#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
+#include <vm/vm_compressor.h>
#include <vm/vm_pageout.h>
#include <kern/misc_protos.h>
#include <vm/cpm.h>
#include <string.h>
#include <libkern/OSDebug.h>
+#include <libkern/crypto/sha2.h>
#include <sys/kdebug.h>
+#include <san/kasan.h>
+
/*
* Variables exported by this module.
*/
* Forward declarations for internal functions.
*/
extern kern_return_t kmem_alloc_pages(
- register vm_object_t object,
- register vm_object_offset_t offset,
- register vm_object_size_t size);
-
-extern void kmem_remap_pages(
- register vm_object_t object,
- register vm_object_offset_t offset,
- register vm_offset_t start,
- register vm_offset_t end,
- vm_prot_t protection);
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_object_size_t size);
kern_return_t
kmem_alloc_contig(
vm_offset_t mask,
ppnum_t max_pnum,
ppnum_t pnum_mask,
- int flags)
+ int flags,
+ vm_tag_t tag)
{
vm_object_t object;
vm_object_offset_t offset;
vm_page_t m, pages;
kern_return_t kr;
+ assert(VM_KERN_MEMORY_NONE != tag);
+
if (map == VM_MAP_NULL || (flags & ~(KMA_KOBJECT | KMA_LOMEM | KMA_NOPAGEWAIT)))
return KERN_INVALID_ARGUMENT;
object = vm_object_allocate(map_size);
}
- kr = vm_map_find_space(map, &map_addr, map_size, map_mask, 0, &entry);
+ kr = vm_map_find_space(map, &map_addr, map_size, map_mask, 0,
+ VM_MAP_KERNEL_FLAGS_NONE, tag, &entry);
if (KERN_SUCCESS != kr) {
vm_object_deallocate(object);
return kr;
}
- entry->object.vm_object = object;
- entry->offset = offset = (object == kernel_object) ?
- map_addr : 0;
+ if (object == kernel_object) {
+ offset = map_addr;
+ } else {
+ offset = 0;
+ }
+ VME_OBJECT_SET(entry, object);
+ VME_OFFSET_SET(entry, offset);
/* Take an extra object ref in case the map entry gets deleted */
vm_object_reference(object);
}
vm_object_unlock(object);
- kr = vm_map_wire(map,
+ kr = vm_map_wire_kernel(map,
vm_map_trunc_page(map_addr,
VM_MAP_PAGE_MASK(map)),
vm_map_round_page(map_addr + map_size,
VM_MAP_PAGE_MASK(map)),
- VM_PROT_DEFAULT,
+ VM_PROT_DEFAULT, tag,
FALSE);
+
if (kr != KERN_SUCCESS) {
if (object == kernel_object) {
vm_object_lock(object);
}
vm_object_deallocate(object);
- if (object == kernel_object)
+ if (object == kernel_object) {
vm_map_simplify(map, map_addr);
-
+ vm_tag_update_size(tag, map_size);
+ }
*addrp = (vm_offset_t) map_addr;
assert((vm_map_offset_t) *addrp == map_addr);
+
return KERN_SUCCESS;
}
kern_return_t
kernel_memory_allocate(
- register vm_map_t map,
- register vm_offset_t *addrp,
- register vm_size_t size,
- register vm_offset_t mask,
- int flags)
+ vm_map_t map,
+ vm_offset_t *addrp,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ vm_tag_t tag)
{
vm_object_t object;
vm_object_offset_t offset;
int wired_page_count = 0;
int i;
int vm_alloc_flags;
+ vm_map_kernel_flags_t vmk_flags;
vm_prot_t kma_prot;
if (! vm_kernel_ready) {
map_size = vm_map_round_page(size,
VM_MAP_PAGE_MASK(map));
map_mask = (vm_map_offset_t) mask;
- vm_alloc_flags = 0;
+
+ vm_alloc_flags = 0; //VM_MAKE_TAG(tag);
+ vmk_flags = VM_MAP_KERNEL_FLAGS_NONE;
/* Check for zero allocation size (either directly or via overflow) */
if (map_size == 0) {
* limit the size of a single extent of wired memory
* to try and limit the damage to the system if
* too many pages get wired down
- * limit raised to 2GB with 128GB max physical limit
+ * limit raised to 2GB with 128GB max physical limit,
+ * but scaled by installed memory above this
*/
- if (map_size > (1ULL << 31)) {
+ if ( !(flags & KMA_VAONLY) && map_size > MAX(1ULL<<31, sane_size/64)) {
return KERN_RESOURCE_SHORTAGE;
}
fill_size = map_size;
if (flags & KMA_GUARD_FIRST) {
- vm_alloc_flags |= VM_FLAGS_GUARD_BEFORE;
+ vmk_flags.vmkf_guard_before = TRUE;
fill_start += PAGE_SIZE_64;
fill_size -= PAGE_SIZE_64;
if (map_size < fill_start + fill_size) {
guard_page_count++;
}
if (flags & KMA_GUARD_LAST) {
- vm_alloc_flags |= VM_FLAGS_GUARD_AFTER;
+ vmk_flags.vmkf_guard_after = TRUE;
fill_size -= PAGE_SIZE_64;
if (map_size <= fill_start + fill_size) {
/* no space for a guard page */
}
vm_page_more_fictitious();
}
- mem->pageq.next = (queue_entry_t)guard_page_list;
+ mem->snext = guard_page_list;
guard_page_list = mem;
}
}
VM_PAGE_WAIT();
}
- mem->pageq.next = (queue_entry_t)wired_page_list;
+ if (KMA_ZERO & flags) vm_page_zero_fill(mem);
+ mem->snext = wired_page_list;
wired_page_list = mem;
}
}
object = vm_object_allocate(map_size);
}
+ if (flags & KMA_ATOMIC)
+ vmk_flags.vmkf_atomic_entry = TRUE;
+
kr = vm_map_find_space(map, &map_addr,
fill_size, map_mask,
- vm_alloc_flags, &entry);
+ vm_alloc_flags, vmk_flags, tag, &entry);
if (KERN_SUCCESS != kr) {
vm_object_deallocate(object);
goto out;
}
- entry->object.vm_object = object;
- entry->offset = offset = (object == kernel_object || object == compressor_object) ?
- map_addr : 0;
+ if (object == kernel_object || object == compressor_object) {
+ offset = map_addr;
+ } else {
+ offset = 0;
+ }
+ VME_OBJECT_SET(entry, object);
+ VME_OFFSET_SET(entry, offset);
if (object != compressor_object)
entry->wired_count++;
panic("kernel_memory_allocate: guard_page_list == NULL");
mem = guard_page_list;
- guard_page_list = (vm_page_t)mem->pageq.next;
- mem->pageq.next = NULL;
+ guard_page_list = mem->snext;
+ mem->snext = NULL;
vm_page_insert(mem, object, offset + pg_offset);
kma_prot = VM_PROT_READ | VM_PROT_WRITE;
+#if KASAN
+ if (!(flags & KMA_VAONLY)) {
+ /* for VAONLY mappings we notify in populate only */
+ kasan_notify_address(map_addr, size);
+ }
+#endif
+
if (flags & KMA_VAONLY) {
pg_offset = fill_start + fill_size;
} else {
panic("kernel_memory_allocate: wired_page_list == NULL");
mem = wired_page_list;
- wired_page_list = (vm_page_t)mem->pageq.next;
- mem->pageq.next = NULL;
+ wired_page_list = mem->snext;
+ mem->snext = NULL;
+
+ assert(mem->wire_count == 0);
+ assert(mem->vm_page_q_state == VM_PAGE_NOT_ON_Q);
+
+ mem->vm_page_q_state = VM_PAGE_IS_WIRED;
mem->wire_count++;
+ if (__improbable(mem->wire_count == 0)) {
+ panic("kernel_memory_allocate(%p): wire_count overflow",
+ mem);
+ }
- vm_page_insert(mem, object, offset + pg_offset);
+ vm_page_insert_wired(mem, object, offset + pg_offset, tag);
mem->busy = FALSE;
mem->pmapped = TRUE;
vm_object_unlock(object);
PMAP_ENTER(kernel_pmap, map_addr + pg_offset, mem,
- kma_prot, VM_PROT_NONE, ((flags & KMA_KSTACK) ? VM_MEM_STACK : 0), TRUE);
+ kma_prot, VM_PROT_NONE, ((flags & KMA_KSTACK) ? VM_MEM_STACK : 0), TRUE,
+ pe_result);
vm_object_lock(object);
}
+
+ assert(pe_result == KERN_SUCCESS);
+
if (flags & KMA_NOENCRYPT) {
bzero(CAST_DOWN(void *, (map_addr + pg_offset)), PAGE_SIZE);
- pmap_set_noencrypt(mem->phys_page);
+ pmap_set_noencrypt(VM_PAGE_GET_PHYS_PAGE(mem));
}
}
+ if (kernel_object == object) vm_tag_update_size(tag, fill_size);
}
if ((fill_start + fill_size) < map_size) {
if (guard_page_list == NULL)
panic("kernel_memory_allocate: guard_page_list == NULL");
mem = guard_page_list;
- guard_page_list = (vm_page_t)mem->pageq.next;
- mem->pageq.next = NULL;
+ guard_page_list = mem->snext;
+ mem->snext = NULL;
vm_page_insert(mem, object, offset + pg_offset);
vm_map_t map,
vm_offset_t addr,
vm_size_t size,
- int flags)
+ int flags,
+ vm_tag_t tag)
{
vm_object_t object;
vm_object_offset_t offset, pg_offset;
if (flags & KMA_COMPRESSOR) {
- for (i = 0; i < page_count; i++) {
+ pg_offset = page_count * PAGE_SIZE_64;
+
+ do {
for (;;) {
mem = vm_page_grab();
VM_PAGE_WAIT();
}
- mem->pageq.next = (queue_entry_t) page_list;
+ if (KMA_ZERO & flags) vm_page_zero_fill(mem);
+ mem->snext = page_list;
page_list = mem;
- }
+
+ pg_offset -= PAGE_SIZE_64;
+
+ kr = pmap_enter_options(kernel_pmap,
+ addr + pg_offset, VM_PAGE_GET_PHYS_PAGE(mem),
+ VM_PROT_READ | VM_PROT_WRITE, VM_PROT_NONE, 0, TRUE,
+ PMAP_OPTIONS_INTERNAL, NULL);
+ assert(kr == KERN_SUCCESS);
+
+ } while (pg_offset);
+
offset = addr;
object = compressor_object;
pg_offset += PAGE_SIZE_64) {
mem = page_list;
- page_list = (vm_page_t) mem->pageq.next;
- mem->pageq.next = NULL;
+ page_list = mem->snext;
+ mem->snext = NULL;
vm_page_insert(mem, object, offset + pg_offset);
assert(mem->busy);
- PMAP_ENTER_OPTIONS(kernel_pmap, addr + pg_offset, mem,
- VM_PROT_READ | VM_PROT_WRITE, VM_PROT_NONE,
- 0, TRUE, PMAP_OPTIONS_NOWAIT, pe_result);
-
- if (pe_result == KERN_RESOURCE_SHORTAGE) {
-
- vm_object_unlock(object);
-
- PMAP_ENTER(kernel_pmap, addr + pg_offset, mem,
- VM_PROT_READ | VM_PROT_WRITE, VM_PROT_NONE, 0, TRUE);
-
- vm_object_lock(object);
- }
mem->busy = FALSE;
mem->pmapped = TRUE;
mem->wpmapped = TRUE;
- mem->compressor = TRUE;
+ mem->vm_page_q_state = VM_PAGE_USED_BY_COMPRESSOR;
}
vm_object_unlock(object);
+#if KASAN
+ if (map == compressor_map) {
+ kasan_notify_address_nopoison(addr, size);
+ } else {
+ kasan_notify_address(addr, size);
+ }
+#endif
return KERN_SUCCESS;
}
}
VM_PAGE_WAIT();
}
- mem->pageq.next = (queue_entry_t) page_list;
+ if (KMA_ZERO & flags) vm_page_zero_fill(mem);
+ mem->snext = page_list;
page_list = mem;
}
if (flags & KMA_KOBJECT) {
panic("kernel_memory_populate: page_list == NULL");
mem = page_list;
- page_list = (vm_page_t) mem->pageq.next;
- mem->pageq.next = NULL;
+ page_list = mem->snext;
+ mem->snext = NULL;
+ assert(mem->vm_page_q_state == VM_PAGE_NOT_ON_Q);
+ mem->vm_page_q_state = VM_PAGE_IS_WIRED;
mem->wire_count++;
+ if (__improbable(mem->wire_count == 0)) {
+ panic("kernel_memory_populate(%p): wire_count overflow",
+ mem);
+ }
- vm_page_insert(mem, object, offset + pg_offset);
+ vm_page_insert_wired(mem, object, offset + pg_offset, tag);
mem->busy = FALSE;
mem->pmapped = TRUE;
PMAP_ENTER(kernel_pmap, addr + pg_offset, mem,
VM_PROT_READ | VM_PROT_WRITE, VM_PROT_NONE,
- ((flags & KMA_KSTACK) ? VM_MEM_STACK : 0), TRUE);
+ ((flags & KMA_KSTACK) ? VM_MEM_STACK : 0), TRUE,
+ pe_result);
vm_object_lock(object);
}
+
+ assert(pe_result == KERN_SUCCESS);
+
if (flags & KMA_NOENCRYPT) {
bzero(CAST_DOWN(void *, (addr + pg_offset)), PAGE_SIZE);
- pmap_set_noencrypt(mem->phys_page);
+ pmap_set_noencrypt(VM_PAGE_GET_PHYS_PAGE(mem));
}
}
vm_page_lock_queues();
vm_page_wire_count += page_count;
vm_page_unlock_queues();
+ if (kernel_object == object) vm_tag_update_size(tag, size);
+
vm_object_unlock(object);
+#if KASAN
+ if (map == compressor_map) {
+ kasan_notify_address_nopoison(addr, size);
+ } else {
+ kasan_notify_address(addr, size);
+ }
+#endif
return KERN_SUCCESS;
out:
} else if (flags & KMA_KOBJECT) {
offset = addr;
object = kernel_object;
-
vm_object_lock(object);
} else {
offset = 0;
mem = vm_page_lookup(object, offset + pg_offset);
assert(mem);
-
- pmap_disconnect(mem->phys_page);
+
+ if (mem->vm_page_q_state != VM_PAGE_USED_BY_COMPRESSOR)
+ pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(mem));
mem->busy = TRUE;
vm_page_remove(mem, TRUE);
assert(mem->busy);
- assert(mem->pageq.next == NULL &&
- mem->pageq.prev == NULL);
- mem->pageq.next = (queue_entry_t)local_freeq;
+ assert(mem->pageq.next == 0 && mem->pageq.prev == 0);
+ assert((mem->vm_page_q_state == VM_PAGE_USED_BY_COMPRESSOR) ||
+ (mem->vm_page_q_state == VM_PAGE_NOT_ON_Q));
+
+ mem->vm_page_q_state = VM_PAGE_NOT_ON_Q;
+ mem->snext = local_freeq;
local_freeq = mem;
}
vm_object_unlock(object);
*/
kern_return_t
-kmem_alloc(
+kmem_alloc_external(
vm_map_t map,
vm_offset_t *addrp,
vm_size_t size)
{
- kern_return_t kr = kernel_memory_allocate(map, addrp, size, 0, 0);
+ return (kmem_alloc(map, addrp, size, vm_tag_bt()));
+}
+
+
+kern_return_t
+kmem_alloc(
+ vm_map_t map,
+ vm_offset_t *addrp,
+ vm_size_t size,
+ vm_tag_t tag)
+{
+ return kmem_alloc_flags(map, addrp, size, tag, 0);
+}
+
+kern_return_t
+kmem_alloc_flags(
+ vm_map_t map,
+ vm_offset_t *addrp,
+ vm_size_t size,
+ vm_tag_t tag,
+ int flags)
+{
+ kern_return_t kr = kernel_memory_allocate(map, addrp, size, 0, flags, tag);
TRACE_MACHLEAKS(KMEM_ALLOC_CODE, KMEM_ALLOC_CODE_2, size, *addrp);
return kr;
}
vm_offset_t oldaddr,
vm_size_t oldsize,
vm_offset_t *newaddrp,
- vm_size_t newsize)
+ vm_size_t newsize,
+ vm_tag_t tag)
{
vm_object_t object;
vm_object_offset_t offset;
oldmapsize = oldmapmax - oldmapmin;
newmapsize = vm_map_round_page(newsize,
VM_MAP_PAGE_MASK(map));
-
+ if (newmapsize < newsize) {
+ /* overflow */
+ *newaddrp = 0;
+ return KERN_INVALID_ARGUMENT;
+ }
/*
* Find the VM object backing the old region.
if (!vm_map_lookup_entry(map, oldmapmin, &oldentry))
panic("kmem_realloc");
- object = oldentry->object.vm_object;
+ object = VME_OBJECT(oldentry);
/*
* Increase the size of the object and
*/
kr = vm_map_find_space(map, &newmapaddr, newmapsize,
- (vm_map_offset_t) 0, 0, &newentry);
+ (vm_map_offset_t) 0, 0,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
+ &newentry);
if (kr != KERN_SUCCESS) {
vm_object_lock(object);
for(offset = oldmapsize;
vm_object_deallocate(object);
return kr;
}
- newentry->object.vm_object = object;
- newentry->offset = 0;
- assert (newentry->wired_count == 0);
+ VME_OBJECT_SET(newentry, object);
+ VME_OFFSET_SET(newentry, 0);
+ assert(newentry->wired_count == 0);
/* add an extra reference in case we have someone doing an */
vm_object_reference(object);
vm_map_unlock(map);
- kr = vm_map_wire(map, newmapaddr, newmapaddr + newmapsize, VM_PROT_DEFAULT, FALSE);
+ kr = vm_map_wire_kernel(map, newmapaddr, newmapaddr + newmapsize,
+ VM_PROT_DEFAULT, tag, FALSE);
if (KERN_SUCCESS != kr) {
vm_map_remove(map, newmapaddr, newmapaddr + newmapsize, 0);
vm_object_lock(object);
}
vm_object_deallocate(object);
+ if (kernel_object == object) vm_tag_update_size(tag, newmapsize);
+
*newaddrp = CAST_DOWN(vm_offset_t, newmapaddr);
return KERN_SUCCESS;
}
*/
kern_return_t
-kmem_alloc_kobject(
+kmem_alloc_kobject_external(
vm_map_t map,
vm_offset_t *addrp,
vm_size_t size)
{
- return kernel_memory_allocate(map, addrp, size, 0, KMA_KOBJECT);
+ return (kmem_alloc_kobject(map, addrp, size, vm_tag_bt()));
+}
+
+kern_return_t
+kmem_alloc_kobject(
+ vm_map_t map,
+ vm_offset_t *addrp,
+ vm_size_t size,
+ vm_tag_t tag)
+{
+ return kernel_memory_allocate(map, addrp, size, 0, KMA_KOBJECT, tag);
}
/*
kmem_alloc_aligned(
vm_map_t map,
vm_offset_t *addrp,
- vm_size_t size)
+ vm_size_t size,
+ vm_tag_t tag)
{
if ((size & (size - 1)) != 0)
panic("kmem_alloc_aligned: size not aligned");
- return kernel_memory_allocate(map, addrp, size, size - 1, KMA_KOBJECT);
+ return kernel_memory_allocate(map, addrp, size, size - 1, KMA_KOBJECT, tag);
}
/*
*/
kern_return_t
-kmem_alloc_pageable(
+kmem_alloc_pageable_external(
vm_map_t map,
vm_offset_t *addrp,
vm_size_t size)
+{
+ return (kmem_alloc_pageable(map, addrp, size, vm_tag_bt()));
+}
+
+kern_return_t
+kmem_alloc_pageable(
+ vm_map_t map,
+ vm_offset_t *addrp,
+ vm_size_t size,
+ vm_tag_t tag)
{
vm_map_offset_t map_addr;
vm_map_size_t map_size;
#endif
map_size = vm_map_round_page(size,
VM_MAP_PAGE_MASK(map));
+ if (map_size < size) {
+ /* overflow */
+ *addrp = 0;
+ return KERN_INVALID_ARGUMENT;
+ }
kr = vm_map_enter(map, &map_addr, map_size,
- (vm_map_offset_t) 0, VM_FLAGS_ANYWHERE,
+ (vm_map_offset_t) 0,
+ VM_FLAGS_ANYWHERE,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
VM_OBJECT_NULL, (vm_object_offset_t) 0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS)
return kr;
+#if KASAN
+ kasan_notify_address(map_addr, map_size);
+#endif
*addrp = CAST_DOWN(vm_offset_t, map_addr);
return KERN_SUCCESS;
}
kern_return_t
kmem_alloc_pages(
- register vm_object_t object,
- register vm_object_offset_t offset,
- register vm_object_size_t size)
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_object_size_t size)
{
vm_object_size_t alloc_size;
alloc_size = vm_object_round_page(size);
vm_object_lock(object);
while (alloc_size) {
- register vm_page_t mem;
+ vm_page_t mem;
/*
return KERN_SUCCESS;
}
-/*
- * Remap wired pages in an object into a new region.
- * The object is assumed to be mapped into the kernel map or
- * a submap.
- */
-void
-kmem_remap_pages(
- register vm_object_t object,
- register vm_object_offset_t offset,
- register vm_offset_t start,
- register vm_offset_t end,
- vm_prot_t protection)
-{
-
- vm_map_offset_t map_start;
- vm_map_offset_t map_end;
-
- /*
- * Mark the pmap region as not pageable.
- */
- map_start = vm_map_trunc_page(start,
- VM_MAP_PAGE_MASK(kernel_map));
- map_end = vm_map_round_page(end,
- VM_MAP_PAGE_MASK(kernel_map));
-
- pmap_pageable(kernel_pmap, map_start, map_end, FALSE);
-
- while (map_start < map_end) {
- register vm_page_t mem;
-
- vm_object_lock(object);
-
- /*
- * Find a page
- */
- if ((mem = vm_page_lookup(object, offset)) == VM_PAGE_NULL)
- panic("kmem_remap_pages");
-
- /*
- * Wire it down (again)
- */
- vm_page_lockspin_queues();
- vm_page_wire(mem);
- vm_page_unlock_queues();
- vm_object_unlock(object);
-
- /*
- * ENCRYPTED SWAP:
- * The page is supposed to be wired now, so it
- * shouldn't be encrypted at this point. It can
- * safely be entered in the page table.
- */
- ASSERT_PAGE_DECRYPTED(mem);
-
- /*
- * Enter it in the kernel pmap. The page isn't busy,
- * but this shouldn't be a problem because it is wired.
- */
-
- mem->pmapped = TRUE;
- mem->wpmapped = TRUE;
-
- PMAP_ENTER(kernel_pmap, map_start, mem, protection, VM_PROT_NONE, 0, TRUE);
-
- map_start += PAGE_SIZE;
- offset += PAGE_SIZE;
- }
-}
-
/*
* kmem_suballoc:
*
vm_size_t size,
boolean_t pageable,
int flags,
+ vm_map_kernel_flags_t vmk_flags,
+ vm_tag_t tag,
vm_map_t *new_map)
{
vm_map_t map;
map_size = vm_map_round_page(size,
VM_MAP_PAGE_MASK(parent));
+ if (map_size < size) {
+ /* overflow */
+ *addr = 0;
+ return KERN_INVALID_ARGUMENT;
+ }
/*
* Need reference on submap object because it is internal
VM_MAP_PAGE_MASK(parent)));
kr = vm_map_enter(parent, &map_addr, map_size,
- (vm_map_offset_t) 0, flags,
+ (vm_map_offset_t) 0, flags, vmk_flags, tag,
vm_submap_object, (vm_object_offset_t) 0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS) {
{
vm_map_offset_t map_start;
vm_map_offset_t map_end;
+ vm_map_kernel_flags_t vmk_flags;
+
+ vmk_flags = VM_MAP_KERNEL_FLAGS_NONE;
+ vmk_flags.vmkf_permanent = TRUE;
+ vmk_flags.vmkf_no_pmap_check = TRUE;
map_start = vm_map_trunc_page(start,
VM_MAP_PAGE_MASK(kernel_map));
map_end = vm_map_round_page(end,
VM_MAP_PAGE_MASK(kernel_map));
+#if defined(__arm__) || defined(__arm64__)
+ kernel_map = vm_map_create(pmap_kernel(),VM_MIN_KERNEL_AND_KEXT_ADDRESS,
+ VM_MAX_KERNEL_ADDRESS, FALSE);
+ /*
+ * Reserve virtual memory allocated up to this time.
+ */
+ {
+ unsigned int region_select = 0;
+ vm_map_offset_t region_start;
+ vm_map_size_t region_size;
+ vm_map_offset_t map_addr;
+ kern_return_t kr;
+
+ while (pmap_virtual_region(region_select, ®ion_start, ®ion_size)) {
+
+ map_addr = region_start;
+ kr = vm_map_enter(kernel_map, &map_addr,
+ vm_map_round_page(region_size,
+ VM_MAP_PAGE_MASK(kernel_map)),
+ (vm_map_offset_t) 0,
+ VM_FLAGS_FIXED,
+ vmk_flags,
+ VM_KERN_MEMORY_NONE,
+ VM_OBJECT_NULL,
+ (vm_object_offset_t) 0, FALSE, VM_PROT_NONE, VM_PROT_NONE,
+ VM_INHERIT_DEFAULT);
+
+ if (kr != KERN_SUCCESS) {
+ panic("kmem_init(0x%llx,0x%llx): vm_map_enter(0x%llx,0x%llx) error 0x%x\n",
+ (uint64_t) start, (uint64_t) end, (uint64_t) region_start,
+ (uint64_t) region_size, kr);
+ }
+
+ region_select++;
+ }
+ }
+#else
kernel_map = vm_map_create(pmap_kernel(),VM_MIN_KERNEL_AND_KEXT_ADDRESS,
map_end, FALSE);
/*
vm_map_offset_t map_addr;
kern_return_t kr;
+ vmk_flags = VM_MAP_KERNEL_FLAGS_NONE;
+ vmk_flags.vmkf_no_pmap_check = TRUE;
+
map_addr = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
kr = vm_map_enter(kernel_map,
- &map_addr,
- (vm_map_size_t)(map_start - VM_MIN_KERNEL_AND_KEXT_ADDRESS),
- (vm_map_offset_t) 0,
- VM_FLAGS_FIXED | VM_FLAGS_NO_PMAP_CHECK,
- VM_OBJECT_NULL,
- (vm_object_offset_t) 0, FALSE,
- VM_PROT_NONE, VM_PROT_NONE,
- VM_INHERIT_DEFAULT);
+ &map_addr,
+ (vm_map_size_t)(map_start - VM_MIN_KERNEL_AND_KEXT_ADDRESS),
+ (vm_map_offset_t) 0,
+ VM_FLAGS_FIXED,
+ vmk_flags,
+ VM_KERN_MEMORY_NONE,
+ VM_OBJECT_NULL,
+ (vm_object_offset_t) 0, FALSE,
+ VM_PROT_NONE, VM_PROT_NONE,
+ VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS) {
panic("kmem_init(0x%llx,0x%llx): vm_map_enter(0x%llx,0x%llx) error 0x%x\n",
kr);
}
}
+#endif
/*
* Set the default global user wire limit which limits the amount of
return KERN_SUCCESS;
}
+/*
+ *
+ * The following two functions are to be used when exposing kernel
+ * addresses to userspace via any of the various debug or info
+ * facilities that exist. These are basically the same as VM_KERNEL_ADDRPERM()
+ * and VM_KERNEL_UNSLIDE_OR_PERM() except they use a different random seed and
+ * are exported to KEXTs.
+ *
+ * NOTE: USE THE MACRO VERSIONS OF THESE FUNCTIONS (in vm_param.h) FROM WITHIN THE KERNEL
+ */
-kern_return_t
-vm_conflict_check(
- vm_map_t map,
- vm_map_offset_t off,
- vm_map_size_t len,
- memory_object_t pager,
- vm_object_offset_t file_off)
+static void
+vm_kernel_addrhash_internal(
+ vm_offset_t addr,
+ vm_offset_t *hash_addr,
+ uint64_t salt)
{
- vm_map_entry_t entry;
- vm_object_t obj;
- vm_object_offset_t obj_off;
- vm_map_t base_map;
- vm_map_offset_t base_offset;
- vm_map_offset_t original_offset;
- kern_return_t kr;
- vm_map_size_t local_len;
+ assert(salt != 0);
- base_map = map;
- base_offset = off;
- original_offset = off;
- kr = KERN_SUCCESS;
- vm_map_lock(map);
- while(vm_map_lookup_entry(map, off, &entry)) {
- local_len = len;
+ if (addr == 0) {
+ *hash_addr = 0;
+ return;
+ }
- if (entry->object.vm_object == VM_OBJECT_NULL) {
- vm_map_unlock(map);
- return KERN_SUCCESS;
- }
- if (entry->is_sub_map) {
- vm_map_t old_map;
-
- old_map = map;
- vm_map_lock(entry->object.sub_map);
- map = entry->object.sub_map;
- off = entry->offset + (off - entry->vme_start);
- vm_map_unlock(old_map);
- continue;
- }
- obj = entry->object.vm_object;
- obj_off = (off - entry->vme_start) + entry->offset;
- while(obj->shadow) {
- obj_off += obj->vo_shadow_offset;
- obj = obj->shadow;
- }
- if((obj->pager_created) && (obj->pager == pager)) {
- if(((obj->paging_offset) + obj_off) == file_off) {
- if(off != base_offset) {
- vm_map_unlock(map);
- return KERN_FAILURE;
- }
- kr = KERN_ALREADY_WAITING;
- } else {
- vm_object_offset_t obj_off_aligned;
- vm_object_offset_t file_off_aligned;
-
- obj_off_aligned = obj_off & ~PAGE_MASK;
- file_off_aligned = file_off & ~PAGE_MASK;
-
- if (file_off_aligned == (obj->paging_offset + obj_off_aligned)) {
- /*
- * the target map and the file offset start in the same page
- * but are not identical...
- */
- vm_map_unlock(map);
- return KERN_FAILURE;
- }
- if ((file_off < (obj->paging_offset + obj_off_aligned)) &&
- ((file_off + len) > (obj->paging_offset + obj_off_aligned))) {
- /*
- * some portion of the tail of the I/O will fall
- * within the encompass of the target map
- */
- vm_map_unlock(map);
- return KERN_FAILURE;
- }
- if ((file_off_aligned > (obj->paging_offset + obj_off)) &&
- (file_off_aligned < (obj->paging_offset + obj_off) + len)) {
- /*
- * the beginning page of the file offset falls within
- * the target map's encompass
- */
- vm_map_unlock(map);
- return KERN_FAILURE;
- }
- }
- } else if(kr != KERN_SUCCESS) {
- vm_map_unlock(map);
- return KERN_FAILURE;
- }
+ if (VM_KERNEL_IS_SLID(addr)) {
+ *hash_addr = VM_KERNEL_UNSLIDE(addr);
+ return;
+ }
- if(len <= ((entry->vme_end - entry->vme_start) -
- (off - entry->vme_start))) {
- vm_map_unlock(map);
- return kr;
- } else {
- len -= (entry->vme_end - entry->vme_start) -
- (off - entry->vme_start);
- }
- base_offset = base_offset + (local_len - len);
- file_off = file_off + (local_len - len);
- off = base_offset;
- if(map != base_map) {
- vm_map_unlock(map);
- vm_map_lock(base_map);
- map = base_map;
- }
+ vm_offset_t sha_digest[SHA256_DIGEST_LENGTH/sizeof(vm_offset_t)];
+ SHA256_CTX sha_ctx;
+
+ SHA256_Init(&sha_ctx);
+ SHA256_Update(&sha_ctx, &salt, sizeof(salt));
+ SHA256_Update(&sha_ctx, &addr, sizeof(addr));
+ SHA256_Final(sha_digest, &sha_ctx);
+
+ *hash_addr = sha_digest[0];
+}
+
+void
+vm_kernel_addrhash_external(
+ vm_offset_t addr,
+ vm_offset_t *hash_addr)
+{
+ return vm_kernel_addrhash_internal(addr, hash_addr, vm_kernel_addrhash_salt_ext);
+}
+
+vm_offset_t
+vm_kernel_addrhash(vm_offset_t addr)
+{
+ vm_offset_t hash_addr;
+ vm_kernel_addrhash_internal(addr, &hash_addr, vm_kernel_addrhash_salt);
+ return hash_addr;
+}
+
+void
+vm_kernel_addrhide(
+ vm_offset_t addr,
+ vm_offset_t *hide_addr)
+{
+ *hide_addr = VM_KERNEL_ADDRHIDE(addr);
+}
+
+/*
+ * vm_kernel_addrperm_external:
+ * vm_kernel_unslide_or_perm_external:
+ *
+ * Use these macros when exposing an address to userspace that could come from
+ * either kernel text/data *or* the heap.
+ */
+void
+vm_kernel_addrperm_external(
+ vm_offset_t addr,
+ vm_offset_t *perm_addr)
+{
+ if (VM_KERNEL_IS_SLID(addr)) {
+ *perm_addr = VM_KERNEL_UNSLIDE(addr);
+ } else if (VM_KERNEL_ADDRESS(addr)) {
+ *perm_addr = addr + vm_kernel_addrperm_ext;
+ } else {
+ *perm_addr = addr;
}
+}
- vm_map_unlock(map);
- return kr;
+void
+vm_kernel_unslide_or_perm_external(
+ vm_offset_t addr,
+ vm_offset_t *up_addr)
+{
+ vm_kernel_addrperm_external(addr, up_addr);
}
projects / apple / xnu.git / blobdiff