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Atmosphere/libraries/libmesosphere/source/kern_k_page_table_base.cpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
#include <mesosphere/kern_select_page_table.hpp>
namespace ams::kern {
Result KPageTableBase::InitializeForKernel(bool is_64_bit, void *table, KVirtualAddress start, KVirtualAddress end) {
/* Initialize our members. */
this->address_space_width = (is_64_bit) ? BITSIZEOF(u64) : BITSIZEOF(u32);
this->address_space_start = KProcessAddress(GetInteger(start));
this->address_space_end = KProcessAddress(GetInteger(end));
this->is_kernel = true;
this->enable_aslr = true;
this->heap_region_start = 0;
this->heap_region_end = 0;
this->current_heap_end = 0;
this->alias_region_start = 0;
this->alias_region_end = 0;
this->stack_region_start = 0;
this->stack_region_end = 0;
this->kernel_map_region_start = 0;
this->kernel_map_region_end = 0;
this->alias_code_region_start = 0;
this->alias_code_region_end = 0;
this->code_region_start = 0;
this->code_region_end = 0;
this->max_heap_size = 0;
this->mapped_physical_memory_size = 0;
this->mapped_unsafe_physical_memory = 0;
this->memory_block_slab_manager = std::addressof(Kernel::GetSystemMemoryBlockManager());
this->block_info_manager = std::addressof(Kernel::GetBlockInfoManager());
this->allocate_option = KMemoryManager::EncodeOption(KMemoryManager::Pool_System, KMemoryManager::Direction_FromFront);
this->heap_fill_value = MemoryFillValue_Zero;
this->ipc_fill_value = MemoryFillValue_Zero;
this->stack_fill_value = MemoryFillValue_Zero;
this->cached_physical_linear_region = nullptr;
this->cached_physical_heap_region = nullptr;
this->cached_virtual_heap_region = nullptr;
/* Initialize our implementation. */
this->impl.InitializeForKernel(table, start, end);
/* Initialize our memory block manager. */
return this->memory_block_manager.Initialize(this->address_space_start, this->address_space_end, this->memory_block_slab_manager);
return ResultSuccess();
}
Result KPageTableBase::InitializeForProcess(ams::svc::CreateProcessFlag as_type, bool enable_aslr, bool from_back, KMemoryManager::Pool pool, void *table, KProcessAddress start, KProcessAddress end, KProcessAddress code_address, size_t code_size, KMemoryBlockSlabManager *mem_block_slab_manager, KBlockInfoManager *block_info_manager) {
/* Validate the region. */
MESOSPHERE_ABORT_UNLESS(start <= code_address);
MESOSPHERE_ABORT_UNLESS(code_address < code_address + code_size);
MESOSPHERE_ABORT_UNLESS(code_address + code_size - 1 <= end - 1);
/* Declare variables to hold our region sizes. */
/* Define helpers. */
auto GetSpaceStart = [&](KAddressSpaceInfo::Type type) ALWAYS_INLINE_LAMBDA {
return KAddressSpaceInfo::GetAddressSpaceStart(this->address_space_width, type);
};
auto GetSpaceSize = [&](KAddressSpaceInfo::Type type) ALWAYS_INLINE_LAMBDA {
return KAddressSpaceInfo::GetAddressSpaceSize(this->address_space_width, type);
};
/* Set our width and heap/alias sizes. */
this->address_space_width = GetAddressSpaceWidth(as_type);
size_t alias_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Alias);
size_t heap_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Heap);
/* Adjust heap/alias size if we don't have an alias region. */
if ((as_type & ams::svc::CreateProcessFlag_AddressSpaceMask) == ams::svc::CreateProcessFlag_AddressSpace32BitWithoutAlias) {
heap_region_size += alias_region_size;
alias_region_size = 0;
}
/* Set code regions and determine remaining sizes. */
KProcessAddress process_code_start;
KProcessAddress process_code_end;
size_t stack_region_size;
size_t kernel_map_region_size;
if (this->address_space_width == 39) {
alias_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Alias);
heap_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Heap);
stack_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Stack);
kernel_map_region_size = GetSpaceSize(KAddressSpaceInfo::Type_MapSmall);
this->code_region_start = GetSpaceStart(KAddressSpaceInfo::Type_Map39Bit);
this->code_region_end = this->code_region_start + GetSpaceSize(KAddressSpaceInfo::Type_Map39Bit);
this->alias_code_region_start = this->code_region_start;
this->alias_code_region_end = this->code_region_end;
process_code_start = util::AlignDown(GetInteger(code_address), RegionAlignment);
process_code_end = util::AlignUp(GetInteger(code_address) + code_size, RegionAlignment);
} else {
stack_region_size = 0;
kernel_map_region_size = 0;
this->code_region_start = GetSpaceStart(KAddressSpaceInfo::Type_MapSmall);
this->code_region_end = this->code_region_start + GetSpaceSize(KAddressSpaceInfo::Type_MapSmall);
this->stack_region_start = this->code_region_start;
this->alias_code_region_start = this->code_region_start;
this->alias_code_region_end = GetSpaceStart(KAddressSpaceInfo::Type_MapLarge) + GetSpaceSize(KAddressSpaceInfo::Type_MapLarge);
this->stack_region_end = this->code_region_end;
this->kernel_map_region_start = this->code_region_start;
this->kernel_map_region_end = this->code_region_end;
process_code_start = this->code_region_start;
process_code_end = this->code_region_end;
}
/* Set other basic fields. */
this->enable_aslr = enable_aslr;
this->address_space_start = start;
this->address_space_end = end;
this->is_kernel = false;
this->memory_block_slab_manager = mem_block_slab_manager;
this->block_info_manager = block_info_manager;
/* Determine the region we can place our undetermineds in. */
KProcessAddress alloc_start;
size_t alloc_size;
if ((GetInteger(process_code_start) - GetInteger(this->code_region_start)) >= (GetInteger(end) - GetInteger(process_code_end))) {
alloc_start = this->code_region_start;
alloc_size = GetInteger(process_code_start) - GetInteger(this->code_region_start);
} else {
alloc_start = process_code_end;
alloc_size = GetInteger(end) - GetInteger(process_code_end);
}
const size_t needed_size = (alias_region_size + heap_region_size + stack_region_size + kernel_map_region_size);
R_UNLESS(alloc_size >= needed_size, svc::ResultOutOfMemory());
const size_t remaining_size = alloc_size - needed_size;
/* Determine random placements for each region. */
size_t alias_rnd = 0, heap_rnd = 0, stack_rnd = 0, kmap_rnd = 0;
if (enable_aslr) {
alias_rnd = KSystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * RegionAlignment;
heap_rnd = KSystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * RegionAlignment;
stack_rnd = KSystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * RegionAlignment;
kmap_rnd = KSystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * RegionAlignment;
}
/* Setup heap and alias regions. */
this->alias_region_start = alloc_start + alias_rnd;
this->alias_region_end = this->alias_region_start + alias_region_size;
this->heap_region_start = alloc_start + heap_rnd;
this->heap_region_end = this->heap_region_start + heap_region_size;
if (alias_rnd <= heap_rnd) {
this->heap_region_start += alias_region_size;
this->heap_region_end += alias_region_size;
} else {
this->alias_region_start += heap_region_size;
this->alias_region_end += heap_region_size;
}
/* Setup stack region. */
if (stack_region_size) {
this->stack_region_start = alloc_start + stack_rnd;
this->stack_region_end = this->stack_region_start + stack_region_size;
if (alias_rnd < stack_rnd) {
this->stack_region_start += alias_region_size;
this->stack_region_end += alias_region_size;
} else {
this->alias_region_start += stack_region_size;
this->alias_region_end += stack_region_size;
}
if (heap_rnd < stack_rnd) {
this->stack_region_start += heap_region_size;
this->stack_region_end += heap_region_size;
} else {
this->heap_region_start += stack_region_size;
this->heap_region_end += stack_region_size;
}
}
/* Setup kernel map region. */
if (kernel_map_region_size) {
this->kernel_map_region_start = alloc_start + kmap_rnd;
this->kernel_map_region_end = this->kernel_map_region_start + kernel_map_region_size;
if (alias_rnd < kmap_rnd) {
this->kernel_map_region_start += alias_region_size;
this->kernel_map_region_end += alias_region_size;
} else {
this->alias_region_start += kernel_map_region_size;
this->alias_region_end += kernel_map_region_size;
}
if (heap_rnd < kmap_rnd) {
this->kernel_map_region_start += heap_region_size;
this->kernel_map_region_end += heap_region_size;
} else {
this->heap_region_start += kernel_map_region_size;
this->heap_region_end += kernel_map_region_size;
}
if (stack_region_size) {
if (stack_rnd < kmap_rnd) {
this->kernel_map_region_start += stack_region_size;
this->kernel_map_region_end += stack_region_size;
} else {
this->stack_region_start += kernel_map_region_size;
this->stack_region_end += kernel_map_region_size;
}
}
}
/* Set heap and fill members. */
this->current_heap_end = this->heap_region_start;
this->max_heap_size = 0;
this->mapped_physical_memory_size = 0;
this->mapped_unsafe_physical_memory = 0;
const bool fill_memory = KTargetSystem::IsDebugMemoryFillEnabled();
this->heap_fill_value = fill_memory ? MemoryFillValue_Heap : MemoryFillValue_Zero;
this->ipc_fill_value = fill_memory ? MemoryFillValue_Ipc : MemoryFillValue_Zero;
this->stack_fill_value = fill_memory ? MemoryFillValue_Stack : MemoryFillValue_Zero;
/* Set allocation option. */
this->allocate_option = KMemoryManager::EncodeOption(pool, from_back ? KMemoryManager::Direction_FromBack : KMemoryManager::Direction_FromFront);
/* Ensure that we regions inside our address space. */
auto IsInAddressSpace = [&](KProcessAddress addr) ALWAYS_INLINE_LAMBDA { return this->address_space_start <= addr && addr <= this->address_space_end; };
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->alias_region_start));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->alias_region_end));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->heap_region_start));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->heap_region_end));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->stack_region_start));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->stack_region_end));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->kernel_map_region_start));
MESOSPHERE_ABORT_UNLESS(IsInAddressSpace(this->kernel_map_region_end));
/* Ensure that we selected regions that don't overlap. */
const KProcessAddress alias_start = this->alias_region_start;
const KProcessAddress alias_last = this->alias_region_end - 1;
const KProcessAddress heap_start = this->heap_region_start;
const KProcessAddress heap_last = this->heap_region_end - 1;
const KProcessAddress stack_start = this->stack_region_start;
const KProcessAddress stack_last = this->stack_region_end - 1;
const KProcessAddress kmap_start = this->kernel_map_region_start;
const KProcessAddress kmap_last = this->kernel_map_region_end - 1;
MESOSPHERE_ABORT_UNLESS(alias_last < heap_start || heap_last < alias_start);
MESOSPHERE_ABORT_UNLESS(alias_last < stack_start || stack_last < alias_start);
MESOSPHERE_ABORT_UNLESS(alias_last < kmap_start || kmap_last < alias_start);
MESOSPHERE_ABORT_UNLESS(heap_last < stack_start || stack_last < heap_start);
MESOSPHERE_ABORT_UNLESS(heap_last < kmap_start || kmap_last < heap_start);
/* Initialize our implementation. */
this->impl.InitializeForProcess(table, GetInteger(start), GetInteger(end));
/* Initialize our memory block manager. */
return this->memory_block_manager.Initialize(this->address_space_start, this->address_space_end, this->memory_block_slab_manager);
return ResultSuccess();
}
void KPageTableBase::Finalize() {
/* Finalize memory blocks. */
this->memory_block_manager.Finalize(this->memory_block_slab_manager);
/* Free any unsafe mapped memory. */
if (this->mapped_unsafe_physical_memory) {
Kernel::GetUnsafeMemory().Release(this->mapped_unsafe_physical_memory);
}
/* Invalidate the entire instruction cache. */
cpu::InvalidateEntireInstructionCache();
}
KProcessAddress KPageTableBase::GetRegionAddress(KMemoryState state) const {
switch (state) {
case KMemoryState_Free:
case KMemoryState_Kernel:
return this->address_space_start;
case KMemoryState_Normal:
return this->heap_region_start;
case KMemoryState_Ipc:
case KMemoryState_NonSecureIpc:
case KMemoryState_NonDeviceIpc:
return this->alias_region_start;
case KMemoryState_Stack:
return this->stack_region_start;
case KMemoryState_Io:
case KMemoryState_Static:
case KMemoryState_ThreadLocal:
return this->kernel_map_region_start;
case KMemoryState_Shared:
case KMemoryState_AliasCode:
case KMemoryState_AliasCodeData:
case KMemoryState_Transfered:
case KMemoryState_SharedTransfered:
case KMemoryState_SharedCode:
case KMemoryState_GeneratedCode:
case KMemoryState_CodeOut:
return this->alias_code_region_start;
case KMemoryState_Code:
case KMemoryState_CodeData:
return this->code_region_start;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
}
size_t KPageTableBase::GetRegionSize(KMemoryState state) const {
switch (state) {
case KMemoryState_Free:
case KMemoryState_Kernel:
return this->address_space_end - this->address_space_start;
case KMemoryState_Normal:
return this->heap_region_end - this->heap_region_start;
case KMemoryState_Ipc:
case KMemoryState_NonSecureIpc:
case KMemoryState_NonDeviceIpc:
return this->alias_region_end - this->alias_region_start;
case KMemoryState_Stack:
return this->stack_region_end - this->stack_region_start;
case KMemoryState_Io:
case KMemoryState_Static:
case KMemoryState_ThreadLocal:
return this->kernel_map_region_end - this->kernel_map_region_start;
case KMemoryState_Shared:
case KMemoryState_AliasCode:
case KMemoryState_AliasCodeData:
case KMemoryState_Transfered:
case KMemoryState_SharedTransfered:
case KMemoryState_SharedCode:
case KMemoryState_GeneratedCode:
case KMemoryState_CodeOut:
return this->alias_code_region_end - this->alias_code_region_start;
case KMemoryState_Code:
case KMemoryState_CodeData:
return this->code_region_end - this->code_region_start;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
}
bool KPageTableBase::CanContain(KProcessAddress addr, size_t size, KMemoryState state) const {
const KProcessAddress end = addr + size;
const KProcessAddress last = end - 1;
const KProcessAddress region_start = this->GetRegionAddress(state);
const size_t region_size = this->GetRegionSize(state);
const bool is_in_region = region_start <= addr && addr < end && last <= region_start + region_size - 1;
const bool is_in_heap = !(end <= this->heap_region_start || this->heap_region_end <= addr);
const bool is_in_alias = !(end <= this->alias_region_start || this->alias_region_end <= addr);
switch (state) {
case KMemoryState_Free:
case KMemoryState_Kernel:
return is_in_region;
case KMemoryState_Io:
case KMemoryState_Static:
case KMemoryState_Code:
case KMemoryState_CodeData:
case KMemoryState_Shared:
case KMemoryState_AliasCode:
case KMemoryState_AliasCodeData:
case KMemoryState_Stack:
case KMemoryState_ThreadLocal:
case KMemoryState_Transfered:
case KMemoryState_SharedTransfered:
case KMemoryState_SharedCode:
case KMemoryState_GeneratedCode:
case KMemoryState_CodeOut:
return is_in_region && !is_in_heap && !is_in_alias;
case KMemoryState_Normal:
MESOSPHERE_ASSERT(is_in_heap);
return is_in_region && !is_in_alias;
case KMemoryState_Ipc:
case KMemoryState_NonSecureIpc:
case KMemoryState_NonDeviceIpc:
MESOSPHERE_ASSERT(is_in_alias);
return is_in_region && !is_in_heap;
default:
return false;
}
}
Result KPageTableBase::CheckMemoryState(const KMemoryInfo &info, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr) const {
/* Validate the states match expectation. */
R_UNLESS((info.state & state_mask) == state, svc::ResultInvalidCurrentMemory());
R_UNLESS((info.perm & perm_mask) == perm, svc::ResultInvalidCurrentMemory());
R_UNLESS((info.attribute & attr_mask) == attr, svc::ResultInvalidCurrentMemory());
return ResultSuccess();
}
Result KPageTableBase::CheckMemoryStateContiguous(KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr) const {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Get information about the first block. */
const KProcessAddress last_addr = addr + size - 1;
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(addr);
KMemoryInfo info = it->GetMemoryInfo();
while (true) {
/* Validate against the provided masks. */
R_TRY(this->CheckMemoryState(info, state_mask, state, perm_mask, perm, attr_mask, attr));
/* Break once we're done. */
if (last_addr <= info.GetLastAddress()) {
break;
}
/* Advance our iterator. */
it++;
MESOSPHERE_ASSERT(it != this->memory_block_manager.cend());
info = it->GetMemoryInfo();
}
return ResultSuccess();
}
Result KPageTableBase::CheckMemoryState(KMemoryState *out_state, KMemoryPermission *out_perm, KMemoryAttribute *out_attr, KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr, u32 ignore_attr) const {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Get information about the first block. */
const KProcessAddress last_addr = addr + size - 1;
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(addr);
KMemoryInfo info = it->GetMemoryInfo();
/* Validate all blocks in the range have correct state. */
const KMemoryState first_state = info.state;
const KMemoryPermission first_perm = info.perm;
const KMemoryAttribute first_attr = info.attribute;
while (true) {
/* Validate the current block. */
R_UNLESS(info.state == first_state, svc::ResultInvalidCurrentMemory());
R_UNLESS(info.perm == first_perm, svc::ResultInvalidCurrentMemory());
R_UNLESS((info.attribute | ignore_attr) == (first_attr | ignore_attr), svc::ResultInvalidCurrentMemory());
/* Validate against the provided masks. */
R_TRY(this->CheckMemoryState(info, state_mask, state, perm_mask, perm, attr_mask, attr));
/* Break once we're done. */
if (last_addr <= info.GetLastAddress()) {
break;
}
/* Advance our iterator. */
it++;
MESOSPHERE_ASSERT(it != this->memory_block_manager.cend());
info = it->GetMemoryInfo();
}
/* Write output state. */
if (out_state) {
*out_state = first_state;
}
if (out_perm) {
*out_perm = first_perm;
}
if (out_attr) {
*out_attr = static_cast<KMemoryAttribute>(first_attr & ~ignore_attr);
}
return ResultSuccess();
}
Result KPageTableBase::LockMemoryAndOpen(KPageGroup *out_pg, KPhysicalAddress *out_paddr, KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr, KMemoryPermission new_perm, u32 lock_attr) {
/* Validate basic preconditions. */
MESOSPHERE_ASSERT((lock_attr & attr) == 0);
MESOSPHERE_ASSERT((lock_attr & (KMemoryAttribute_IpcLocked | KMemoryAttribute_DeviceShared)) == 0);
/* Validate the lock request. */
const size_t num_pages = size / PageSize;
R_UNLESS(this->Contains(addr, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check that the output page group is empty, if it exists. */
if (out_pg) {
MESOSPHERE_ASSERT(out_pg->GetNumPages() == 0);
}
/* Check the state. */
KMemoryState old_state;
KMemoryPermission old_perm;
KMemoryAttribute old_attr;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr), addr, size, state_mask | KMemoryState_FlagReferenceCounted, state | KMemoryState_FlagReferenceCounted, perm_mask, perm, attr_mask, attr));
/* Get the physical address, if we're supposed to. */
if (out_paddr != nullptr) {
MESOSPHERE_ABORT_UNLESS(this->GetPhysicalAddress(out_paddr, addr));
}
/* Make the page group, if we're supposed to. */
if (out_pg != nullptr) {
R_TRY(this->MakePageGroup(*out_pg, addr, num_pages));
}
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* Decide on new perm and attr. */
new_perm = (new_perm != KMemoryPermission_None) ? new_perm : old_perm;
KMemoryAttribute new_attr = static_cast<KMemoryAttribute>(old_attr | lock_attr);
/* Update permission, if we need to. */
if (new_perm != old_perm) {
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
const KPageProperties properties = { new_perm, false, (old_attr & KMemoryAttribute_Uncached) != 0, true };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
}
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(allocator), addr, num_pages, old_state, new_perm, new_attr);
/* If we have an output group, open. */
if (out_pg) {
out_pg->Open();
}
return ResultSuccess();
}
Result KPageTableBase::UnlockMemory(KProcessAddress addr, size_t size, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr, KMemoryPermission new_perm, u32 lock_attr, const KPageGroup *pg) {
/* Validate basic preconditions. */
MESOSPHERE_ASSERT((attr_mask & lock_attr) == lock_attr);
MESOSPHERE_ASSERT((attr & lock_attr) == lock_attr);
/* Validate the unlock request. */
const size_t num_pages = size / PageSize;
R_UNLESS(this->Contains(addr, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the state. */
KMemoryState old_state;
KMemoryPermission old_perm;
KMemoryAttribute old_attr;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr), addr, size, state_mask | KMemoryState_FlagReferenceCounted, state | KMemoryState_FlagReferenceCounted, perm_mask, perm, attr_mask, attr));
/* Check the page group. */
if (pg != nullptr) {
R_UNLESS(this->IsValidPageGroup(*pg, addr, num_pages), svc::ResultInvalidMemoryRegion());
}
/* Decide on new perm and attr. */
new_perm = (new_perm != KMemoryPermission_None) ? new_perm : old_perm;
KMemoryAttribute new_attr = static_cast<KMemoryAttribute>(old_attr & ~lock_attr);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* Update permission, if we need to. */
if (new_perm != old_perm) {
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
const KPageProperties properties = { new_perm, false, (old_attr & KMemoryAttribute_Uncached) != 0, false };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
}
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(allocator), addr, num_pages, old_state, new_perm, new_attr);
return ResultSuccess();
}
Result KPageTableBase::QueryInfoImpl(KMemoryInfo *out_info, ams::svc::PageInfo *out_page, KProcessAddress address) const {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
MESOSPHERE_ASSERT(out_info != nullptr);
MESOSPHERE_ASSERT(out_page != nullptr);
const KMemoryBlock *block = this->memory_block_manager.FindBlock(address);
R_UNLESS(block != nullptr, svc::ResultInvalidCurrentMemory());
*out_info = block->GetMemoryInfo();
out_page->flags = 0;
return ResultSuccess();
}
Result KPageTableBase::QueryMappingImpl(KProcessAddress *out, KPhysicalAddress address, size_t size, KMemoryState state) const {
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
MESOSPHERE_ASSERT(out != nullptr);
const KProcessAddress region_start = this->GetRegionAddress(state);
const size_t region_size = this->GetRegionSize(state);
/* Check that the address/size are potentially valid. */
R_UNLESS((address < address + size), svc::ResultNotFound());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry cur_entry = {};
bool cur_valid = false;
TraversalEntry next_entry;
bool next_valid;
size_t tot_size = 0;
next_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), region_start);
next_entry.block_size = (next_entry.block_size - (GetInteger(region_start) & (next_entry.block_size - 1)));
/* Iterate, looking for entry. */
while (true) {
if ((!next_valid && !cur_valid) || (next_valid && cur_valid && next_entry.phys_addr == cur_entry.phys_addr + cur_entry.block_size)) {
cur_entry.block_size += next_entry.block_size;
} else {
if (cur_valid && cur_entry.phys_addr <= address && address + size <= cur_entry.phys_addr + cur_entry.block_size) {
/* Check if this region is valid. */
const KProcessAddress mapped_address = (region_start + tot_size) + (address - cur_entry.phys_addr);
if (R_SUCCEEDED(this->CheckMemoryState(mapped_address, size, KMemoryState_All, state, KMemoryPermission_UserRead, KMemoryPermission_UserRead, KMemoryAttribute_None, KMemoryAttribute_None))) {
/* It is! */
*out = mapped_address;
return ResultSuccess();
}
}
/* Update tracking variables. */
tot_size += cur_entry.block_size;
cur_entry = next_entry;
cur_valid = next_valid;
}
if (cur_entry.block_size + tot_size >= region_size) {
break;
}
next_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
}
/* Check the last entry. */
R_UNLESS(cur_valid, svc::ResultNotFound());
R_UNLESS(cur_entry.phys_addr <= address, svc::ResultNotFound());
R_UNLESS(address + size <= cur_entry.phys_addr + cur_entry.block_size, svc::ResultNotFound());
/* Check if the last region is valid. */
const KProcessAddress mapped_address = (region_start + tot_size) + (address - cur_entry.phys_addr);
R_TRY_CATCH(this->CheckMemoryState(mapped_address, size, KMemoryState_All, state, KMemoryPermission_UserRead, KMemoryPermission_UserRead, KMemoryAttribute_None, KMemoryAttribute_None)) {
R_CONVERT_ALL(svc::ResultNotFound());
} R_END_TRY_CATCH;
/* We found the region. */
*out = mapped_address;
return ResultSuccess();
}
Result KPageTableBase::MapMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size) {
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Validate that the source address's state is valid. */
KMemoryState src_state;
R_TRY(this->CheckMemoryState(std::addressof(src_state), nullptr, nullptr, src_address, size, KMemoryState_FlagCanAlias, KMemoryState_FlagCanAlias, KMemoryPermission_All, KMemoryPermission_UserReadWrite, KMemoryAttribute_All, KMemoryAttribute_None));
/* Validate that the dst address's state is valid. */
R_TRY(this->CheckMemoryState(dst_address, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator for the source. */
KMemoryBlockManagerUpdateAllocator src_allocator(this->memory_block_slab_manager);
R_TRY(src_allocator.GetResult());
/* Create an update allocator for the destination. */
KMemoryBlockManagerUpdateAllocator dst_allocator(this->memory_block_slab_manager);
R_TRY(dst_allocator.GetResult());
/* Map the memory. */
{
/* Determine the number of pages being operated on. */
const size_t num_pages = size / PageSize;
/* Create page groups for the memory being unmapped. */
KPageGroup pg(this->block_info_manager);
/* Create the page group representing the source. */
R_TRY(this->MakePageGroup(pg, src_address, num_pages));
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Reprotect the source as kernel-read/not mapped. */
const KMemoryPermission new_src_perm = static_cast<KMemoryPermission>(KMemoryPermission_KernelRead | KMemoryPermission_NotMapped);
const KMemoryAttribute new_src_attr = static_cast<KMemoryAttribute>(KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked);
const KPageProperties src_properties = { new_src_perm, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, src_properties, OperationType_ChangePermissions, false));
/* Ensure that we unprotect the source pages on failure. */
auto unprot_guard = SCOPE_GUARD {
const KPageProperties unprotect_properties = { KMemoryPermission_UserReadWrite, false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, unprotect_properties, OperationType_ChangePermissions, true));
};
/* Map the alias pages. */
const KPageProperties dst_map_properties = { KMemoryPermission_UserReadWrite, false, false, false };
R_TRY(this->MapPageGroupImpl(updater.GetPageList(), dst_address, pg, dst_map_properties, false));
/* We successfully mapped the alias pages, so we don't need to unprotect the src pages on failure. */
unprot_guard.Cancel();
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(src_allocator), src_address, num_pages, src_state, new_src_perm, new_src_attr);
this->memory_block_manager.Update(std::addressof(dst_allocator), dst_address, num_pages, KMemoryState_Stack, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
}
return ResultSuccess();
}
Result KPageTableBase::UnmapMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size) {
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Validate that the source address's state is valid. */
KMemoryState src_state;
R_TRY(this->CheckMemoryState(std::addressof(src_state), nullptr, nullptr, src_address, size, KMemoryState_FlagCanAlias, KMemoryState_FlagCanAlias, KMemoryPermission_All, KMemoryPermission_NotMapped | KMemoryPermission_KernelRead, KMemoryAttribute_All, KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked));
/* Validate that the dst address's state is valid. */
KMemoryPermission dst_perm;
R_TRY(this->CheckMemoryState(nullptr, std::addressof(dst_perm), nullptr, dst_address, size, KMemoryState_All, KMemoryState_Stack, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Create an update allocator for the source. */
KMemoryBlockManagerUpdateAllocator src_allocator(this->memory_block_slab_manager);
R_TRY(src_allocator.GetResult());
/* Create an update allocator for the destination. */
KMemoryBlockManagerUpdateAllocator dst_allocator(this->memory_block_slab_manager);
R_TRY(dst_allocator.GetResult());
/* Unmap the memory. */
{
/* Determine the number of pages being operated on. */
const size_t num_pages = size / PageSize;
/* Create page groups for the memory being unmapped. */
KPageGroup pg(this->block_info_manager);
/* Create the page group representing the destination. */
R_TRY(this->MakePageGroup(pg, dst_address, num_pages));
/* Ensure the page group is the valid for the source. */
R_UNLESS(this->IsValidPageGroup(pg, src_address, num_pages), svc::ResultInvalidMemoryRegion());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Unmap the aliased copy of the pages. */
const KPageProperties dst_unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), dst_address, num_pages, Null<KPhysicalAddress>, false, dst_unmap_properties, OperationType_Unmap, false));
/* Ensure that we re-map the aliased pages on failure. */
auto remap_guard = SCOPE_GUARD {
const KPageProperties dst_remap_properties = { dst_perm, false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->MapPageGroupImpl(updater.GetPageList(), dst_address, pg, dst_remap_properties, true));
};
/* Try to set the permissions for the source pages back to what they should be. */
const KPageProperties src_properties = { KMemoryPermission_UserReadWrite, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, src_properties, OperationType_ChangePermissions, false));
/* We successfully changed the permissions for the source pages, so we don't need to re-map the dst pages on failure. */
remap_guard.Cancel();
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(src_allocator), src_address, num_pages, src_state, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
this->memory_block_manager.Update(std::addressof(dst_allocator), dst_address, num_pages, KMemoryState_None, KMemoryPermission_None, KMemoryAttribute_None);
}
return ResultSuccess();
}
Result KPageTableBase::MapCodeMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size) {
/* Validate the mapping request. */
R_UNLESS(this->CanContain(dst_address, size, KMemoryState_AliasCode), svc::ResultInvalidMemoryRegion());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify that the source memory is normal heap. */
KMemoryState src_state;
KMemoryPermission src_perm;
R_TRY(this->CheckMemoryState(std::addressof(src_state), std::addressof(src_perm), nullptr, src_address, size, KMemoryState_All, KMemoryState_Normal, KMemoryPermission_All, KMemoryPermission_UserReadWrite, KMemoryAttribute_All, KMemoryAttribute_None));
/* Verify that the destination memory is unmapped. */
R_TRY(this->CheckMemoryState(dst_address, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator for the source. */
KMemoryBlockManagerUpdateAllocator src_allocator(this->memory_block_slab_manager);
R_TRY(src_allocator.GetResult());
/* Create an update allocator for the destination. */
KMemoryBlockManagerUpdateAllocator dst_allocator(this->memory_block_slab_manager);
R_TRY(dst_allocator.GetResult());
/* Map the code memory. */
{
/* Determine the number of pages being operated on. */
const size_t num_pages = size / PageSize;
/* Create page groups for the memory being unmapped. */
KPageGroup pg(this->block_info_manager);
/* Create the page group representing the source. */
R_TRY(this->MakePageGroup(pg, src_address, num_pages));
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Reprotect the source as kernel-read/not mapped. */
const KMemoryPermission new_perm = static_cast<KMemoryPermission>(KMemoryPermission_KernelRead | KMemoryPermission_NotMapped);
const KPageProperties src_properties = { new_perm, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, src_properties, OperationType_ChangePermissions, false));
/* Ensure that we unprotect the source pages on failure. */
auto unprot_guard = SCOPE_GUARD {
const KPageProperties unprotect_properties = { src_perm, false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, unprotect_properties, OperationType_ChangePermissions, true));
};
/* Map the alias pages. */
const KPageProperties dst_properties = { new_perm, false, false, false };
R_TRY(this->MapPageGroupImpl(updater.GetPageList(), dst_address, pg, dst_properties, false));
/* We successfully mapped the alias pages, so we don't need to unprotect the src pages on failure. */
unprot_guard.Cancel();
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(src_allocator), src_address, num_pages, src_state, new_perm, static_cast<KMemoryAttribute>(KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked));
this->memory_block_manager.Update(std::addressof(dst_allocator), dst_address, num_pages, KMemoryState_AliasCode, new_perm, KMemoryAttribute_None);
}
return ResultSuccess();
}
Result KPageTableBase::UnmapCodeMemory(KProcessAddress dst_address, KProcessAddress src_address, size_t size) {
/* Validate the mapping request. */
R_UNLESS(this->CanContain(dst_address, size, KMemoryState_AliasCode), svc::ResultInvalidMemoryRegion());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify that the source memory is locked normal heap. */
R_TRY(this->CheckMemoryState(src_address, size, KMemoryState_All, KMemoryState_Normal, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, static_cast<KMemoryAttribute>(KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked)));
/* Verify the first page of the destination memory is aliasable code, and get its state. */
KMemoryState dst_state;
R_TRY(this->CheckMemoryState(std::addressof(dst_state), nullptr, nullptr, dst_address, PageSize, KMemoryState_FlagCanCodeAlias, KMemoryState_FlagCanCodeAlias, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Verify that the destination memory is contiguous with the same state as the first page. */
R_TRY(this->CheckMemoryStateContiguous(dst_address, size, KMemoryState_All, dst_state, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Unmap. */
{
/* Determine the number of pages being operated on. */
const size_t num_pages = size / PageSize;
/* Create page groups for the memory being unmapped. */
KPageGroup pg(this->block_info_manager);
/* Create the page group representing the destination. */
R_TRY(this->MakePageGroup(pg, dst_address, num_pages));
/* Verify that the page group contains the same pages as the source. */
R_UNLESS(this->IsValidPageGroup(pg, src_address, num_pages), svc::ResultInvalidMemoryRegion());
/* Create an update allocator for the source. */
KMemoryBlockManagerUpdateAllocator src_allocator(this->memory_block_slab_manager);
R_TRY(src_allocator.GetResult());
/* Create an update allocator for the destination. */
KMemoryBlockManagerUpdateAllocator dst_allocator(this->memory_block_slab_manager);
R_TRY(dst_allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Unmap the aliased copy of the pages. */
const KPageProperties dst_unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), dst_address, num_pages, Null<KPhysicalAddress>, false, dst_unmap_properties, OperationType_Unmap, false));
/* Ensure that we re-map the aliased pages on failure. */
auto remap_guard = SCOPE_GUARD {
/* Cache the last address for convenience. */
const auto last_address = dst_address + size - 1;
/* Iterate over the memory we unmapped. */
auto it = this->memory_block_manager.FindIterator(dst_address);
auto pg_it = pg.begin();
KPhysicalAddress pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
size_t pg_size = pg_it->GetNumPages() * PageSize;
while (true) {
/* Get the memory info for the pages we unmapped, convert to property. */
const KMemoryInfo info = it->GetMemoryInfo();
const KPageProperties prev_properties = { info.GetPermission(), false, false, false };
/* Determine the range to map. */
KProcessAddress map_address = std::max(info.GetAddress(), GetInteger(dst_address));
size_t map_size = std::min(GetInteger(dst_address + size), info.GetEndAddress()) - GetInteger(map_address);
MESOSPHERE_ABORT_UNLESS(map_size != 0);
/* While we have pages to map, map them. */
while (map_size > 0) {
/* Check if we're at the end of the physical block. */
if (pg_size == 0) {
/* Ensure there are more pages to map. */
MESOSPHERE_ABORT_UNLESS(pg_it != pg.end());
/* Advance our physical block. */
++pg_it;
pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
pg_size = pg_it->GetNumPages() * PageSize;
}
/* Map whatever we can. */
const size_t cur_size = std::min(pg_size, map_size);
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), map_address, cur_size / PageSize, pg_phys_addr, true, prev_properties, OperationType_Map, true));
/* Advance. */
map_address += cur_size;
map_size -= cur_size;
pg_phys_addr += cur_size;
pg_size -= cur_size;
}
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
/* Validate that we must have re-mapped exactly what we unmapped. */
MESOSPHERE_ABORT_UNLESS((++pg_it) == pg.end());
break;
}
/* Advance. */
++it;
}
};
/* Try to set the permissions for the source pages back to what they should be. */
const KPageProperties src_properties = { KMemoryPermission_UserReadWrite, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), src_address, num_pages, Null<KPhysicalAddress>, false, src_properties, OperationType_ChangePermissions, false));
/* We successfully changed the permissions for the source pages, so we don't need to re-map the dst pages on failure. */
remap_guard.Cancel();
/* Apply the memory block updates. */
this->memory_block_manager.Update(std::addressof(src_allocator), src_address, num_pages, KMemoryState_Normal, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
this->memory_block_manager.Update(std::addressof(dst_allocator), dst_address, num_pages, KMemoryState_None, KMemoryPermission_None, KMemoryAttribute_None);
}
/* If the destination state was alias code, invalidate the entire instruction cache. */
if (dst_state == KMemoryState_AliasCode) {
cpu::InvalidateEntireInstructionCache();
}
return ResultSuccess();
}
KProcessAddress KPageTableBase::FindFreeArea(KProcessAddress region_start, size_t region_num_pages, size_t num_pages, size_t alignment, size_t offset, size_t guard_pages) const {
KProcessAddress address = Null<KProcessAddress>;
if (num_pages <= region_num_pages) {
if (this->IsAslrEnabled()) {
/* Try to directly find a free area up to 8 times. */
for (size_t i = 0; i < 8; i++) {
const size_t random_offset = KSystemControl::GenerateRandomRange(0, (region_num_pages - num_pages - guard_pages) * PageSize / alignment) * alignment;
const KProcessAddress candidate = util::AlignDown(GetInteger(region_start + random_offset), alignment) + offset;
KMemoryInfo info;
ams::svc::PageInfo page_info;
MESOSPHERE_R_ABORT_UNLESS(this->QueryInfoImpl(&info, &page_info, candidate));
if (info.state != KMemoryState_Free) { continue; }
if (!(region_start <= candidate)) { continue; }
if (!(info.GetAddress() + guard_pages * PageSize <= GetInteger(candidate))) { continue; }
if (!(candidate + (num_pages + guard_pages) * PageSize - 1 <= info.GetLastAddress())) { continue; }
if (!(candidate + (num_pages + guard_pages) * PageSize - 1 <= region_start + region_num_pages * PageSize - 1)) { continue; }
address = candidate;
break;
}
/* Fall back to finding the first free area with a random offset. */
if (address == Null<KProcessAddress>) {
/* NOTE: Nintendo does not account for guard pages here. */
/* This may theoretically cause an offset to be chosen that cannot be mapped. */
/* TODO: Should we account for guard pages? */
const size_t offset_pages = KSystemControl::GenerateRandomRange(0, region_num_pages - num_pages);
address = this->memory_block_manager.FindFreeArea(region_start + offset_pages * PageSize, region_num_pages - offset_pages, num_pages, alignment, offset, guard_pages);
}
}
/* Find the first free area. */
if (address == Null<KProcessAddress>) {
address = this->memory_block_manager.FindFreeArea(region_start, region_num_pages, num_pages, alignment, offset, guard_pages);
}
}
return address;
}
Result KPageTableBase::AllocateAndMapPagesImpl(PageLinkedList *page_list, KProcessAddress address, size_t num_pages, const KPageProperties properties) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Create a page group to hold the pages we allocate. */
KPageGroup pg(this->block_info_manager);
/* Allocate the pages. */
R_TRY(Kernel::GetMemoryManager().Allocate(std::addressof(pg), num_pages, this->allocate_option));
/* Ensure that the page group is open while we work with it. */
KScopedPageGroup spg(pg);
/* Clear all pages. */
for (const auto &it : pg) {
std::memset(GetVoidPointer(it.GetAddress()), this->heap_fill_value, it.GetSize());
}
/* Map the pages. */
return this->Operate(page_list, address, num_pages, pg, properties, OperationType_MapGroup, false);
}
Result KPageTableBase::MapPageGroupImpl(PageLinkedList *page_list, KProcessAddress address, const KPageGroup &pg, const KPageProperties properties, bool reuse_ll) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Note the current address, so that we can iterate. */
const KProcessAddress start_address = address;
KProcessAddress cur_address = address;
/* Ensure that we clean up on failure. */
auto mapping_guard = SCOPE_GUARD {
MESOSPHERE_ABORT_UNLESS(!reuse_ll);
if (cur_address != start_address) {
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(page_list, start_address, (cur_address - start_address) / PageSize, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, true));
}
};
/* Iterate, mapping all pages in the group. */
for (const auto &block : pg) {
/* We only allow mapping pages in the heap, and we require we're mapping non-empty blocks. */
MESOSPHERE_ABORT_UNLESS(block.GetAddress() < block.GetLastAddress());
MESOSPHERE_ABORT_UNLESS(IsHeapVirtualAddress(block.GetAddress(), block.GetSize()));
/* Map and advance. */
R_TRY(this->Operate(page_list, cur_address, block.GetNumPages(), GetHeapPhysicalAddress(block.GetAddress()), true, properties, OperationType_Map, reuse_ll));
cur_address += block.GetSize();
}
/* We succeeded! */
mapping_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::MakePageGroup(KPageGroup &pg, KProcessAddress addr, size_t num_pages) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
const size_t size = num_pages * PageSize;
/* We're making a new group, not adding to an existing one. */
R_UNLESS(pg.empty(), svc::ResultInvalidCurrentMemory());
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
R_UNLESS(impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), addr), svc::ResultInvalidCurrentMemory());
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
/* Iterate, adding to group as we go. */
while (tot_size < size) {
R_UNLESS(impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context)), svc::ResultInvalidCurrentMemory());
if (next_entry.phys_addr != (cur_addr + cur_size)) {
const size_t cur_pages = cur_size / PageSize;
R_UNLESS(IsHeapPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
R_TRY(pg.AddBlock(GetHeapVirtualAddress(cur_addr), cur_pages));
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we add the right amount for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* add the last block. */
const size_t cur_pages = cur_size / PageSize;
R_UNLESS(IsHeapPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
R_TRY(pg.AddBlock(GetHeapVirtualAddress(cur_addr), cur_pages));
return ResultSuccess();
}
bool KPageTableBase::IsValidPageGroup(const KPageGroup &pg, KProcessAddress addr, size_t num_pages) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
const size_t size = num_pages * PageSize;
/* Empty groups are necessarily invalid. */
if (pg.empty()) {
return false;
}
auto &impl = this->GetImpl();
/* We're going to validate that the group we'd expect is the group we see. */
auto cur_it = pg.begin();
KVirtualAddress cur_block_address = cur_it->GetAddress();
size_t cur_block_pages = cur_it->GetNumPages();
auto UpdateCurrentIterator = [&]() ALWAYS_INLINE_LAMBDA {
if (cur_block_pages == 0) {
if ((++cur_it) == pg.end()) {
return false;
}
cur_block_address = cur_it->GetAddress();
cur_block_pages = cur_it->GetNumPages();
}
return true;
};
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
if (!impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), addr)) {
return false;
}
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
/* Iterate, comparing expected to actual. */
while (tot_size < size) {
if (!impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context))) {
return false;
}
if (next_entry.phys_addr != (cur_addr + cur_size)) {
const size_t cur_pages = cur_size / PageSize;
if (!IsHeapPhysicalAddress(cur_addr)) {
return false;
}
if (!UpdateCurrentIterator()) {
return false;
}
if (cur_block_address != GetHeapVirtualAddress(cur_addr) || cur_block_pages < cur_pages) {
return false;
}
cur_block_address += cur_size;
cur_block_pages -= cur_pages;
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we compare the right amount for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
if (!IsHeapPhysicalAddress(cur_addr)) {
return false;
}
if (!UpdateCurrentIterator()) {
return false;
}
return cur_block_address == GetHeapVirtualAddress(cur_addr) && cur_block_pages == (cur_size / PageSize);
}
Result KPageTableBase::SetMemoryPermission(KProcessAddress addr, size_t size, ams::svc::MemoryPermission svc_perm) {
const size_t num_pages = size / PageSize;
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify we can change the memory permission. */
KMemoryState old_state;
KMemoryPermission old_perm;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), nullptr, addr, size, KMemoryState_FlagCanReprotect, KMemoryState_FlagCanReprotect, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Determine new perm. */
const KMemoryPermission new_perm = ConvertToKMemoryPermission(svc_perm);
R_SUCCEED_IF(old_perm == new_perm);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { new_perm, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, old_state, new_perm, KMemoryAttribute_None);
return ResultSuccess();
}
Result KPageTableBase::SetProcessMemoryPermission(KProcessAddress addr, size_t size, ams::svc::MemoryPermission svc_perm) {
const size_t num_pages = size / PageSize;
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify we can change the memory permission. */
KMemoryState old_state;
KMemoryPermission old_perm;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), nullptr, addr, size, KMemoryState_FlagCode, KMemoryState_FlagCode, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Make a new page group for the region. */
KPageGroup pg(this->block_info_manager);
/* Determine new perm/state. */
const KMemoryPermission new_perm = ConvertToKMemoryPermission(svc_perm);
KMemoryState new_state = old_state;
const bool is_w = (new_perm & KMemoryPermission_UserWrite) == KMemoryPermission_UserWrite;
const bool is_x = (new_perm & KMemoryPermission_UserExecute) == KMemoryPermission_UserExecute;
const bool was_x = (old_perm & KMemoryPermission_UserExecute) == KMemoryPermission_UserExecute;
MESOSPHERE_ASSERT(!(is_w && is_x));
if (is_w) {
switch (old_state) {
case KMemoryState_Code: new_state = KMemoryState_CodeData; break;
case KMemoryState_AliasCode: new_state = KMemoryState_AliasCodeData; break;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
}
/* Create a page group, if we're setting execute permissions. */
if (is_x) {
R_TRY(this->MakePageGroup(pg, GetInteger(addr), num_pages));
}
/* Succeed if there's nothing to do. */
R_SUCCEED_IF(old_perm == new_perm && old_state == new_state);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { new_perm, false, false, false };
const auto operation = was_x ? OperationType_ChangePermissionsAndRefresh : OperationType_ChangePermissions;
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, operation, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, new_state, new_perm, KMemoryAttribute_None);
/* Ensure cache coherency, if we're setting pages as executable. */
if (is_x) {
for (const auto &block : pg) {
cpu::StoreDataCache(GetVoidPointer(block.GetAddress()), block.GetSize());
}
cpu::InvalidateEntireInstructionCache();
}
return ResultSuccess();
}
Result KPageTableBase::SetMemoryAttribute(KProcessAddress addr, size_t size, u32 mask, u32 attr) {
const size_t num_pages = size / PageSize;
MESOSPHERE_ASSERT((mask | KMemoryAttribute_SetMask) == KMemoryAttribute_SetMask);
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify we can change the memory attribute. */
KMemoryState old_state;
KMemoryPermission old_perm;
KMemoryAttribute old_attr;
constexpr u32 AttributeTestMask = ~(KMemoryAttribute_SetMask | KMemoryAttribute_DeviceShared);
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), std::addressof(old_attr),
addr, size,
KMemoryState_FlagCanChangeAttribute, KMemoryState_FlagCanChangeAttribute,
KMemoryPermission_None, KMemoryPermission_None,
AttributeTestMask, KMemoryAttribute_None, ~AttributeTestMask));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Determine the new attribute. */
const KMemoryAttribute new_attr = static_cast<KMemoryAttribute>(((old_attr & ~mask) | (attr & mask)));
/* Perform operation. */
const KPageProperties properties = { old_perm, false, (new_attr & KMemoryAttribute_Uncached) != 0, false };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissionsAndRefresh, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, old_state, old_perm, new_attr);
return ResultSuccess();
}
Result KPageTableBase::SetHeapSize(KProcessAddress *out, size_t size) {
/* Lock the physical memory mutex. */
KScopedLightLock map_phys_mem_lk(this->map_physical_memory_lock);
/* Try to perform a reduction in heap, instead of an extension. */
KProcessAddress cur_address;
size_t allocation_size;
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Validate that setting heap size is possible at all. */
R_UNLESS(!this->is_kernel, svc::ResultOutOfMemory());
R_UNLESS(size <= static_cast<size_t>(this->heap_region_end - this->heap_region_start), svc::ResultOutOfMemory());
R_UNLESS(size <= this->max_heap_size, svc::ResultOutOfMemory());
if (size < static_cast<size_t>(this->current_heap_end - this->heap_region_start)) {
/* The size being requested is less than the current size, so we need to free the end of the heap. */
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Validate memory state. */
R_TRY(this->CheckMemoryState(this->heap_region_start + size, (this->current_heap_end - this->heap_region_start) - size,
KMemoryState_All, KMemoryState_Normal,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,
KMemoryAttribute_All, KMemoryAttribute_None));
/* Unmap the end of the heap. */
const size_t num_pages = ((this->current_heap_end - this->heap_region_start) - size) / PageSize;
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), this->heap_region_start + size, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Release the memory from the resource limit. */
GetCurrentProcess().ReleaseResource(ams::svc::LimitableResource_PhysicalMemoryMax, num_pages * PageSize);
/* Apply the memory block update. */
this->memory_block_manager.Update(std::addressof(allocator), this->heap_region_start + size, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
/* Update the current heap end. */
this->current_heap_end = this->heap_region_start + size;
/* Set the output. */
*out = this->heap_region_start;
return ResultSuccess();
} else if (size == static_cast<size_t>(this->current_heap_end - this->heap_region_start)) {
/* The size requested is exactly the current size. */
*out = this->heap_region_start;
return ResultSuccess();
} else {
/* We have to allocate memory. Determine how much to allocate and where while the table is locked. */
cur_address = this->current_heap_end;
allocation_size = size - (this->current_heap_end - this->heap_region_start);
}
}
/* Reserve memory for the heap extension. */
KScopedResourceReservation memory_reservation(GetCurrentProcess().GetResourceLimit(), ams::svc::LimitableResource_PhysicalMemoryMax, allocation_size);
R_UNLESS(memory_reservation.Succeeded(), svc::ResultLimitReached());
/* Allocate pages for the heap extension. */
KPageGroup pg(this->block_info_manager);
R_TRY(Kernel::GetMemoryManager().Allocate(std::addressof(pg), allocation_size / PageSize, this->allocate_option));
/* Open the pages in the group for the duration of the call, and close them at the end. */
/* If the mapping succeeds, each page will gain an extra reference, otherwise they will be freed automatically. */
pg.Open();
ON_SCOPE_EXIT { pg.Close(); };
/* Clear all the newly allocated pages. */
for (const auto &it : pg) {
std::memset(GetVoidPointer(it.GetAddress()), this->heap_fill_value, it.GetSize());
}
/* Map the pages. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Ensure that the heap hasn't changed since we began executing. */
MESOSPHERE_ABORT_UNLESS(cur_address == this->current_heap_end);
/* Check the memory state. */
R_TRY(this->CheckMemoryState(this->current_heap_end, allocation_size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Map the pages. */
const size_t num_pages = allocation_size / PageSize;
const KPageProperties map_properties = { KMemoryPermission_UserReadWrite, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), this->current_heap_end, num_pages, pg, map_properties, OperationType_MapGroup, false));
/* We succeeded, so commit our memory reservation. */
memory_reservation.Commit();
/* Apply the memory block update. */
this->memory_block_manager.Update(std::addressof(allocator), this->current_heap_end, num_pages, KMemoryState_Normal, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
/* Update the current heap end. */
this->current_heap_end = this->heap_region_start + size;
/* Set the output. */
*out = this->heap_region_start;
return ResultSuccess();
}
}
Result KPageTableBase::SetMaxHeapSize(size_t size) {
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Only process page tables are allowed to set heap size. */
MESOSPHERE_ASSERT(!this->IsKernel());
this->max_heap_size = size;
return ResultSuccess();
}
Result KPageTableBase::QueryInfo(KMemoryInfo *out_info, ams::svc::PageInfo *out_page_info, KProcessAddress addr) const {
/* If the address is invalid, create a fake block. */
if (!this->Contains(addr, 1)) {
*out_info = {
.address = GetInteger(this->address_space_end),
.size = 0 - GetInteger(this->address_space_end),
.state = static_cast<KMemoryState>(ams::svc::MemoryState_Inaccessible),
.perm = KMemoryPermission_None,
.attribute = KMemoryAttribute_None,
.original_perm = KMemoryPermission_None,
.ipc_lock_count = 0,
.device_use_count = 0,
};
out_page_info->flags = 0;
return ResultSuccess();
}
/* Otherwise, lock the table and query. */
KScopedLightLock lk(this->general_lock);
return this->QueryInfoImpl(out_info, out_page_info, addr);
}
Result KPageTableBase::MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
MESOSPHERE_ASSERT(util::IsAligned(size, PageSize));
MESOSPHERE_ASSERT(size > 0);
R_UNLESS(phys_addr < phys_addr + size, svc::ResultInvalidAddress());
const size_t num_pages = size / PageSize;
const KPhysicalAddress last = phys_addr + size - 1;
/* Get region extents. */
const KProcessAddress region_start = this->GetRegionAddress(KMemoryState_Io);
const size_t region_size = this->GetRegionSize(KMemoryState_Io);
const size_t region_num_pages = region_size / PageSize;
/* Locate the memory region. */
auto region_it = KMemoryLayout::FindContainingRegion(phys_addr);
const auto end_it = KMemoryLayout::GetEnd(phys_addr);
R_UNLESS(region_it != end_it, svc::ResultInvalidAddress());
MESOSPHERE_ASSERT(region_it->Contains(GetInteger(phys_addr)));
/* Ensure that the region is mappable. */
const bool is_rw = perm == KMemoryPermission_UserReadWrite;
do {
/* Check the region attributes. */
R_UNLESS(!region_it->IsDerivedFrom(KMemoryRegionType_Dram), svc::ResultInvalidAddress());
R_UNLESS(!region_it->HasTypeAttribute(KMemoryRegionAttr_UserReadOnly) || !is_rw, svc::ResultInvalidAddress());
R_UNLESS(!region_it->HasTypeAttribute(KMemoryRegionAttr_NoUserMap), svc::ResultInvalidAddress());
/* Check if we're done. */
if (GetInteger(last) <= region_it->GetLastAddress()) {
break;
}
/* Advance. */
region_it++;
} while (region_it != end_it);
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Select an address to map at. */
KProcessAddress addr = Null<KProcessAddress>;
const size_t phys_alignment = std::min(std::min(GetInteger(phys_addr) & -GetInteger(phys_addr), size & -size), MaxPhysicalMapAlignment);
for (s32 block_type = KPageTable::GetMaxBlockType(); block_type >= 0; block_type--) {
const size_t alignment = KPageTable::GetBlockSize(static_cast<KPageTable::BlockType>(block_type));
if (alignment > phys_alignment) {
continue;
}
addr = this->FindFreeArea(region_start, region_num_pages, num_pages, alignment, 0, this->GetNumGuardPages());
if (addr != Null<KProcessAddress>) {
break;
}
}
R_UNLESS(addr != Null<KProcessAddress>, svc::ResultOutOfMemory());
/* Check that we can map IO here. */
MESOSPHERE_ASSERT(this->CanContain(addr, size, KMemoryState_Io));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { perm, true, false, false };
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, phys_addr, true, properties, OperationType_Map, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, KMemoryState_Io, perm, KMemoryAttribute_None);
/* We successfully mapped the pages. */
return ResultSuccess();
}
Result KPageTableBase::MapStatic(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {
MESOSPHERE_UNIMPLEMENTED();
}
Result KPageTableBase::MapRegion(KMemoryRegionType region_type, KMemoryPermission perm) {
MESOSPHERE_UNIMPLEMENTED();
}
Result KPageTableBase::MapPages(KProcessAddress *out_addr, size_t num_pages, size_t alignment, KPhysicalAddress phys_addr, bool is_pa_valid, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(alignment, PageSize) && alignment >= PageSize);
/* Ensure this is a valid map request. */
R_UNLESS(this->CanContain(region_start, region_num_pages * PageSize, state), svc::ResultInvalidCurrentMemory());
R_UNLESS(num_pages < region_num_pages, svc::ResultOutOfMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Find a random address to map at. */
KProcessAddress addr = this->FindFreeArea(region_start, region_num_pages, num_pages, alignment, 0, this->GetNumGuardPages());
R_UNLESS(addr != Null<KProcessAddress>, svc::ResultOutOfMemory());
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(addr), alignment));
MESOSPHERE_ASSERT(this->CanContain(addr, num_pages * PageSize, state));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { perm, false, false, false };
if (is_pa_valid) {
R_TRY(this->Operate(updater.GetPageList(), addr, num_pages, phys_addr, true, properties, OperationType_Map, false));
} else {
R_TRY(this->AllocateAndMapPagesImpl(updater.GetPageList(), addr, num_pages, properties));
}
/* Update the blocks. */
this->memory_block_manager.Update(std::addressof(allocator), addr, num_pages, state, perm, KMemoryAttribute_None);
/* We successfully mapped the pages. */
*out_addr = addr;
return ResultSuccess();
}
Result KPageTableBase::MapPages(KProcessAddress address, size_t num_pages, KMemoryState state, KMemoryPermission perm) {
/* Check that the map is in range. */
const size_t size = num_pages * PageSize;
R_UNLESS(this->CanContain(address, size, state), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Map the pages. */
const KPageProperties properties = { perm, false, false, false };
R_TRY(this->AllocateAndMapPagesImpl(updater.GetPageList(), address, num_pages, properties));
/* Update the blocks. */
this->memory_block_manager.Update(std::addressof(allocator), address, num_pages, state, perm, KMemoryAttribute_None);
return ResultSuccess();
}
Result KPageTableBase::UnmapPages(KProcessAddress address, size_t num_pages, KMemoryState state) {
/* Check that the unmap is in range. */
const size_t size = num_pages * PageSize;
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, state, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform the unmap. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), address, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
return ResultSuccess();
}
Result KPageTableBase::MapPageGroup(KProcessAddress *out_addr, const KPageGroup &pg, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
/* Ensure this is a valid map request. */
const size_t num_pages = pg.GetNumPages();
R_UNLESS(this->CanContain(region_start, region_num_pages * PageSize, state), svc::ResultInvalidCurrentMemory());
R_UNLESS(num_pages < region_num_pages, svc::ResultOutOfMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Find a random address to map at. */
KProcessAddress addr = this->FindFreeArea(region_start, region_num_pages, num_pages, PageSize, 0, this->GetNumGuardPages());
R_UNLESS(addr != Null<KProcessAddress>, svc::ResultOutOfMemory());
MESOSPHERE_ASSERT(this->CanContain(addr, num_pages * PageSize, state));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { perm, state == KMemoryState_Io, false, false };
R_TRY(this->MapPageGroupImpl(updater.GetPageList(), addr, pg, properties, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, state, perm, KMemoryAttribute_None);
/* We successfully mapped the pages. */
*out_addr = addr;
return ResultSuccess();
}
Result KPageTableBase::MapPageGroup(KProcessAddress addr, const KPageGroup &pg, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
/* Ensure this is a valid map request. */
const size_t num_pages = pg.GetNumPages();
const size_t size = num_pages * PageSize;
R_UNLESS(this->CanContain(addr, size, state), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check if state allows us to map. */
R_TRY(this->CheckMemoryState(addr, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { perm, state == KMemoryState_Io, false, false };
R_TRY(this->MapPageGroupImpl(updater.GetPageList(), addr, pg, properties, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, state, perm, KMemoryAttribute_None);
/* We successfully mapped the pages. */
return ResultSuccess();
}
Result KPageTableBase::UnmapPageGroup(KProcessAddress address, const KPageGroup &pg, KMemoryState state) {
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
/* Ensure this is a valid unmap request. */
const size_t num_pages = pg.GetNumPages();
const size_t size = num_pages * PageSize;
R_UNLESS(this->CanContain(address, size, state), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check if state allows us to unmap. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, state, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Check that the page group is valid. */
R_UNLESS(this->IsValidPageGroup(pg, address, num_pages), svc::ResultInvalidCurrentMemory());
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform unmapping operation. */
const KPageProperties properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), address, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_Unmap, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
return ResultSuccess();
}
Result KPageTableBase::MakeAndOpenPageGroup(KPageGroup *out, KProcessAddress address, size_t num_pages, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr) {
/* Ensure that the page group isn't null. */
MESOSPHERE_ASSERT(out != nullptr);
/* Make sure that the region we're mapping is valid for the table. */
const size_t size = num_pages * PageSize;
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check if state allows us to create the group. */
R_TRY(this->CheckMemoryState(address, size, state_mask | KMemoryState_FlagReferenceCounted, state | KMemoryState_FlagReferenceCounted, perm_mask, perm, attr_mask, attr));
/* Create a new page group for the region. */
R_TRY(this->MakePageGroup(*out, address, num_pages));
/* Open a new reference to the pages in the group. */
out->Open();
return ResultSuccess();
}
Result KPageTableBase::MakeAndOpenPageGroupContiguous(KPageGroup *out, KProcessAddress address, size_t num_pages, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr) {
/* Ensure that the page group isn't null. */
MESOSPHERE_ASSERT(out != nullptr);
/* Make sure that the region we're mapping is valid for the table. */
const size_t size = num_pages * PageSize;
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check if state allows us to create the group. */
R_TRY(this->CheckMemoryStateContiguous(address, size, state_mask | KMemoryState_FlagReferenceCounted, state | KMemoryState_FlagReferenceCounted, perm_mask, perm, attr_mask, attr));
/* Create a new page group for the region. */
R_TRY(this->MakePageGroup(*out, address, num_pages));
/* Open a new reference to the pages in the group. */
out->Open();
return ResultSuccess();
}
Result KPageTableBase::InvalidateProcessDataCache(KProcessAddress address, size_t size) {
/* Check that the region is in range. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryStateContiguous(address, size, KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted, KMemoryPermission_UserReadWrite, KMemoryPermission_UserReadWrite, KMemoryAttribute_Uncached, KMemoryAttribute_None));
/* Get the impl. */
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), address);
R_UNLESS(traverse_valid, svc::ResultInvalidCurrentMemory());
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
/* Iterate. */
while (tot_size < size) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
R_UNLESS(traverse_valid, svc::ResultInvalidCurrentMemory());
if (next_entry.phys_addr != (cur_addr + cur_size)) {
/* Check that the pages are linearly mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Invalidate the block. */
if (cur_size > 0) {
/* NOTE: Nintendo does not check the result of invalidation. */
cpu::InvalidateDataCache(GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), cur_size);
}
/* Advance. */
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we use the right size for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* Check that the last block is linearly mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Invalidate the last block. */
if (cur_size > 0) {
/* NOTE: Nintendo does not check the result of invalidation. */
cpu::InvalidateDataCache(GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), cur_size);
}
return ResultSuccess();
}
Result KPageTableBase::LockForDeviceAddressSpace(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm, bool is_aligned) {
/* Lightly validate the range before doing anything else. */
const size_t num_pages = size / PageSize;
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
const u32 test_state = (is_aligned ? KMemoryState_FlagCanAlignedDeviceMap : KMemoryState_FlagCanDeviceMap);
R_TRY(this->CheckMemoryState(address, size, test_state, test_state, perm, perm, KMemoryAttribute_AnyLocked | KMemoryAttribute_IpcLocked | KMemoryAttribute_Locked, 0, KMemoryAttribute_DeviceShared));
/* Make the page group, if we should. */
if (out != nullptr) {
R_TRY(this->MakePageGroup(*out, address, num_pages));
}
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* Update the memory blocks. */
this->memory_block_manager.UpdateLock(std::addressof(allocator), address, num_pages, &KMemoryBlock::ShareToDevice, KMemoryPermission_None);
/* Open the page group. */
if (out != nullptr) {
out->Open();
}
return ResultSuccess();
}
Result KPageTableBase::UnlockForDeviceAddressSpace(KProcessAddress address, size_t size) {
/* Lightly validate the range before doing anything else. */
const size_t num_pages = size / PageSize;
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryStateContiguous(address, size,
KMemoryState_FlagCanDeviceMap, KMemoryState_FlagCanDeviceMap,
KMemoryPermission_None, KMemoryPermission_None,
KMemoryAttribute_AnyLocked | KMemoryAttribute_DeviceShared | KMemoryAttribute_Locked, KMemoryAttribute_DeviceShared));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* Update the memory blocks. */
this->memory_block_manager.UpdateLock(std::addressof(allocator), address, num_pages, &KMemoryBlock::UnshareToDevice, KMemoryPermission_None);
return ResultSuccess();
}
Result KPageTableBase::LockForIpcUserBuffer(KPhysicalAddress *out, KProcessAddress address, size_t size) {
return this->LockMemoryAndOpen(nullptr, out, address, size,
KMemoryState_FlagCanIpcUserBuffer, KMemoryState_FlagCanIpcUserBuffer,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,
KMemoryAttribute_All, KMemoryAttribute_None,
static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite),
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked);
}
Result KPageTableBase::UnlockForIpcUserBuffer(KProcessAddress address, size_t size) {
return this->UnlockMemory(address, size,
KMemoryState_FlagCanIpcUserBuffer, KMemoryState_FlagCanIpcUserBuffer,
KMemoryPermission_None, KMemoryPermission_None,
KMemoryAttribute_All, KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked,
KMemoryPermission_UserReadWrite,
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked, nullptr);
}
Result KPageTableBase::LockForTransferMemory(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm) {
return this->LockMemoryAndOpen(out, nullptr, address, size,
KMemoryState_FlagCanTransfer, KMemoryState_FlagCanTransfer,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,
KMemoryAttribute_All, KMemoryAttribute_None,
perm,
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked);
}
Result KPageTableBase::UnlockForTransferMemory(KProcessAddress address, size_t size, const KPageGroup &pg) {
return this->UnlockMemory(address, size,
KMemoryState_FlagCanTransfer, KMemoryState_FlagCanTransfer,
KMemoryPermission_None, KMemoryPermission_None,
KMemoryAttribute_All, KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked,
KMemoryPermission_UserReadWrite,
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked, std::addressof(pg));
}
Result KPageTableBase::LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size) {
return this->LockMemoryAndOpen(out, nullptr, address, size,
KMemoryState_FlagCanCodeMemory, KMemoryState_FlagCanCodeMemory,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,
KMemoryAttribute_All, KMemoryAttribute_None,
static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite),
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked);
}
Result KPageTableBase::UnlockForCodeMemory(KProcessAddress address, size_t size, const KPageGroup &pg) {
return this->UnlockMemory(address, size,
KMemoryState_FlagCanCodeMemory, KMemoryState_FlagCanCodeMemory,
KMemoryPermission_None, KMemoryPermission_None,
KMemoryAttribute_All, KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked,
KMemoryPermission_UserReadWrite,
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked, std::addressof(pg));
}
Result KPageTableBase::CopyMemoryFromLinearToUser(KProcessAddress dst_addr, size_t size, KProcessAddress src_addr, u32 src_state_mask, u32 src_state, KMemoryPermission src_test_perm, u32 src_attr_mask, u32 src_attr) {
/* Lightly validate the range before doing anything else. */
R_UNLESS(this->Contains(src_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check memory state. */
R_TRY(this->CheckMemoryStateContiguous(src_addr, size, src_state_mask, src_state, src_test_perm, src_test_perm, src_attr_mask | KMemoryAttribute_Uncached, src_attr));
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), src_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
auto PerformCopy = [&] ALWAYS_INLINE_LAMBDA () -> Result {
/* Ensure the address is linear mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Copy as much aligned data as we can. */
if (cur_size >= sizeof(u32)) {
const size_t copy_size = util::AlignDown(cur_size, sizeof(u32));
R_UNLESS(UserspaceAccess::CopyMemoryToUserAligned32Bit(GetVoidPointer(dst_addr), GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), copy_size), svc::ResultInvalidCurrentMemory());
dst_addr += copy_size;
cur_addr += copy_size;
cur_size -= copy_size;
}
/* Copy remaining data. */
if (cur_size > 0) {
R_UNLESS(UserspaceAccess::CopyMemoryToUser(GetVoidPointer(dst_addr), GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), cur_size), svc::ResultInvalidCurrentMemory());
}
return ResultSuccess();
};
/* Iterate. */
while (tot_size < size) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
if (next_entry.phys_addr != (cur_addr + cur_size)) {
/* Perform copy. */
R_TRY(PerformCopy());
/* Advance. */
dst_addr += cur_size;
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we use the right size for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* Perform copy for the last block. */
R_TRY(PerformCopy());
}
return ResultSuccess();
}
Result KPageTableBase::CopyMemoryFromLinearToKernel(KProcessAddress dst_addr, size_t size, KProcessAddress src_addr, u32 src_state_mask, u32 src_state, KMemoryPermission src_test_perm, u32 src_attr_mask, u32 src_attr) {
/* Lightly validate the range before doing anything else. */
R_UNLESS(this->Contains(src_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check memory state. */
R_TRY(this->CheckMemoryStateContiguous(src_addr, size, src_state_mask, src_state, src_test_perm, src_test_perm, src_attr_mask | KMemoryAttribute_Uncached, src_attr));
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), src_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
auto PerformCopy = [&] ALWAYS_INLINE_LAMBDA () -> Result {
/* Ensure the address is linear mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Copy the data. */
std::memcpy(GetVoidPointer(dst_addr), GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), cur_size);
return ResultSuccess();
};
/* Iterate. */
while (tot_size < size) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
if (next_entry.phys_addr != (cur_addr + cur_size)) {
/* Perform copy. */
R_TRY(PerformCopy());
/* Advance. */
dst_addr += cur_size;
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we use the right size for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* Perform copy for the last block. */
R_TRY(PerformCopy());
}
return ResultSuccess();
}
Result KPageTableBase::CopyMemoryFromUserToLinear(KProcessAddress dst_addr, size_t size, u32 dst_state_mask, u32 dst_state, KMemoryPermission dst_test_perm, u32 dst_attr_mask, u32 dst_attr, KProcessAddress src_addr) {
/* Lightly validate the range before doing anything else. */
R_UNLESS(this->Contains(dst_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check memory state. */
R_TRY(this->CheckMemoryStateContiguous(dst_addr, size, dst_state_mask, dst_state, dst_test_perm, dst_test_perm, dst_attr_mask | KMemoryAttribute_Uncached, dst_attr));
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), dst_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
auto PerformCopy = [&] ALWAYS_INLINE_LAMBDA () -> Result {
/* Ensure the address is linear mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Copy as much aligned data as we can. */
if (cur_size >= sizeof(u32)) {
const size_t copy_size = util::AlignDown(cur_size, sizeof(u32));
R_UNLESS(UserspaceAccess::CopyMemoryFromUserAligned32Bit(GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), GetVoidPointer(src_addr), copy_size), svc::ResultInvalidCurrentMemory());
src_addr += copy_size;
cur_addr += copy_size;
cur_size -= copy_size;
}
/* Copy remaining data. */
if (cur_size > 0) {
R_UNLESS(UserspaceAccess::CopyMemoryFromUser(GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), GetVoidPointer(src_addr), cur_size), svc::ResultInvalidCurrentMemory());
}
return ResultSuccess();
};
/* Iterate. */
while (tot_size < size) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
if (next_entry.phys_addr != (cur_addr + cur_size)) {
/* Perform copy. */
R_TRY(PerformCopy());
/* Advance. */
src_addr += cur_size;
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we use the right size for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* Perform copy for the last block. */
R_TRY(PerformCopy());
}
return ResultSuccess();
}
Result KPageTableBase::CopyMemoryFromKernelToLinear(KProcessAddress dst_addr, size_t size, u32 dst_state_mask, u32 dst_state, KMemoryPermission dst_test_perm, u32 dst_attr_mask, u32 dst_attr, KProcessAddress src_addr) {
/* Lightly validate the range before doing anything else. */
R_UNLESS(this->Contains(dst_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check memory state. */
R_TRY(this->CheckMemoryStateContiguous(dst_addr, size, dst_state_mask, dst_state, dst_test_perm, dst_test_perm, dst_attr_mask | KMemoryAttribute_Uncached, dst_attr));
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), dst_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_addr = next_entry.phys_addr;
size_t cur_size = next_entry.block_size - (GetInteger(cur_addr) & (next_entry.block_size - 1));
size_t tot_size = cur_size;
auto PerformCopy = [&] ALWAYS_INLINE_LAMBDA () -> Result {
/* Ensure the address is linear mapped. */
R_UNLESS(IsLinearMappedPhysicalAddress(cur_addr), svc::ResultInvalidCurrentMemory());
/* Copy the data. */
std::memcpy(GetVoidPointer(GetLinearMappedVirtualAddress(cur_addr)), GetVoidPointer(src_addr), cur_size);
return ResultSuccess();
};
/* Iterate. */
while (tot_size < size) {
/* Continue the traversal. */
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
if (next_entry.phys_addr != (cur_addr + cur_size)) {
/* Perform copy. */
R_TRY(PerformCopy());
/* Advance. */
src_addr += cur_size;
cur_addr = next_entry.phys_addr;
cur_size = next_entry.block_size;
} else {
cur_size += next_entry.block_size;
}
tot_size += next_entry.block_size;
}
/* Ensure we use the right size for the last block. */
if (tot_size > size) {
cur_size -= (tot_size - size);
}
/* Perform copy for the last block. */
R_TRY(PerformCopy());
}
return ResultSuccess();
}
Result KPageTableBase::CopyMemoryFromHeapToHeap(KPageTableBase &dst_page_table, KProcessAddress dst_addr, size_t size, u32 dst_state_mask, u32 dst_state, KMemoryPermission dst_test_perm, u32 dst_attr_mask, u32 dst_attr, KProcessAddress src_addr, u32 src_state_mask, u32 src_state, KMemoryPermission src_test_perm, u32 src_attr_mask, u32 src_attr) {
/* For convenience, alias this. */
KPageTableBase &src_page_table = *this;
/* Lightly validate the ranges before doing anything else. */
R_UNLESS(src_page_table.Contains(src_addr, size), svc::ResultInvalidCurrentMemory());
R_UNLESS(dst_page_table.Contains(dst_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Get the table locks. */
KLightLock &lock_0 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? src_page_table.general_lock : dst_page_table.general_lock;
KLightLock &lock_1 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? dst_page_table.general_lock : src_page_table.general_lock;
/* Lock the first lock. */
KScopedLightLock lk0(lock_0);
/* If necessary, lock the second lock. */
std::optional<KScopedLightLock> lk1;
if (std::addressof(lock_0) != std::addressof(lock_1)) {
lk1.emplace(lock_1);
}
/* Check memory state. */
R_TRY(src_page_table.CheckMemoryStateContiguous(src_addr, size, src_state_mask, src_state, src_test_perm, src_test_perm, src_attr_mask | KMemoryAttribute_Uncached, src_attr));
R_TRY(dst_page_table.CheckMemoryStateContiguous(dst_addr, size, dst_state_mask, dst_state, dst_test_perm, dst_test_perm, dst_attr_mask | KMemoryAttribute_Uncached, dst_attr));
/* Get implementations. */
auto &src_impl = src_page_table.GetImpl();
auto &dst_impl = dst_page_table.GetImpl();
/* Prepare for traversal. */
TraversalContext src_context;
TraversalContext dst_context;
TraversalEntry src_next_entry;
TraversalEntry dst_next_entry;
bool traverse_valid;
/* Begin traversal. */
traverse_valid = src_impl.BeginTraversal(std::addressof(src_next_entry), std::addressof(src_context), src_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
traverse_valid = dst_impl.BeginTraversal(std::addressof(dst_next_entry), std::addressof(dst_context), dst_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_src_block_addr = src_next_entry.phys_addr;
KPhysicalAddress cur_dst_block_addr = dst_next_entry.phys_addr;
size_t cur_src_size = src_next_entry.block_size - (GetInteger(cur_src_block_addr) & (src_next_entry.block_size - 1));
size_t cur_dst_size = dst_next_entry.block_size - (GetInteger(cur_dst_block_addr) & (dst_next_entry.block_size - 1));
/* Adjust the initial block sizes. */
src_next_entry.block_size = cur_src_size;
dst_next_entry.block_size = cur_dst_size;
/* Before we get any crazier, succeed if there's nothing to do. */
R_SUCCEED_IF(size == 0);
/* We're going to manage dual traversal via an offset against the total size. */
KPhysicalAddress cur_src_addr = cur_src_block_addr;
KPhysicalAddress cur_dst_addr = cur_dst_block_addr;
size_t cur_min_size = std::min<size_t>(cur_src_size, cur_dst_size);
/* Iterate. */
size_t ofs = 0;
while (ofs < size) {
/* Determine how much we can copy this iteration. */
const size_t cur_copy_size = std::min<size_t>(cur_min_size, size - ofs);
/* If we need to advance the traversals, do so. */
bool updated_src = false, updated_dst = false, skip_copy = false;
if (ofs + cur_copy_size != size) {
if (cur_src_addr + cur_min_size == cur_src_block_addr + cur_src_size) {
/* Continue the src traversal. */
traverse_valid = src_impl.ContinueTraversal(std::addressof(src_next_entry), std::addressof(src_context));
MESOSPHERE_ASSERT(traverse_valid);
/* Update source. */
updated_src = cur_src_addr + cur_min_size != GetInteger(src_next_entry.phys_addr);
}
if (cur_dst_addr + cur_min_size == dst_next_entry.phys_addr + dst_next_entry.block_size) {
/* Continue the dst traversal. */
traverse_valid = dst_impl.ContinueTraversal(std::addressof(dst_next_entry), std::addressof(dst_context));
MESOSPHERE_ASSERT(traverse_valid);
/* Update destination. */
updated_dst = cur_dst_addr + cur_min_size != GetInteger(dst_next_entry.phys_addr);
}
/* If we didn't update either of source/destination, skip the copy this iteration. */
if (!updated_src && !updated_dst) {
skip_copy = true;
/* Update the source block address. */
cur_src_block_addr = src_next_entry.phys_addr;
}
}
/* Do the copy, unless we're skipping it. */
if (!skip_copy) {
/* We need both ends of the copy to be heap blocks. */
R_UNLESS(IsHeapPhysicalAddress(cur_src_addr), svc::ResultInvalidCurrentMemory());
R_UNLESS(IsHeapPhysicalAddress(cur_dst_addr), svc::ResultInvalidCurrentMemory());
/* Copy the data. */
std::memcpy(GetVoidPointer(GetHeapVirtualAddress(cur_dst_addr)), GetVoidPointer(GetHeapVirtualAddress(cur_src_addr)), cur_copy_size);
/* Update. */
cur_src_block_addr = src_next_entry.phys_addr;
cur_src_addr = updated_src ? cur_src_block_addr : cur_src_addr + cur_copy_size;
cur_dst_block_addr = dst_next_entry.phys_addr;
cur_dst_addr = updated_dst ? cur_dst_block_addr : cur_dst_addr + cur_copy_size;
/* Advance offset. */
ofs += cur_copy_size;
}
/* Update min size. */
cur_src_size = src_next_entry.block_size;
cur_dst_size = dst_next_entry.block_size;
cur_min_size = std::min<size_t>(cur_src_block_addr - cur_src_addr + cur_src_size, cur_dst_block_addr - cur_dst_addr + cur_dst_size);
}
}
return ResultSuccess();
}
Result KPageTableBase::CopyMemoryFromHeapToHeapWithoutCheckDestination(KPageTableBase &dst_page_table, KProcessAddress dst_addr, size_t size, u32 dst_state_mask, u32 dst_state, KMemoryPermission dst_test_perm, u32 dst_attr_mask, u32 dst_attr, KProcessAddress src_addr, u32 src_state_mask, u32 src_state, KMemoryPermission src_test_perm, u32 src_attr_mask, u32 src_attr) {
/* For convenience, alias this. */
KPageTableBase &src_page_table = *this;
/* Lightly validate the ranges before doing anything else. */
R_UNLESS(src_page_table.Contains(src_addr, size), svc::ResultInvalidCurrentMemory());
R_UNLESS(dst_page_table.Contains(dst_addr, size), svc::ResultInvalidCurrentMemory());
/* Copy the memory. */
{
/* Get the table locks. */
KLightLock &lock_0 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? src_page_table.general_lock : dst_page_table.general_lock;
KLightLock &lock_1 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? dst_page_table.general_lock : src_page_table.general_lock;
/* Lock the first lock. */
KScopedLightLock lk0(lock_0);
/* If necessary, lock the second lock. */
std::optional<KScopedLightLock> lk1;
if (std::addressof(lock_0) != std::addressof(lock_1)) {
lk1.emplace(lock_1);
}
/* Check memory state. */
R_TRY(src_page_table.CheckMemoryStateContiguous(src_addr, size, src_state_mask, src_state, src_test_perm, src_test_perm, src_attr_mask | KMemoryAttribute_Uncached, src_attr));
/* Get implementations. */
auto &src_impl = src_page_table.GetImpl();
auto &dst_impl = dst_page_table.GetImpl();
/* Prepare for traversal. */
TraversalContext src_context;
TraversalContext dst_context;
TraversalEntry src_next_entry;
TraversalEntry dst_next_entry;
bool traverse_valid;
/* Begin traversal. */
traverse_valid = src_impl.BeginTraversal(std::addressof(src_next_entry), std::addressof(src_context), src_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
traverse_valid = dst_impl.BeginTraversal(std::addressof(dst_next_entry), std::addressof(dst_context), dst_addr);
MESOSPHERE_ABORT_UNLESS(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_src_block_addr = src_next_entry.phys_addr;
KPhysicalAddress cur_dst_block_addr = dst_next_entry.phys_addr;
size_t cur_src_size = src_next_entry.block_size - (GetInteger(cur_src_block_addr) & (src_next_entry.block_size - 1));
size_t cur_dst_size = dst_next_entry.block_size - (GetInteger(cur_dst_block_addr) & (dst_next_entry.block_size - 1));
/* Adjust the initial block sizes. */
src_next_entry.block_size = cur_src_size;
dst_next_entry.block_size = cur_dst_size;
/* Before we get any crazier, succeed if there's nothing to do. */
R_SUCCEED_IF(size == 0);
/* We're going to manage dual traversal via an offset against the total size. */
KPhysicalAddress cur_src_addr = cur_src_block_addr;
KPhysicalAddress cur_dst_addr = cur_dst_block_addr;
size_t cur_min_size = std::min<size_t>(cur_src_size, cur_dst_size);
/* Iterate. */
size_t ofs = 0;
while (ofs < size) {
/* Determine how much we can copy this iteration. */
const size_t cur_copy_size = std::min<size_t>(cur_min_size, size - ofs);
/* If we need to advance the traversals, do so. */
bool updated_src = false, updated_dst = false, skip_copy = false;
if (ofs + cur_copy_size != size) {
if (cur_src_addr + cur_min_size == cur_src_block_addr + cur_src_size) {
/* Continue the src traversal. */
traverse_valid = src_impl.ContinueTraversal(std::addressof(src_next_entry), std::addressof(src_context));
MESOSPHERE_ASSERT(traverse_valid);
/* Update source. */
updated_src = cur_src_addr + cur_min_size != GetInteger(src_next_entry.phys_addr);
}
if (cur_dst_addr + cur_min_size == dst_next_entry.phys_addr + dst_next_entry.block_size) {
/* Continue the dst traversal. */
traverse_valid = dst_impl.ContinueTraversal(std::addressof(dst_next_entry), std::addressof(dst_context));
MESOSPHERE_ASSERT(traverse_valid);
/* Update destination. */
updated_dst = cur_dst_addr + cur_min_size != GetInteger(dst_next_entry.phys_addr);
}
/* If we didn't update either of source/destination, skip the copy this iteration. */
if (!updated_src && !updated_dst) {
skip_copy = true;
/* Update the source block address. */
cur_src_block_addr = src_next_entry.phys_addr;
}
}
/* Do the copy, unless we're skipping it. */
if (!skip_copy) {
/* We need both ends of the copy to be heap blocks. */
R_UNLESS(IsHeapPhysicalAddress(cur_src_addr), svc::ResultInvalidCurrentMemory());
R_UNLESS(IsHeapPhysicalAddress(cur_dst_addr), svc::ResultInvalidCurrentMemory());
/* Copy the data. */
std::memcpy(GetVoidPointer(GetHeapVirtualAddress(cur_dst_addr)), GetVoidPointer(GetHeapVirtualAddress(cur_src_addr)), cur_copy_size);
/* Update. */
cur_src_block_addr = src_next_entry.phys_addr;
cur_src_addr = updated_src ? cur_src_block_addr : cur_src_addr + cur_copy_size;
cur_dst_block_addr = dst_next_entry.phys_addr;
cur_dst_addr = updated_dst ? cur_dst_block_addr : cur_dst_addr + cur_copy_size;
/* Advance offset. */
ofs += cur_copy_size;
}
/* Update min size. */
cur_src_size = src_next_entry.block_size;
cur_dst_size = dst_next_entry.block_size;
cur_min_size = std::min<size_t>(cur_src_block_addr - cur_src_addr + cur_src_size, cur_dst_block_addr - cur_dst_addr + cur_dst_size);
}
}
return ResultSuccess();
}
Result KPageTableBase::SetupForIpcClient(PageLinkedList *page_list, KProcessAddress address, size_t size, KMemoryPermission test_perm, KMemoryState dst_state) {
/* Validate pre-conditions. */
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
MESOSPHERE_ASSERT(test_perm == KMemoryPermission_UserReadWrite || test_perm == KMemoryPermission_UserRead);
/* Check that the address is in range. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Get the source permission. */
const auto src_perm = static_cast<KMemoryPermission>((test_perm == KMemoryPermission_UserReadWrite) ? KMemoryPermission_KernelReadWrite | KMemoryPermission_NotMapped : KMemoryPermission_UserRead);
/* Get aligned extents. */
const KProcessAddress aligned_src_start = util::AlignDown(GetInteger(address), PageSize);
const KProcessAddress aligned_src_end = util::AlignUp(GetInteger(address) + size, PageSize);
const KProcessAddress mapping_src_start = util::AlignUp(GetInteger(address), PageSize);
const KProcessAddress mapping_src_end = util::AlignDown(GetInteger(address) + size, PageSize);
const auto aligned_src_last = GetInteger(aligned_src_end) - 1;
const auto mapping_src_last = GetInteger(mapping_src_end) - 1;
/* Get the test state and attribute mask. */
u32 test_state;
u32 test_attr_mask;
switch (dst_state) {
case KMemoryState_Ipc:
test_state = KMemoryState_FlagCanUseIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_DeviceShared | KMemoryAttribute_Locked;
break;
case KMemoryState_NonSecureIpc:
test_state = KMemoryState_FlagCanUseNonSecureIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
case KMemoryState_NonDeviceIpc:
test_state = KMemoryState_FlagCanUseNonDeviceIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
default:
return svc::ResultInvalidCombination();
}
/* Ensure that on failure, we roll back appropriately. */
size_t mapped_size = 0;
auto unmap_guard = SCOPE_GUARD {
if (mapped_size > 0) {
/* Determine where the mapping ends. */
const auto mapped_end = GetInteger(mapping_src_start) + mapped_size;
const auto mapped_last = mapped_end - 1;
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(mapping_src_start);
while (true) {
const KMemoryInfo info = it->GetMemoryInfo();
const auto cur_start = info.GetAddress() >= GetInteger(mapping_src_start) ? info.GetAddress() : GetInteger(mapping_src_start);
const auto cur_end = mapped_last <= info.GetLastAddress() ? mapped_end : info.GetEndAddress();
const size_t cur_size = cur_end - cur_start;
/* Fix the permissions, if we need to. */
if ((info.GetPermission() & KMemoryPermission_IpcLockChangeMask) != src_perm) {
const KPageProperties properties = { info.GetPermission(), false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(page_list, cur_start, cur_size / PageSize, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, true));
}
/* If the block is at the end, we're done. */
if (mapped_last <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
MESOSPHERE_ABORT_UNLESS(it != this->memory_block_manager.end());
}
}
};
/* Iterate, mapping as needed. */
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(aligned_src_start);
while (true) {
const KMemoryInfo info = it->GetMemoryInfo();
/* Validate the current block. */
R_TRY(this->CheckMemoryState(info, test_state, test_state, test_perm, test_perm, test_attr_mask, KMemoryAttribute_None));
if (mapping_src_start < mapping_src_end && GetInteger(mapping_src_start) < info.GetEndAddress() && info.GetAddress() < GetInteger(mapping_src_end)) {
const auto cur_start = info.GetAddress() >= GetInteger(mapping_src_start) ? info.GetAddress() : GetInteger(mapping_src_start);
const auto cur_end = mapping_src_last <= info.GetLastAddress() ? GetInteger(mapping_src_end) : info.GetEndAddress();
const size_t cur_size = cur_end - cur_start;
/* Set the permissions on the block, if we need to. */
if ((info.GetPermission() & KMemoryPermission_IpcLockChangeMask) != src_perm) {
const KPageProperties properties = { src_perm, false, false, false };
R_TRY(this->Operate(page_list, cur_start, cur_size / PageSize, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
}
/* Note that we mapped this part. */
mapped_size += cur_size;
}
/* If the block is at the end, we're done. */
if (aligned_src_last <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
MESOSPHERE_ABORT_UNLESS(it != this->memory_block_manager.end());
}
/* We succeeded, so no need to unmap. */
unmap_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::SetupForIpcServer(KProcessAddress *out_addr, size_t size, KProcessAddress src_addr, KMemoryPermission test_perm, KMemoryState dst_state, KPageTableBase &src_page_table, bool send) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
MESOSPHERE_ASSERT(src_page_table.IsLockedByCurrentThread());
/* Check that we can theoretically map. */
const KProcessAddress region_start = this->alias_region_start;
const size_t region_size = this->alias_region_end - this->alias_region_start;
R_UNLESS(size < region_size, svc::ResultOutOfAddressSpace());
/* Get aligned source extents. */
const KProcessAddress src_start = src_addr;
const KProcessAddress src_end = src_addr + size;
const KProcessAddress aligned_src_start = util::AlignDown(GetInteger(src_start), PageSize);
const KProcessAddress aligned_src_end = util::AlignUp(GetInteger(src_start) + size, PageSize);
const KProcessAddress mapping_src_start = util::AlignUp(GetInteger(src_start), PageSize);
const KProcessAddress mapping_src_end = util::AlignDown(GetInteger(src_start) + size, PageSize);
const size_t aligned_src_size = aligned_src_end - aligned_src_start;
const size_t mapping_src_size = (mapping_src_start < mapping_src_end) ? (mapping_src_end - mapping_src_start) : 0;
/* Select a random address to map at. */
KProcessAddress dst_addr = Null<KProcessAddress>;
for (s32 block_type = KPageTable::GetMaxBlockType(); block_type >= 0; block_type--) {
const size_t alignment = KPageTable::GetBlockSize(static_cast<KPageTable::BlockType>(block_type));
const size_t offset = GetInteger(aligned_src_start) & (alignment - 1);
dst_addr = this->FindFreeArea(region_start, region_size / PageSize, aligned_src_size / PageSize, alignment, offset, this->GetNumGuardPages());
if (dst_addr != Null<KProcessAddress>) {
break;
}
}
R_UNLESS(dst_addr != Null<KProcessAddress>, svc::ResultOutOfAddressSpace());
/* Check that we can perform the operation we're about to perform. */
MESOSPHERE_ASSERT(this->CanContain(dst_addr, aligned_src_size, dst_state));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Reserve space for any partial pages we allocate. */
const size_t unmapped_size = aligned_src_size - mapping_src_size;
KScopedResourceReservation memory_reservation(GetCurrentProcess().GetResourceLimit(), ams::svc::LimitableResource_PhysicalMemoryMax, unmapped_size);
R_UNLESS(memory_reservation.Succeeded(), svc::ResultLimitReached());
/* Ensure that we we clean up on failure. */
KVirtualAddress start_partial_page = Null<KVirtualAddress>;
KVirtualAddress end_partial_page = Null<KVirtualAddress>;
KProcessAddress cur_mapped_addr = dst_addr;
auto cleanup_guard = SCOPE_GUARD {
if (start_partial_page != Null<KVirtualAddress>) {
Kernel::GetMemoryManager().Open(start_partial_page, 1);
Kernel::GetMemoryManager().Close(start_partial_page, 1);
}
if (end_partial_page != Null<KVirtualAddress>) {
Kernel::GetMemoryManager().Open(end_partial_page, 1);
Kernel::GetMemoryManager().Close(end_partial_page, 1);
}
if (cur_mapped_addr != dst_addr) {
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), dst_addr, (cur_mapped_addr - dst_addr) / PageSize, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, true));
}
};
/* Allocate the start page as needed. */
if (aligned_src_start < mapping_src_start) {
start_partial_page = Kernel::GetMemoryManager().AllocateContinuous(1, 0, this->allocate_option);
R_UNLESS(start_partial_page != Null<KVirtualAddress>, svc::ResultOutOfMemory());
}
/* Allocate the end page as needed. */
if (mapping_src_end < aligned_src_end && (aligned_src_start < mapping_src_end || aligned_src_start == mapping_src_start)) {
end_partial_page = Kernel::GetMemoryManager().AllocateContinuous(1, 0, this->allocate_option);
R_UNLESS(end_partial_page != Null<KVirtualAddress>, svc::ResultOutOfMemory());
}
/* Get the implementation. */
auto &src_impl = src_page_table.GetImpl();
/* Get the page properties for any mapping we'll be doing. */
const KPageProperties dst_map_properties = { test_perm, false, false, false };
/* Get the fill value for partial pages. */
const auto fill_val = this->ipc_fill_value;
/* Begin traversal. */
TraversalContext context;
TraversalEntry next_entry;
bool traverse_valid = src_impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), aligned_src_start);
MESOSPHERE_ASSERT(traverse_valid);
/* Prepare tracking variables. */
KPhysicalAddress cur_block_addr = next_entry.phys_addr;
size_t cur_block_size = next_entry.block_size - (GetInteger(cur_block_addr) & (next_entry.block_size - 1));
size_t tot_block_size = cur_block_size;
/* Map the start page, if we have one. */
if (start_partial_page != Null<KVirtualAddress>) {
/* Ensure the page holds correct data. */
if (send) {
const size_t partial_offset = src_start - aligned_src_start;
size_t copy_size, clear_size;
if (src_end < mapping_src_start) {
copy_size = size;
clear_size = mapping_src_start - src_end;
} else {
copy_size = mapping_src_start - src_start;
clear_size = 0;
}
std::memset(GetVoidPointer(start_partial_page), fill_val, partial_offset);
std::memcpy(GetVoidPointer(start_partial_page + partial_offset), GetVoidPointer(GetHeapVirtualAddress(cur_block_addr) + partial_offset), copy_size);
if (clear_size > 0) {
std::memset(GetVoidPointer(start_partial_page + partial_offset + copy_size), fill_val, clear_size);
}
} else {
std::memset(GetVoidPointer(start_partial_page), fill_val, PageSize);
}
/* Map the page. */
R_TRY(this->Operate(updater.GetPageList(), cur_mapped_addr, 1, GetHeapPhysicalAddress(start_partial_page), true, dst_map_properties, OperationType_Map, false));
/* Update tracking extents. */
cur_mapped_addr += PageSize;
cur_block_addr += PageSize;
cur_block_size -= PageSize;
/* If the block's size was one page, we may need to continue traversal. */
if (cur_block_size == 0 && aligned_src_size > PageSize) {
traverse_valid = src_impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
cur_block_addr = next_entry.phys_addr;
cur_block_size = next_entry.block_size;
tot_block_size += next_entry.block_size;
}
}
/* Map the remaining pages. */
while (aligned_src_start + tot_block_size < mapping_src_end) {
/* Continue the traversal. */
traverse_valid = src_impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
/* Process the block. */
if (next_entry.phys_addr != cur_block_addr + cur_block_size) {
/* Map the block we've been processing so far. */
R_TRY(this->Operate(updater.GetPageList(), cur_mapped_addr, cur_block_size / PageSize, cur_block_addr, true, dst_map_properties, OperationType_Map, false));
/* Update tracking extents. */
cur_mapped_addr += cur_block_size;
cur_block_addr = next_entry.phys_addr;
cur_block_size = next_entry.block_size;
} else {
cur_block_size += next_entry.block_size;
}
tot_block_size += next_entry.block_size;
}
/* Handle the last direct-mapped page. */
if (const KProcessAddress mapped_block_end = aligned_src_start + tot_block_size - cur_block_size; mapped_block_end < mapping_src_end) {
const size_t last_block_size = mapping_src_end - mapped_block_end;
/* Map the last block. */
R_TRY(this->Operate(updater.GetPageList(), cur_mapped_addr, last_block_size / PageSize, cur_block_addr, true, dst_map_properties, OperationType_Map, false));
/* Update tracking extents. */
cur_mapped_addr += last_block_size;
cur_block_addr += last_block_size;
if (mapped_block_end + cur_block_size < aligned_src_end && cur_block_size == last_block_size) {
traverse_valid = src_impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
cur_block_addr = next_entry.phys_addr;
}
}
/* Map the end page, if we have one. */
if (end_partial_page != Null<KVirtualAddress>) {
/* Ensure the page holds correct data. */
if (send) {
const size_t copy_size = src_end - mapping_src_end;
std::memcpy(GetVoidPointer(end_partial_page), GetVoidPointer(GetHeapVirtualAddress(cur_block_addr)), copy_size);
std::memset(GetVoidPointer(end_partial_page + copy_size), fill_val, PageSize - copy_size);
} else {
std::memset(GetVoidPointer(end_partial_page), fill_val, PageSize);
}
/* Map the page. */
R_TRY(this->Operate(updater.GetPageList(), cur_mapped_addr, 1, GetHeapPhysicalAddress(end_partial_page), true, dst_map_properties, OperationType_Map, false));
}
/* Update memory blocks to reflect our changes */
this->memory_block_manager.Update(std::addressof(allocator), dst_addr, aligned_src_size / PageSize, dst_state, test_perm, KMemoryAttribute_None);
/* Set the output address. */
*out_addr = dst_addr + (src_start - aligned_src_start);
/* We succeeded. */
cleanup_guard.Cancel();
memory_reservation.Commit();
return ResultSuccess();
}
Result KPageTableBase::SetupForIpc(KProcessAddress *out_dst_addr, size_t size, KProcessAddress src_addr, KPageTableBase &src_page_table, KMemoryPermission test_perm, KMemoryState dst_state, bool send) {
/* For convenience, alias this. */
KPageTableBase &dst_page_table = *this;
/* Get the table locks. */
KLightLock &lock_0 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? src_page_table.general_lock : dst_page_table.general_lock;
KLightLock &lock_1 = (reinterpret_cast<uintptr_t>(std::addressof(src_page_table)) <= reinterpret_cast<uintptr_t>(std::addressof(dst_page_table))) ? dst_page_table.general_lock : src_page_table.general_lock;
/* Lock the first lock. */
KScopedLightLock lk0(lock_0);
/* If necessary, lock the second lock. */
std::optional<KScopedLightLock> lk1;
if (std::addressof(lock_0) != std::addressof(lock_1)) {
lk1.emplace(lock_1);
}
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(src_page_table.memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(std::addressof(src_page_table));
/* Perform client setup. */
R_TRY(src_page_table.SetupForIpcClient(updater.GetPageList(), src_addr, size, test_perm, dst_state));
/* Ensure that we clean up appropriately if we fail after this. */
auto cleanup_guard = SCOPE_GUARD { MESOSPHERE_R_ABORT_UNLESS(src_page_table.CleanupForIpcClientOnServerSetupFailure(updater.GetPageList(), src_addr, size, test_perm)); };
/* Perform server setup. */
R_TRY(dst_page_table.SetupForIpcServer(out_dst_addr, size, src_addr, test_perm, dst_state, src_page_table, send));
/* Get the mapped extents. */
const KProcessAddress src_map_start = util::AlignUp(GetInteger(src_addr), PageSize);
const KProcessAddress src_map_end = util::AlignDown(GetInteger(src_addr) + size, PageSize);
/* If anything was mapped, ipc-lock the pages. */
if (src_map_start < src_map_end) {
/* Get the source permission. */
const auto src_perm = static_cast<KMemoryPermission>((test_perm == KMemoryPermission_UserReadWrite) ? KMemoryPermission_KernelReadWrite | KMemoryPermission_NotMapped : KMemoryPermission_UserRead);
src_page_table.memory_block_manager.UpdateLock(std::addressof(allocator), src_map_start, (src_map_end - src_map_start) / PageSize, &KMemoryBlock::LockForIpc, src_perm);
}
/* We succeeded, so cancel our cleanup guard. */
cleanup_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::CleanupForIpcServer(KProcessAddress address, size_t size, KMemoryState dst_state, KProcess *server_process) {
/* Validate the address. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Validate the memory state. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, dst_state, KMemoryPermission_UserRead, KMemoryPermission_UserRead, KMemoryAttribute_All, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Get aligned extents. */
const KProcessAddress aligned_start = util::AlignDown(GetInteger(address), PageSize);
const KProcessAddress aligned_end = util::AlignUp(GetInteger(address) + size, PageSize);
const size_t aligned_size = aligned_end - aligned_start;
const size_t aligned_num_pages = aligned_size / PageSize;
/* Unmap the pages. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), aligned_start, aligned_num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Update memory blocks. */
this->memory_block_manager.Update(std::addressof(allocator), aligned_start, aligned_num_pages, KMemoryState_None, KMemoryPermission_None, KMemoryAttribute_None);
/* Release from the resource limit as relevant. */
if (auto *resource_limit = server_process->GetResourceLimit(); resource_limit != nullptr) {
const KProcessAddress mapping_start = util::AlignUp(GetInteger(address), PageSize);
const KProcessAddress mapping_end = util::AlignDown(GetInteger(address) + size, PageSize);
const size_t mapping_size = (mapping_start < mapping_end) ? mapping_end - mapping_start : 0;
resource_limit->Release(ams::svc::LimitableResource_PhysicalMemoryMax, aligned_size - mapping_size);
}
return ResultSuccess();
}
Result KPageTableBase::CleanupForIpcClient(KProcessAddress address, size_t size, KMemoryState dst_state) {
/* Validate the address. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Get aligned source extents. */
const KProcessAddress mapping_start = util::AlignUp(GetInteger(address), PageSize);
const KProcessAddress mapping_end = util::AlignDown(GetInteger(address) + size, PageSize);
const KProcessAddress mapping_last = mapping_end - 1;
const size_t mapping_size = (mapping_start < mapping_end) ? (mapping_end - mapping_start) : 0;
/* If nothing was mapped, we're actually done immediately. */
R_SUCCEED_IF(mapping_size == 0);
/* Get the test state and attribute mask. */
u32 test_state;
u32 test_attr_mask;
switch (dst_state) {
case KMemoryState_Ipc:
test_state = KMemoryState_FlagCanUseIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_DeviceShared | KMemoryAttribute_Locked;
break;
case KMemoryState_NonSecureIpc:
test_state = KMemoryState_FlagCanUseNonSecureIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
case KMemoryState_NonDeviceIpc:
test_state = KMemoryState_FlagCanUseNonDeviceIpc;
test_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
default:
return svc::ResultInvalidCombination();
}
/* Lock the table. */
/* NOTE: Nintendo does this *after* creating the updater below, but this does not follow convention elsewhere in KPageTableBase. */
KScopedLightLock lk(this->general_lock);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Ensure that on failure, we roll back appropriately. */
size_t mapped_size = 0;
auto unmap_guard = SCOPE_GUARD {
if (mapped_size > 0) {
/* Determine where the mapping ends. */
const auto mapped_end = GetInteger(mapping_start) + mapped_size;
const auto mapped_last = mapped_end - 1;
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(mapping_start);
while (true) {
const KMemoryInfo info = it->GetMemoryInfo();
const auto cur_start = info.GetAddress() >= GetInteger(mapping_start) ? info.GetAddress() : GetInteger(mapping_start);
const auto cur_end = mapped_last <= info.GetLastAddress() ? mapped_end : info.GetEndAddress();
const size_t cur_size = cur_end - cur_start;
/* Fix the permissions, if we need to. */
if (info.GetIpcLockCount() == 1 && (info.GetPermission() != info.GetOriginalPermission())) {
const KPageProperties properties = { info.GetPermission(), false, false, false };
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), cur_start, cur_size / PageSize, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, true));
}
/* If the block is at the end, we're done. */
if (mapped_last <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
MESOSPHERE_ABORT_UNLESS(it != this->memory_block_manager.end());
}
}
};
/* Iterate, reprotecting as needed. */
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(mapping_start);
while (true) {
const KMemoryInfo info = it->GetMemoryInfo();
/* Validate the current block. */
R_TRY(this->CheckMemoryState(info, test_state, test_state, KMemoryPermission_None, KMemoryPermission_None, test_attr_mask | KMemoryAttribute_IpcLocked, KMemoryAttribute_IpcLocked));
const auto cur_start = info.GetAddress() >= GetInteger(mapping_start) ? info.GetAddress() : GetInteger(mapping_start);
const auto cur_end = mapping_last <= info.GetLastAddress() ? GetInteger(mapping_end) : info.GetEndAddress();
const size_t cur_size = cur_end - cur_start;
/* Set the permissions on the block, if we need to. */
if (info.GetIpcLockCount() == 1 && (info.GetPermission() != info.GetOriginalPermission())) {
const KPageProperties properties = { info.GetOriginalPermission(), false, false, false };
R_TRY(this->Operate(updater.GetPageList(), cur_start, cur_size / PageSize, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, false));
}
/* Mark that we mapped the block. */
mapped_size += cur_size;
/* If the block is at the end, we're done. */
if (mapping_last <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
MESOSPHERE_ABORT_UNLESS(it != this->memory_block_manager.end());
}
/* Unlock the pages. */
this->memory_block_manager.UpdateLock(std::addressof(allocator), mapping_start, mapping_size / PageSize, &KMemoryBlock::UnlockForIpc, KMemoryPermission_None);
/* We succeeded, so no need to unmap. */
unmap_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::CleanupForIpcClientOnServerSetupFailure(PageLinkedList *page_list, KProcessAddress address, size_t size, KMemoryPermission src_perm) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Get the mapped extents. */
const KProcessAddress src_map_start = util::AlignUp(GetInteger(address), PageSize);
const KProcessAddress src_map_end = util::AlignDown(GetInteger(address) + size, PageSize);
const KProcessAddress src_map_last = src_map_end - 1;
/* If nothing was reprotected, there's no cleanup to do. */
R_SUCCEED_IF(src_map_start >= src_map_end);
/* Get the permission to check against. */
const auto prot_perm = (src_perm == KMemoryPermission_UserReadWrite ? KMemoryPermission_KernelReadWrite | KMemoryPermission_NotMapped : KMemoryPermission_UserRead);
/* Iterate over blocks, fixing permissions. */
KMemoryBlockManager::const_iterator it = this->memory_block_manager.FindIterator(address);
while (true) {
const KMemoryInfo info = it->GetMemoryInfo();
const auto cur_start = info.GetAddress() >= GetInteger(src_map_start) ? info.GetAddress() : GetInteger(src_map_start);
const auto cur_end = src_map_last <= info.GetLastAddress() ? src_map_end : info.GetEndAddress();
/* If we can, fix the protections on the block. */
if (info.GetIpcLockCount() == 0 && (info.GetPermission() & KMemoryPermission_IpcLockChangeMask) != prot_perm) {
const KPageProperties properties = { src_perm, false, false, false };
R_TRY(this->Operate(page_list, cur_start, (cur_end - cur_start) / PageSize, Null<KPhysicalAddress>, false, properties, OperationType_ChangePermissions, true));
}
/* If we're past the end of the region, we're done. */
if (src_map_last <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
MESOSPHERE_ABORT_UNLESS(it != this->memory_block_manager.end());
}
return ResultSuccess();
}
Result KPageTableBase::MapPhysicalMemory(KProcessAddress address, size_t size) {
/* Lock the physical memory lock. */
KScopedLightLock phys_lk(this->map_physical_memory_lock);
/* Calculate the last address for convenience. */
const KProcessAddress last_address = address + size - 1;
/* Define iteration variables. */
KProcessAddress cur_address;
size_t mapped_size;
/* The entire mapping process can be retried. */
while (true) {
/* Check if the memory is already mapped. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Iterate over the memory. */
cur_address = address;
mapped_size = 0;
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
if (info.GetState() != KMemoryState_Free) {
mapped_size += (last_address + 1 - cur_address);
}
break;
}
/* Track the memory if it's mapped. */
if (info.GetState() != KMemoryState_Free) {
mapped_size += KProcessAddress(info.GetEndAddress()) - cur_address;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
/* If the size mapped is the size requested, we've nothing to do. */
R_SUCCEED_IF(size == mapped_size);
}
/* Allocate and map the memory. */
{
/* Reserve the memory from the process resource limit. */
KScopedResourceReservation memory_reservation(GetCurrentProcess().GetResourceLimit(), ams::svc::LimitableResource_PhysicalMemoryMax, size - mapped_size);
R_UNLESS(memory_reservation.Succeeded(), svc::ResultLimitReached());
/* Allocate pages for the new memory. */
KPageGroup pg(this->block_info_manager);
R_TRY(Kernel::GetMemoryManager().AllocateForProcess(std::addressof(pg), (size - mapped_size) / PageSize, this->allocate_option, GetCurrentProcess().GetId(), this->heap_fill_value));
/* Open a reference to the pages we allocated, and close our reference when we're done. */
pg.Open();
ON_SCOPE_EXIT { pg.Close(); };
/* Map the memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Verify that nobody has mapped memory since we first checked. */
{
/* Iterate over the memory. */
size_t checked_mapped_size = 0;
cur_address = address;
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
if (info.GetState() != KMemoryState_Free) {
checked_mapped_size += (last_address + 1 - cur_address);
}
break;
}
/* Track the memory if it's mapped. */
if (info.GetState() != KMemoryState_Free) {
checked_mapped_size += KProcessAddress(info.GetEndAddress()) - cur_address;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
/* If the size now isn't what it was before, somebody mapped or unmapped concurrently. */
/* If this happened, retry. */
if (mapped_size != checked_mapped_size) {
continue;
}
}
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Reset the current tracking address, and make sure we clean up on failure. */
cur_address = address;
auto unmap_guard = SCOPE_GUARD {
if (cur_address > address) {
const KProcessAddress last_unmap_address = cur_address - 1;
/* Iterate, unmapping the pages. */
cur_address = address;
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* If the memory state is free, we mapped it and need to unmap it. */
if (info.GetState() == KMemoryState_Free) {
/* Determine the range to unmap. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
const size_t cur_pages = std::min(KProcessAddress(info.GetEndAddress()) - cur_address, last_unmap_address + 1 - cur_address) / PageSize;
/* Unmap. */
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), cur_address, cur_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, true));
}
/* Check if we're done. */
if (last_unmap_address <= info.GetLastAddress()) {
break;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
}
};
/* Iterate over the memory. */
auto pg_it = pg.begin();
KPhysicalAddress pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
size_t pg_pages = pg_it->GetNumPages();
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* If it's unmapped, we need to map it. */
if (info.GetState() == KMemoryState_Free) {
/* Determine the range to map. */
const KPageProperties map_properties = { KMemoryPermission_UserReadWrite, false, false, false };
size_t map_pages = std::min(KProcessAddress(info.GetEndAddress()) - cur_address, last_address + 1 - cur_address) / PageSize;
/* While we have pages to map, map them. */
while (map_pages > 0) {
/* Check if we're at the end of the physical block. */
if (pg_pages == 0) {
/* Ensure there are more pages to map. */
MESOSPHERE_ASSERT(pg_it != pg.end());
/* Advance our physical block. */
++pg_it;
pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
pg_pages = pg_it->GetNumPages();
}
/* Map whatever we can. */
const size_t cur_pages = std::min(pg_pages, map_pages);
R_TRY(this->Operate(updater.GetPageList(), cur_address, cur_pages, pg_phys_addr, true, map_properties, OperationType_Map, false));
/* Advance. */
cur_address += cur_pages * PageSize;
map_pages -= cur_pages;
pg_phys_addr += cur_pages * PageSize;
pg_pages -= cur_pages;
}
}
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
break;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
/* We succeeded, so commit the memory reservation. */
memory_reservation.Commit();
/* Increase our tracked mapped size. */
this->mapped_physical_memory_size += (size - mapped_size);
/* Update the relevant memory blocks. */
this->memory_block_manager.UpdateIfMatch(std::addressof(allocator), address, size / PageSize,
KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None,
KMemoryState_Normal, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
/* Cancel our guard. */
unmap_guard.Cancel();
return ResultSuccess();
}
}
}
}
Result KPageTableBase::UnmapPhysicalMemory(KProcessAddress address, size_t size) {
/* Lock the physical memory lock. */
KScopedLightLock phys_lk(this->map_physical_memory_lock);
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Calculate the last address for convenience. */
const KProcessAddress last_address = address + size - 1;
/* Define iteration variables. */
KProcessAddress cur_address;
size_t mapped_size;
/* Check if the memory is mapped. */
{
/* Iterate over the memory. */
cur_address = address;
mapped_size = 0;
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* Verify the memory's state. */
const bool is_normal = info.GetState() == KMemoryState_Normal && info.GetAttribute() == 0;
const bool is_free = info.GetState() == KMemoryState_Free;
R_UNLESS(is_normal || is_free, svc::ResultInvalidCurrentMemory());
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
if (is_normal) {
mapped_size += (last_address + 1 - cur_address);
}
break;
}
/* Track the memory if it's mapped. */
if (is_normal) {
mapped_size += KProcessAddress(info.GetEndAddress()) - cur_address;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
/* If there's nothing mapped, we've nothing to do. */
R_SUCCEED_IF(mapped_size == 0);
}
/* Make a page group for the unmap region. */
KPageGroup pg(this->block_info_manager);
{
auto &impl = this->GetImpl();
/* Begin traversal. */
TraversalContext context;
TraversalEntry cur_entry = {};
bool cur_valid = false;
TraversalEntry next_entry;
bool next_valid;
size_t tot_size = 0;
cur_address = address;
next_valid = impl.BeginTraversal(std::addressof(next_entry), std::addressof(context), cur_address);
next_entry.block_size = (next_entry.block_size - (GetInteger(next_entry.phys_addr) & (next_entry.block_size - 1)));
/* Iterate, building the group. */
while (true) {
if ((!next_valid && !cur_valid) || (next_valid && cur_valid && next_entry.phys_addr == cur_entry.phys_addr + cur_entry.block_size)) {
cur_entry.block_size += next_entry.block_size;
} else {
if (cur_valid) {
MESOSPHERE_ABORT_UNLESS(IsHeapPhysicalAddress(cur_entry.phys_addr));
R_TRY(pg.AddBlock(GetHeapVirtualAddress(cur_entry.phys_addr), cur_entry.block_size / PageSize));
}
/* Update tracking variables. */
tot_size += cur_entry.block_size;
cur_entry = next_entry;
cur_valid = next_valid;
}
if (cur_entry.block_size + tot_size >= size) {
break;
}
next_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
}
/* Add the last block. */
if (cur_valid) {
MESOSPHERE_ABORT_UNLESS(IsHeapPhysicalAddress(cur_entry.phys_addr));
R_TRY(pg.AddBlock(GetHeapVirtualAddress(cur_entry.phys_addr), (size - tot_size) / PageSize));
}
}
MESOSPHERE_ASSERT(pg.GetNumPages() == mapped_size / PageSize);
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Open a reference to the pages, we're unmapping, and close the reference when we're done. */
pg.Open();
ON_SCOPE_EXIT { pg.Close(); };
/* Reset the current tracking address, and make sure we clean up on failure. */
cur_address = address;
auto remap_guard = SCOPE_GUARD {
if (cur_address > address) {
const KProcessAddress last_map_address = cur_address - 1;
cur_address = address;
/* Iterate over the memory we unmapped. */
auto it = this->memory_block_manager.FindIterator(cur_address);
auto pg_it = pg.begin();
KPhysicalAddress pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
size_t pg_pages = pg_it->GetNumPages();
while (true) {
/* Get the memory info for the pages we unmapped, convert to property. */
const KMemoryInfo info = it->GetMemoryInfo();
const KPageProperties prev_properties = { info.GetPermission(), false, false, false };
/* If the memory is normal, we unmapped it and need to re-map it. */
if (info.GetState() == KMemoryState_Normal) {
/* Determine the range to map. */
size_t map_pages = std::min(KProcessAddress(info.GetEndAddress()) - cur_address, last_map_address + 1 - cur_address) / PageSize;
/* While we have pages to map, map them. */
while (map_pages > 0) {
/* Check if we're at the end of the physical block. */
if (pg_pages == 0) {
/* Ensure there are more pages to map. */
MESOSPHERE_ABORT_UNLESS(pg_it != pg.end());
/* Advance our physical block. */
++pg_it;
pg_phys_addr = GetHeapPhysicalAddress(pg_it->GetAddress());
pg_pages = pg_it->GetNumPages();
}
/* Map whatever we can. */
const size_t cur_pages = std::min(pg_pages, map_pages);
MESOSPHERE_R_ABORT_UNLESS(this->Operate(updater.GetPageList(), cur_address, cur_pages, pg_phys_addr, true, prev_properties, OperationType_Map, true));
/* Advance. */
cur_address += cur_pages * PageSize;
map_pages -= cur_pages;
pg_phys_addr += cur_pages * PageSize;
pg_pages -= cur_pages;
}
}
/* Check if we're done. */
if (last_map_address <= info.GetLastAddress()) {
break;
}
/* Advance. */
++it;
}
}
};
/* Iterate over the memory, unmapping as we go. */
auto it = this->memory_block_manager.FindIterator(cur_address);
while (true) {
/* Check that the iterator is valid. */
MESOSPHERE_ASSERT(it != this->memory_block_manager.end());
/* Get the memory info. */
const KMemoryInfo info = it->GetMemoryInfo();
/* If the memory state is normal, we need to unmap it. */
if (info.GetState() == KMemoryState_Normal) {
/* Determine the range to unmap. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
const size_t cur_pages = std::min(KProcessAddress(info.GetEndAddress()) - cur_address, last_address + 1 - cur_address) / PageSize;
/* Unmap. */
R_TRY(this->Operate(updater.GetPageList(), cur_address, cur_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
}
/* Check if we're done. */
if (last_address <= info.GetLastAddress()) {
break;
}
/* Advance. */
cur_address = info.GetEndAddress();
++it;
}
/* Release the memory resource. */
this->mapped_physical_memory_size -= mapped_size;
GetCurrentProcess().ReleaseResource(ams::svc::LimitableResource_PhysicalMemoryMax, mapped_size);
/* Update memory blocks. */
this->memory_block_manager.Update(std::addressof(allocator), address, size / PageSize, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
/* We succeeded. */
remap_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::MapPhysicalMemoryUnsafe(KProcessAddress address, size_t size) {
/* Try to reserve the unsafe memory. */
R_UNLESS(Kernel::GetUnsafeMemory().TryReserve(size), svc::ResultLimitReached());
/* Ensure we release our reservation on failure. */
auto reserve_guard = SCOPE_GUARD { Kernel::GetUnsafeMemory().Release(size); };
/* Create a page group for the new memory. */
KPageGroup pg(this->block_info_manager);
/* Allocate the new memory. */
const size_t num_pages = size / PageSize;
R_TRY(Kernel::GetMemoryManager().Allocate(std::addressof(pg), num_pages, KMemoryManager::EncodeOption(KMemoryManager::Pool_Unsafe, KMemoryManager::Direction_FromFront)));
/* Open the page group, and close it when we're done with it. */
pg.Open();
ON_SCOPE_EXIT { pg.Close(); };
/* Clear the new memory. */
for (const auto &block : pg) {
std::memset(GetVoidPointer(block.GetAddress()), this->heap_fill_value, block.GetSize());
}
/* Map the new memory. */
{
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Map the pages. */
const KPageProperties map_properties = { KMemoryPermission_UserReadWrite, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), address, num_pages, pg, map_properties, OperationType_MapGroup, false));
/* Apply the memory block update. */
this->memory_block_manager.Update(std::addressof(allocator), address, num_pages, KMemoryState_Normal, KMemoryPermission_UserReadWrite, KMemoryAttribute_None);
/* Update our mapped unsafe size. */
this->mapped_unsafe_physical_memory += size;
/* We succeeded. */
reserve_guard.Cancel();
return ResultSuccess();
}
}
Result KPageTableBase::UnmapPhysicalMemoryUnsafe(KProcessAddress address, size_t size) {
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check whether we can unmap this much unsafe physical memory. */
R_UNLESS(size <= this->mapped_unsafe_physical_memory, svc::ResultInvalidCurrentMemory());
/* Check the memory state. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, KMemoryState_Normal, KMemoryPermission_All, KMemoryPermission_UserReadWrite, KMemoryAttribute_All, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Unmap the memory. */
const size_t num_pages = size / PageSize;
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), address, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Apply the memory block update. */
this->memory_block_manager.Update(std::addressof(allocator), address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
/* Release the unsafe memory from the limit. */
Kernel::GetUnsafeMemory().Release(size);
/* Update our mapped unsafe size. */
this->mapped_unsafe_physical_memory -= size;
return ResultSuccess();
}
}
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