xnu-4903.231.4.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 8bb213b61faa61d9fe83001c341da3222b90b22a..d3109c5646d200dd91160196818ea497dd02d7c4 100644 (file)
--- a/bsd/vm/vm_unix.c
+++ b/bsd/vm/vm_unix.c
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2018 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -37,15 +37,15 @@
  * is included in support of clause 2.2 (b) of the Apple Public License,
  * Version 2.0.
  */
  * is included in support of clause 2.2 (b) of the Apple Public License,
  * Version 2.0.
  */

-
-#include <meta_features.h>
+#include <vm/vm_options.h>

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

-#include <kern/lock.h>
+#include <kern/extmod_statistics.h>

 #include <mach/mach_traps.h>
 #include <mach/port.h>
 #include <mach/mach_traps.h>
 #include <mach/port.h>

+#include <mach/sdt.h>

 #include <mach/task.h>
 #include <mach/task_access.h>
 #include <mach/task_special_ports.h>
 #include <mach/task.h>
 #include <mach/task_access.h>
 #include <mach/task_special_ports.h>


@@ -74,8 +74,17 @@
 #include <sys/sysproto.h>
 #include <sys/mman.h>
 #include <sys/sysctl.h>
 #include <sys/sysproto.h>
 #include <sys/mman.h>
 #include <sys/sysctl.h>

+#include <sys/cprotect.h>
+#include <sys/kpi_socket.h>
+#include <sys/kas_info.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */

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

+#include <security/mac.h>

 #include <bsm/audit_kevents.h>
 
 #include <kern/kalloc.h>
 #include <bsm/audit_kevents.h>
 
 #include <kern/kalloc.h>


@@ -83,23 +92,195 @@
 #include <vm/vm_kern.h>
 #include <vm/vm_pageout.h>
 
 #include <vm/vm_kern.h>
 #include <vm/vm_pageout.h>
 

-#include <machine/spl.h>
-

 #include <mach/shared_region.h>
 #include <vm/vm_shared_region.h>
 
 #include <vm/vm_protos.h>
 
 #include <mach/shared_region.h>
 #include <vm/vm_shared_region.h>
 
 #include <vm/vm_protos.h>
 

+#include <sys/kern_memorystatus.h>
+
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+
+#if CONFIG_CSR
+#include <sys/csr.h>
+#endif /* CONFIG_CSR */
+
+int _shared_region_map_and_slide(struct proc*, int, unsigned int, struct shared_file_mapping_np*, uint32_t, user_addr_t, user_addr_t);
+int shared_region_copyin_mappings(struct proc*, user_addr_t, unsigned int, struct shared_file_mapping_np *);
+
+#if VM_MAP_DEBUG_APPLE_PROTECT
+SYSCTL_INT(_vm, OID_AUTO, map_debug_apple_protect, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_map_debug_apple_protect, 0, "");
+#endif /* VM_MAP_DEBUG_APPLE_PROTECT */
+
+#if VM_MAP_DEBUG_FOURK
+SYSCTL_INT(_vm, OID_AUTO, map_debug_fourk, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_map_debug_fourk, 0, "");
+#endif /* VM_MAP_DEBUG_FOURK */
+
+#if DEVELOPMENT || DEBUG
+
+static int
+sysctl_kmem_alloc_contig SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+       vm_offset_t     kaddr;
+       kern_return_t   kr;
+       int     error = 0;
+       int     size = 0;
+
+       error = sysctl_handle_int(oidp, &size, 0, req);
+       if (error || !req->newptr)
+               return (error);
+
+       kr = kmem_alloc_contig(kernel_map, &kaddr, (vm_size_t)size, 0, 0, 0, 0, VM_KERN_MEMORY_IOKIT);
+
+       if (kr == KERN_SUCCESS)
+               kmem_free(kernel_map, kaddr, size);
+
+       return error;
+}
+
+SYSCTL_PROC(_vm, OID_AUTO, kmem_alloc_contig, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+           0, 0, &sysctl_kmem_alloc_contig, "I", "");
+
+extern int vm_region_footprint;
+SYSCTL_INT(_vm, OID_AUTO, region_footprint, CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_LOCKED, &vm_region_footprint, 0, "");
+static int
+sysctl_vm_self_region_footprint SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+       int     error = 0;
+       int     value;
+
+       value = task_self_region_footprint();
+       error = SYSCTL_OUT(req, &value, sizeof (int));
+       if (error) {
+               return error;
+       }
+
+       if (!req->newptr) {
+               return 0;
+       }
+
+       error = SYSCTL_IN(req, &value, sizeof (int));
+       if (error) {
+               return (error);
+       }
+       task_self_region_footprint_set(value);
+       return 0;
+}
+SYSCTL_PROC(_vm, OID_AUTO, self_region_footprint, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_ANYBODY|CTLFLAG_LOCKED|CTLFLAG_MASKED, 0, 0, &sysctl_vm_self_region_footprint, "I", "");
+
+#endif /* DEVELOPMENT || DEBUG */
+
+
+#if CONFIG_EMBEDDED
+
+#if DEVELOPMENT || DEBUG
+extern int panic_on_unsigned_execute;
+SYSCTL_INT(_vm, OID_AUTO, panic_on_unsigned_execute, CTLFLAG_RW | CTLFLAG_LOCKED, &panic_on_unsigned_execute, 0, "");
+#endif /* DEVELOPMENT || DEBUG */
+
+extern int log_executable_mem_entry;
+extern int cs_executable_create_upl;
+extern int cs_executable_mem_entry;
+extern int cs_executable_wire;
+SYSCTL_INT(_vm, OID_AUTO, log_executable_mem_entry, CTLFLAG_RD | CTLFLAG_LOCKED, &log_executable_mem_entry, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, cs_executable_create_upl, CTLFLAG_RD | CTLFLAG_LOCKED, &cs_executable_create_upl, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, cs_executable_mem_entry, CTLFLAG_RD | CTLFLAG_LOCKED, &cs_executable_mem_entry, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, cs_executable_wire, CTLFLAG_RD | CTLFLAG_LOCKED, &cs_executable_wire, 0, "");
+#endif /* CONFIG_EMBEDDED */
+
+#if DEVELOPMENT || DEBUG
+extern int radar_20146450;
+SYSCTL_INT(_vm, OID_AUTO, radar_20146450, CTLFLAG_RW | CTLFLAG_LOCKED, &radar_20146450, 0, "");
+
+extern int macho_printf;
+SYSCTL_INT(_vm, OID_AUTO, macho_printf, CTLFLAG_RW | CTLFLAG_LOCKED, &macho_printf, 0, "");
+
+extern int apple_protect_pager_data_request_debug;
+SYSCTL_INT(_vm, OID_AUTO, apple_protect_pager_data_request_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &apple_protect_pager_data_request_debug, 0, "");
+
+#if __arm__ || __arm64__
+/* These are meant to support the page table accounting unit test. */
+extern unsigned int arm_hardware_page_size;
+extern unsigned int arm_pt_desc_size;
+extern unsigned int arm_pt_root_size;
+extern unsigned int free_page_size_tt_count;
+extern unsigned int free_two_page_size_tt_count;
+extern unsigned int free_tt_count;
+extern unsigned int inuse_user_tteroot_count;
+extern unsigned int inuse_kernel_tteroot_count;
+extern unsigned int inuse_user_ttepages_count;
+extern unsigned int inuse_kernel_ttepages_count;
+extern unsigned int inuse_user_ptepages_count;
+extern unsigned int inuse_kernel_ptepages_count;
+SYSCTL_UINT(_vm, OID_AUTO, native_hw_pagesize, CTLFLAG_RD | CTLFLAG_LOCKED, &arm_hardware_page_size, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, arm_pt_desc_size, CTLFLAG_RD | CTLFLAG_LOCKED, &arm_pt_desc_size, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, arm_pt_root_size, CTLFLAG_RD | CTLFLAG_LOCKED, &arm_pt_root_size, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, free_1page_tte_root, CTLFLAG_RD | CTLFLAG_LOCKED, &free_page_size_tt_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, free_2page_tte_root, CTLFLAG_RD | CTLFLAG_LOCKED, &free_two_page_size_tt_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, free_tte_root, CTLFLAG_RD | CTLFLAG_LOCKED, &free_tt_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, user_tte_root, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_user_tteroot_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, kernel_tte_root, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_kernel_tteroot_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, user_tte_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_user_ttepages_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, kernel_tte_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_kernel_ttepages_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, user_pte_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_user_ptepages_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, kernel_pte_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &inuse_kernel_ptepages_count, 0, "");
+#endif /* __arm__ || __arm64__ */
+
+#if __arm64__
+extern int fourk_pager_data_request_debug;
+SYSCTL_INT(_vm, OID_AUTO, fourk_pager_data_request_debug, CTLFLAG_RW | CTLFLAG_LOCKED, &fourk_pager_data_request_debug, 0, "");
+#endif /* __arm64__ */
+#endif /* DEVELOPMENT || DEBUG */
+
+SYSCTL_INT(_vm, OID_AUTO, vm_do_collapse_compressor, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.do_collapse_compressor, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_do_collapse_compressor_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.do_collapse_compressor_pages, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_do_collapse_terminate, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.do_collapse_terminate, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_do_collapse_terminate_failure, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.do_collapse_terminate_failure, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_should_cow_but_wired, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.should_cow_but_wired, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_create_upl_extra_cow, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.create_upl_extra_cow, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_create_upl_extra_cow_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.create_upl_extra_cow_pages, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_create_upl_lookup_failure_write, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.create_upl_lookup_failure_write, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, vm_create_upl_lookup_failure_copy, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_counters.create_upl_lookup_failure_copy, 0, "");
+#if VM_SCAN_FOR_SHADOW_CHAIN
+static int vm_shadow_max_enabled = 0;    /* Disabled by default */
+extern int proc_shadow_max(void);
+static int
+vm_shadow_max SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+       int value = 0;
+
+       if (vm_shadow_max_enabled)
+               value = proc_shadow_max();
+
+       return SYSCTL_OUT(req, &value, sizeof(value));
+}
+SYSCTL_PROC(_vm, OID_AUTO, vm_shadow_max, CTLTYPE_INT|CTLFLAG_RD|CTLFLAG_LOCKED,
+    0, 0, &vm_shadow_max, "I", "");
+
+SYSCTL_INT(_vm, OID_AUTO, vm_shadow_max_enabled, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_shadow_max_enabled, 0, "");
+
+#endif /* VM_SCAN_FOR_SHADOW_CHAIN */
+
+SYSCTL_INT(_vm, OID_AUTO, vm_debug_events, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_debug_events, 0, "");
+
+__attribute__((noinline)) int __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__(
+       mach_port_t task_access_port, int32_t calling_pid, uint32_t calling_gid, int32_t target_pid);

 /*
  * Sysctl's related to data/stack execution.  See osfmk/vm/vm_map.c
  */
 
 /*
  * Sysctl's related to data/stack execution.  See osfmk/vm/vm_map.c
  */
 

-#ifndef SECURE_KERNEL
+#if DEVELOPMENT || DEBUG

 extern int allow_stack_exec, allow_data_exec;
 
 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 */
+SYSCTL_INT(_vm, OID_AUTO, allow_stack_exec, CTLFLAG_RW | CTLFLAG_LOCKED, &allow_stack_exec, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, allow_data_exec, CTLFLAG_RW | CTLFLAG_LOCKED, &allow_data_exec, 0, "");
+
+#endif /* DEVELOPMENT || DEBUG */

 
 static const char *prot_values[] = {
        "none",
 
 static const char *prot_values[] = {
        "none",


@@ -119,42 +300,95 @@ log_stack_execution_failure(addr64_t vaddr, vm_prot_t prot)
                current_proc()->p_comm, current_proc()->p_pid, vaddr, prot_values[prot & VM_PROT_ALL]);
 }
 
                current_proc()->p_comm, current_proc()->p_pid, vaddr, prot_values[prot & VM_PROT_ALL]);
 }
 

+/*
+ * shared_region_unnest_logging: level of logging of unnesting events
+ * 0   - no logging
+ * 1   - throttled logging of unexpected unnesting events (default)
+ * 2   - unthrottled logging of unexpected unnesting events
+ * 3+  - unthrottled logging of all unnesting events
+ */

 int shared_region_unnest_logging = 1;
 
 int shared_region_unnest_logging = 1;
 

-SYSCTL_INT(_vm, OID_AUTO, shared_region_unnest_logging, CTLFLAG_RW,
+SYSCTL_INT(_vm, OID_AUTO, shared_region_unnest_logging, CTLFLAG_RW | CTLFLAG_LOCKED,

           &shared_region_unnest_logging, 0, "");
 
 int vm_shared_region_unnest_log_interval = 10;
 int shared_region_unnest_log_count_threshold = 5;
 
           &shared_region_unnest_logging, 0, "");
 
 int vm_shared_region_unnest_log_interval = 10;
 int shared_region_unnest_log_count_threshold = 5;
 

+/*
+ * Shared cache path enforcement.
+ */
+
+#ifndef CONFIG_EMBEDDED
+static int scdir_enforce = 1;
+static char scdir_path[] = "/var/db/dyld/";
+#else
+static int scdir_enforce = 0;
+static char scdir_path[] = "/System/Library/Caches/com.apple.dyld/";
+#endif
+
+#ifndef SECURE_KERNEL
+static int sysctl_scdir_enforce SYSCTL_HANDLER_ARGS
+{
+#if CONFIG_CSR
+       if (csr_check(CSR_ALLOW_UNRESTRICTED_FS) != 0) {
+               printf("Failed attempt to set vm.enforce_shared_cache_dir sysctl\n");
+               return EPERM;
+       }
+#endif /* CONFIG_CSR */
+       return sysctl_handle_int(oidp, arg1, arg2, req);
+}
+
+SYSCTL_PROC(_vm, OID_AUTO, enforce_shared_cache_dir, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &scdir_enforce, 0, sysctl_scdir_enforce, "I", "");
+#endif
+

 /* 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;
 
 /* 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;
+void
+log_unnest_badness(
+       vm_map_t        m,
+       vm_map_offset_t s,
+       vm_map_offset_t e,
+       boolean_t       is_nested_map,
+       vm_map_offset_t lowest_unnestable_addr)
+{
+       struct timeval  tv;

 
        if (shared_region_unnest_logging == 0)
                return;
 
 
        if (shared_region_unnest_logging == 0)
                return;
 

-       if (shared_region_unnest_logging == 1) {
+       if (shared_region_unnest_logging <= 2 &&
+           is_nested_map &&
+           s >= lowest_unnestable_addr) {
+               /*
+                * Unnesting of writable map entries is fine.
+                */
+               return;
+       }
+
+       if (shared_region_unnest_logging <= 1) {

                microtime(&tv);
                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)
+               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;
                                return;

-               }
-               else {
+               } else {

                        last_unnest_log_time = tv.tv_sec;
                        shared_region_unnest_log_count = 0;
                }
        }
 
                        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);
+       DTRACE_VM4(log_unnest_badness,
+                  vm_map_t, m,
+                  vm_map_offset_t, s,
+                  vm_map_offset_t, e,
+                  vm_map_offset_t, lowest_unnestable_addr);
+       printf("%s[%d] triggered unnest of range 0x%qx->0x%qx of DYLD shared region in VM map %p. While not abnormal for debuggers, this increases system memory footprint until the target exits.\n", current_proc()->p_comm, current_proc()->p_pid, (uint64_t)s, (uint64_t)e, (void *) VM_KERNEL_ADDRPERM(m));

 }
 
 int
 }
 
 int


@@ -163,9 +397,15 @@ useracc(
        user_size_t     len,
        int     prot)
 {
        user_size_t     len,
        int     prot)
 {

+       vm_map_t        map;
+
+       map = current_map();

        return (vm_map_check_protection(
        return (vm_map_check_protection(

-                       current_map(),
-                       vm_map_trunc_page(addr), vm_map_round_page(addr+len),
+                       map,
+                       vm_map_trunc_page(addr,
+                                         vm_map_page_mask(map)),
+                       vm_map_round_page(addr+len,
+                                         vm_map_page_mask(map)),

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


@@ -174,10 +414,17 @@ vslock(
        user_addr_t     addr,
        user_size_t     len)
 {
        user_addr_t     addr,
        user_size_t     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);
+       kern_return_t   kret;
+       vm_map_t        map;
+
+       map = current_map();
+       kret = vm_map_wire_kernel(map,
+                          vm_map_trunc_page(addr,
+                                            vm_map_page_mask(map)),
+                          vm_map_round_page(addr+len,
+                                            vm_map_page_mask(map)), 
+                          VM_PROT_READ | VM_PROT_WRITE, VM_KERN_MEMORY_BSD,
+                          FALSE);

 
        switch (kret) {
        case KERN_SUCCESS:
 
        switch (kret) {
        case KERN_SUCCESS:


@@ -204,14 +451,17 @@ vsunlock(
        vm_map_offset_t vaddr;
        ppnum_t         paddr;
 #endif  /* FIXME ] */
        vm_map_offset_t vaddr;
        ppnum_t         paddr;
 #endif  /* FIXME ] */

-       kern_return_t kret;
+       kern_return_t   kret;
+       vm_map_t        map;
+
+       map = current_map();

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

-               for (vaddr = vm_map_trunc_page(addr);
-                    vaddr < vm_map_round_page(addr+len);
-                               vaddr += PAGE_SIZE) {
+               for (vaddr = vm_map_trunc_page(addr, PAGE_MASK);
+                    vaddr < vm_map_round_page(addr+len, PAGE_MASK);
+                    vaddr += PAGE_SIZE) {

                        paddr = pmap_extract(pmap, vaddr);
                        pg = PHYS_TO_VM_PAGE(paddr);
                        vm_page_set_modified(pg);
                        paddr = pmap_extract(pmap, vaddr);
                        pg = PHYS_TO_VM_PAGE(paddr);
                        vm_page_set_modified(pg);


@@ -221,8 +471,12 @@ vsunlock(
 #ifdef lint
        dirtied++;
 #endif /* lint */
 #ifdef lint
        dirtied++;
 #endif /* lint */

-       kret = vm_map_unwire(current_map(), vm_map_trunc_page(addr),
-                               vm_map_round_page(addr+len), FALSE);
+       kret = vm_map_unwire(map,
+                            vm_map_trunc_page(addr,
+                                              vm_map_page_mask(map)),
+                            vm_map_round_page(addr+len,
+                                              vm_map_page_mask(map)),
+                            FALSE);

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


@@ -403,7 +657,7 @@ pid_for_task(
        AUDIT_MACH_SYSCALL_ENTER(AUE_PIDFORTASK);
        AUDIT_ARG(mach_port1, t);
 
        AUDIT_MACH_SYSCALL_ENTER(AUE_PIDFORTASK);
        AUDIT_ARG(mach_port1, t);
 

-       t1 = port_name_to_task(t);
+       t1 = port_name_to_task_inspect(t);

 
        if (t1 == TASK_NULL) {
                err = KERN_FAILURE;
 
        if (t1 == TASK_NULL) {
                err = KERN_FAILURE;


@@ -413,7 +667,10 @@ pid_for_task(
                if (p) {
                        pid  = proc_pid(p);
                        err = KERN_SUCCESS;
                if (p) {
                        pid  = proc_pid(p);
                        err = KERN_SUCCESS;

-               } else {
+               } else if (is_corpsetask(t1)) {
+                       pid = task_pid(t1);
+                       err = KERN_SUCCESS;
+               }else {

                        err = KERN_FAILURE;
                }
        }
                        err = KERN_FAILURE;
                }
        }


@@ -458,7 +715,7 @@ task_for_pid_posix_check(proc_t target)
        int allowed; 
 
        /* No task_for_pid on bad targets */
        int allowed; 
 
        /* No task_for_pid on bad targets */

-       if (target == PROC_NULL || target->p_stat == SZOMB) {
+       if (target->p_stat == SZOMB) {

                return FALSE;
        }
 
                return FALSE;
        }
 


@@ -486,8 +743,8 @@ task_for_pid_posix_check(proc_t target)
 
        /* Do target's ruid, euid, and saved uid match my euid? */
        if ((kauth_cred_getuid(targetcred) != myuid) || 
 
        /* 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)) {
+                       (kauth_cred_getruid(targetcred) != myuid) ||
+                       (kauth_cred_getsvuid(targetcred) != myuid)) {

                allowed = FALSE;
                goto out;
        }
                allowed = FALSE;
                goto out;
        }


@@ -510,6 +767,19 @@ out:
        return allowed;
 }
 
        return allowed;
 }
 

+/*
+ *     __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__
+ *
+ *     Description:    Waits for the user space daemon to respond to the request
+ *                     we made. Function declared non inline to be visible in
+ *                     stackshots and spindumps as well as debugging.
+ */
+__attribute__((noinline)) int __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__(
+       mach_port_t task_access_port, int32_t calling_pid, uint32_t calling_gid, int32_t target_pid)
+{
+       return check_task_access(task_access_port, calling_pid, calling_gid, target_pid);
+}
+

 /*
  *     Routine:        task_for_pid
  *     Purpose:
 /*
  *     Routine:        task_for_pid
  *     Purpose:


@@ -532,8 +802,9 @@ task_for_pid(
        user_addr_t             task_addr = args->t;
        proc_t                  p = PROC_NULL;
        task_t                  t1 = TASK_NULL;
        user_addr_t             task_addr = args->t;
        proc_t                  p = PROC_NULL;
        task_t                  t1 = TASK_NULL;

+       task_t                  task = TASK_NULL;

        mach_port_name_t        tret = MACH_PORT_NULL;
        mach_port_name_t        tret = MACH_PORT_NULL;

-       ipc_port_t              tfpport;
+       ipc_port_t              tfpport = MACH_PORT_NULL;

        void * sright;
        int error = 0;
 
        void * sright;
        int error = 0;
 


@@ -557,9 +828,13 @@ task_for_pid(
 
 
        p = proc_find(pid);
 
 
        p = proc_find(pid);

+       if (p == PROC_NULL) {
+               error = KERN_FAILURE;
+               goto tfpout;
+       }
+

 #if CONFIG_AUDIT
 #if CONFIG_AUDIT

-       if (p != PROC_NULL)
-               AUDIT_ARG(process, p);
+       AUDIT_ARG(process, p);

 #endif
 
        if (!(task_for_pid_posix_check(p))) {
 #endif
 
        if (!(task_for_pid_posix_check(p))) {


@@ -567,50 +842,86 @@ task_for_pid(
                goto tfpout;
        }
 
                goto tfpout;
        }
 

-       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)) {
+       if (p->task == TASK_NULL) {
+               error = KERN_SUCCESS;
+               goto tfpout;
+       }

 
 

-                       if (tfpport == IPC_PORT_DEAD) {
-                               error = KERN_PROTECTION_FAILURE;
-                               goto tfpout;
-                       }
+#if CONFIG_MACF
+       error = mac_proc_check_get_task(kauth_cred_get(), p);
+       if (error) {
+               error = KERN_FAILURE;
+               goto tfpout;
+       }
+#endif

 
 

-                       /* Call up to the task access server */
-                       error = check_task_access(tfpport, proc_selfpid(), kauth_getgid(), pid);
+       /* Grab a task reference since the proc ref might be dropped if an upcall to task access server is made */
+       task = p->task;
+       task_reference(task);

 
 

-                       if (error != MACH_MSG_SUCCESS) {
-                               if (error == MACH_RCV_INTERRUPTED)
-                                       error = KERN_ABORTED;
-                               else
-                                       error = KERN_FAILURE;
-                               goto tfpout;
-                       }
+       /* 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(task, &tfpport) == 0) &&
+               (tfpport != IPC_PORT_NULL)) {
+
+               if (tfpport == IPC_PORT_DEAD) {
+                       error = KERN_PROTECTION_FAILURE;
+                       goto tfpout;

                }
                }

-#if CONFIG_MACF
-               error = mac_proc_check_get_task(kauth_cred_get(), p);
-               if (error) {
-                       error = KERN_FAILURE;
+
+               /*
+                * Drop the proc_find proc ref before making an upcall
+                * to taskgated, since holding a proc_find
+                * ref while making an upcall can cause deadlock.
+                */
+               proc_rele(p);
+               p = PROC_NULL;
+
+               /* Call up to the task access server */
+               error = __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__(tfpport, proc_selfpid(), kauth_getgid(), pid);
+
+               if (error != MACH_MSG_SUCCESS) {
+                       if (error == MACH_RCV_INTERRUPTED)
+                               error = KERN_ABORTED;
+                       else
+                               error = KERN_FAILURE;

                        goto tfpout;
                }
                        goto tfpout;
                }

-#endif
+       }
+
+       /* Grant task port access */
+       extmod_statistics_incr_task_for_pid(task);
+       sright = (void *) convert_task_to_port(task);
+
+       /* Check if the task has been corpsified */
+       if (is_corpsetask(task)) {
+               /* task ref consumed by convert_task_to_port */
+               task = TASK_NULL;
+               ipc_port_release_send(sright);
+               error = KERN_FAILURE;
+               goto tfpout;
+       }
+
+       /* task ref consumed by convert_task_to_port */
+       task = TASK_NULL;
+       tret = ipc_port_copyout_send(
+                       sright,
+                       get_task_ipcspace(current_task()));

 
 

-               /* 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;
 
 tfpout:
        task_deallocate(t1);
        AUDIT_ARG(mach_port2, tret);
        (void) copyout((char *) &tret, task_addr, sizeof(mach_port_name_t));
        error = KERN_SUCCESS;
 
 tfpout:
        task_deallocate(t1);
        AUDIT_ARG(mach_port2, tret);
        (void) copyout((char *) &tret, task_addr, sizeof(mach_port_name_t));

+
+       if (tfpport != IPC_PORT_NULL) {
+               ipc_port_release_send(tfpport);
+       }
+       if (task != TASK_NULL) {
+               task_deallocate(task);
+       }

        if (p != PROC_NULL)
                proc_rele(p);
        AUDIT_MACH_SYSCALL_EXIT(error);
        if (p != PROC_NULL)
                proc_rele(p);
        AUDIT_MACH_SYSCALL_EXIT(error);


@@ -664,7 +975,7 @@ task_name_for_pid(
                    && ((current_proc() == p)
                        || kauth_cred_issuser(kauth_cred_get()) 
                        || ((kauth_cred_getuid(target_cred) == kauth_cred_getuid(kauth_cred_get())) && 
                    && ((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))))) {
+                           ((kauth_cred_getruid(target_cred) == kauth_getruid()))))) {

 
                        if (p->task != TASK_NULL) {
                                task_reference(p->task);
 
                        if (p->task != TASK_NULL) {
                                task_reference(p->task);


@@ -705,6 +1016,386 @@ tnfpout:
        return(error);
 }
 
        return(error);
 }
 

+kern_return_t
+pid_suspend(struct proc *p __unused, struct pid_suspend_args *args, int *ret)
+{
+       task_t  target = NULL;
+       proc_t  targetproc = PROC_NULL;
+       int     pid = args->pid;
+       int     error = 0;
+
+#if CONFIG_MACF
+       error = mac_proc_check_suspend_resume(p, MAC_PROC_CHECK_SUSPEND);
+       if (error) {
+               error = EPERM;
+               goto out;
+       }
+#endif
+
+       if (pid == 0) {
+               error = EPERM;
+               goto out;
+       }
+
+       targetproc = proc_find(pid);
+       if (targetproc == PROC_NULL) {
+               error = ESRCH;
+               goto out;
+       }
+
+       if (!task_for_pid_posix_check(targetproc)) {
+               error = EPERM;
+               goto out;
+       }
+
+       target = targetproc->task;
+#ifndef CONFIG_EMBEDDED
+       if (target != TASK_NULL) {
+               mach_port_t tfpport;
+
+               /* If we aren't root and target's task access port is set... */
+               if (!kauth_cred_issuser(kauth_cred_get()) &&
+                       targetproc != current_proc() &&
+                       (task_get_task_access_port(target, &tfpport) == 0) &&
+                       (tfpport != IPC_PORT_NULL)) {
+
+                       if (tfpport == IPC_PORT_DEAD) {
+                               error = EACCES;
+                               goto out;
+                       }
+
+                       /* Call up to the task access server */
+                       error = __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__(tfpport, proc_selfpid(), kauth_getgid(), pid);
+
+                       if (error != MACH_MSG_SUCCESS) {
+                               if (error == MACH_RCV_INTERRUPTED)
+                                       error = EINTR;
+                               else
+                                       error = EPERM;
+                               goto out;
+                       }
+               }
+       }
+#endif
+
+       task_reference(target);
+       error = task_pidsuspend(target);
+       if (error) {
+               if (error == KERN_INVALID_ARGUMENT) {
+                       error = EINVAL;
+               } else {
+                       error = EPERM;
+               }
+       }
+#if CONFIG_MEMORYSTATUS
+       else {
+               memorystatus_on_suspend(targetproc);
+       }
+#endif
+
+       task_deallocate(target);
+
+out:
+       if (targetproc != PROC_NULL)
+               proc_rele(targetproc);
+       *ret = error;
+       return error;
+}
+
+kern_return_t
+pid_resume(struct proc *p __unused, struct pid_resume_args *args, int *ret)
+{
+       task_t  target = NULL;
+       proc_t  targetproc = PROC_NULL;
+       int     pid = args->pid;
+       int     error = 0;
+
+#if CONFIG_MACF
+       error = mac_proc_check_suspend_resume(p, MAC_PROC_CHECK_RESUME);
+       if (error) {
+               error = EPERM;
+               goto out;
+       }
+#endif
+
+       if (pid == 0) {
+               error = EPERM;
+               goto out;
+       }
+
+       targetproc = proc_find(pid);
+       if (targetproc == PROC_NULL) {
+               error = ESRCH;
+               goto out;
+       }
+
+       if (!task_for_pid_posix_check(targetproc)) {
+               error = EPERM;
+               goto out;
+       }
+
+       target = targetproc->task;
+#ifndef CONFIG_EMBEDDED
+       if (target != TASK_NULL) {
+               mach_port_t tfpport;
+
+               /* If we aren't root and target's task access port is set... */
+               if (!kauth_cred_issuser(kauth_cred_get()) &&
+                       targetproc != current_proc() &&
+                       (task_get_task_access_port(target, &tfpport) == 0) &&
+                       (tfpport != IPC_PORT_NULL)) {
+
+                       if (tfpport == IPC_PORT_DEAD) {
+                               error = EACCES;
+                               goto out;
+                       }
+
+                       /* Call up to the task access server */
+                       error = __KERNEL_WAITING_ON_TASKGATED_CHECK_ACCESS_UPCALL__(tfpport, proc_selfpid(), kauth_getgid(), pid);
+
+                       if (error != MACH_MSG_SUCCESS) {
+                               if (error == MACH_RCV_INTERRUPTED)
+                                       error = EINTR;
+                               else
+                                       error = EPERM;
+                               goto out;
+                       }
+               }
+       }
+#endif
+
+#if CONFIG_EMBEDDED
+#if SOCKETS
+       resume_proc_sockets(targetproc);
+#endif /* SOCKETS */
+#endif /* CONFIG_EMBEDDED */
+
+       task_reference(target);
+
+#if CONFIG_MEMORYSTATUS
+       memorystatus_on_resume(targetproc);
+#endif
+
+       error = task_pidresume(target);
+       if (error) {
+               if (error == KERN_INVALID_ARGUMENT) {
+                       error = EINVAL;
+               } else {
+                       if (error == KERN_MEMORY_ERROR) {
+                               psignal(targetproc, SIGKILL);
+                               error = EIO;
+                       } else
+                               error = EPERM;
+               }
+       }
+       
+       task_deallocate(target);
+
+out:
+       if (targetproc != PROC_NULL)
+               proc_rele(targetproc);
+       
+       *ret = error;
+       return error;
+}
+
+#if CONFIG_EMBEDDED
+/*
+ * Freeze the specified process (provided in args->pid), or find and freeze a PID.
+ * When a process is specified, this call is blocking, otherwise we wake up the
+ * freezer thread and do not block on a process being frozen.
+ */
+kern_return_t
+pid_hibernate(struct proc *p __unused, struct pid_hibernate_args *args, int *ret)
+{
+       int     error = 0;
+       proc_t  targetproc = PROC_NULL;
+       int     pid = args->pid;
+
+#ifndef CONFIG_FREEZE
+       #pragma unused(pid)
+#else
+
+#if CONFIG_MACF
+       error = mac_proc_check_suspend_resume(p, MAC_PROC_CHECK_HIBERNATE);
+       if (error) {
+               error = EPERM;
+               goto out;
+       }
+#endif
+
+       /*
+        * If a pid has been provided, we obtain the process handle and call task_for_pid_posix_check().
+        */
+
+       if (pid >= 0) {
+               targetproc = proc_find(pid);
+
+               if (targetproc == PROC_NULL) {
+                       error = ESRCH;
+                       goto out;
+               }
+
+               if (!task_for_pid_posix_check(targetproc)) {
+                       error = EPERM;
+                       goto out;
+               }
+       }
+
+       if (pid == -2) {
+               vm_pageout_anonymous_pages();
+       } else if (pid == -1) {
+               memorystatus_on_inactivity(targetproc);
+       } else {
+               error = memorystatus_freeze_process_sync(targetproc);
+       }
+
+out:
+
+#endif /* CONFIG_FREEZE */
+
+       if (targetproc != PROC_NULL)
+               proc_rele(targetproc);
+       *ret = error;
+       return error;
+}
+#endif /* CONFIG_EMBEDDED */
+
+#if SOCKETS
+int
+networking_memstatus_callout(proc_t p, uint32_t status)
+{
+       struct filedesc *fdp;
+       int i;
+
+       /*
+        * proc list lock NOT held
+        * proc lock NOT held
+        * a reference on the proc has been held / shall be dropped by the caller.
+        */
+       LCK_MTX_ASSERT(proc_list_mlock, LCK_MTX_ASSERT_NOTOWNED);
+       LCK_MTX_ASSERT(&p->p_mlock, LCK_MTX_ASSERT_NOTOWNED);
+
+       proc_fdlock(p);
+       fdp = p->p_fd;
+       for (i = 0; i < fdp->fd_nfiles; i++) {
+               struct fileproc *fp;
+
+               fp = fdp->fd_ofiles[i];
+               if (fp == NULL || (fdp->fd_ofileflags[i] & UF_RESERVED) != 0) {
+                       continue;
+               }
+               switch (FILEGLOB_DTYPE(fp->f_fglob)) {
+#if NECP
+               case DTYPE_NETPOLICY:
+                       necp_fd_memstatus(p, status,
+                           (struct necp_fd_data *)fp->f_fglob->fg_data);
+                       break;
+#endif /* NECP */
+               default:
+                       break;
+               }
+       }
+       proc_fdunlock(p);
+
+       return (1);
+}
+
+
+static int
+networking_defunct_callout(proc_t p, void *arg)
+{
+       struct pid_shutdown_sockets_args *args = arg;
+       int pid = args->pid;
+       int level = args->level;
+       struct filedesc *fdp;
+       int i;
+
+       proc_fdlock(p);
+       fdp = p->p_fd;
+       for (i = 0; i < fdp->fd_nfiles; i++) {
+               struct fileproc *fp = fdp->fd_ofiles[i];
+               struct fileglob *fg;
+
+               if (fp == NULL || (fdp->fd_ofileflags[i] & UF_RESERVED) != 0) {
+                       continue;
+               }
+
+               fg = fp->f_fglob;
+               switch (FILEGLOB_DTYPE(fg)) {
+               case DTYPE_SOCKET: {
+                       struct socket *so = (struct socket *)fg->fg_data;
+                       if (p->p_pid == pid || so->last_pid == pid || 
+                           ((so->so_flags & SOF_DELEGATED) && so->e_pid == pid)) {
+                               /* Call networking stack with socket and level */
+                               (void) socket_defunct(p, so, level);
+                       }
+                       break;
+               }
+#if NECP
+               case DTYPE_NETPOLICY:
+                       /* first pass: defunct necp and get stats for ntstat */
+                       if (p->p_pid == pid) {
+                               necp_fd_defunct(p,
+                                   (struct necp_fd_data *)fg->fg_data);
+                       }
+                       break;
+#endif /* NECP */
+               default:
+                       break;
+               }
+       }
+
+       proc_fdunlock(p);
+
+       return (PROC_RETURNED);
+}
+
+int
+pid_shutdown_sockets(struct proc *p __unused, struct pid_shutdown_sockets_args *args, int *ret)
+{
+       int                             error = 0;
+       proc_t                          targetproc = PROC_NULL;
+       int                             pid = args->pid;
+       int                             level = args->level;
+
+       if (level != SHUTDOWN_SOCKET_LEVEL_DISCONNECT_SVC &&
+           level != SHUTDOWN_SOCKET_LEVEL_DISCONNECT_ALL) {
+               error = EINVAL;
+               goto out;
+       }
+
+#if CONFIG_MACF
+       error = mac_proc_check_suspend_resume(p, MAC_PROC_CHECK_SHUTDOWN_SOCKETS);
+       if (error) {
+               error = EPERM;
+               goto out;
+       }
+#endif
+
+       targetproc = proc_find(pid);
+       if (targetproc == PROC_NULL) {
+               error = ESRCH;
+               goto out;
+       }
+
+       if (!task_for_pid_posix_check(targetproc)) {
+               error = EPERM;
+               goto out;
+       }
+
+       proc_iterate(PROC_ALLPROCLIST | PROC_NOWAITTRANS,
+           networking_defunct_callout, args, NULL, NULL);
+
+out:
+       if (targetproc != PROC_NULL)
+               proc_rele(targetproc);
+       *ret = error;
+       return error;
+}
+
+#endif /* SOCKETS */
+

 static int
 sysctl_settfp_policy(__unused struct sysctl_oid *oidp, void *arg1,
     __unused int arg2, struct sysctl_req *req)
 static int
 sysctl_settfp_policy(__unused struct sysctl_oid *oidp, void *arg1,
     __unused int arg2, struct sysctl_req *req)


@@ -716,7 +1407,7 @@ sysctl_settfp_policy(__unused struct sysctl_oid *oidp, void *arg1,
     if (error || req->newptr == USER_ADDR_NULL)
         return(error);
 
     if (error || req->newptr == USER_ADDR_NULL)
         return(error);
 

-       if (!is_suser())
+       if (!kauth_cred_issuser(kauth_cred_get()))

                return(EPERM);
 
        if ((error = SYSCTL_IN(req, &new_value, sizeof(int)))) {
                return(EPERM);
 
        if ((error = SYSCTL_IN(req, &new_value, sizeof(int)))) {


@@ -738,17 +1429,17 @@ static int kern_secure_kernel = 1;
 static int kern_secure_kernel = 0;
 #endif
 
 static int kern_secure_kernel = 0;
 #endif
 

-SYSCTL_INT(_kern, OID_AUTO, secure_kernel, CTLFLAG_RD, &kern_secure_kernel, 0, "");
+SYSCTL_INT(_kern, OID_AUTO, secure_kernel, CTLFLAG_RD | CTLFLAG_LOCKED, &kern_secure_kernel, 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,
+SYSCTL_NODE(_kern, KERN_TFP, tfp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "tfp");
+SYSCTL_PROC(_kern_tfp, KERN_TFP_POLICY, policy, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,

     &tfp_policy, sizeof(uint32_t), &sysctl_settfp_policy ,"I","policy");
 
     &tfp_policy, sizeof(uint32_t), &sysctl_settfp_policy ,"I","policy");
 

-SYSCTL_INT(_vm, OID_AUTO, shared_region_trace_level, CTLFLAG_RW,
+SYSCTL_INT(_vm, OID_AUTO, shared_region_trace_level, CTLFLAG_RW | CTLFLAG_LOCKED,

           &shared_region_trace_level, 0, "");
           &shared_region_trace_level, 0, "");

-SYSCTL_INT(_vm, OID_AUTO, shared_region_version, CTLFLAG_RD,
+SYSCTL_INT(_vm, OID_AUTO, shared_region_version, CTLFLAG_RD | CTLFLAG_LOCKED,

           &shared_region_version, 0, "");
           &shared_region_version, 0, "");

-SYSCTL_INT(_vm, OID_AUTO, shared_region_persistence, CTLFLAG_RW,
+SYSCTL_INT(_vm, OID_AUTO, shared_region_persistence, CTLFLAG_RW | CTLFLAG_LOCKED,

           &shared_region_persistence, 0, "");
 
 /*
           &shared_region_persistence, 0, "");
 
 /*


@@ -784,13 +1475,14 @@ shared_region_check_np(
        __unused int                            *retvalp)
 {
        vm_shared_region_t      shared_region;
        __unused int                            *retvalp)
 {
        vm_shared_region_t      shared_region;

-       mach_vm_offset_t        start_address;
+       mach_vm_offset_t        start_address = 0;

        int                     error;
        kern_return_t           kr;
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] -> check_np(0x%llx)\n",
        int                     error;
        kern_return_t           kr;
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] -> check_np(0x%llx)\n",

-                current_thread(), p->p_pid, p->p_comm,
+                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                p->p_pid, p->p_comm,

                 (uint64_t)uap->start_address));
 
        /* retrieve the current tasks's shared region */
                 (uint64_t)uap->start_address));
 
        /* retrieve the current tasks's shared region */


@@ -811,7 +1503,8 @@ shared_region_check_np(
                                        ("shared_region: %p [%d(%s)] "
                                         "check_np(0x%llx) "
                                         "copyout(0x%llx) error %d\n",
                                        ("shared_region: %p [%d(%s)] "
                                         "check_np(0x%llx) "
                                         "copyout(0x%llx) error %d\n",

-                                        current_thread(), p->p_pid, p->p_comm,
+                                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                                        p->p_pid, p->p_comm,

                                         (uint64_t)uap->start_address, (uint64_t)start_address,
                                         error));
                        }
                                         (uint64_t)uap->start_address, (uint64_t)start_address,
                                         error));
                        }


@@ -824,12 +1517,39 @@ shared_region_check_np(
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] check_np(0x%llx) <- 0x%llx %d\n",
 
        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,
+                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                p->p_pid, p->p_comm,

                 (uint64_t)uap->start_address, (uint64_t)start_address, error));
 
        return error;
 }
 
                 (uint64_t)uap->start_address, (uint64_t)start_address, error));
 
        return error;
 }
 

+
+int
+shared_region_copyin_mappings(
+               struct proc                     *p,
+               user_addr_t                     user_mappings,
+               unsigned int                    mappings_count,
+               struct shared_file_mapping_np   *mappings)
+{
+       int             error = 0;
+       vm_size_t       mappings_size = 0;
+
+       /* get the list of mappings the caller wants us to establish */
+       mappings_size = (vm_size_t) (mappings_count * sizeof (mappings[0]));
+       error = copyin(user_mappings,
+                      mappings,
+                      mappings_size);
+       if (error) {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(): "
+                        "copyin(0x%llx, %d) failed (error=%d)\n",
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (uint64_t)user_mappings, mappings_count, error));
+       }
+       return error;
+}

 /*
  * shared_region_map_np()
  *
 /*
  * shared_region_map_np()
  *


@@ -841,41 +1561,38 @@ shared_region_check_np(
  * requiring any further setup.
  */
 int
  * requiring any further setup.
  */
 int

-shared_region_map_np(
+_shared_region_map_and_slide(

        struct proc                             *p,
        struct proc                             *p,

-       struct shared_region_map_np_args        *uap,
-       __unused int                            *retvalp)
+       int                                     fd,
+       uint32_t                                mappings_count,
+       struct shared_file_mapping_np           *mappings,
+       uint32_t                                slide,
+       user_addr_t                             slide_start,
+       user_addr_t                             slide_size)

 {
        int                             error;
        kern_return_t                   kr;
 {
        int                             error;
        kern_return_t                   kr;

-       int                             fd;

        struct fileproc                 *fp;
        struct fileproc                 *fp;

-       struct vnode                    *vp, *root_vp;
+       struct vnode                    *vp, *root_vp, *scdir_vp;

        struct vnode_attr               va;
        off_t                           fs;
        memory_object_size_t            file_size;
        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;
+#if CONFIG_MACF
+       vm_prot_t                       maxprot = VM_PROT_ALL;
+#endif

        memory_object_control_t         file_control;
        struct vm_shared_region         *shared_region;
        memory_object_control_t         file_control;
        struct vm_shared_region         *shared_region;

+       uint32_t                        i;

 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] -> map\n",
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] -> map\n",

-                current_thread(), p->p_pid, p->p_comm));
+                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                p->p_pid, p->p_comm));

 
        shared_region = NULL;
 
        shared_region = NULL;

-       mappings_count = 0;
-       mappings_size = 0;
-       mappings = NULL;

        fp = NULL;
        vp = NULL;
        fp = NULL;
        vp = NULL;

-
-       /* get file descriptor for shared region cache file */
-       fd = uap->fd;
+       scdir_vp = NULL;

 
        /* get file structure from file descriptor */
        error = fp_lookup(p, fd, &fp, 0);
 
        /* get file structure from file descriptor */
        error = fp_lookup(p, fd, &fp, 0);


@@ -883,17 +1600,19 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map: "
                         "fd=%d lookup failed (error=%d)\n",
                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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm, fd, error));

                goto done;
        }
 
        /* make sure we're attempting to map a vnode */
                goto done;
        }
 
        /* make sure we're attempting to map a vnode */

-       if (fp->f_fglob->fg_type != DTYPE_VNODE) {
+       if (FILEGLOB_DTYPE(fp->f_fglob) != DTYPE_VNODE) {

                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map: "
                         "fd=%d not a vnode (type=%d)\n",
                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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        fd, FILEGLOB_DTYPE(fp->f_fglob)));

                error = EINVAL;
                goto done;
        }
                error = EINVAL;
                goto done;
        }


@@ -903,7 +1622,8 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map: "
                         "fd=%d not readable\n",
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map: "
                         "fd=%d not readable\n",

-                        current_thread(), p->p_pid, p->p_comm, fd));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm, fd));

                error = EPERM;
                goto done;
        }
                error = EPERM;
                goto done;
        }


@@ -914,7 +1634,8 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map: "
                         "fd=%d getwithref failed (error=%d)\n",
                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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm, fd, error));

                goto done;
        }
        vp = (struct vnode *) fp->f_fglob->fg_data;
                goto done;
        }
        vp = (struct vnode *) fp->f_fglob->fg_data;


@@ -924,23 +1645,43 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map(%p:'%s'): "
                         "not a file (type=%d)\n",
                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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp),
+                        vp->v_name, vp->v_type));

                error = EINVAL;
                goto done;
        }
 
                error = EINVAL;
                goto done;
        }
 

+#if CONFIG_MACF
+       /* pass in 0 for the offset argument because AMFI does not need the offset
+               of the shared cache */
+       error = mac_file_check_mmap(vfs_context_ucred(vfs_context_current()),
+                       fp->f_fglob, VM_PROT_ALL, MAP_FILE, 0, &maxprot);
+       if (error) {
+               goto done;
+       }
+#endif /* MAC */
+

        /* make sure vnode is on the process's root volume */
        root_vp = p->p_fd->fd_rdir;
        if (root_vp == NULL) {
                root_vp = rootvnode;
        /* make sure vnode is on the process's root volume */
        root_vp = p->p_fd->fd_rdir;
        if (root_vp == NULL) {
                root_vp = rootvnode;

+       } else {
+               /*
+                * Chroot-ed processes can't use the shared_region.
+                */
+               error = EINVAL;
+               goto done;

        }
        }

+

        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",
        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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name));

                error = EPERM;
                goto done;
        }
                error = EPERM;
                goto done;
        }


@@ -953,28 +1694,62 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map(%p:'%s'): "
                         "vnode_getattr(%p) failed (error=%d)\n",
                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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name,
+                        (void *)VM_KERNEL_ADDRPERM(vp), error));

                goto done;
        }
        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",
                goto done;
        }
        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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp),
+                        vp->v_name, va.va_uid));

                error = EPERM;
                goto done;
        }
 
                error = EPERM;
                goto done;
        }
 

+       if (scdir_enforce) {
+               /* get vnode for scdir_path */
+               error = vnode_lookup(scdir_path, 0, &scdir_vp, vfs_context_current());
+               if (error) {
+                       SHARED_REGION_TRACE_ERROR(
+                               ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                                "vnode_lookup(%s) failed (error=%d)\n",
+                                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                                p->p_pid, p->p_comm,
+                                (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name,
+                                scdir_path, error));
+                       goto done;
+               }
+
+               /* ensure parent is scdir_vp */
+               if (vnode_parent(vp) != scdir_vp) {
+                       SHARED_REGION_TRACE_ERROR(
+                               ("shared_region: %p [%d(%s)] map(%p:'%s'): "
+                                "shared cache file not in %s\n",
+                                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                                p->p_pid, p->p_comm,
+                                (void *)VM_KERNEL_ADDRPERM(vp),
+                                vp->v_name, scdir_path));
+                       error = EPERM;
+                       goto done;
+               }
+       }
+

        /* 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",
        /* 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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name,
+                        (void *)VM_KERNEL_ADDRPERM(vp), error));

                goto done;
        }
        file_size = fs;
                goto done;
        }
        file_size = fs;


@@ -985,56 +1760,54 @@ shared_region_map_np(
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map(%p:'%s'): "
                         "no memory object\n",
                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 {
-               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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name));

                error = EINVAL;
                goto done;
        }
 
                error = EINVAL;
                goto done;
        }
 

-       user_mappings = uap->mappings;  /* the mappings, in user space */
-       error = copyin(user_mappings,
-                      mappings,
-                      mappings_size);
-       if (error) {
+       /* check that the mappings are properly covered by code signatures */
+       if (!cs_system_enforcement()) {
+               /* code signing is not enforced: no need to check */
+       } else for (i = 0; i < mappings_count; i++) {
+               if (mappings[i].sfm_init_prot & VM_PROT_ZF) {
+                       /* zero-filled mapping: not backed by the file */
+                       continue;
+               }
+               if (ubc_cs_is_range_codesigned(vp,
+                                              mappings[i].sfm_file_offset,
+                                              mappings[i].sfm_size)) {
+                       /* this mapping is fully covered by code signatures */
+                       continue;
+               }

                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map(%p:'%s'): "
                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));
+                        "mapping #%d/%d [0x%llx:0x%llx:0x%llx:0x%x:0x%x] "
+                        "is not code-signed\n",
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name,
+                        i, mappings_count,
+                        mappings[i].sfm_address,
+                        mappings[i].sfm_size,
+                        mappings[i].sfm_file_offset,
+                        mappings[i].sfm_max_prot,
+                        mappings[i].sfm_init_prot));
+               error = EINVAL;

                goto done;
        }
 
        /* get the process's shared region (setup in vm_map_exec()) */
                goto done;
        }
 
        /* get the process's shared region (setup in vm_map_exec()) */

-       shared_region = vm_shared_region_get(current_task());
+       shared_region = vm_shared_region_trim_and_get(current_task());

        if (shared_region == NULL) {
                SHARED_REGION_TRACE_ERROR(
                        ("shared_region: %p [%d(%s)] map(%p:'%s'): "
                         "no shared region\n",
        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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name));
+               error = EINVAL;

                goto done;
        }
 
                goto done;
        }
 


@@ -1044,13 +1817,17 @@ shared_region_map_np(
                                       mappings,
                                       file_control,
                                       file_size,
                                       mappings,
                                       file_control,
                                       file_size,

-                                      (void *) p->p_fd->fd_rdir);
+                                      (void *) p->p_fd->fd_rdir,
+                                      slide,
+                                      slide_start,
+                                      slide_size);

        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",
        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));
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        (void *)VM_KERNEL_ADDRPERM(vp), vp->v_name, kr));

                switch (kr) {
                case KERN_INVALID_ADDRESS:
                        error = EFAULT;
                switch (kr) {
                case KERN_INVALID_ADDRESS:
                        error = EFAULT;


@@ -1072,6 +1849,12 @@ shared_region_map_np(
 
        error = 0;
 
 
        error = 0;
 

+       vnode_lock_spin(vp);
+
+       vp->v_flag |= VSHARED_DYLD;
+
+       vnode_unlock(vp);
+

        /* update the vnode's access time */
        if (! (vnode_vfsvisflags(vp) & MNT_NOATIME)) {
                VATTR_INIT(&va);
        /* update the vnode's access time */
        if (! (vnode_vfsvisflags(vp) & MNT_NOATIME)) {
                VATTR_INIT(&va);


@@ -1099,6 +1882,10 @@ done:
                fp_drop(p, fd, fp, 0);
                fp = NULL;
        }
                fp_drop(p, fd, fp, 0);
                fp = NULL;
        }

+       if (scdir_vp != NULL) {
+               (void)vnode_put(scdir_vp);
+               scdir_vp = NULL;
+       }

 
        if (shared_region != NULL) {
                vm_shared_region_deallocate(shared_region);
 
        if (shared_region != NULL) {
                vm_shared_region_deallocate(shared_region);


@@ -1106,24 +1893,95 @@ done:
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] <- map\n",
 
        SHARED_REGION_TRACE_DEBUG(
                ("shared_region: %p [%d(%s)] <- map\n",

-                current_thread(), p->p_pid, p->p_comm));
+                (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                p->p_pid, p->p_comm));

 
        return error;
 }
 
 
        return error;
 }
 

+int
+shared_region_map_and_slide_np(
+       struct proc                             *p,
+       struct shared_region_map_and_slide_np_args      *uap,
+       __unused int                                    *retvalp)
+{
+       struct shared_file_mapping_np   *mappings;
+       unsigned int                    mappings_count = uap->count;
+       kern_return_t                   kr = KERN_SUCCESS;
+       uint32_t                        slide = uap->slide;
+       
+#define SFM_MAX_STACK  8
+       struct shared_file_mapping_np   stack_mappings[SFM_MAX_STACK];
+
+       /* Is the process chrooted?? */
+       if (p->p_fd->fd_rdir != NULL) {
+               kr = EINVAL;
+               goto done;
+       }
+               
+       if ((kr = vm_shared_region_sliding_valid(slide)) != KERN_SUCCESS) {
+               if (kr == KERN_INVALID_ARGUMENT) {
+                       /*
+                        * This will happen if we request sliding again 
+                        * with the same slide value that was used earlier
+                        * for the very first sliding.
+                        */
+                       kr = KERN_SUCCESS;
+               }
+               goto done;
+       }
+
+       if (mappings_count == 0) {
+               SHARED_REGION_TRACE_INFO(
+                       ("shared_region: %p [%d(%s)] map(): "
+                        "no mappings\n",
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm));
+               kr = 0; /* no mappings: we're done ! */
+               goto done;
+       } else if (mappings_count <= SFM_MAX_STACK) {
+               mappings = &stack_mappings[0];
+       } else {
+               SHARED_REGION_TRACE_ERROR(
+                       ("shared_region: %p [%d(%s)] map(): "
+                        "too many mappings (%d)\n",
+                        (void *)VM_KERNEL_ADDRPERM(current_thread()),
+                        p->p_pid, p->p_comm,
+                        mappings_count));
+               kr = KERN_FAILURE;
+               goto done;
+       }
+
+       if ( (kr = shared_region_copyin_mappings(p, uap->mappings, uap->count, mappings))) {
+               goto done;
+       }
+
+
+       kr = _shared_region_map_and_slide(p, uap->fd, mappings_count, mappings,
+                                         slide,
+                                         uap->slide_start, uap->slide_size);
+       if (kr != KERN_SUCCESS) {
+               return kr;
+       }
+
+done:
+       return kr;
+}

 
 /* sysctl overflow room */
 
 
 /* sysctl overflow room */
 

+SYSCTL_INT (_vm, OID_AUTO, pagesize, CTLFLAG_RD | CTLFLAG_LOCKED,
+           (int *) &page_size, 0, "vm page size");
+

 /* 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;
 /* 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, 
+SYSCTL_INT(_vm, OID_AUTO, vm_page_free_target, CTLFLAG_RD | CTLFLAG_LOCKED, 

                   &vm_page_free_target, 0, "Pageout daemon free target");
 
                   &vm_page_free_target, 0, "Pageout daemon free target");
 

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

 
 static int
 vm_ctl_page_free_wanted SYSCTL_HANDLER_ARGS
 
 static int
 vm_ctl_page_free_wanted SYSCTL_HANDLER_ARGS


@@ -1139,38 +1997,190 @@ SYSCTL_PROC(_vm, OID_AUTO, page_free_wanted,
            0, 0, vm_ctl_page_free_wanted, "I", "");
 
 extern unsigned int    vm_page_purgeable_count;
            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,
+SYSCTL_INT(_vm, OID_AUTO, page_purgeable_count, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_purgeable_count, 0, "Purgeable page count");
 
 extern unsigned int    vm_page_purgeable_wired_count;
           &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,
+SYSCTL_INT(_vm, OID_AUTO, page_purgeable_wired_count, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_purgeable_wired_count, 0, "Wired purgeable page count");
 
           &vm_page_purgeable_wired_count, 0, "Wired purgeable page count");
 

-SYSCTL_INT(_vm, OID_AUTO, page_reusable_count, CTLFLAG_RD,
+#if DEVELOPMENT || DEBUG
+extern uint64_t get_pages_grabbed_count(void);
+
+static int
+pages_grabbed SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+       uint64_t value = get_pages_grabbed_count();
+       return SYSCTL_OUT(req, &value, sizeof(value));
+}
+
+SYSCTL_PROC(_vm, OID_AUTO, pages_grabbed, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
+           0, 0, &pages_grabbed, "QU", "Total pages grabbed");
+SYSCTL_ULONG(_vm, OID_AUTO, pages_freed, CTLFLAG_RD | CTLFLAG_LOCKED,
+            &vm_pageout_vminfo.vm_page_pages_freed, "Total pages freed");
+
+SYSCTL_INT(_vm, OID_AUTO, pageout_purged_objects, CTLFLAG_RD | CTLFLAG_LOCKED,
+          &vm_pageout_debug.vm_pageout_purged_objects, 0, "System purged object count");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_busy, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_busy, 0, "Cleaned pages busy (deactivated)");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_nolock, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_nolock, 0, "Cleaned pages no-lock (deactivated)");
+
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_volatile_reactivated, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_volatile_reactivated, 0, "Cleaned pages volatile reactivated");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_fault_reactivated, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_fault_reactivated, 0, "Cleaned pages fault reactivated");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_reactivated, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_reactivated, 0, "Cleaned pages reactivated"); /* sum of all reactivated AND busy and nolock (even though those actually get reDEactivated */
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_cleaned, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_vminfo.vm_pageout_freed_cleaned, "Cleaned pages freed");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_cleaned_reference_reactivated, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_cleaned_reference_reactivated, 0, "Cleaned pages reference reactivated");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_enqueued_cleaned, CTLFLAG_RD | CTLFLAG_LOCKED,
+           &vm_pageout_debug.vm_pageout_enqueued_cleaned, 0, ""); /* sum of next two */
+#endif
+
+extern int madvise_free_debug;
+SYSCTL_INT(_vm, OID_AUTO, madvise_free_debug, CTLFLAG_RW | CTLFLAG_LOCKED,
+          &madvise_free_debug, 0, "zero-fill on madvise(MADV_FREE*)");
+
+SYSCTL_INT(_vm, OID_AUTO, page_reusable_count, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reusable_count, 0, "Reusable page count");
           &vm_page_stats_reusable.reusable_count, 0, "Reusable page count");

-SYSCTL_QUAD(_vm, OID_AUTO, reusable_success, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_success, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reusable_pages_success, "");
           &vm_page_stats_reusable.reusable_pages_success, "");

-SYSCTL_QUAD(_vm, OID_AUTO, reusable_failure, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_failure, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reusable_pages_failure, "");
           &vm_page_stats_reusable.reusable_pages_failure, "");

-SYSCTL_QUAD(_vm, OID_AUTO, reusable_shared, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_pages_shared, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reusable_pages_shared, "");
           &vm_page_stats_reusable.reusable_pages_shared, "");

-SYSCTL_QUAD(_vm, OID_AUTO, all_reusable_calls, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, all_reusable_calls, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.all_reusable_calls, "");
           &vm_page_stats_reusable.all_reusable_calls, "");

-SYSCTL_QUAD(_vm, OID_AUTO, partial_reusable_calls, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, partial_reusable_calls, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.partial_reusable_calls, "");
           &vm_page_stats_reusable.partial_reusable_calls, "");

-SYSCTL_QUAD(_vm, OID_AUTO, reuse_success, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, reuse_success, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reuse_pages_success, "");
           &vm_page_stats_reusable.reuse_pages_success, "");

-SYSCTL_QUAD(_vm, OID_AUTO, reuse_failure, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, reuse_failure, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.reuse_pages_failure, "");
           &vm_page_stats_reusable.reuse_pages_failure, "");

-SYSCTL_QUAD(_vm, OID_AUTO, all_reuse_calls, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, all_reuse_calls, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.all_reuse_calls, "");
           &vm_page_stats_reusable.all_reuse_calls, "");

-SYSCTL_QUAD(_vm, OID_AUTO, partial_reuse_calls, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, partial_reuse_calls, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.partial_reuse_calls, "");
           &vm_page_stats_reusable.partial_reuse_calls, "");

-SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_success, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_success, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.can_reuse_success, "");
           &vm_page_stats_reusable.can_reuse_success, "");

-SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_failure, CTLFLAG_RD,
+SYSCTL_QUAD(_vm, OID_AUTO, can_reuse_failure, CTLFLAG_RD | CTLFLAG_LOCKED,

           &vm_page_stats_reusable.can_reuse_failure, "");
           &vm_page_stats_reusable.can_reuse_failure, "");

+SYSCTL_QUAD(_vm, OID_AUTO, reusable_reclaimed, CTLFLAG_RD | CTLFLAG_LOCKED,
+          &vm_page_stats_reusable.reusable_reclaimed, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_nonwritable, CTLFLAG_RD | CTLFLAG_LOCKED,
+          &vm_page_stats_reusable.reusable_nonwritable, "");
+SYSCTL_QUAD(_vm, OID_AUTO, reusable_shared, CTLFLAG_RD | CTLFLAG_LOCKED,
+          &vm_page_stats_reusable.reusable_shared, "");
+SYSCTL_QUAD(_vm, OID_AUTO, free_shared, CTLFLAG_RD | CTLFLAG_LOCKED,
+          &vm_page_stats_reusable.free_shared, "");
+
+
+extern unsigned int vm_page_free_count, vm_page_speculative_count;
+SYSCTL_UINT(_vm, OID_AUTO, page_free_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_free_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_speculative_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_speculative_count, 0, "");
+
+extern unsigned int vm_page_cleaned_count;
+SYSCTL_UINT(_vm, OID_AUTO, page_cleaned_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_cleaned_count, 0, "Cleaned queue size");
+
+extern unsigned int vm_page_pageable_internal_count, vm_page_pageable_external_count;
+SYSCTL_UINT(_vm, OID_AUTO, page_pageable_internal_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_pageable_internal_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_pageable_external_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_pageable_external_count, 0, "");
+
+/* pageout counts */
+SYSCTL_UINT(_vm, OID_AUTO, pageout_inactive_clean, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_state.vm_pageout_inactive_clean, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, pageout_inactive_used, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_state.vm_pageout_inactive_used, 0, "");
+
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_inactive_dirty_internal, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_inactive_dirty_internal, "");
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_inactive_dirty_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_inactive_dirty_external, "");
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_speculative_clean, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_freed_speculative, "");
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_freed_external, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_freed_external, "");
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_freed_speculative, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_freed_speculative, "");
+SYSCTL_ULONG(_vm, OID_AUTO, pageout_freed_cleaned, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_pageout_vminfo.vm_pageout_freed_cleaned, "");
+
+
+/* counts of pages prefaulted when entering a memory object */
+extern int64_t vm_prefault_nb_pages, vm_prefault_nb_bailout;
+SYSCTL_QUAD(_vm, OID_AUTO, prefault_nb_pages, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_prefault_nb_pages, "");
+SYSCTL_QUAD(_vm, OID_AUTO, prefault_nb_bailout, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_prefault_nb_bailout, "");
+
+#if defined (__x86_64__)
+extern unsigned int vm_clump_promote_threshold;
+SYSCTL_UINT(_vm, OID_AUTO, vm_clump_promote_threshold, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_clump_promote_threshold, 0, "clump size threshold for promotes");
+#if DEVELOPMENT || DEBUG
+extern unsigned long vm_clump_stats[];
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats1, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[1], "free page allocations from clump of 1 page");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats2, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[2], "free page allocations from clump of 2 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats3, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[3], "free page allocations from clump of 3 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats4, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[4], "free page allocations from clump of 4 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats5, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[5], "free page allocations from clump of 5 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats6, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[6], "free page allocations from clump of 6 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats7, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[7], "free page allocations from clump of 7 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats8, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[8], "free page allocations from clump of 8 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats9, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[9], "free page allocations from clump of 9 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats10, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[10], "free page allocations from clump of 10 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats11, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[11], "free page allocations from clump of 11 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats12, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[12], "free page allocations from clump of 12 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats13, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[13], "free page allocations from clump of 13 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats14, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[14], "free page allocations from clump of 14 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats15, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[15], "free page allocations from clump of 15 pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_stats16, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_stats[16], "free page allocations from clump of 16 pages");
+extern unsigned long vm_clump_allocs, vm_clump_inserts, vm_clump_inrange, vm_clump_promotes;
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_alloc, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_allocs, "free page allocations");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_inserts, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_inserts, "free page insertions");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_inrange, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_inrange, "free page insertions that are part of vm_pages");
+SYSCTL_LONG(_vm, OID_AUTO, vm_clump_promotes, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_clump_promotes, "pages promoted to head");
+#endif  /* if DEVELOPMENT || DEBUG */
+#endif  /* #if defined (__x86_64__) */
+
+#if CONFIG_SECLUDED_MEMORY
+
+SYSCTL_UINT(_vm, OID_AUTO, num_tasks_can_use_secluded_mem, CTLFLAG_RD | CTLFLAG_LOCKED, &num_tasks_can_use_secluded_mem, 0, "");
+extern unsigned int vm_page_secluded_target;
+extern unsigned int vm_page_secluded_count;
+extern unsigned int vm_page_secluded_count_free;
+extern unsigned int vm_page_secluded_count_inuse;
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_target, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded_target, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_count, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded_count, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_count_free, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded_count_free, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_count_inuse, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded_count_inuse, 0, "");
+
+extern struct vm_page_secluded_data vm_page_secluded;
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_eligible, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.eligible_for_secluded, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_success_free, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_success_free, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_success_other, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_success_other, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_failure_locked, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_failure_locked, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_failure_state, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_failure_state, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_failure_dirty, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_failure_dirty, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_for_iokit, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_for_iokit, 0, "");
+SYSCTL_UINT(_vm, OID_AUTO, page_secluded_grab_for_iokit_success, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_secluded.grab_for_iokit_success, 0, "");
+
+#endif /* CONFIG_SECLUDED_MEMORY */
+
+#include <kern/thread.h>
+#include <sys/user.h>

 
 

+void vm_pageout_io_throttle(void);
+
+void vm_pageout_io_throttle(void) {
+       struct uthread *uthread = get_bsdthread_info(current_thread());
+ 
+               /*
+                * thread is marked as a low priority I/O type
+                * and the I/O we issued while in this cleaning operation
+                * collided with normal I/O operations... we'll
+                * delay in order to mitigate the impact of this
+                * task on the normal operation of the system
+                */
+
+       if (uthread->uu_lowpri_window) {
+               throttle_lowpri_io(1);
+       }
+
+}

 
 int
 vm_pressure_monitor(
 
 int
 vm_pressure_monitor(


@@ -1208,3 +2218,179 @@ vm_pressure_monitor(
        *retval = (int) pages_wanted;
        return 0;
 }
        *retval = (int) pages_wanted;
        return 0;
 }

+
+int
+kas_info(struct proc *p,
+                         struct kas_info_args *uap,
+                         int *retval __unused)
+{
+#ifdef SECURE_KERNEL
+       (void)p;
+       (void)uap;
+       return ENOTSUP;
+#else /* !SECURE_KERNEL */
+       int                     selector = uap->selector;
+       user_addr_t     valuep = uap->value;
+       user_addr_t     sizep = uap->size;
+       user_size_t size;
+       int                     error;
+
+       if (!kauth_cred_issuser(kauth_cred_get())) {
+               return EPERM;
+       }
+
+#if CONFIG_MACF
+       error = mac_system_check_kas_info(kauth_cred_get(), selector);
+       if (error) {
+               return error;
+       }
+#endif
+
+       if (IS_64BIT_PROCESS(p)) {
+               user64_size_t size64;
+               error = copyin(sizep, &size64, sizeof(size64));
+               size = (user_size_t)size64;
+       } else {
+               user32_size_t size32;
+               error = copyin(sizep, &size32, sizeof(size32));
+               size = (user_size_t)size32;
+       }
+       if (error) {
+               return error;
+       }
+
+       switch (selector) {
+               case KAS_INFO_KERNEL_TEXT_SLIDE_SELECTOR:
+                       {
+                               uint64_t slide = vm_kernel_slide;
+
+                               if (sizeof(slide) != size) {
+                                       return EINVAL;
+                               }
+                               
+                               if (IS_64BIT_PROCESS(p)) {
+                                       user64_size_t size64 = (user64_size_t)size;
+                                       error = copyout(&size64, sizep, sizeof(size64));
+                               } else {
+                                       user32_size_t size32 = (user32_size_t)size;
+                                       error = copyout(&size32, sizep, sizeof(size32));
+                               }
+                               if (error) {
+                                       return error;
+                               }
+                               
+                               error = copyout(&slide, valuep, sizeof(slide));
+                               if (error) {
+                                       return error;
+                               }
+                       }
+                       break;
+               default:
+                       return EINVAL;
+       }
+
+       return 0;
+#endif /* !SECURE_KERNEL */
+}
+
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wcast-qual"
+#pragma clang diagnostic ignored "-Wunused-function"
+
+static void asserts() {
+       static_assert(sizeof(vm_min_kernel_address) == sizeof(unsigned long));
+       static_assert(sizeof(vm_max_kernel_address) == sizeof(unsigned long));
+}
+
+SYSCTL_ULONG(_vm, OID_AUTO, vm_min_kernel_address, CTLFLAG_RD, (unsigned long *) &vm_min_kernel_address, "");
+SYSCTL_ULONG(_vm, OID_AUTO, vm_max_kernel_address, CTLFLAG_RD, (unsigned long *) &vm_max_kernel_address, "");
+#pragma clang diagnostic pop
+
+extern uint32_t vm_page_pages;
+SYSCTL_UINT(_vm, OID_AUTO, pages, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_pages, 0, "");
+
+extern uint32_t vm_page_busy_absent_skipped;
+SYSCTL_UINT(_vm, OID_AUTO, page_busy_absent_skipped, CTLFLAG_RD | CTLFLAG_LOCKED, &vm_page_busy_absent_skipped, 0, "");
+
+#if (__arm__ || __arm64__) && (DEVELOPMENT || DEBUG)
+extern int vm_footprint_suspend_allowed;
+SYSCTL_INT(_vm, OID_AUTO, footprint_suspend_allowed, CTLFLAG_RW | CTLFLAG_LOCKED, &vm_footprint_suspend_allowed, 0, "");
+
+extern void pmap_footprint_suspend(vm_map_t map, boolean_t suspend);
+static int
+sysctl_vm_footprint_suspend SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+       int error = 0;
+       int new_value;
+
+       if (req->newptr == USER_ADDR_NULL) {
+               return 0;
+       }
+       error = SYSCTL_IN(req, &new_value, sizeof(int));
+       if (error) {
+               return error;
+       }
+       if (!vm_footprint_suspend_allowed) {
+               if (new_value != 0) {
+                       /* suspends are not allowed... */
+                       return 0;
+               }
+               /* ... but let resumes proceed */
+       }
+       DTRACE_VM2(footprint_suspend,
+                  vm_map_t, current_map(),
+                  int, new_value);
+
+       pmap_footprint_suspend(current_map(), new_value);
+
+       return 0;
+}
+SYSCTL_PROC(_vm, OID_AUTO, footprint_suspend,
+           CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_ANYBODY|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+           0, 0, &sysctl_vm_footprint_suspend, "I", "");
+#endif /* (__arm__ || __arm64__) && (DEVELOPMENT || DEBUG) */
+
+extern uint64_t vm_map_corpse_footprint_count;
+extern uint64_t vm_map_corpse_footprint_size_avg;
+extern uint64_t vm_map_corpse_footprint_size_max;
+extern uint64_t vm_map_corpse_footprint_full;
+extern uint64_t vm_map_corpse_footprint_no_buf;
+SYSCTL_QUAD(_vm, OID_AUTO, corpse_footprint_count,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_corpse_footprint_count, "");
+SYSCTL_QUAD(_vm, OID_AUTO, corpse_footprint_size_avg,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_corpse_footprint_size_avg, "");
+SYSCTL_QUAD(_vm, OID_AUTO, corpse_footprint_size_max,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_corpse_footprint_size_max, "");
+SYSCTL_QUAD(_vm, OID_AUTO, corpse_footprint_full,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_corpse_footprint_full, "");
+SYSCTL_QUAD(_vm, OID_AUTO, corpse_footprint_no_buf,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_map_corpse_footprint_no_buf, "");
+
+#if PMAP_CS
+extern uint64_t vm_cs_defer_to_pmap_cs;
+extern uint64_t vm_cs_defer_to_pmap_cs_not;
+SYSCTL_QUAD(_vm, OID_AUTO, cs_defer_to_pmap_cs,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_cs_defer_to_pmap_cs, "");
+SYSCTL_QUAD(_vm, OID_AUTO, cs_defer_to_pmap_cs_not,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &vm_cs_defer_to_pmap_cs_not, "");
+#endif /* PMAP_CS */
+
+extern uint64_t shared_region_pager_copied;
+extern uint64_t shared_region_pager_slid;
+extern uint64_t shared_region_pager_slid_error;
+extern uint64_t shared_region_pager_reclaimed;
+SYSCTL_QUAD(_vm, OID_AUTO, shared_region_pager_copied,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &shared_region_pager_copied, "");
+SYSCTL_QUAD(_vm, OID_AUTO, shared_region_pager_slid,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &shared_region_pager_slid, "");
+SYSCTL_QUAD(_vm, OID_AUTO, shared_region_pager_slid_error,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &shared_region_pager_slid_error, "");
+SYSCTL_QUAD(_vm, OID_AUTO, shared_region_pager_reclaimed,
+           CTLFLAG_RD | CTLFLAG_LOCKED, &shared_region_pager_reclaimed, "");
+
+#if MACH_ASSERT
+extern int pmap_ledgers_panic_leeway;
+SYSCTL_INT(_vm, OID_AUTO, pmap_ledgers_panic_leeway, CTLFLAG_RW | CTLFLAG_LOCKED, &pmap_ledgers_panic_leeway, 0, "");
+#endif /* MACH_ASSERT */