init_main.c (af4b2d2d1cbe098025b9aa63c6682e069be82913) init_main.c (37b087a645354d60200c774d51b305b268e41c83)
1/*
2 * Copyright (c) 1995 Terrence R. Lambert
3 * All rights reserved.
4 *
5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed

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69#include <sys/lock.h>
70#include <vm/pmap.h>
71#include <vm/vm_map.h>
72#include <sys/user.h>
73#include <sys/copyright.h>
74
75extern struct linker_set sysinit_set; /* XXX */
76
1/*
2 * Copyright (c) 1995 Terrence R. Lambert
3 * All rights reserved.
4 *
5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed

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69#include <sys/lock.h>
70#include <vm/pmap.h>
71#include <vm/vm_map.h>
72#include <sys/user.h>
73#include <sys/copyright.h>
74
75extern struct linker_set sysinit_set; /* XXX */
76
77extern void mi_startup __P((void *framep));
77void mi_startup(void); /* Should be elsewhere */
78
79/* Components of the first process -- never freed. */
80static struct session session0;
81static struct pgrp pgrp0;
82struct proc proc0;
83static struct pcred cred0;
84static struct procsig procsig0;
85static struct filedesc0 filedesc0;

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90int cmask = CMASK;
91extern struct user *proc0paddr;
92
93struct vnode *rootvp;
94int boothowto = 0; /* initialized so that it can be patched */
95SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
96
97/*
78
79/* Components of the first process -- never freed. */
80static struct session session0;
81static struct pgrp pgrp0;
82struct proc proc0;
83static struct pcred cred0;
84static struct procsig procsig0;
85static struct filedesc0 filedesc0;

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90int cmask = CMASK;
91extern struct user *proc0paddr;
92
93struct vnode *rootvp;
94int boothowto = 0; /* initialized so that it can be patched */
95SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
96
97/*
98 * Promiscuous argument pass for start_init()
99 *
100 * This is a kludge because we use a return from mi_startup() rather than a call
101 * to a new routine in locore.s to kick the kernel alive from locore.s.
102 */
103static void *init_framep;
104
105/*
106 * This ensures that there is at least one entry so that the sysinit_set
107 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
108 * executed.
109 */
98 * This ensures that there is at least one entry so that the sysinit_set
99 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
100 * executed.
101 */
110SYSINIT(placeholder, SI_SUB_DUMMY,SI_ORDER_ANY, NULL, NULL)
102SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
111
112/*
113 * The sysinit table itself. Items are checked off as the are run.
114 * If we want to register new sysinit types, add them to newsysinit.
115 */
116struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
117struct sysinit **newsysinit;
118
119/*
120 * Merge a new sysinit set into the current set, reallocating it if
121 * necessary. This can only be called after malloc is running.
122 */
123void
103
104/*
105 * The sysinit table itself. Items are checked off as the are run.
106 * If we want to register new sysinit types, add them to newsysinit.
107 */
108struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
109struct sysinit **newsysinit;
110
111/*
112 * Merge a new sysinit set into the current set, reallocating it if
113 * necessary. This can only be called after malloc is running.
114 */
115void
124sysinit_add(set)
125 struct sysinit **set;
116sysinit_add(struct sysinit **set)
126{
127 struct sysinit **newset;
128 struct sysinit **sipp;
129 struct sysinit **xipp;
130 int count = 0;
131
132 if (newsysinit)
133 for (sipp = newsysinit; *sipp; sipp++)

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163 * startup(), which does memory initialization and autoconfiguration.
164 *
165 * This allows simple addition of new kernel subsystems that require
166 * boot time initialization. It also allows substitution of subsystem
167 * (for instance, a scheduler, kernel profiler, or VM system) by object
168 * module. Finally, it allows for optional "kernel threads".
169 */
170void
117{
118 struct sysinit **newset;
119 struct sysinit **sipp;
120 struct sysinit **xipp;
121 int count = 0;
122
123 if (newsysinit)
124 for (sipp = newsysinit; *sipp; sipp++)

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154 * startup(), which does memory initialization and autoconfiguration.
155 *
156 * This allows simple addition of new kernel subsystems that require
157 * boot time initialization. It also allows substitution of subsystem
158 * (for instance, a scheduler, kernel profiler, or VM system) by object
159 * module. Finally, it allows for optional "kernel threads".
160 */
161void
171mi_startup(framep)
172 void *framep;
162mi_startup(void)
173{
174
175 register struct sysinit **sipp; /* system initialization*/
176 register struct sysinit **xipp; /* interior loop of sort*/
177 register struct sysinit *save; /* bubble*/
178
163{
164
165 register struct sysinit **sipp; /* system initialization*/
166 register struct sysinit **xipp; /* interior loop of sort*/
167 register struct sysinit *save; /* bubble*/
168
179 /*
180 * Copy the locore.s frame pointer for proc0, this is forked into
181 * all other processes.
182 */
183 init_framep = framep;
184
185restart:
186 /*
187 * Perform a bubble sort of the system initialization objects by
188 * their subsystem (primary key) and order (secondary key).
189 */
190 for (sipp = sysinit; *sipp; sipp++) {
191 for (xipp = sipp + 1; *xipp; xipp++) {
192 if ((*sipp)->subsystem < (*xipp)->subsystem ||

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238/*
239 ***************************************************************************
240 ****
241 **** The following SYSINIT's belong elsewhere, but have not yet
242 **** been moved.
243 ****
244 ***************************************************************************
245 */
169restart:
170 /*
171 * Perform a bubble sort of the system initialization objects by
172 * their subsystem (primary key) and order (secondary key).
173 */
174 for (sipp = sysinit; *sipp; sipp++) {
175 for (xipp = sipp + 1; *xipp; xipp++) {
176 if ((*sipp)->subsystem < (*xipp)->subsystem ||

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222/*
223 ***************************************************************************
224 ****
225 **** The following SYSINIT's belong elsewhere, but have not yet
226 **** been moved.
227 ****
228 ***************************************************************************
229 */
246static void print_caddr_t __P((void *data));
247static void
230static void
248print_caddr_t(data)
249 void *data;
231print_caddr_t(void *data __unused)
250{
251 printf("%s", (char *)data);
252}
253SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
254
255
256/*
257 ***************************************************************************

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262 **** for right now.
263 ****
264 **** These probably belong in init_proc.c or kern_proc.c, since they
265 **** deal with proc0 (the fork template process).
266 ****
267 ***************************************************************************
268 */
269/* ARGSUSED*/
232{
233 printf("%s", (char *)data);
234}
235SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
236
237
238/*
239 ***************************************************************************

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244 **** for right now.
245 ****
246 **** These probably belong in init_proc.c or kern_proc.c, since they
247 **** deal with proc0 (the fork template process).
248 ****
249 ***************************************************************************
250 */
251/* ARGSUSED*/
270static void proc0_init __P((void *dummy));
271static void
252static void
272proc0_init(dummy)
273 void *dummy;
253proc0_init(void *dummy __unused)
274{
275 register struct proc *p;
276 register struct filedesc0 *fdp;
277 register unsigned i;
278
279 p = &proc0;
280
281 /*

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309 p->p_sysent = &aout_sysvec;
310
311 p->p_flag = P_INMEM | P_SYSTEM;
312 p->p_stat = SRUN;
313 p->p_nice = NZERO;
314 p->p_rtprio.type = RTP_PRIO_NORMAL;
315 p->p_rtprio.prio = 0;
316
254{
255 register struct proc *p;
256 register struct filedesc0 *fdp;
257 register unsigned i;
258
259 p = &proc0;
260
261 /*

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289 p->p_sysent = &aout_sysvec;
290
291 p->p_flag = P_INMEM | P_SYSTEM;
292 p->p_stat = SRUN;
293 p->p_nice = NZERO;
294 p->p_rtprio.type = RTP_PRIO_NORMAL;
295 p->p_rtprio.prio = 0;
296
317/*
318 * Link for kernel based threads
319 */
320 p->p_peers = 0;
321 p->p_leader = p;
322
323 bcopy("swapper", p->p_comm, sizeof ("swapper"));
324
325 /* Create credentials. */
326 cred0.p_refcnt = 1;
327 p->p_cred = &cred0;
328 p->p_ucred = crget();
329 p->p_ucred->cr_ngroups = 1; /* group 0 */
330
331 /* Don't jail it */
332 p->p_prison = 0;
333
334 /* Create procsig. */
335 p->p_procsig = &procsig0;
336 p->p_procsig->ps_refcnt = 1;
337
297 p->p_peers = 0;
298 p->p_leader = p;
299
300 bcopy("swapper", p->p_comm, sizeof ("swapper"));
301
302 /* Create credentials. */
303 cred0.p_refcnt = 1;
304 p->p_cred = &cred0;
305 p->p_ucred = crget();
306 p->p_ucred->cr_ngroups = 1; /* group 0 */
307
308 /* Don't jail it */
309 p->p_prison = 0;
310
311 /* Create procsig. */
312 p->p_procsig = &procsig0;
313 p->p_procsig->ps_refcnt = 1;
314
315 /* Initialize signal state for process 0. */
316 siginit(&proc0);
317
338 /* Create the file descriptor table. */
339 fdp = &filedesc0;
340 p->p_fd = &fdp->fd_fd;
341 fdp->fd_fd.fd_refcnt = 1;
342 fdp->fd_fd.fd_cmask = cmask;
343 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
344 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
345 fdp->fd_fd.fd_nfiles = NDFILE;

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355 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
356 i = ptoa(cnt.v_free_count);
357 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
358 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
359 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
360 limit0.p_cpulimit = RLIM_INFINITY;
361 limit0.p_refcnt = 1;
362
318 /* Create the file descriptor table. */
319 fdp = &filedesc0;
320 p->p_fd = &fdp->fd_fd;
321 fdp->fd_fd.fd_refcnt = 1;
322 fdp->fd_fd.fd_cmask = cmask;
323 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
324 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
325 fdp->fd_fd.fd_nfiles = NDFILE;

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335 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
336 i = ptoa(cnt.v_free_count);
337 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
338 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
339 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
340 limit0.p_cpulimit = RLIM_INFINITY;
341 limit0.p_refcnt = 1;
342
363
364 /* Allocate a prototype map so we have something to fork. */
365 pmap_pinit0(vmspace_pmap(&vmspace0));
366 p->p_vmspace = &vmspace0;
367 vmspace0.vm_refcnt = 1;
368 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
369 trunc_page(VM_MAXUSER_ADDRESS));
370 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
371 p->p_addr = proc0paddr; /* XXX */
372
343 /* Allocate a prototype map so we have something to fork. */
344 pmap_pinit0(vmspace_pmap(&vmspace0));
345 p->p_vmspace = &vmspace0;
346 vmspace0.vm_refcnt = 1;
347 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
348 trunc_page(VM_MAXUSER_ADDRESS));
349 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
350 p->p_addr = proc0paddr; /* XXX */
351
373#ifdef cpu_set_init_frame
374 /*
352 /*
375 * proc0 needs to have a coherent frame base in its stack.
376 */
377 cpu_set_init_frame(p, init_framep); /* XXX! */
378#endif
379
380 /*
381 * We continue to place resource usage info and signal
382 * actions in the user struct so they're pageable.
383 */
384 p->p_stats = &p->p_addr->u_stats;
385 p->p_sigacts = &p->p_addr->u_sigacts;
386
387 /*
388 * Charge root for one process.

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394 * any possible traps/probes to simplify trap processing.
395 */
396 SET_CURPROC(p);
397
398}
399SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
400
401/* ARGSUSED*/
353 * We continue to place resource usage info and signal
354 * actions in the user struct so they're pageable.
355 */
356 p->p_stats = &p->p_addr->u_stats;
357 p->p_sigacts = &p->p_addr->u_sigacts;
358
359 /*
360 * Charge root for one process.

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366 * any possible traps/probes to simplify trap processing.
367 */
368 SET_CURPROC(p);
369
370}
371SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
372
373/* ARGSUSED*/
402static void proc0_post __P((void *dummy));
403static void
374static void
404proc0_post(dummy)
405 void *dummy;
375proc0_post(void *dummy __unused)
406{
407 struct timespec ts;
376{
377 struct timespec ts;
378 struct proc *p;
408
409 /*
410 * Now we can look at the time, having had a chance to verify the
411 * time from the file system. Pretend that proc0 started now.
412 */
379
380 /*
381 * Now we can look at the time, having had a chance to verify the
382 * time from the file system. Pretend that proc0 started now.
383 */
413 microtime(&proc0.p_stats->p_start);
414 proc0.p_runtime = 0;
384 LIST_FOREACH(p, &allproc, p_list) {
385 microtime(&p->p_stats->p_start);
386 p->p_runtime = 0;
387 }
415 microuptime(&switchtime);
416 switchticks = ticks;
417
418 /*
419 * Give the ``random'' number generator a thump.
420 */
421 nanotime(&ts);
422 srandom(ts.tv_sec ^ ts.tv_nsec);
388 microuptime(&switchtime);
389 switchticks = ticks;
390
391 /*
392 * Give the ``random'' number generator a thump.
393 */
394 nanotime(&ts);
395 srandom(ts.tv_sec ^ ts.tv_nsec);
423
424 /* Initialize signal state for process 0. */
425 siginit(&proc0);
426}
427SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
428
396}
397SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
398
429
430
431
432/*
433 ***************************************************************************
434 ****
435 **** The following SYSINIT's and glue code should be moved to the
436 **** respective files on a per subsystem basis.
437 ****
438 ***************************************************************************
439 */
440
399/*
400 ***************************************************************************
401 ****
402 **** The following SYSINIT's and glue code should be moved to the
403 **** respective files on a per subsystem basis.
404 ****
405 ***************************************************************************
406 */
407
441/* ARGSUSED*/
442static void xxx_vfs_root_fdtab __P((void *dummy));
443static void
444xxx_vfs_root_fdtab(dummy)
445 void *dummy;
446{
447 register struct filedesc0 *fdp = &filedesc0;
448
408
449 /* Get the vnode for '/'. Set fdp->fd_fd.fd_cdir to reference it. */
450 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
451 panic("cannot find root vnode");
452 fdp->fd_fd.fd_cdir = rootvnode;
453 VREF(fdp->fd_fd.fd_cdir);
454 VOP_UNLOCK(rootvnode, 0, &proc0);
455 fdp->fd_fd.fd_rdir = rootvnode;
456}
457SYSINIT(retrofit, SI_SUB_ROOT_FDTAB, SI_ORDER_FIRST, xxx_vfs_root_fdtab, NULL)
458
459
460/*
461 ***************************************************************************
462 ****
463 **** The following code probably belongs in another file, like
409/*
410 ***************************************************************************
411 ****
412 **** The following code probably belongs in another file, like
464 **** kern/init_init.c. It is here for two reasons only:
413 **** kern/init_init.c.
465 ****
414 ****
466 **** 1) This code returns to startup the system; this is
467 **** abnormal for a kernel thread.
468 **** 2) This code promiscuously uses init_frame
469 ****
470 ***************************************************************************
471 */
472
415 ***************************************************************************
416 */
417
473extern void prepare_usermode __P((void));
474static void create_init __P((const void *dummy));
475static void start_init __P((void *dummy));
476SYSINIT(init,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, create_init, NULL)
477
478/*
418
419/*
479 * Like kthread_create(), but runs in it's own address space.
480 */
481static void
482create_init(udata)
483 const void *udata;
484{
485 int error;
486
487 error = fork1(&proc0, RFFDG | RFPROC, &initproc);
488 if (error)
489 panic("cannot fork init: %d\n", error);
490 initproc->p_flag |= P_INMEM | P_SYSTEM;
491 cpu_set_fork_handler(initproc, start_init, NULL);
492}
493
494/*
495 * List of paths to try when searching for "init".
496 */
497static char init_path[MAXPATHLEN] =
498#ifdef INIT_PATH
499 __XSTRING(INIT_PATH);
500#else
501 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
502#endif
503SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
504
505/*
506 * Start the initial user process; try exec'ing each pathname in init_path.
507 * The program is invoked with one argument containing the boot flags.
508 */
509static void
420 * List of paths to try when searching for "init".
421 */
422static char init_path[MAXPATHLEN] =
423#ifdef INIT_PATH
424 __XSTRING(INIT_PATH);
425#else
426 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
427#endif
428SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
429
430/*
431 * Start the initial user process; try exec'ing each pathname in init_path.
432 * The program is invoked with one argument containing the boot flags.
433 */
434static void
510start_init(dummy)
511 void *dummy;
435start_init(void *dummy)
512{
513 vm_offset_t addr;
514 struct execve_args args;
515 int options, error;
516 char *var, *path, *next, *s;
517 char *ucp, **uap, *arg0, *arg1;
518 struct proc *p;
519
520 p = curproc;
521
436{
437 vm_offset_t addr;
438 struct execve_args args;
439 int options, error;
440 char *var, *path, *next, *s;
441 char *ucp, **uap, *arg0, *arg1;
442 struct proc *p;
443
444 p = curproc;
445
446 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
447 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
448 panic("cannot find root vnode");
449 p->p_fd->fd_cdir = rootvnode;
450 VREF(p->p_fd->fd_cdir);
451 p->p_fd->fd_rdir = rootvnode;
452 VOP_UNLOCK(rootvnode, 0, p);
453
522 /*
523 * Need just enough stack to hold the faked-up "execve()" arguments.
524 */
525 addr = trunc_page(USRSTACK - PAGE_SIZE);
526 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
527 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
528 panic("init: couldn't allocate argument space");
529 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;

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593 args.fname = arg0;
594 args.argv = uap;
595 args.envv = NULL;
596
597 /*
598 * Now try to exec the program. If can't for any reason
599 * other than it doesn't exist, complain.
600 *
454 /*
455 * Need just enough stack to hold the faked-up "execve()" arguments.
456 */
457 addr = trunc_page(USRSTACK - PAGE_SIZE);
458 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
459 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
460 panic("init: couldn't allocate argument space");
461 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;

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525 args.fname = arg0;
526 args.argv = uap;
527 args.envv = NULL;
528
529 /*
530 * Now try to exec the program. If can't for any reason
531 * other than it doesn't exist, complain.
532 *
601 * Otherwise, return via the fork trampoline all the way
533 * Otherwise, return via fork_trampoline() all the way
602 * to user mode as init!
603 */
534 * to user mode as init!
535 */
604 if ((error = execve(p, &args)) == 0) {
605 prepare_usermode();
536 if ((error = execve(p, &args)) == 0)
606 return;
537 return;
607 }
608 if (error != ENOENT)
609 printf("exec %.*s: error %d\n", (int)(next - path),
610 path, error);
611 }
612 printf("init: not found in path %s\n", init_path);
613 panic("no init");
614}
538 if (error != ENOENT)
539 printf("exec %.*s: error %d\n", (int)(next - path),
540 path, error);
541 }
542 printf("init: not found in path %s\n", init_path);
543 panic("no init");
544}
545
546/*
547 * Like kthread_create(), but runs in it's own address space.
548 * We do this early to reserve pid 1.
549 *
550 * Note special case - do not make it runnable yet. Other work
551 * in progress will change this more.
552 */
553static void
554create_init(const void *udata __unused)
555{
556 int error;
557 int s;
558
559 s = splhigh();
560 error = fork1(&proc0, RFFDG | RFPROC, &initproc);
561 if (error)
562 panic("cannot fork init: %d\n", error);
563 initproc->p_flag |= P_INMEM | P_SYSTEM;
564 cpu_set_fork_handler(initproc, start_init, NULL);
565 remrunqueue(initproc);
566 splx(s);
567}
568SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
569
570/*
571 * Make it runnable now.
572 */
573static void
574kick_init(const void *udata __unused)
575{
576 setrunqueue(initproc);
577}
578SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)