still some bogons and spam involving sigset_t. Use `struct foo *' instead of the equivalent `foo_t *' for some nfs and lfs syscalls so that <sys/sysproto.h> doesn't depend on <sys/mount.h>.
1997-01-16 15:58:32 +00:00
#include <sys/mount.h>
Catch up to moving headers: - machine/ipl.h -> sys/ipl.h - machine/mutex.h -> sys/mutex.h
2000-10-20 07:58:15 +00:00
#include <sys/mutex.h>
Split out a number of mostly VFS and signal related syscalls into a kernel-internal kern_*() version and a wrapper that is called via the syscall vector table. For paths and structure pointers, the internal version either takes a uio_seg parameter or requires the caller to copyin() the data to kernel memory as appropiate. This will permit emulation layers to use these syscalls without having to copy out translated arguments to the stack gap. Discussed on: -arch Review/suggestions: bde, jhb, peter, marcel
2002-09-01 20:37:28 +00:00
#include <sys/syscallsubr.h>
A major sweep over the sysctl stuff. Move a lot of variables home to their own code (In good time before xmas :-) Introduce the string descrition of format. Add a couple more functions to poke into these marvels, while I try to decide what the correct interface should look like. Next is adding vars on the fly, and sysctl looking at them too. Removed a tine bit of defunct and #ifdefed notused code in swapgeneric.
1995-12-04 16:48:58 +00:00
#include <sys/sysctl.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/systm.h>
Move the include of <sys/systm.h> so that KTR gets a declaration for snprintf().
2000-09-10 13:54:52 +00:00
#include <sys/signalvar.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/vnode.h>
Changes preparing for iBCS support Reviewed by: Submitted by:
1994-08-24 11:52:21 +00:00
#include <sys/sysent.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/reboot.h>
- Implement a mechanism for allowing schedulers to place scheduler dependant data in the scheduler independant structures (proc, ksegrp, kse, thread). - Implement unused stubs for this mechanism in sched_4bsd. Approved by: re Reviewed by: luigi, trb Tested on: x86, alpha
2002-11-21 01:22:38 +00:00
#include <sys/sched.h>
Convert the allproc and proctree locks from lockmgr locks to sx locks.
2001-03-28 11:52:56 +00:00
#include <sys/sx.h>
Remove prototype definitions from <sys/systm.h>. Prototypes are located in <sys/sysproto.h>. Add appropriate #include <sys/sysproto.h> to files that needed protos from systm.h. Add structure definitions to appropriate files that relied on sys/systm.h, right before system call definition, as in the rest of the kernel source. In kern_prot.c, instead of using the dummy structure "args", create individual dummy structures named <syscall>_args. This makes life easier for prototype generation.
1995-10-08 00:06:22 +00:00
#include <sys/sysproto.h>
Untangled the vm.h include file spaghetti.
1995-12-07 12:48:31 +00:00
#include <sys/vmmeter.h>
We have had support for running the kernel daemons as threads for quite a while, but forgot to do so. For now, this code supports most daemons running as kernel threads in UP kernels, and as full processes in SMP. We will soon be able to run them as threads in SMP, but not yet.
1997-12-12 04:00:59 +00:00
#include <sys/unistd.h>
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
#include <sys/malloc.h>
Avoid the modules madness I inadvertently introduced by making the cloning infrastructure standard in kern_conf. Modules are now the same with or without devfs support. If you need to detect if devfs is present, in modules or elsewhere, check the integer variable "devfs_present". This happily removes an ugly hack from kern/vfs_conf.c. This forces a rename of the eventhandler and the standard clone helper function. Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include like <sys/queue.h> Remove all #includes of opt_devfs.h they no longer matter.
2000-09-02 19:17:34 +00:00
#include <sys/conf.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <machine/cpu.h>
#include <vm/vm.h>
Untangled the vm.h include file spaghetti.
1995-12-07 12:48:31 +00:00
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <sys/user.h>
Include copyright message from <sys/copyright.h>
1997-03-01 17:49:09 +00:00
#include <sys/copyright.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
void mi_startup(void); /* Should be elsewhere */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Components of the first process -- never freed. */
Last commit this round: Staticize. we are now down to about 1146 symbols being global, of which I estimate that about 100 are validly so.
1995-12-10 13:45:30 +00:00
static struct session session0;
static struct pgrp pgrp0;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct proc proc0;
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
struct thread thread0;
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.
2002-09-15 23:52:25 +00:00
struct kse kse0;
struct ksegrp ksegrp0;
Last commit this round: Staticize. we are now down to about 1146 symbols being global, of which I estimate that about 100 are validly so.
1995-12-10 13:45:30 +00:00
static struct filedesc0 filedesc0;
static struct plimit limit0;
Made vmspace0 non-static. Its useful to be able to identify a vmspace as the kernel vmspace.
2003-04-13 21:29:11 +00:00
struct vmspace vmspace0;
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
struct proc *initproc;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
NFS diskless operation was broken because swapdev_vp wasn't initialized. These changes solve the problem in a general way by moving the initialization out of the individual fs_mountroot's and into swaponvp(). Submitted by: Poul-Henning Kamp
1995-05-19 03:27:08 +00:00
struct vnode *rootvp;
Fixed multiple definitions of boothowto. Fixed bitrot in the read-only access to kern.boottime.
1997-11-24 18:35:04 +00:00
int boothowto = 0; /* initialized so that it can be patched */
Add new oid, debug.boothowto. This allows userland apps to see how the kernel was booted and perhaps do conditional things based upon it (sysinstall, for example, will now turn Debug mode on automatically if boot -v was done). Submitted by: msmith Suggested by: ulf
2000-02-25 11:43:08 +00:00
SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
- Move the setting of bootverbose to a MI SI_SUB_TUNABLES SYSINIT. - Attach a writable sysctl to bootverbose (debug.bootverbose) so it can be toggled after boot. - Move the printf of the version string to a SI_SUB_COPYRIGHT SYSINIT just afer the display of the copyright message instead of doing it by hand in three MD places.
2001-05-17 22:28:46 +00:00
int bootverbose;
SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, "");
A major sweep over the sysctl stuff. Move a lot of variables home to their own code (In good time before xmas :-) Introduce the string descrition of format. Add a couple more functions to poke into these marvels, while I try to decide what the correct interface should look like. Next is adding vars on the fly, and sysctl looking at them too. Removed a tine bit of defunct and #ifdefed notused code in swapgeneric.
1995-12-04 16:48:58 +00:00
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
/*
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
* This ensures that there is at least one entry so that the sysinit_set
* symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
* executed.
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
*/
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
1) Changed ddb into a option rather than a pseudo-device (use options DDB in your kernel config now). 2) Added ps ddb function from 1.1.5. Cleaned it up a bit and moved into its own file. 3) Added \r handing in db_printf. 4) Added missing memory usage stats to statclock(). 5) Added dummy function to pseudo_set so it will be emitted if there are no other pseudo declarations.
1994-08-27 16:14:39 +00:00
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
/*
* The sysinit table itself. Items are checked off as the are run.
* If we want to register new sysinit types, add them to newsysinit.
*/
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
SET_DECLARE(sysinit_set, struct sysinit);
struct sysinit **sysinit, **sysinit_end;
struct sysinit **newsysinit, **newsysinit_end;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
/*
* Merge a new sysinit set into the current set, reallocating it if
* necessary. This can only be called after malloc is running.
*/
void
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
sysinit_add(struct sysinit **set, struct sysinit **set_end)
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
{
struct sysinit **newset;
struct sysinit **sipp;
struct sysinit **xipp;
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
int count;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
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
count = set_end - set;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
if (newsysinit)
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
count += newsysinit_end - newsysinit;
Fix sysinit_add(). - Don't include multiple copies of the previous sysinit in the new one. - Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
else
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
count += sysinit_end - sysinit;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
if (newset == NULL)
panic("cannot malloc for sysinit");
xipp = newset;
Fix sysinit_add(). - Don't include multiple copies of the previous sysinit in the new one. - Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
if (newsysinit)
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
for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
*xipp++ = *sipp;
Fix sysinit_add(). - Don't include multiple copies of the previous sysinit in the new one. - Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
else
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
for (sipp = sysinit; sipp < sysinit_end; sipp++)
Fix sysinit_add(). - Don't include multiple copies of the previous sysinit in the new one. - Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
*xipp++ = *sipp;
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
for (sipp = set; sipp < set_end; sipp++)
Fix sysinit_add(). - Don't include multiple copies of the previous sysinit in the new one. - Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
*xipp++ = *sipp;
if (newsysinit)
free(newsysinit, M_TEMP);
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
newsysinit = newset;
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
newsysinit_end = newset + count;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
}
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* System startup; initialize the world, create process 0, mount root
* filesystem, and fork to create init and pagedaemon. Most of the
* hard work is done in the lower-level initialization routines including
* startup(), which does memory initialization and autoconfiguration.
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
*
* This allows simple addition of new kernel subsystems that require
* boot time initialization. It also allows substitution of subsystem
* (for instance, a scheduler, kernel profiler, or VM system) by object
Retire LFS. If you want to play with it, you can find the final version of the code in the repository the tag LFS_RETIREMENT. If somebody makes LFS work again, adding it back is certainly desireable, but as it is now nobody seems to care much about it, and it has suffered considerable bitrot since its somewhat haphazard integration. R.I.P
1998-01-30 11:34:06 +00:00
* module. Finally, it allows for optional "kernel threads".
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
void
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
mi_startup(void)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
register struct sysinit **sipp; /* system initialization*/
register struct sysinit **xipp; /* interior loop of sort*/
register struct sysinit *save; /* bubble*/
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
if (sysinit == NULL) {
sysinit = SET_BEGIN(sysinit_set);
sysinit_end = SET_LIMIT(sysinit_set);
}
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
restart:
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/*
* Perform a bubble sort of the system initialization objects by
* their subsystem (primary key) and order (secondary key).
*/
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
for (sipp = sysinit; sipp < sysinit_end; sipp++) {
for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
if ((*sipp)->subsystem < (*xipp)->subsystem ||
((*sipp)->subsystem == (*xipp)->subsystem &&
Fix the SYSINIT() bubble sort. This was fixed in kern_linker.c already.
2000-08-02 21:05:21 +00:00
(*sipp)->order <= (*xipp)->order))
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
continue; /* skip*/
save = *sipp;
*sipp = *xipp;
*xipp = save;
}
}
/*
* Traverse the (now) ordered list of system initialization tasks.
* Perform each task, and continue on to the next task.
*
* The last item on the list is expected to be the scheduler,
* which will not return.
*/
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
for (sipp = sysinit; sipp < sysinit_end; sipp++) {
We have had support for running the kernel daemons as threads for quite a while, but forgot to do so. For now, this code supports most daemons running as kernel threads in UP kernels, and as full processes in SMP. We will soon be able to run them as threads in SMP, but not yet.
1997-12-12 04:00:59 +00:00
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
if ((*sipp)->subsystem == SI_SUB_DUMMY)
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
continue; /* skip dummy task(s)*/
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
if ((*sipp)->subsystem == SI_SUB_DONE)
continue;
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
/* Call function */
(*((*sipp)->func))((*sipp)->udata);
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
/* Check off the one we're just done */
(*sipp)->subsystem = SI_SUB_DONE;
/* Check if we've installed more sysinit items via KLD */
if (newsysinit != NULL) {
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
if (sysinit != SET_BEGIN(sysinit_set))
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
free(sysinit, M_TEMP);
sysinit = newsysinit;
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
sysinit_end = newsysinit_end;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
newsysinit = NULL;
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
newsysinit_end = NULL;
Implement merging SYSINIT's from preloaded KLD modules. This means we check off SYSINIT entries as they are run, and when more arrive, we re-sort and restart (skipping the already-run entries). This can *only* be done after KMEM (and malloc) is up and running - this is fine because KLD is the only consumer of this and it's done after that. The nice thing about this is that the SYSINIT's within preloaded KLD modules are executed in their natural order. It should be possible to register devices for the probes which follow, etc. (soon.. several key things prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
goto restart;
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
}
}
Man the liferafts! Here comes the long awaited SMP -> -current merge! There are various options documented in i386/conf/LINT, there is more to come over the next few days. The kernel should run pretty much "as before" without the options to activate SMP mode. There are a handful of known "loose ends" that need to be fixed, but have been put off since the SMP kernel is in a moderately good condition at the moment. This commit is the result of the tinkering and testing over the last 14 months by many people. A special thanks to Steve Passe for implementing the APIC code!
1997-04-26 11:46:25 +00:00
panic("Shouldn't get here!");
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/* NOTREACHED*/
}
/*
***************************************************************************
****
**** The following SYSINIT's belong elsewhere, but have not yet
**** been moved.
****
***************************************************************************
*/
Fix benign type mismatches and nested extern declarations in new sysinit code. Fix old and new missing prototypes.
1995-08-29 23:59:22 +00:00
static void
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
print_caddr_t(void *data __unused)
Fix benign type mismatches and nested extern declarations in new sysinit code. Fix old and new missing prototypes.
1995-08-29 23:59:22 +00:00
{
printf("%s", (char *)data);
}
Finished (?) cleaning up sysinit stuff.
1995-12-02 17:11:20 +00:00
SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
- Move the setting of bootverbose to a MI SI_SUB_TUNABLES SYSINIT. - Attach a writable sysctl to bootverbose (debug.bootverbose) so it can be toggled after boot. - Move the printf of the version string to a SI_SUB_COPYRIGHT SYSINIT just afer the display of the copyright message instead of doing it by hand in three MD places.
2001-05-17 22:28:46 +00:00
SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, version)
static void
set_boot_verbose(void *data __unused)
{
if (boothowto & RB_VERBOSE)
bootverbose++;
}
SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL)
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
Added fields for VM_MIN_ADDRESS, PS_STRINGS and stack protections to sysentvec. Initialized all fields of all sysentvecs, which will allow them to be used instead of constants in more places. Provided stack fixup routines for emulations that previously used the default.
2002-09-01 21:41:24 +00:00
struct sysentvec null_sysvec = {
0,
NULL,
0,
0,
NULL,
0,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
"null",
NULL,
NULL,
0,
PAGE_SIZE,
VM_MIN_ADDRESS,
VM_MAXUSER_ADDRESS,
USRSTACK,
PS_STRINGS,
VM_PROT_ALL,
NULL,
Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit systems where the data/stack/etc limits are too big for a 32 bit process. Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c. Supply an ia32_fixlimits function. Export the clip/default values to sysctl under the compat.ia32 heirarchy. Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max value rather than the sysctl tweakable variable. This allows mmap to place mappings at sensible locations when limits have been reduced. Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same method as mmap(0, ...) now does. Note that we cannot remove all references to the sysctl tweakable maxdsiz etc variables because /etc/login.conf specifies a datasize of 'unlimited'. And that causes exec etc to fail since it can no longer find space to mmap things.
2003-09-25 01:10:26 +00:00
NULL,
Added fields for VM_MIN_ADDRESS, PS_STRINGS and stack protections to sysentvec. Initialized all fields of all sysentvecs, which will allow them to be used instead of constants in more places. Provided stack fixup routines for emulations that previously used the default.
2002-09-01 21:41:24 +00:00
NULL
};
Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable handler in the kernel at the same time. Also, allow for the exec_new_vmspace() code to build a different sized vmspace depending on the executable environment. This is a big help for execing i386 binaries on ia64. The ELF exec code grows the ability to map partial pages when there is a page size difference, eg: emulating 4K pages on 8K or 16K hardware pages. Flesh out the i386 emulation support for ia64. At this point, the only binary that I know of that fails is cvsup, because the cvsup runtime tries to execute code in pages not marked executable. Obtained from: dfr (mostly, many tweaks from me).
2002-07-20 02:56:12 +00:00
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/*
***************************************************************************
****
Fix typo in comment. It's SYSINIT, not SYSINT. Approved by: re (murray)
2002-11-30 22:15:30 +00:00
**** The two following SYSINIT's are proc0 specific glue code. I am not
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
**** convinced that they can not be safely combined, but their order of
**** operation has been maintained as the same as the original init_main.c
**** for right now.
****
**** These probably belong in init_proc.c or kern_proc.c, since they
**** deal with proc0 (the fork template process).
****
***************************************************************************
*/
/* ARGSUSED*/
Last commit this round: Staticize. we are now down to about 1146 symbols being global, of which I estimate that about 100 are validly so.
1995-12-10 13:45:30 +00:00
static void
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
proc0_init(void *dummy __unused)
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
{
register struct proc *p;
register struct filedesc0 *fdp;
Fix signed/unsigned comparison warnings. Reviewed by: bde
1996-10-20 21:01:46 +00:00
register unsigned i;
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
2001-09-12 08:38:13 +00:00
struct thread *td;
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
struct ksegrp *kg;
struct kse *ke;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
With Alfred's permission, remove vm_mtx in favor of a fine-grained approach (this commit is just the first stage). Also add various GIANT_ macros to formalize the removal of Giant, making it easy to test in a more piecemeal fashion. These macros will allow us to test fine-grained locks to a degree before removing Giant, and also after, and to remove Giant in a piecemeal fashion via sysctl's on those subsystems which the authors believe can operate without Giant.
2001-07-04 16:20:28 +00:00
GIANT_REQUIRED;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
p = &proc0;
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
td = &thread0;
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.
2002-09-15 23:52:25 +00:00
ke = &kse0;
kg = &ksegrp0;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
- Implement a mechanism for allowing schedulers to place scheduler dependant data in the scheduler independant structures (proc, ksegrp, kse, thread). - Implement unused stubs for this mechanism in sched_4bsd. Approved by: re Reviewed by: luigi, trb Tested on: x86, alpha
2002-11-21 01:22:38 +00:00
ke->ke_sched = kse0_sched;
kg->kg_sched = ksegrp0_sched;
p->p_sched = proc0_sched;
td->td_sched = thread0_sched;
Major update to the way synchronization is done in the kernel. Highlights include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
2000-09-07 01:33:02 +00:00
/*
* Initialize magic number.
*/
p->p_magic = P_MAGIC;
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
/*
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
* Initialize thread, process and pgrp structures.
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
*/
procinit();
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..
2002-06-29 17:26:22 +00:00
threadinit();
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
Converted timer/run queues to 4.4BSD queue style. Removed old and unused sleep(). Implemented wakeup_one() which may be used in the future to combat the "thundering herd" problem for some special cases. Reviewed by: dyson
1996-07-31 09:26:54 +00:00
/*
* Initialize sleep queue hash table
*/
sleepinit();
Get rid of the ad-hoc memory allocator for vm_map_entries, in lieu of a simple, clean zone type allocator. This new allocator will also be used for machine dependent pmap PV entries.
1997-08-05 00:02:08 +00:00
/*
* additional VM structures
*/
vm_init2();
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Create process 0 (the swapper).
*/
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
LIST_INSERT_HEAD(&allproc, p, p_list);
Stick proc0 in the PID hash table.
2001-04-11 18:50:50 +00:00
LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
Change callers of mtx_init() to pass in an appropriate lock type name. In most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
p->p_pgrp = &pgrp0;
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
LIST_INIT(&pgrp0.pg_members);
LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
pgrp0.pg_session = &session0;
Change callers of mtx_init() to pass in an appropriate lock type name. In most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
session0.s_count = 1;
session0.s_leader = p;
Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable handler in the kernel at the same time. Also, allow for the exec_new_vmspace() code to build a different sized vmspace depending on the executable environment. This is a big help for execing i386 binaries on ia64. The ELF exec code grows the ability to map partial pages when there is a page size difference, eg: emulating 4K pages on 8K or 16K hardware pages. Flesh out the i386 emulation support for ia64. At this point, the only binary that I know of that fails is cvsup, because the cvsup runtime tries to execute code in pages not marked executable. Obtained from: dfr (mostly, many tweaks from me).
2002-07-20 02:56:12 +00:00
p->p_sysent = &null_sysvec;
Changes preparing for iBCS support Reviewed by: Submitted by:
1994-08-24 11:52:21 +00:00
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..
2002-06-29 17:26:22 +00:00
/*
* proc_linkup was already done in init_i386() or alphainit() etc.
* because the earlier code needed to follow td->td_proc. Otherwise
* I would have done it here.. maybe this means this should be
* done earlier too.
*/
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
p->p_flag = P_SYSTEM;
p->p_sflag = PS_INMEM;
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..
2002-06-29 17:26:22 +00:00
p->p_state = PRS_NORMAL;
td->td_state = TDS_RUNNING;
kg->kg_nice = NZERO;
kg->kg_pri_class = PRI_TIMESHARE;
kg->kg_user_pri = PUSER;
td->td_priority = PVM;
td->td_base_pri = PUSER;
td->td_kse = ke; /* XXXKSE */
Move the _oncpu entry from the KSE to the thread. The entry in the KSE still exists but it's purpose will change a bit when we add the ability to lock a KSE to a cpu.
2003-04-10 17:35:44 +00:00
td->td_oncpu = 0;
Thinking about it I came to the conclusion that the KSE states were incorrectly formulated. The correct states should be: IDLE: On the idle KSE list for that KSEG RUNQ: Linked onto the system run queue. THREAD: Attached to a thread and slaved to whatever state the thread is in. This means that most places where we were adjusting kse state can go away as it is just moving around because the thread is.. The only places we need to adjust the KSE state is in transition to and from the idle and run queues. Reviewed by: jhb@freebsd.org
2002-07-14 03:43:33 +00:00
ke->ke_state = KES_THREAD;
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..
2002-06-29 17:26:22 +00:00
ke->ke_thread = td;
Modifications to existing files to support the initial AIO/LIO and kernel based threading support.
1997-06-16 00:29:36 +00:00
p->p_peers = 0;
p->p_leader = p;
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..
2002-06-29 17:26:22 +00:00
Modifications to existing files to support the initial AIO/LIO and kernel based threading support.
1997-06-16 00:29:36 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
bcopy("swapper", p->p_comm, sizeof ("swapper"));
Change instances of callout_init that specify MPSAFE behaviour to use CALLOUT_MPSAFE instead of "1" for the second parameter. This does not change the behaviour; it just makes the intent more clear.
2003-08-19 17:51:11 +00:00
callout_init(&p->p_itcallout, CALLOUT_MPSAFE);
callout_init(&td->td_slpcallout, CALLOUT_MPSAFE);
Use callout_reset instead of timeout(9). Most callouts are statically allocated, 2 have been added to struct proc for setitimer and sleep. Reviewed by: jhb, jlemon
2000-11-27 22:52:31 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Create credentials. */
p->p_ucred = crget();
p->p_ucred->cr_ngroups = 1; /* group 0 */
Remove uidinfo hash table lookup and maintenance out of chgproccnt() and chgsbsize(), which are called rather frequently and may be called from an interrupt context in the case of chgsbsize(). Instead, do the hash table lookup and maintenance when credentials are changed, which is a lot less frequent. Add pointers to the uidinfo structures to the ucred and pcred structures for fast access. Pass a pointer to the credential to chgproccnt() and chgsbsize() instead of passing the uid. Add a reference count to the uidinfo structure and use it to decide when to free the structure rather than freeing the structure when the resource consumption drops to zero. Move the resource tracking code from kern_proc.c to kern_resource.c. Move some duplicate code sequences in kern_prot.c to separate helper functions. Change KASSERTs in this code to unconditional tests and calls to panic().
2000-09-05 22:11:13 +00:00
p->p_ucred->cr_uidinfo = uifind(0);
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
2001-05-25 16:59:11 +00:00
p->p_ucred->cr_ruidinfo = uifind(0);
o Move per-process jail pointer (p->pr_prison) to inside of the subject credential structure, ucred (cr->cr_prison). o Allow jail inheritence to be a function of credential inheritence. o Abstract prison structure reference counting behind pr_hold() and pr_free(), invoked by the similarly named credential reference management functions, removing this code from per-ABI fork/exit code. o Modify various jail() functions to use struct ucred arguments instead of struct proc arguments. o Introduce jailed() function to determine if a credential is jailed, rather than directly checking pointers all over the place. o Convert PRISON_CHECK() macro to prison_check() function. o Move jail() function prototypes to jail.h. o Emulate the P_JAILED flag in fill_kinfo_proc() and no longer set the flag in the process flags field itself. o Eliminate that "const" qualifier from suser/p_can/etc to reflect mutex use. Notes: o Some further cleanup of the linux/jail code is still required. o It's now possible to consider resolving some of the process vs credential based permission checking confusion in the socket code. o Mutex protection of struct prison is still not present, and is required to protect the reference count plus some fields in the structure. Reviewed by: freebsd-arch Obtained from: TrustedBSD Project
2001-02-21 06:39:57 +00:00
p->p_ucred->cr_prison = NULL; /* Don't jail it. */
Introduce support for Mandatory Access Control and extensible kernel access control. Invoke the necessary MAC entry points to maintain labels on process credentials. In particular, invoke entry points for the initialization and destruction of struct ucred, the copying of struct ucred, and permit the initial labels to be set for both process 0 (parent of all kernel processes) and process 1 (parent of all user processes). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-07-31 00:39:19 +00:00
#ifdef MAC
mac_create_proc0(p->p_ucred);
#endif
Add a per-thread ucred reference for syscalls and synchronous traps from userland. The per thread ucred reference is immutable and thus needs no locks to be read. However, until all the proc locking associated with writes to p_ucred are completed, it is still not safe to use the per-thread reference. Tested on: x86 (SMP), alpha, sparc64
2001-10-26 08:12:54 +00:00
td->td_ucred = crhold(p->p_ucred);
This Implements the mumbled about "Jail" feature. This is a seriously beefed up chroot kind of thing. The process is jailed along the same lines as a chroot does it, but with additional tough restrictions imposed on what the superuser can do. For all I know, it is safe to hand over the root bit inside a prison to the customer living in that prison, this is what it was developed for in fact: "real virtual servers". Each prison has an ip number associated with it, which all IP communications will be coerced to use and each prison has its own hostname. Needless to say, you need more RAM this way, but the advantage is that each customer can run their own particular version of apache and not stomp on the toes of their neighbors. It generally does what one would expect, but setting up a jail still takes a little knowledge. A few notes: I have no scripts for setting up a jail, don't ask me for them. The IP number should be an alias on one of the interfaces. mount a /proc in each jail, it will make ps more useable. /proc/<pid>/status tells the hostname of the prison for jailed processes. Quotas are only sensible if you have a mountpoint per prison. There are no privisions for stopping resource-hogging. Some "#ifdef INET" and similar may be missing (send patches!) If somebody wants to take it from here and develop it into more of a "virtual machine" they should be most welcome! Tools, comments, patches & documentation most welcome. Have fun... Sponsored by: http://www.rndassociates.com/ Run for almost a year by: http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00
- Merge struct procsig with struct sigacts. - Move struct sigacts out of the u-area and malloc() it using the M_SUBPROC malloc bucket. - Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(), sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared(). - Remove the p_sigignore, p_sigacts, and p_sigcatch macros. - Add a mutex to struct sigacts that protects all the members of the struct. - Add sigacts locking. - Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now that sigacts is locked. - Several in-kernel functions such as psignal(), tdsignal(), trapsignal(), and thread_stopped() are now MP safe. Reviewed by: arch@ Approved by: re (rwatson)
2003-05-13 20:36:02 +00:00
/* Create sigacts. */
p->p_sigacts = sigacts_alloc();
Reviewed by: Luoqi Chen, Jordan Hubbard Submitted by: "Richard Seaman, Jr." <lists@tar.com> Obtained from: linux :-) Code to allow Linux Threads to run under FreeBSD. By default not enabled This code is dependent on the conditional COMPAT_LINUX_THREADS (suggested by Garret) This is not yet a 'real' option but will be within some number of hours.
1998-12-19 02:55:34 +00:00
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
/* Initialize signal state for process 0. */
siginit(&proc0);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Create the file descriptor table. */
fdp = &filedesc0;
p->p_fd = &fdp->fd_fd;
Add tracking of process leaders sharing a file descriptor table and allow a file descriptor table to be shared between multiple process leaders. PR: 50923
2003-06-02 16:05:32 +00:00
p->p_fdtol = NULL;
Change callers of mtx_init() to pass in an appropriate lock type name. In most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
mtx_init(&fdp->fd_fd.fd_mtx, FILEDESC_LOCK_DESC, NULL, MTX_DEF);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
fdp->fd_fd.fd_refcnt = 1;
Remove the global variable 'cmask', which was used to initialize the fd_cmask field in the file descriptor structure for the first process indirectly from CMASK, and when an fd structure is initialized before being filled in, and instead just use CMASK. This appears to be an artifact left over from the initial integration of quotas into BSD. Suggested by: peter
2003-10-02 03:57:59 +00:00
fdp->fd_fd.fd_cmask = CMASK;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
fdp->fd_fd.fd_nfiles = NDFILE;
/* Create the limits structures. */
p->p_limit = &limit0;
for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
limit0.pl_rlimit[i].rlim_cur =
limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
Set the soft openfiles limit to maxfiles instead of to NOFILE. The limit is now only used by init, so it may as well be "infinite". Don't use RLIM_INFINITY, since setrlimit() doesn't allow setting that value. Use maxfiles instead of RLIM_INFINITY for the hard limit for the same reason. Similarly for the maxprocesses limits (use the "infinite" value of maxproc instead if MAXUPRC and RLIM_INFINITY). NOFILES, MAXUPRC, CHILD_MAX and OPEN_MAX are no longer used in /usr/src and should go away. Their values are almost guaranteed to be wrong now that login.conf exists, so anything that uses the values is broken. Unfortunately, there are probably a lot of ports that depend on them being defined. The global limits maxfilesperproc and maxprocperuid should go away too.
1997-01-27 12:43:36 +00:00
limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
i = ptoa(cnt.v_free_count);
limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
limit0.p_refcnt = 1;
- Move p_cpulimit to struct proc from struct plimit and protect it with sched_lock. This means that we no longer access p_limit in mi_switch() and the p_limit pointer can be protected by the proc lock. - Remove PRS_ZOMBIE check from CPU limit test in mi_switch(). PRS_ZOMBIE processes don't call mi_switch(), and even if they did there is no longer the danger of p_limit being NULL (which is what the original zombie check was added for). - When we bump the current processes soft CPU limit in ast(), just bump the private p_cpulimit instead of the shared rlimit. This fixes an XXX for some value of fix. There is still a (probably benign) bug in that this code doesn't check that the new soft limit exceeds the hard limit. Inspired by: bde (2)
2002-10-09 17:17:24 +00:00
p->p_cpulimit = RLIM_INFINITY;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Allocate a prototype map so we have something to fork. */
Hide access to vmspace:vm_pmap with inline function vmspace_pmap(). This is the preparation step for moving pmap storage out of vmspace proper. Reviewed by: Alan Cox <alc@cs.rice.edu> Matthew Dillion <dillon@apollo.backplane.com>
1999-02-19 14:25:37 +00:00
pmap_pinit0(vmspace_pmap(&vmspace0));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
p->p_vmspace = &vmspace0;
vmspace0.vm_refcnt = 1;
Use the fields in the sysentvec and in the vm map header in place of the constants VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK and PS_STRINGS. This is mainly so that they can be variable even for the native abi, based on different machine types. Get stack protections from the sysentvec too. This makes it trivial to map the stack non-executable for certain abis, on machines that support it.
2002-09-21 22:07:17 +00:00
vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser,
p->p_sysent->sv_maxuser);
Hide access to vmspace:vm_pmap with inline function vmspace_pmap(). This is the preparation step for moving pmap storage out of vmspace proper. Reviewed by: Alan Cox <alc@cs.rice.edu> Matthew Dillion <dillon@apollo.backplane.com>
1999-02-19 14:25:37 +00:00
vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Fix two bogons created by 'patch(1)' in my last commit.
1998-12-19 08:23:31 +00:00
/*
- Merge struct procsig with struct sigacts. - Move struct sigacts out of the u-area and malloc() it using the M_SUBPROC malloc bucket. - Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(), sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared(). - Remove the p_sigignore, p_sigacts, and p_sigcatch macros. - Add a mutex to struct sigacts that protects all the members of the struct. - Add sigacts locking. - Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now that sigacts is locked. - Several in-kernel functions such as psignal(), tdsignal(), trapsignal(), and thread_stopped() are now MP safe. Reviewed by: arch@ Approved by: re (rwatson)
2003-05-13 20:36:02 +00:00
* We continue to place resource usage info
* in the user struct so that it's pageable.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
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
2001-09-12 08:38:13 +00:00
p->p_stats = &p->p_uarea->u_stats;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
From Lite2: proc LIST changes call kern_proc.c:procinit() to initialize LISTs call to usrinfoinit() subsumed by procinit() Reviewed by: davidg & bde
1996-03-11 06:14:38 +00:00
* Charge root for one process.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
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
2001-05-25 16:59:11 +00:00
(void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
}
SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/* ARGSUSED*/
Last commit this round: Staticize. we are now down to about 1146 symbols being global, of which I estimate that about 100 are validly so.
1995-12-10 13:45:30 +00:00
static void
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
proc0_post(void *dummy __unused)
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
{
Time changes mark 2: * Figure out UTC relative to boottime. Four new functions provide time relative to boottime. * move "runtime" into struct proc. This helps fix the calcru() problem in SMP. * kill mono_time. * add timespec{add|sub|cmp} macros to time.h. (XXX: These may change!) * nanosleep, select & poll takes long sleeps one day at a time Reviewed by: bde Tested by: ache and others
1998-04-04 13:26:20 +00:00
struct timespec ts;
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
struct proc *p;
call srandom() during the boot to start the sequence with a slightly less predictable seed.
1996-09-23 04:37:54 +00:00
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
/*
Don't forget to update `switchticks' in corner cases (except for the alpha fork_trampoline(), forget it because it I believe it is only necessary for the unsupported SMP case).
1999-02-25 11:03:08 +00:00
* Now we can look at the time, having had a chance to verify the
More s/file system/filesystem/g
2002-05-16 21:28:32 +00:00
* time from the filesystem. Pretend that proc0 started now.
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
*/
Convert the allproc and proctree locks from lockmgr locks to sx locks.
2001-03-28 11:52:56 +00:00
sx_slock(&allproc_lock);
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
LIST_FOREACH(p, &allproc, p_list) {
Instead of recording the Unix time in a process when it starts, record the uptime. Where necessary, convert it back to Unix time by adding boottime to it. This fixes a potential problem in the accounting code, which would compute the elapsed time incorrectly if the Unix time was stepped during the lifetime of the process.
2003-05-01 16:59:23 +00:00
microuptime(&p->p_stats->p_start);
Convert p->p_runtime and PCPU(switchtime) to bintime format.
2002-02-22 13:32:01 +00:00
p->p_runtime.sec = 0;
p->p_runtime.frac = 0;
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
}
Convert the allproc and proctree locks from lockmgr locks to sx locks.
2001-03-28 11:52:56 +00:00
sx_sunlock(&allproc_lock);
Fix warning. s/microuptime()/binuptime()/ for switchtime initial value.
2002-02-26 01:03:39 +00:00
binuptime(PCPU_PTR(switchtime));
Major update to the way synchronization is done in the kernel. Highlights include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
2000-09-07 01:33:02 +00:00
PCPU_SET(switchticks, ticks);
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
call srandom() during the boot to start the sequence with a slightly less predictable seed.
1996-09-23 04:37:54 +00:00
/*
* Give the ``random'' number generator a thump.
*/
Time changes mark 2: * Figure out UTC relative to boottime. Four new functions provide time relative to boottime. * move "runtime" into struct proc. This helps fix the calcru() problem in SMP. * kill mono_time. * add timespec{add|sub|cmp} macros to time.h. (XXX: These may change!) * nanosleep, select & poll takes long sleeps one day at a time Reviewed by: bde Tested by: ache and others
1998-04-04 13:26:20 +00:00
nanotime(&ts);
srandom(ts.tv_sec ^ ts.tv_nsec);
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
}
SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/*
***************************************************************************
****
**** The following SYSINIT's and glue code should be moved to the
**** respective files on a per subsystem basis.
****
***************************************************************************
*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
/*
***************************************************************************
****
**** The following code probably belongs in another file, like
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
**** kern/init_init.c.
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
****
***************************************************************************
*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* List of paths to try when searching for "init".
*/
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
static char init_path[MAXPATHLEN] =
Allow the init_path to be customised in an embedded system using the INIT_PATH config option. Also fix two bugs which caused an infinite loop in none of the programs in the init_path were found. That code was obviously not tested!
1999-05-05 12:20:23 +00:00
#ifdef INIT_PATH
__XSTRING(INIT_PATH);
#else
Use colons instead of semi-colons to behave like UNIX instead of DOS. Suggested by: bde
1999-05-11 10:08:10 +00:00
"/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
Allow the init_path to be customised in an embedded system using the INIT_PATH config option. Also fix two bugs which caused an infinite loop in none of the programs in the init_path were found. That code was obviously not tested!
1999-05-05 12:20:23 +00:00
#endif
Add/correct description for some sysctl variables where it was missing. The description field is unused in -stable, so the MFC there is equivalent to a comment. It can be done at any time, i am just setting a reminder in 45 days when hopefully we are past 4.5-release. MFC after: 45 days
2001-12-16 16:07:20 +00:00
SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
"Path used to search the init process");
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
* Start the initial user process; try exec'ing each pathname in init_path.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
* The program is invoked with one argument containing the boot flags.
*/
static void
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
start_init(void *dummy)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
vm_offset_t addr;
struct execve_args args;
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
int options, error;
char *var, *path, *next, *s;
char *ucp, **uap, *arg0, *arg1;
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
2001-09-12 08:38:13 +00:00
struct thread *td;
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
struct proc *p;
In the devfs case, have initproc attempt the easy cases of mounting /dev. This works if /dev exists, or if / is read/write (nfsroot). If it is too hard, leave it up to init -d (which will probably fail if /dev does not exist, but there isn't much else we can do short of making a union mount on /). This means we get a proper /dev if you boot a 5.x kernel on a 4.x world, which I happen to do often (the ramdisks on our install netboot servers have 4.x userland worlds on them).
2001-09-15 11:15:22 +00:00
int init_does_devfs = 0;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_lock(&Giant);
Major update to the way synchronization is done in the kernel. Highlights include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
2000-09-07 01:33:02 +00:00
With Alfred's permission, remove vm_mtx in favor of a fine-grained approach (this commit is just the first stage). Also add various GIANT_ macros to formalize the removal of Giant, making it easy to test in a more piecemeal fashion. These macros will allow us to test fine-grained locks to a degree before removing Giant, and also after, and to remove Giant in a piecemeal fashion via sysctl's on those subsystems which the authors believe can operate without Giant.
2001-07-04 16:20:28 +00:00
GIANT_REQUIRED;
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
2001-09-12 08:38:13 +00:00
td = curthread;
p = td->td_proc;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Remove an unused argument in vfs_mountroot().
2002-07-03 08:52:37 +00:00
vfs_mountroot();
Move the mount of the root filesystem to happen in the init process before the exec if /sbin/init. This allows the scheduler to get started and kthreads a chance to run before we start filesystem operations.
2002-03-08 10:33:11 +00:00
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
/* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
panic("cannot find root vnode");
SMP Lock struct file, filedesc and the global file list. Seigo Tanimura (tanimura) posted the initial delta. I've polished it quite a bit reducing the need for locking and adapting it for KSE. Locks: 1 mutex in each filedesc protects all the fields. protects "struct file" initialization, while a struct file is being changed from &badfileops -> &pipeops or something the filedesc should be locked. 1 mutex in each struct file protects the refcount fields. doesn't protect anything else. the flags used for garbage collection have been moved to f_gcflag which was the FILLER short, this doesn't need locking because the garbage collection is a single threaded container. could likely be made to use a pool mutex. 1 sx lock for the global filelist. struct file * fhold(struct file *fp); /* increments reference count on a file */ struct file * fhold_locked(struct file *fp); /* like fhold but expects file to locked */ struct file * ffind_hold(struct thread *, int fd); /* finds the struct file in thread, adds one reference and returns it unlocked */ struct file * ffind_lock(struct thread *, int fd); /* ffind_hold, but returns file locked */ I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00
FILEDESC_LOCK(p->p_fd);
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
p->p_fd->fd_cdir = rootvnode;
VREF(p->p_fd->fd_cdir);
p->p_fd->fd_rdir = rootvnode;
The kernel did not hold a vnode reference associated with the `rootvnode' pointer, but vfs_syscalls.c's checkdirs() assumed that it did. This bug reliably caused a panic at reboot time if any filesystem had been mounted directly over /. The checkdirs() function is called at mount time to find any process fd_cdir or fd_rdir pointers referencing the covered mountpoint vnode. It transfers these to point at the root of the new filesystem. However, this process was not reversed at unmount time, so processes with a cwd/root at a mount point would unexpectedly lose their cwd/root following a mount-unmount cycle at that mountpoint. This change should fix both of the above issues. Start_init() now holds an extra vnode reference corresponding to `rootvnode', and dounmount() releases this reference when the root filesystem is unmounted just before reboot. Dounmount() now undoes the actions taken by checkdirs() at mount time; any process cdir/rdir pointers that reference the root vnode of the unmounted filesystem are transferred to the now-uncovered vnode. Reviewed by: bde, phk
2001-02-28 20:54:28 +00:00
VREF(p->p_fd->fd_rdir);
SMP Lock struct file, filedesc and the global file list. Seigo Tanimura (tanimura) posted the initial delta. I've polished it quite a bit reducing the need for locking and adapting it for KSE. Locks: 1 mutex in each filedesc protects all the fields. protects "struct file" initialization, while a struct file is being changed from &badfileops -> &pipeops or something the filedesc should be locked. 1 mutex in each struct file protects the refcount fields. doesn't protect anything else. the flags used for garbage collection have been moved to f_gcflag which was the FILLER short, this doesn't need locking because the garbage collection is a single threaded container. could likely be made to use a pool mutex. 1 sx lock for the global filelist. struct file * fhold(struct file *fp); /* increments reference count on a file */ struct file * fhold_locked(struct file *fp); /* like fhold but expects file to locked */ struct file * ffind_hold(struct thread *, int fd); /* finds the struct file in thread, adds one reference and returns it unlocked */ struct file * ffind_lock(struct thread *, int fd); /* ffind_hold, but returns file locked */ I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00
FILEDESC_UNLOCK(p->p_fd);
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
2001-09-12 08:38:13 +00:00
VOP_UNLOCK(rootvnode, 0, td);
Introduce support for Mandatory Access Control and extensible kernel access control. Invoke the necessary MAC entry points to maintain labels on mount structures. In particular, invoke entry points for intialization and destruction in various scenarios (root, non-root). Also introduce an entry point in the boot procedure following the mount of the root file system, but prior to the start of the userland init process to permit policies to perform further initialization. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-07-31 01:11:29 +00:00
#ifdef MAC
mac_create_root_mount(td->td_ucred, TAILQ_FIRST(&mountlist));
#endif
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
Originally when DEVFS was added, a global variable "devfs_present" was used to control code which were conditional on DEVFS' precense since this avoided the need for large-scale source pollution with #include "opt_geom.h" Now that we approach making DEVFS standard, replace these tests with an #ifdef to facilitate mechanical removal once DEVFS becomes non-optional. No functional change by this commit.
2003-01-19 11:03:07 +00:00
/*
* For disk based systems, we probably cannot do this yet
* since the fs will be read-only. But a NFS root
* might be ok. It is worth a shot.
*/
error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700);
if (error == EEXIST)
error = 0;
if (error == 0)
error = kernel_vmount(0, "fstype", "devfs",
"fspath", "/dev", NULL);
if (error != 0)
init_does_devfs = 1;
In the devfs case, have initproc attempt the easy cases of mounting /dev. This works if /dev exists, or if / is read/write (nfsroot). If it is too hard, leave it up to init -d (which will probably fail if /dev does not exist, but there isn't much else we can do short of making a union mount on /). This means we get a proper /dev if you boot a 5.x kernel on a 4.x world, which I happen to do often (the ramdisks on our install netboot servers have 4.x userland worlds on them).
2001-09-15 11:15:22 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Need just enough stack to hold the faked-up "execve()" arguments.
*/
Use the fields in the sysentvec and in the vm map header in place of the constants VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK and PS_STRINGS. This is mainly so that they can be variable even for the native abi, based on different machine types. Get stack protections from the sysentvec too. This makes it trivial to map the stack non-executable for certain abis, on machines that support it.
2002-09-21 22:07:17 +00:00
addr = p->p_sysent->sv_usrstack - PAGE_SIZE;
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
panic("init: couldn't allocate argument space");
p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
p->p_vmspace->vm_ssize = 1;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
if ((var = getenv("init_path")) != NULL) {
Use strlcpy() instead of strncpy() to copy NUL terminated strings for safety and consistency.
2002-10-17 20:03:38 +00:00
strlcpy(init_path, var, sizeof(init_path));
Rework the kernel environment subsystem. We now convert the static environment needed at boot time to a dynamic subsystem when VM is up. The dynamic kernel environment is protected by an sx lock. This adds some new functions to manipulate the kernel environment : freeenv(), setenv(), unsetenv() and testenv(). freeenv() has to be called after every getenv() when you have finished using the string. testenv() only tests if an environment variable is present, and doesn't require a freeenv() call. setenv() and unsetenv() are self explanatory. The kenv(2) syscall exports these new functionalities to userland, mainly for kenv(1). Reviewed by: peter
2002-04-17 13:06:36 +00:00
freeenv(var);
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
}
Allow the init_path to be customised in an embedded system using the INIT_PATH config option. Also fix two bugs which caused an infinite loop in none of the programs in the init_path were found. That code was obviously not tested!
1999-05-05 12:20:23 +00:00
for (path = init_path; *path != '\0'; path = next) {
Use colons instead of semi-colons to behave like UNIX instead of DOS. Suggested by: bde
1999-05-11 10:08:10 +00:00
while (*path == ':')
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
path++;
Allow the init_path to be customised in an embedded system using the INIT_PATH config option. Also fix two bugs which caused an infinite loop in none of the programs in the init_path were found. That code was obviously not tested!
1999-05-05 12:20:23 +00:00
if (*path == '\0')
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
break;
Use colons instead of semi-colons to behave like UNIX instead of DOS. Suggested by: bde
1999-05-11 10:08:10 +00:00
for (next = path; *next != '\0' && *next != ':'; next++)
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
/* nothing */ ;
if (bootverbose)
Fixed printf format errors on alpha.
1999-04-24 18:50:48 +00:00
printf("start_init: trying %.*s\n", (int)(next - path),
path);
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Move out the boot flag argument.
*/
options = 0;
Use the fields in the sysentvec and in the vm map header in place of the constants VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK and PS_STRINGS. This is mainly so that they can be variable even for the native abi, based on different machine types. Get stack protections from the sysentvec too. This makes it trivial to map the stack non-executable for certain abis, on machines that support it.
2002-09-21 22:07:17 +00:00
ucp = (char *)p->p_sysent->sv_usrstack;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
(void)subyte(--ucp, 0); /* trailing zero */
if (boothowto & RB_SINGLE) {
(void)subyte(--ucp, 's');
options = 1;
}
#ifdef notyet
if (boothowto & RB_FASTBOOT) {
(void)subyte(--ucp, 'f');
options = 1;
}
#endif
Changes to make FreeBSD use a CDROM as rootdev, for installation purposes. If "BOOTCDROM" is defined, you get this pretty special case stuff.
1995-04-10 07:44:31 +00:00
#ifdef BOOTCDROM
(void)subyte(--ucp, 'C');
options = 1;
Remove all traces of Julians DEVFS (incl from kern/subr_diskslice.c) Remove old DEVFS support fields from dev_t. Make uid, gid & mode members of dev_t and set them in make_dev(). Use correct uid, gid & mode in make_dev in disk minilayer. Add support for registering alias names for a dev_t using the new function make_dev_alias(). These will show up as symlinks in DEVFS. Use makedev() rather than make_dev() for MFSs magic devices to prevent DEVFS from noticing this abuse. Add a field for DEVFS inode number in dev_t. Add new DEVFS in fs/devfs. Add devfs cloning to: disk minilayer (ie: ad(4), sd(4), cd(4) etc etc) md(4), tun(4), bpf(4), fd(4) If DEVFS add -d flag to /sbin/inits args to make it mount devfs. Add commented out DEVFS to GENERIC
2000-08-20 21:34:39 +00:00
#endif
In the devfs case, have initproc attempt the easy cases of mounting /dev. This works if /dev exists, or if / is read/write (nfsroot). If it is too hard, leave it up to init -d (which will probably fail if /dev does not exist, but there isn't much else we can do short of making a union mount on /). This means we get a proper /dev if you boot a 5.x kernel on a 4.x world, which I happen to do often (the ramdisks on our install netboot servers have 4.x userland worlds on them).
2001-09-15 11:15:22 +00:00
if (init_does_devfs) {
Avoid the modules madness I inadvertently introduced by making the cloning infrastructure standard in kern_conf. Modules are now the same with or without devfs support. If you need to detect if devfs is present, in modules or elsewhere, check the integer variable "devfs_present". This happily removes an ugly hack from kern/vfs_conf.c. This forces a rename of the eventhandler and the standard clone helper function. Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include like <sys/queue.h> Remove all #includes of opt_devfs.h they no longer matter.
2000-09-02 19:17:34 +00:00
(void)subyte(--ucp, 'd');
options = 1;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (options == 0)
(void)subyte(--ucp, '-');
(void)subyte(--ucp, '-'); /* leading hyphen */
arg1 = ucp;
/*
* Move out the file name (also arg 0).
*/
Make the location of init(8) tunable at boot time.
1999-04-20 21:15:13 +00:00
(void)subyte(--ucp, 0);
for (s = next - 1; s >= path; s--)
(void)subyte(--ucp, *s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
arg0 = ucp;
/*
* Move out the arg pointers.
*/
Make sure that the argv pointers for init are aligned to the correct boundary on the alpha.
1998-10-06 11:55:40 +00:00
uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
Cast pointers to intptr_t instead of or before casting to long. Fixed bitrot in K&R support (suword() now takes a long word). Didn't fix corresponding bitrot in store.9 and fetch.9. The correct types for the store and fetch families are problematic. The `word' functions are unfortunately named and need to be split to handle ints/longs/object pointers/function pointers. Storing argv[] as longs is quite broken when longs are longer than pointers, but usually works because it clobbers variables that will soon be reinitialized.
1998-07-15 05:21:48 +00:00
(void)suword((caddr_t)--uap, (long)0); /* terminator */
(void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
(void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Point at the arguments.
*/
args.fname = arg0;
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
args.argv = uap;
args.envv = NULL;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Now try to exec the program. If can't for any reason
* other than it doesn't exist, complain.
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
1995-08-28 09:19:25 +00:00
*
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
* Otherwise, return via fork_trampoline() all the way
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
* to user mode as init!
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
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
2001-09-12 08:38:13 +00:00
if ((error = execve(td, &args)) == 0) {
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_unlock(&Giant);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return;
Release Giant before starting up init. Submitted by: jake
2000-09-15 19:25:29 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (error != ENOENT)
Fixed printf format errors on alpha.
1999-04-24 18:50:48 +00:00
printf("exec %.*s: error %d\n", (int)(next - path),
path, error);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
If we fail to find init, print out the search path used. This helps differentiate between one of three different scenarios: 1. No init. 2. Path to init munged by an incorrect loader configuration. 3. Root file system not mounted. Reviewed-by: billf
1999-12-20 02:50:49 +00:00
printf("init: not found in path %s\n", init_path);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
panic("no init");
}
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
/*
* Like kthread_create(), but runs in it's own address space.
* We do this early to reserve pid 1.
*
* Note special case - do not make it runnable yet. Other work
* in progress will change this more.
*/
static void
create_init(const void *udata __unused)
{
Divorce proc0 and proc1 credentials earlier; while this isn't technically needed in the current code, in the MAC tree, create_init() relies on the ability to modify the credentials present for initproc, and should not perform that modification on a shared credential. Pro-active diff reduction against MAC changes that are in the queue; also facilitates other work, including the capabilities implementation. Submitted by: green Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-04-19 13:35:53 +00:00
struct ucred *newcred, *oldcred;
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
int error;
Some kernel threads try to do significant work, and the default KSTACK_PAGES doesn't give them enough stack to do much before blowing away the pcb. This adds MI and MD code to allow the allocation of an alternate kstack who's size can be speficied when calling kthread_create. Passing the value 0 prevents the alternate kstack from being created. Note that the ia64 MD code is missing for now, and PowerPC was only partially written due to the pmap.c being incomplete there. Though this patch does not modify anything to make use of the alternate kstack, acpi and usb are good candidates. Reviewed by: jake, peter, jhb
2002-10-02 07:44:29 +00:00
error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc);
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
if (error)
panic("cannot fork init: %d\n", error);
Divorce proc0 and proc1 credentials earlier; while this isn't technically needed in the current code, in the MAC tree, create_init() relies on the ability to modify the credentials present for initproc, and should not perform that modification on a shared credential. Pro-active diff reduction against MAC changes that are in the queue; also facilitates other work, including the capabilities implementation. Submitted by: green Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-04-19 13:35:53 +00:00
/* divorce init's credentials from the kernel's */
newcred = crget();
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
PROC_LOCK(initproc);
initproc->p_flag |= P_SYSTEM;
Divorce proc0 and proc1 credentials earlier; while this isn't technically needed in the current code, in the MAC tree, create_init() relies on the ability to modify the credentials present for initproc, and should not perform that modification on a shared credential. Pro-active diff reduction against MAC changes that are in the queue; also facilitates other work, including the capabilities implementation. Submitted by: green Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-04-19 13:35:53 +00:00
oldcred = initproc->p_ucred;
crcopy(newcred, oldcred);
Introduce support for Mandatory Access Control and extensible kernel access control. Invoke the necessary MAC entry points to maintain labels on process credentials. In particular, invoke entry points for the initialization and destruction of struct ucred, the copying of struct ucred, and permit the initial labels to be set for both process 0 (parent of all kernel processes) and process 1 (parent of all user processes). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-07-31 00:39:19 +00:00
#ifdef MAC
mac_create_proc1(newcred);
#endif
Divorce proc0 and proc1 credentials earlier; while this isn't technically needed in the current code, in the MAC tree, create_init() relies on the ability to modify the credentials present for initproc, and should not perform that modification on a shared credential. Pro-active diff reduction against MAC changes that are in the queue; also facilitates other work, including the capabilities implementation. Submitted by: green Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-04-19 13:35:53 +00:00
initproc->p_ucred = newcred;
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
PROC_UNLOCK(initproc);
Divorce proc0 and proc1 credentials earlier; while this isn't technically needed in the current code, in the MAC tree, create_init() relies on the ability to modify the credentials present for initproc, and should not perform that modification on a shared credential. Pro-active diff reduction against MAC changes that are in the queue; also facilitates other work, including the capabilities implementation. Submitted by: green Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-04-19 13:35:53 +00:00
crfree(oldcred);
Refresh the credential on the first initproc thread following divorcing the initproc credential from the proc0 credential. Otherwise, the proc0 credential is used instead of initproc's credentil when authorizing start_init() activities prior to initproc hitting userland for the first time. This could result in the incorrect credential being used to authorize mounting of the root file system, which could in turn cause problems for NFS when used in combination with uid/gid ipfw rules, or with MAC. Discussed with: julian
2002-08-07 17:53:31 +00:00
cred_update_thread(FIRST_THREAD_IN_PROC(initproc));
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_lock_spin(&sched_lock);
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
initproc->p_sflag |= PS_INMEM;
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_unlock_spin(&sched_lock);
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL);
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
}
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
/*
* Make it runnable now.
*/
static void
kick_init(const void *udata __unused)
{
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
struct thread *td;
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
td = FIRST_THREAD_IN_PROC(initproc);
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_lock_spin(&sched_lock);
Completely redo thread states. Reviewed by: davidxu@freebsd.org
2002-09-11 08:13:56 +00:00
TD_SET_CAN_RUN(td);
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..
2002-06-29 17:26:22 +00:00
setrunqueue(td); /* XXXKSE */
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
mtx_unlock_spin(&sched_lock);
Clean up some low level bootstrap code: - stop using the evil 'struct trapframe' argument for mi_startup() (formerly main()). There are much better ways of doing it. - do not use prepare_usermode() - setregs() in execve() will do it all for us as long as the p_md.md_regs pointer is set. (which is now done in machdep.c rather than init_main.c. The Alpha port did it this way all along and is much cleaner). - collect all the magic %cr0 etc register settings into one place and have the AP's call that instead of using magic numbers (!!) that keep changing over and over again. - Make it safe to call kthread_create() earlier, including during the device probe sequence. It doesn't need the callback mechanism that NetBSD's version uses. - kthreads created this way are root-less as they exist before the root filesystem is mounted. init(1) is set up so that it aquires the root pointers prior to running. If other kthreads want filesystem acccess we can make this code more generic. - set all threads start times once we have decided what time it is. - init uses a trampoline rather than the evil prepare_usermode() hack. - kern_descrip.c has a couple of tweaks to deal with forking when there is no rootdir or cwd etc. - adjust the early SYSINIT() sequence so that a few prereqisites are in place. eg: make sure the run queue is initialized before doing forks. With this, the USB code can easily create a kthread to do the device tree discovery. (I have tested it, it works nicely). There are still some open issues before this is truely useful. - tsleep() does not like working before the clock is running. It sort-of tries to spin wait, but it can do more useful things now. - stopping a kthread in kld code at unload time is "interesting" but we have a solution for that. The Alpha code needs no changes for this. It already uses pretty much the same strategies, but a little cleaner.
2000-08-11 09:05:12 +00:00
}
- Catch up to p_sflag changes. - The MD code now initializes proc0.p_heldmtx, proc0.p_contested, and curproc. - The MD code calls here with Giant already held. - Proc locking.
2001-01-24 10:40:56 +00:00
SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
Reference in New Issue Copy Permalink