xnu-1456.1.26.tar.gz

[apple/xnu.git] / bsd / vm / vm_unix.c

diff --git a/bsd/vm/vm_unix.c b/bsd/vm/vm_unix.c
index be634ec2bdc0f6283bf5d14fa9fb5058e7aa8381..8bb213b61faa61d9fe83001c341da3222b90b22a 100644 (file)
--- a/bsd/vm/vm_unix.c
+++ b/bsd/vm/vm_unix.c
@@ -1,16 +1,19 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, 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
  * 
  * 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /* 
  * Mach Operating System
  */
 /* 
  * Mach Operating System


@@ -28,67 +31,152 @@
  * All rights reserved.  The CMU software License Agreement specifies
  * the terms and conditions for use and redistribution.
  */
  * All rights reserved.  The CMU software License Agreement specifies
  * the terms and conditions for use and redistribution.
  */

-

 /*
 /*

+ * NOTICE: This file was modified by SPARTA, Inc. in 2006 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.

  */
 
  */
 

-

 #include <meta_features.h>
 
 #include <kern/task.h>
 #include <kern/thread.h>
 #include <kern/debug.h>
 #include <kern/lock.h>
 #include <meta_features.h>
 
 #include <kern/task.h>
 #include <kern/thread.h>
 #include <kern/debug.h>
 #include <kern/lock.h>

+#include <mach/mach_traps.h>
+#include <mach/port.h>
+#include <mach/task.h>
+#include <mach/task_access.h>
+#include <mach/task_special_ports.h>

 #include <mach/time_value.h>
 #include <mach/time_value.h>

+#include <mach/vm_map.h>

 #include <mach/vm_param.h>
 #include <mach/vm_prot.h>
 #include <mach/vm_param.h>
 #include <mach/vm_prot.h>

-#include <mach/port.h>

 
 

+#include <sys/file_internal.h>

 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/dir.h>
 #include <sys/namei.h>
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/dir.h>
 #include <sys/namei.h>

-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>

 #include <sys/vm.h>
 #include <sys/file.h>
 #include <sys/vm.h>
 #include <sys/file.h>

-#include <sys/vnode.h>
-#include <sys/buf.h>
+#include <sys/vnode_internal.h>

 #include <sys/mount.h>
 #include <sys/trace.h>
 #include <sys/kernel.h>
 #include <sys/mount.h>
 #include <sys/trace.h>
 #include <sys/kernel.h>

-#include <sys/ubc.h>
+#include <sys/ubc_internal.h>
+#include <sys/user.h>
+#include <sys/syslog.h>

 #include <sys/stat.h>
 #include <sys/stat.h>

+#include <sys/sysproto.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+
+#include <security/audit/audit.h>
+#include <bsm/audit_kevents.h>

 
 #include <kern/kalloc.h>
 #include <vm/vm_map.h>
 #include <vm/vm_kern.h>
 
 #include <kern/kalloc.h>
 #include <vm/vm_map.h>
 #include <vm/vm_kern.h>

+#include <vm/vm_pageout.h>

 
 #include <machine/spl.h>
 
 
 #include <machine/spl.h>
 

-#include <mach/shared_memory_server.h>
-#include <vm/vm_shared_memory_server.h>
+#include <mach/shared_region.h>
+#include <vm/vm_shared_region.h>

 
 

+#include <vm/vm_protos.h>

 
 

-extern zone_t lsf_zone;
+/*
+ * Sysctl's related to data/stack execution.  See osfmk/vm/vm_map.c
+ */
+
+#ifndef SECURE_KERNEL
+extern int allow_stack_exec, allow_data_exec;
+
+SYSCTL_INT(_vm, OID_AUTO, allow_stack_exec, CTLFLAG_RW, &allow_stack_exec, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, allow_data_exec, CTLFLAG_RW, &allow_data_exec, 0, "");
+#endif /* !SECURE_KERNEL */
+
+static const char *prot_values[] = {
+       "none",
+       "read-only",
+       "write-only",
+       "read-write",
+       "execute-only",
+       "read-execute",
+       "write-execute",
+       "read-write-execute"
+};

 
 

-useracc(addr, len, prot)
-       caddr_t addr;
-       u_int   len;
-       int     prot;
+void
+log_stack_execution_failure(addr64_t vaddr, vm_prot_t prot)
+{
+       printf("Data/Stack execution not permitted: %s[pid %d] at virtual address 0x%qx, protections were %s\n", 
+               current_proc()->p_comm, current_proc()->p_pid, vaddr, prot_values[prot & VM_PROT_ALL]);
+}
+
+int shared_region_unnest_logging = 1;
+
+SYSCTL_INT(_vm, OID_AUTO, shared_region_unnest_logging, CTLFLAG_RW,
+          &shared_region_unnest_logging, 0, "");
+
+int vm_shared_region_unnest_log_interval = 10;
+int shared_region_unnest_log_count_threshold = 5;
+
+/* These log rate throttling state variables aren't thread safe, but
+ * are sufficient unto the task.
+ */
+static int64_t last_unnest_log_time = 0; 
+static int shared_region_unnest_log_count = 0;
+
+void log_unnest_badness(vm_map_t m, vm_map_offset_t s, vm_map_offset_t e) {
+       struct timeval tv;
+       const char *pcommstr;
+
+       if (shared_region_unnest_logging == 0)
+               return;
+
+       if (shared_region_unnest_logging == 1) {
+               microtime(&tv);
+               if ((tv.tv_sec - last_unnest_log_time) < vm_shared_region_unnest_log_interval) {
+                       if (shared_region_unnest_log_count++ > shared_region_unnest_log_count_threshold)
+                               return;
+               }
+               else {
+                       last_unnest_log_time = tv.tv_sec;
+                       shared_region_unnest_log_count = 0;
+               }
+       }
+
+       pcommstr = current_proc()->p_comm;
+
+       printf("%s (map: %p) triggered DYLD shared region unnest for map: %p, region 0x%qx->0x%qx. While not abnormal for debuggers, this increases system memory footprint until the target exits.\n", current_proc()->p_comm, get_task_map(current_proc()->task), m, (uint64_t)s, (uint64_t)e);
+}
+
+int
+useracc(
+       user_addr_t     addr,
+       user_size_t     len,
+       int     prot)

 {
        return (vm_map_check_protection(
                        current_map(),
 {
        return (vm_map_check_protection(
                        current_map(),

-                       trunc_page_32((unsigned int)addr), round_page_32((unsigned int)(addr+len)),
+                       vm_map_trunc_page(addr), vm_map_round_page(addr+len),

                        prot == B_READ ? VM_PROT_READ : VM_PROT_WRITE));
 }
 
                        prot == B_READ ? VM_PROT_READ : VM_PROT_WRITE));
 }
 

-vslock(addr, len)
-       caddr_t addr;
-       int     len;
+int
+vslock(
+       user_addr_t     addr,
+       user_size_t     len)

 {
 {

-kern_return_t kret;
-       kret = vm_map_wire(current_map(), trunc_page_32((unsigned int)addr),
-                       round_page_32((unsigned int)(addr+len)), 
+       kern_return_t kret;
+       kret = vm_map_wire(current_map(), vm_map_trunc_page(addr),
+                       vm_map_round_page(addr+len), 

                        VM_PROT_READ | VM_PROT_WRITE ,FALSE);
 
        switch (kret) {
                        VM_PROT_READ | VM_PROT_WRITE ,FALSE);
 
        switch (kret) {


@@ -104,22 +192,25 @@ kern_return_t kret;
        }
 }
 
        }
 }
 

-vsunlock(addr, len, dirtied)
-       caddr_t addr;
-       int     len;
-       int dirtied;
+int
+vsunlock(
+       user_addr_t addr,
+       user_size_t len,
+       __unused int dirtied)

 {
 {

-       pmap_t          pmap;

 #if FIXME  /* [ */
 #if FIXME  /* [ */

+       pmap_t          pmap;

        vm_page_t       pg;
        vm_page_t       pg;

+       vm_map_offset_t vaddr;
+       ppnum_t         paddr;

 #endif  /* FIXME ] */
 #endif  /* FIXME ] */

-       vm_offset_t     vaddr, paddr;

        kern_return_t kret;
 
 #if FIXME  /* [ */
        if (dirtied) {
                pmap = get_task_pmap(current_task());
        kern_return_t kret;
 
 #if FIXME  /* [ */
        if (dirtied) {
                pmap = get_task_pmap(current_task());

-               for (vaddr = trunc_page((unsigned int)(addr)); vaddr < round_page((unsigned int)(addr+len));
+               for (vaddr = vm_map_trunc_page(addr);
+                    vaddr < vm_map_round_page(addr+len);

                                vaddr += PAGE_SIZE) {
                        paddr = pmap_extract(pmap, vaddr);
                        pg = PHYS_TO_VM_PAGE(paddr);
                                vaddr += PAGE_SIZE) {
                        paddr = pmap_extract(pmap, vaddr);
                        pg = PHYS_TO_VM_PAGE(paddr);


@@ -130,8 +221,8 @@ vsunlock(addr, len, dirtied)
 #ifdef lint
        dirtied++;
 #endif /* lint */
 #ifdef lint
        dirtied++;
 #endif /* lint */

-       kret = vm_map_unwire(current_map(), trunc_page_32((unsigned int)(addr)),
-                               round_page_32((unsigned int)(addr+len)), FALSE);
+       kret = vm_map_unwire(current_map(), vm_map_trunc_page(addr),
+                               vm_map_round_page(addr+len), FALSE);

        switch (kret) {
        case KERN_SUCCESS:
                return (0);
        switch (kret) {
        case KERN_SUCCESS:
                return (0);


@@ -145,11 +236,10 @@ vsunlock(addr, len, dirtied)
        }
 }
 
        }
 }
 

-#if    defined(sun) || BALANCE || defined(m88k)
-#else  /*defined(sun) || BALANCE || defined(m88k)*/
-subyte(addr, byte)
-       void * addr;
-       int byte;
+int
+subyte(
+       user_addr_t addr,
+       int byte)

 {
        char character;
        
 {
        char character;
        


@@ -157,18 +247,18 @@ subyte(addr, byte)
        return (copyout((void *)&(character), addr, sizeof(char)) == 0 ? 0 : -1);
 }
 
        return (copyout((void *)&(character), addr, sizeof(char)) == 0 ? 0 : -1);
 }
 

-suibyte(addr, byte)
-       void * addr;
-       int byte;
+int
+suibyte(
+       user_addr_t addr,
+       int byte)

 {
        char character;
        
        character = (char)byte;
 {
        char character;
        
        character = (char)byte;

-       return (copyout((void *) &(character), addr, sizeof(char)) == 0 ? 0 : -1);
+       return (copyout((void *)&(character), addr, sizeof(char)) == 0 ? 0 : -1);

 }
 
 }
 

-int fubyte(addr)
-       void * addr;
+int fubyte(user_addr_t addr)

 {
        unsigned char byte;
 
 {
        unsigned char byte;
 


@@ -177,8 +267,7 @@ int fubyte(addr)
        return(byte);
 }
 
        return(byte);
 }
 

-int fuibyte(addr)
-       void * addr;
+int fuibyte(user_addr_t addr)

 {
        unsigned char byte;
 
 {
        unsigned char byte;
 


@@ -187,17 +276,17 @@ int fuibyte(addr)
        return(byte);
 }
 
        return(byte);
 }
 

-suword(addr, word)
-       void * addr;
-       long word;
+int
+suword(
+       user_addr_t addr,
+       long word)

 {
        return (copyout((void *) &word, addr, sizeof(int)) == 0 ? 0 : -1);
 }
 
 {
        return (copyout((void *) &word, addr, sizeof(int)) == 0 ? 0 : -1);
 }
 

-long fuword(addr)
-       void * addr;
+long fuword(user_addr_t addr)

 {
 {

-       long word;
+       long word = 0;

 
        if (copyin(addr, (void *) &word, sizeof(int)))
                return(-1);
 
        if (copyin(addr, (void *) &word, sizeof(int)))
                return(-1);


@@ -206,44 +295,114 @@ long fuword(addr)
 
 /* suiword and fuiword are the same as suword and fuword, respectively */
 
 
 /* suiword and fuiword are the same as suword and fuword, respectively */
 

-suiword(addr, word)
-       void * addr;
-       long word;
+int
+suiword(
+       user_addr_t addr,
+       long word)

 {
        return (copyout((void *) &word, addr, sizeof(int)) == 0 ? 0 : -1);
 }
 
 {
        return (copyout((void *) &word, addr, sizeof(int)) == 0 ? 0 : -1);
 }
 

-long fuiword(addr)
-       void * addr;
+long fuiword(user_addr_t addr)

 {
 {

-       long word;
+       long word = 0;

 
        if (copyin(addr, (void *) &word, sizeof(int)))
                return(-1);
        return(word);
 }
 
        if (copyin(addr, (void *) &word, sizeof(int)))
                return(-1);
        return(word);
 }

-#endif /* defined(sun) || BALANCE || defined(m88k) || defined(i386) */
+
+/*
+ * With a 32-bit kernel and mixed 32/64-bit user tasks, this interface allows the
+ * fetching and setting of process-sized size_t and pointer values.
+ */
+int
+sulong(user_addr_t addr, int64_t word)
+{
+
+       if (IS_64BIT_PROCESS(current_proc())) {
+               return(copyout((void *)&word, addr, sizeof(word)) == 0 ? 0 : -1);
+       } else {
+               return(suiword(addr, (long)word));
+       }
+}
+
+int64_t
+fulong(user_addr_t addr)
+{
+       int64_t longword;
+
+       if (IS_64BIT_PROCESS(current_proc())) {
+               if (copyin(addr, (void *)&longword, sizeof(longword)) != 0)
+                       return(-1);
+               return(longword);
+       } else {
+               return((int64_t)fuiword(addr));
+       }
+}

 
 int
 
 int

-swapon()
+suulong(user_addr_t addr, uint64_t uword)

 {
 {

-       return(EOPNOTSUPP);
+
+       if (IS_64BIT_PROCESS(current_proc())) {
+               return(copyout((void *)&uword, addr, sizeof(uword)) == 0 ? 0 : -1);
+       } else {
+               return(suiword(addr, (uint32_t)uword));
+       }
+}
+
+uint64_t
+fuulong(user_addr_t addr)
+{
+       uint64_t ulongword;
+
+       if (IS_64BIT_PROCESS(current_proc())) {
+               if (copyin(addr, (void *)&ulongword, sizeof(ulongword)) != 0)
+                       return(-1ULL);
+               return(ulongword);
+       } else {
+               return((uint64_t)fuiword(addr));
+       }

 }
 
 }
 

+int
+swapon(__unused proc_t procp, __unused struct swapon_args *uap, __unused int *retval)
+{
+       return(ENOTSUP);
+}

 
 

+/*
+ * pid_for_task
+ *
+ * Find the BSD process ID for the Mach task associated with the given Mach port 
+ * name
+ *
+ * Parameters: args            User argument descriptor (see below)
+ *
+ * Indirect parameters:        args->t         Mach port name
+ *                     args->pid       Process ID (returned value; see below)
+ *
+ * Returns:    KERL_SUCCESS    Success
+ *             KERN_FAILURE    Not success           
+ *
+ * Implicit returns: args->pid         Process ID
+ *
+ */

 kern_return_t
 kern_return_t

-pid_for_task(t, x)
-       mach_port_t     t;
-       int     *x;
+pid_for_task(
+       struct pid_for_task_args *args)

 {
 {

-       struct proc * p;
+       mach_port_name_t        t = args->t;
+       user_addr_t             pid_addr  = args->pid;  
+       proc_t p;

        task_t          t1;
        task_t          t1;

-       extern task_t port_name_to_task(mach_port_t t);

        int     pid = -1;
        kern_return_t   err = KERN_SUCCESS;
        int     pid = -1;
        kern_return_t   err = KERN_SUCCESS;

-       boolean_t funnel_state;

 
 

-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
+       AUDIT_MACH_SYSCALL_ENTER(AUE_PIDFORTASK);
+       AUDIT_ARG(mach_port1, t);
+

        t1 = port_name_to_task(t);
 
        if (t1 == TASK_NULL) {
        t1 = port_name_to_task(t);
 
        if (t1 == TASK_NULL) {


@@ -252,7 +411,7 @@ pid_for_task(t, x)
        } else {
                p = get_bsdtask_info(t1);
                if (p) {
        } else {
                p = get_bsdtask_info(t1);
                if (p) {

-                       pid  = p->p_pid;
+                       pid  = proc_pid(p);

                        err = KERN_SUCCESS;
                } else {
                        err = KERN_FAILURE;
                        err = KERN_SUCCESS;
                } else {
                        err = KERN_FAILURE;


@@ -260,1554 +419,792 @@ pid_for_task(t, x)
        }
        task_deallocate(t1);
 pftout:
        }
        task_deallocate(t1);
 pftout:

-       (void) copyout((char *) &pid, (char *) x, sizeof(*x));
-       thread_funnel_set(kernel_flock, funnel_state);
+       AUDIT_ARG(pid, pid);
+       (void) copyout((char *) &pid, pid_addr, sizeof(int));
+       AUDIT_MACH_SYSCALL_EXIT(err);

        return(err);
 }
 
        return(err);
 }
 

+/* 
+ *
+ * tfp_policy = KERN_TFP_POLICY_DENY; Deny Mode: None allowed except for self
+ * tfp_policy = KERN_TFP_POLICY_DEFAULT; default mode: all posix checks and upcall via task port for authentication
+ *
+ */
+static  int tfp_policy = KERN_TFP_POLICY_DEFAULT;
+

 /*
 /*

- *     Routine:        task_for_pid
+ *     Routine:        task_for_pid_posix_check

  *     Purpose:
  *     Purpose:

- *             Get the task port for another "process", named by its
- *             process ID on the same host as "target_task".
+ *                     Verify that the current process should be allowed to
+ *                     get the target process's task port. This is only 
+ *                     permitted if:
+ *                     - The current process is root
+ *                     OR all of the following are true:
+ *                     - The target process's real, effective, and saved uids
+ *                       are the same as the current proc's euid,
+ *                     - The target process's group set is a subset of the
+ *                       calling process's group set, and
+ *                     - The target process hasn't switched credentials.

  *
  *

- *             Only permitted to privileged processes, or processes
- *             with the same user ID.
+ *     Returns:        TRUE: permitted
+ *                     FALSE: denied

  */
  */

-kern_return_t
-task_for_pid(target_tport, pid, t)
-       mach_port_t     target_tport;
-       int             pid;
-       mach_port_t     *t;
+static int
+task_for_pid_posix_check(proc_t target)

 {
 {

-       struct proc     *p;
-       struct proc *p1;
-       task_t          t1;
-       mach_port_t     tret;
-       extern task_t port_name_to_task(mach_port_t tp);
-       void * sright;
-       int error = 0;
-       boolean_t funnel_state;
+       kauth_cred_t targetcred, mycred;
+       uid_t myuid;
+       int allowed; 

 
 

-       t1 = port_name_to_task(target_tport);
-       if (t1 == TASK_NULL) {
-               (void ) copyout((char *)&t1, (char *)t, sizeof(mach_port_t));
-               return(KERN_FAILURE);
-       } 
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
- restart:
-       p1 = get_bsdtask_info(t1);
-       if (
-               ((p = pfind(pid)) != (struct proc *) 0)
-               && (p1 != (struct proc *) 0)
-               && (((p->p_ucred->cr_uid == p1->p_ucred->cr_uid) && 
-                       ((p->p_cred->p_ruid == p1->p_cred->p_ruid)))
-               || !(suser(p1->p_ucred, &p1->p_acflag)))
-               && (p->p_stat != SZOMB)
-               ) {
-                       if (p->task != TASK_NULL) {
-                               if (!task_reference_try(p->task)) {
-                                       mutex_pause(); /* temp loss of funnel */
-                                       goto restart;
-                               }
-                               sright = (void *)convert_task_to_port(p->task);
-                               tret = (void *)
-                                       ipc_port_copyout_send(sright, 
-                                          get_task_ipcspace(current_task()));
-                       } else
-                               tret  = MACH_PORT_NULL;
-                       (void ) copyout((char *)&tret, (char *) t, sizeof(mach_port_t));
-               task_deallocate(t1);
-                       error = KERN_SUCCESS;
-                       goto tfpout;
+       /* No task_for_pid on bad targets */
+       if (target == PROC_NULL || target->p_stat == SZOMB) {
+               return FALSE;

        }
        }

-    task_deallocate(t1);
-       tret = MACH_PORT_NULL;
-       (void) copyout((char *) &tret, (char *) t, sizeof(mach_port_t));
-       error = KERN_FAILURE;
-tfpout:
-       thread_funnel_set(kernel_flock, funnel_state);
-       return(error);
-}

 
 

+       mycred = kauth_cred_get();
+       myuid = kauth_cred_getuid(mycred);

 
 

-struct load_shared_file_args {
-               char            *filename;
-               caddr_t         mfa;
-               u_long          mfs;
-               caddr_t         *ba;
-               int             map_cnt;
-               sf_mapping_t    *mappings;
-               int             *flags;
-};
+       /* If we're running as root, the check passes */
+       if (kauth_cred_issuser(mycred))
+               return TRUE;

 
 

-int    ws_disabled = 1;
+       /* We're allowed to get our own task port */
+       if (target == current_proc())
+               return TRUE;

 
 

-int
-load_shared_file(
-       struct proc             *p,
-       struct load_shared_file_args *uap,
-       register                *retval)
-{
-       caddr_t         mapped_file_addr=uap->mfa;
-       u_long          mapped_file_size=uap->mfs;
-       caddr_t         *base_address=uap->ba;
-       int             map_cnt=uap->map_cnt;
-       sf_mapping_t       *mappings=uap->mappings;
-       char            *filename=uap->filename;
-       int             *flags=uap->flags;
-       struct vnode            *vp = 0; 
-       struct nameidata        nd, *ndp;
-       char                    *filename_str;
-       register int            error;
-       kern_return_t           kr;
-
-       struct vattr    vattr;
-       memory_object_control_t file_control;
-        sf_mapping_t    *map_list;
-        caddr_t                local_base;
-       int             local_flags;
-       int             caller_flags;
-       int             i;
-       int             default_regions = 0;
-       vm_size_t       dummy;
-       kern_return_t   kret;
-
-       shared_region_mapping_t shared_region;
-       struct shared_region_task_mappings      task_mapping_info;
-       shared_region_mapping_t next;
-
-       ndp = &nd;
-
-
-       /* Retrieve the base address */
-       if (error = copyin(base_address, &local_base, sizeof (caddr_t))) {
-                       goto lsf_bailout;
-        }
-       if (error = copyin(flags, &local_flags, sizeof (int))) {
-                       goto lsf_bailout;
-        }
-
-       if(local_flags & QUERY_IS_SYSTEM_REGION) {
-                       shared_region_mapping_t default_shared_region;
-                       vm_get_shared_region(current_task(), &shared_region);
-                       task_mapping_info.self = (vm_offset_t)shared_region;
-
-                       shared_region_mapping_info(shared_region, 
-                                       &(task_mapping_info.text_region), 
-                                       &(task_mapping_info.text_size),
-                                       &(task_mapping_info.data_region), 
-                                       &(task_mapping_info.data_size), 
-                                       &(task_mapping_info.region_mappings),
-                                       &(task_mapping_info.client_base), 
-                                       &(task_mapping_info.alternate_base),
-                                       &(task_mapping_info.alternate_next), 
-                                       &(task_mapping_info.fs_base),
-                                       &(task_mapping_info.system),
-                                       &(task_mapping_info.flags), &next);
-
-                       default_shared_region =
-                               lookup_default_shared_region(
-                                       ENV_DEFAULT_ROOT, 
-                                       task_mapping_info.system);
-                       if (shared_region == default_shared_region) {
-                               local_flags = SYSTEM_REGION_BACKED;
-                       } else {
-                               local_flags = 0;
-                       }
-                       shared_region_mapping_dealloc(default_shared_region);
-                       error = 0;
-                       error = copyout(&local_flags, flags, sizeof (int));
-                       goto lsf_bailout;
+       /* 
+        * Under DENY, only root can get another proc's task port,
+        * so no more checks are needed.
+        */
+       if (tfp_policy == KERN_TFP_POLICY_DENY) { 
+               return FALSE;

        }
        }

-       caller_flags = local_flags;
-       kret = kmem_alloc(kernel_map, (vm_offset_t *)&filename_str,
-                       (vm_size_t)(MAXPATHLEN));
-               if (kret != KERN_SUCCESS) {
-                       error = ENOMEM;
-                       goto lsf_bailout;
-               }
-       kret = kmem_alloc(kernel_map, (vm_offset_t *)&map_list,
-                       (vm_size_t)(map_cnt*sizeof(sf_mapping_t)));
-               if (kret != KERN_SUCCESS) {
-                       kmem_free(kernel_map, (vm_offset_t)filename_str, 
-                               (vm_size_t)(MAXPATHLEN));
-                       error = ENOMEM;
-                       goto lsf_bailout;
-               }

 
 

-       if (error = 
-               copyin(mappings, map_list, (map_cnt*sizeof(sf_mapping_t)))) {
-               goto lsf_bailout_free;
-       }
+       targetcred = kauth_cred_proc_ref(target);
+       allowed = TRUE;

 
 

-       if (error = copyinstr(filename, 
-                       filename_str, MAXPATHLEN, (size_t *)&dummy)) {
-               goto lsf_bailout_free;
+       /* Do target's ruid, euid, and saved uid match my euid? */
+       if ((kauth_cred_getuid(targetcred) != myuid) || 
+                       (targetcred->cr_ruid != myuid) ||
+                       (targetcred->cr_svuid != myuid)) {
+               allowed = FALSE;
+               goto out;

        }
 
        }
 

-       /*
-        * Get a vnode for the target file
-        */
-       NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
-           filename_str, p);
-
-       if ((error = namei(ndp))) {
-               goto lsf_bailout_free;
+       /* Are target's groups a subset of my groups? */
+       if (kauth_cred_gid_subset(targetcred, mycred, &allowed) ||
+                       allowed == 0) {
+               allowed = FALSE;
+               goto out;

        }
 
        }
 

-       vp = ndp->ni_vp;
-
-       if (vp->v_type != VREG) {
-               error = EINVAL;
-               goto lsf_bailout_free_vput;
+       /* Has target switched credentials? */
+       if (target->p_flag & P_SUGID) {
+               allowed = FALSE;
+               goto out;

        }
        }

+       
+out:
+       kauth_cred_unref(&targetcred);
+       return allowed;
+}

 
 

-       UBCINFOCHECK("load_shared_file", vp);
+/*
+ *     Routine:        task_for_pid
+ *     Purpose:
+ *             Get the task port for another "process", named by its
+ *             process ID on the same host as "target_task".
+ *
+ *             Only permitted to privileged processes, or processes
+ *             with the same user ID.
+ *
+ *             Note: if pid == 0, an error is return no matter who is calling.
+ *
+ * XXX This should be a BSD system call, not a Mach trap!!!
+ */
+kern_return_t
+task_for_pid(
+       struct task_for_pid_args *args)
+{
+       mach_port_name_t        target_tport = args->target_tport;
+       int                     pid = args->pid;
+       user_addr_t             task_addr = args->t;
+       proc_t                  p = PROC_NULL;
+       task_t                  t1 = TASK_NULL;
+       mach_port_name_t        tret = MACH_PORT_NULL;
+       ipc_port_t              tfpport;
+       void * sright;
+       int error = 0;
+
+       AUDIT_MACH_SYSCALL_ENTER(AUE_TASKFORPID);
+       AUDIT_ARG(pid, pid);
+       AUDIT_ARG(mach_port1, target_tport);

 
 

-       if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) {
-               goto lsf_bailout_free_vput;
+       /* Always check if pid == 0 */
+       if (pid == 0) {
+               (void ) copyout((char *)&t1, task_addr, sizeof(mach_port_name_t));
+               AUDIT_MACH_SYSCALL_EXIT(KERN_FAILURE);
+               return(KERN_FAILURE);

        }
 
        }
 

+       t1 = port_name_to_task(target_tport);
+       if (t1 == TASK_NULL) {
+               (void) copyout((char *)&t1, task_addr, sizeof(mach_port_name_t));
+               AUDIT_MACH_SYSCALL_EXIT(KERN_FAILURE);
+               return(KERN_FAILURE);
+       } 

 
 

-       file_control = ubc_getobject(vp, UBC_HOLDOBJECT);
-       if (file_control == MEMORY_OBJECT_CONTROL_NULL) {
-               error = EINVAL;
-               goto lsf_bailout_free_vput;
-       }

 
 

-#ifdef notdef
-       if(vattr.va_size != mapped_file_size) {
-               error = EINVAL;
-               goto lsf_bailout_free_vput;
-       }
+       p = proc_find(pid);
+#if CONFIG_AUDIT
+       if (p != PROC_NULL)
+               AUDIT_ARG(process, p);

 #endif
 #endif

-       if(p->p_flag & P_NOSHLIB) {
-               p->p_flag = p->p_flag & ~P_NOSHLIB;
-       }

 
 

-       /* load alternate regions if the caller has requested.  */
-       /* Note: the new regions are "clean slates" */
-       if (local_flags & NEW_LOCAL_SHARED_REGIONS) {
-               error = clone_system_shared_regions(FALSE, ENV_DEFAULT_ROOT);
-               if (error) {
-                       goto lsf_bailout_free_vput;
-               }
+       if (!(task_for_pid_posix_check(p))) {
+               error = KERN_FAILURE;
+               goto tfpout;

        }
 
        }
 

-       vm_get_shared_region(current_task(), &shared_region);
-       task_mapping_info.self = (vm_offset_t)shared_region;
-
-       shared_region_mapping_info(shared_region, 
-                       &(task_mapping_info.text_region), 
-                       &(task_mapping_info.text_size),
-                       &(task_mapping_info.data_region), 
-                       &(task_mapping_info.data_size), 
-                       &(task_mapping_info.region_mappings),
-                       &(task_mapping_info.client_base), 
-                       &(task_mapping_info.alternate_base),
-                       &(task_mapping_info.alternate_next), 
-                       &(task_mapping_info.fs_base),
-                       &(task_mapping_info.system),
-                       &(task_mapping_info.flags), &next);
-
-       {
-               shared_region_mapping_t default_shared_region;
-               default_shared_region =
-                       lookup_default_shared_region(
-                               ENV_DEFAULT_ROOT, 
-                               task_mapping_info.system);
-               if(shared_region == default_shared_region) {
-                       default_regions = 1;
-               }
-               shared_region_mapping_dealloc(default_shared_region);
-       }
-       /* If we are running on a removable file system we must not */
-       /* be in a set of shared regions or the file system will not */
-       /* be removable. */
-       if(((vp->v_mount != rootvnode->v_mount) && (default_regions)) 
-               && (lsf_mapping_pool_gauge() < 75)) {
-                               /* We don't want to run out of shared memory */
-                               /* map entries by starting too many private versions */
-                               /* of the shared library structures */
-               int     error;
-                       if(p->p_flag & P_NOSHLIB) {
-                               error = clone_system_shared_regions(FALSE, ENV_DEFAULT_ROOT);
-                       } else {
-                               error = clone_system_shared_regions(TRUE, ENV_DEFAULT_ROOT);
-                       }
-               if (error) {
-                       goto lsf_bailout_free_vput;
-               }
-               local_flags = local_flags & ~NEW_LOCAL_SHARED_REGIONS;
-               vm_get_shared_region(current_task(), &shared_region);
-               shared_region_mapping_info(shared_region, 
-                       &(task_mapping_info.text_region), 
-                       &(task_mapping_info.text_size),
-                       &(task_mapping_info.data_region), 
-                       &(task_mapping_info.data_size), 
-                       &(task_mapping_info.region_mappings),
-                       &(task_mapping_info.client_base), 
-                       &(task_mapping_info.alternate_base),
-                       &(task_mapping_info.alternate_next), 
-                       &(task_mapping_info.fs_base),
-                       &(task_mapping_info.system),
-                       &(task_mapping_info.flags), &next);
-       }
+       if (p->task != TASK_NULL) {
+               /* If we aren't root and target's task access port is set... */
+               if (!kauth_cred_issuser(kauth_cred_get()) &&
+                       p != current_proc() &&
+                       (task_get_task_access_port(p->task, &tfpport) == 0) &&
+                       (tfpport != IPC_PORT_NULL)) {

 
 

-       /*  This is a work-around to allow executables which have been */
-       /*  built without knowledge of the proper shared segment to    */
-       /*  load.  This code has been architected as a shared region   */
-       /*  handler, the knowledge of where the regions are loaded is  */
-       /*  problematic for the extension of shared regions as it will */
-       /*  not be easy to know what region an item should go into.    */
-       /*  The code below however will get around a short term problem */
-       /*  with executables which believe they are loading at zero.   */
-
-       {
-               if (((unsigned int)local_base & 
-                       (~(task_mapping_info.text_size - 1))) != 
-                       task_mapping_info.client_base) {
-                       if(local_flags & ALTERNATE_LOAD_SITE) {
-                               local_base = (caddr_t)(
-                                       (unsigned int)local_base & 
-                                          (task_mapping_info.text_size - 1));
-                               local_base = (caddr_t)((unsigned int)local_base
-                                          | task_mapping_info.client_base);
-                       } else {
-                               error = EINVAL;
-                               goto lsf_bailout_free_vput;
+                       if (tfpport == IPC_PORT_DEAD) {
+                               error = KERN_PROTECTION_FAILURE;
+                               goto tfpout;

                        }
                        }

-               }
-       }

 
 

+                       /* Call up to the task access server */
+                       error = check_task_access(tfpport, proc_selfpid(), kauth_getgid(), pid);

 
 

-       if((kr = copyin_shared_file((vm_offset_t)mapped_file_addr, 
-                       mapped_file_size, 
-                       (vm_offset_t *)&local_base,
-                       map_cnt, map_list, file_control, 
-                       &task_mapping_info, &local_flags))) {
-               switch (kr) {
-                       case KERN_FAILURE:
-                               error = EINVAL;
-                               break;
-                       case KERN_INVALID_ARGUMENT:
-                               error = EINVAL;
-                               break;
-                       case KERN_INVALID_ADDRESS:
-                               error = EACCES;
-                               break;
-                       case KERN_PROTECTION_FAILURE:
-                               /* save EAUTH for authentication in this */
-                               /* routine */
-                               error = EPERM;
-                               break;
-                       case KERN_NO_SPACE:
-                               error = ENOMEM;
-                               break;
-                       default:
-                               error = EINVAL;
-               };
-               if((caller_flags & ALTERNATE_LOAD_SITE) && systemLogDiags) {
-                       printf("load_shared_file:  Failed to load shared file! error: 0x%x, Base_address: 0x%x, number of mappings: %d, file_control 0x%x\n", error, local_base, map_cnt, file_control);
-                       for(i=0; i<map_cnt; i++) {
-                               printf("load_shared_file: Mapping%d, mapping_offset: 0x%x, size: 0x%x, file_offset: 0x%x, protection: 0x%x\n"
-                                       , i, map_list[i].mapping_offset, 
-                                       map_list[i].size, 
-                                       map_list[i].file_offset, 
-                                       map_list[i].protection);
+                       if (error != MACH_MSG_SUCCESS) {
+                               if (error == MACH_RCV_INTERRUPTED)
+                                       error = KERN_ABORTED;
+                               else
+                                       error = KERN_FAILURE;
+                               goto tfpout;

                        }
                }
                        }
                }

-       } else {
-               if(default_regions)
-                       local_flags |= SYSTEM_REGION_BACKED;
-               if(!(error = copyout(&local_flags, flags, sizeof (int)))) {
-                       error = copyout(&local_base, 
-                               base_address, sizeof (caddr_t));
+#if CONFIG_MACF
+               error = mac_proc_check_get_task(kauth_cred_get(), p);
+               if (error) {
+                       error = KERN_FAILURE;
+                       goto tfpout;

                }
                }

-       }
-
-lsf_bailout_free_vput:
-       vput(vp);
+#endif

 
 

-lsf_bailout_free:
-       kmem_free(kernel_map, (vm_offset_t)filename_str, 
-                               (vm_size_t)(MAXPATHLEN));
-       kmem_free(kernel_map, (vm_offset_t)map_list, 
-                               (vm_size_t)(map_cnt*sizeof(sf_mapping_t)));
+               /* Grant task port access */
+               task_reference(p->task);
+               sright = (void *) convert_task_to_port(p->task);
+               tret = ipc_port_copyout_send(
+                               sright, 
+                               get_task_ipcspace(current_task()));
+       } 
+       error = KERN_SUCCESS;

 
 

-lsf_bailout:
-       return error;
+tfpout:
+       task_deallocate(t1);
+       AUDIT_ARG(mach_port2, tret);
+       (void) copyout((char *) &tret, task_addr, sizeof(mach_port_name_t));
+       if (p != PROC_NULL)
+               proc_rele(p);
+       AUDIT_MACH_SYSCALL_EXIT(error);
+       return(error);

 }
 
 }
 

-struct reset_shared_file_args {
-               caddr_t         *ba;
-               int             map_cnt;
-               sf_mapping_t    *mappings;
-};
+/*
+ *     Routine:        task_name_for_pid
+ *     Purpose:
+ *             Get the task name port for another "process", named by its
+ *             process ID on the same host as "target_task".
+ *
+ *             Only permitted to privileged processes, or processes
+ *             with the same user ID.
+ *
+ * XXX This should be a BSD system call, not a Mach trap!!!
+ */

 
 

-int
-reset_shared_file(
-       struct proc             *p,
-       struct reset_shared_file_args *uap,
-       register                *retval)
+kern_return_t
+task_name_for_pid(
+       struct task_name_for_pid_args *args)

 {
 {

-        caddr_t                *base_address=uap->ba;
-        int             map_cnt=uap->map_cnt;
-        sf_mapping_t       *mappings=uap->mappings;
-       register int            error;
-       kern_return_t           kr;
+       mach_port_name_t        target_tport = args->target_tport;
+       int                     pid = args->pid;
+       user_addr_t             task_addr = args->t;
+       proc_t          p = PROC_NULL;
+       task_t          t1;
+       mach_port_name_t        tret;
+       void * sright;
+       int error = 0, refheld = 0;
+       kauth_cred_t target_cred;

 
 

-        sf_mapping_t    *map_list;
-        caddr_t                local_base;
-       vm_offset_t     map_address;
-       int             i;
-       kern_return_t   kret;
+       AUDIT_MACH_SYSCALL_ENTER(AUE_TASKNAMEFORPID);
+       AUDIT_ARG(pid, pid);
+       AUDIT_ARG(mach_port1, target_tport);

 
 

-       /* Retrieve the base address */
-       if (error = copyin(base_address, &local_base, sizeof (caddr_t))) {
-                       goto rsf_bailout;
-        }
+       t1 = port_name_to_task(target_tport);
+       if (t1 == TASK_NULL) {
+               (void) copyout((char *)&t1, task_addr, sizeof(mach_port_name_t));
+               AUDIT_MACH_SYSCALL_EXIT(KERN_FAILURE);
+               return(KERN_FAILURE);
+       } 

 
 

-       if (((unsigned int)local_base & GLOBAL_SHARED_SEGMENT_MASK) 
-                                       != GLOBAL_SHARED_TEXT_SEGMENT) {
-               error = EINVAL;
-               goto rsf_bailout;
-       }
+       p = proc_find(pid);
+       if (p != PROC_NULL) {
+               AUDIT_ARG(process, p);
+               target_cred = kauth_cred_proc_ref(p);
+               refheld = 1;

 
 

-       kret = kmem_alloc(kernel_map, (vm_offset_t *)&map_list,
-                       (vm_size_t)(map_cnt*sizeof(sf_mapping_t)));
-               if (kret != KERN_SUCCESS) {
-                       error = ENOMEM;
-                       goto rsf_bailout;
-               }
+               if ((p->p_stat != SZOMB)
+                   && ((current_proc() == p)
+                       || kauth_cred_issuser(kauth_cred_get()) 
+                       || ((kauth_cred_getuid(target_cred) == kauth_cred_getuid(kauth_cred_get())) && 
+                           ((target_cred->cr_ruid == kauth_cred_get()->cr_ruid))))) {

 
 

-       if (error = 
-               copyin(mappings, map_list, (map_cnt*sizeof(sf_mapping_t)))) {
+                       if (p->task != TASK_NULL) {
+                               task_reference(p->task);
+#if CONFIG_MACF
+                               error = mac_proc_check_get_task_name(kauth_cred_get(),  p);
+                               if (error) {
+                                       task_deallocate(p->task);
+                                       goto noperm;
+                               }
+#endif
+                               sright = (void *)convert_task_name_to_port(p->task);
+                               tret = ipc_port_copyout_send(sright, 
+                                               get_task_ipcspace(current_task()));
+                       } else
+                               tret  = MACH_PORT_NULL;

 
 

-               kmem_free(kernel_map, (vm_offset_t)map_list, 
-                               (vm_size_t)(map_cnt*sizeof(sf_mapping_t)));
-               goto rsf_bailout;
-       }
-       for (i = 0; i<map_cnt; i++) {
-               if((map_list[i].mapping_offset 
-                               & GLOBAL_SHARED_SEGMENT_MASK) == 0x10000000) {
-                       map_address = (vm_offset_t)
-                               (local_base + map_list[i].mapping_offset);
-                       vm_deallocate(current_map(), 
-                               map_address,
-                               map_list[i].size);
-                       vm_map(current_map(), &map_address,
-                               map_list[i].size, 0, SHARED_LIB_ALIAS,
-                               shared_data_region_handle, 
-                               ((unsigned int)local_base 
-                                  & SHARED_DATA_REGION_MASK) +
-                                       (map_list[i].mapping_offset 
-                                       & SHARED_DATA_REGION_MASK),
-                               TRUE, VM_PROT_READ, 
-                               VM_PROT_READ, VM_INHERIT_SHARE);
+                       AUDIT_ARG(mach_port2, tret);
+                       (void) copyout((char *)&tret, task_addr, sizeof(mach_port_name_t));
+                       task_deallocate(t1);
+                       error = KERN_SUCCESS;
+                       goto tnfpout;

                }
        }
 
                }
        }
 

-       kmem_free(kernel_map, (vm_offset_t)map_list, 
-                               (vm_size_t)(map_cnt*sizeof(sf_mapping_t)));
-
-rsf_bailout:
-       return error;
+#if CONFIG_MACF
+noperm:
+#endif
+    task_deallocate(t1);
+       tret = MACH_PORT_NULL;
+       (void) copyout((char *) &tret, task_addr, sizeof(mach_port_name_t));
+       error = KERN_FAILURE;
+tnfpout:
+       if (refheld != 0)
+               kauth_cred_unref(&target_cred);
+       if (p != PROC_NULL)
+               proc_rele(p);
+       AUDIT_MACH_SYSCALL_EXIT(error);
+       return(error);

 }
 
 }
 

-struct new_system_shared_regions_args {
-       int dummy;
-};
-
-int
-new_system_shared_regions(
-       struct proc             *p,
-       struct new_system_shared_regions_args *uap,
-       register                *retval)
+static int
+sysctl_settfp_policy(__unused struct sysctl_oid *oidp, void *arg1,
+    __unused int arg2, struct sysctl_req *req)

 {
 {

-       shared_region_mapping_t regions;
-       shared_region_mapping_t new_regions;
-
-       if(!(is_suser())) {
-               *retval = EINVAL;
-               return EINVAL;
-       }
+    int error = 0;
+       int new_value;

 
 

-       /* clear all of our existing defaults */
-       remove_all_shared_regions();
+    error = SYSCTL_OUT(req, arg1, sizeof(int));
+    if (error || req->newptr == USER_ADDR_NULL)
+        return(error);

 
 

-       *retval = 0;
-       return 0;
-}
+       if (!is_suser())
+               return(EPERM);

 
 

-
-
-int
-clone_system_shared_regions(shared_regions_active, base_vnode)
-{
-       shared_region_mapping_t new_shared_region;
-       shared_region_mapping_t next;
-       shared_region_mapping_t old_shared_region;
-       struct shared_region_task_mappings old_info;
-       struct shared_region_task_mappings new_info;
-
-       struct proc     *p;
-
-       vm_get_shared_region(current_task(), &old_shared_region);
-       old_info.self = (vm_offset_t)old_shared_region;
-       shared_region_mapping_info(old_shared_region,
-               &(old_info.text_region),   
-               &(old_info.text_size),
-               &(old_info.data_region),
-               &(old_info.data_size),
-               &(old_info.region_mappings),
-               &(old_info.client_base),
-               &(old_info.alternate_base),
-               &(old_info.alternate_next), 
-               &(old_info.fs_base),
-               &(old_info.system),
-               &(old_info.flags), &next);
-       if ((shared_regions_active) ||
-               (base_vnode == ENV_DEFAULT_ROOT)) {
-          if (shared_file_create_system_region(&new_shared_region))
-               return (ENOMEM);
-       } else {
-          new_shared_region = 
-               lookup_default_shared_region(
-                       base_vnode, old_info.system);
-          if(new_shared_region == NULL) {
-               shared_file_boot_time_init(
-                       base_vnode, old_info.system);
-               vm_get_shared_region(current_task(), &new_shared_region);
-          } else {
-               vm_set_shared_region(current_task(), new_shared_region);
-          }
-          if(old_shared_region)
-               shared_region_mapping_dealloc(old_shared_region);
-       }
-       new_info.self = (vm_offset_t)new_shared_region;
-       shared_region_mapping_info(new_shared_region,
-               &(new_info.text_region),   
-               &(new_info.text_size),
-               &(new_info.data_region),
-               &(new_info.data_size),
-               &(new_info.region_mappings),
-               &(new_info.client_base),
-               &(new_info.alternate_base),
-               &(new_info.alternate_next), 
-               &(new_info.fs_base),
-               &(new_info.system),
-               &(new_info.flags), &next);
-       if(shared_regions_active) {
-          if(vm_region_clone(old_info.text_region, new_info.text_region)) {
-          panic("clone_system_shared_regions: shared region mis-alignment 1");
-               shared_region_mapping_dealloc(new_shared_region);
-               return(EINVAL);
-          }
-          if (vm_region_clone(old_info.data_region, new_info.data_region)) {
-          panic("clone_system_shared_regions: shared region mis-alignment 2");
-               shared_region_mapping_dealloc(new_shared_region);
-               return(EINVAL);
-          }
-          shared_region_object_chain_attach(
-                               new_shared_region, old_shared_region);
-       }
-       if (vm_map_region_replace(current_map(), old_info.text_region, 
-                       new_info.text_region, old_info.client_base, 
-                       old_info.client_base+old_info.text_size)) {
-       panic("clone_system_shared_regions: shared region mis-alignment 3");
-               shared_region_mapping_dealloc(new_shared_region);
-               return(EINVAL);
-       }
-       if(vm_map_region_replace(current_map(), old_info.data_region, 
-                       new_info.data_region, 
-                       old_info.client_base + old_info.text_size, 
-                       old_info.client_base
-                               + old_info.text_size + old_info.data_size)) {
-       panic("clone_system_shared_regions: shared region mis-alignment 4");
-               shared_region_mapping_dealloc(new_shared_region);
-               return(EINVAL);
+       if ((error = SYSCTL_IN(req, &new_value, sizeof(int)))) {
+               goto out;

        }
        }

-       vm_set_shared_region(current_task(), new_shared_region);
-
-       /* consume the reference which wasn't accounted for in object */
-       /* chain attach */
-       if(!shared_regions_active)
-               shared_region_mapping_dealloc(old_shared_region);
-
-       return(0);
+       if ((new_value == KERN_TFP_POLICY_DENY) 
+               || (new_value == KERN_TFP_POLICY_DEFAULT))
+                       tfp_policy = new_value;
+       else
+                       error = EINVAL;         
+out:
+    return(error);

 
 }
 
 
 }
 

-extern vm_map_t bsd_pageable_map;
-
-/* header for the profile name file.  The profiled app info is held */
-/* in the data file and pointed to by elements in the name file     */
-
-struct profile_names_header {
-       unsigned int    number_of_profiles;
-       unsigned int    user_id;
-       unsigned int    version;
-       off_t           element_array;
-       unsigned int    spare1;
-       unsigned int    spare2;
-       unsigned int    spare3;
-};
-
-struct profile_element {
-       off_t           addr;
-       vm_size_t       size;
-       unsigned int    mod_date;
-       unsigned int    inode;
-       char name[12];
-};
-
-struct global_profile {
-       struct vnode    *names_vp;
-       struct vnode    *data_vp;
-       vm_offset_t     buf_ptr;
-       unsigned int    user;
-       unsigned int    age;
-       unsigned int    busy;
-};
+#if defined(SECURE_KERNEL)
+static int kern_secure_kernel = 1;
+#else
+static int kern_secure_kernel = 0;
+#endif

 
 

-struct global_profile_cache {
-       int                     max_ele;
-       unsigned int            age;
-       struct global_profile   profiles[3];
-};
+SYSCTL_INT(_kern, OID_AUTO, secure_kernel, CTLFLAG_RD, &kern_secure_kernel, 0, "");

 
 

-struct global_profile_cache global_user_profile_cache =
-       {3, 0, NULL, NULL, NULL, 0, 0, 0,
-               NULL, NULL, NULL, 0, 0, 0,
-               NULL, NULL, NULL, 0, 0, 0 };
+SYSCTL_NODE(_kern, KERN_TFP, tfp, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "tfp");
+SYSCTL_PROC(_kern_tfp, KERN_TFP_POLICY, policy, CTLTYPE_INT | CTLFLAG_RW,
+    &tfp_policy, sizeof(uint32_t), &sysctl_settfp_policy ,"I","policy");

 
 

-/* BSD_OPEN_PAGE_CACHE_FILES:                                 */
-/* Caller provides a user id.  This id was used in            */
-/* prepare_profile_database to create two unique absolute     */
-/* file paths to the associated profile files.  These files   */
-/* are either opened or bsd_open_page_cache_files returns an  */
-/* error.  The header of the names file is then consulted.    */
-/* The header and the vnodes for the names and data files are */
-/* returned. */
+SYSCTL_INT(_vm, OID_AUTO, shared_region_trace_level, CTLFLAG_RW,
+          &shared_region_trace_level, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, shared_region_version, CTLFLAG_RD,
+          &shared_region_version, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, shared_region_persistence, CTLFLAG_RW,
+          &shared_region_persistence, 0, "");

 
 

+/*
+ * shared_region_check_np:
+ *
+ * This system call is intended for dyld.
+ *
+ * dyld calls this when any process starts to see if the process's shared
+ * region is already set up and ready to use.
+ * This call returns the base address of the first mapping in the
+ * process's shared region's first mapping.
+ * dyld will then check what's mapped at that address.
+ *
+ * If the shared region is empty, dyld will then attempt to map the shared
+ * cache file in the shared region via the shared_region_map_np() system call.
+ *
+ * If something's already mapped in the shared region, dyld will check if it
+ * matches the shared cache it would like to use for that process.
+ * If it matches, evrything's ready and the process can proceed and use the
+ * shared region.
+ * If it doesn't match, dyld will unmap the shared region and map the shared
+ * cache into the process's address space via mmap().
+ *
+ * ERROR VALUES
+ * EINVAL      no shared region
+ * ENOMEM      shared region is empty
+ * EFAULT      bad address for "start_address"
+ */

 int
 int

-bsd_open_page_cache_files(
-       unsigned int    user,
-       struct global_profile **profile)
+shared_region_check_np(
+       __unused struct proc                    *p,
+       struct shared_region_check_np_args      *uap,
+       __unused int                            *retvalp)

 {
 {

-       char            *cache_path = "/var/vm/app_profile/";
-       struct proc     *p;
-       int             error;
-       int             resid;
-       off_t           resid_off;
-       unsigned int    lru;
-       vm_size_t       size;
-
-       struct  vnode   *names_vp;
-       struct  vnode   *data_vp;
-       vm_offset_t     names_buf;
-       vm_offset_t     buf_ptr;
-
-       int             profile_names_length;
-       int             profile_data_length;
-       char            *profile_data_string;
-       char            *profile_names_string;
-       char            *substring;
-
-       struct vattr    vattr;
-
-       struct  profile_names_header *profile_header;
-       kern_return_t   ret;
-
-       struct nameidata nd_names;
-       struct nameidata nd_data;
-
-       int             i;
-
-
-       p = current_proc();
-
-restart:
-       for(i = 0; i<global_user_profile_cache.max_ele; i++) {
-               if((global_user_profile_cache.profiles[i].user == user) 
-                       &&  (global_user_profile_cache.profiles[i].data_vp 
-                                                               != NULL)) {
-                       *profile = &global_user_profile_cache.profiles[i];
-                       /* already in cache, we're done */
-                       if ((*profile)->busy) {
-                                       /*
-                                       * drop funnel and wait 
-                                       */
-                               (void)tsleep((void *)
-                                       *profile, 
-                                       PRIBIO, "app_profile", 0);
-                               goto restart;
-                       }
-                       (*profile)->busy = 1;
-                       (*profile)->age = global_user_profile_cache.age;
-                       global_user_profile_cache.age+=1;
-                       return 0;
-               }
-       }
-
-       lru = global_user_profile_cache.age;
-       for(i = 0; i<global_user_profile_cache.max_ele; i++) {
-               if(global_user_profile_cache.profiles[i].data_vp == NULL) {
-                       *profile = &global_user_profile_cache.profiles[i];
-                       (*profile)->age = global_user_profile_cache.age;
-                       global_user_profile_cache.age+=1;
-                       break;
-               }
-               if(global_user_profile_cache.profiles[i].age < lru) {
-                       lru = global_user_profile_cache.profiles[i].age;
-                       *profile = &global_user_profile_cache.profiles[i];
-               }
-       }
+       vm_shared_region_t      shared_region;
+       mach_vm_offset_t        start_address;
+       int                     error;
+       kern_return_t           kr;

 
 

-       if ((*profile)->busy) {
-                       /*
-                       * drop funnel and wait 
-                       */
-               (void)tsleep((void *)
-                       &(global_user_profile_cache), 
-                       PRIBIO, "app_profile", 0);
-               goto restart;
-       }
-       (*profile)->busy = 1;
-       (*profile)->user = user;
-
-       if((*profile)->data_vp != NULL) {
-               kmem_free(kernel_map, 
-                               (*profile)->buf_ptr, 4 * PAGE_SIZE);
-               if ((*profile)->names_vp) {
-                       vrele((*profile)->names_vp);
-                       (*profile)->names_vp = NULL;
-               }
-               if ((*profile)->data_vp) {
-                       vrele((*profile)->data_vp);
-                       (*profile)->data_vp = NULL;
+       SHARED_REGION_TRACE_DEBUG(
+               ("shared_region: %p [%d(%s)] -> check_np(0x%llx)\n",
+                current_thread(), p->p_pid, p->p_comm,
+                (uint64_t)uap->start_address));
+
+       /* retrieve the current tasks's shared region */
+       shared_region = vm_shared_region_get(current_task());
+       if (shared_region != NULL) {
+               /* retrieve address of its first mapping... */
+               kr = vm_shared_region_start_address(shared_region,
+                                                   &start_address);
+               if (kr != KERN_SUCCESS) {
+                       error = ENOMEM;
+               } else {
+                       /* ... and give it to the caller */
+                       error = copyout(&start_address,
+                                       (user_addr_t) uap->start_address,
+                                       sizeof (start_address));
+                       if (error) {
+                               SHARED_REGION_TRACE_ERROR(
+                                       ("shared_region: %p [%d(%s)] "
+                                        "check_np(0x%llx) "
+                                        "copyout(0x%llx) error %d\n",
+                                        current_thread(), p->p_pid, p->p_comm,
+                                        (uint64_t)uap->start_address, (uint64_t)start_address,
+                                        error));
+                       }

                }
                }

+               vm_shared_region_deallocate(shared_region);
+       } else {
+               /* no shared region ! */
+               error = EINVAL;

        }
 
        }
 

-       /* put dummy value in for now to get */
-       /* competing request to wait above   */
-       /* until we are finished */
-       (*profile)->data_vp = (struct vnode *)0xFFFFFFFF;
-       
-       /* Try to open the appropriate users profile files */
-       /* If neither file is present, try to create them  */
-       /* If one file is present and the other not, fail. */
-       /* If the files do exist, check them for the app_file */
-       /* requested and read it in if present */
-
+       SHARED_REGION_TRACE_DEBUG(
+               ("shared_region: %p [%d(%s)] check_np(0x%llx) <- 0x%llx %d\n",
+                current_thread(), p->p_pid, p->p_comm,
+                (uint64_t)uap->start_address, (uint64_t)start_address, error));

 
 

-       ret = kmem_alloc(kernel_map,
-               (vm_offset_t *)&profile_data_string, PATH_MAX);
+       return error;
+}

 
 

-       if(ret) {
-               (*profile)->data_vp = NULL;
-               (*profile)->busy = 0;
-               wakeup(*profile);
-               return ENOMEM;
+/*
+ * shared_region_map_np()
+ *
+ * This system call is intended for dyld.
+ *
+ * dyld uses this to map a shared cache file into a shared region.
+ * This is usually done only the first time a shared cache is needed.
+ * Subsequent processes will just use the populated shared region without
+ * requiring any further setup.
+ */
+int
+shared_region_map_np(
+       struct proc                             *p,
+       struct shared_region_map_np_args        *uap,
+       __unused int                            *retvalp)
+{
+       int                             error;
+       kern_return_t                   kr;
+       int                             fd;
+       struct fileproc                 *fp;
+       struct vnode                    *vp, *root_vp;
+       struct vnode_attr               va;
+       off_t                           fs;
+       memory_object_size_t            file_size;
+       user_addr_t                     user_mappings;
+       struct shared_file_mapping_np   *mappings;
+#define SFM_MAX_STACK  8
+       struct shared_file_mapping_np   stack_mappings[SFM_MAX_STACK];
+       unsigned int                    mappings_count;
+       vm_size_t                       mappings_size;
+       memory_object_control_t         file_control;
+       struct vm_shared_region         *shared_region;
+
+       SHARED_REGION_TRACE_DEBUG(
+               ("shared_region: %p [%d(%s)] -> map\n",
+                current_thread(), p->p_pid, p->p_comm));
+
+       shared_region = NULL;
+       mappings_count = 0;
+       mappings_size = 0;
+       mappings = NULL;
+       fp = NULL;
+       vp = NULL;
+
+       /* get file descriptor for shared region cache file */
+       fd = uap->fd;
+
+       /* get file structure from file descriptor */
+       error = fp_lookup(p, fd, &fp, 0);
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map: "
+                        "fd=%d lookup failed (error=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm, fd, error));
+               goto done;

        }
 
        }
 

-       /* Split the buffer in half since we know the size of */
-       /* our file path and our allocation is adequate for   */
-       /* both file path names */
-       profile_names_string = profile_data_string + (PATH_MAX/2);
-
-
-       strcpy(profile_data_string, cache_path);
-       strcpy(profile_names_string, cache_path);
-       profile_names_length = profile_data_length 
-                       = strlen(profile_data_string);
-       substring = profile_data_string + profile_data_length;
-       sprintf(substring, "%x_data", user);
-       substring = profile_names_string + profile_names_length;
-       sprintf(substring, "%x_names", user);
-
-       /* We now have the absolute file names */
-
-       ret = kmem_alloc(kernel_map,
-                               (vm_offset_t *)&names_buf, 4 * PAGE_SIZE);
-       if(ret) {
-               kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, PATH_MAX);
-               (*profile)->data_vp = NULL;
-               (*profile)->busy = 0;
-               wakeup(*profile);
-               return ENOMEM;
+       /* make sure we're attempting to map a vnode */
+       if (fp->f_fglob->fg_type != DTYPE_VNODE) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map: "
+                        "fd=%d not a vnode (type=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        fd, fp->f_fglob->fg_type));
+               error = EINVAL;
+               goto done;

        }
 
        }
 

-       NDINIT(&nd_names, LOOKUP, FOLLOW | LOCKLEAF, 
-                       UIO_SYSSPACE, profile_names_string, p);
-       NDINIT(&nd_data, LOOKUP, FOLLOW | LOCKLEAF, 
-                       UIO_SYSSPACE, profile_data_string, p);
-       if (error = vn_open(&nd_data, FREAD | FWRITE, 0)) {
-#ifdef notdef
-               printf("bsd_open_page_cache_files: CacheData file not found %s\n",
-                       profile_data_string);
-#endif
-               kmem_free(kernel_map, 
-                               (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)profile_data_string, PATH_MAX);
-               (*profile)->data_vp = NULL;
-               (*profile)->busy = 0;
-               wakeup(*profile);
-               return error;
+       /* we need at least read permission on the file */
+       if (! (fp->f_fglob->fg_flag & FREAD)) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map: "
+                        "fd=%d not readable\n",
+                        current_thread(), p->p_pid, p->p_comm, fd));
+               error = EPERM;
+               goto done;

        }
 
        }
 

-       data_vp = nd_data.ni_vp;
-       VOP_UNLOCK(data_vp, 0, p);
-
-       if (error = vn_open(&nd_names, FREAD | FWRITE, 0)) {
-               printf("bsd_open_page_cache_files: NamesData file not found %s\n",
-                       profile_data_string);
-               kmem_free(kernel_map, 
-                               (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)profile_data_string, PATH_MAX);
-               vrele(data_vp);
-               (*profile)->data_vp = NULL;
-               (*profile)->busy = 0;
-               wakeup(*profile);
-               return error;
-       }
-       names_vp = nd_names.ni_vp;
-
-       if(error = VOP_GETATTR(names_vp, &vattr, p->p_ucred, p)) {
-               printf("bsd_open_page_cache_files: Can't stat name file %s\n", profile_names_string);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)profile_data_string, PATH_MAX);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-               vput(names_vp);
-               vrele(data_vp);
-               (*profile)->data_vp = NULL;
-               (*profile)->busy = 0;
-               wakeup(*profile);
-               return error;
+       /* get vnode from file structure */
+       error = vnode_getwithref((vnode_t) fp->f_fglob->fg_data);
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map: "
+                        "fd=%d getwithref failed (error=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm, fd, error));
+               goto done;

        }
        }

+       vp = (struct vnode *) fp->f_fglob->fg_data;

 
 

-       size = vattr.va_size;
-       if(size > 4 * PAGE_SIZE) 
-               size = 4 * PAGE_SIZE;
-       buf_ptr = names_buf;
-       resid_off = 0;
-
-       while(size) {
-               error = vn_rdwr(UIO_READ, names_vp, (caddr_t)buf_ptr, 
-                       size, resid_off,
-                       UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p);
-               if((error) || (size == resid)) {
-                       if(!error) {
-                               error = EINVAL;
-                       }
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, PATH_MAX);
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-                       vput(names_vp);
-                       vrele(data_vp);
-                       (*profile)->data_vp = NULL;
-                       (*profile)->busy = 0;
-                       wakeup(*profile);
-                       return error;
-               }
-               buf_ptr += size-resid;
-               resid_off += size-resid;
-               size = resid;
+       /* make sure the vnode is a regular file */
+       if (vp->v_type != VREG) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "not a file (type=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, vp->v_type));
+               error = EINVAL;
+               goto done;

        }
        }

-       
-       VOP_UNLOCK(names_vp, 0, p);
-       kmem_free(kernel_map, (vm_offset_t)profile_data_string, PATH_MAX);
-       (*profile)->names_vp = names_vp;
-       (*profile)->data_vp = data_vp;
-       (*profile)->buf_ptr = names_buf;
-       return 0;
-
-}
-
-void
-bsd_close_page_cache_files(
-       struct global_profile *profile)
-{
-       profile->busy = 0;
-       wakeup(profile);
-}
-
-int
-bsd_read_page_cache_file(
-       unsigned int    user,
-       int             *fid,
-       int             *mod,
-       char            *app_name,
-       struct vnode    *app_vp,
-       vm_offset_t     *buffer,
-       vm_offset_t     *buf_size)
-{
-
-       boolean_t               funnel_state;

 
 

-       struct proc     *p;
-       int             error;
-       int             resid;
-       vm_size_t       size;
-
-       off_t           profile;
-       unsigned int    profile_size;
-
-       vm_offset_t     names_buf;
-       struct vattr    vattr;
-
-       kern_return_t   ret;
-
-       struct  vnode   *names_vp;
-       struct  vnode   *data_vp;
-       struct  vnode   *vp1;
-       struct  vnode   *vp2;
-
-       struct global_profile *uid_files;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       /* Try to open the appropriate users profile files */
-       /* If neither file is present, try to create them  */
-       /* If one file is present and the other not, fail. */
-       /* If the files do exist, check them for the app_file */
-       /* requested and read it in if present */
-
-
-       error = bsd_open_page_cache_files(user, &uid_files);
-       if(error) {
-               thread_funnel_set(kernel_flock, funnel_state);
-               return EINVAL;
+       /* make sure vnode is on the process's root volume */
+       root_vp = p->p_fd->fd_rdir;
+       if (root_vp == NULL) {
+               root_vp = rootvnode;

        }
        }

-
-       p = current_proc();
-
-       names_vp = uid_files->names_vp;
-       data_vp = uid_files->data_vp;
-       names_buf = uid_files->buf_ptr;
-
-
-       /* 
-        * Get locks on both files, get the vnode with the lowest address first
-        */
-
-       if((unsigned int)names_vp < (unsigned int)data_vp) {
-               vp1 = names_vp;
-               vp2 = data_vp;
-       } else {
-               vp1 = data_vp;
-               vp2 = names_vp;
+       if (vp->v_mount != root_vp->v_mount) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "not on process's root volume\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name));
+               error = EPERM;
+               goto done;

        }
        }

-       error = vn_lock(vp1, LK_EXCLUSIVE | LK_RETRY, p);
-       if(error) {
-               printf("bsd_read_page_cache_file: Can't lock profile names %x\n", user);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
+
+       /* make sure vnode is owned by "root" */
+       VATTR_INIT(&va);
+       VATTR_WANTED(&va, va_uid);
+       error = vnode_getattr(vp, &va, vfs_context_current());
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "vnode_getattr(%p) failed (error=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, vp, error));
+               goto done;

        }
        }

-       error = vn_lock(vp2, LK_EXCLUSIVE | LK_RETRY, p);
-       if(error) {
-               printf("bsd_read_page_cache_file: Can't lock profile data %x\n", user);
-               VOP_UNLOCK(vp1, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
+       if (va.va_uid != 0) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "owned by uid=%d instead of 0\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, va.va_uid));
+               error = EPERM;
+               goto done;

        }
 
        }
 

-       if(error = VOP_GETATTR(app_vp, &vattr, p->p_ucred, p)) {
-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               printf("bsd_read_cache_file: Can't stat app file %s\n", app_name);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
+       /* get vnode size */
+       error = vnode_size(vp, &fs, vfs_context_current());
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "vnode_size(%p) failed (error=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, vp, error));
+               goto done;

        }
        }

+       file_size = fs;

 
 

-       *fid = vattr.va_fileid;
-       *mod = vattr.va_mtime.tv_sec;
-               
-
-       if (bsd_search_page_cache_data_base(names_vp, names_buf, app_name, 
-                       (unsigned int) vattr.va_mtime.tv_sec,  
-                       vattr.va_fileid, &profile, &profile_size) == 0) {
-               /* profile is an offset in the profile data base */
-               /* It is zero if no profile data was found */
-               
-               if(profile_size == 0) {
-                       *buffer = NULL;
-                       *buf_size = 0;
-                       VOP_UNLOCK(names_vp, 0, p);
-                       VOP_UNLOCK(data_vp, 0, p);
-                       bsd_close_page_cache_files(uid_files);
-                       thread_funnel_set(kernel_flock, funnel_state);
-                       return 0;
-               }
-               ret = (vm_offset_t)(kmem_alloc(kernel_map, buffer, profile_size));
-               if(ret) {
-                       VOP_UNLOCK(names_vp, 0, p);
-                       VOP_UNLOCK(data_vp, 0, p);
-                       bsd_close_page_cache_files(uid_files);
-                       thread_funnel_set(kernel_flock, funnel_state);
-                       return ENOMEM;
-               }
-               *buf_size = profile_size;
-               while(profile_size) {
-                       error = vn_rdwr(UIO_READ, data_vp, 
-                               (caddr_t) *buffer, profile_size, 
-                               profile, UIO_SYSSPACE, IO_NODELOCKED, 
-                               p->p_ucred, &resid, p);
-                       if((error) || (profile_size == resid)) {
-                               VOP_UNLOCK(names_vp, 0, p);
-                               VOP_UNLOCK(data_vp, 0, p);
-                               bsd_close_page_cache_files(uid_files);
-                               kmem_free(kernel_map, (vm_offset_t)*buffer, profile_size);
-                               thread_funnel_set(kernel_flock, funnel_state);
-                               return EINVAL;
-                       }
-                       profile += profile_size - resid;
-                       profile_size = resid;
-               }
-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return 0;
+       /* get the file's memory object handle */
+       file_control = ubc_getobject(vp, UBC_HOLDOBJECT);
+       if (file_control == MEMORY_OBJECT_CONTROL_NULL) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "no memory object\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name));
+               error = EINVAL;
+               goto done;
+       }
+                        
+       /* get the list of mappings the caller wants us to establish */
+       mappings_count = uap->count;    /* number of mappings */
+       mappings_size = (vm_size_t) (mappings_count * sizeof (mappings[0]));
+       if (mappings_count == 0) {
+               SHARED_REGION_TRACE_INFO(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "no mappings\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name));
+               error = 0;      /* no mappings: we're done ! */
+               goto done;
+       } else if (mappings_count <= SFM_MAX_STACK) {
+               mappings = &stack_mappings[0];

        } else {
        } else {

-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return EINVAL;
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "too many mappings (%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, mappings_count));
+               error = EINVAL;
+               goto done;

        }
        }

-       
-}
-
-int
-bsd_search_page_cache_data_base(
-       struct  vnode                   *vp,
-       struct profile_names_header     *database,
-       char                            *app_name,
-       unsigned int                    mod_date,
-       unsigned int                    inode,
-       off_t                           *profile,
-       unsigned int                    *profile_size)
-{
-
-       struct proc             *p;
-
-       unsigned int            i;
-       struct profile_element  *element;
-       unsigned int            ele_total;
-       unsigned int            extended_list = 0;
-       off_t                   file_off = 0;
-       unsigned int            size;
-       off_t                   resid_off;
-       int                     resid;
-       vm_offset_t             local_buf = NULL;
-
-       int                     error;
-       kern_return_t           ret;

 
 

-       p = current_proc();
+       user_mappings = uap->mappings;  /* the mappings, in user space */
+       error = copyin(user_mappings,
+                      mappings,
+                      mappings_size);
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "copyin(0x%llx, %d) failed (error=%d)\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, (uint64_t)user_mappings, mappings_count, error));
+               goto done;
+       }

 
 

-       if(((vm_offset_t)database->element_array) !=
-                               sizeof(struct profile_names_header)) {
-               return EINVAL;
+       /* get the process's shared region (setup in vm_map_exec()) */
+       shared_region = vm_shared_region_get(current_task());
+       if (shared_region == NULL) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "no shared region\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name));
+               goto done;

        }
        }

-       element = (struct profile_element *)(
-                       (vm_offset_t)database->element_array + 
-                                               (vm_offset_t)database);

 
 

-       ele_total = database->number_of_profiles;
-       
-       *profile = 0;
-       *profile_size = 0;
-       while(ele_total) {
-               /* note: code assumes header + n*ele comes out on a page boundary */
-               if(((local_buf == 0) && (sizeof(struct profile_names_header) + 
-                       (ele_total * sizeof(struct profile_element))) 
-                                       > (PAGE_SIZE * 4)) ||
-                       ((local_buf != 0) && 
-                               (ele_total * sizeof(struct profile_element))
-                                        > (PAGE_SIZE * 4))) {
-                       extended_list = ele_total;
-                       if(element == (struct profile_element *)
-                               ((vm_offset_t)database->element_array + 
-                                               (vm_offset_t)database)) {
-                               ele_total = ((PAGE_SIZE * 4)/sizeof(struct profile_element)) - 1;
-                       } else {
-                               ele_total = (PAGE_SIZE * 4)/sizeof(struct profile_element);
-                       }
-                       extended_list -= ele_total;
-               }
-               for (i=0; i<ele_total; i++) {
-                       if((mod_date == element[i].mod_date) 
-                                       && (inode == element[i].inode)) {
-                               if(strncmp(element[i].name, app_name, 12) == 0) {
-                                       *profile = element[i].addr;
-                                       *profile_size = element[i].size;
-                                       if(local_buf != NULL) {
-                                               kmem_free(kernel_map, 
-                                                       (vm_offset_t)local_buf, 4 * PAGE_SIZE);
-                                       }
-                                       return 0;
-                               }
-                       }
-               }
-               if(extended_list == 0)
+       /* map the file into that shared region's submap */
+       kr = vm_shared_region_map_file(shared_region,
+                                      mappings_count,
+                                      mappings,
+                                      file_control,
+                                      file_size,
+                                      (void *) p->p_fd->fd_rdir);
+       if (kr != KERN_SUCCESS) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                        "vm_shared_region_map_file() failed kr=0x%x\n",
+                        current_thread(), p->p_pid, p->p_comm,
+                        vp, vp->v_name, kr));
+               switch (kr) {
+               case KERN_INVALID_ADDRESS:
+                       error = EFAULT;
+                       break;
+               case KERN_PROTECTION_FAILURE:
+                       error = EPERM;
+                       break;
+               case KERN_NO_SPACE:
+                       error = ENOMEM;
+                       break;
+               case KERN_FAILURE:
+               case KERN_INVALID_ARGUMENT:
+               default:
+                       error = EINVAL;

                        break;
                        break;

-               if(local_buf == NULL) {
-                       ret = kmem_alloc(kernel_map,
-                                       (vm_offset_t *)&local_buf, 4 * PAGE_SIZE);
-                       if(ret != KERN_SUCCESS) {
-                               return ENOMEM;
-                       }
-               }
-               element = (struct profile_element *)local_buf;
-               ele_total = extended_list;
-               extended_list = 0;
-               file_off +=  4 * PAGE_SIZE;
-               if((ele_total * sizeof(struct profile_element)) > 
-                                                       (PAGE_SIZE * 4)) {
-                       size = PAGE_SIZE * 4;
-               } else {
-                       size = ele_total * sizeof(struct profile_element);
-               }
-               resid_off = 0;
-               while(size) {
-                       error = vn_rdwr(UIO_READ, vp, 
-                               (caddr_t)(local_buf + resid_off),
-                               size, file_off + resid_off, UIO_SYSSPACE, 
-                               IO_NODELOCKED, p->p_ucred, &resid, p);
-                       if((error) || (size == resid)) {
-                               if(local_buf != NULL) {
-                                       kmem_free(kernel_map, 
-                                               (vm_offset_t)local_buf, 
-                                               4 * PAGE_SIZE);
-                               }
-                               return EINVAL;
-                       }
-                       resid_off += size-resid;
-                       size = resid;

                }
                }

+               goto done;

        }
        }

-       if(local_buf != NULL) {
-               kmem_free(kernel_map, 
-                       (vm_offset_t)local_buf, 4 * PAGE_SIZE);
-       }
-       return 0;
-}

 
 

-int
-bsd_write_page_cache_file(
-       unsigned int    user,
-       char            *file_name,
-       caddr_t         buffer,
-       vm_size_t       size,
-       int             mod,
-       int             fid)
-{
-       struct proc             *p;
-       struct nameidata        nd;
-       struct vnode            *vp = 0; 
-       int                     resid;
-       off_t                   resid_off;
-       int                     error;
-       boolean_t               funnel_state;
-       struct vattr            vattr;
-       struct vattr            data_vattr;
+       error = 0;

 
 

-       off_t                           profile;
-       unsigned int                    profile_size;
-
-       vm_offset_t     names_buf;
-       struct  vnode   *names_vp;
-       struct  vnode   *data_vp;
-       struct  vnode   *vp1;
-       struct  vnode   *vp2;
-
-       struct  profile_names_header *profile_header;
-       off_t                   name_offset;
-
-       struct global_profile *uid_files;
-
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-
-
-       error = bsd_open_page_cache_files(user, &uid_files);
-       if(error) {
-               thread_funnel_set(kernel_flock, funnel_state);
-               return EINVAL;
+       /* update the vnode's access time */
+       if (! (vnode_vfsvisflags(vp) & MNT_NOATIME)) {
+               VATTR_INIT(&va);
+               nanotime(&va.va_access_time);
+               VATTR_SET_ACTIVE(&va, va_access_time);
+               vnode_setattr(vp, &va, vfs_context_current());

        }
 
        }
 

-       p = current_proc();
-
-       names_vp = uid_files->names_vp;
-       data_vp = uid_files->data_vp;
-       names_buf = uid_files->buf_ptr;
-
-       /* 
-        * Get locks on both files, get the vnode with the lowest address first
-        */
-
-       if((unsigned int)names_vp < (unsigned int)data_vp) {
-               vp1 = names_vp;
-               vp2 = data_vp;
-       } else {
-               vp1 = data_vp;
-               vp2 = names_vp;
+       if (p->p_flag & P_NOSHLIB) {
+               /* signal that this process is now using split libraries */
+               OSBitAndAtomic(~((uint32_t)P_NOSHLIB), &p->p_flag);

        }
 
        }
 

-       error = vn_lock(vp1, LK_EXCLUSIVE | LK_RETRY, p);
-       if(error) {
-               printf("bsd_write_page_cache_file: Can't lock profile names %x\n", user);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
-       }
-       error = vn_lock(vp2, LK_EXCLUSIVE | LK_RETRY, p);
-       if(error) {
-               printf("bsd_write_page_cache_file: Can't lock profile data %x\n", user);
-               VOP_UNLOCK(vp1, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
+done:
+       if (vp != NULL) {
+               /*
+                * release the vnode...
+                * ubc_map() still holds it for us in the non-error case
+                */
+               (void) vnode_put(vp);
+               vp = NULL;

        }
        }

-
-       /* Stat data file for size */
-
-       if(error = VOP_GETATTR(data_vp, &data_vattr, p->p_ucred, p)) {
-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               printf("bsd_write_page_cache_file: Can't stat profile data %s\n", file_name);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return error;
+       if (fp != NULL) {
+               /* release the file descriptor */
+               fp_drop(p, fd, fp, 0);
+               fp = NULL;

        }
        }

-               
-       if (bsd_search_page_cache_data_base(names_vp, 
-                       (struct profile_names_header *)names_buf, 
-                       file_name, (unsigned int) mod,  
-                       fid, &profile, &profile_size) == 0) {
-               /* profile is an offset in the profile data base */
-               /* It is zero if no profile data was found */
-               
-               if(profile_size == 0) {
-                       unsigned int    header_size;
-                       vm_offset_t     buf_ptr;
-
-                       /* Our Write case */
-
-                       /* read header for last entry */
-                       profile_header = 
-                               (struct profile_names_header *)names_buf;
-                       name_offset = sizeof(struct profile_names_header) + 
-                               (sizeof(struct profile_element) 
-                                       * profile_header->number_of_profiles);
-                       profile_header->number_of_profiles += 1;
-
-                       if(name_offset < PAGE_SIZE * 4) {
-                               struct profile_element  *name;
-                               /* write new entry */
-                               name = (struct profile_element *)
-                                       (names_buf + (vm_offset_t)name_offset);
-                               name->addr =  data_vattr.va_size;
-                               name->size = size;
-                               name->mod_date = mod;
-                               name->inode = fid;
-                               strncpy (name->name, file_name, 12);
-                       } else {
-                               unsigned int    ele_size;
-                               struct profile_element  name;
-                               /* write new entry */
-                               name.addr = data_vattr.va_size;
-                               name.size = size;
-                               name.mod_date = mod;
-                               name.inode = fid;
-                               strncpy (name.name, file_name, 12);
-                               /* write element out separately */
-                               ele_size = sizeof(struct profile_element);
-                               buf_ptr = (vm_offset_t)&name;
-                               resid_off = name_offset;
-
-                               while(ele_size) {
-                                       error = vn_rdwr(UIO_WRITE, names_vp, 
-                                               (caddr_t)buf_ptr, 
-                                               ele_size, resid_off, 
-                                               UIO_SYSSPACE, IO_NODELOCKED, 
-                                               p->p_ucred, &resid, p);
-                                       if(error) {
-                                               printf("bsd_write_page_cache_file: Can't write name_element %x\n", user);
-                                               VOP_UNLOCK(names_vp, 0, p);
-                                               VOP_UNLOCK(data_vp, 0, p);
-                                               bsd_close_page_cache_files(
-                                                       uid_files);
-                                               thread_funnel_set(
-                                                       kernel_flock, 
-                                                       funnel_state);
-                                               return error;
-                                       }
-                                       buf_ptr += (vm_offset_t)
-                                                       ele_size-resid;
-                                       resid_off += ele_size-resid;
-                                       ele_size = resid;
-                               }
-                       }

 
 

-                       if(name_offset < PAGE_SIZE * 4) {
-                               header_size = name_offset + 
-                                       sizeof(struct profile_element);
-                               
-                       } else {
-                               header_size = 
-                                       sizeof(struct profile_names_header);
-                       }
-                       buf_ptr = (vm_offset_t)profile_header;
-                       resid_off = 0;
-
-                       /* write names file header */
-                       while(header_size) {
-                               error = vn_rdwr(UIO_WRITE, names_vp, 
-                                       (caddr_t)buf_ptr, 
-                                       header_size, resid_off, 
-                                       UIO_SYSSPACE, IO_NODELOCKED, 
-                                       p->p_ucred, &resid, p);
-                               if(error) {
-                                       VOP_UNLOCK(names_vp, 0, p);
-                                       VOP_UNLOCK(data_vp, 0, p);
-                                       printf("bsd_write_page_cache_file: Can't write header %x\n", user);
-                                       bsd_close_page_cache_files(
-                                               uid_files);
-                                       thread_funnel_set(
-                                               kernel_flock, funnel_state);
-                                       return error;
-                               }
-                               buf_ptr += (vm_offset_t)header_size-resid;
-                               resid_off += header_size-resid;
-                               header_size = resid;
-                       }
-                       /* write profile to data file */
-                       resid_off = data_vattr.va_size;
-                       while(size) {
-                               error = vn_rdwr(UIO_WRITE, data_vp, 
-                                       (caddr_t)buffer, size, resid_off, 
-                                       UIO_SYSSPACE, IO_NODELOCKED, 
-                                       p->p_ucred, &resid, p);
-                               if(error) {
-                                       VOP_UNLOCK(names_vp, 0, p);
-                                       VOP_UNLOCK(data_vp, 0, p);
-                                       printf("bsd_write_page_cache_file: Can't write header %x\n", user);
-                                       bsd_close_page_cache_files(
-                                               uid_files);
-                                       thread_funnel_set(
-                                               kernel_flock, funnel_state);
-                                       return error;
-                               }
-                               buffer += size-resid;
-                               resid_off += size-resid;
-                               size = resid;
-                       }
-                       VOP_UNLOCK(names_vp, 0, p);
-                       VOP_UNLOCK(data_vp, 0, p);
-                       bsd_close_page_cache_files(uid_files);
-                       thread_funnel_set(kernel_flock, funnel_state);
-                       return 0;
-               }
-               /* Someone else wrote a twin profile before us */
-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return 0;
-       } else {                
-               VOP_UNLOCK(names_vp, 0, p);
-               VOP_UNLOCK(data_vp, 0, p);
-               bsd_close_page_cache_files(uid_files);
-               thread_funnel_set(kernel_flock, funnel_state);
-               return EINVAL;
+       if (shared_region != NULL) {
+               vm_shared_region_deallocate(shared_region);

        }
        }

-       
-}
-
-int
-prepare_profile_database(int   user)
-{
-       char            *cache_path = "/var/vm/app_profile/";
-       struct proc     *p;
-       int             error;
-       int             resid;
-       off_t           resid_off;
-       unsigned int    lru;
-       vm_size_t       size;

 
 

-       struct  vnode   *names_vp;
-       struct  vnode   *data_vp;
-       vm_offset_t     names_buf;
-       vm_offset_t     buf_ptr;
+       SHARED_REGION_TRACE_DEBUG(
+               ("shared_region: %p [%d(%s)] <- map\n",
+                current_thread(), p->p_pid, p->p_comm));

 
 

-       int             profile_names_length;
-       int             profile_data_length;
-       char            *profile_data_string;
-       char            *profile_names_string;
-       char            *substring;
+       return error;
+}

 
 

-       struct vattr    vattr;

 
 

-       struct  profile_names_header *profile_header;
-       kern_return_t   ret;
+/* sysctl overflow room */

 
 

-       struct nameidata nd_names;
-       struct nameidata nd_data;
+/* vm_page_free_target is provided as a makeshift solution for applications that want to
+       allocate buffer space, possibly purgeable memory, but not cause inactive pages to be
+       reclaimed. It allows the app to calculate how much memory is free outside the free target. */
+extern unsigned int    vm_page_free_target;
+SYSCTL_INT(_vm, OID_AUTO, vm_page_free_target, CTLFLAG_RD, 
+                  &vm_page_free_target, 0, "Pageout daemon free target");

 
 

-       int             i;
+extern unsigned int    vm_memory_pressure;
+SYSCTL_INT(_vm, OID_AUTO, memory_pressure, CTLFLAG_RD,
+          &vm_memory_pressure, 0, "Memory pressure indicator");

 
 

-       p = current_proc();
+static int
+vm_ctl_page_free_wanted SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+       unsigned int page_free_wanted;

 
 

-       ret = kmem_alloc(kernel_map,
-               (vm_offset_t *)&profile_data_string, PATH_MAX);
+       page_free_wanted = mach_vm_ctl_page_free_wanted();
+       return SYSCTL_OUT(req, &page_free_wanted, sizeof (page_free_wanted));
+}
+SYSCTL_PROC(_vm, OID_AUTO, page_free_wanted,
+           CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED,
+           0, 0, vm_ctl_page_free_wanted, "I", "");
+
+extern unsigned int    vm_page_purgeable_count;
+SYSCTL_INT(_vm, OID_AUTO, page_purgeable_count, CTLFLAG_RD,
+          &vm_page_purgeable_count, 0, "Purgeable page count");
+
+extern unsigned int    vm_page_purgeable_wired_count;
+SYSCTL_INT(_vm, OID_AUTO, page_purgeable_wired_count, CTLFLAG_RD,
+          &vm_page_purgeable_wired_count, 0, "Wired purgeable page count");
+
+SYSCTL_INT(_vm, OID_AUTO, page_reusable_count, CTLFLAG_RD,
+          &vm_page_stats_reusable.reusable_count, 0, "Reusable page count");
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_success, CTLFLAG_RD,
+          &vm_page_stats_reusable.reusable_pages_success, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_failure, CTLFLAG_RD,
+          &vm_page_stats_reusable.reusable_pages_failure, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_shared, CTLFLAG_RD,
+          &vm_page_stats_reusable.reusable_pages_shared, "");
+SYSCTL_QUAD(_vm, OID_AUTO, all_reusable_calls, CTLFLAG_RD,
+          &vm_page_stats_reusable.all_reusable_calls, "");
+SYSCTL_QUAD(_vm, OID_AUTO, partial_reusable_calls, CTLFLAG_RD,
+          &vm_page_stats_reusable.partial_reusable_calls, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reuse_success, CTLFLAG_RD,
+          &vm_page_stats_reusable.reuse_pages_success, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reuse_failure, CTLFLAG_RD,
+          &vm_page_stats_reusable.reuse_pages_failure, "");
+SYSCTL_QUAD(_vm, OID_AUTO, all_reuse_calls, CTLFLAG_RD,
+          &vm_page_stats_reusable.all_reuse_calls, "");
+SYSCTL_QUAD(_vm, OID_AUTO, partial_reuse_calls, CTLFLAG_RD,
+          &vm_page_stats_reusable.partial_reuse_calls, "");
+SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_success, CTLFLAG_RD,
+          &vm_page_stats_reusable.can_reuse_success, "");
+SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_failure, CTLFLAG_RD,
+          &vm_page_stats_reusable.can_reuse_failure, "");

 
 

-       if(ret) {
-               return ENOMEM;
-       }

 
 

-       /* Split the buffer in half since we know the size of */
-       /* our file path and our allocation is adequate for   */
-       /* both file path names */
-       profile_names_string = profile_data_string + (PATH_MAX/2);
-
-
-       strcpy(profile_data_string, cache_path);
-       strcpy(profile_names_string, cache_path);
-       profile_names_length = profile_data_length 
-                       = strlen(profile_data_string);
-       substring = profile_data_string + profile_data_length;
-       sprintf(substring, "%x_data", user);
-       substring = profile_names_string + profile_names_length;
-       sprintf(substring, "%x_names", user);
-
-       /* We now have the absolute file names */
-
-       ret = kmem_alloc(kernel_map,
-                               (vm_offset_t *)&names_buf, 4 * PAGE_SIZE);
-       if(ret) {
-               kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, PATH_MAX);
-               return ENOMEM;
-       }
+int
+vm_pressure_monitor(
+       __unused struct proc *p,
+       struct vm_pressure_monitor_args *uap,
+       int *retval)
+{
+       kern_return_t   kr;
+       uint32_t        pages_reclaimed;
+       uint32_t        pages_wanted;

 
 

-       NDINIT(&nd_names, LOOKUP, FOLLOW, 
-                       UIO_SYSSPACE, profile_names_string, p);
-       NDINIT(&nd_data, LOOKUP, FOLLOW,
-                       UIO_SYSSPACE, profile_data_string, p);
-
-       if (error = vn_open(&nd_data, 
-                       O_CREAT | O_EXCL | FWRITE, S_IRUSR|S_IWUSR)) {
-                       kmem_free(kernel_map, 
-                                       (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, PATH_MAX);
-                       return 0;
-       }
+       kr = mach_vm_pressure_monitor(
+               (boolean_t) uap->wait_for_pressure,
+               uap->nsecs_monitored,
+               (uap->pages_reclaimed) ? &pages_reclaimed : NULL,
+               &pages_wanted);

 
 

-       data_vp = nd_data.ni_vp;
-       VOP_UNLOCK(data_vp, 0, p);
-
-       if (error = vn_open(&nd_names, 
-                       O_CREAT | O_EXCL | FWRITE, S_IRUSR|S_IWUSR)) {
-                       printf("prepare_profile_database: Can't create CacheNames %s\n",
-                               profile_data_string);
-                       kmem_free(kernel_map, 
-                                       (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, PATH_MAX);
-                       vrele(data_vp);
-                       return error;
+       switch (kr) {
+       case KERN_SUCCESS:
+               break;
+       case KERN_ABORTED:
+               return EINTR;
+       default:
+               return EINVAL;

        }
 
        }
 

-       names_vp = nd_names.ni_vp;
-
-
-       /* Write Header for new names file */
-
-       profile_header = (struct profile_names_header *)names_buf;
-
-       profile_header->number_of_profiles = 0;
-       profile_header->user_id =  user;
-       profile_header->version = 1;
-       profile_header->element_array = 
-                               sizeof(struct profile_names_header);
-       profile_header->spare1 = 0;
-       profile_header->spare2 = 0;
-       profile_header->spare3 = 0;
-
-       size = sizeof(struct profile_names_header);
-       buf_ptr = (vm_offset_t)profile_header;
-       resid_off = 0;
-
-       while(size) {
-               error = vn_rdwr(UIO_WRITE, names_vp, 
-                               (caddr_t)buf_ptr, size, resid_off,
-                               UIO_SYSSPACE, IO_NODELOCKED, 
-                               p->p_ucred, &resid, p);
-               if(error) {
-                       printf("prepare_profile_database: Can't write header %s\n", profile_names_string);
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-                       kmem_free(kernel_map, 
-                               (vm_offset_t)profile_data_string, 
-                               PATH_MAX);
-                       vput(names_vp);
-                       vrele(data_vp);
-                       return error;
+       if (uap->pages_reclaimed) {
+               if (copyout((void *)&pages_reclaimed,
+                           uap->pages_reclaimed,
+                           sizeof (pages_reclaimed)) != 0) {
+                       return EFAULT;

                }
                }

-               buf_ptr += size-resid;
-               resid_off += size-resid;
-               size = resid;

        }
 
        }
 

-       VATTR_NULL(&vattr);
-       vattr.va_uid = user;
-               error = VOP_SETATTR(names_vp, &vattr, p->p_cred->pc_ucred, p);
-       if(error) {
-               printf("prepare_profile_database: "
-                       "Can't set user %s\n", profile_names_string);
-       }
-       vput(names_vp);
-       
-       error = vn_lock(data_vp, LK_EXCLUSIVE | LK_RETRY, p);
-       if(error) {
-               vrele(data_vp);
-               printf("prepare_profile_database: cannot lock data file %s\n",
-                       profile_data_string);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)profile_data_string, PATH_MAX);
-               kmem_free(kernel_map, 
-                       (vm_offset_t)names_buf, 4 * PAGE_SIZE);
-       }
-       VATTR_NULL(&vattr);
-       vattr.va_uid = user;
-               error = VOP_SETATTR(data_vp, &vattr, p->p_cred->pc_ucred, p);
-       if(error) {
-               printf("prepare_profile_database: "
-                       "Can't set user %s\n", profile_data_string);
-       }
-       
-       vput(data_vp);
-       kmem_free(kernel_map, 
-                       (vm_offset_t)profile_data_string, PATH_MAX);
-       kmem_free(kernel_map, 
-                       (vm_offset_t)names_buf, 4 * PAGE_SIZE);
+       *retval = (int) pages_wanted;

        return 0;
        return 0;

-

 }
 }