int
fill_procregioninfo(task_t task, uint64_t arg, struct proc_regioninfo_internal *pinfo, uint32_t *vnodeaddr, uint32_t *vid)
{
vm_map_t map;
vm_map_offset_t address = (vm_map_offset_t )arg;
vm_map_entry_t tmp_entry;
vm_map_entry_t entry;
vm_map_offset_t start;
vm_region_extended_info_data_t extended;
vm_region_top_info_data_t top;
task_lock(task);
map = task->map;
if (map == VM_MAP_NULL)
{
task_unlock(task);
return(0);
}
vm_map_reference(map);
task_unlock(task);
vm_map_lock_read(map);
start = address;
if (!vm_map_lookup_entry(map, start, &tmp_entry)) {
if ((entry = tmp_entry->vme_next) == vm_map_to_entry(map)) {
vm_map_unlock_read(map);
vm_map_deallocate(map);
return(0);
}
} else {
entry = tmp_entry;
}
start = entry->vme_start;
pinfo->pri_offset = entry->offset;
pinfo->pri_protection = entry->protection;
pinfo->pri_max_protection = entry->max_protection;
pinfo->pri_inheritance = entry->inheritance;
pinfo->pri_behavior = entry->behavior;
pinfo->pri_user_wired_count = entry->user_wired_count;
pinfo->pri_user_tag = entry->alias;
if (entry->is_sub_map) {
pinfo->pri_flags |= PROC_REGION_SUBMAP;
} else {
if (entry->is_shared)
pinfo->pri_flags |= PROC_REGION_SHARED;
}
extended.protection = entry->protection;
extended.user_tag = entry->alias;
extended.pages_resident = 0;
extended.pages_swapped_out = 0;
extended.pages_shared_now_private = 0;
extended.pages_dirtied = 0;
extended.external_pager = 0;
extended.shadow_depth = 0;
vm_map_region_walk(map, start, entry, entry->offset, entry->vme_end - start, &extended);
if (extended.external_pager && extended.ref_count == 2 && extended.share_mode == SM_SHARED)
extended.share_mode = SM_PRIVATE;
top.private_pages_resident = 0;
top.shared_pages_resident = 0;
vm_map_region_top_walk(entry, &top);
pinfo->pri_pages_resident = extended.pages_resident;
pinfo->pri_pages_shared_now_private = extended.pages_shared_now_private;
pinfo->pri_pages_swapped_out = extended.pages_swapped_out;
pinfo->pri_pages_dirtied = extended.pages_dirtied;
pinfo->pri_ref_count = extended.ref_count;
pinfo->pri_shadow_depth = extended.shadow_depth;
pinfo->pri_share_mode = extended.share_mode;
pinfo->pri_private_pages_resident = top.private_pages_resident;
pinfo->pri_shared_pages_resident = top.shared_pages_resident;
pinfo->pri_obj_id = top.obj_id;
pinfo->pri_address = (uint64_t)start;
pinfo->pri_size = (uint64_t)(entry->vme_end - start);
pinfo->pri_depth = 0;
if ((vnodeaddr != 0) && (entry->is_sub_map == 0)) {
*vnodeaddr = (uint32_t)0;
if (fill_vnodeinfoforaddr(entry, vnodeaddr, vid) ==0) {
vm_map_unlock_read(map);
vm_map_deallocate(map);
return(1);
}
}
vm_map_unlock_read(map);
vm_map_deallocate(map);
return(1);
}
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment,
task_t inTask)
{
vm_map_t map = 0;
IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
if (!capacity)
return false;
_options = options;
_capacity = capacity;
_physAddrs = 0;
_physSegCount = 0;
_buffer = 0;
// Grab the direction and the Auto Prepare bits from the Buffer MD options
iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare);
if ((options & kIOMemorySharingTypeMask) && (alignment < page_size))
alignment = page_size;
if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
return false;
_alignment = alignment;
if (options & kIOMemoryPageable)
{
iomdOptions |= kIOMemoryBufferPageable;
if (inTask == kernel_task)
{
/* Allocate some kernel address space. */
_buffer = IOMallocPageable(capacity, alignment);
if (_buffer)
map = IOPageableMapForAddress((vm_address_t) _buffer);
}
else
{
kern_return_t kr;
if( !reserved) {
reserved = IONew( ExpansionData, 1 );
if( !reserved)
return( false );
}
map = get_task_map(inTask);
vm_map_reference(map);
reserved->map = map;
kr = vm_allocate( map, (vm_address_t *) &_buffer, round_page_32(capacity),
VM_FLAGS_ANYWHERE | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
if( KERN_SUCCESS != kr)
return( false );
// we have to make sure that these pages don't get copied on fork.
kr = vm_inherit( map, (vm_address_t) _buffer, round_page_32(capacity), VM_INHERIT_NONE);
if( KERN_SUCCESS != kr)
return( false );
}
}
else
{
// @@@ gvdl: Need to remove this
// Buffer should never auto prepare they should be prepared explicitly
// But it never was enforced so what are you going to do?
iomdOptions |= kIOMemoryAutoPrepare;
/* Allocate a wired-down buffer inside kernel space. */
if (options & kIOMemoryPhysicallyContiguous)
_buffer = IOMallocContiguous(capacity, alignment, 0);
else if (alignment > 1)
_buffer = IOMallocAligned(capacity, alignment);
else
_buffer = IOMalloc(capacity);
}
if (!_buffer)
return false;
_singleRange.v.address = (vm_address_t) _buffer;
_singleRange.v.length = capacity;
if (!super::initWithOptions(&_singleRange.v, 1, 0,
inTask, iomdOptions, /* System mapper */ 0))
return false;
if (options & kIOMemoryPageable) {
kern_return_t kr;
ipc_port_t sharedMem = (ipc_port_t) _memEntry;
vm_size_t size = round_page_32(_ranges.v[0].length);
// must create the entry before any pages are allocated
if( 0 == sharedMem) {
// set memory entry cache
vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
switch (options & kIOMapCacheMask)
{
case kIOMapInhibitCache:
SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
break;
case kIOMapWriteThruCache:
SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
break;
case kIOMapWriteCombineCache:
SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
break;
case kIOMapCopybackCache:
SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
break;
case kIOMapDefaultCache:
default:
SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
break;
}
kr = mach_make_memory_entry( map,
&size, _ranges.v[0].address,
memEntryCacheMode, &sharedMem,
NULL );
if( (KERN_SUCCESS == kr) && (size != round_page_32(_ranges.v[0].length))) {
ipc_port_release_send( sharedMem );
kr = kIOReturnVMError;
}
if( KERN_SUCCESS != kr)
sharedMem = 0;
_memEntry = (void *) sharedMem;
}
}
setLength(capacity);
return true;
}
