diff options
| -rw-r--r-- | src/core/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | src/core/hle/kernel/memory/page_table.cpp | 1234 | ||||
| -rw-r--r-- | src/core/hle/kernel/memory/page_table.h | 274 |
3 files changed, 1510 insertions, 0 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt index b0a010846..4ca68a309 100644 --- a/src/core/CMakeLists.txt +++ b/src/core/CMakeLists.txt @@ -166,6 +166,8 @@ add_library(core STATIC hle/kernel/memory/page_linked_list.h hle/kernel/memory/page_heap.cpp hle/kernel/memory/page_heap.h + hle/kernel/memory/page_table.cpp + hle/kernel/memory/page_table.h hle/kernel/memory/slab_heap.h hle/kernel/memory/system_control.cpp hle/kernel/memory/system_control.h diff --git a/src/core/hle/kernel/memory/page_table.cpp b/src/core/hle/kernel/memory/page_table.cpp new file mode 100644 index 000000000..01f9e99eb --- /dev/null +++ b/src/core/hle/kernel/memory/page_table.cpp @@ -0,0 +1,1234 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/alignment.h" +#include "common/assert.h" +#include "common/scope_exit.h" +#include "core/core.h" +#include "core/device_memory.h" +#include "core/hle/kernel/errors.h" +#include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/memory/address_space_info.h" +#include "core/hle/kernel/memory/memory_block.h" +#include "core/hle/kernel/memory/memory_block_manager.h" +#include "core/hle/kernel/memory/page_linked_list.h" +#include "core/hle/kernel/memory/page_table.h" +#include "core/hle/kernel/memory/system_control.h" +#include "core/hle/kernel/process.h" +#include "core/hle/kernel/resource_limit.h" +#include "core/memory.h" + +namespace Kernel::Memory { + +namespace { + +constexpr std::size_t GetAddressSpaceWidthFromType(FileSys::ProgramAddressSpaceType as_type) { + switch (as_type) { + case FileSys::ProgramAddressSpaceType::Is32Bit: + case FileSys::ProgramAddressSpaceType::Is32BitNoMap: + return 32; + case FileSys::ProgramAddressSpaceType::Is36Bit: + return 36; + case FileSys::ProgramAddressSpaceType::Is39Bit: + return 39; + default: + UNREACHABLE(); + return {}; + } +} + +constexpr u64 GetAddressInRange(const MemoryInfo& info, VAddr addr) { + if (info.GetAddress() < addr) { + return addr; + } + return info.GetAddress(); +} + +constexpr std::size_t GetSizeInRange(const MemoryInfo& info, VAddr start, VAddr end) { + std::size_t size{info.GetSize()}; + if (info.GetAddress() < start) { + size -= start - info.GetAddress(); + } + if (info.GetEndAddress() > end) { + size -= info.GetEndAddress() - end; + } + return size; +} + +} // namespace + +PageTable::PageTable(Core::System& system) : system{system} {} + +ResultCode PageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_type, + bool enable_aslr, VAddr code_addr, std::size_t code_size, + Memory::MemoryManager::Pool pool) { + + const auto GetSpaceStart = [&](AddressSpaceInfo::Type type) { + return AddressSpaceInfo::GetAddressSpaceStart(address_space_width, type); + }; + const auto GetSpaceSize = [&](AddressSpaceInfo::Type type) { + return AddressSpaceInfo::GetAddressSpaceSize(address_space_width, type); + }; + + // Set our width and heap/alias sizes + address_space_width = GetAddressSpaceWidthFromType(as_type); + const VAddr start = 0; + const VAddr end{1ULL << address_space_width}; + std::size_t alias_region_size{GetSpaceSize(AddressSpaceInfo::Type::Alias)}; + std::size_t heap_region_size{GetSpaceSize(AddressSpaceInfo::Type::Heap)}; + + ASSERT(start <= code_addr); + ASSERT(code_addr < code_addr + code_size); + ASSERT(code_addr + code_size - 1 <= end - 1); + + // Adjust heap/alias size if we don't have an alias region + if (as_type == FileSys::ProgramAddressSpaceType::Is32BitNoMap) { + heap_region_size += alias_region_size; + alias_region_size = 0; + } + + // Set code regions and determine remaining + constexpr std::size_t RegionAlignment{2 * 1024 * 1024}; + VAddr process_code_start{}; + VAddr process_code_end{}; + std::size_t stack_region_size{}; + std::size_t kernel_map_region_size{}; + + if (address_space_width == 39) { + alias_region_size = GetSpaceSize(AddressSpaceInfo::Type::Alias); + heap_region_size = GetSpaceSize(AddressSpaceInfo::Type::Heap); + stack_region_size = GetSpaceSize(AddressSpaceInfo::Type::Stack); + kernel_map_region_size = GetSpaceSize(AddressSpaceInfo::Type::Is32Bit); + code_region_start = GetSpaceStart(AddressSpaceInfo::Type::Large64Bit); + code_region_end = code_region_start + GetSpaceSize(AddressSpaceInfo::Type::Large64Bit); + alias_code_region_start = code_region_start; + alias_code_region_end = code_region_end; + process_code_start = Common::AlignDown(code_addr, RegionAlignment); + process_code_end = Common::AlignUp(code_addr + code_size, RegionAlignment); + } else { + stack_region_size = 0; + kernel_map_region_size = 0; + code_region_start = GetSpaceStart(AddressSpaceInfo::Type::Is32Bit); + code_region_end = code_region_start + GetSpaceSize(AddressSpaceInfo::Type::Is32Bit); + stack_region_start = code_region_start; + alias_code_region_start = code_region_start; + alias_code_region_end = GetSpaceStart(AddressSpaceInfo::Type::Small64Bit) + + GetSpaceSize(AddressSpaceInfo::Type::Small64Bit); + stack_region_end = code_region_end; + kernel_map_region_start = code_region_start; + kernel_map_region_end = code_region_end; + process_code_start = code_region_start; + process_code_end = code_region_end; + } + + // Set other basic fields + is_aslr_enabled = enable_aslr; + address_space_start = start; + address_space_end = end; + is_kernel = false; + + // Determine the region we can place our undetermineds in + VAddr alloc_start{}; + std::size_t alloc_size{}; + if ((process_code_start - code_region_start) >= (end - process_code_end)) { + alloc_start = code_region_start; + alloc_size = process_code_start - code_region_start; + } else { + alloc_start = process_code_end; + alloc_size = end - process_code_end; + } + const std::size_t needed_size{ + (alias_region_size + heap_region_size + stack_region_size + kernel_map_region_size)}; + if (alloc_size < needed_size) { + UNREACHABLE(); + return ERR_OUT_OF_MEMORY; + } + + const std::size_t remaining_size{alloc_size - needed_size}; + + // Determine random placements for each region + std::size_t alias_rnd{}, heap_rnd{}, stack_rnd{}, kmap_rnd{}; + if (enable_aslr) { + alias_rnd = SystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * + RegionAlignment; + heap_rnd = SystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * + RegionAlignment; + stack_rnd = SystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * + RegionAlignment; + kmap_rnd = SystemControl::GenerateRandomRange(0, remaining_size / RegionAlignment) * + RegionAlignment; + } + + // Setup heap and alias regions + alias_region_start = alloc_start + alias_rnd; + alias_region_end = alias_region_start + alias_region_size; + heap_region_start = alloc_start + heap_rnd; + heap_region_end = heap_region_start + heap_region_size; + + if (alias_rnd <= heap_rnd) { + heap_region_start += alias_region_size; + heap_region_end += alias_region_size; + } else { + alias_region_start += heap_region_size; + alias_region_end += heap_region_size; + } + + // Setup stack region + if (stack_region_size) { + stack_region_start = alloc_start + stack_rnd; + stack_region_end = stack_region_start + stack_region_size; + + if (alias_rnd < stack_rnd) { + stack_region_start += alias_region_size; + stack_region_end += alias_region_size; + } else { + alias_region_start += stack_region_size; + alias_region_end += stack_region_size; + } + + if (heap_rnd < stack_rnd) { + stack_region_start += heap_region_size; + stack_region_end += heap_region_size; + } else { + heap_region_start += stack_region_size; + heap_region_end += stack_region_size; + } + } + + // Setup kernel map region + if (kernel_map_region_size) { + kernel_map_region_start = alloc_start + kmap_rnd; + kernel_map_region_end = kernel_map_region_start + kernel_map_region_size; + + if (alias_rnd < kmap_rnd) { + kernel_map_region_start += alias_region_size; + kernel_map_region_end += alias_region_size; + } else { + alias_region_start += kernel_map_region_size; + alias_region_end += kernel_map_region_size; + } + + if (heap_rnd < kmap_rnd) { + kernel_map_region_start += heap_region_size; + kernel_map_region_end += heap_region_size; + } else { + heap_region_start += kernel_map_region_size; + heap_region_end += kernel_map_region_size; + } + + if (stack_region_size) { + if (stack_rnd < kmap_rnd) { + kernel_map_region_start += stack_region_size; + kernel_map_region_end += stack_region_size; + } else { + stack_region_start += kernel_map_region_size; + stack_region_end += kernel_map_region_size; + } + } + } + + // Set heap members + current_heap_end = heap_region_start; + max_heap_size = 0; + max_physical_memory_size = 0; + + // Ensure that we regions inside our address space + auto IsInAddressSpace = [&](VAddr addr) { + return address_space_start <= addr && addr <= address_space_end; + }; + ASSERT(IsInAddressSpace(alias_region_start)); + ASSERT(IsInAddressSpace(alias_region_end)); + ASSERT(IsInAddressSpace(heap_region_start)); + ASSERT(IsInAddressSpace(heap_region_end)); + ASSERT(IsInAddressSpace(stack_region_start)); + ASSERT(IsInAddressSpace(stack_region_end)); + ASSERT(IsInAddressSpace(kernel_map_region_start)); + ASSERT(IsInAddressSpace(kernel_map_region_end)); + + // Ensure that we selected regions that don't overlap + const VAddr alias_start{alias_region_start}; + const VAddr alias_last{alias_region_end - 1}; + const VAddr heap_start{heap_region_start}; + const VAddr heap_last{heap_region_end - 1}; + const VAddr stack_start{stack_region_start}; + const VAddr stack_last{stack_region_end - 1}; + const VAddr kmap_start{kernel_map_region_start}; + const VAddr kmap_last{kernel_map_region_end - 1}; + ASSERT(alias_last < heap_start || heap_last < alias_start); + ASSERT(alias_last < stack_start || stack_last < alias_start); + ASSERT(alias_last < kmap_start || kmap_last < alias_start); + ASSERT(heap_last < stack_start || stack_last < heap_start); + ASSERT(heap_last < kmap_start || kmap_last < heap_start); + + current_heap_addr = heap_region_start; + heap_capacity = 0; + physical_memory_usage = 0; + memory_pool = pool; + + page_table_impl.Resize(address_space_width, PageBits, true); + + return InitializeMemoryLayout(start, end); +} + +ResultCode PageTable::MapProcessCode(VAddr addr, std::size_t num_pages, MemoryState state, + MemoryPermission perm) { + std::lock_guard lock{page_table_lock}; + + const u64 size{num_pages * PageSize}; + + if (!CanContain(addr, size, state)) { + return ERR_INVALID_ADDRESS_STATE; + } + + if (IsRegionMapped(addr, size)) { + return ERR_INVALID_ADDRESS_STATE; + } + + PageLinkedList page_linked_list; + if (const ResultCode result{ + system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{ + Operate(addr, num_pages, page_linked_list, OperationType::MapGroup)}; + result.IsError()) { + return result; + } + + block_manager->Update(addr, num_pages, state, perm); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + const std::size_t num_pages{size / PageSize}; + + MemoryState state{}; + MemoryPermission perm{}; + if (const ResultCode result{CheckMemoryState( + &state, &perm, nullptr, src_addr, size, MemoryState::All, MemoryState::Normal, + MemoryPermission::Mask, MemoryPermission::ReadAndWrite, MemoryAttribute::Mask, + MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + if (IsRegionMapped(dst_addr, size)) { + return ERR_INVALID_ADDRESS_STATE; + } + + PageLinkedList page_linked_list; + AddRegionToPages(src_addr, num_pages, page_linked_list); + + { + auto block_guard = detail::ScopeExit( + [&] { Operate(src_addr, num_pages, perm, OperationType::ChangePermissions); }); + + if (const ResultCode result{Operate(src_addr, num_pages, MemoryPermission::None, + OperationType::ChangePermissions)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{MapPages(dst_addr, page_linked_list, MemoryPermission::None)}; + result.IsError()) { + return result; + } + + block_guard.Cancel(); + } + + block_manager->Update(src_addr, num_pages, state, MemoryPermission::None, + MemoryAttribute::Locked); + block_manager->Update(dst_addr, num_pages, MemoryState::AliasCode); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + if (!size) { + return RESULT_SUCCESS; + } + + const std::size_t num_pages{size / PageSize}; + + if (const ResultCode result{CheckMemoryState( + nullptr, nullptr, nullptr, src_addr, size, MemoryState::All, MemoryState::Normal, + MemoryPermission::None, MemoryPermission::None, MemoryAttribute::Mask, + MemoryAttribute::Locked, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + MemoryState state{}; + if (const ResultCode result{CheckMemoryState( + &state, nullptr, nullptr, dst_addr, PageSize, MemoryState::FlagCanCodeAlias, + MemoryState::FlagCanCodeAlias, MemoryPermission::None, MemoryPermission::None, + MemoryAttribute::Mask, MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{CheckMemoryState(dst_addr, size, MemoryState::All, state, + MemoryPermission::None, MemoryPermission::None, + MemoryAttribute::Mask, MemoryAttribute::None)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{ + Operate(dst_addr, num_pages, MemoryPermission::None, OperationType::Unmap)}; + result.IsError()) { + return result; + } + + block_manager->Update(dst_addr, num_pages, MemoryState::Free); + block_manager->Update(src_addr, num_pages, MemoryState::Normal, MemoryPermission::ReadAndWrite); + + return RESULT_SUCCESS; +} + +void PageTable::MapPhysicalMemory(PageLinkedList& page_linked_list, VAddr start, VAddr end) { + auto node{page_linked_list.Nodes().begin()}; + PAddr map_addr{node->GetAddress()}; + std::size_t src_num_pages{node->GetNumPages()}; + + block_manager->IterateForRange(start, end, [&](const MemoryInfo& info) { + if (info.state != MemoryState::Free) { + return; + } + + std::size_t dst_num_pages{GetSizeInRange(info, start, end) / PageSize}; + VAddr dst_addr{GetAddressInRange(info, start)}; + + while (dst_num_pages) { + if (!src_num_pages) { + node = std::next(node); + map_addr = node->GetAddress(); + src_num_pages = node->GetNumPages(); + } + + const std::size_t num_pages{std::min(src_num_pages, dst_num_pages)}; + Operate(dst_addr, num_pages, MemoryPermission::ReadAndWrite, OperationType::Map, + map_addr); + + dst_addr += num_pages * PageSize; + map_addr += num_pages * PageSize; + src_num_pages -= num_pages; + dst_num_pages -= num_pages; + } + }); +} + +ResultCode PageTable::MapPhysicalMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + std::size_t mapped_size{}; + const VAddr end_addr{addr + size}; + + block_manager->IterateForRange(addr, end_addr, [&](const MemoryInfo& info) { + if (info.state != MemoryState::Free) { + mapped_size += GetSizeInRange(info, addr, end_addr); + } + }); + + if (mapped_size == size) { + return RESULT_SUCCESS; + } + + auto process{system.Kernel().CurrentProcess()}; + const std::size_t remaining_size{size - mapped_size}; + const std::size_t remaining_pages{remaining_size / PageSize}; + + if (process->GetResourceLimit() && + !process->GetResourceLimit()->Reserve(ResourceType::PhysicalMemory, remaining_size)) { + return ERR_RESOURCE_LIMIT_EXCEEDED; + } + + PageLinkedList page_linked_list; + { + auto block_guard = detail::ScopeExit([&] { + system.Kernel().MemoryManager().Free(page_linked_list, remaining_pages, memory_pool); + process->GetResourceLimit()->Release(ResourceType::PhysicalMemory, remaining_size); + }); + + if (const ResultCode result{system.Kernel().MemoryManager().Allocate( + page_linked_list, remaining_pages, memory_pool)}; + result.IsError()) { + return result; + } + + block_guard.Cancel(); + } + + MapPhysicalMemory(page_linked_list, addr, end_addr); + + physical_memory_usage += remaining_size; + + const std::size_t num_pages{size / PageSize}; + block_manager->Update(addr, num_pages, MemoryState::Free, MemoryPermission::None, + MemoryAttribute::None, MemoryState::Normal, + MemoryPermission::ReadAndWrite, MemoryAttribute::None); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::UnmapPhysicalMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + const VAddr end_addr{addr + size}; + ResultCode result{RESULT_SUCCESS}; + std::size_t mapped_size{}; + + // Verify that the region can be unmapped + block_manager->IterateForRange(addr, end_addr, [&](const MemoryInfo& info) { + if (info.state == MemoryState::Normal) { + if (info.attribute != MemoryAttribute::None) { + result = ERR_INVALID_ADDRESS_STATE; + return; + } + mapped_size += GetSizeInRange(info, addr, end_addr); + } else if (info.state != MemoryState::Free) { + result = ERR_INVALID_ADDRESS_STATE; + } + }); + + if (result.IsError()) { + return result; + } + + if (!mapped_size) { + return RESULT_SUCCESS; + } + + if (const ResultCode result{UnmapMemory(addr, size)}; result.IsError()) { + return result; + } + + auto process{system.Kernel().CurrentProcess()}; + process->GetResourceLimit()->Release(ResourceType::PhysicalMemory, mapped_size); + physical_memory_usage -= mapped_size; + + return RESULT_SUCCESS; +} + +ResultCode PageTable::UnmapMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + const VAddr end_addr{addr + size}; + ResultCode result{RESULT_SUCCESS}; + PageLinkedList page_linked_list; + + // Unmap each region within the range + block_manager->IterateForRange(addr, end_addr, [&](const MemoryInfo& info) { + if (info.state == MemoryState::Normal) { + const std::size_t block_size{GetSizeInRange(info, addr, end_addr)}; + const std::size_t block_num_pages{block_size / PageSize}; + const VAddr block_addr{GetAddressInRange(info, addr)}; + + AddRegionToPages(block_addr, block_size / PageSize, page_linked_list); + + if (result = Operate(block_addr, block_num_pages, MemoryPermission::None, + OperationType::Unmap); + result.IsError()) { + return; + } + } + }); + + if (result.IsError()) { + return result; + } + + const std::size_t num_pages{size / PageSize}; + system.Kernel().MemoryManager().Free(page_linked_list, num_pages, memory_pool); + + block_manager->Update(addr, num_pages, MemoryState::Free); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::Map(VAddr dst_addr, VAddr src_addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + MemoryState src_state{}; + if (const ResultCode result{CheckMemoryState( + &src_state, nullptr, nullptr, src_addr, size, MemoryState::FlagCanAlias, + MemoryState::FlagCanAlias, MemoryPermission::Mask, MemoryPermission::ReadAndWrite, + MemoryAttribute::Mask, MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + if (IsRegionMapped(dst_addr, size)) { + return ERR_INVALID_ADDRESS_STATE; + } + + PageLinkedList page_linked_list; + const std::size_t num_pages{size / PageSize}; + + AddRegionToPages(src_addr, num_pages, page_linked_list); + + { + auto block_guard = detail::ScopeExit([&] { + Operate(src_addr, num_pages, MemoryPermission::ReadAndWrite, + OperationType::ChangePermissions); + }); + + if (const ResultCode result{Operate(src_addr, num_pages, MemoryPermission::None, + OperationType::ChangePermissions)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{ + MapPages(dst_addr, page_linked_list, MemoryPermission::ReadAndWrite)}; + result.IsError()) { + return result; + } + + block_guard.Cancel(); + } + + block_manager->Update(src_addr, num_pages, src_state, MemoryPermission::None, + MemoryAttribute::Locked); + block_manager->Update(dst_addr, num_pages, MemoryState::Stack, MemoryPermission::ReadAndWrite); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + MemoryState src_state{}; + if (const ResultCode result{CheckMemoryState( + &src_state, nullptr, nullptr, src_addr, size, MemoryState::FlagCanAlias, + MemoryState::FlagCanAlias, MemoryPermission::Mask, MemoryPermission::None, + MemoryAttribute::Mask, MemoryAttribute::Locked, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + MemoryPermission dst_perm{}; + if (const ResultCode result{CheckMemoryState( + nullptr, &dst_perm, nullptr, dst_addr, size, MemoryState::All, MemoryState::Stack, + MemoryPermission::None, MemoryPermission::None, MemoryAttribute::Mask, + MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + PageLinkedList src_pages; + PageLinkedList dst_pages; + const std::size_t num_pages{size / PageSize}; + + AddRegionToPages(src_addr, num_pages, src_pages); + AddRegionToPages(dst_addr, num_pages, dst_pages); + + if (!dst_pages.IsEqual(src_pages)) { + return ERR_INVALID_MEMORY_RANGE; + } + + { + auto block_guard = detail::ScopeExit([&] { MapPages(dst_addr, dst_pages, dst_perm); }); + + if (const ResultCode result{ + Operate(dst_addr, num_pages, MemoryPermission::None, OperationType::Unmap)}; + result.IsError()) { + return result; + } + + if (const ResultCode result{Operate(src_addr, num_pages, MemoryPermission::ReadAndWrite, + OperationType::ChangePermissions)}; + result.IsError()) { + return result; + } + + block_guard.Cancel(); + } + + block_manager->Update(src_addr, num_pages, src_state, MemoryPermission::ReadAndWrite); + block_manager->Update(dst_addr, num_pages, MemoryState::Free); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::MapPages(VAddr addr, const PageLinkedList& page_linked_list, + MemoryPermission perm) { + VAddr cur_addr{addr}; + + for (const auto& node : page_linked_list.Nodes()) { + if (const ResultCode result{ + Operate(cur_addr, node.GetNumPages(), perm, OperationType::Map, node.GetAddress())}; + result.IsError()) { + const MemoryInfo info{block_manager->FindBlock(cur_addr).GetMemoryInfo()}; + const std::size_t num_pages{(addr - cur_addr) / PageSize}; + + ASSERT( + Operate(addr, num_pages, MemoryPermission::None, OperationType::Unmap).IsSuccess()); + + return result; + } + + cur_addr += node.GetNumPages() * PageSize; + } + + return RESULT_SUCCESS; +} + +ResultCode PageTable::MapPages(VAddr addr, PageLinkedList& page_linked_list, MemoryState state, + MemoryPermission perm) { + std::lock_guard lock{page_table_lock}; + + const std::size_t num_pages{page_linked_list.GetNumPages()}; + const std::size_t size{num_pages * PageSize}; + + if (!CanContain(addr, size, state)) { + return ERR_INVALID_ADDRESS_STATE; + } + + if (IsRegionMapped(addr, num_pages * PageSize)) { + return ERR_INVALID_ADDRESS_STATE; + } + + if (const ResultCode result{MapPages(addr, page_linked_list, perm)}; result.IsError()) { + return result; + } + + block_manager->Update(addr, num_pages, state, perm); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::SetCodeMemoryPermission(VAddr addr, std::size_t size, MemoryPermission perm) { + + std::lock_guard lock{page_table_lock}; + + MemoryState prev_state{}; + MemoryPermission prev_perm{}; + + if (const ResultCode result{CheckMemoryState( + &prev_state, &prev_perm, nullptr, addr, size, MemoryState::FlagCode, + MemoryState::FlagCode, MemoryPermission::None, MemoryPermission::None, + MemoryAttribute::Mask, MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + MemoryState state{prev_state}; + + // Ensure state is mutable if permission allows write + if ((perm & MemoryPermission::Write) != MemoryPermission::None) { + if (prev_state == MemoryState::Code) { + state = MemoryState::CodeData; + } else if (prev_state == MemoryState::AliasCode) { + state = MemoryState::AliasCodeData; + } else { + UNREACHABLE(); + } + } + + // Return early if there is nothing to change + if (state == prev_state && perm == prev_perm) { + return RESULT_SUCCESS; + } + + const std::size_t num_pages{size / PageSize}; + const OperationType operation{(perm & MemoryPermission::Execute) != MemoryPermission::None + ? OperationType::ChangePermissionsAndRefresh + : OperationType::ChangePermissions}; + + if (const ResultCode result{Operate(addr, num_pages, perm, operation)}; result.IsError()) { + return result; + } + + block_manager->Update(addr, num_pages, state, perm); + + return RESULT_SUCCESS; +} + +MemoryInfo PageTable::QueryInfoImpl(VAddr addr) { + std::lock_guard lock{page_table_lock}; + + return block_manager->FindBlock(addr).GetMemoryInfo(); +} + +MemoryInfo PageTable::QueryInfo(VAddr addr) { + if (!Contains(addr, 1)) { + return {address_space_end, 0 - address_space_end, MemoryState::Inaccessible, + MemoryPermission::None, MemoryAttribute::None, MemoryPermission::None}; + } + + return QueryInfoImpl(addr); +} + +ResultCode PageTable::ReserveTransferMemory(VAddr addr, std::size_t size, MemoryPermission perm) { + std::lock_guard lock{page_table_lock}; + + MemoryState state{}; + MemoryAttribute attribute{}; + + if (const ResultCode result{CheckMemoryState( + &state, nullptr, &attribute, addr, size, + MemoryState::FlagCanTransfer | MemoryState::FlagReferenceCounted, + MemoryState::FlagCanTransfer | MemoryState::FlagReferenceCounted, + MemoryPermission::Mask, MemoryPermission::ReadAndWrite, MemoryAttribute::Mask, + MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + block_manager->Update(addr, size / PageSize, state, perm, attribute | MemoryAttribute::Locked); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::ResetTransferMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + MemoryState state{}; + + if (const ResultCode result{ + CheckMemoryState(&state, nullptr, nullptr, addr, size, + MemoryState::FlagCanTransfer | MemoryState::FlagReferenceCounted, + MemoryState::FlagCanTransfer | MemoryState::FlagReferenceCounted, + MemoryPermission::None, MemoryPermission::None, MemoryAttribute::Mask, + MemoryAttribute::Locked, MemoryAttribute::IpcAndDeviceMapped)}; + result.IsError()) { + return result; + } + + block_manager->Update(addr, size / PageSize, state, MemoryPermission::ReadAndWrite); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::SetMemoryAttribute(VAddr addr, std::size_t size, MemoryAttribute mask, + MemoryAttribute value) { + std::lock_guard lock{page_table_lock}; + + MemoryState state{}; + MemoryPermission perm{}; + MemoryAttribute attribute{}; + + if (const ResultCode result{CheckMemoryState( + &state, &perm, &attribute, addr, size, MemoryState::FlagCanChangeAttribute, + MemoryState::FlagCanChangeAttribute, MemoryPermission::None, MemoryPermission::None, + MemoryAttribute::LockedAndIpcLocked, MemoryAttribute::None, + MemoryAttribute::DeviceSharedAndUncached)}; + result.IsError()) { + return result; + } + + attribute = attribute & ~mask; + attribute = attribute | (mask & value); + + block_manager->Update(addr, size / PageSize, state, perm, attribute); + + return RESULT_SUCCESS; +} + +ResultCode PageTable::SetHeapCapacity(std::size_t new_heap_capacity) { + std::lock_guard lock{page_table_lock}; + heap_capacity = new_heap_capacity; + return RESULT_SUCCESS; +} + +ResultVal<VAddr> PageTable::SetHeapSize(std::size_t size) { + + if (size > heap_region_end - heap_region_start) { + return ERR_OUT_OF_MEMORY; + } + + const u64 previous_heap_size{GetHeapSize()}; + + UNIMPLEMENTED_IF_MSG(previous_heap_size > size, "Heap shrink is unimplemented"); + + // Increase the heap size + { + std::lock_guard lock{page_table_lock}; + + const u64 delta{size - previous_heap_size}; + + auto process{system.Kernel().CurrentProcess()}; + if (process->GetResourceLimit() && delta != 0 && + !process->GetResourceLimit()->Reserve(ResourceType::PhysicalMemory, delta)) { + return ERR_RESOURCE_LIMIT_EXCEEDED; + } + + PageLinkedList page_linked_list; + const std::size_t num_pages{delta / PageSize}; + + if (const ResultCode result{ + system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool)}; + result.IsError()) { + return result; + } + + if (IsRegionMapped(current_heap_addr, delta)) { + return ERR_INVALID_ADDRESS_STATE; + } + + if (const ResultCode result{ + Operate(current_heap_addr, num_pages, page_linked_list, OperationType::MapGroup)}; + result.IsError()) { + return result; + } + + block_manager->Update(current_heap_addr, num_pages, MemoryState::Normal, + MemoryPermission::ReadAndWrite); + + current_heap_addr = heap_region_start + size; + } + + return MakeResult<VAddr>(heap_region_start); +} + +ResultVal<VAddr> PageTable::AllocateAndMapMemory(std::size_t needed_num_pages, std::size_t align, + bool is_map_only, VAddr region_start, + std::size_t region_num_pages, MemoryState state, + MemoryPermission perm, PAddr map_addr) { + std::lock_guard lock{page_table_lock}; + + if (!CanContain(region_start, region_num_pages * PageSize, state)) { + return ERR_INVALID_ADDRESS_STATE; + } + + if (region_num_pages <= needed_num_pages) { + return ERR_OUT_OF_MEMORY; + } + + const VAddr addr{ + AllocateVirtualMemory(region_start, region_num_pages, needed_num_pages, align)}; + if (!addr) { + return ERR_OUT_OF_MEMORY; + } + + if (is_map_only) { + if (const ResultCode result{ + Operate(addr, needed_num_pages, perm, OperationType::Map, map_addr)}; + result.IsError()) { + return result; + } + } else { + PageLinkedList page_group; + if (const ResultCode result{system.Kernel().MemoryManager().Allocate( + page_group, needed_num_pages, memory_pool)}; + result.IsError()) { + return result; + } + if (const ResultCode result{ + Operate(addr, needed_num_pages, page_group, OperationType::MapGroup)}; + result.IsError()) { + return result; + } + } + + block_manager->Update(addr, needed_num_pages, state, perm); + + return MakeResult<VAddr>(addr); +} + +PAddr PageTable::GetPhysicalAddr(VAddr addr) { + return system.GetDeviceMemory().GetPhysicalAddr(addr); +} + +ResultCode PageTable::InitializeMemoryLayout(VAddr start, VAddr end) { + block_manager = std::make_unique<MemoryBlockManager>(start, end); + + return RESULT_SUCCESS; +} + +bool PageTable::IsRegionMapped(VAddr address, u64 size) { + return CheckMemoryState(address, size, MemoryState::All, MemoryState::Free, + MemoryPermission::Mask, MemoryPermission::None, MemoryAttribute::Mask, + MemoryAttribute::None, MemoryAttribute::IpcAndDeviceMapped) + .IsError(); +} + +bool PageTable::IsRegionContiguous(VAddr addr, u64 size) const { + auto start_ptr = system.Memory().GetPointer(addr); + for (u64 offset{}; offset < size; offset += PageSize) { + if (start_ptr != system.Memory().GetPointer(addr + offset)) { + return false; + } + start_ptr += PageSize; + } + return true; +} + +void PageTable::AddRegionToPages(VAddr start, std::size_t num_pages, + PageLinkedList& page_linked_list) { + VAddr addr{start}; + while (addr < start + (num_pages * PageSize)) { + const PAddr paddr{GetPhysicalAddr(addr)}; + if (!paddr) { + UNREACHABLE(); + } + page_linked_list.AddBlock(paddr, 1); + addr += PageSize; + } +} + +VAddr PageTable::AllocateVirtualMemory(VAddr start, std::size_t region_num_pages, + u64 needed_num_pages, std::size_t align) { + if (is_aslr_enabled) { + UNIMPLEMENTED(); + } + return block_manager->FindFreeArea(start, region_num_pages, needed_num_pages, align, 0, + IsKernel() ? 1 : 4); +} + +ResultCode PageTable::Operate(VAddr addr, std::size_t num_pages, const PageLinkedList& page_group, + OperationType operation) { + std::lock_guard lock{page_table_lock}; + + ASSERT(Common::IsAligned(addr, PageSize)); + ASSERT(num_pages > 0); + ASSERT(num_pages == page_group.GetNumPages()); + + for (const auto& node : page_group.Nodes()) { + const std::size_t size{node.GetNumPages() * PageSize}; + + switch (operation) { + case OperationType::MapGroup: + system.Memory().MapMemoryRegion(page_table_impl, addr, size, node.GetAddress()); + break; + default: + UNREACHABLE(); + } + + addr += size; + } + + return RESULT_SUCCESS; +} + +ResultCode PageTable::Operate(VAddr addr, std::size_t num_pages, MemoryPermission perm, + OperationType operation, PAddr map_addr) { + std::lock_guard lock{page_table_lock}; + + ASSERT(num_pages > 0); + ASSERT(Common::IsAligned(addr, PageSize)); + ASSERT(ContainsPages(addr, num_pages)); + + switch (operation) { + case OperationType::Unmap: + system.Memory().UnmapRegion(page_table_impl, addr, num_pages * PageSize); + break; + case OperationType::Map: { + ASSERT(map_addr); + ASSERT(Common::IsAligned(map_addr, PageSize)); + system.Memory().MapMemoryRegion(page_table_impl, addr, num_pages * PageSize, map_addr); + break; + } + case OperationType::ChangePermissions: + case OperationType::ChangePermissionsAndRefresh: + break; + default: + UNREACHABLE(); + } + return RESULT_SUCCESS; +} + +constexpr VAddr PageTable::GetRegionAddress(MemoryState state) const { + switch (state) { + case MemoryState::Free: + case MemoryState::Kernel: + return address_space_start; + case MemoryState::Normal: + return heap_region_start; + case MemoryState::Ipc: + case MemoryState::NonSecureIpc: + case MemoryState::NonDeviceIpc: + return alias_region_start; + case MemoryState::Stack: + return stack_region_start; + case MemoryState::Io: + case MemoryState::Static: + case MemoryState::ThreadLocal: + return kernel_map_region_start; + case MemoryState::Shared: + case MemoryState::AliasCode: + case MemoryState::AliasCodeData: + case MemoryState::Transfered: + case MemoryState::SharedTransfered: + case MemoryState::SharedCode: + case MemoryState::GeneratedCode: + case MemoryState::CodeOut: + return alias_code_region_start; + case MemoryState::Code: + case MemoryState::CodeData: + return code_region_start; + default: + UNREACHABLE(); + return {}; + } +} + +constexpr std::size_t PageTable::GetRegionSize(MemoryState state) const { + switch (state) { + case MemoryState::Free: + case MemoryState::Kernel: + return address_space_end - address_space_start; + case MemoryState::Normal: + return heap_region_end - heap_region_start; + case MemoryState::Ipc: + case MemoryState::NonSecureIpc: + case MemoryState::NonDeviceIpc: + return alias_region_end - alias_region_start; + case MemoryState::Stack: + return stack_region_end - stack_region_start; + case MemoryState::Io: + case MemoryState::Static: + case MemoryState::ThreadLocal: + return kernel_map_region_end - kernel_map_region_start; + case MemoryState::Shared: + case MemoryState::AliasCode: + case MemoryState::AliasCodeData: + case MemoryState::Transfered: + case MemoryState::SharedTransfered: + case MemoryState::SharedCode: + case MemoryState::GeneratedCode: + case MemoryState::CodeOut: + return alias_code_region_end - alias_code_region_start; + case MemoryState::Code: + case MemoryState::CodeData: + return code_region_end - code_region_start; + default: + UNREACHABLE(); + return {}; + } +} + +constexpr bool PageTable::CanContain(VAddr addr, std::size_t size, MemoryState state) const { + const VAddr end{addr + size}; + const VAddr last{end - 1}; + const VAddr region_start{GetRegionAddress(state)}; + const std::size_t region_size{GetRegionSize(state)}; + const bool is_in_region{region_start <= addr && addr < end && + last <= region_start + region_size - 1}; + const bool is_in_heap{!(end <= heap_region_start || heap_region_end <= addr)}; + const bool is_in_alias{!(end <= alias_region_start || alias_region_end <= addr)}; + + switch (state) { + case MemoryState::Free: + case MemoryState::Kernel: + return is_in_region; + case MemoryState::Io: + case MemoryState::Static: + case MemoryState::Code: + case MemoryState::CodeData: + case MemoryState::Shared: + case MemoryState::AliasCode: + case MemoryState::AliasCodeData: + case MemoryState::Stack: + case MemoryState::ThreadLocal: + case MemoryState::Transfered: + case MemoryState::SharedTransfered: + case MemoryState::SharedCode: + case MemoryState::GeneratedCode: + case MemoryState::CodeOut: + return is_in_region && !is_in_heap && !is_in_alias; + case MemoryState::Normal: + ASSERT(is_in_heap); + return is_in_region && !is_in_alias; + case MemoryState::Ipc: + case MemoryState::NonSecureIpc: + case MemoryState::NonDeviceIpc: + ASSERT(is_in_alias); + return is_in_region && !is_in_heap; + default: + return false; + } +} + +constexpr ResultCode PageTable::CheckMemoryState(const MemoryInfo& info, MemoryState state_mask, + MemoryState state, MemoryPermission perm_mask, + MemoryPermission perm, MemoryAttribute attr_mask, + MemoryAttribute attr) const { + // Validate the states match expectation + if ((info.state & state_mask) != state) { + return ERR_INVALID_ADDRESS_STATE; + } + if ((info.perm & perm_mask) != perm) { + return ERR_INVALID_ADDRESS_STATE; + } + if ((info.attribute & attr_mask) != attr) { + return ERR_INVALID_ADDRESS_STATE; + } + + return RESULT_SUCCESS; +} + +ResultCode PageTable::CheckMemoryState(MemoryState* out_state, MemoryPermission* out_perm, + MemoryAttribute* out_attr, VAddr addr, std::size_t size, + MemoryState state_mask, MemoryState state, + MemoryPermission perm_mask, MemoryPermission perm, + MemoryAttribute attr_mask, MemoryAttribute attr, + MemoryAttribute ignore_attr) { + std::lock_guard lock{page_table_lock}; + + // Get information about the first block + const VAddr last_addr{addr + size - 1}; + MemoryBlockManager::const_iterator it{block_manager->FindIterator(addr)}; + MemoryInfo info{it->GetMemoryInfo()}; + + // Validate all blocks in the range have correct state + const MemoryState first_state{info.state}; + const MemoryPermission first_perm{info.perm}; + const MemoryAttribute first_attr{info.attribute}; + + while (true) { + // Validate the current block + if (!(info.state == first_state)) { + return ERR_INVALID_ADDRESS_STATE; + } + if (!(info.perm == first_perm)) { + return ERR_INVALID_ADDRESS_STATE; + } + if (!((info.attribute | static_cast<MemoryAttribute>(ignore_attr)) == + (first_attr | static_cast<MemoryAttribute>(ignore_attr)))) { + return ERR_INVALID_ADDRESS_STATE; + } + + // Validate against the provided masks + if (const ResultCode result{ + CheckMemoryState(info, state_mask, state, perm_mask, perm, attr_mask, attr)}; + result.IsError()) { + return result; + } + + // Break once we're done + if (last_addr <= info.GetLastAddress()) { + break; + } + + // Advance our iterator + it++; + ASSERT(it != 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 = first_attr & static_cast<MemoryAttribute>(~ignore_attr); + } + + return RESULT_SUCCESS; +} + +} // namespace Kernel::Memory diff --git a/src/core/hle/kernel/memory/page_table.h b/src/core/hle/kernel/memory/page_table.h new file mode 100644 index 000000000..6c3a3c275 --- /dev/null +++ b/src/core/hle/kernel/memory/page_table.h @@ -0,0 +1,274 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <list> +#include <memory> +#include <mutex> + +#include "common/common_funcs.h" +#include "common/common_types.h" +#include "common/page_table.h" +#include "core/file_sys/program_metadata.h" +#include "core/hle/kernel/memory/memory_block.h" +#include "core/hle/kernel/memory/memory_manager.h" + +namespace Core { +class System; +} + +namespace Kernel::Memory { + +class MemoryBlockManager; + +class PageTable final : NonCopyable { +public: + explicit PageTable(Core::System& system); + + ResultCode InitializeForProcess(FileSys::ProgramAddressSpaceType as_type, bool enable_aslr, + VAddr code_addr, std::size_t code_size, + Memory::MemoryManager::Pool pool); + ResultCode MapProcessCode(VAddr addr, std::size_t pages_count, MemoryState state, + MemoryPermission perm); + ResultCode MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size); + ResultCode UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size); + ResultCode MapPhysicalMemory(VAddr addr, std::size_t size); + ResultCode UnmapPhysicalMemory(VAddr addr, std::size_t size); + ResultCode UnmapMemory(VAddr addr, std::size_t size); + ResultCode Map(VAddr dst_addr, VAddr src_addr, std::size_t size); + ResultCode Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size); + ResultCode MapPages(VAddr addr, PageLinkedList& page_linked_list, MemoryState state, + MemoryPermission perm); + ResultCode SetCodeMemoryPermission(VAddr addr, std::size_t size, MemoryPermission perm); + MemoryInfo QueryInfo(VAddr addr); + ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, MemoryPermission perm); + ResultCode ResetTransferMemory(VAddr addr, std::size_t size); + ResultCode SetMemoryAttribute(VAddr addr, std::size_t size, MemoryAttribute mask, + MemoryAttribute value); + ResultCode SetHeapCapacity(std::size_t new_heap_capacity); + ResultVal<VAddr> SetHeapSize(std::size_t size); + ResultVal<VAddr> AllocateAndMapMemory(std::size_t needed_num_pages, std::size_t align, + bool is_map_only, VAddr region_start, + std::size_t region_num_pages, MemoryState state, + MemoryPermission perm, PAddr map_addr = 0); + PAddr GetPhysicalAddr(VAddr addr); + + Common::PageTable& PageTableImpl() { + return page_table_impl; + } + + const Common::PageTable& PageTableImpl() const { + return page_table_impl; + } + +private: + enum class OperationType : u32 { + Map, + MapGroup, + Unmap, + ChangePermissions, + ChangePermissionsAndRefresh, + }; + + static constexpr MemoryAttribute DefaultMemoryIgnoreAttr = + MemoryAttribute::DontCareMask | MemoryAttribute::IpcLocked | MemoryAttribute::DeviceShared; + + ResultCode InitializeMemoryLayout(VAddr start, VAddr end); + ResultCode MapPages(VAddr addr, const PageLinkedList& page_linked_list, MemoryPermission perm); + void MapPhysicalMemory(PageLinkedList& page_linked_list, VAddr start, VAddr end); + bool IsRegionMapped(VAddr address, u64 size); + bool IsRegionContiguous(VAddr addr, u64 size) const; + void AddRegionToPages(VAddr start, std::size_t num_pages, PageLinkedList& page_linked_list); + MemoryInfo QueryInfoImpl(VAddr addr); + VAddr AllocateVirtualMemory(VAddr start, std::size_t region_num_pages, u64 needed_num_pages, + std::size_t align); + ResultCode Operate(VAddr addr, std::size_t num_pages, const PageLinkedList& page_group, + OperationType operation); + ResultCode Operate(VAddr addr, std::size_t num_pages, MemoryPermission perm, + OperationType operation, PAddr map_addr = 0); + constexpr VAddr GetRegionAddress(MemoryState state) const; + constexpr std::size_t GetRegionSize(MemoryState state) const; + constexpr bool CanContain(VAddr addr, std::size_t size, MemoryState state) const; + + constexpr ResultCode CheckMemoryState(const MemoryInfo& info, MemoryState state_mask, + MemoryState state, MemoryPermission perm_mask, + MemoryPermission perm, MemoryAttribute attr_mask, + MemoryAttribute attr) const; + ResultCode CheckMemoryState(MemoryState* out_state, MemoryPermission* out_perm, + MemoryAttribute* out_attr, VAddr addr, std::size_t size, + MemoryState state_mask, MemoryState state, + MemoryPermission perm_mask, MemoryPermission perm, + MemoryAttribute attr_mask, MemoryAttribute attr, + MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr); + ResultCode CheckMemoryState(VAddr addr, std::size_t size, MemoryState state_mask, + MemoryState state, MemoryPermission perm_mask, + MemoryPermission perm, MemoryAttribute attr_mask, + MemoryAttribute attr, + MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr) { + return CheckMemoryState(nullptr, nullptr, nullptr, addr, size, state_mask, state, perm_mask, + perm, attr_mask, attr, ignore_attr); + } + + std::recursive_mutex page_table_lock; + std::unique_ptr<MemoryBlockManager> block_manager; + +public: + constexpr VAddr GetAddressSpaceStart() const { + return address_space_start; + } + constexpr VAddr GetAddressSpaceEnd() const { + return address_space_end; + } + constexpr std::size_t GetAddressSpaceSize() const { + return address_space_end - address_space_start; + } + constexpr VAddr GetHeapRegionStart() const { + return heap_region_start; + } + constexpr VAddr GetHeapRegionEnd() const { + return heap_region_end; + } + constexpr std::size_t GetHeapRegionSize() const { + return heap_region_end - heap_region_start; + } + constexpr VAddr GetAliasRegionStart() const { + return alias_region_start; + } + constexpr VAddr GetAliasRegionEnd() const { + return alias_region_end; + } + constexpr std::size_t GetAliasRegionSize() const { + return alias_region_end - alias_region_start; + } + constexpr VAddr GetStackRegionStart() const { + return stack_region_start; + } + constexpr VAddr GetStackRegionEnd() const { + return stack_region_end; + } + constexpr std::size_t GetStackRegionSize() const { + return stack_region_end - stack_region_start; + } + constexpr VAddr GetKernelMapRegionStart() const { + return kernel_map_region_start; + } + constexpr VAddr GetKernelMapRegionEnd() const { + return kernel_map_region_end; + } + constexpr VAddr GetCodeRegionStart() const { + return code_region_start; + } + constexpr VAddr GetCodeRegionEnd() const { + return code_region_end; + } + constexpr VAddr GetAliasCodeRegionStart() const { + return alias_code_region_start; + } + constexpr VAddr GetAliasCodeRegionSize() const { + return alias_code_region_end - alias_code_region_start; + } + constexpr std::size_t GetAddressSpaceWidth() const { + return address_space_width; + } + constexpr std::size_t GetHeapSize() { + return current_heap_addr - heap_region_start; + } + constexpr std::size_t GetTotalHeapSize() { + return GetHeapSize() + physical_memory_usage; + } + constexpr bool IsInsideAddressSpace(VAddr address, std::size_t size) const { + return address_space_start <= address && address + size - 1 <= address_space_end - 1; + } + constexpr bool IsOutsideAliasRegion(VAddr address, std::size_t size) const { + return alias_region_start > address || address + size - 1 > alias_region_end - 1; + } + constexpr bool IsOutsideStackRegion(VAddr address, std::size_t size) const { + return stack_region_start > address || address + size - 1 > stack_region_end - 1; + } + constexpr bool IsInvalidRegion(VAddr address, std::size_t size) const { + return address + size - 1 > GetAliasCodeRegionStart() + GetAliasCodeRegionSize() - 1; + } + constexpr bool IsInsideHeapRegion(VAddr address, std::size_t size) const { + return address + size > heap_region_start && heap_region_end > address; + } + constexpr bool IsInsideAliasRegion(VAddr address, std::size_t size) const { + return address + size > alias_region_start && alias_region_end > address; + } + constexpr bool IsOutsideASLRRegion(VAddr address, std::size_t size) const { + if (IsInvalidRegion(address, size)) { + return true; + } + if (IsInsideHeapRegion(address, size)) { + return true; + } + if (IsInsideAliasRegion(address, size)) { + return true; + } + return {}; + } + constexpr bool IsInsideASLRRegion(VAddr address, std::size_t size) const { + return !IsOutsideASLRRegion(address, size); + } + +private: + constexpr bool Contains(VAddr addr) const { + return address_space_start <= addr && addr <= address_space_end - 1; + } + constexpr bool Contains(VAddr addr, std::size_t size) const { + return address_space_start <= addr && addr < addr + size && + addr + size - 1 <= address_space_end - 1; + } + constexpr bool IsKernel() const { + return is_kernel; + } + constexpr bool IsAslrEnabled() const { + return is_aslr_enabled; + } + + constexpr std::size_t GetNumGuardPages() const { + return IsKernel() ? 1 : 4; + } + + constexpr bool ContainsPages(VAddr addr, std::size_t num_pages) const { + return (address_space_start <= addr) && + (num_pages <= (address_space_end - address_space_start) / PageSize) && + (addr + num_pages * PageSize - 1 <= address_space_end - 1); + } + +private: + VAddr address_space_start{}; + VAddr address_space_end{}; + VAddr heap_region_start{}; + VAddr heap_region_end{}; + VAddr current_heap_end{}; + VAddr alias_region_start{}; + VAddr alias_region_end{}; + VAddr stack_region_start{}; + VAddr stack_region_end{}; + VAddr kernel_map_region_start{}; + VAddr kernel_map_region_end{}; + VAddr code_region_start{}; + VAddr code_region_end{}; + VAddr alias_code_region_start{}; + VAddr alias_code_region_end{}; + VAddr current_heap_addr{}; + + std::size_t heap_capacity{}; + std::size_t physical_memory_usage{}; + std::size_t max_heap_size{}; + std::size_t max_physical_memory_size{}; + std::size_t address_space_width{}; + + bool is_kernel{}; + bool is_aslr_enabled{}; + + MemoryManager::Pool memory_pool{MemoryManager::Pool::Application}; + + Common::PageTable page_table_impl; + + Core::System& system; +}; + +} // namespace Kernel::Memory |