xnu-4570.1.46.tar.gz

[apple/xnu.git] / bsd / kern / kern_sysctl.c

/*
 * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Karels at Berkeley Software Design, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	@(#)kern_sysctl.c	8.4 (Berkeley) 4/14/94
 */
/*
 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
 * support for mandatory and extensible security protections.  This notice
 * is included in support of clause 2.2 (b) of the Apple Public License,
 * Version 2.0.
 */

/*
* DEPRECATED sysctl system call code
 *
 * Everything in this file is deprecated. Sysctls should be handled
 * by the code in kern_newsysctl.c.
 * The remaining "case" sections are supposed to be converted into
 * SYSCTL_*-style definitions, and as soon as all of them are gone,
 * this source file is supposed to die.
 *
 * DO NOT ADD ANY MORE "case" SECTIONS TO THIS FILE, instead define
 * your sysctl with SYSCTL_INT, SYSCTL_PROC etc. in your source file.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/file_internal.h>
#include <sys/vnode_internal.h>
#include <sys/unistd.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/namei.h>
#include <sys/tty.h>
#include <sys/disklabel.h>
#include <sys/vm.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <sys/aio_kern.h>
#include <sys/reboot.h>
#include <sys/memory_maintenance.h>
#include <sys/priv.h>
#include <stdatomic.h>

#include <security/audit/audit.h>
#include <kern/kalloc.h>

#include <machine/smp.h>
#include <mach/machine.h>
#include <mach/mach_host.h>
#include <mach/mach_types.h>
#include <mach/processor_info.h>
#include <mach/vm_param.h>
#include <kern/debug.h>
#include <kern/mach_param.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/thread_group.h>
#include <kern/processor.h>
#include <kern/cpu_number.h>
#include <kern/debug.h>
#include <kern/sched_prim.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <mach/host_info.h>

#include <sys/mount_internal.h>
#include <sys/kdebug.h>

#include <IOKit/IOPlatformExpert.h>
#include <pexpert/pexpert.h>

#include <machine/machine_routines.h>
#include <machine/exec.h>

#include <vm/vm_protos.h>
#include <vm/vm_pageout.h>
#include <vm/vm_compressor_algorithms.h>
#include <sys/imgsrc.h>
#include <kern/timer_call.h>

#if defined(__i386__) || defined(__x86_64__)
#include <i386/cpuid.h>
#endif

#if CONFIG_FREEZE
#include <sys/kern_memorystatus.h>
#endif

#if KPERF
#include <kperf/kperf.h>
#endif

#if HYPERVISOR
#include <kern/hv_support.h>
#endif

/*
 * deliberately setting max requests to really high number
 * so that runaway settings do not cause MALLOC overflows
 */
#define AIO_MAX_REQUESTS (128 * CONFIG_AIO_MAX)

extern int aio_max_requests;  				
extern int aio_max_requests_per_process;	
extern int aio_worker_threads;				
extern int lowpri_IO_window_msecs;
extern int lowpri_IO_delay_msecs;
extern int nx_enabled;
extern int speculative_reads_disabled;
extern unsigned int speculative_prefetch_max;
extern unsigned int speculative_prefetch_max_iosize;
extern unsigned int preheat_max_bytes;
extern unsigned int preheat_min_bytes;
extern long numvnodes;

extern uuid_string_t bootsessionuuid_string;

extern unsigned int vm_max_delayed_work_limit;
extern unsigned int vm_max_batch;

extern unsigned int vm_page_free_min;
extern unsigned int vm_page_free_target;
extern unsigned int vm_page_free_reserved;
extern unsigned int vm_page_speculative_percentage;
extern unsigned int vm_page_speculative_q_age_ms;

#if (DEVELOPMENT || DEBUG)
extern uint32_t	vm_page_creation_throttled_hard;
extern uint32_t	vm_page_creation_throttled_soft;
#endif /* DEVELOPMENT || DEBUG */

/*
 * Conditionally allow dtrace to see these functions for debugging purposes.
 */
#ifdef STATIC
#undef STATIC
#endif
#if 0
#define STATIC
#else
#define STATIC static
#endif

extern boolean_t    mach_timer_coalescing_enabled;

extern uint64_t timer_deadline_tracking_bin_1, timer_deadline_tracking_bin_2;

STATIC void
fill_user32_eproc(proc_t, struct user32_eproc *__restrict);
STATIC void
fill_user32_externproc(proc_t, struct user32_extern_proc *__restrict);
STATIC void
fill_user64_eproc(proc_t, struct user64_eproc *__restrict);
STATIC void
fill_user64_proc(proc_t, struct user64_kinfo_proc *__restrict);
STATIC void
fill_user64_externproc(proc_t, struct user64_extern_proc *__restrict);
STATIC void
fill_user32_proc(proc_t, struct user32_kinfo_proc *__restrict);

extern int 
kdbg_control(int *name, u_int namelen, user_addr_t where, size_t * sizep);
#if NFSCLIENT
extern int 
netboot_root(void);
#endif
int
pcsamples_ops(int *name, u_int namelen, user_addr_t where, size_t *sizep, 
              proc_t p);
int
sysctl_procargs(int *name, u_int namelen, user_addr_t where, 
				size_t *sizep, proc_t cur_proc);
STATIC int
sysctl_procargsx(int *name, u_int namelen, user_addr_t where, size_t *sizep, 
                 proc_t cur_proc, int argc_yes);
int
sysctl_struct(user_addr_t oldp, size_t *oldlenp, user_addr_t newp, 
              size_t newlen, void *sp, int len);

STATIC int sysdoproc_filt_KERN_PROC_PID(proc_t p, void * arg);
STATIC int sysdoproc_filt_KERN_PROC_PGRP(proc_t p, void * arg);
STATIC int sysdoproc_filt_KERN_PROC_TTY(proc_t p, void * arg);
STATIC int  sysdoproc_filt_KERN_PROC_UID(proc_t p, void * arg);
STATIC int  sysdoproc_filt_KERN_PROC_RUID(proc_t p, void * arg);
int sysdoproc_callback(proc_t p, void *arg);


/* forward declarations for non-static STATIC */
STATIC void fill_loadavg64(struct loadavg *la, struct user64_loadavg *la64);
STATIC void fill_loadavg32(struct loadavg *la, struct user32_loadavg *la32);
STATIC int sysctl_handle_kern_threadname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sched_stats(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sched_stats_enable(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_kdebug_ops SYSCTL_HANDLER_ARGS;
#if COUNT_SYSCALLS
STATIC int sysctl_docountsyscalls SYSCTL_HANDLER_ARGS;
#endif	/* COUNT_SYSCALLS */
#if !CONFIG_EMBEDDED
STATIC int sysctl_doprocargs SYSCTL_HANDLER_ARGS;
#endif	/* !CONFIG_EMBEDDED */
STATIC int sysctl_doprocargs2 SYSCTL_HANDLER_ARGS;
STATIC int sysctl_prochandle SYSCTL_HANDLER_ARGS;
STATIC int sysctl_aiomax(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_aioprocmax(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_aiothreads(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_maxproc(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_osversion(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sysctl_bootargs(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_maxvnodes(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_securelvl(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_domainname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_hostname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_procname(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_boottime(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_symfile(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#if NFSCLIENT
STATIC int sysctl_netboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
#ifdef CONFIG_IMGSRC_ACCESS
STATIC int sysctl_imgsrcdev(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
STATIC int sysctl_usrstack(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_usrstack64(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#if CONFIG_COREDUMP
STATIC int sysctl_coredump(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_suid_coredump(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
#endif
STATIC int sysctl_delayterm(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_rage_vnode(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_kern_check_openevt(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_nx(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_loadavg(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_vm_toggle_address_reuse(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_swapusage(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int fetch_process_cputype( proc_t cur_proc, int *name, u_int namelen, cpu_type_t *cputype);
STATIC int sysctl_sysctl_native(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_sysctl_cputype(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_safeboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_singleuser(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_minimalboot(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);
STATIC int sysctl_slide(struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req);


extern void IORegistrySetOSBuildVersion(char * build_version); 

STATIC void
fill_loadavg64(struct loadavg *la, struct user64_loadavg *la64)
{
	la64->ldavg[0]	= la->ldavg[0];
	la64->ldavg[1]	= la->ldavg[1];
	la64->ldavg[2]	= la->ldavg[2];
	la64->fscale	= (user64_long_t)la->fscale;
}

STATIC void
fill_loadavg32(struct loadavg *la, struct user32_loadavg *la32)
{
	la32->ldavg[0]	= la->ldavg[0];
	la32->ldavg[1]	= la->ldavg[1];
	la32->ldavg[2]	= la->ldavg[2];
	la32->fscale	= (user32_long_t)la->fscale;
}

#if CONFIG_COREDUMP
/*
 * Attributes stored in the kernel.
 */
extern char corefilename[MAXPATHLEN+1];
extern int do_coredump;
extern int sugid_coredump;
#endif

#if COUNT_SYSCALLS
extern int do_count_syscalls;
#endif

#ifdef INSECURE
int securelevel = -1;
#else
int securelevel;
#endif

STATIC int
sysctl_handle_kern_threadname(	__unused struct sysctl_oid *oidp, __unused void *arg1,
	      __unused int arg2, struct sysctl_req *req)
{
	int error;
	struct uthread *ut = get_bsdthread_info(current_thread());
	user_addr_t oldp=0, newp=0;
	size_t *oldlenp=NULL;
	size_t newlen=0;

	oldp = req->oldptr;
	oldlenp = &(req->oldlen);
	newp = req->newptr;
	newlen = req->newlen;

	/* We want the current length, and maybe the string itself */
	if(oldlenp) {
		/* if we have no thread name yet tell'em we want MAXTHREADNAMESIZE - 1 */
		size_t currlen = MAXTHREADNAMESIZE - 1;
		
		if(ut->pth_name)
			/* use length of current thread name */
			currlen = strlen(ut->pth_name);
		if(oldp) {
			if(*oldlenp < currlen)
				return ENOMEM;
			/* NOTE - we do not copy the NULL terminator */
			if(ut->pth_name) {
				error = copyout(ut->pth_name,oldp,currlen);
				if(error)
					return error;
			}
		}	
		/* return length of thread name minus NULL terminator (just like strlen)  */
		req->oldidx = currlen;
	}

	/* We want to set the name to something */
	if(newp) 
	{
		if(newlen > (MAXTHREADNAMESIZE - 1))
			return ENAMETOOLONG;
		if(!ut->pth_name)
		{
			ut->pth_name = (char*)kalloc( MAXTHREADNAMESIZE );
			if(!ut->pth_name)
				return ENOMEM;
		} else {
			kernel_debug_string_simple(TRACE_STRING_THREADNAME_PREV, ut->pth_name);
		}
		bzero(ut->pth_name, MAXTHREADNAMESIZE);
		error = copyin(newp, ut->pth_name, newlen);
		if (error) {
			return error;
		}

		kernel_debug_string_simple(TRACE_STRING_THREADNAME, ut->pth_name);
	}
		
	return 0;
}

SYSCTL_PROC(_kern, KERN_THREADNAME, threadname, CTLFLAG_ANYBODY | CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, sysctl_handle_kern_threadname,"A","");

#define BSD_HOST 1
STATIC int
sysctl_sched_stats(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	host_basic_info_data_t hinfo;
	kern_return_t kret;
	uint32_t size;
	int changed;
	mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
	struct _processor_statistics_np *buf;
	int error;

	kret = host_info((host_t)BSD_HOST, HOST_BASIC_INFO, (host_info_t)&hinfo, &count);
	if (kret != KERN_SUCCESS) {
		return EINVAL;
	}

	size = sizeof(struct _processor_statistics_np) * (hinfo.logical_cpu_max + 2); /* One for RT Queue, One for Fair Share Queue */
	
	if (req->oldlen < size) {
		return EINVAL;
	}

	MALLOC(buf, struct _processor_statistics_np*, size, M_TEMP, M_ZERO | M_WAITOK);
	
	kret = get_sched_statistics(buf, &size);
	if (kret != KERN_SUCCESS) {
		error = EINVAL;
		goto out;
	}

	error = sysctl_io_opaque(req, buf, size, &changed);
	if (error) {
		goto out;
	}

	if (changed) {
		panic("Sched info changed?!");
	}
out:
	FREE(buf, M_TEMP);
	return error;
}

SYSCTL_PROC(_kern, OID_AUTO, sched_stats, CTLFLAG_LOCKED, 0, 0, sysctl_sched_stats, "-", "");

STATIC int
sysctl_sched_stats_enable(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, __unused struct sysctl_req *req)
{
	boolean_t active;
	int res;

	if (req->newlen != sizeof(active)) {
		return EINVAL;
	}

	res = copyin(req->newptr, &active, sizeof(active));
	if (res != 0) {
		return res;
	}

	return set_sched_stats_active(active);
}

SYSCTL_PROC(_kern, OID_AUTO, sched_stats_enable, CTLFLAG_LOCKED | CTLFLAG_WR, 0, 0, sysctl_sched_stats_enable, "-", "");

extern uint32_t sched_debug_flags;
SYSCTL_INT(_debug, OID_AUTO, sched, CTLFLAG_RW | CTLFLAG_LOCKED, &sched_debug_flags, 0, "scheduler debug");

#if (DEBUG || DEVELOPMENT)
extern boolean_t doprnt_hide_pointers;
SYSCTL_INT(_debug, OID_AUTO, hide_kernel_pointers, CTLFLAG_RW | CTLFLAG_LOCKED, &doprnt_hide_pointers, 0, "hide kernel pointers from log");
#endif

extern int get_kernel_symfile(proc_t, char **);

#if COUNT_SYSCALLS
#define KERN_COUNT_SYSCALLS (KERN_OSTYPE + 1000)

extern unsigned int 	nsysent;
extern int syscalls_log[];
extern const char *syscallnames[];

STATIC int
sysctl_docountsyscalls SYSCTL_HANDLER_ARGS
{
	__unused int cmd = oidp->oid_arg2;	/* subcommand*/
	__unused int *name = arg1;	/* oid element argument vector */
	__unused int namelen = arg2;	/* number of oid element arguments */
	user_addr_t oldp = req->oldptr;	/* user buffer copy out address */
	size_t *oldlenp = &req->oldlen;	/* user buffer copy out size */
	user_addr_t newp = req->newptr;	/* user buffer copy in address */
	size_t newlen = req->newlen;	/* user buffer copy in size */
	int error;

	int tmp;

	/* valid values passed in:
	 * = 0 means don't keep called counts for each bsd syscall
	 * > 0 means keep called counts for each bsd syscall
	 * = 2 means dump current counts to the system log
	 * = 3 means reset all counts
	 * for example, to dump current counts:  
	 *		sysctl -w kern.count_calls=2
	 */
	error = sysctl_int(oldp, oldlenp, newp, newlen, &tmp);
	if ( error != 0 ) {
		return (error);
	}
		
	if ( tmp == 1 ) {
		do_count_syscalls = 1;
	}
	else if ( tmp == 0 || tmp == 2 || tmp == 3 ) {
		int			i;
		for ( i = 0; i < nsysent; i++ ) {
			if ( syscalls_log[i] != 0 ) {
				if ( tmp == 2 ) {
					printf("%d calls - name %s \n", syscalls_log[i], syscallnames[i]);
				}
				else {
					syscalls_log[i] = 0;
				}
			}
		}
		if ( tmp != 0 ) {
			do_count_syscalls = 1;
		}
	}

	/* adjust index so we return the right required/consumed amount */
	if (!error)
		req->oldidx += req->oldlen;

	return (error);
}
SYSCTL_PROC(_kern, KERN_COUNT_SYSCALLS, count_syscalls, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	0,			/* Integer argument (arg2) */
	sysctl_docountsyscalls,	/* Handler function */
	NULL,			/* Data pointer */
	"");
#endif	/* COUNT_SYSCALLS */

/*
 * The following sysctl_* functions should not be used
 * any more, as they can only cope with callers in
 * user mode: Use new-style
 *  sysctl_io_number()
 *  sysctl_io_string()
 *  sysctl_io_opaque()
 * instead.
 */

/*
 * Validate parameters and get old / set new parameters
 * for an integer-valued sysctl function.
 */
int
sysctl_int(user_addr_t oldp, size_t *oldlenp, 
           user_addr_t newp, size_t newlen, int *valp)
{
	int error = 0;

	if (oldp != USER_ADDR_NULL && oldlenp == NULL)
		return (EFAULT);
	if (oldp && *oldlenp < sizeof(int))
		return (ENOMEM);
	if (newp && newlen != sizeof(int))
		return (EINVAL);
	*oldlenp = sizeof(int);
	if (oldp)
		error = copyout(valp, oldp, sizeof(int));
	if (error == 0 && newp) {
		error = copyin(newp, valp, sizeof(int));
		AUDIT_ARG(value32, *valp);
	}
	return (error);
}

/*
 * Validate parameters and get old / set new parameters
 * for an quad(64bit)-valued sysctl function.
 */
int
sysctl_quad(user_addr_t oldp, size_t *oldlenp, 
            user_addr_t newp, size_t newlen, quad_t *valp)
{
	int error = 0;

	if (oldp != USER_ADDR_NULL && oldlenp == NULL)
		return (EFAULT);
	if (oldp && *oldlenp < sizeof(quad_t))
		return (ENOMEM);
	if (newp && newlen != sizeof(quad_t))
		return (EINVAL);
	*oldlenp = sizeof(quad_t);
	if (oldp)
		error = copyout(valp, oldp, sizeof(quad_t));
	if (error == 0 && newp)
		error = copyin(newp, valp, sizeof(quad_t));
	return (error);
}

STATIC int
sysdoproc_filt_KERN_PROC_PID(proc_t p, void * arg)
{
	if (p->p_pid != (pid_t)*(int*)arg)
		return(0);
	else
		return(1);
}

STATIC int
sysdoproc_filt_KERN_PROC_PGRP(proc_t p, void * arg)
{
	if (p->p_pgrpid != (pid_t)*(int*)arg)
		return(0);
	else
	  return(1);
}

STATIC int
sysdoproc_filt_KERN_PROC_TTY(proc_t p, void * arg)
{
	int retval;
	struct tty *tp;

	/* This is very racy but list lock is held.. Hmmm. */
	if ((p->p_flag & P_CONTROLT) == 0 ||
		(p->p_pgrp == NULL) || (p->p_pgrp->pg_session == NULL) ||
			(tp = SESSION_TP(p->p_pgrp->pg_session)) == TTY_NULL ||
			tp->t_dev != (dev_t)*(int*)arg)
				retval = 0;
	else
		retval = 1;

	return(retval);
}

STATIC int
sysdoproc_filt_KERN_PROC_UID(proc_t p, void * arg)
{
	kauth_cred_t my_cred;
	uid_t uid;

	if (p->p_ucred == NULL)
		return(0);
	my_cred = kauth_cred_proc_ref(p);
	uid = kauth_cred_getuid(my_cred);
	kauth_cred_unref(&my_cred);

	if (uid != (uid_t)*(int*)arg)
		return(0);
	else
		return(1);
}


STATIC int
sysdoproc_filt_KERN_PROC_RUID(proc_t p, void * arg)
{
	kauth_cred_t my_cred;
	uid_t ruid;

	if (p->p_ucred == NULL)
		return(0);
	my_cred = kauth_cred_proc_ref(p);
	ruid = kauth_cred_getruid(my_cred);
	kauth_cred_unref(&my_cred);

	if (ruid != (uid_t)*(int*)arg)
		return(0);
	else
		return(1);
}

/*
 * try over estimating by 5 procs
 */
#define KERN_PROCSLOP	(5 * sizeof (struct kinfo_proc))
struct sysdoproc_args {
	int	buflen;
	void	*kprocp;
	boolean_t is_64_bit;
	user_addr_t	dp;
	size_t needed;
	int sizeof_kproc;
	int *errorp;
	int uidcheck;
	int ruidcheck;
	int ttycheck;
	int uidval;
};

int
sysdoproc_callback(proc_t p, void *arg)
{
	struct sysdoproc_args *args = arg;

	if (args->buflen >= args->sizeof_kproc) {
		if ((args->ruidcheck != 0) && (sysdoproc_filt_KERN_PROC_RUID(p, &args->uidval) == 0))
			return (PROC_RETURNED);
		if ((args->uidcheck != 0) && (sysdoproc_filt_KERN_PROC_UID(p, &args->uidval) == 0))
			return (PROC_RETURNED);
		if ((args->ttycheck != 0) && (sysdoproc_filt_KERN_PROC_TTY(p, &args->uidval) == 0))
			return (PROC_RETURNED);

		bzero(args->kprocp, args->sizeof_kproc);
		if (args->is_64_bit)
			fill_user64_proc(p, args->kprocp);
		else
			fill_user32_proc(p, args->kprocp);
		int error = copyout(args->kprocp, args->dp, args->sizeof_kproc);
		if (error) {
			*args->errorp = error;
			return (PROC_RETURNED_DONE);
		}
		args->dp += args->sizeof_kproc;
		args->buflen -= args->sizeof_kproc;
	}
	args->needed += args->sizeof_kproc;
	return (PROC_RETURNED);
}

SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD | CTLFLAG_LOCKED, 0, "");
STATIC int
sysctl_prochandle SYSCTL_HANDLER_ARGS
{
	int cmd = oidp->oid_arg2;	/* subcommand for multiple nodes */
	int *name = arg1;		/* oid element argument vector */
	int namelen = arg2;		/* number of oid element arguments */
	user_addr_t where = req->oldptr;/* user buffer copy out address */

	user_addr_t dp = where;
	size_t needed = 0;
	int buflen = where != USER_ADDR_NULL ? req->oldlen : 0;
	int error = 0;
	boolean_t is_64_bit = proc_is64bit(current_proc());
	struct user32_kinfo_proc  user32_kproc;
	struct user64_kinfo_proc  user_kproc;
	int sizeof_kproc;
	void *kprocp;
	int (*filterfn)(proc_t, void *) = 0;
	struct sysdoproc_args args;
	int uidcheck = 0;
	int ruidcheck = 0;
	int ttycheck = 0;
	int success = 0;

	if (namelen != 1 && !(namelen == 0 && cmd == KERN_PROC_ALL))
		return (EINVAL);

	if (is_64_bit) {
		sizeof_kproc = sizeof(user_kproc);
		kprocp = &user_kproc;
	} else {
		sizeof_kproc = sizeof(user32_kproc);
		kprocp = &user32_kproc;
	}

	switch (cmd) {

		case KERN_PROC_PID:
			filterfn = sysdoproc_filt_KERN_PROC_PID;
			break;

		case KERN_PROC_PGRP:
			filterfn = sysdoproc_filt_KERN_PROC_PGRP;
			break;
	
		case KERN_PROC_TTY:
			ttycheck = 1;
			break;

		case KERN_PROC_UID:
			uidcheck = 1;
			break;

		case KERN_PROC_RUID:
			ruidcheck = 1;
			break;

		case KERN_PROC_ALL:
			break;

		default:
			/* must be kern.proc.<unknown> */
			return (ENOTSUP);
	}

	error = 0;
	args.buflen = buflen;
	args.kprocp = kprocp;
	args.is_64_bit = is_64_bit;
	args.dp = dp;
	args.needed = needed;
	args.errorp = &error;
	args.uidcheck = uidcheck;
	args.ruidcheck = ruidcheck;
	args.ttycheck = ttycheck;
	args.sizeof_kproc = sizeof_kproc;
	if (namelen)
		args.uidval = name[0];

	success = proc_iterate((PROC_ALLPROCLIST | PROC_ZOMBPROCLIST),
	              sysdoproc_callback, &args, filterfn, name);

	/*
	 * rdar://problem/28433391: if we can't iterate over the processes,
	 * make sure to return an error.
	 */

	if (success != 0)
		return (ENOMEM);

	if (error)
		return (error);

	dp = args.dp;
	needed = args.needed;
	
	if (where != USER_ADDR_NULL) {
		req->oldlen = dp - where;
		if (needed > req->oldlen)
			return (ENOMEM);
	} else {
		needed += KERN_PROCSLOP;
		req->oldlen = needed;
	}
	/* adjust index so we return the right required/consumed amount */
	req->oldidx += req->oldlen;
	return (0);
}

/*
 * We specify the subcommand code for multiple nodes as the 'req->arg2' value
 * in the sysctl declaration itself, which comes into the handler function
 * as 'oidp->oid_arg2'.
 *
 * For these particular sysctls, since they have well known OIDs, we could
 * have just obtained it from the '((int *)arg1)[0]' parameter, but that would
 * not demonstrate how to handle multiple sysctls that used OID_AUTO instead
 * of a well known value with a common handler function.  This is desirable,
 * because we want well known values to "go away" at some future date.
 *
 * It should be noted that the value of '((int *)arg1)[1]' is used for many
 * an integer parameter to the subcommand for many of these sysctls; we'd
 * rather have used '((int *)arg1)[0]' for that, or even better, an element
 * in a structure passed in as the the 'newp' argument to sysctlbyname(3),
 * and then use leaf-node permissions enforcement, but that would have
 * necessitated modifying user space code to correspond to the interface
 * change, and we are striving for binary backward compatibility here; even
 * though these are SPI, and not intended for use by user space applications
 * which are not themselves system tools or libraries, some applications
 * have erroneously used them.
 */
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_ALL,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_PID, pid, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_PID,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_TTY, tty, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_TTY,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_PGRP, pgrp, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_PGRP,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_UID, uid, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_UID,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_RUID, ruid, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_RUID,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");
SYSCTL_PROC(_kern_proc, KERN_PROC_LCID, lcid, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	KERN_PROC_LCID,		/* Integer argument (arg2) */
	sysctl_prochandle,	/* Handler function */
	NULL,			/* Data is size variant on ILP32/LP64 */
	"");


/*
 * Fill in non-zero fields of an eproc structure for the specified process.
 */
STATIC void
fill_user32_eproc(proc_t p, struct user32_eproc *__restrict ep)
{
	struct tty *tp;
	struct pgrp *pg;
	struct session *sessp;
	kauth_cred_t my_cred;

	pg = proc_pgrp(p);
	sessp = proc_session(p);

	if (pg != PGRP_NULL) {
		ep->e_pgid = p->p_pgrpid;
		ep->e_jobc = pg->pg_jobc;
		if (sessp != SESSION_NULL && sessp->s_ttyvp)
			ep->e_flag = EPROC_CTTY;
	}
	ep->e_ppid = p->p_ppid;
	if (p->p_ucred) {
		my_cred = kauth_cred_proc_ref(p);

		/* A fake historical pcred */
		ep->e_pcred.p_ruid = kauth_cred_getruid(my_cred);
		ep->e_pcred.p_svuid = kauth_cred_getsvuid(my_cred);
		ep->e_pcred.p_rgid = kauth_cred_getrgid(my_cred);
		ep->e_pcred.p_svgid = kauth_cred_getsvgid(my_cred);

		/* A fake historical *kauth_cred_t */
		ep->e_ucred.cr_ref = my_cred->cr_ref;
		ep->e_ucred.cr_uid = kauth_cred_getuid(my_cred);
		ep->e_ucred.cr_ngroups = posix_cred_get(my_cred)->cr_ngroups;
		bcopy(posix_cred_get(my_cred)->cr_groups,
			ep->e_ucred.cr_groups, NGROUPS * sizeof (gid_t));

		kauth_cred_unref(&my_cred);
	}

	if ((p->p_flag & P_CONTROLT) && (sessp != SESSION_NULL) &&
	     (tp = SESSION_TP(sessp))) {
		ep->e_tdev = tp->t_dev;
		ep->e_tpgid = sessp->s_ttypgrpid;
	} else
		ep->e_tdev = NODEV;

	if (sessp != SESSION_NULL) {
		if (SESS_LEADER(p, sessp))
			ep->e_flag |= EPROC_SLEADER;
		session_rele(sessp);
	}
	if (pg != PGRP_NULL)
		pg_rele(pg);
}

/*
 * Fill in non-zero fields of an LP64 eproc structure for the specified process.
 */
STATIC void
fill_user64_eproc(proc_t p, struct user64_eproc *__restrict ep)
{
	struct tty *tp;
	struct pgrp *pg;
	struct session *sessp;
	kauth_cred_t my_cred;
	
	pg = proc_pgrp(p);
	sessp = proc_session(p);

	if (pg != PGRP_NULL) {
		ep->e_pgid = p->p_pgrpid;
		ep->e_jobc = pg->pg_jobc;
		if (sessp != SESSION_NULL && sessp->s_ttyvp)
			ep->e_flag = EPROC_CTTY;
	}
	ep->e_ppid = p->p_ppid;
	if (p->p_ucred) {
		my_cred = kauth_cred_proc_ref(p);

		/* A fake historical pcred */
		ep->e_pcred.p_ruid = kauth_cred_getruid(my_cred);
		ep->e_pcred.p_svuid = kauth_cred_getsvuid(my_cred);
		ep->e_pcred.p_rgid = kauth_cred_getrgid(my_cred);
		ep->e_pcred.p_svgid = kauth_cred_getsvgid(my_cred);

		/* A fake historical *kauth_cred_t */
		ep->e_ucred.cr_ref = my_cred->cr_ref;
		ep->e_ucred.cr_uid = kauth_cred_getuid(my_cred);
		ep->e_ucred.cr_ngroups = posix_cred_get(my_cred)->cr_ngroups;
		bcopy(posix_cred_get(my_cred)->cr_groups,
			ep->e_ucred.cr_groups, NGROUPS * sizeof (gid_t));

		kauth_cred_unref(&my_cred);
	}

	if ((p->p_flag & P_CONTROLT) && (sessp != SESSION_NULL) &&
	     (tp = SESSION_TP(sessp))) {
		ep->e_tdev = tp->t_dev;
		ep->e_tpgid = sessp->s_ttypgrpid;
	} else
		ep->e_tdev = NODEV;

	if (sessp != SESSION_NULL) {
		if (SESS_LEADER(p, sessp))
			ep->e_flag |= EPROC_SLEADER;
		session_rele(sessp);
	}
	if (pg != PGRP_NULL)
		pg_rele(pg);
}

/*
 * Fill in an eproc structure for the specified process.
 * bzeroed by our caller, so only set non-zero fields.
 */
STATIC void
fill_user32_externproc(proc_t p, struct user32_extern_proc *__restrict exp)
{
	exp->p_starttime.tv_sec = p->p_start.tv_sec;
	exp->p_starttime.tv_usec = p->p_start.tv_usec;
	exp->p_flag = p->p_flag;
	if (p->p_lflag & P_LTRACED)
		exp->p_flag |= P_TRACED;
	if (p->p_lflag & P_LPPWAIT)
		exp->p_flag |= P_PPWAIT;
	if (p->p_lflag & P_LEXIT)
		exp->p_flag |= P_WEXIT;
	exp->p_stat = p->p_stat;
	exp->p_pid = p->p_pid;
	exp->p_oppid = p->p_oppid;
	/* Mach related  */
	exp->user_stack = p->user_stack;
	exp->p_debugger = p->p_debugger;
	exp->sigwait = p->sigwait;
	/* scheduling */
#ifdef _PROC_HAS_SCHEDINFO_
	exp->p_estcpu = p->p_estcpu;
	exp->p_pctcpu = p->p_pctcpu;
	exp->p_slptime = p->p_slptime;
#endif
	exp->p_realtimer.it_interval.tv_sec =
		(user32_time_t)p->p_realtimer.it_interval.tv_sec;
	exp->p_realtimer.it_interval.tv_usec =
		(__int32_t)p->p_realtimer.it_interval.tv_usec;

	exp->p_realtimer.it_value.tv_sec =
		(user32_time_t)p->p_realtimer.it_value.tv_sec;
	exp->p_realtimer.it_value.tv_usec =
		(__int32_t)p->p_realtimer.it_value.tv_usec;

	exp->p_rtime.tv_sec = (user32_time_t)p->p_rtime.tv_sec;
	exp->p_rtime.tv_usec = (__int32_t)p->p_rtime.tv_usec;

	exp->p_sigignore = p->p_sigignore;
	exp->p_sigcatch = p->p_sigcatch;
	exp->p_priority = p->p_priority;
	exp->p_nice = p->p_nice;
	bcopy(&p->p_comm, &exp->p_comm, MAXCOMLEN);
	exp->p_xstat = p->p_xstat;
	exp->p_acflag = p->p_acflag;
}

/*
 * Fill in an LP64 version of extern_proc structure for the specified process.
 */
STATIC void
fill_user64_externproc(proc_t p, struct user64_extern_proc *__restrict exp)
{
	exp->p_starttime.tv_sec = p->p_start.tv_sec;
	exp->p_starttime.tv_usec = p->p_start.tv_usec;
	exp->p_flag = p->p_flag;
	if (p->p_lflag & P_LTRACED)
		exp->p_flag |= P_TRACED;
	if (p->p_lflag & P_LPPWAIT)
		exp->p_flag |= P_PPWAIT;
	if (p->p_lflag & P_LEXIT)
		exp->p_flag |= P_WEXIT;
	exp->p_stat = p->p_stat;
	exp->p_pid = p->p_pid;
	exp->p_oppid = p->p_oppid;
	/* Mach related  */
	exp->user_stack = p->user_stack;
	exp->p_debugger = p->p_debugger;
	exp->sigwait = p->sigwait;
	/* scheduling */
#ifdef _PROC_HAS_SCHEDINFO_
	exp->p_estcpu = p->p_estcpu;
	exp->p_pctcpu = p->p_pctcpu;
	exp->p_slptime = p->p_slptime;
#endif
	exp->p_realtimer.it_interval.tv_sec = p->p_realtimer.it_interval.tv_sec;
	exp->p_realtimer.it_interval.tv_usec = p->p_realtimer.it_interval.tv_usec;

	exp->p_realtimer.it_value.tv_sec = p->p_realtimer.it_value.tv_sec;
	exp->p_realtimer.it_value.tv_usec = p->p_realtimer.it_value.tv_usec;

	exp->p_rtime.tv_sec = p->p_rtime.tv_sec;
	exp->p_rtime.tv_usec = p->p_rtime.tv_usec;

	exp->p_sigignore = p->p_sigignore;
	exp->p_sigcatch = p->p_sigcatch;
	exp->p_priority = p->p_priority;
	exp->p_nice = p->p_nice;
	bcopy(&p->p_comm, &exp->p_comm, MAXCOMLEN);
	exp->p_xstat = p->p_xstat;
	exp->p_acflag = p->p_acflag;
}

STATIC void
fill_user32_proc(proc_t p, struct user32_kinfo_proc *__restrict kp)
{
	/* on a 64 bit kernel, 32 bit users get some truncated information */
	fill_user32_externproc(p, &kp->kp_proc);
	fill_user32_eproc(p, &kp->kp_eproc);
}

STATIC void
fill_user64_proc(proc_t p, struct user64_kinfo_proc *__restrict kp)
{
	fill_user64_externproc(p, &kp->kp_proc);
	fill_user64_eproc(p, &kp->kp_eproc);
}

STATIC int
sysctl_kdebug_ops SYSCTL_HANDLER_ARGS
{
	__unused int cmd = oidp->oid_arg2;	/* subcommand*/
	int *name = arg1;		/* oid element argument vector */
	int namelen = arg2;		/* number of oid element arguments */
	user_addr_t oldp = req->oldptr;	/* user buffer copy out address */
	size_t *oldlenp = &req->oldlen;	/* user buffer copy out size */
//	user_addr_t newp = req->newptr;	/* user buffer copy in address */
//	size_t newlen = req->newlen;	/* user buffer copy in size */

	int ret=0;

	if (namelen == 0)
		return(ENOTSUP);

	switch(name[0]) {
	case KERN_KDEFLAGS:
	case KERN_KDDFLAGS:
	case KERN_KDENABLE:
	case KERN_KDGETBUF:
	case KERN_KDSETUP:
	case KERN_KDREMOVE:
	case KERN_KDSETREG:
	case KERN_KDGETREG:
	case KERN_KDREADTR:
	case KERN_KDWRITETR:
	case KERN_KDWRITEMAP:
	case KERN_KDTEST:
	case KERN_KDPIDTR:
	case KERN_KDTHRMAP:
	case KERN_KDPIDEX:
	case KERN_KDSETBUF:
	case KERN_KDREADCURTHRMAP:
	case KERN_KDSET_TYPEFILTER:
	case KERN_KDBUFWAIT:
	case KERN_KDCPUMAP:
	case KERN_KDWRITEMAP_V3:
	case KERN_KDWRITETR_V3:
		ret = kdbg_control(name, namelen, oldp, oldlenp);
		break;
	default:
		ret= ENOTSUP;
		break;
	}

	/* adjust index so we return the right required/consumed amount */
	if (!ret)
		req->oldidx += req->oldlen;

	return (ret);
}
SYSCTL_PROC(_kern, KERN_KDEBUG, kdebug, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	0,			/* Integer argument (arg2) */
	sysctl_kdebug_ops,	/* Handler function */
	NULL,			/* Data pointer */
	"");


#if !CONFIG_EMBEDDED
/*
 * Return the top *sizep bytes of the user stack, or the entire area of the
 * user stack down through the saved exec_path, whichever is smaller.
 */
STATIC int
sysctl_doprocargs SYSCTL_HANDLER_ARGS
{
	__unused int cmd = oidp->oid_arg2;	/* subcommand*/
	int *name = arg1;		/* oid element argument vector */
	int namelen = arg2;		/* number of oid element arguments */
	user_addr_t oldp = req->oldptr;	/* user buffer copy out address */
	size_t *oldlenp = &req->oldlen;	/* user buffer copy out size */
//	user_addr_t newp = req->newptr;	/* user buffer copy in address */
//	size_t newlen = req->newlen;	/* user buffer copy in size */
	int error;

	error =  sysctl_procargsx( name, namelen, oldp, oldlenp, current_proc(), 0);

	/* adjust index so we return the right required/consumed amount */
	if (!error)
		req->oldidx += req->oldlen;

	return (error);
}
SYSCTL_PROC(_kern, KERN_PROCARGS, procargs, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	0,			/* Integer argument (arg2) */
	sysctl_doprocargs,	/* Handler function */
	NULL,			/* Data pointer */
	"");
#endif	/* !CONFIG_EMBEDDED */

STATIC int
sysctl_doprocargs2 SYSCTL_HANDLER_ARGS
{
	__unused int cmd = oidp->oid_arg2;	/* subcommand*/
	int *name = arg1;		/* oid element argument vector */
	int namelen = arg2;		/* number of oid element arguments */
	user_addr_t oldp = req->oldptr;	/* user buffer copy out address */
	size_t *oldlenp = &req->oldlen;	/* user buffer copy out size */
//	user_addr_t newp = req->newptr;	/* user buffer copy in address */
//	size_t newlen = req->newlen;	/* user buffer copy in size */
	int error;

	error = sysctl_procargsx( name, namelen, oldp, oldlenp, current_proc(), 1);

	/* adjust index so we return the right required/consumed amount */
	if (!error)
		req->oldidx += req->oldlen;

	return (error);
}
SYSCTL_PROC(_kern, KERN_PROCARGS2, procargs2, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED,
	0,			/* Pointer argument (arg1) */
	0,			/* Integer argument (arg2) */
	sysctl_doprocargs2,	/* Handler function */
	NULL,			/* Data pointer */
	"");

STATIC int
sysctl_procargsx(int *name, u_int namelen, user_addr_t where, 
                 size_t *sizep, proc_t cur_proc, int argc_yes)
{
	proc_t p;
	int buflen = where != USER_ADDR_NULL ? *sizep : 0;
	int error = 0;
	struct _vm_map *proc_map;
	struct task * task;
	vm_map_copy_t	tmp;
	user_addr_t	arg_addr;
	size_t		arg_size;
	caddr_t data;
	size_t argslen=0;
	int size;
	vm_offset_t	copy_start, copy_end;
	kern_return_t ret;
	int pid;
	kauth_cred_t my_cred;
	uid_t uid;
	int argc = -1;

	if ( namelen < 1 )
		return(EINVAL);
	
	if (argc_yes)
		buflen -= sizeof(int);		/* reserve first word to return argc */

	/* we only care about buflen when where (oldp from sysctl) is not NULL. */
	/* when where (oldp from sysctl) is NULL and sizep (oldlenp from sysctl */
	/* is not NULL then the caller wants us to return the length needed to */
	/* hold the data we would return */ 
	if (where != USER_ADDR_NULL && (buflen <= 0 || buflen > ARG_MAX)) {
		return(EINVAL);
	}
	arg_size = buflen;

	/*
	 *	Lookup process by pid
	 */
	pid = name[0];
	p = proc_find(pid);
	if (p == NULL) {
		return(EINVAL);
	}

	/*
	 *	Copy the top N bytes of the stack.
	 *	On all machines we have so far, the stack grows
	 *	downwards.
	 *
	 *	If the user expects no more than N bytes of
	 *	argument list, use that as a guess for the
	 *	size.
	 */

	if (!p->user_stack) {
		proc_rele(p);
		return(EINVAL);
	}

	if (where == USER_ADDR_NULL) {
		/* caller only wants to know length of proc args data */
		if (sizep == NULL) {
			proc_rele(p);
			return(EFAULT);
		}

		size = p->p_argslen;
		proc_rele(p);
		if (argc_yes) {
			size += sizeof(int);
		} else {
			/*
			 * old PROCARGS will return the executable's path and plus some
			 * extra space for work alignment and data tags
			 */
			size += PATH_MAX + (6 * sizeof(int));
		}
		size += (size & (sizeof(int) - 1)) ? (sizeof(int) - (size & (sizeof(int) - 1))) : 0;
		*sizep = size;
		return (0);
	}

	my_cred = kauth_cred_proc_ref(p);
	uid = kauth_cred_getuid(my_cred);
	kauth_cred_unref(&my_cred);

	if ((uid != kauth_cred_getuid(kauth_cred_get())) 
		&& suser(kauth_cred_get(), &cur_proc->p_acflag)) {
		proc_rele(p);
		return (EINVAL);
	}

	if ((u_int)arg_size > p->p_argslen)
	        arg_size = round_page(p->p_argslen);

	arg_addr = p->user_stack - arg_size;

	/*
	 *	Before we can block (any VM code), make another
	 *	reference to the map to keep it alive.  We do
	 *	that by getting a reference on the task itself.
	 */
	task = p->task;
	if (task == NULL) {
		proc_rele(p);
		return(EINVAL);
	}

	/* save off argc before releasing the proc */
	argc = p->p_argc;

	argslen = p->p_argslen;
	/*
	 * Once we have a task reference we can convert that into a
	 * map reference, which we will use in the calls below.  The
	 * task/process may change its map after we take this reference
	 * (see execve), but the worst that will happen then is a return
	 * of stale info (which is always a possibility).
	 */
	task_reference(task);
	proc_rele(p);
	proc_map = get_task_map_reference(task);
	task_deallocate(task);
	
	if (proc_map == NULL)
		return(EINVAL);


	ret = kmem_alloc(kernel_map, &copy_start, round_page(arg_size), VM_KERN_MEMORY_BSD);
	if (ret != KERN_SUCCESS) {
		vm_map_deallocate(proc_map);
		return(ENOMEM);
	}

	copy_end = round_page(copy_start + arg_size);

	if( vm_map_copyin(proc_map, (vm_map_address_t)arg_addr, 
			  (vm_map_size_t)arg_size, FALSE, &tmp) != KERN_SUCCESS) {
			vm_map_deallocate(proc_map);
			kmem_free(kernel_map, copy_start,
					round_page(arg_size));
			return (EIO);
	}

	/*
	 *	Now that we've done the copyin from the process'
	 *	map, we can release the reference to it.
	 */
	vm_map_deallocate(proc_map);

	if( vm_map_copy_overwrite(kernel_map, 
				  (vm_map_address_t)copy_start, 
				  tmp, FALSE) != KERN_SUCCESS) {
			kmem_free(kernel_map, copy_start,
					round_page(arg_size));
			vm_map_copy_discard(tmp);
			return (EIO);
	}

	if (arg_size > argslen) {
		data = (caddr_t) (copy_end - argslen);
		size = argslen;
	} else {
		data = (caddr_t) (copy_end - arg_size);
		size = arg_size;
	}

	/*
	 * When these sysctls were introduced, the first string in the strings
	 * section was just the bare path of the executable.  However, for security
	 * reasons we now prefix this string with executable_path= so it can be
	 * parsed getenv style.  To avoid binary compatability issues with exising
	 * callers of this sysctl, we strip it off here if present.
	 * (rdar://problem/13746466)
	 */
#define        EXECUTABLE_KEY "executable_path="
	if (strncmp(EXECUTABLE_KEY, data, strlen(EXECUTABLE_KEY)) == 0){
		data += strlen(EXECUTABLE_KEY);
		size -= strlen(EXECUTABLE_KEY);
	}

	if (argc_yes) {
		/* Put processes argc as the first word in the copyout buffer */
		suword(where, argc);
		error = copyout(data, (where + sizeof(int)), size);
		size += sizeof(int);
	} else {
		error = copyout(data, where, size);

		/*
		 * Make the old PROCARGS work to return the executable's path
		 * But, only if there is enough space in the provided buffer
		 *
		 * on entry: data [possibily] points to the beginning of the path 
		 * 
		 * Note: we keep all pointers&sizes aligned to word boundries
		 */
		if ( (! error) && (buflen > 0 && (u_int)buflen > argslen) )
		{
			int binPath_sz, alignedBinPath_sz = 0;
			int extraSpaceNeeded, addThis;
			user_addr_t placeHere;
			char * str = (char *) data;
			int max_len = size;

			/* Some apps are really bad about messing up their stacks
			   So, we have to be extra careful about getting the length
			   of the executing binary.  If we encounter an error, we bail.
			*/

			/* Limit ourselves to PATH_MAX paths */
			if ( max_len > PATH_MAX ) max_len = PATH_MAX;

			binPath_sz = 0;

			while ( (binPath_sz < max_len-1) && (*str++ != 0) )
				binPath_sz++;

			/* If we have a NUL terminator, copy it, too */
			if (binPath_sz < max_len-1) binPath_sz += 1;

			/* Pre-Flight the space requiremnts */

			/* Account for the padding that fills out binPath to the next word */
			alignedBinPath_sz += (binPath_sz & (sizeof(int)-1)) ? (sizeof(int)-(binPath_sz & (sizeof(int)-1))) : 0;

			placeHere = where + size;

			/* Account for the bytes needed to keep placeHere word aligned */ 
			addThis = (placeHere & (sizeof(int)-1)) ? (sizeof(int)-(placeHere & (sizeof(int)-1))) : 0;

			/* Add up all the space that is needed */
			extraSpaceNeeded = alignedBinPath_sz + addThis + binPath_sz + (4 * sizeof(int));

			/* is there is room to tack on argv[0]? */
			if ( (buflen & ~(sizeof(int)-1)) >= ( argslen + extraSpaceNeeded ))
			{
				placeHere += addThis;
				suword(placeHere, 0);
				placeHere += sizeof(int);
				suword(placeHere, 0xBFFF0000);
				placeHere += sizeof(int);
				suword(placeHere, 0);
				placeHere += sizeof(int);
				error = copyout(data, placeHere, binPath_sz);
				if ( ! error )
				{
					placeHere += binPath_sz;
					suword(placeHere, 0);
					size += extraSpaceNeeded;
				}
			}
		}
	}

	if (copy_start != (vm_offset_t) 0) {
		kmem_free(kernel_map, copy_start, copy_end - copy_start);
	}
	if (error) {
		return(error);
	}

	if (where != USER_ADDR_NULL)
		*sizep = size;
	return (0);
}


/*
 * Max number of concurrent aio requests
 */
STATIC int
sysctl_aiomax
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, changed;
	int error = sysctl_io_number(req, aio_max_requests, sizeof(int), &new_value, &changed);
	if (changed) {
		 /* make sure the system-wide limit is greater than the per process limit */
		if (new_value >= aio_max_requests_per_process && new_value <= AIO_MAX_REQUESTS)
			aio_max_requests = new_value;
		else
			error = EINVAL;
	}
	return(error);
}


/*
 * Max number of concurrent aio requests per process
 */
STATIC int
sysctl_aioprocmax
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, changed;
	int error = sysctl_io_number(req, aio_max_requests_per_process, sizeof(int), &new_value, &changed);
	if (changed) {
		/* make sure per process limit is less than the system-wide limit */
		if (new_value <= aio_max_requests && new_value >= AIO_LISTIO_MAX)
			aio_max_requests_per_process = new_value;
		else
			error = EINVAL;
	}
	return(error);
}


/*
 * Max number of async IO worker threads
 */
STATIC int
sysctl_aiothreads
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, changed;
	int error = sysctl_io_number(req, aio_worker_threads, sizeof(int), &new_value, &changed);
	if (changed) {
		/* we only allow an increase in the number of worker threads */
	        if (new_value > aio_worker_threads ) {
		        _aio_create_worker_threads((new_value - aio_worker_threads));
			aio_worker_threads = new_value;
		}
		else
		        error = EINVAL;
	}
	return(error);
}


/*
 * System-wide limit on the max number of processes
 */
STATIC int
sysctl_maxproc
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, changed;
	int error = sysctl_io_number(req, maxproc, sizeof(int), &new_value, &changed);
	if (changed) {
		AUDIT_ARG(value32, new_value);
		/* make sure the system-wide limit is less than the configured hard
		   limit set at kernel compilation */
		if (new_value <= hard_maxproc && new_value > 0)
			maxproc = new_value;
		else
			error = EINVAL;
	}
	return(error);
}

SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		ostype, 0, "");
SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		osrelease, 0, "");
SYSCTL_INT(_kern, KERN_OSREV, osrevision, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, BSD, "");
SYSCTL_STRING(_kern, KERN_VERSION, version, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		version, 0, "");
SYSCTL_STRING(_kern, OID_AUTO, uuid, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		&kernel_uuid_string[0], 0, "");

#if DEBUG
int debug_kprint_syscall = 0;
char debug_kprint_syscall_process[MAXCOMLEN+1];

/* Thread safe: bits and string value are not used to reclaim state */
SYSCTL_INT (_debug, OID_AUTO, kprint_syscall,
	    CTLFLAG_RW | CTLFLAG_LOCKED, &debug_kprint_syscall, 0, "kprintf syscall tracing");
SYSCTL_STRING(_debug, OID_AUTO, kprint_syscall_process, 
			  CTLFLAG_RW | CTLFLAG_LOCKED, debug_kprint_syscall_process, sizeof(debug_kprint_syscall_process),
			  "name of process for kprintf syscall tracing");

int debug_kprint_current_process(const char **namep)
{
	struct proc *p = current_proc();

	if (p == NULL) {
		return 0;
	}

	if (debug_kprint_syscall_process[0]) {
		/* user asked to scope tracing to a particular process name */
		if(0 == strncmp(debug_kprint_syscall_process,
						p->p_comm, sizeof(debug_kprint_syscall_process))) {
			/* no value in telling the user that we traced what they asked */
			if(namep) *namep = NULL;

			return 1;
		} else {
			return 0;
		}
	}

	/* trace all processes. Tell user what we traced */
	if (namep) {
		*namep = p->p_comm;
	}

	return 1;
}
#endif

/* PR-5293665: need to use a callback function for kern.osversion to set
 * osversion in IORegistry */

STATIC int
sysctl_osversion(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
    int rval = 0;

    rval = sysctl_handle_string(oidp, arg1, arg2, req);

    if (req->newptr) {
        IORegistrySetOSBuildVersion((char *)arg1); 
    }

    return rval;
}

SYSCTL_PROC(_kern, KERN_OSVERSION, osversion,
        CTLFLAG_RW | CTLFLAG_KERN | CTLTYPE_STRING | CTLFLAG_LOCKED,
        osversion, 256 /* OSVERSIZE*/, 
        sysctl_osversion, "A", "");

static uint64_t osvariant_status = 0;

STATIC int
sysctl_osvariant_status(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
	if (req->newptr != 0) {
		/*
		 * Can only ever be set by launchd, and only once at boot.
		 */
		if (req->p->p_pid != 1 || osvariant_status != 0) {
			return EPERM;
		}
	}

    return sysctl_handle_quad(oidp, arg1, arg2, req);
}

SYSCTL_PROC(_kern, OID_AUTO, osvariant_status,
        CTLFLAG_RW | CTLTYPE_QUAD | CTLFLAG_LOCKED | CTLFLAG_MASKED,
        &osvariant_status, sizeof(osvariant_status),
        sysctl_osvariant_status, "Q", "Opaque flags used to cache OS variant information");

STATIC int
sysctl_sysctl_bootargs
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int error;
	/* BOOT_LINE_LENGTH */
#if CONFIG_EMBEDDED
	size_t boot_args_len = 256;
#else
	size_t boot_args_len = 1024;
#endif
	char buf[boot_args_len];

	strlcpy(buf, PE_boot_args(), boot_args_len);
	error = sysctl_io_string(req, buf, boot_args_len, 0, NULL);
	return(error);
}

SYSCTL_PROC(_kern, OID_AUTO, bootargs,
	CTLFLAG_LOCKED | CTLFLAG_RD | CTLFLAG_KERN | CTLTYPE_STRING,
	NULL, 0,
	sysctl_sysctl_bootargs, "A", "bootargs");

SYSCTL_INT(_kern, KERN_MAXFILES, maxfiles, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&maxfiles, 0, "");
SYSCTL_INT(_kern, KERN_ARGMAX, argmax, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, ARG_MAX, "");
SYSCTL_INT(_kern, KERN_POSIX1, posix1version, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, _POSIX_VERSION, "");
SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, NGROUPS_MAX, "");
SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, 1, "");
#if 1	/* _POSIX_SAVED_IDS from <unistd.h> */
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		(int *)NULL, 1, "");
#else
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, 
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, 
		NULL, 0, "");
#endif
SYSCTL_INT(_kern, OID_AUTO, num_files, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		&nfiles, 0, "");
SYSCTL_COMPAT_INT(_kern, OID_AUTO, num_vnodes, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		&numvnodes, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_tasks, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		&task_max, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_threads, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		&thread_max, 0, "");
SYSCTL_INT(_kern, OID_AUTO, num_taskthreads, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		&task_threadmax, 0, "");

STATIC int
sysctl_maxvnodes (__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int oldval = desiredvnodes;
	int error = sysctl_io_number(req, desiredvnodes, sizeof(int), &desiredvnodes, NULL);

	if (oldval != desiredvnodes) {
		resize_namecache(desiredvnodes);
	}

	return(error);
}

SYSCTL_INT(_kern, OID_AUTO, namecache_disabled, 
		CTLFLAG_RW | CTLFLAG_LOCKED, 
		&nc_disabled, 0, ""); 

SYSCTL_PROC(_kern, KERN_MAXVNODES, maxvnodes,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_maxvnodes, "I", "");

SYSCTL_PROC(_kern, KERN_MAXPROC, maxproc,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_maxproc, "I", "");

SYSCTL_PROC(_kern, KERN_AIOMAX, aiomax,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_aiomax, "I", "");

SYSCTL_PROC(_kern, KERN_AIOPROCMAX, aioprocmax,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_aioprocmax, "I", "");

SYSCTL_PROC(_kern, KERN_AIOTHREADS, aiothreads,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_aiothreads, "I", "");

#if (DEVELOPMENT || DEBUG)
extern int sched_smt_balance;
SYSCTL_INT(_kern, OID_AUTO, sched_smt_balance, 
               CTLFLAG_KERN| CTLFLAG_RW| CTLFLAG_LOCKED, 
               &sched_smt_balance, 0, "");
#if __arm__ || __arm64__
extern uint32_t perfcontrol_requested_recommended_cores;
SYSCTL_UINT(_kern, OID_AUTO, sched_recommended_cores,
               CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED,
               &perfcontrol_requested_recommended_cores, 0, "");

/* Scheduler perfcontrol callouts sysctls */
SYSCTL_DECL(_kern_perfcontrol_callout);
SYSCTL_NODE(_kern, OID_AUTO, perfcontrol_callout, CTLFLAG_RW | CTLFLAG_LOCKED, 0,
	"scheduler perfcontrol callouts");

extern int perfcontrol_callout_stats_enabled;
SYSCTL_INT(_kern_perfcontrol_callout, OID_AUTO, stats_enabled, 
               CTLFLAG_KERN| CTLFLAG_RW| CTLFLAG_LOCKED, 
               &perfcontrol_callout_stats_enabled, 0, "");

extern uint64_t perfcontrol_callout_stat_avg(perfcontrol_callout_type_t type,
	perfcontrol_callout_stat_t stat);

/* On-Core Callout */
STATIC int
sysctl_perfcontrol_callout_stat
(__unused struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
{
	perfcontrol_callout_stat_t stat = (perfcontrol_callout_stat_t)arg1;
	perfcontrol_callout_type_t type = (perfcontrol_callout_type_t)arg2;
	return sysctl_io_number(req, (int)perfcontrol_callout_stat_avg(type, stat),
		sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, oncore_instr,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_ON_CORE,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, oncore_cycles,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_ON_CORE,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, offcore_instr,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_OFF_CORE,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, offcore_cycles,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_OFF_CORE,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, context_instr,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_CONTEXT,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, context_cycles,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_CONTEXT,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, update_instr,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_INSTRS, PERFCONTROL_CALLOUT_STATE_UPDATE,
		sysctl_perfcontrol_callout_stat, "I", "");
SYSCTL_PROC(_kern_perfcontrol_callout, OID_AUTO, update_cycles,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *)PERFCONTROL_STAT_CYCLES, PERFCONTROL_CALLOUT_STATE_UPDATE,
		sysctl_perfcontrol_callout_stat, "I", "");

#endif /* __arm__ || __arm64__ */
#endif /* (DEVELOPMENT || DEBUG) */

STATIC int
sysctl_securelvl
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, changed;
	int error = sysctl_io_number(req, securelevel, sizeof(int), &new_value, &changed);
	if (changed) {
		if (!(new_value < securelevel && req->p->p_pid != 1)) {
			proc_list_lock();
			securelevel = new_value;
			proc_list_unlock();
		} else {
			error = EPERM;
		}
	}
	return(error);
}

SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_securelvl, "I", "");


STATIC int
sysctl_domainname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int error, changed;
	error = sysctl_io_string(req, domainname, sizeof(domainname), 0, &changed);
	if (changed) {
		domainnamelen = strlen(domainname);
	}
	return(error);
}

SYSCTL_PROC(_kern, KERN_DOMAINNAME, nisdomainname,
		CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_domainname, "A", "");

SYSCTL_COMPAT_INT(_kern, KERN_HOSTID, hostid, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&hostid, 0, "");

STATIC int
sysctl_hostname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int error, changed;
	error = sysctl_io_string(req, hostname, sizeof(hostname), 1, &changed);
	if (changed) {
		hostnamelen = req->newlen;
	}
	return(error);
}


SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
		CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_hostname, "A", "");

STATIC int
sysctl_procname
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	/* Original code allowed writing, I'm copying this, although this all makes
	   no sense to me. Besides, this sysctl is never used. */
	return sysctl_io_string(req, &req->p->p_name[0], (2*MAXCOMLEN+1), 1, NULL);
}

SYSCTL_PROC(_kern, KERN_PROCNAME, procname,
		CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
		0, 0, sysctl_procname, "A", "");

SYSCTL_INT(_kern, KERN_SPECULATIVE_READS, speculative_reads_disabled, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&speculative_reads_disabled, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, preheat_max_bytes, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&preheat_max_bytes, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, preheat_min_bytes, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&preheat_min_bytes, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, speculative_prefetch_max, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&speculative_prefetch_max, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, speculative_prefetch_max_iosize, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&speculative_prefetch_max_iosize, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_target,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_free_target, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_min,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_free_min, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_free_reserved,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_free_reserved, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_speculative_percentage,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_speculative_percentage, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_page_speculative_q_age_ms,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_speculative_q_age_ms, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_max_delayed_work_limit,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_max_delayed_work_limit, 0, "");

SYSCTL_UINT(_kern, OID_AUTO, vm_max_batch,
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_max_batch, 0, "");

SYSCTL_STRING(_kern, OID_AUTO, bootsessionuuid,
		CTLFLAG_RD | CTLFLAG_LOCKED,
		&bootsessionuuid_string, sizeof(bootsessionuuid_string) , ""); 

STATIC int
sysctl_boottime
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	struct timeval tv;
	boottime_timeval(&tv);
	struct proc *p = req->p;

	if (proc_is64bit(p)) {
		struct user64_timeval t = {};
		t.tv_sec = tv.tv_sec;
		t.tv_usec = tv.tv_usec;
		return sysctl_io_opaque(req, &t, sizeof(t), NULL);
	} else {
		struct user32_timeval t = {};
		t.tv_sec = tv.tv_sec;
		t.tv_usec = tv.tv_usec;
		return sysctl_io_opaque(req, &t, sizeof(t), NULL);
	}
}

SYSCTL_PROC(_kern, KERN_BOOTTIME, boottime,
		CTLTYPE_STRUCT | CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_boottime, "S,timeval", "");

STATIC int
sysctl_symfile
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	char *str;
	int error = get_kernel_symfile(req->p, &str);
	if (error)
		return (error);
	return sysctl_io_string(req, str, 0, 0, NULL);
}


SYSCTL_PROC(_kern, KERN_SYMFILE, symfile,
		CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_symfile, "A", "");

#if NFSCLIENT
STATIC int
sysctl_netboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, netboot_root(), sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_NETBOOT, netboot,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_netboot, "I", "");
#endif

#ifdef CONFIG_IMGSRC_ACCESS
/*
 * Legacy--act as if only one layer of nesting is possible.
 */
STATIC int
sysctl_imgsrcdev 
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	vfs_context_t ctx = vfs_context_current();
	vnode_t devvp;
	int result;

	if (!vfs_context_issuser(ctx)) {
		return EPERM;
	}    

	if (imgsrc_rootvnodes[0] == NULL) {
		return ENOENT;
	}    

	result = vnode_getwithref(imgsrc_rootvnodes[0]);
	if (result != 0) {
		return result;
	}
	
	devvp = vnode_mount(imgsrc_rootvnodes[0])->mnt_devvp;
	result = vnode_getwithref(devvp);
	if (result != 0) {
		goto out;
	}

	result = sysctl_io_number(req, vnode_specrdev(devvp), sizeof(dev_t), NULL, NULL);

	vnode_put(devvp);
out:
	vnode_put(imgsrc_rootvnodes[0]);
	return result;
}

SYSCTL_PROC(_kern, OID_AUTO, imgsrcdev,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_imgsrcdev, "I", ""); 

STATIC int
sysctl_imgsrcinfo
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int error;
	struct imgsrc_info info[MAX_IMAGEBOOT_NESTING] = {};	/* 2 for now, no problem */
	uint32_t i;
	vnode_t rvp, devvp;

	if (imgsrc_rootvnodes[0] == NULLVP) {
		return ENXIO;
	}

	for (i = 0; i < MAX_IMAGEBOOT_NESTING; i++) {
		/*
		 * Go get the root vnode.
		 */
		rvp = imgsrc_rootvnodes[i];
		if (rvp == NULLVP) {
			break;
		}

		error = vnode_get(rvp);
		if (error != 0) {
			return error;
		}

		/* 
		 * For now, no getting at a non-local volume.
		 */
		devvp = vnode_mount(rvp)->mnt_devvp;
		if (devvp == NULL) {
			vnode_put(rvp);
			return EINVAL;	
		}

		error = vnode_getwithref(devvp);
		if (error != 0) {
			vnode_put(rvp);
			return error;
		}

		/*
		 * Fill in info.
		 */
		info[i].ii_dev = vnode_specrdev(devvp);
		info[i].ii_flags = 0;
		info[i].ii_height = i;
		bzero(info[i].ii_reserved, sizeof(info[i].ii_reserved));

		vnode_put(devvp);
		vnode_put(rvp);
	}

	return sysctl_io_opaque(req, info, i * sizeof(info[0]), NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, imgsrcinfo,
		CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_imgsrcinfo, "I", ""); 

#endif /* CONFIG_IMGSRC_ACCESS */


SYSCTL_DECL(_kern_timer);
SYSCTL_NODE(_kern, OID_AUTO, timer, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "timer");


SYSCTL_INT(_kern_timer, OID_AUTO, coalescing_enabled, 
		CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
		&mach_timer_coalescing_enabled, 0, "");

SYSCTL_QUAD(_kern_timer, OID_AUTO, deadline_tracking_bin_1,
		CTLFLAG_RW | CTLFLAG_LOCKED,
		&timer_deadline_tracking_bin_1, "");
SYSCTL_QUAD(_kern_timer, OID_AUTO, deadline_tracking_bin_2,
		CTLFLAG_RW | CTLFLAG_LOCKED,
		&timer_deadline_tracking_bin_2, "");

SYSCTL_DECL(_kern_timer_longterm);
SYSCTL_NODE(_kern_timer, OID_AUTO, longterm, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "longterm");


/* Must match definition in osfmk/kern/timer_call.c */
enum {
	THRESHOLD, QCOUNT,
	ENQUEUES, DEQUEUES, ESCALATES, SCANS, PREEMPTS,
	LATENCY, LATENCY_MIN, LATENCY_MAX, SCAN_LIMIT, PAUSES
};
extern uint64_t	timer_sysctl_get(int);
extern int      timer_sysctl_set(int, uint64_t);

STATIC int
sysctl_timer
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int		oid = (int)arg1;
	uint64_t	value = timer_sysctl_get(oid);
	uint64_t	new_value;
	int		error;
	int		changed;

	error = sysctl_io_number(req, value, sizeof(value), &new_value, &changed);
	if (changed)
		error = timer_sysctl_set(oid, new_value);

	return error;
}

SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, threshold,
		CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
		(void *) THRESHOLD, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scan_limit,
		CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
		(void *) SCAN_LIMIT, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, qlen,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) QCOUNT, 0, sysctl_timer, "Q", "");
#if  DEBUG
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, enqueues,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) ENQUEUES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, dequeues,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) DEQUEUES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, escalates,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) ESCALATES, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scans,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) SCANS, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, preempts,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) PREEMPTS, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) LATENCY, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency_min,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) LATENCY_MIN, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, latency_max,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) LATENCY_MAX, 0, sysctl_timer, "Q", "");
SYSCTL_PROC(_kern_timer_longterm, OID_AUTO, scan_pauses,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		(void *) PAUSES, 0, sysctl_timer, "Q", "");
#endif /* DEBUG */

STATIC int
sysctl_usrstack
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, (int)req->p->user_stack, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_USRSTACK32, usrstack,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_usrstack, "I", "");

STATIC int
sysctl_usrstack64
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, req->p->user_stack, sizeof(req->p->user_stack), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_USRSTACK64, usrstack64,
		CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_usrstack64, "Q", "");

#if CONFIG_COREDUMP

SYSCTL_STRING(_kern, KERN_COREFILE, corefile, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		corefilename, sizeof(corefilename), "");

STATIC int
sysctl_coredump
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
	(void)req;
	return (ENOTSUP);
#else
	int new_value, changed;
	int error = sysctl_io_number(req, do_coredump, sizeof(int), &new_value, &changed);
	if (changed) {
		if ((new_value == 0) || (new_value == 1))
			do_coredump = new_value;
		else
			error = EINVAL;
	}
	return(error);
#endif
}

SYSCTL_PROC(_kern, KERN_COREDUMP, coredump,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_coredump, "I", "");

STATIC int
sysctl_suid_coredump
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
	(void)req;
	return (ENOTSUP);
#else
	int new_value, changed;
	int error = sysctl_io_number(req, sugid_coredump, sizeof(int), &new_value, &changed);
	if (changed) {
		if ((new_value == 0) || (new_value == 1))
			sugid_coredump = new_value;
		else
			error = EINVAL;
	}
	return(error);
#endif
}

SYSCTL_PROC(_kern, KERN_SUGID_COREDUMP, sugid_coredump,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_suid_coredump, "I", "");

#endif /* CONFIG_COREDUMP */

STATIC int
sysctl_delayterm
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	struct proc *p = req->p;
	int new_value, changed;
	int error = sysctl_io_number(req, (req->p->p_lflag & P_LDELAYTERM)? 1: 0, sizeof(int), &new_value, &changed);
	if (changed) {
		proc_lock(p);
		if (new_value)
			req->p->p_lflag |=  P_LDELAYTERM;
		else
			req->p->p_lflag &=  ~P_LDELAYTERM;
		proc_unlock(p);
	}
	return(error);
}

SYSCTL_PROC(_kern, KERN_PROCDELAYTERM, delayterm,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
		0, 0, sysctl_delayterm, "I", "");


STATIC int
sysctl_rage_vnode
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	struct proc *p = req->p;
        struct  uthread *ut;
	int new_value, old_value, changed;
	int error;

	ut = get_bsdthread_info(current_thread());

	if (ut->uu_flag & UT_RAGE_VNODES)
	        old_value = KERN_RAGE_THREAD;
	else if (p->p_lflag & P_LRAGE_VNODES)
	        old_value = KERN_RAGE_PROC;
	else
	        old_value = 0;

	error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

	if (error == 0) {
	        switch (new_value) {
		case KERN_RAGE_PROC:
		        proc_lock(p);
			p->p_lflag |= P_LRAGE_VNODES;
			proc_unlock(p);
			break;
		case KERN_UNRAGE_PROC:
		        proc_lock(p);
			p->p_lflag &= ~P_LRAGE_VNODES;
			proc_unlock(p);
			break;

		case KERN_RAGE_THREAD:
			ut->uu_flag |= UT_RAGE_VNODES;
			break;
		case KERN_UNRAGE_THREAD:
		        ut = get_bsdthread_info(current_thread());
			ut->uu_flag &= ~UT_RAGE_VNODES;
			break;
		}
	}
	return(error);
}

SYSCTL_PROC(_kern, KERN_RAGEVNODE, rage_vnode,
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
		0, 0, sysctl_rage_vnode, "I", "");

/* XXX move this interface into libproc and remove this sysctl */
STATIC int
sysctl_setthread_cpupercent
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int new_value, old_value;
	int error = 0;
	kern_return_t kret = KERN_SUCCESS;
	uint8_t percent = 0;
	int ms_refill = 0;

	if (!req->newptr)
		return (0);

	old_value = 0;

	if ((error = sysctl_io_number(req, old_value, sizeof(old_value), &new_value, NULL)) != 0)
		return (error);

	percent = new_value & 0xff;			/* low 8 bytes for perent */
	ms_refill = (new_value >> 8) & 0xffffff;	/* upper 24bytes represent ms refill value */
	if (percent > 100)
		return (EINVAL);

	/*
	 * If the caller is specifying a percentage of 0, this will unset the CPU limit, if present.
	 */
	if ((kret = thread_set_cpulimit(THREAD_CPULIMIT_BLOCK, percent, ms_refill * (int)NSEC_PER_MSEC)) != 0)
		return (EIO);
	
	return (0);
}

SYSCTL_PROC(_kern, OID_AUTO, setthread_cpupercent,
		CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_ANYBODY,
		0, 0, sysctl_setthread_cpupercent, "I", "set thread cpu percentage limit");


STATIC int
sysctl_kern_check_openevt
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	struct proc *p = req->p;
	int new_value, old_value, changed;
	int error;

	if (p->p_flag & P_CHECKOPENEVT) {
		old_value = KERN_OPENEVT_PROC;
	} else {
	        old_value = 0;
	}

	error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

	if (error == 0) {
	        switch (new_value) {
		case KERN_OPENEVT_PROC:
			OSBitOrAtomic(P_CHECKOPENEVT, &p->p_flag);
			break;

		case KERN_UNOPENEVT_PROC:
			OSBitAndAtomic(~((uint32_t)P_CHECKOPENEVT), &p->p_flag);
			break;

		default:
			error = EINVAL;
		}
	}
	return(error);
}

SYSCTL_PROC(_kern, KERN_CHECKOPENEVT, check_openevt, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED,
            0, 0, sysctl_kern_check_openevt, "I", "set the per-process check-open-evt flag");



STATIC int
sysctl_nx
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
#ifdef SECURE_KERNEL
	(void)req;
	return ENOTSUP;
#else
	int new_value, changed;
	int error;

	error = sysctl_io_number(req, nx_enabled, sizeof(nx_enabled), &new_value, &changed);
	if (error)
		return error;

	if (changed) {
#if defined(__i386__) || defined(__x86_64__)
		/*
		 * Only allow setting if NX is supported on the chip
		 */
		if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD))
			return ENOTSUP;
#endif
		nx_enabled = new_value;
	}
	return(error);
#endif /* SECURE_KERNEL */
}



SYSCTL_PROC(_kern, KERN_NX_PROTECTION, nx, 
		CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		0, 0, sysctl_nx, "I", "");

STATIC int
sysctl_loadavg
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
		if (proc_is64bit(req->p)) {
			struct user64_loadavg loadinfo64 = {};
			fill_loadavg64(&averunnable, &loadinfo64);
			return sysctl_io_opaque(req, &loadinfo64, sizeof(loadinfo64), NULL);
		} else {
			struct user32_loadavg loadinfo32 = {};
			fill_loadavg32(&averunnable, &loadinfo32);
			return sysctl_io_opaque(req, &loadinfo32, sizeof(loadinfo32), NULL);
		}
}

SYSCTL_PROC(_vm, VM_LOADAVG, loadavg,
		CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_loadavg, "S,loadavg", "");

/*
 * Note:	Thread safe; vm_map_lock protects in  vm_toggle_entry_reuse()
 */
STATIC int
sysctl_vm_toggle_address_reuse(__unused struct sysctl_oid *oidp, __unused void *arg1,
	      __unused int arg2, struct sysctl_req *req)
{
	int old_value=0, new_value=0, error=0;
	
	if(vm_toggle_entry_reuse( VM_TOGGLE_GETVALUE, &old_value ))
		return(error);
	error = sysctl_io_number(req, old_value, sizeof(int), &new_value, NULL);
	if (!error) {
		return (vm_toggle_entry_reuse(new_value, NULL));
	}
	return(error);
}

SYSCTL_PROC(_debug, OID_AUTO, toggle_address_reuse, CTLFLAG_ANYBODY | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, 0, 0, sysctl_vm_toggle_address_reuse,"I","");


STATIC int
sysctl_swapusage
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
		int			error;
		uint64_t		swap_total;
		uint64_t		swap_avail;
		vm_size_t		swap_pagesize;
		boolean_t		swap_encrypted;
		struct xsw_usage	xsu = {};

		error = macx_swapinfo(&swap_total,
				      &swap_avail,
				      &swap_pagesize,
				      &swap_encrypted);
		if (error)
			return error;

		xsu.xsu_total = swap_total;
		xsu.xsu_avail = swap_avail;
		xsu.xsu_used = swap_total - swap_avail;
		xsu.xsu_pagesize = swap_pagesize;
		xsu.xsu_encrypted = swap_encrypted;
		return sysctl_io_opaque(req, &xsu, sizeof(xsu), NULL);
}



SYSCTL_PROC(_vm, VM_SWAPUSAGE, swapusage,
		CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_swapusage, "S,xsw_usage", "");

#if CONFIG_FREEZE
extern void vm_page_reactivate_all_throttled(void);

static int
sysctl_freeze_enabled SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
	int error, val = memorystatus_freeze_enabled ? 1 : 0;
	boolean_t disabled;

	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error || !req->newptr)
 		return (error);

	if (VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
		//assert(req->newptr);
		printf("Failed attempt to set vm.freeze_enabled sysctl\n");
		return EINVAL;
	}

	/* 
	 * If freeze is being disabled, we need to move dirty pages out from the throttle to the active queue. 
	 */
	disabled = (!val && memorystatus_freeze_enabled);
	
	memorystatus_freeze_enabled = val ? TRUE : FALSE;
	
	if (disabled) {
		vm_page_reactivate_all_throttled();
	}
	
	return (0);
}

SYSCTL_PROC(_vm, OID_AUTO, freeze_enabled, CTLTYPE_INT|CTLFLAG_RW, &memorystatus_freeze_enabled, 0, sysctl_freeze_enabled, "I", "");
#endif /* CONFIG_FREEZE */

/* this kernel does NOT implement shared_region_make_private_np() */
SYSCTL_INT(_kern, KERN_SHREG_PRIVATIZABLE, shreg_private, 
		CTLFLAG_RD | CTLFLAG_LOCKED, 
		(int *)NULL, 0, "");

STATIC int
fetch_process_cputype(
	proc_t cur_proc,
	int *name,
	u_int namelen,
	cpu_type_t *cputype)
{
	proc_t p = PROC_NULL;
	int refheld = 0;
	cpu_type_t ret = 0;
	int error = 0;
	
	if (namelen == 0)
		p = cur_proc;
	else if (namelen == 1) {
		p = proc_find(name[0]);
		if (p == NULL)
			return (EINVAL);
		refheld = 1;
	} else {
		error = EINVAL;
		goto out;
	}

	ret = cpu_type() & ~CPU_ARCH_MASK;
	if (IS_64BIT_PROCESS(p))
		ret |= CPU_ARCH_ABI64;

	*cputype = ret;
	
	if (refheld != 0)
		proc_rele(p);
out:
	return (error);
}

STATIC int
sysctl_sysctl_native(__unused struct sysctl_oid *oidp, void *arg1, int arg2,
		    struct sysctl_req *req)
{
	int error;
	cpu_type_t proc_cputype = 0;
	if ((error = fetch_process_cputype(req->p, (int *)arg1, arg2, &proc_cputype)) != 0)
		return error;
	int res = 1;
	if ((proc_cputype & ~CPU_ARCH_MASK) != (cpu_type() & ~CPU_ARCH_MASK))
		res = 0;
	return SYSCTL_OUT(req, &res, sizeof(res));
}	
SYSCTL_PROC(_sysctl, OID_AUTO, proc_native, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, sysctl_sysctl_native ,"I","proc_native");

STATIC int
sysctl_sysctl_cputype(__unused struct sysctl_oid *oidp, void *arg1, int arg2,
		     struct sysctl_req *req)
{
	int error;
	cpu_type_t proc_cputype = 0;
	if ((error = fetch_process_cputype(req->p, (int *)arg1, arg2, &proc_cputype)) != 0)
		return error;
	return SYSCTL_OUT(req, &proc_cputype, sizeof(proc_cputype));
}
SYSCTL_PROC(_sysctl, OID_AUTO, proc_cputype, CTLTYPE_NODE|CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, sysctl_sysctl_cputype ,"I","proc_cputype");

STATIC int
sysctl_safeboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, boothowto & RB_SAFEBOOT ? 1 : 0, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, KERN_SAFEBOOT, safeboot,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_safeboot, "I", "");

STATIC int
sysctl_singleuser
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, boothowto & RB_SINGLE ? 1 : 0, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, singleuser,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_singleuser, "I", "");

STATIC int sysctl_minimalboot
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	return sysctl_io_number(req, minimalboot, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, minimalboot,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_minimalboot, "I", "");

/*
 * Controls for debugging affinity sets - see osfmk/kern/affinity.c
 */
extern boolean_t	affinity_sets_enabled;
extern int		affinity_sets_mapping;

SYSCTL_INT (_kern, OID_AUTO, affinity_sets_enabled,
	    CTLFLAG_RW | CTLFLAG_LOCKED, (int *) &affinity_sets_enabled, 0, "hinting enabled");
SYSCTL_INT (_kern, OID_AUTO, affinity_sets_mapping,
	    CTLFLAG_RW | CTLFLAG_LOCKED, &affinity_sets_mapping, 0, "mapping policy");

/*
 * Boolean indicating if KASLR is active.
 */
STATIC int
sysctl_slide
(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	uint32_t	slide;

	slide = vm_kernel_slide ? 1 : 0;

	return sysctl_io_number( req, slide, sizeof(int), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, slide,
		CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
		0, 0, sysctl_slide, "I", "");

/*
 * Limit on total memory users can wire.
 *
 * vm_global_user_wire_limit - system wide limit on wired memory from all processes combined. 
 *
 * vm_user_wire_limit - per address space limit on wired memory.  This puts a cap on the process's rlimit value.
 *
 * These values are initialized to reasonable defaults at boot time based on the available physical memory in
 * kmem_init().
 *
 * All values are in bytes.
 */

vm_map_size_t	vm_global_no_user_wire_amount;
vm_map_size_t	vm_global_user_wire_limit;
vm_map_size_t	vm_user_wire_limit;

/*
 * There needs to be a more automatic/elegant way to do this
 */
#if defined(__ARM__)
SYSCTL_INT(_vm, OID_AUTO, global_no_user_wire_amount, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_no_user_wire_amount, 0, "");
SYSCTL_INT(_vm, OID_AUTO, global_user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_user_wire_limit, 0, "");
SYSCTL_INT(_vm, OID_AUTO, user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_user_wire_limit, 0, "");
#else
SYSCTL_QUAD(_vm, OID_AUTO, global_no_user_wire_amount, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_no_user_wire_amount, "");
SYSCTL_QUAD(_vm, OID_AUTO, global_user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_global_user_wire_limit, "");
SYSCTL_QUAD(_vm, OID_AUTO, user_wire_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_user_wire_limit, "");
#endif

extern int vm_map_copy_overwrite_aligned_src_not_internal;
extern int vm_map_copy_overwrite_aligned_src_not_symmetric;
extern int vm_map_copy_overwrite_aligned_src_large;
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_not_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_not_internal, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_not_symmetric, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_not_symmetric, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_copy_src_large, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_copy_overwrite_aligned_src_large, 0, "");


extern uint32_t	vm_page_external_count;
extern uint32_t	vm_page_filecache_min;

SYSCTL_INT(_vm, OID_AUTO, vm_page_external_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_external_count, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_filecache_min, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_filecache_min, 0, "");

extern int	vm_compressor_mode;
extern int	vm_compressor_is_active;
extern int	vm_compressor_available;
extern uint32_t	vm_ripe_target_age;
extern uint32_t	swapout_target_age;
extern int64_t  compressor_bytes_used;
extern int64_t  c_segment_input_bytes;
extern int64_t  c_segment_compressed_bytes;
extern uint32_t	compressor_eval_period_in_msecs;
extern uint32_t	compressor_sample_min_in_msecs;
extern uint32_t	compressor_sample_max_in_msecs;
extern uint32_t	compressor_thrashing_threshold_per_10msecs;
extern uint32_t	compressor_thrashing_min_per_10msecs;
extern uint32_t	vm_compressor_minorcompact_threshold_divisor;
extern uint32_t	vm_compressor_majorcompact_threshold_divisor;
extern uint32_t	vm_compressor_unthrottle_threshold_divisor;
extern uint32_t	vm_compressor_catchup_threshold_divisor;
extern uint32_t vm_compressor_time_thread;
#if DEVELOPMENT || DEBUG
extern vmct_stats_t vmct_stats;
#endif

SYSCTL_QUAD(_vm, OID_AUTO, compressor_input_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &c_segment_input_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &c_segment_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_bytes_used, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_bytes_used, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_mode, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_mode, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_is_active, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_is_active, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_swapout_target_age, CTLFLAG_RD | CTLFLAG_LOCKED, &swapout_target_age, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_available, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_compressor_available, 0, "");

SYSCTL_INT(_vm, OID_AUTO, vm_ripe_target_age_in_secs, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_ripe_target_age, 0, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_eval_period_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_eval_period_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_sample_min_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_sample_min_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_sample_max_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_sample_max_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thrashing_threshold_per_10msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_thrashing_threshold_per_10msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thrashing_min_per_10msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &compressor_thrashing_min_per_10msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_minorcompact_threshold_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_minorcompact_threshold_divisor, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_majorcompact_threshold_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_majorcompact_threshold_divisor, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_unthrottle_threshold_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_unthrottle_threshold_divisor, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_catchup_threshold_divisor, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_catchup_threshold_divisor, 0, "");

SYSCTL_STRING(_vm, OID_AUTO, swapfileprefix, CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED, swapfilename, sizeof(swapfilename) - SWAPFILENAME_INDEX_LEN, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_timing_enabled, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_time_thread, 0, "");

#if DEVELOPMENT || DEBUG
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_runtime0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_runtimes[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_runtime1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_runtimes[1], "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_threads_total, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_cthreads_total, "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_pages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_pages[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_pages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_pages[1], "");

SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_iterations0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_iterations[0], "");
SYSCTL_QUAD(_vm, OID_AUTO, compressor_thread_iterations1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_iterations[1], "");

SYSCTL_INT(_vm, OID_AUTO, compressor_thread_minpages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_minpages[0], 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thread_minpages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_minpages[1], 0, "");

SYSCTL_INT(_vm, OID_AUTO, compressor_thread_maxpages0, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_maxpages[0], 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_thread_maxpages1, CTLFLAG_RD | CTLFLAG_LOCKED, &vmct_stats.vmct_maxpages[1], 0, "");

#endif

SYSCTL_QUAD(_vm, OID_AUTO, lz4_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_wk_compression_delta, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_wk_compression_delta, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_wk_compression_negative_delta, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_wk_compression_negative_delta, "");

SYSCTL_QUAD(_vm, OID_AUTO, lz4_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_decompressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, lz4_decompressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.lz4_decompressed_bytes, "");

SYSCTL_QUAD(_vm, OID_AUTO, uc_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.uc_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_cabstime, "");

SYSCTL_QUAD(_vm, OID_AUTO, wkh_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_cabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wkh_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_catime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_cabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_compressions_exclusive, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressions_exclusive, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_sv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_sv_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_mzv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_mzv_compressions, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compressed_bytes_exclusive, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressed_bytes_exclusive, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_compressed_bytes_total, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_compressed_bytes_total, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_compressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_compression_failures, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_compression_failures, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_sv_compressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_sv_compressions, "");


SYSCTL_QUAD(_vm, OID_AUTO, wk_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_dabstime, "");

SYSCTL_QUAD(_vm, OID_AUTO, wkh_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_dabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wkh_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wkh_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wks_datime, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_dabstime, "");
SYSCTL_QUAD(_vm, OID_AUTO, wks_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wks_decompressions, "");

SYSCTL_QUAD(_vm, OID_AUTO, wk_decompressed_bytes, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_decompressed_bytes, "");
SYSCTL_QUAD(_vm, OID_AUTO, wk_sv_decompressions, CTLFLAG_RD | CTLFLAG_LOCKED, &compressor_stats.wk_sv_decompressions, "");

SYSCTL_INT(_vm, OID_AUTO, lz4_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, wkdm_reeval_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.wkdm_reeval_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_failure_skips, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_failure_skips, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_failure_run_length, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_failure_run_length, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_max_preselects, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_max_preselects, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_run_preselection_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_run_preselection_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_run_continue_bytes, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_run_continue_bytes, 0, "");
SYSCTL_INT(_vm, OID_AUTO, lz4_profitable_bytes, CTLFLAG_RW | CTLFLAG_LOCKED, &vmctune.lz4_profitable_bytes, 0, "");
#if DEVELOPMENT || DEBUG
extern int vm_compressor_current_codec;
extern int vm_compressor_test_seg_wp;
extern boolean_t vm_compressor_force_sw_wkdm;
SYSCTL_INT(_vm, OID_AUTO, compressor_codec, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_current_codec, 0, "");
SYSCTL_INT(_vm, OID_AUTO, compressor_test_wp, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_test_seg_wp, 0, "");

SYSCTL_INT(_vm, OID_AUTO, wksw_force, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_compressor_force_sw_wkdm, 0, "");
extern int precompy, wkswhw;

SYSCTL_INT(_vm, OID_AUTO, precompy, CTLFLAG_RW | CTLFLAG_LOCKED, &precompy, 0, "");
SYSCTL_INT(_vm, OID_AUTO, wkswhw, CTLFLAG_RW | CTLFLAG_LOCKED, &wkswhw, 0, "");
extern unsigned int vm_ktrace_enabled;
SYSCTL_INT(_vm, OID_AUTO, vm_ktrace, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_ktrace_enabled, 0, "");
#endif

#if CONFIG_PHANTOM_CACHE
extern uint32_t phantom_cache_thrashing_threshold;
extern uint32_t phantom_cache_eval_period_in_msecs;
extern uint32_t phantom_cache_thrashing_threshold_ssd;


SYSCTL_INT(_vm, OID_AUTO, phantom_cache_eval_period_in_msecs, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_eval_period_in_msecs, 0, "");
SYSCTL_INT(_vm, OID_AUTO, phantom_cache_thrashing_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_thrashing_threshold, 0, "");
SYSCTL_INT(_vm, OID_AUTO, phantom_cache_thrashing_threshold_ssd, CTLFLAG_RW | CTLFLAG_LOCKED, &phantom_cache_thrashing_threshold_ssd, 0, "");
#endif

#if CONFIG_BACKGROUND_QUEUE

extern uint32_t	vm_page_background_count;
extern uint32_t	vm_page_background_target;
extern uint32_t	vm_page_background_internal_count;
extern uint32_t	vm_page_background_external_count;
extern uint32_t	vm_page_background_mode;
extern uint32_t	vm_page_background_exclude_external;
extern uint64_t	vm_page_background_promoted_count;
extern uint64_t vm_pageout_considered_bq_internal;
extern uint64_t vm_pageout_considered_bq_external;
extern uint64_t vm_pageout_rejected_bq_internal;
extern uint64_t vm_pageout_rejected_bq_external;

SYSCTL_INT(_vm, OID_AUTO, vm_page_background_mode, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_mode, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_exclude_external, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_exclude_external, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_target, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_page_background_target, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_count, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_internal_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_internal_count, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_page_background_external_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_external_count, 0, "");

SYSCTL_QUAD(_vm, OID_AUTO, vm_page_background_promoted_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_background_promoted_count, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_considered_bq_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_considered_bq_internal, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_considered_bq_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_considered_bq_external, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_rejected_bq_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_rejected_bq_internal, "");
SYSCTL_QUAD(_vm, OID_AUTO, vm_pageout_rejected_bq_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_rejected_bq_external, "");

#endif

#if (DEVELOPMENT || DEBUG)

SYSCTL_UINT(_vm, OID_AUTO, vm_page_creation_throttled_hard,
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_creation_throttled_hard, 0, "");

SYSCTL_UINT(_vm, OID_AUTO, vm_page_creation_throttled_soft,
		CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&vm_page_creation_throttled_soft, 0, "");

extern uint32_t vm_pageout_memorystatus_fb_factor_nr;
extern uint32_t vm_pageout_memorystatus_fb_factor_dr;
SYSCTL_INT(_vm, OID_AUTO, vm_pageout_memorystatus_fb_factor_nr, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_memorystatus_fb_factor_nr, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_pageout_memorystatus_fb_factor_dr, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_pageout_memorystatus_fb_factor_dr, 0, "");

extern uint32_t vm_grab_anon_overrides;
extern uint32_t vm_grab_anon_nops;

SYSCTL_INT(_vm, OID_AUTO, vm_grab_anon_overrides, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_grab_anon_overrides, 0, "");
SYSCTL_INT(_vm, OID_AUTO, vm_grab_anon_nops, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_grab_anon_nops, 0, "");

/* log message counters for persistence mode */
extern uint32_t oslog_p_total_msgcount;
extern uint32_t oslog_p_metadata_saved_msgcount;
extern uint32_t oslog_p_metadata_dropped_msgcount;
extern uint32_t oslog_p_error_count;
extern uint32_t oslog_p_saved_msgcount;
extern uint32_t oslog_p_dropped_msgcount;
extern uint32_t oslog_p_boot_dropped_msgcount;

/* log message counters for streaming mode */
extern uint32_t oslog_s_total_msgcount;
extern uint32_t oslog_s_metadata_msgcount;
extern uint32_t oslog_s_error_count;
extern uint32_t oslog_s_streamed_msgcount;
extern uint32_t oslog_s_dropped_msgcount;

SYSCTL_UINT(_debug, OID_AUTO, oslog_p_total_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_total_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_metadata_saved_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_metadata_saved_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_metadata_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_metadata_dropped_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_error_count, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_error_count, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_saved_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_saved_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_dropped_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_p_boot_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_p_boot_dropped_msgcount, 0, "");

SYSCTL_UINT(_debug, OID_AUTO, oslog_s_total_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_total_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_metadata_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_metadata_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_error_count, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_error_count, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_streamed_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_streamed_msgcount, 0, "");
SYSCTL_UINT(_debug, OID_AUTO, oslog_s_dropped_msgcount, CTLFLAG_ANYBODY | CTLFLAG_RD | CTLFLAG_LOCKED, &oslog_s_dropped_msgcount, 0, "");


#endif /* DEVELOPMENT || DEBUG */

/*
 * Enable tracing of voucher contents
 */
extern uint32_t ipc_voucher_trace_contents;

SYSCTL_INT (_kern, OID_AUTO, ipc_voucher_trace_contents,
	    CTLFLAG_RW | CTLFLAG_LOCKED, &ipc_voucher_trace_contents, 0, "Enable tracing voucher contents");

/*
 * Kernel stack size and depth
 */
SYSCTL_INT (_kern, OID_AUTO, stack_size,
	    CTLFLAG_RD | CTLFLAG_LOCKED, (int *) &kernel_stack_size, 0, "Kernel stack size");
SYSCTL_INT (_kern, OID_AUTO, stack_depth_max,
	    CTLFLAG_RD | CTLFLAG_LOCKED, (int *) &kernel_stack_depth_max, 0, "Max kernel stack depth at interrupt or context switch");

extern unsigned int kern_feature_overrides;
SYSCTL_INT (_kern, OID_AUTO, kern_feature_overrides,
	    CTLFLAG_RD | CTLFLAG_LOCKED, &kern_feature_overrides, 0, "Kernel feature override mask");

/*
 * enable back trace for port allocations
 */
extern int ipc_portbt;

SYSCTL_INT(_kern, OID_AUTO, ipc_portbt, 
		CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_LOCKED,
		&ipc_portbt, 0, "");

/*
 * Scheduler sysctls
 */

SYSCTL_STRING(_kern, OID_AUTO, sched,
			  CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED,
			  sched_string, sizeof(sched_string),
			  "Timeshare scheduler implementation");

/*
 * Only support runtime modification on embedded platforms
 * with development config enabled
 */
#if CONFIG_EMBEDDED
#if !SECURE_KERNEL
extern int precise_user_kernel_time;
SYSCTL_INT(_kern, OID_AUTO, precise_user_kernel_time, 
		CTLFLAG_RW | CTLFLAG_LOCKED,
		&precise_user_kernel_time, 0, "Precise accounting of kernel vs. user time");
#endif
#endif


/* Parameters related to timer coalescing tuning, to be replaced
 * with a dedicated systemcall in the future.
 */
/* Enable processing pending timers in the context of any other interrupt
 * Coalescing tuning parameters for various thread/task attributes */
STATIC int
sysctl_timer_user_us_kernel_abstime SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp)
	int size = arg2;	/* subcommand*/
	int error;
	int changed = 0;
	uint64_t old_value_ns;
	uint64_t new_value_ns;
	uint64_t value_abstime;
	if (size == sizeof(uint32_t))
		value_abstime = *((uint32_t *)arg1);
	else if (size == sizeof(uint64_t))
		value_abstime = *((uint64_t *)arg1);
	else return ENOTSUP;

	absolutetime_to_nanoseconds(value_abstime, &old_value_ns);
	error = sysctl_io_number(req, old_value_ns, sizeof(old_value_ns), &new_value_ns, &changed);
	if ((error) || (!changed))
		return error;

	nanoseconds_to_absolutetime(new_value_ns, &value_abstime);
	if (size == sizeof(uint32_t))
		*((uint32_t *)arg1) = (uint32_t)value_abstime;
	else
		*((uint64_t *)arg1) = value_abstime;
	return error;
}

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_bg_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_bg_shift, 0, "");
SYSCTL_PROC(_kern, OID_AUTO, timer_resort_threshold_ns,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_resort_threshold_abstime,
    sizeof(tcoal_prio_params.timer_resort_threshold_abstime),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");
SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_bg_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_bg_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_bg_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_kt_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_kt_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_kt_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_kt_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_kt_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_fp_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_fp_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_fp_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_fp_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_fp_abstime_max), 
   sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_ts_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_ts_shift, 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_ts_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.timer_coalesce_ts_abstime_max,
    sizeof(tcoal_prio_params.timer_coalesce_ts_abstime_max),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier0_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[0], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier0_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[0],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[0]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier1_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[1], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier1_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[1],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[1]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier2_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[2], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier2_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[2],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[2]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier3_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[3], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier3_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[3],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[3]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier4_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[4], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier4_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[4],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[4]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

SYSCTL_INT(_kern, OID_AUTO, timer_coalesce_tier5_scale,
    CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_scale[5], 0, "");

SYSCTL_PROC(_kern, OID_AUTO, timer_coalesce_tier5_ns_max,
    CTLTYPE_QUAD | CTLFLAG_KERN | CTLFLAG_RW | CTLFLAG_LOCKED,
    &tcoal_prio_params.latency_qos_abstime_max[5],
    sizeof(tcoal_prio_params.latency_qos_abstime_max[5]),
    sysctl_timer_user_us_kernel_abstime,
    "Q", "");

/* Communicate the "user idle level" heuristic to the timer layer, and
 * potentially other layers in the future.
 */

static int
timer_user_idle_level(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req) {
	int new_value = 0, old_value = 0, changed = 0, error;

	old_value = timer_get_user_idle_level();

	error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed);

	if (error == 0 && changed) {
		if (timer_set_user_idle_level(new_value) != KERN_SUCCESS)
			error = ERANGE;
	}

	return error;
}

SYSCTL_PROC(_machdep, OID_AUTO, user_idle_level,
    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0,
    timer_user_idle_level, "I", "User idle level heuristic, 0-128");

#if HYPERVISOR
SYSCTL_INT(_kern, OID_AUTO, hv_support, 
		CTLFLAG_KERN | CTLFLAG_RD | CTLFLAG_LOCKED, 
		&hv_support_available, 0, "");
#endif

#if CONFIG_EMBEDDED
STATIC int
sysctl_darkboot SYSCTL_HANDLER_ARGS
{
	int err = 0, value = 0;
#pragma unused(oidp, arg1, arg2, err, value, req)

	/*
	 * Handle the sysctl request.
	 *
	 * If this is a read, the function will set the value to the current darkboot value. Otherwise,
	 * we'll get the request identifier into "value" and then we can honor it.
	 */
	if ((err = sysctl_io_number(req, darkboot, sizeof(int), &value, NULL)) != 0) {
		goto exit;
	}

	/* writing requested, let's process the request */
	if (req->newptr) {
		/* writing is protected by an entitlement */
		if (priv_check_cred(kauth_cred_get(), PRIV_DARKBOOT, 0) != 0) {
			err = EPERM;
			goto exit;
		}

		switch (value) {
		case MEMORY_MAINTENANCE_DARK_BOOT_UNSET:
			/*
			 * If the darkboot sysctl is unset, the NVRAM variable
			 * must be unset too. If that's not the case, it means
			 * someone is doing something crazy and not supported.
			 */
			if (darkboot != 0) {
				int ret = PERemoveNVRAMProperty(MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME);
				if (ret) {
					darkboot = 0;
				} else {
					err = EINVAL;
				}
			}
			break;
		case MEMORY_MAINTENANCE_DARK_BOOT_SET:
			darkboot = 1;
			break;
		case MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT: {
			/*
			 * Set the NVRAM and update 'darkboot' in case
			 * of success. Otherwise, do not update
			 * 'darkboot' and report the failure.
			 */
			if (PEWriteNVRAMBooleanProperty(MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME, TRUE)) {
				darkboot = 1;
			} else {
				err = EINVAL;
			}

			break;
		}
		default:
			err = EINVAL;
		}
	}

exit:
	return err;
}

SYSCTL_PROC(_kern, OID_AUTO, darkboot,
           CTLFLAG_KERN | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY,
           0, 0, sysctl_darkboot, "I", "");
#endif

/*
 * This is set by core audio to tell tailspin (ie background tracing) how long
 * its smallest buffer is.  Background tracing can then try to make a reasonable
 * decisions to try to avoid introducing so much latency that the buffers will
 * underflow.
 */

int min_audio_buffer_usec;

STATIC int
sysctl_audio_buffer SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
	int err = 0, value = 0, changed = 0;
	err = sysctl_io_number(req, min_audio_buffer_usec, sizeof(int), &value, &changed);
	if (err) goto exit;

	if (changed) {
		/* writing is protected by an entitlement */
		if (priv_check_cred(kauth_cred_get(), PRIV_AUDIO_LATENCY, 0) != 0) {
			err = EPERM;
			goto exit;
		}
		min_audio_buffer_usec = value;
	}
exit:
	return err;
}

SYSCTL_PROC(_kern, OID_AUTO, min_audio_buffer_usec, CTLFLAG_RW | CTLFLAG_ANYBODY, 0, 0, sysctl_audio_buffer, "I", "Minimum audio buffer size, in microseconds");

#if DEVELOPMENT || DEBUG
#include <sys/sysent.h>
/* This should result in a fatal exception, verifying that "sysent" is
 * write-protected.
 */
static int
kern_sysent_write(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req) {
	uint64_t new_value = 0, old_value = 0;
	int changed = 0, error;

	error = sysctl_io_number(req, old_value, sizeof(uint64_t), &new_value, &changed);
	if ((error == 0) && changed) {
		volatile uint32_t *wraddr = (uint32_t *) &sysent[0];
		*wraddr = 0;
		printf("sysent[0] write succeeded\n");
	}
	return error;
}

SYSCTL_PROC(_kern, OID_AUTO, sysent_const_check,
    CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
    0, 0,
    kern_sysent_write, "I", "Attempt sysent[0] write");

#endif

#if DEVELOPMENT || DEBUG
SYSCTL_COMPAT_INT(_kern, OID_AUTO, development, CTLFLAG_RD | CTLFLAG_MASKED, NULL, 1, "");
#else
SYSCTL_COMPAT_INT(_kern, OID_AUTO, development, CTLFLAG_RD | CTLFLAG_MASKED, NULL, 0, "");
#endif


#if DEVELOPMENT || DEBUG

static int
sysctl_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
    int rval = 0;
    char str[32] = "entry prelog postlog postcore";

    rval = sysctl_handle_string(oidp, str, sizeof(str), req);

    if (rval == 0 && req->newptr) {
        if (strncmp("entry", str, strlen("entry")) == 0) {
            panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_ENTRY, "test recursive panic at entry");
        } else if (strncmp("prelog", str, strlen("prelog")) == 0) {
            panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_PRELOG, "test recursive panic prior to writing a paniclog");
        } else if (strncmp("postlog", str, strlen("postlog")) == 0) {
            panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_POSTLOG, "test recursive panic subsequent to paniclog");
        } else if (strncmp("postcore", str, strlen("postcore")) == 0) {
            panic_with_options(0, NULL, DEBUGGER_OPTION_RECURPANIC_POSTCORE, "test recursive panic subsequent to on-device core");
        }
    }

    return rval;
}

static int
sysctl_debugger_test SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
    int rval = 0;
    char str[32] = "entry prelog postlog postcore";

    rval = sysctl_handle_string(oidp, str, sizeof(str), req);

    if (rval == 0 && req->newptr) {
        if (strncmp("entry", str, strlen("entry")) == 0) {
            DebuggerWithContext(0, NULL, "test recursive panic via debugger at entry", DEBUGGER_OPTION_RECURPANIC_ENTRY);
        } else if (strncmp("prelog", str, strlen("prelog")) == 0) {
            DebuggerWithContext(0, NULL, "test recursive panic via debugger prior to writing a paniclog", DEBUGGER_OPTION_RECURPANIC_PRELOG);
        } else if (strncmp("postlog", str, strlen("postlog")) == 0) {
            DebuggerWithContext(0, NULL, "test recursive panic via debugger subsequent to paniclog", DEBUGGER_OPTION_RECURPANIC_POSTLOG);
        } else if (strncmp("postcore", str, strlen("postcore")) == 0) {
            DebuggerWithContext(0, NULL, "test recursive panic via debugger subsequent to on-device core", DEBUGGER_OPTION_RECURPANIC_POSTCORE);
        }
    }

    return rval;
}

decl_lck_spin_data(, spinlock_panic_test_lock)

__attribute__((noreturn))
static void
spinlock_panic_test_acquire_spinlock(void * arg __unused, wait_result_t wres __unused)
{
	lck_spin_lock(&spinlock_panic_test_lock);
	while (1) { ; }
}

static int
sysctl_spinlock_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
	if (req->newlen == 0)
		return EINVAL;

	thread_t panic_spinlock_thread;
	/* Initialize panic spinlock */
	lck_grp_t * panic_spinlock_grp;
	lck_grp_attr_t * panic_spinlock_grp_attr;
	lck_attr_t * panic_spinlock_attr;

	panic_spinlock_grp_attr = lck_grp_attr_alloc_init();
	panic_spinlock_grp = lck_grp_alloc_init("panic_spinlock",  panic_spinlock_grp_attr);
	panic_spinlock_attr = lck_attr_alloc_init();

	lck_spin_init(&spinlock_panic_test_lock, panic_spinlock_grp, panic_spinlock_attr);


	/* Create thread to acquire spinlock */
	if (kernel_thread_start(spinlock_panic_test_acquire_spinlock, NULL, &panic_spinlock_thread) != KERN_SUCCESS) {
		return EBUSY;
	}

	/* Try to acquire spinlock -- should panic eventually */
	lck_spin_lock(&spinlock_panic_test_lock);
	while(1) { ; }
}

__attribute__((noreturn))
static void
simultaneous_panic_worker
(void * arg, wait_result_t wres __unused)
{
	atomic_int *start_panic = (atomic_int *)arg;

	while (!atomic_load(start_panic)) { ; }
	panic("SIMULTANEOUS PANIC TEST: INITIATING PANIC FROM CPU %d", cpu_number());
	__builtin_unreachable();
}

static int
sysctl_simultaneous_panic_test SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
	if (req->newlen == 0)
		return EINVAL;

	int i = 0, threads_to_create = 2 * processor_count;
	atomic_int start_panic = 0;
	unsigned int threads_created = 0;
	thread_t new_panic_thread;

	for (i = threads_to_create; i > 0; i--) {
		if (kernel_thread_start(simultaneous_panic_worker, (void *) &start_panic, &new_panic_thread) == KERN_SUCCESS) {
			threads_created++;
		}
	}

	/* FAIL if we couldn't create at least processor_count threads */
	if (threads_created < processor_count) {
		panic("SIMULTANEOUS PANIC TEST: FAILED TO CREATE ENOUGH THREADS, ONLY CREATED %d (of %d)",
				threads_created, threads_to_create);
	}

	atomic_exchange(&start_panic, 1);
	while (1) { ; }
}

SYSCTL_PROC(_debug, OID_AUTO, panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_panic_test, "A", "panic test");
SYSCTL_PROC(_debug, OID_AUTO, debugger_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_debugger_test, "A", "debugger test");
SYSCTL_PROC(_debug, OID_AUTO, spinlock_panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_spinlock_panic_test, "A", "spinlock panic test");
SYSCTL_PROC(_debug, OID_AUTO, simultaneous_panic_test, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_KERN | CTLFLAG_MASKED, 0, 0, sysctl_simultaneous_panic_test, "A", "simultaneous panic test");


#endif /* DEVELOPMENT || DEBUG */

const uint32_t thread_groups_supported = 0;

STATIC int
sysctl_thread_groups_supported (__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
	int value = thread_groups_supported;
        return sysctl_io_number(req, value, sizeof(value), NULL, NULL);
}

SYSCTL_PROC(_kern, OID_AUTO, thread_groups_supported, CTLFLAG_RD | CTLFLAG_LOCKED | CTLFLAG_KERN,
    0, 0, &sysctl_thread_groups_supported, "I", "thread groups supported");

static int
sysctl_grade_cputype SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2, oidp)
	int error = 0;
	int type_tuple[2] = {};
	int return_value = 0;

	error = SYSCTL_IN(req, &type_tuple, sizeof(type_tuple));

	if (error) {
		return error;
	}

	return_value = grade_binary(type_tuple[0], type_tuple[1]);

	error = SYSCTL_OUT(req, &return_value, sizeof(return_value));

	if (error) {
		return error;
	}

	return error;
}

SYSCTL_PROC(_kern, OID_AUTO, grade_cputype,
            CTLFLAG_RW|CTLFLAG_ANYBODY|CTLFLAG_MASKED|CTLFLAG_LOCKED|CTLTYPE_OPAQUE,
            0, 0, &sysctl_grade_cputype, "S",
            "grade value of cpu_type_t+cpu_sub_type_t");