1/* $NetBSD: proc.h,v 1.373 2023/10/04 20:52:07 ad Exp $ */
2
3/*-
4 * Copyright (c) 2006, 2007, 2008, 2020, 2023 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*-
33 * Copyright (c) 1986, 1989, 1991, 1993
34 * The Regents of the University of California. All rights reserved.
35 * (c) UNIX System Laboratories, Inc.
36 * All or some portions of this file are derived from material licensed
37 * to the University of California by American Telephone and Telegraph
38 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
39 * the permission of UNIX System Laboratories, Inc.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)proc.h 8.15 (Berkeley) 5/19/95
66 */
67
68#ifndef _SYS_PROC_H_
69#define _SYS_PROC_H_
70
71#include <sys/lwp.h>
72
73#if defined(_KMEMUSER) || defined(_KERNEL)
74
75#if defined(_KERNEL_OPT)
76#include "opt_multiprocessor.h"
77#include "opt_kstack.h"
78#include "opt_lockdebug.h"
79#endif
80
81#include <machine/proc.h> /* Machine-dependent proc substruct */
82#include <machine/pcb.h>
83#include <sys/aio.h>
84#include <sys/idtype.h>
85#include <sys/rwlock.h>
86#include <sys/mqueue.h>
87#include <sys/mutex.h>
88#include <sys/condvar.h>
89#include <sys/queue.h>
90#include <sys/radixtree.h>
91#include <sys/signalvar.h>
92#include <sys/siginfo.h>
93#include <sys/event.h>
94#include <sys/specificdata.h>
95
96#ifdef _KERNEL
97#include <sys/resourcevar.h>
98#else
99#include <sys/time.h>
100#include <sys/resource.h>
101#endif
102
103/*
104 * One structure allocated per session.
105 */
106struct session {
107 int s_count; /* Ref cnt; pgrps in session */
108 u_int s_flags;
109#define S_LOGIN_SET 1 /* s_login set in this session */
110 struct proc *s_leader; /* Session leader */
111 struct vnode *s_ttyvp; /* Vnode of controlling terminal */
112 struct tty *s_ttyp; /* Controlling terminal */
113 char s_login[MAXLOGNAME]; /* Setlogin() name */
114 pid_t s_sid; /* Session ID (pid of leader) */
115};
116
117/*
118 * One structure allocated per process group.
119 */
120struct pgrp {
121 LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members */
122 struct session *pg_session; /* Pointer to session */
123 pid_t pg_id; /* Pgrp id */
124 int pg_jobc; /*
125 * Number of processes qualifying
126 * pgrp for job control
127 */
128};
129
130/*
131 * Autoloadable syscall definition
132 */
133struct sc_autoload {
134 u_int al_code;
135 const char *al_module;
136};
137
138/*
139 * One structure allocated per emulation.
140 */
141struct exec_package;
142struct ras;
143struct kauth_cred;
144
145struct emul {
146 const char *e_name; /* Symbolic name */
147 const char *e_path; /* Extra emulation path (NULL if none)*/
148#ifndef __HAVE_MINIMAL_EMUL
149 int e_flags; /* Miscellaneous flags, see above */
150 /* Syscall handling function */
151 const int *e_errno; /* Errno array */
152 int e_nosys; /* Offset of the nosys() syscall */
153 int e_nsysent; /* Number of system call entries */
154#endif
155 struct sysent *e_sysent; /* System call array */
156 const uint32_t *e_nomodbits; /* sys_nosys/sys_nomodule flags
157 * for syscall_disestablish() */
158 const char * const *e_syscallnames; /* System call name array */
159 struct sc_autoload *e_sc_autoload; /* List of autoloadable syscalls */
160 /* Signal sending function */
161 void (*e_sendsig)(const struct ksiginfo *,
162 const sigset_t *);
163 void (*e_trapsignal)(struct lwp *, struct ksiginfo *);
164 char *e_sigcode; /* Start of sigcode */
165 char *e_esigcode; /* End of sigcode */
166 /* Set registers before execution */
167 struct uvm_object **e_sigobject;/* shared sigcode object */
168 void (*e_setregs)(struct lwp *, struct exec_package *,
169 vaddr_t);
170
171 /* Per-process hooks */
172 void (*e_proc_exec)(struct proc *, struct exec_package *);
173 void (*e_proc_fork)(struct proc *, struct lwp *, int);
174 void (*e_proc_exit)(struct proc *);
175 void (*e_lwp_fork)(struct lwp *, struct lwp *);
176 void (*e_lwp_exit)(struct lwp *);
177
178#ifdef __HAVE_SYSCALL_INTERN
179 void (*e_syscall_intern)(struct proc *);
180#else
181 void (*e_syscall)(void);
182#endif
183 /* Emulation specific sysctl data */
184 struct sysctlnode *e_sysctlovly;
185
186 vaddr_t (*e_vm_default_addr)(struct proc *, vaddr_t, vsize_t,
187 int);
188
189 /* Emulation-specific hook for userspace page faults */
190 int (*e_usertrap)(struct lwp *, vaddr_t, void *);
191
192 size_t e_ucsize; /* size of ucontext_t */
193 void (*e_startlwp)(void *);
194
195 /* Dtrace syscall probe */
196 void (*e_dtrace_syscall)(uint32_t, register_t,
197 const struct sysent *, const void *,
198 const register_t *, int);
199
200 /* Emulation specific support for ktracing signal posts */
201 void (*e_ktrpsig)(int, sig_t, const sigset_t *,
202 const struct ksiginfo *);
203};
204
205/*
206 * Emulation miscellaneous flags
207 */
208#define EMUL_HAS_SYS___syscall 0x001 /* Has SYS___syscall */
209
210/*
211 * Description of a process.
212 *
213 * This structure contains the information needed to manage a thread of
214 * control, known in UN*X as a process; it has references to substructures
215 * containing descriptions of things that the process uses, but may share
216 * with related processes. The process structure and the substructures
217 * are always addressible except for those marked "(PROC ONLY)" below,
218 * which might be addressible only on a processor on which the process
219 * is running.
220 *
221 * Field markings and the corresponding locks:
222 *
223 * a: p_auxlock
224 * k: ktrace_mutex
225 * l: proc_lock
226 * t: p_stmutex
227 * p: p_lock
228 * (: updated atomically
229 * :: unlocked, stable
230 */
231struct vmspace;
232
233struct proc {
234 LIST_ENTRY(proc) p_list; /* l: List of all processes */
235 kmutex_t *p_lock; /* :: general mutex */
236 kcondvar_t p_waitcv; /* p: wait, stop CV on children */
237 kcondvar_t p_lwpcv; /* p: wait, stop CV on LWPs */
238
239 /* Substructures: */
240 struct kauth_cred *p_cred; /* p: Master copy of credentials */
241 struct filedesc *p_fd; /* :: Ptr to open files structure */
242 struct cwdinfo *p_cwdi; /* :: cdir/rdir/cmask info */
243 struct pstats *p_stats; /* :: Accounting/stats (PROC ONLY) */
244 struct plimit *p_limit; /* :: Process limits */
245 struct vmspace *p_vmspace; /* :: Address space */
246 struct sigacts *p_sigacts; /* :: Process sigactions */
247 struct aioproc *p_aio; /* p: Asynchronous I/O data */
248 u_int p_mqueue_cnt; /* (: Count of open message queues */
249 specificdata_reference
250 p_specdataref; /* subsystem proc-specific data */
251
252 int p_exitsig; /* l: signal to send to parent on exit */
253 int p_flag; /* p: PK_* flags */
254 int p_sflag; /* p: PS_* flags */
255 int p_stflag; /* t: PST_* flags */
256 short p_slflag; /* l, p: PSL_* flags */
257 char p_stat; /* l: S* process status. */
258 char p_lflag; /* l: PL_* flags */
259 char p_trace_enabled;/* p: cached by syscall_intern() */
260 char p_pad1[3]; /* unused */
261
262 pid_t p_pid; /* :: Process identifier. */
263 LIST_ENTRY(proc) p_pglist; /* l: List of processes in pgrp. */
264 struct proc *p_pptr; /* l: Pointer to parent process. */
265 LIST_ENTRY(proc) p_sibling; /* l: List of sibling processes. */
266 LIST_HEAD(, proc) p_children; /* l: List of children. */
267 LIST_HEAD(, lwp) p_lwps; /* p: List of LWPs. */
268 struct ras *p_raslist; /* a: List of RAS entries */
269
270/* The following fields are all zeroed upon creation in fork. */
271#define p_startzero p_nlwps
272
273 int p_nlwps; /* p: Number of LWPs */
274 int p_nzlwps; /* p: Number of zombie LWPs */
275 int p_nrlwps; /* p: Number running/sleeping LWPs */
276 int p_nlwpwait; /* p: Number of LWPs in lwp_wait1() */
277 int p_ndlwps; /* p: Number of detached LWPs */
278 u_int p_nstopchild; /* l: Count of stopped/dead children */
279 u_int p_waited; /* l: parent has waited on child */
280 struct lwp *p_zomblwp; /* p: detached LWP to be reaped */
281 struct lwp *p_vforklwp; /* p: parent LWP waiting at vfork() */
282
283 /* scheduling */
284 void *p_sched_info; /* p: Scheduler-specific structure */
285 fixpt_t p_estcpu; /* p: Time avg. value of p_cpticks */
286 fixpt_t p_estcpu_inherited; /* p: cpu inherited from children */
287 unsigned int p_forktime;
288 fixpt_t p_pctcpu; /* p: %cpu from dead LWPs */
289
290 struct proc *p_opptr; /* l: save parent during ptrace. */
291 struct ptimers *p_timers; /* Timers: real, virtual, profiling */
292 struct bintime p_rtime; /* p: real time */
293 u_quad_t p_uticks; /* t: Statclock hits in user mode */
294 u_quad_t p_sticks; /* t: Statclock hits in system mode */
295 u_quad_t p_iticks; /* t: Statclock hits processing intr */
296 uint64_t p_xutime; /* p: utime exposed to userspace */
297 uint64_t p_xstime; /* p: stime exposed to userspace */
298
299 int p_traceflag; /* k: Kernel trace points */
300 void *p_tracep; /* k: Trace private data */
301 struct vnode *p_textvp; /* :: Vnode of executable */
302
303 struct emul *p_emul; /* :: emulation information */
304 void *p_emuldata; /* :: per-proc emul data, or NULL */
305 const struct execsw *p_execsw; /* :: exec package information */
306 struct klist p_klist; /* p: knotes attached to proc */
307
308 LIST_HEAD(, lwp) p_sigwaiters; /* p: LWPs waiting for signals */
309 sigpend_t p_sigpend; /* p: pending signals */
310 struct lcproc *p_lwpctl; /* p, a: _lwp_ctl() information */
311 pid_t p_ppid; /* :: cached parent pid */
312 pid_t p_oppid; /* :: cached original parent pid */
313 char *p_path; /* :: full pathname of executable */
314
315/*
316 * End area that is zeroed on creation
317 */
318#define p_endzero p_startcopy
319
320/*
321 * The following fields are all copied upon creation in fork.
322 */
323#define p_startcopy p_sigctx
324
325 struct sigctx p_sigctx; /* p: Shared signal state */
326
327 u_char p_nice; /* p: Process "nice" value */
328 char p_comm[MAXCOMLEN+1];
329 /* p: basename of last exec file */
330 struct pgrp *p_pgrp; /* l: Pointer to process group */
331
332 vaddr_t p_psstrp; /* :: address of process's ps_strings */
333 u_int p_pax; /* :: PAX flags */
334 int p_xexit; /* p: exit code */
335/*
336 * End area that is copied on creation
337 */
338#define p_endcopy p_xsig
339 u_short p_xsig; /* p: stop signal */
340 u_short p_acflag; /* p: Acc. flags; see struct lwp also */
341 struct mdproc p_md; /* p: Any machine-dependent fields */
342 vaddr_t p_stackbase; /* :: ASLR randomized stack base */
343 struct kdtrace_proc *p_dtrace; /* :: DTrace-specific data. */
344/*
345 * Locks in their own cache line towards the end.
346 */
347 kmutex_t p_auxlock /* :: secondary, longer term lock */
348 __aligned(COHERENCY_UNIT);
349 kmutex_t p_stmutex; /* :: mutex on profiling state */
350 krwlock_t p_reflock; /* :: lock for debugger, procfs */
351};
352
353#define p_rlimit p_limit->pl_rlimit
354#define p_session p_pgrp->pg_session
355#define p_pgid p_pgrp->pg_id
356
357#endif /* _KMEMUSER || _KERNEL */
358
359/*
360 * Status values.
361 */
362#define SIDL 1 /* Process being created by fork */
363#define SACTIVE 2 /* Process is not stopped */
364#define SDYING 3 /* About to die */
365#define SSTOP 4 /* Process debugging or suspension */
366#define SZOMB 5 /* Awaiting collection by parent */
367#define SDEAD 6 /* Almost a zombie */
368
369#define P_ZOMBIE(p) \
370 ((p)->p_stat == SZOMB || (p)->p_stat == SDYING || (p)->p_stat == SDEAD)
371
372/*
373 * These flags are kept in p_flag and are protected by p_lock. Access from
374 * process context only.
375 */
376#define PK_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory lock */
377#define PK_SYSTEM 0x00000002 /* System process (kthread) */
378#define PK_SYSVSEM 0x00000004 /* Used SysV semaphores */
379#define PK_SUGID 0x00000100 /* Had set id privileges since last exec */
380#define PK_KMEM 0x00000200 /* Has kmem access */
381#define PK_EXEC 0x00004000 /* Process called exec */
382#define PK_NOCLDWAIT 0x00020000 /* No zombies if child dies */
383#define PK_32 0x00040000 /* 32-bit process (used on 64-bit kernels) */
384#define PK_CLDSIGIGN 0x00080000 /* Process is ignoring SIGCHLD */
385#define PK_MARKER 0x80000000 /* Is a dummy marker process */
386
387/*
388 * These flags are kept in p_sflag and are protected by p_lock. Access from
389 * process context only.
390 */
391#define PS_NOCLDSTOP 0x00000008 /* No SIGCHLD when children stop */
392#define PS_RUMP_LWPEXIT 0x00000400 /* LWPs in RUMP kernel should exit for GC */
393#define PS_WCORE 0x00001000 /* Process needs to dump core */
394#define PS_WEXIT 0x00002000 /* Working on exiting */
395#define PS_STOPFORK 0x00800000 /* Child will be stopped on fork(2) */
396#define PS_STOPEXEC 0x01000000 /* Will be stopped on exec(2) */
397#define PS_STOPEXIT 0x02000000 /* Will be stopped at process exit */
398#define PS_COREDUMP 0x20000000 /* Process core-dumped */
399#define PS_CONTINUED 0x40000000 /* Process is continued */
400#define PS_STOPPING 0x80000000 /* Transitioning SACTIVE -> SSTOP */
401
402/*
403 * These flags are kept in p_slflag and are protected by the proc_lock
404 * and p_lock. Access from process context only.
405 */
406#define PSL_TRACEFORK 0x00000001 /* traced process wants fork events */
407#define PSL_TRACEVFORK 0x00000002 /* traced process wants vfork events */
408#define PSL_TRACEVFORK_DONE \
409 0x00000004 /* traced process wants vfork done events */
410#define PSL_TRACELWP_CREATE \
411 0x00000008 /* traced process wants LWP create events */
412#define PSL_TRACELWP_EXIT \
413 0x00000010 /* traced process wants LWP exit events */
414#define PSL_TRACEPOSIX_SPAWN \
415 0x00000020 /* traced process wants posix_spawn events */
416
417#define PSL_TRACED 0x00000040 /* Debugged process being traced */
418#define PSL_TRACEDCHILD 0x00000080 /* Report process birth */
419#define PSL_CHTRACED 0x00000100 /* Child has been traced & reparented */
420#define PSL_SYSCALL 0x00000200 /* process has PT_SYSCALL enabled */
421#define PSL_SYSCALLEMU 0x00000400 /* cancel in-progress syscall */
422
423/*
424 * Kept in p_stflag and protected by p_stmutex.
425 */
426#define PST_PROFIL 0x00000020 /* Has started profiling */
427
428/*
429 * Kept in p_lflag and protected by the proc_lock. Access
430 * from process context only.
431 */
432#define PL_CONTROLT 0x00000001 /* Has a controlling terminal */
433#define PL_PPWAIT 0x00000002 /* Parent is waiting for child exec/exit */
434#define PL_SIGCOMPAT 0x00000004 /* Has used compat signal trampoline */
435#define PL_ORPHANPG 0x00000008 /* Member of an orphaned pgrp */
436
437#if defined(_KMEMUSER) || defined(_KERNEL)
438
439/*
440 * Macro to compute the exit signal to be delivered.
441 */
442#define P_EXITSIG(p) \
443 (((p)->p_slflag & PSL_TRACED) ? SIGCHLD : p->p_exitsig)
444/*
445 * Compute a wait(2) 16 bit exit status code
446 */
447#define P_WAITSTATUS(p) W_EXITCODE((p)->p_xexit, ((p)->p_xsig | \
448 (((p)->p_sflag & PS_COREDUMP) ? WCOREFLAG : 0)))
449
450LIST_HEAD(proclist, proc); /* A list of processes */
451
452/*
453 * This structure associates a proclist with its lock.
454 */
455struct proclist_desc {
456 struct proclist *pd_list; /* The list */
457 /*
458 * XXX Add a pointer to the proclist's lock eventually.
459 */
460};
461
462#ifdef _KERNEL
463
464/*
465 * We use process IDs <= PID_MAX until there are > 16k processes.
466 * NO_PGID is used to represent "no process group" for a tty.
467 */
468#define PID_MAX 30000
469#define NO_PGID ((pid_t)-1)
470
471#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
472
473/*
474 * Flags passed to fork1().
475 */
476#define FORK_PPWAIT 0x0001 /* Block parent until child exit */
477#define FORK_SHAREVM 0x0002 /* Share vmspace with parent */
478#define FORK_SHARECWD 0x0004 /* Share cdir/rdir/cmask */
479#define FORK_SHAREFILES 0x0008 /* Share file descriptors */
480#define FORK_SHARESIGS 0x0010 /* Share signal actions */
481#define FORK_NOWAIT 0x0020 /* Make init the parent of the child */
482#define FORK_CLEANFILES 0x0040 /* Start with a clean descriptor set */
483#define FORK_SYSTEM 0x0080 /* Fork a kernel thread */
484
485extern struct proc proc0; /* Process slot for swapper */
486extern u_int nprocs; /* Current number of procs */
487extern int maxproc; /* Max number of procs */
488#define vmspace_kernel() (proc0.p_vmspace)
489
490extern kmutex_t proc_lock;
491extern struct proclist allproc; /* List of all processes */
492extern struct proclist zombproc; /* List of zombie processes */
493
494extern struct proc *initproc; /* Process slots for init, pager */
495
496extern const struct proclist_desc proclists[];
497
498int proc_find_locked(struct lwp *, struct proc **, pid_t);
499proc_t * proc_find_raw(pid_t);
500proc_t * proc_find(pid_t); /* Find process by ID */
501proc_t * proc_find_lwpid(pid_t); /* Find process by LWP ID */
502struct lwp * proc_find_lwp(proc_t *, pid_t); /* Find LWP in proc by ID */
503struct lwp * proc_find_lwp_unlocked(proc_t *, pid_t);
504 /* Find LWP, acquire proc */
505struct lwp * proc_find_lwp_acquire_proc(pid_t, proc_t **);
506struct pgrp * pgrp_find(pid_t); /* Find process group by ID */
507
508void procinit(void);
509void procinit_sysctl(void);
510int proc_enterpgrp(struct proc *, pid_t, pid_t, bool);
511void proc_leavepgrp(struct proc *);
512void proc_sesshold(struct session *);
513void proc_sessrele(struct session *);
514void fixjobc(struct proc *, struct pgrp *, int);
515
516int tsleep(wchan_t, pri_t, const char *, int);
517int mtsleep(wchan_t, pri_t, const char *, int, kmutex_t *);
518void wakeup(wchan_t);
519int kpause(const char *, bool, int, kmutex_t *);
520void exit1(struct lwp *, int, int) __dead;
521int kill1(struct lwp *l, pid_t pid, ksiginfo_t *ksi, register_t *retval);
522int do_sys_wait(int *, int *, int, struct rusage *);
523int do_sys_waitid(idtype_t, id_t, int *, int *, int, struct wrusage *,
524 siginfo_t *);
525
526struct proc *proc_alloc(void);
527void proc0_init(void);
528pid_t proc_alloc_pid(struct proc *);
529void proc_free_pid(pid_t);
530pid_t proc_alloc_lwpid(struct proc *, struct lwp *);
531void proc_free_lwpid(struct proc *, pid_t);
532void proc_free_mem(struct proc *);
533void exit_lwps(struct lwp *l);
534int fork1(struct lwp *, int, int, void *, size_t,
535 void (*)(void *), void *, register_t *);
536int pgid_in_session(struct proc *, pid_t);
537void cpu_lwp_fork(struct lwp *, struct lwp *, void *, size_t,
538 void (*)(void *), void *);
539void cpu_lwp_free(struct lwp *, int);
540void cpu_lwp_free2(struct lwp *);
541void cpu_spawn_return(struct lwp*);
542
543#ifdef __HAVE_SYSCALL_INTERN
544void syscall_intern(struct proc *);
545#endif
546
547void md_child_return(struct lwp *);
548void child_return(void *);
549
550int proc_isunder(struct proc *, struct lwp *);
551int proc_uidmatch(kauth_cred_t, kauth_cred_t);
552
553int proc_vmspace_getref(struct proc *, struct vmspace **);
554void proc_crmod_leave(kauth_cred_t, kauth_cred_t, bool);
555void proc_crmod_enter(void);
556int proc_getauxv(struct proc *, void **, size_t *);
557
558int proc_specific_key_create(specificdata_key_t *, specificdata_dtor_t);
559void proc_specific_key_delete(specificdata_key_t);
560void proc_initspecific(struct proc *);
561void proc_finispecific(struct proc *);
562void * proc_getspecific(struct proc *, specificdata_key_t);
563void proc_setspecific(struct proc *, specificdata_key_t, void *);
564int proc_compare(const struct proc *, const struct lwp *,
565 const struct proc *, const struct lwp *);
566
567/*
568 * Special handlers for delivering EVFILT_PROC notifications. These
569 * exist to handle some of the special locking considerations around
570 * processes.
571 */
572void knote_proc_exec(struct proc *);
573void knote_proc_fork(struct proc *, struct proc *);
574void knote_proc_exit(struct proc *);
575
576int proclist_foreach_call(struct proclist *,
577 int (*)(struct proc *, void *arg), void *);
578
579static __inline struct proc *
580_proclist_skipmarker(struct proc *p0)
581{
582 struct proc *p = p0;
583
584 while (p != NULL && p->p_flag & PK_MARKER)
585 p = LIST_NEXT(p, p_list);
586
587 return p;
588}
589
590#define PROC_PTRSZ(p) (((p)->p_flag & PK_32) ? sizeof(int) : sizeof(void *))
591#define PROC_REGSZ(p) (((p)->p_flag & PK_32) ? \
592 sizeof(process_reg32) : sizeof(struct reg))
593#define PROC_FPREGSZ(p) (((p)->p_flag & PK_32) ? \
594 sizeof(process_fpreg32) : sizeof(struct fpreg))
595#define PROC_DBREGSZ(p) (((p)->p_flag & PK_32) ? \
596 sizeof(process_dbreg32) : sizeof(struct dbreg))
597
598#ifndef PROC_MACHINE_ARCH
599#define PROC_MACHINE_ARCH(p) machine_arch
600#endif
601
602/*
603 * PROCLIST_FOREACH: iterate on the given proclist, skipping PK_MARKER ones.
604 */
605#define PROCLIST_FOREACH(var, head) \
606 for ((var) = LIST_FIRST(head); \
607 ((var) = _proclist_skipmarker(var)) != NULL; \
608 (var) = LIST_NEXT(var, p_list))
609
610#ifdef KSTACK_CHECK_MAGIC
611void kstack_setup_magic(const struct lwp *);
612void kstack_check_magic(const struct lwp *);
613#else
614#define kstack_setup_magic(x)
615#define kstack_check_magic(x)
616#endif
617
618extern struct emul emul_netbsd;
619
620#endif /* _KERNEL */
621
622/*
623 * Kernel stack parameters.
624 *
625 * KSTACK_LOWEST_ADDR: return the lowest address of the LWP's kernel stack,
626 * excluding red-zone.
627 *
628 * KSTACK_SIZE: the size kernel stack for a LWP, excluding red-zone.
629 *
630 * if <machine/proc.h> provides the MD definition, it will be used.
631 */
632#ifndef KSTACK_LOWEST_ADDR
633#define KSTACK_LOWEST_ADDR(l) ((void *)ALIGN((struct pcb *)((l)->l_addr) + 1))
634#endif
635#ifndef KSTACK_SIZE
636#define KSTACK_SIZE (USPACE - ALIGN(sizeof(struct pcb)))
637#endif
638
639#endif /* _KMEMUSER || _KERNEL */
640
641#endif /* !_SYS_PROC_H_ */