 @@ -1,565 +1,567 @@
-/*	$NetBSD: proc.h,v 1.307 2011/05/02 22:27:53 rmind Exp $	*/
+/*	$NetBSD: proc.h,v 1.308 2011/07/27 13:20:07 uebayasi Exp $	*/
 /*-
  * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Andrew Doran.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*-
  * Copyright (c) 1986, 1989, 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  * (c) UNIX System Laboratories, Inc.
  * All or some portions of this file are derived from material licensed
  * to the University of California by American Telephone and Telegraph
  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  * the permission of UNIX System Laboratories, Inc.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
  *	@(#)proc.h	8.15 (Berkeley) 5/19/95
  */
 #ifndef _SYS_PROC_H_
 #define	_SYS_PROC_H_
 #if defined(_KERNEL_OPT)
 #include "opt_multiprocessor.h"
 #include "opt_kstack.h"
 #include "opt_lockdebug.h"
 #endif
 #include <machine/proc.h>		/* Machine-dependent proc substruct */
 #include <sys/aio.h>
 #include <sys/rwlock.h>
 #include <sys/mqueue.h>
 #include <sys/mutex.h>
 #include <sys/condvar.h>
 #include <sys/lwp.h>
 #include <sys/queue.h>
 #include <sys/signalvar.h>
 #include <sys/siginfo.h>
 #include <sys/event.h>
 #include <sys/specificdata.h>
 #ifndef _KERNEL
 #include <sys/time.h>
 #include <sys/resource.h>
 #endif
 /*
  * One structure allocated per session.
  */
 struct session {
 	int		s_count;	/* Ref cnt; pgrps in session */
 	u_int		s_flags;
 #define	S_LOGIN_SET	1		/* s_login set in this session */
 	struct proc	*s_leader;	/* Session leader */
 	struct vnode	*s_ttyvp;	/* Vnode of controlling terminal */
 	struct tty	*s_ttyp;	/* Controlling terminal */
 	char		s_login[MAXLOGNAME]; /* Setlogin() name */
 	pid_t		s_sid;		/* Session ID (pid of leader) */
 };
 /*
  * One structure allocated per process group.
  */
 struct pgrp {
 	LIST_HEAD(, proc) pg_members;	/* Pointer to pgrp members */
 	struct session	*pg_session;	/* Pointer to session */
 	pid_t		pg_id;		/* Pgrp id */
 	int		pg_jobc;	/*
 					 * Number of processes qualifying
 					 * pgrp for job control
 					 */
 };
 /*
  * One structure allocated per emulation.
  */
 struct exec_package;
 struct ras;
 struct kauth_cred;
 struct emul {
 	const char	*e_name;	/* Symbolic name */
 	const char	*e_path;	/* Extra emulation path (NULL if none)*/
 #ifndef __HAVE_MINIMAL_EMUL
 	int		e_flags;	/* Miscellaneous flags, see above */
 					/* Syscall handling function */
 	const int	*e_errno;	/* Errno array */
 	int		e_nosys;	/* Offset of the nosys() syscall */
 	int		e_nsysent;	/* Number of system call entries */
 #endif
 	struct sysent	*e_sysent;	/* System call array */
 	const char * const *e_syscallnames; /* System call name array */
 					/* Signal sending function */
 	void		(*e_sendsig)(const struct ksiginfo *,
 					  const sigset_t *);
 	void		(*e_trapsignal)(struct lwp *, struct ksiginfo *);
 	int		(*e_tracesig)(struct proc *, int);
 	char		*e_sigcode;	/* Start of sigcode */
 	char		*e_esigcode;	/* End of sigcode */
 					/* Set registers before execution */
 	struct uvm_object **e_sigobject;/* shared sigcode object */
 	void		(*e_setregs)(struct lwp *, struct exec_package *,
 					  vaddr_t);
 					/* Per-process hooks */
 	void		(*e_proc_exec)(struct proc *, struct exec_package *);
 	void		(*e_proc_fork)(struct proc *, struct lwp *, int);
 	void		(*e_proc_exit)(struct proc *);
 	void		(*e_lwp_fork)(struct lwp *, struct lwp *);
 	void		(*e_lwp_exit)(struct lwp *);
 #ifdef __HAVE_SYSCALL_INTERN
 	void		(*e_syscall_intern)(struct proc *);
 #else
 	void		(*e_syscall)(void);
 #endif
 					/* Emulation specific sysctl data */
 	struct sysctlnode *e_sysctlovly;
 	int		(*e_fault)(struct proc *, vaddr_t, int);
 	vaddr_t		(*e_vm_default_addr)(struct proc *, vaddr_t, vsize_t);
 	/* Emulation-specific hook for userspace page faults */
 	int		(*e_usertrap)(struct lwp *, vaddr_t, void *);
 	/* SA-related information */
 	const struct sa_emul *e_sa;
 	size_t		e_ucsize;	/* size of ucontext_t */
 	void		(*e_startlwp)(void *);
 };
 /*
  * Emulation miscelaneous flags
  */
 #define	EMUL_HAS_SYS___syscall	0x001	/* Has SYS___syscall */
 /*
  * Description of a process.
+ *
  * This structure contains the information needed to manage a thread of
  * control, known in UN*X as a process; it has references to substructures
  * containing descriptions of things that the process uses, but may share
  * with related processes.  The process structure and the substructures
  * are always addressible except for those marked "(PROC ONLY)" below,
  * which might be addressible only on a processor on which the process
  * is running.
+ *
  * Field markings and the corresponding locks:
+ *
  * a:	p_auxlock
  * k:	ktrace_mutex
  * l:	proc_lock
  * t:	p_stmutex
  * p:	p_lock
  * (:	updated atomically
  * ::	unlocked, stable
  */
 struct vmspace;
 struct proc {
 	LIST_ENTRY(proc) p_list;	/* l: List of all processes */
 	kmutex_t	p_auxlock;	/* :: secondary, longer term lock */
 	kmutex_t	*p_lock;	/* :: general mutex */
 	kmutex_t	p_stmutex;	/* :: mutex on profiling state */
 	krwlock_t	p_reflock;	/* p: lock for debugger, procfs */
 	kcondvar_t	p_waitcv;	/* p: wait, stop CV on children */
 	kcondvar_t	p_lwpcv;	/* p: wait, stop CV on LWPs */
 	/* Substructures: */
 	struct kauth_cred *p_cred;	/* p: Master copy of credentials */
 	struct filedesc	*p_fd;		/* :: Ptr to open files structure */
 	struct cwdinfo	*p_cwdi;	/* :: cdir/rdir/cmask info */
 	struct pstats	*p_stats;	/* :: Accounting/stats (PROC ONLY) */
 	struct plimit	*p_limit;	/* :: Process limits */
 	struct vmspace	*p_vmspace;	/* :: Address space */
 	struct sigacts	*p_sigacts;	/* :: Process sigactions */
 	struct aioproc	*p_aio;		/* p: Asynchronous I/O data */
 	u_int		p_mqueue_cnt;	/* (: Count of open message queues */
 	specificdata_reference
 			p_specdataref;	/*    subsystem proc-specific data */
 	int		p_exitsig;	/* l: signal to send to parent on exit */
 	int		p_flag;		/* p: PK_* flags */
 	int		p_sflag;	/* p: PS_* flags */
 	int		p_slflag;	/* s, l: PSL_* flags */
 	int		p_lflag;	/* l: PL_* flags */
 	int		p_stflag;	/* t: PST_* flags */
 	char		p_stat;		/* p: S* process status. */
 	char		p_trace_enabled;/* p: cached by syscall_intern() */
 	char		p_pad1[2];	/*  unused */
 	pid_t		p_pid;		/* :: Process identifier. */
 	LIST_ENTRY(proc) p_pglist;	/* l: List of processes in pgrp. */
 	struct proc 	*p_pptr;	/* l: Pointer to parent process. */
 	LIST_ENTRY(proc) p_sibling;	/* l: List of sibling processes. */
 	LIST_HEAD(, proc) p_children;	/* l: List of children. */
 	LIST_HEAD(, lwp) p_lwps;	/* p: List of LWPs. */
 	struct ras	*p_raslist;	/* a: List of RAS entries */
 /* The following fields are all zeroed upon creation in fork. */
 #define	p_startzero	p_nlwps
 	int 		p_nlwps;	/* p: Number of LWPs */
 	int 		p_nzlwps;	/* p: Number of zombie LWPs */
 	int		p_nrlwps;	/* p: Number running/sleeping LWPs */
 	int		p_nlwpwait;	/* p: Number of LWPs in lwp_wait1() */
 	int		p_ndlwps;	/* p: Number of detached LWPs */
 	int 		p_nlwpid;	/* p: Next LWP ID */
 	u_int		p_nstopchild;	/* l: Count of stopped/dead children */
 	u_int		p_waited;	/* l: parent has waited on child */
 	struct lwp	*p_zomblwp;	/* p: detached LWP to be reaped */
 	struct sadata	*p_sa;		/* p: Scheduler activation info */
 	/* scheduling */
 	void		*p_sched_info;	/* p: Scheduler-specific structure */
 	fixpt_t		p_estcpu;	/* p: Time avg. value of p_cpticks */
 	fixpt_t		p_estcpu_inherited; /* p: cpu inherited from children */
 	unsigned int	p_forktime;
 	fixpt_t         p_pctcpu;       /* p: %cpu from dead LWPs */
 	struct proc	*p_opptr;	/* l: save parent during ptrace. */
 	struct ptimers	*p_timers;	/*    Timers: real, virtual, profiling */
 	struct bintime 	p_rtime;	/* p: real time */
 	u_quad_t 	p_uticks;	/* t: Statclock hits in user mode */
 	u_quad_t 	p_sticks;	/* t: Statclock hits in system mode */
 	u_quad_t 	p_iticks;	/* t: Statclock hits processing intr */
 	int		p_traceflag;	/* k: Kernel trace points */
 	int		p_timerpend;	/* p: Pending itimer to run */
 	void		*p_tracep;	/* k: Trace private data */
 	struct vnode 	*p_textvp;	/* :: Vnode of executable */
 	struct emul	*p_emul;	/* :: emulation information */
 	void		*p_emuldata;	/* :: per-proc emul data, or NULL */
 	const struct execsw *p_execsw;	/* :: exec package information */
 	struct klist	p_klist;	/* p: knotes attached to proc */
 	LIST_HEAD(, lwp) p_sigwaiters;	/* p: LWPs waiting for signals */
 	sigpend_t	p_sigpend;	/* p: pending signals */
 	struct lcproc	*p_lwpctl;	/* p, a: _lwp_ctl() information */
 	pid_t		p_ppid;		/* :: cached parent pid */
 /*
  * End area that is zeroed on creation
  */
 #define	p_endzero	p_startcopy
 /*
  * The following fields are all copied upon creation in fork.
  */
 #define	p_startcopy	p_sigctx
 	struct sigctx 	p_sigctx;	/* p: Shared signal state */
 	u_char		p_nice;		/* p: Process "nice" value */
 	char		p_comm[MAXCOMLEN+1];
 					/* p: basename of last exec file */
 	struct pgrp 	*p_pgrp;	/* l: Pointer to process group */
 	vaddr_t		p_psstrp;	/* :: address of process's ps_strings */
 	u_int		p_pax;		/* :: PAX flags */
 /*
  * End area that is copied on creation
  */
 #define	p_endcopy	p_xstat
 	u_short		p_xstat;	/* p: Exit status for wait; also stop signal */
 	u_short		p_acflag;	/* p: Acc. flags; see struct lwp also */
 	struct mdproc	p_md;		/* p: Any machine-dependent fields */
 	vaddr_t		p_stackbase;	/* :: ASLR randomized stack base */
 	struct kdtrace_proc *p_dtrace;	/* :: DTrace-specific data. */
 };
 #define	p_rlimit	p_limit->pl_rlimit
 #define	p_session	p_pgrp->pg_session
 #define	p_pgid		p_pgrp->pg_id
 /*
  * Status values.
  */
 #define	SIDL		1		/* Process being created by fork */
 #define	SACTIVE		2		/* Process is not stopped */
 #define	SDYING		3		/* About to die */
 #define	SSTOP		4		/* Process debugging or suspension */
 #define	SZOMB		5		/* Awaiting collection by parent */
 #define	SDEAD	 	6		/* Almost a zombie */
 #define	P_ZOMBIE(p)	\
     ((p)->p_stat == SZOMB || (p)->p_stat == SDYING || (p)->p_stat == SDEAD)
 /*
  * These flags are kept in p_flag and are protected by p_lock.  Access from
  * process context only.
  */
 #define	PK_ADVLOCK	0x00000001 /* Process may hold a POSIX advisory lock */
 #define	PK_SYSTEM	0x00000002 /* System process (kthread) */
 #define	PK_SYSVSEM	0x00000004 /* Used SysV semaphores */
 #define	PK_SUGID	0x00000100 /* Had set id privileges since last exec */
 #define	PK_EXEC		0x00004000 /* Process called exec */
 #define	PK_NOCLDWAIT	0x00020000 /* No zombies if child dies */
 #define	PK_32		0x00040000 /* 32-bit process (used on 64-bit kernels) */
 #define	PK_CLDSIGIGN	0x00080000 /* Process is ignoring SIGCHLD */
 #define	PK_MARKER	0x80000000 /* Is a dummy marker process */
 /*
  * These flags are kept in p_sflag and are protected by p_lock.  Access from
  * process context only.
  */
 #define	PS_NOCLDSTOP	0x00000008 /* No SIGCHLD when children stop */
 #define	PS_SA		0x00000400 /* Process using scheduler activations */
 #define	PS_WCORE	0x00001000 /* Process needs to dump core */
 #define	PS_WEXIT	0x00002000 /* Working on exiting */
 #define	PS_STOPFORK	0x00800000 /* Child will be stopped on fork(2) */
 #define	PS_STOPEXEC	0x01000000 /* Will be stopped on exec(2) */
 #define	PS_STOPEXIT	0x02000000 /* Will be stopped at process exit */
 #define	PS_NOTIFYSTOP	0x10000000 /* Notify parent of successful STOP */
 #define	PS_NOSA 	0x40000000 /* Do not enable SA */
 #define	PS_STOPPING	0x80000000 /* Transitioning SACTIVE -> SSTOP */
 #define	PS_RUMP_LWPEXIT PS_SA      /* LWPs in rump kernel should exit for g/c */
 /*
  * These flags are kept in p_sflag and are protected by the proc_lock
  * and p_lock.  Access from process context only.
  */
 #define	PSL_TRACED	0x00000800 /* Debugged process being traced */
 #define	PSL_FSTRACE	0x00010000 /* Debugger process being traced by procfs */
 #define	PSL_CHTRACED	0x00400000 /* Child has been traced & reparented */
 #define	PSL_SYSCALL	0x04000000 /* process has PT_SYSCALL enabled */
 /*
  * Kept in p_stflag and protected by p_stmutex.
  */
 #define	PST_PROFIL	0x00000020 /* Has started profiling */
 /*
  * The final set are protected by the proc_lock.  Access
  * from process context only.
  */
 #define	PL_CONTROLT	0x00000002 /* Has a controlling terminal */
 #define	PL_PPWAIT	0x00000010 /* Parent is waiting for child exec/exit */
 #define	PL_SIGCOMPAT	0x00000200 /* Has used compat signal trampoline */
 #define	PL_ORPHANPG	0x20000000 /* Member of an orphaned pgrp */
 /*
  * Macro to compute the exit signal to be delivered.
  */
 #define	P_EXITSIG(p)	\
     (((p)->p_slflag & (PSL_TRACED|PSL_FSTRACE)) ? SIGCHLD : p->p_exitsig)
 LIST_HEAD(proclist, proc);		/* A list of processes */
 /*
  * This structure associates a proclist with its lock.
  */
 struct proclist_desc {
 	struct proclist	*pd_list;	/* The list */
 	/*
 	 * XXX Add a pointer to the proclist's lock eventually.
 	 */
 };
 #ifdef _KERNEL
 /*
  * We use process IDs <= PID_MAX until there are > 16k processes.
  * NO_PGID is used to represent "no process group" for a tty.
  */
 #define	PID_MAX		30000
 #define	NO_PGID		((pid_t)-1)
 #define	SESS_LEADER(p)	((p)->p_session->s_leader == (p))
 /*
  * Flags passed to fork1().
  */
 #define	FORK_PPWAIT	0x0001		/* Block parent until child exit */
 #define	FORK_SHAREVM	0x0002		/* Share vmspace with parent */
 #define	FORK_SHARECWD	0x0004		/* Share cdir/rdir/cmask */
 #define	FORK_SHAREFILES	0x0008		/* Share file descriptors */
 #define	FORK_SHARESIGS	0x0010		/* Share signal actions */
 #define	FORK_NOWAIT	0x0020		/* Make init the parent of the child */
 #define	FORK_CLEANFILES	0x0040		/* Start with a clean descriptor set */
 #define	FORK_SYSTEM	0x0080		/* Fork a kernel thread */
 extern struct proc	proc0;		/* Process slot for swapper */
 extern u_int		nprocs;		/* Current number of procs */
 extern int		maxproc;	/* Max number of procs */
 #define	vmspace_kernel()	(proc0.p_vmspace)
 extern kmutex_t		*proc_lock;
 extern struct proclist	allproc;	/* List of all processes */
 extern struct proclist	zombproc;	/* List of zombie processes */
 extern struct proc	*initproc;	/* Process slots for init, pager */
 extern const struct proclist_desc proclists[];
 extern struct pool	ptimer_pool;	/* Memory pool for ptimers */
 struct simplelock;
 proc_t *	proc_find_raw(pid_t);
 proc_t *	proc_find(pid_t);		/* Find process by ID */
 struct pgrp *	pgrp_find(pid_t);		/* Find process group by ID */
 void	procinit(void);
 void	procinit_sysctl(void);
 int	proc_enterpgrp(struct proc *, pid_t, pid_t, bool);
 void	proc_leavepgrp(struct proc *);
 void	proc_sesshold(struct session *);
 void	proc_sessrele(struct session *);
 void	fixjobc(struct proc *, struct pgrp *, int);
 int	ltsleep(wchan_t, pri_t, const char *, int, volatile struct simplelock *);
 int	mtsleep(wchan_t, pri_t, const char *, int, kmutex_t *);
 void	wakeup(wchan_t);
 void	wakeup_one(wchan_t);
 int	kpause(const char *, bool, int, kmutex_t *);
 void	exit1(struct lwp *, int) __dead;
 int	do_sys_wait(int *, int *, int, struct rusage *);
 struct proc *proc_alloc(void);
 void	proc0_init(void);
 pid_t	proc_alloc_pid(struct proc *);
 void	proc_free_pid(pid_t);
 void	proc_free_mem(struct proc *);
 void	exit_lwps(struct lwp *l);
 int	fork1(struct lwp *, int, int, void *, size_t,
 	    void (*)(void *), void *, register_t *, struct proc **);
 int	pgid_in_session(struct proc *, pid_t);
 void	cpu_lwp_fork(struct lwp *, struct lwp *, void *, size_t,
 	    void (*)(void *), void *);
 void	cpu_lwp_free(struct lwp *, int);
 void	cpu_lwp_free2(struct lwp *);
 #ifdef __HAVE_SYSCALL_INTERN
 void	syscall_intern(struct proc *);
 #endif
 void	child_return(void *);
 int	proc_isunder(struct proc *, struct lwp *);
 void	proc_stop(struct proc *, int, int);
 int	proc_uidmatch(kauth_cred_t, kauth_cred_t);
 int	proc_vmspace_getref(struct proc *, struct vmspace **);
 void	proc_crmod_leave(kauth_cred_t, kauth_cred_t, bool);
 void	proc_crmod_enter(void);
 int	proc_specific_key_create(specificdata_key_t *, specificdata_dtor_t);
 void	proc_specific_key_delete(specificdata_key_t);
 void	proc_initspecific(struct proc *);
 void	proc_finispecific(struct proc *);
 void *	proc_getspecific(struct proc *, specificdata_key_t);
 void	proc_setspecific(struct proc *, specificdata_key_t, void *);
 int	proclist_foreach_call(struct proclist *,
     int (*)(struct proc *, void *arg), void *);
 static inline struct proc *
 _proclist_skipmarker(struct proc *p0)
+{
 	struct proc *p = p0;
 	while (p != NULL && p->p_flag & PK_MARKER)
 		p = LIST_NEXT(p, p_list);
 	return p;
+}
 /*
  * PROCLIST_FOREACH: iterate on the given proclist, skipping PK_MARKER ones.
  */
 #define	PROCLIST_FOREACH(var, head)					\
 	for ((var) = LIST_FIRST(head);					\
 		((var) = _proclist_skipmarker(var)) != NULL;		\
 		(var) = LIST_NEXT(var, p_list))
 /* Compatibility with old, non-interlocked tsleep call */
 #define	tsleep(chan, pri, wmesg, timo)					\
 	ltsleep(chan, pri, wmesg, timo, NULL)
 #ifdef KSTACK_CHECK_MAGIC
 void	kstack_setup_magic(const struct lwp *);
 void	kstack_check_magic(const struct lwp *);
 #else
 #define	kstack_setup_magic(x)
 #define	kstack_check_magic(x)
 #endif
 extern struct emul emul_netbsd;
 #endif	/* _KERNEL */
 #if defined(_KMEMUSER) || defined(_KERNEL)
 /*
  * Kernel stack parameters.
+ *
  * KSTACK_LOWEST_ADDR: return the lowest address of the LWP's kernel stack,
  * excluding red-zone.
+ *
  * KSTACK_SIZE: the size kernel stack for a LWP, excluding red-zone.
+ *
  * if <machine/proc.h> provides the MD definition, it will be used.
  */
 #ifndef KSTACK_LOWEST_ADDR
 #define	KSTACK_LOWEST_ADDR(l)	((void *)ALIGN((struct pcb *)((l)->l_addr) + 1))
 #endif
 #ifndef KSTACK_SIZE
 #define	KSTACK_SIZE		(USPACE - ALIGN(sizeof(struct pcb)))
 #endif
 #endif	/* _KMEMUSER || _KERNEL */
 #endif	/* !_SYS_PROC_H_ */