FreeBSD/Linux Kernel Cross Reference
sys/sys/proc.h
1 /* $NetBSD: proc.h,v 1.370 2022/05/09 13:27:24 wiz Exp $ */
2
3 /*-
4 * Copyright (c) 2006, 2007, 2008, 2020 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 #ifndef _KERNEL
97 #include <sys/time.h>
98 #include <sys/resource.h>
99 #endif
100
101 /*
102 * One structure allocated per session.
103 */
104 struct session {
105 int s_count; /* Ref cnt; pgrps in session */
106 u_int s_flags;
107 #define S_LOGIN_SET 1 /* s_login set in this session */
108 struct proc *s_leader; /* Session leader */
109 struct vnode *s_ttyvp; /* Vnode of controlling terminal */
110 struct tty *s_ttyp; /* Controlling terminal */
111 char s_login[MAXLOGNAME]; /* Setlogin() name */
112 pid_t s_sid; /* Session ID (pid of leader) */
113 };
114
115 /*
116 * One structure allocated per process group.
117 */
118 struct pgrp {
119 LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members */
120 struct session *pg_session; /* Pointer to session */
121 pid_t pg_id; /* Pgrp id */
122 int pg_jobc; /*
123 * Number of processes qualifying
124 * pgrp for job control
125 */
126 };
127
128 /*
129 * Autoloadable syscall definition
130 */
131 struct sc_autoload {
132 u_int al_code;
133 const char *al_module;
134 };
135
136 /*
137 * One structure allocated per emulation.
138 */
139 struct exec_package;
140 struct ras;
141 struct kauth_cred;
142
143 struct emul {
144 const char *e_name; /* Symbolic name */
145 const char *e_path; /* Extra emulation path (NULL if none)*/
146 #ifndef __HAVE_MINIMAL_EMUL
147 int e_flags; /* Miscellaneous flags, see above */
148 /* Syscall handling function */
149 const int *e_errno; /* Errno array */
150 int e_nosys; /* Offset of the nosys() syscall */
151 int e_nsysent; /* Number of system call entries */
152 #endif
153 struct sysent *e_sysent; /* System call array */
154 const uint32_t *e_nomodbits; /* sys_nosys/sys_nomodule flags
155 * for syscall_disestablish() */
156 const char * const *e_syscallnames; /* System call name array */
157 struct sc_autoload *e_sc_autoload; /* List of autoloadable syscalls */
158 /* Signal sending function */
159 void (*e_sendsig)(const struct ksiginfo *,
160 const sigset_t *);
161 void (*e_trapsignal)(struct lwp *, struct ksiginfo *);
162 char *e_sigcode; /* Start of sigcode */
163 char *e_esigcode; /* End of sigcode */
164 /* Set registers before execution */
165 struct uvm_object **e_sigobject;/* shared sigcode object */
166 void (*e_setregs)(struct lwp *, struct exec_package *,
167 vaddr_t);
168
169 /* Per-process hooks */
170 void (*e_proc_exec)(struct proc *, struct exec_package *);
171 void (*e_proc_fork)(struct proc *, struct lwp *, int);
172 void (*e_proc_exit)(struct proc *);
173 void (*e_lwp_fork)(struct lwp *, struct lwp *);
174 void (*e_lwp_exit)(struct lwp *);
175
176 #ifdef __HAVE_SYSCALL_INTERN
177 void (*e_syscall_intern)(struct proc *);
178 #else
179 void (*e_syscall)(void);
180 #endif
181 /* Emulation specific sysctl data */
182 struct sysctlnode *e_sysctlovly;
183
184 vaddr_t (*e_vm_default_addr)(struct proc *, vaddr_t, vsize_t,
185 int);
186
187 /* Emulation-specific hook for userspace page faults */
188 int (*e_usertrap)(struct lwp *, vaddr_t, void *);
189
190 size_t e_ucsize; /* size of ucontext_t */
191 void (*e_startlwp)(void *);
192
193 /* Dtrace syscall probe */
194 void (*e_dtrace_syscall)(uint32_t, register_t,
195 const struct sysent *, const void *,
196 const register_t *, int);
197
198 /* Emulation specific support for ktracing signal posts */
199 void (*e_ktrpsig)(int, sig_t, const sigset_t *,
200 const struct ksiginfo *);
201 };
202
203 /*
204 * Emulation miscellaneous flags
205 */
206 #define EMUL_HAS_SYS___syscall 0x001 /* Has SYS___syscall */
207
208 /*
209 * Description of a process.
210 *
211 * This structure contains the information needed to manage a thread of
212 * control, known in UN*X as a process; it has references to substructures
213 * containing descriptions of things that the process uses, but may share
214 * with related processes. The process structure and the substructures
215 * are always addressible except for those marked "(PROC ONLY)" below,
216 * which might be addressible only on a processor on which the process
217 * is running.
218 *
219 * Field markings and the corresponding locks:
220 *
221 * a: p_auxlock
222 * k: ktrace_mutex
223 * l: proc_lock
224 * t: p_stmutex
225 * p: p_lock
226 * (: updated atomically
227 * :: unlocked, stable
228 */
229 struct vmspace;
230
231 struct proc {
232 LIST_ENTRY(proc) p_list; /* l: List of all processes */
233 kmutex_t *p_lock; /* :: general mutex */
234 kcondvar_t p_waitcv; /* p: wait, stop CV on children */
235 kcondvar_t p_lwpcv; /* p: wait, stop CV on LWPs */
236
237 /* Substructures: */
238 struct kauth_cred *p_cred; /* p: Master copy of credentials */
239 struct filedesc *p_fd; /* :: Ptr to open files structure */
240 struct cwdinfo *p_cwdi; /* :: cdir/rdir/cmask info */
241 struct pstats *p_stats; /* :: Accounting/stats (PROC ONLY) */
242 struct plimit *p_limit; /* :: Process limits */
243 struct vmspace *p_vmspace; /* :: Address space */
244 struct sigacts *p_sigacts; /* :: Process sigactions */
245 struct aioproc *p_aio; /* p: Asynchronous I/O data */
246 u_int p_mqueue_cnt; /* (: Count of open message queues */
247 specificdata_reference
248 p_specdataref; /* subsystem proc-specific data */
249
250 int p_exitsig; /* l: signal to send to parent on exit */
251 int p_flag; /* p: PK_* flags */
252 int p_sflag; /* p: PS_* flags */
253 int p_slflag; /* p, l: PSL_* flags */
254 int p_lflag; /* l: PL_* flags */
255 int p_stflag; /* t: PST_* flags */
256 char p_stat; /* p: S* process status. */
257 char p_trace_enabled;/* p: cached by syscall_intern() */
258 char p_pad1[2]; /* unused */
259
260 pid_t p_pid; /* :: Process identifier. */
261 LIST_ENTRY(proc) p_pglist; /* l: List of processes in pgrp. */
262 struct proc *p_pptr; /* l: Pointer to parent process. */
263 LIST_ENTRY(proc) p_sibling; /* l: List of sibling processes. */
264 LIST_HEAD(, proc) p_children; /* l: List of children. */
265 LIST_HEAD(, lwp) p_lwps; /* p: List of LWPs. */
266 struct ras *p_raslist; /* a: List of RAS entries */
267
268 /* The following fields are all zeroed upon creation in fork. */
269 #define p_startzero p_nlwps
270
271 int p_nlwps; /* p: Number of LWPs */
272 int p_nzlwps; /* p: Number of zombie LWPs */
273 int p_nrlwps; /* p: Number running/sleeping LWPs */
274 int p_nlwpwait; /* p: Number of LWPs in lwp_wait1() */
275 int p_ndlwps; /* p: Number of detached LWPs */
276 u_int p_nstopchild; /* l: Count of stopped/dead children */
277 u_int p_waited; /* l: parent has waited on child */
278 struct lwp *p_zomblwp; /* p: detached LWP to be reaped */
279 struct lwp *p_vforklwp; /* p: parent LWP waiting at vfork() */
280
281 /* scheduling */
282 void *p_sched_info; /* p: Scheduler-specific structure */
283 fixpt_t p_estcpu; /* p: Time avg. value of p_cpticks */
284 fixpt_t p_estcpu_inherited; /* p: cpu inherited from children */
285 unsigned int p_forktime;
286 fixpt_t p_pctcpu; /* p: %cpu from dead LWPs */
287
288 struct proc *p_opptr; /* l: save parent during ptrace. */
289 struct ptimers *p_timers; /* Timers: real, virtual, profiling */
290 struct bintime p_rtime; /* p: real time */
291 u_quad_t p_uticks; /* t: Statclock hits in user mode */
292 u_quad_t p_sticks; /* t: Statclock hits in system mode */
293 u_quad_t p_iticks; /* t: Statclock hits processing intr */
294 uint64_t p_xutime; /* p: utime exposed to userspace */
295 uint64_t p_xstime; /* p: stime exposed to userspace */
296
297 int p_traceflag; /* k: Kernel trace points */
298 void *p_tracep; /* k: Trace private data */
299 struct vnode *p_textvp; /* :: Vnode of executable */
300
301 struct emul *p_emul; /* :: emulation information */
302 void *p_emuldata; /* :: per-proc emul data, or NULL */
303 const struct execsw *p_execsw; /* :: exec package information */
304 struct klist p_klist; /* p: knotes attached to proc */
305
306 LIST_HEAD(, lwp) p_sigwaiters; /* p: LWPs waiting for signals */
307 sigpend_t p_sigpend; /* p: pending signals */
308 struct lcproc *p_lwpctl; /* p, a: _lwp_ctl() information */
309 pid_t p_ppid; /* :: cached parent pid */
310 pid_t p_oppid; /* :: cached original parent pid */
311 char *p_path; /* :: full pathname of executable */
312
313 /*
314 * End area that is zeroed on creation
315 */
316 #define p_endzero p_startcopy
317
318 /*
319 * The following fields are all copied upon creation in fork.
320 */
321 #define p_startcopy p_sigctx
322
323 struct sigctx p_sigctx; /* p: Shared signal state */
324
325 u_char p_nice; /* p: Process "nice" value */
326 char p_comm[MAXCOMLEN+1];
327 /* p: basename of last exec file */
328 struct pgrp *p_pgrp; /* l: Pointer to process group */
329
330 vaddr_t p_psstrp; /* :: address of process's ps_strings */
331 u_int p_pax; /* :: PAX flags */
332 int p_xexit; /* p: exit code */
333 /*
334 * End area that is copied on creation
335 */
336 #define p_endcopy p_xsig
337 u_short p_xsig; /* p: stop signal */
338 u_short p_acflag; /* p: Acc. flags; see struct lwp also */
339 struct mdproc p_md; /* p: Any machine-dependent fields */
340 vaddr_t p_stackbase; /* :: ASLR randomized stack base */
341 struct kdtrace_proc *p_dtrace; /* :: DTrace-specific data. */
342 /*
343 * Locks in their own cache line towards the end.
344 */
345 kmutex_t p_auxlock /* :: secondary, longer term lock */
346 __aligned(COHERENCY_UNIT);
347 kmutex_t p_stmutex; /* :: mutex on profiling state */
348 krwlock_t p_reflock; /* :: lock for debugger, procfs */
349 };
350
351 #define p_rlimit p_limit->pl_rlimit
352 #define p_session p_pgrp->pg_session
353 #define p_pgid p_pgrp->pg_id
354
355 #endif /* _KMEMUSER || _KERNEL */
356
357 /*
358 * Status values.
359 */
360 #define SIDL 1 /* Process being created by fork */
361 #define SACTIVE 2 /* Process is not stopped */
362 #define SDYING 3 /* About to die */
363 #define SSTOP 4 /* Process debugging or suspension */
364 #define SZOMB 5 /* Awaiting collection by parent */
365 #define SDEAD 6 /* Almost a zombie */
366
367 #define P_ZOMBIE(p) \
368 ((p)->p_stat == SZOMB || (p)->p_stat == SDYING || (p)->p_stat == SDEAD)
369
370 /*
371 * These flags are kept in p_flag and are protected by p_lock. Access from
372 * process context only.
373 */
374 #define PK_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory lock */
375 #define PK_SYSTEM 0x00000002 /* System process (kthread) */
376 #define PK_SYSVSEM 0x00000004 /* Used SysV semaphores */
377 #define PK_SUGID 0x00000100 /* Had set id privileges since last exec */
378 #define PK_KMEM 0x00000200 /* Has kmem access */
379 #define PK_EXEC 0x00004000 /* Process called exec */
380 #define PK_NOCLDWAIT 0x00020000 /* No zombies if child dies */
381 #define PK_32 0x00040000 /* 32-bit process (used on 64-bit kernels) */
382 #define PK_CLDSIGIGN 0x00080000 /* Process is ignoring SIGCHLD */
383 #define PK_MARKER 0x80000000 /* Is a dummy marker process */
384
385 /*
386 * These flags are kept in p_sflag and are protected by p_lock. Access from
387 * process context only.
388 */
389 #define PS_NOCLDSTOP 0x00000008 /* No SIGCHLD when children stop */
390 #define PS_RUMP_LWPEXIT 0x00000400 /* LWPs in RUMP kernel should exit for GC */
391 #define PS_WCORE 0x00001000 /* Process needs to dump core */
392 #define PS_WEXIT 0x00002000 /* Working on exiting */
393 #define PS_STOPFORK 0x00800000 /* Child will be stopped on fork(2) */
394 #define PS_STOPEXEC 0x01000000 /* Will be stopped on exec(2) */
395 #define PS_STOPEXIT 0x02000000 /* Will be stopped at process exit */
396 #define PS_COREDUMP 0x20000000 /* Process core-dumped */
397 #define PS_CONTINUED 0x40000000 /* Process is continued */
398 #define PS_STOPPING 0x80000000 /* Transitioning SACTIVE -> SSTOP */
399
400 /*
401 * These flags are kept in p_slflag and are protected by the proc_lock
402 * and p_lock. Access from process context only.
403 */
404 #define PSL_TRACEFORK 0x00000001 /* traced process wants fork events */
405 #define PSL_TRACEVFORK 0x00000002 /* traced process wants vfork events */
406 #define PSL_TRACEVFORK_DONE \
407 0x00000004 /* traced process wants vfork done events */
408 #define PSL_TRACELWP_CREATE \
409 0x00000008 /* traced process wants LWP create events */
410 #define PSL_TRACELWP_EXIT \
411 0x00000010 /* traced process wants LWP exit events */
412 #define PSL_TRACEPOSIX_SPAWN \
413 0x00000020 /* traced process wants posix_spawn events */
414
415 #define PSL_TRACED 0x00000800 /* Debugged process being traced */
416 #define PSL_TRACEDCHILD 0x00001000 /* Report process birth */
417 #define PSL_CHTRACED 0x00400000 /* Child has been traced & reparented */
418 #define PSL_SYSCALL 0x04000000 /* process has PT_SYSCALL enabled */
419 #define PSL_SYSCALLEMU 0x08000000 /* cancel in-progress syscall */
420
421 /*
422 * Kept in p_stflag and protected by p_stmutex.
423 */
424 #define PST_PROFIL 0x00000020 /* Has started profiling */
425
426 /*
427 * Kept in p_lflag and protected by the proc_lock. Access
428 * from process context only.
429 */
430 #define PL_CONTROLT 0x00000002 /* Has a controlling terminal */
431 #define PL_PPWAIT 0x00000010 /* Parent is waiting for child exec/exit */
432 #define PL_SIGCOMPAT 0x00000200 /* Has used compat signal trampoline */
433 #define PL_ORPHANPG 0x20000000 /* Member of an orphaned pgrp */
434
435 #if defined(_KMEMUSER) || defined(_KERNEL)
436
437 /*
438 * Macro to compute the exit signal to be delivered.
439 */
440 #define P_EXITSIG(p) \
441 (((p)->p_slflag & PSL_TRACED) ? SIGCHLD : p->p_exitsig)
442 /*
443 * Compute a wait(2) 16 bit exit status code
444 */
445 #define P_WAITSTATUS(p) W_EXITCODE((p)->p_xexit, ((p)->p_xsig | \
446 (((p)->p_sflag & PS_COREDUMP) ? WCOREFLAG : 0)))
447
448 LIST_HEAD(proclist, proc); /* A list of processes */
449
450 /*
451 * This structure associates a proclist with its lock.
452 */
453 struct proclist_desc {
454 struct proclist *pd_list; /* The list */
455 /*
456 * XXX Add a pointer to the proclist's lock eventually.
457 */
458 };
459
460 #ifdef _KERNEL
461
462 /*
463 * We use process IDs <= PID_MAX until there are > 16k processes.
464 * NO_PGID is used to represent "no process group" for a tty.
465 */
466 #define PID_MAX 30000
467 #define NO_PGID ((pid_t)-1)
468
469 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
470
471 /*
472 * Flags passed to fork1().
473 */
474 #define FORK_PPWAIT 0x0001 /* Block parent until child exit */
475 #define FORK_SHAREVM 0x0002 /* Share vmspace with parent */
476 #define FORK_SHARECWD 0x0004 /* Share cdir/rdir/cmask */
477 #define FORK_SHAREFILES 0x0008 /* Share file descriptors */
478 #define FORK_SHARESIGS 0x0010 /* Share signal actions */
479 #define FORK_NOWAIT 0x0020 /* Make init the parent of the child */
480 #define FORK_CLEANFILES 0x0040 /* Start with a clean descriptor set */
481 #define FORK_SYSTEM 0x0080 /* Fork a kernel thread */
482
483 extern struct proc proc0; /* Process slot for swapper */
484 extern u_int nprocs; /* Current number of procs */
485 extern int maxproc; /* Max number of procs */
486 #define vmspace_kernel() (proc0.p_vmspace)
487
488 extern kmutex_t proc_lock;
489 extern struct proclist allproc; /* List of all processes */
490 extern struct proclist zombproc; /* List of zombie processes */
491
492 extern struct proc *initproc; /* Process slots for init, pager */
493
494 extern const struct proclist_desc proclists[];
495
496 int proc_find_locked(struct lwp *, struct proc **, pid_t);
497 proc_t * proc_find_raw(pid_t);
498 proc_t * proc_find(pid_t); /* Find process by ID */
499 proc_t * proc_find_lwpid(pid_t); /* Find process by LWP ID */
500 struct lwp * proc_find_lwp(proc_t *, pid_t); /* Find LWP in proc by ID */
501 struct lwp * proc_find_lwp_unlocked(proc_t *, pid_t);
502 /* Find LWP, acquire proc */
503 struct lwp * proc_find_lwp_acquire_proc(pid_t, proc_t **);
504 struct pgrp * pgrp_find(pid_t); /* Find process group by ID */
505
506 void procinit(void);
507 void procinit_sysctl(void);
508 int proc_enterpgrp(struct proc *, pid_t, pid_t, bool);
509 void proc_leavepgrp(struct proc *);
510 void proc_sesshold(struct session *);
511 void proc_sessrele(struct session *);
512 void fixjobc(struct proc *, struct pgrp *, int);
513
514 int tsleep(wchan_t, pri_t, const char *, int);
515 int mtsleep(wchan_t, pri_t, const char *, int, kmutex_t *);
516 void wakeup(wchan_t);
517 int kpause(const char *, bool, int, kmutex_t *);
518 void exit1(struct lwp *, int, int) __dead;
519 int kill1(struct lwp *l, pid_t pid, ksiginfo_t *ksi, register_t *retval);
520 int do_sys_wait(int *, int *, int, struct rusage *);
521 int do_sys_waitid(idtype_t, id_t, int *, int *, int, struct wrusage *,
522 siginfo_t *);
523
524 struct proc *proc_alloc(void);
525 void proc0_init(void);
526 pid_t proc_alloc_pid(struct proc *);
527 void proc_free_pid(pid_t);
528 pid_t proc_alloc_lwpid(struct proc *, struct lwp *);
529 void proc_free_lwpid(struct proc *, pid_t);
530 void proc_free_mem(struct proc *);
531 void exit_lwps(struct lwp *l);
532 int fork1(struct lwp *, int, int, void *, size_t,
533 void (*)(void *), void *, register_t *);
534 int pgid_in_session(struct proc *, pid_t);
535 void cpu_lwp_fork(struct lwp *, struct lwp *, void *, size_t,
536 void (*)(void *), void *);
537 void cpu_lwp_free(struct lwp *, int);
538 void cpu_lwp_free2(struct lwp *);
539 void cpu_spawn_return(struct lwp*);
540
541 #ifdef __HAVE_SYSCALL_INTERN
542 void syscall_intern(struct proc *);
543 #endif
544
545 void md_child_return(struct lwp *);
546 void child_return(void *);
547
548 int proc_isunder(struct proc *, struct lwp *);
549 int proc_uidmatch(kauth_cred_t, kauth_cred_t);
550
551 int proc_vmspace_getref(struct proc *, struct vmspace **);
552 void proc_crmod_leave(kauth_cred_t, kauth_cred_t, bool);
553 void proc_crmod_enter(void);
554 int proc_getauxv(struct proc *, void **, size_t *);
555
556 int proc_specific_key_create(specificdata_key_t *, specificdata_dtor_t);
557 void proc_specific_key_delete(specificdata_key_t);
558 void proc_initspecific(struct proc *);
559 void proc_finispecific(struct proc *);
560 void * proc_getspecific(struct proc *, specificdata_key_t);
561 void proc_setspecific(struct proc *, specificdata_key_t, void *);
562 int proc_compare(const struct proc *, const struct lwp *,
563 const struct proc *, const struct lwp *);
564
565 /*
566 * Special handlers for delivering EVFILT_PROC notifications. These
567 * exist to handle some of the special locking considerations around
568 * processes.
569 */
570 void knote_proc_exec(struct proc *);
571 void knote_proc_fork(struct proc *, struct proc *);
572 void knote_proc_exit(struct proc *);
573
574 int proclist_foreach_call(struct proclist *,
575 int (*)(struct proc *, void *arg), void *);
576
577 static __inline struct proc *
578 _proclist_skipmarker(struct proc *p0)
579 {
580 struct proc *p = p0;
581
582 while (p != NULL && p->p_flag & PK_MARKER)
583 p = LIST_NEXT(p, p_list);
584
585 return p;
586 }
587
588 #define PROC_PTRSZ(p) (((p)->p_flag & PK_32) ? sizeof(int) : sizeof(void *))
589 #define PROC_REGSZ(p) (((p)->p_flag & PK_32) ? \
590 sizeof(process_reg32) : sizeof(struct reg))
591 #define PROC_FPREGSZ(p) (((p)->p_flag & PK_32) ? \
592 sizeof(process_fpreg32) : sizeof(struct fpreg))
593 #define PROC_DBREGSZ(p) (((p)->p_flag & PK_32) ? \
594 sizeof(process_dbreg32) : sizeof(struct dbreg))
595
596 /*
597 * PROCLIST_FOREACH: iterate on the given proclist, skipping PK_MARKER ones.
598 */
599 #define PROCLIST_FOREACH(var, head) \
600 for ((var) = LIST_FIRST(head); \
601 ((var) = _proclist_skipmarker(var)) != NULL; \
602 (var) = LIST_NEXT(var, p_list))
603
604 #ifdef KSTACK_CHECK_MAGIC
605 void kstack_setup_magic(const struct lwp *);
606 void kstack_check_magic(const struct lwp *);
607 #else
608 #define kstack_setup_magic(x)
609 #define kstack_check_magic(x)
610 #endif
611
612 extern struct emul emul_netbsd;
613
614 #endif /* _KERNEL */
615
616 /*
617 * Kernel stack parameters.
618 *
619 * KSTACK_LOWEST_ADDR: return the lowest address of the LWP's kernel stack,
620 * excluding red-zone.
621 *
622 * KSTACK_SIZE: the size kernel stack for a LWP, excluding red-zone.
623 *
624 * if <machine/proc.h> provides the MD definition, it will be used.
625 */
626 #ifndef KSTACK_LOWEST_ADDR
627 #define KSTACK_LOWEST_ADDR(l) ((void *)ALIGN((struct pcb *)((l)->l_addr) + 1))
628 #endif
629 #ifndef KSTACK_SIZE
630 #define KSTACK_SIZE (USPACE - ALIGN(sizeof(struct pcb)))
631 #endif
632
633 #endif /* _KMEMUSER || _KERNEL */
634
635 #endif /* !_SYS_PROC_H_ */
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