1 /* $NetBSD: proc.h,v 1.323 2015/09/24 14:33:31 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2006, 2007, 2008 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/rwlock.h>
85 #include <sys/mqueue.h>
86 #include <sys/mutex.h>
87 #include <sys/condvar.h>
88 #include <sys/queue.h>
89 #include <sys/signalvar.h>
90 #include <sys/siginfo.h>
91 #include <sys/event.h>
92 #include <sys/specificdata.h>
93
94 #ifndef _KERNEL
95 #include <sys/time.h>
96 #include <sys/resource.h>
97 #endif
98
99 /*
100 * One structure allocated per session.
101 */
102 struct session {
103 int s_count; /* Ref cnt; pgrps in session */
104 u_int s_flags;
105 #define S_LOGIN_SET 1 /* s_login set in this session */
106 struct proc *s_leader; /* Session leader */
107 struct vnode *s_ttyvp; /* Vnode of controlling terminal */
108 struct tty *s_ttyp; /* Controlling terminal */
109 char s_login[MAXLOGNAME]; /* Setlogin() name */
110 pid_t s_sid; /* Session ID (pid of leader) */
111 };
112
113 /*
114 * One structure allocated per process group.
115 */
116 struct pgrp {
117 LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members */
118 struct session *pg_session; /* Pointer to session */
119 pid_t pg_id; /* Pgrp id */
120 int pg_jobc; /*
121 * Number of processes qualifying
122 * pgrp for job control
123 */
124 };
125
126 /*
127 * One structure allocated per emulation.
128 */
129 struct exec_package;
130 struct ras;
131 struct kauth_cred;
132
133 struct emul {
134 const char *e_name; /* Symbolic name */
135 const char *e_path; /* Extra emulation path (NULL if none)*/
136 #ifndef __HAVE_MINIMAL_EMUL
137 int e_flags; /* Miscellaneous flags, see above */
138 /* Syscall handling function */
139 const int *e_errno; /* Errno array */
140 int e_nosys; /* Offset of the nosys() syscall */
141 int e_nsysent; /* Number of system call entries */
142 #endif
143 struct sysent *e_sysent; /* System call array */
144 const char * const *e_syscallnames; /* System call name array */
145 /* Signal sending function */
146 void (*e_sendsig)(const struct ksiginfo *,
147 const sigset_t *);
148 void (*e_trapsignal)(struct lwp *, struct ksiginfo *);
149 int (*e_tracesig)(struct proc *, int);
150 char *e_sigcode; /* Start of sigcode */
151 char *e_esigcode; /* End of sigcode */
152 /* Set registers before execution */
153 struct uvm_object **e_sigobject;/* shared sigcode object */
154 void (*e_setregs)(struct lwp *, struct exec_package *,
155 vaddr_t);
156
157 /* Per-process hooks */
158 void (*e_proc_exec)(struct proc *, struct exec_package *);
159 void (*e_proc_fork)(struct proc *, struct lwp *, int);
160 void (*e_proc_exit)(struct proc *);
161 void (*e_lwp_fork)(struct lwp *, struct lwp *);
162 void (*e_lwp_exit)(struct lwp *);
163
164 #ifdef __HAVE_SYSCALL_INTERN
165 void (*e_syscall_intern)(struct proc *);
166 #else
167 void (*e_syscall)(void);
168 #endif
169 /* Emulation specific sysctl data */
170 struct sysctlnode *e_sysctlovly;
171 int (*e_fault)(struct proc *, vaddr_t, int);
172
173 vaddr_t (*e_vm_default_addr)(struct proc *, vaddr_t, vsize_t);
174
175 /* Emulation-specific hook for userspace page faults */
176 int (*e_usertrap)(struct lwp *, vaddr_t, void *);
177
178 size_t e_ucsize; /* size of ucontext_t */
179 void (*e_startlwp)(void *);
180
181 /* Dtrace syscall probe */
182 void (*e_dtrace_syscall)(uint32_t, register_t,
183 const struct sysent *, const void *,
184 const register_t *, int);
185 };
186
187 /*
188 * Emulation miscelaneous flags
189 */
190 #define EMUL_HAS_SYS___syscall 0x001 /* Has SYS___syscall */
191
192 /*
193 * Description of a process.
194 *
195 * This structure contains the information needed to manage a thread of
196 * control, known in UN*X as a process; it has references to substructures
197 * containing descriptions of things that the process uses, but may share
198 * with related processes. The process structure and the substructures
199 * are always addressible except for those marked "(PROC ONLY)" below,
200 * which might be addressible only on a processor on which the process
201 * is running.
202 *
203 * Field markings and the corresponding locks:
204 *
205 * a: p_auxlock
206 * k: ktrace_mutex
207 * l: proc_lock
208 * t: p_stmutex
209 * p: p_lock
210 * (: updated atomically
211 * :: unlocked, stable
212 */
213 struct vmspace;
214
215 struct proc {
216 LIST_ENTRY(proc) p_list; /* l: List of all processes */
217
218 kmutex_t p_auxlock; /* :: secondary, longer term lock */
219 kmutex_t *p_lock; /* :: general mutex */
220 kmutex_t p_stmutex; /* :: mutex on profiling state */
221 krwlock_t p_reflock; /* p: lock for debugger, procfs */
222 kcondvar_t p_waitcv; /* p: wait, stop CV on children */
223 kcondvar_t p_lwpcv; /* p: wait, stop CV on LWPs */
224
225 /* Substructures: */
226 struct kauth_cred *p_cred; /* p: Master copy of credentials */
227 struct filedesc *p_fd; /* :: Ptr to open files structure */
228 struct cwdinfo *p_cwdi; /* :: cdir/rdir/cmask info */
229 struct pstats *p_stats; /* :: Accounting/stats (PROC ONLY) */
230 struct plimit *p_limit; /* :: Process limits */
231 struct vmspace *p_vmspace; /* :: Address space */
232 struct sigacts *p_sigacts; /* :: Process sigactions */
233 struct aioproc *p_aio; /* p: Asynchronous I/O data */
234 u_int p_mqueue_cnt; /* (: Count of open message queues */
235 specificdata_reference
236 p_specdataref; /* subsystem proc-specific data */
237
238 int p_exitsig; /* l: signal to send to parent on exit */
239 int p_flag; /* p: PK_* flags */
240 int p_sflag; /* p: PS_* flags */
241 int p_slflag; /* s, l: PSL_* flags */
242 int p_lflag; /* l: PL_* flags */
243 int p_stflag; /* t: PST_* flags */
244 char p_stat; /* p: S* process status. */
245 char p_trace_enabled;/* p: cached by syscall_intern() */
246 char p_pad1[2]; /* unused */
247
248 pid_t p_pid; /* :: Process identifier. */
249 LIST_ENTRY(proc) p_pglist; /* l: List of processes in pgrp. */
250 struct proc *p_pptr; /* l: Pointer to parent process. */
251 LIST_ENTRY(proc) p_sibling; /* l: List of sibling processes. */
252 LIST_HEAD(, proc) p_children; /* l: List of children. */
253 LIST_HEAD(, lwp) p_lwps; /* p: List of LWPs. */
254 struct ras *p_raslist; /* a: List of RAS entries */
255
256 /* The following fields are all zeroed upon creation in fork. */
257 #define p_startzero p_nlwps
258
259 int p_nlwps; /* p: Number of LWPs */
260 int p_nzlwps; /* p: Number of zombie LWPs */
261 int p_nrlwps; /* p: Number running/sleeping LWPs */
262 int p_nlwpwait; /* p: Number of LWPs in lwp_wait1() */
263 int p_ndlwps; /* p: Number of detached LWPs */
264 int p_nlwpid; /* p: Next LWP ID */
265 u_int p_nstopchild; /* l: Count of stopped/dead children */
266 u_int p_waited; /* l: parent has waited on child */
267 struct lwp *p_zomblwp; /* p: detached LWP to be reaped */
268 struct lwp *p_vforklwp; /* p: parent LWP waiting at vfork() */
269
270 /* scheduling */
271 void *p_sched_info; /* p: Scheduler-specific structure */
272 fixpt_t p_estcpu; /* p: Time avg. value of p_cpticks */
273 fixpt_t p_estcpu_inherited; /* p: cpu inherited from children */
274 unsigned int p_forktime;
275 fixpt_t p_pctcpu; /* p: %cpu from dead LWPs */
276
277 struct proc *p_opptr; /* l: save parent during ptrace. */
278 struct ptimers *p_timers; /* Timers: real, virtual, profiling */
279 struct bintime p_rtime; /* p: real time */
280 u_quad_t p_uticks; /* t: Statclock hits in user mode */
281 u_quad_t p_sticks; /* t: Statclock hits in system mode */
282 u_quad_t p_iticks; /* t: Statclock hits processing intr */
283
284 int p_traceflag; /* k: Kernel trace points */
285 void *p_tracep; /* k: Trace private data */
286 struct vnode *p_textvp; /* :: Vnode of executable */
287
288 struct emul *p_emul; /* :: emulation information */
289 void *p_emuldata; /* :: per-proc emul data, or NULL */
290 const struct execsw *p_execsw; /* :: exec package information */
291 struct klist p_klist; /* p: knotes attached to proc */
292
293 LIST_HEAD(, lwp) p_sigwaiters; /* p: LWPs waiting for signals */
294 sigpend_t p_sigpend; /* p: pending signals */
295 struct lcproc *p_lwpctl; /* p, a: _lwp_ctl() information */
296 pid_t p_ppid; /* :: cached parent pid */
297 pid_t p_fpid; /* :: forked pid */
298
299 /*
300 * End area that is zeroed on creation
301 */
302 #define p_endzero p_startcopy
303
304 /*
305 * The following fields are all copied upon creation in fork.
306 */
307 #define p_startcopy p_sigctx
308
309 struct sigctx p_sigctx; /* p: Shared signal state */
310
311 u_char p_nice; /* p: Process "nice" value */
312 char p_comm[MAXCOMLEN+1];
313 /* p: basename of last exec file */
314 struct pgrp *p_pgrp; /* l: Pointer to process group */
315
316 vaddr_t p_psstrp; /* :: address of process's ps_strings */
317 u_int p_pax; /* :: PAX flags */
318
319 /*
320 * End area that is copied on creation
321 */
322 #define p_endcopy p_xstat
323
324 u_short p_xstat; /* p: Exit status for wait; also stop signal */
325 u_short p_acflag; /* p: Acc. flags; see struct lwp also */
326 struct mdproc p_md; /* p: Any machine-dependent fields */
327 vaddr_t p_stackbase; /* :: ASLR randomized stack base */
328 struct kdtrace_proc *p_dtrace; /* :: DTrace-specific data. */
329 };
330
331 #define p_rlimit p_limit->pl_rlimit
332 #define p_session p_pgrp->pg_session
333 #define p_pgid p_pgrp->pg_id
334
335 #endif /* _KMEMUSER || _KERNEL */
336
337 /*
338 * Status values.
339 */
340 #define SIDL 1 /* Process being created by fork */
341 #define SACTIVE 2 /* Process is not stopped */
342 #define SDYING 3 /* About to die */
343 #define SSTOP 4 /* Process debugging or suspension */
344 #define SZOMB 5 /* Awaiting collection by parent */
345 #define SDEAD 6 /* Almost a zombie */
346
347 #define P_ZOMBIE(p) \
348 ((p)->p_stat == SZOMB || (p)->p_stat == SDYING || (p)->p_stat == SDEAD)
349
350 /*
351 * These flags are kept in p_flag and are protected by p_lock. Access from
352 * process context only.
353 */
354 #define PK_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory lock */
355 #define PK_SYSTEM 0x00000002 /* System process (kthread) */
356 #define PK_SYSVSEM 0x00000004 /* Used SysV semaphores */
357 #define PK_SUGID 0x00000100 /* Had set id privileges since last exec */
358 #define PK_EXEC 0x00004000 /* Process called exec */
359 #define PK_NOCLDWAIT 0x00020000 /* No zombies if child dies */
360 #define PK_32 0x00040000 /* 32-bit process (used on 64-bit kernels) */
361 #define PK_CLDSIGIGN 0x00080000 /* Process is ignoring SIGCHLD */
362 #define PK_MARKER 0x80000000 /* Is a dummy marker process */
363
364 /*
365 * These flags are kept in p_sflag and are protected by p_lock. Access from
366 * process context only.
367 */
368 #define PS_NOCLDSTOP 0x00000008 /* No SIGCHLD when children stop */
369 #define PS_RUMP_LWPEXIT 0x00000400 /* LWPs in RUMP kernel should exit for GC */
370 #define PS_WCORE 0x00001000 /* Process needs to dump core */
371 #define PS_WEXIT 0x00002000 /* Working on exiting */
372 #define PS_STOPFORK 0x00800000 /* Child will be stopped on fork(2) */
373 #define PS_STOPEXEC 0x01000000 /* Will be stopped on exec(2) */
374 #define PS_STOPEXIT 0x02000000 /* Will be stopped at process exit */
375 #define PS_NOTIFYSTOP 0x10000000 /* Notify parent of successful STOP */
376 #define PS_STOPPING 0x80000000 /* Transitioning SACTIVE -> SSTOP */
377
378 /*
379 * These flags are kept in p_sflag and are protected by the proc_lock
380 * and p_lock. Access from process context only.
381 */
382 #define PSL_TRACEFORK 0x00000001 /* traced process wants fork events */
383 #define PSL_TRACED 0x00000800 /* Debugged process being traced */
384 #define PSL_FSTRACE 0x00010000 /* Debugger process being traced by procfs */
385 #define PSL_CHTRACED 0x00400000 /* Child has been traced & reparented */
386 #define PSL_SYSCALL 0x04000000 /* process has PT_SYSCALL enabled */
387 #define PSL_SYSCALLEMU 0x08000000 /* cancel in-progress syscall */
388
389 /*
390 * Kept in p_stflag and protected by p_stmutex.
391 */
392 #define PST_PROFIL 0x00000020 /* Has started profiling */
393
394 /*
395 * The final set are protected by the proc_lock. Access
396 * from process context only.
397 */
398 #define PL_CONTROLT 0x00000002 /* Has a controlling terminal */
399 #define PL_PPWAIT 0x00000010 /* Parent is waiting for child exec/exit */
400 #define PL_SIGCOMPAT 0x00000200 /* Has used compat signal trampoline */
401 #define PL_ORPHANPG 0x20000000 /* Member of an orphaned pgrp */
402
403 #if defined(_KMEMUSER) || defined(_KERNEL)
404
405 /*
406 * Macro to compute the exit signal to be delivered.
407 */
408 #define P_EXITSIG(p) \
409 (((p)->p_slflag & (PSL_TRACED|PSL_FSTRACE)) ? SIGCHLD : p->p_exitsig)
410
411 LIST_HEAD(proclist, proc); /* A list of processes */
412
413 /*
414 * This structure associates a proclist with its lock.
415 */
416 struct proclist_desc {
417 struct proclist *pd_list; /* The list */
418 /*
419 * XXX Add a pointer to the proclist's lock eventually.
420 */
421 };
422
423 #ifdef _KERNEL
424
425 /*
426 * We use process IDs <= PID_MAX until there are > 16k processes.
427 * NO_PGID is used to represent "no process group" for a tty.
428 */
429 #define PID_MAX 30000
430 #define NO_PGID ((pid_t)-1)
431
432 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
433
434 /*
435 * Flags passed to fork1().
436 */
437 #define FORK_PPWAIT 0x0001 /* Block parent until child exit */
438 #define FORK_SHAREVM 0x0002 /* Share vmspace with parent */
439 #define FORK_SHARECWD 0x0004 /* Share cdir/rdir/cmask */
440 #define FORK_SHAREFILES 0x0008 /* Share file descriptors */
441 #define FORK_SHARESIGS 0x0010 /* Share signal actions */
442 #define FORK_NOWAIT 0x0020 /* Make init the parent of the child */
443 #define FORK_CLEANFILES 0x0040 /* Start with a clean descriptor set */
444 #define FORK_SYSTEM 0x0080 /* Fork a kernel thread */
445
446 extern struct proc proc0; /* Process slot for swapper */
447 extern u_int nprocs; /* Current number of procs */
448 extern int maxproc; /* Max number of procs */
449 #define vmspace_kernel() (proc0.p_vmspace)
450
451 extern kmutex_t *proc_lock;
452 extern struct proclist allproc; /* List of all processes */
453 extern struct proclist zombproc; /* List of zombie processes */
454
455 extern struct proc *initproc; /* Process slots for init, pager */
456
457 extern const struct proclist_desc proclists[];
458
459 extern struct pool ptimer_pool; /* Memory pool for ptimers */
460
461 int proc_find_locked(struct lwp *, struct proc **, pid_t);
462 proc_t * proc_find_raw(pid_t);
463 proc_t * proc_find(pid_t); /* Find process by ID */
464 struct pgrp * pgrp_find(pid_t); /* Find process group by ID */
465
466 void procinit(void);
467 void procinit_sysctl(void);
468 int proc_enterpgrp(struct proc *, pid_t, pid_t, bool);
469 void proc_leavepgrp(struct proc *);
470 void proc_sesshold(struct session *);
471 void proc_sessrele(struct session *);
472 void fixjobc(struct proc *, struct pgrp *, int);
473
474 int tsleep(wchan_t, pri_t, const char *, int);
475 int mtsleep(wchan_t, pri_t, const char *, int, kmutex_t *);
476 void wakeup(wchan_t);
477 int kpause(const char *, bool, int, kmutex_t *);
478 void exit1(struct lwp *, int) __dead;
479 int kill1(struct lwp *l, pid_t pid, ksiginfo_t *ksi, register_t *retval);
480 int do_sys_wait(int *, int *, int, struct rusage *);
481 struct proc *proc_alloc(void);
482 void proc0_init(void);
483 pid_t proc_alloc_pid(struct proc *);
484 void proc_free_pid(pid_t);
485 void proc_free_mem(struct proc *);
486 void exit_lwps(struct lwp *l);
487 int fork1(struct lwp *, int, int, void *, size_t,
488 void (*)(void *), void *, register_t *, struct proc **);
489 int pgid_in_session(struct proc *, pid_t);
490 void cpu_lwp_fork(struct lwp *, struct lwp *, void *, size_t,
491 void (*)(void *), void *);
492 void cpu_lwp_free(struct lwp *, int);
493 void cpu_lwp_free2(struct lwp *);
494 void cpu_spawn_return(struct lwp*);
495
496 #ifdef __HAVE_SYSCALL_INTERN
497 void syscall_intern(struct proc *);
498 #endif
499
500 void child_return(void *);
501
502 int proc_isunder(struct proc *, struct lwp *);
503 void proc_stop(struct proc *, int, int);
504 int proc_uidmatch(kauth_cred_t, kauth_cred_t);
505
506 int proc_vmspace_getref(struct proc *, struct vmspace **);
507 void proc_crmod_leave(kauth_cred_t, kauth_cred_t, bool);
508 void proc_crmod_enter(void);
509
510 int proc_specific_key_create(specificdata_key_t *, specificdata_dtor_t);
511 void proc_specific_key_delete(specificdata_key_t);
512 void proc_initspecific(struct proc *);
513 void proc_finispecific(struct proc *);
514 void * proc_getspecific(struct proc *, specificdata_key_t);
515 void proc_setspecific(struct proc *, specificdata_key_t, void *);
516 int proc_compare(const struct proc *, const struct lwp *,
517 const struct proc *, const struct lwp *);
518
519 int proclist_foreach_call(struct proclist *,
520 int (*)(struct proc *, void *arg), void *);
521
522 static inline struct proc *
_proclist_skipmarker(struct proc * p0)523 _proclist_skipmarker(struct proc *p0)
524 {
525 struct proc *p = p0;
526
527 while (p != NULL && p->p_flag & PK_MARKER)
528 p = LIST_NEXT(p, p_list);
529
530 return p;
531 }
532
533 /*
534 * PROCLIST_FOREACH: iterate on the given proclist, skipping PK_MARKER ones.
535 */
536 #define PROCLIST_FOREACH(var, head) \
537 for ((var) = LIST_FIRST(head); \
538 ((var) = _proclist_skipmarker(var)) != NULL; \
539 (var) = LIST_NEXT(var, p_list))
540
541 #ifdef KSTACK_CHECK_MAGIC
542 void kstack_setup_magic(const struct lwp *);
543 void kstack_check_magic(const struct lwp *);
544 #else
545 #define kstack_setup_magic(x)
546 #define kstack_check_magic(x)
547 #endif
548
549 extern struct emul emul_netbsd;
550
551 #endif /* _KERNEL */
552
553 /*
554 * Kernel stack parameters.
555 *
556 * KSTACK_LOWEST_ADDR: return the lowest address of the LWP's kernel stack,
557 * excluding red-zone.
558 *
559 * KSTACK_SIZE: the size kernel stack for a LWP, excluding red-zone.
560 *
561 * if <machine/proc.h> provides the MD definition, it will be used.
562 */
563 #ifndef KSTACK_LOWEST_ADDR
564 #define KSTACK_LOWEST_ADDR(l) ((void *)ALIGN((struct pcb *)((l)->l_addr) + 1))
565 #endif
566 #ifndef KSTACK_SIZE
567 #define KSTACK_SIZE (USPACE - ALIGN(sizeof(struct pcb)))
568 #endif
569
570 #endif /* _KMEMUSER || _KERNEL */
571
572 #endif /* !_SYS_PROC_H_ */
573