diff options
Diffstat (limited to 'src/core/hle')
| -rw-r--r-- | src/core/hle/kernel/vm_manager.cpp | 1175 | ||||
| -rw-r--r-- | src/core/hle/kernel/vm_manager.h | 796 |
2 files changed, 0 insertions, 1971 deletions
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp deleted file mode 100644 index 024c22901..000000000 --- a/src/core/hle/kernel/vm_manager.cpp +++ /dev/null @@ -1,1175 +0,0 @@ -// Copyright 2015 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <algorithm> -#include <cstring> -#include <iterator> -#include <utility> -#include "common/alignment.h" -#include "common/assert.h" -#include "common/logging/log.h" -#include "common/memory_hook.h" -#include "core/core.h" -#include "core/file_sys/program_metadata.h" -#include "core/hle/kernel/errors.h" -#include "core/hle/kernel/process.h" -#include "core/hle/kernel/resource_limit.h" -#include "core/hle/kernel/vm_manager.h" -#include "core/memory.h" - -namespace Kernel { -namespace { -const char* GetMemoryStateName(MemoryState state) { - static constexpr const char* names[] = { - "Unmapped", "Io", - "Normal", "Code", - "CodeData", "Heap", - "Shared", "Unknown1", - "ModuleCode", "ModuleCodeData", - "IpcBuffer0", "Stack", - "ThreadLocal", "TransferMemoryIsolated", - "TransferMemory", "ProcessMemory", - "Inaccessible", "IpcBuffer1", - "IpcBuffer3", "KernelStack", - }; - - return names[ToSvcMemoryState(state)]; -} - -// Checks if a given address range lies within a larger address range. -constexpr bool IsInsideAddressRange(VAddr address, u64 size, VAddr address_range_begin, - VAddr address_range_end) { - const VAddr end_address = address + size - 1; - return address_range_begin <= address && end_address <= address_range_end - 1; -} -} // Anonymous namespace - -bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const { - ASSERT(base + size == next.base); - if (permissions != next.permissions || state != next.state || attribute != next.attribute || - type != next.type) { - return false; - } - if ((attribute & MemoryAttribute::DeviceMapped) == MemoryAttribute::DeviceMapped) { - // TODO: Can device mapped memory be merged sanely? - // Not merging it may cause inaccuracies versus hardware when memory layout is queried. - return false; - } - if (type == VMAType::AllocatedMemoryBlock) { - return true; - } - if (type == VMAType::BackingMemory && backing_memory + size != next.backing_memory) { - return false; - } - if (type == VMAType::MMIO && paddr + size != next.paddr) { - return false; - } - return true; -} - -VMManager::VMManager(Core::System& system) : system{system} { - // Default to assuming a 39-bit address space. This way we have a sane - // starting point with executables that don't provide metadata. - Reset(FileSys::ProgramAddressSpaceType::Is39Bit); -} - -VMManager::~VMManager() = default; - -void VMManager::Reset(FileSys::ProgramAddressSpaceType type) { - Clear(); - - InitializeMemoryRegionRanges(type); - - page_table.Resize(address_space_width); - - // Initialize the map with a single free region covering the entire managed space. - VirtualMemoryArea initial_vma; - initial_vma.size = address_space_end; - vma_map.emplace(initial_vma.base, initial_vma); - - UpdatePageTableForVMA(initial_vma); -} - -VMManager::VMAHandle VMManager::FindVMA(VAddr target) const { - if (target >= address_space_end) { - return vma_map.end(); - } else { - return std::prev(vma_map.upper_bound(target)); - } -} - -bool VMManager::IsValidHandle(VMAHandle handle) const { - return handle != vma_map.cend(); -} - -ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target, - std::shared_ptr<PhysicalMemory> block, - std::size_t offset, u64 size, - MemoryState state, VMAPermission perm) { - ASSERT(block != nullptr); - ASSERT(offset + size <= block->size()); - - // This is the appropriately sized VMA that will turn into our allocation. - CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size)); - VirtualMemoryArea& final_vma = vma_handle->second; - ASSERT(final_vma.size == size); - - final_vma.type = VMAType::AllocatedMemoryBlock; - final_vma.permissions = perm; - final_vma.state = state; - final_vma.backing_block = std::move(block); - final_vma.offset = offset; - UpdatePageTableForVMA(final_vma); - - return MakeResult<VMAHandle>(MergeAdjacent(vma_handle)); -} - -ResultVal<VMManager::VMAHandle> VMManager::MapBackingMemory(VAddr target, u8* memory, u64 size, - MemoryState state) { - ASSERT(memory != nullptr); - - // This is the appropriately sized VMA that will turn into our allocation. - CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size)); - VirtualMemoryArea& final_vma = vma_handle->second; - ASSERT(final_vma.size == size); - - final_vma.type = VMAType::BackingMemory; - final_vma.permissions = VMAPermission::ReadWrite; - final_vma.state = state; - final_vma.backing_memory = memory; - UpdatePageTableForVMA(final_vma); - - return MakeResult<VMAHandle>(MergeAdjacent(vma_handle)); -} - -ResultVal<VAddr> VMManager::FindFreeRegion(u64 size) const { - return FindFreeRegion(GetASLRRegionBaseAddress(), GetASLRRegionEndAddress(), size); -} - -ResultVal<VAddr> VMManager::FindFreeRegion(VAddr begin, VAddr end, u64 size) const { - ASSERT(begin < end); - ASSERT(size <= end - begin); - - const VMAHandle vma_handle = - std::find_if(vma_map.begin(), vma_map.end(), [begin, end, size](const auto& vma) { - if (vma.second.type != VMAType::Free) { - return false; - } - const VAddr vma_base = vma.second.base; - const VAddr vma_end = vma_base + vma.second.size; - const VAddr assumed_base = (begin < vma_base) ? vma_base : begin; - const VAddr used_range = assumed_base + size; - - return vma_base <= assumed_base && assumed_base < used_range && used_range < end && - used_range <= vma_end; - }); - - if (vma_handle == vma_map.cend()) { - // TODO(Subv): Find the correct error code here. - return RESULT_UNKNOWN; - } - - const VAddr target = std::max(begin, vma_handle->second.base); - return MakeResult<VAddr>(target); -} - -ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u64 size, - MemoryState state, - Common::MemoryHookPointer mmio_handler) { - // This is the appropriately sized VMA that will turn into our allocation. - CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size)); - VirtualMemoryArea& final_vma = vma_handle->second; - ASSERT(final_vma.size == size); - - final_vma.type = VMAType::MMIO; - final_vma.permissions = VMAPermission::ReadWrite; - final_vma.state = state; - final_vma.paddr = paddr; - final_vma.mmio_handler = std::move(mmio_handler); - UpdatePageTableForVMA(final_vma); - - return MakeResult<VMAHandle>(MergeAdjacent(vma_handle)); -} - -VMManager::VMAIter VMManager::Unmap(VMAIter vma_handle) { - VirtualMemoryArea& vma = vma_handle->second; - vma.type = VMAType::Free; - vma.permissions = VMAPermission::None; - vma.state = MemoryState::Unmapped; - vma.attribute = MemoryAttribute::None; - - vma.backing_block = nullptr; - vma.offset = 0; - vma.backing_memory = nullptr; - vma.paddr = 0; - - UpdatePageTableForVMA(vma); - - return MergeAdjacent(vma_handle); -} - -ResultCode VMManager::UnmapRange(VAddr target, u64 size) { - CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size)); - const VAddr target_end = target + size; - - const VMAIter end = vma_map.end(); - // The comparison against the end of the range must be done using addresses since VMAs can be - // merged during this process, causing invalidation of the iterators. - while (vma != end && vma->second.base < target_end) { - vma = std::next(Unmap(vma)); - } - - ASSERT(FindVMA(target)->second.size >= size); - - return RESULT_SUCCESS; -} - -VMManager::VMAHandle VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) { - VMAIter iter = StripIterConstness(vma_handle); - - VirtualMemoryArea& vma = iter->second; - vma.permissions = new_perms; - UpdatePageTableForVMA(vma); - - return MergeAdjacent(iter); -} - -ResultCode VMManager::ReprotectRange(VAddr target, u64 size, VMAPermission new_perms) { - CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size)); - const VAddr target_end = target + size; - - const VMAIter end = vma_map.end(); - // The comparison against the end of the range must be done using addresses since VMAs can be - // merged during this process, causing invalidation of the iterators. - while (vma != end && vma->second.base < target_end) { - vma = std::next(StripIterConstness(Reprotect(vma, new_perms))); - } - - return RESULT_SUCCESS; -} - -ResultVal<VAddr> VMManager::SetHeapSize(u64 size) { - if (size > GetHeapRegionSize()) { - return ERR_OUT_OF_MEMORY; - } - - // No need to do any additional work if the heap is already the given size. - if (size == GetCurrentHeapSize()) { - return MakeResult(heap_region_base); - } - - if (heap_memory == nullptr) { - // Initialize heap - heap_memory = std::make_shared<PhysicalMemory>(size); - heap_end = heap_region_base + size; - } else { - UnmapRange(heap_region_base, GetCurrentHeapSize()); - } - - // If necessary, expand backing vector to cover new heap extents in - // the case of allocating. Otherwise, shrink the backing memory, - // if a smaller heap has been requested. - heap_memory->resize(size); - heap_memory->shrink_to_fit(); - RefreshMemoryBlockMappings(heap_memory.get()); - - heap_end = heap_region_base + size; - ASSERT(GetCurrentHeapSize() == heap_memory->size()); - - const auto mapping_result = - MapMemoryBlock(heap_region_base, heap_memory, 0, size, MemoryState::Heap); - if (mapping_result.Failed()) { - return mapping_result.Code(); - } - - return MakeResult<VAddr>(heap_region_base); -} - -ResultCode VMManager::MapPhysicalMemory(VAddr target, u64 size) { - // Check how much memory we've already mapped. - const auto mapped_size_result = SizeOfAllocatedVMAsInRange(target, size); - if (mapped_size_result.Failed()) { - return mapped_size_result.Code(); - } - - // If we've already mapped the desired amount, return early. - const std::size_t mapped_size = *mapped_size_result; - if (mapped_size == size) { - return RESULT_SUCCESS; - } - - // Check that we can map the memory we want. - const auto res_limit = system.CurrentProcess()->GetResourceLimit(); - const u64 physmem_remaining = res_limit->GetMaxResourceValue(ResourceType::PhysicalMemory) - - res_limit->GetCurrentResourceValue(ResourceType::PhysicalMemory); - if (physmem_remaining < (size - mapped_size)) { - return ERR_RESOURCE_LIMIT_EXCEEDED; - } - - // Keep track of the memory regions we unmap. - std::vector<std::pair<u64, u64>> mapped_regions; - ResultCode result = RESULT_SUCCESS; - - // Iterate, trying to map memory. - { - const auto end_addr = target + size; - const auto last_addr = end_addr - 1; - VAddr cur_addr = target; - - auto iter = FindVMA(target); - ASSERT(iter != vma_map.end()); - - while (true) { - const auto& vma = iter->second; - const auto vma_start = vma.base; - const auto vma_end = vma_start + vma.size; - const auto vma_last = vma_end - 1; - - // Map the memory block - const auto map_size = std::min(end_addr - cur_addr, vma_end - cur_addr); - if (vma.state == MemoryState::Unmapped) { - const auto map_res = - MapMemoryBlock(cur_addr, std::make_shared<PhysicalMemory>(map_size), 0, - map_size, MemoryState::Heap, VMAPermission::ReadWrite); - result = map_res.Code(); - if (result.IsError()) { - break; - } - - mapped_regions.emplace_back(cur_addr, map_size); - } - - // Break once we hit the end of the range. - if (last_addr <= vma_last) { - break; - } - - // Advance to the next block. - cur_addr = vma_end; - iter = FindVMA(cur_addr); - ASSERT(iter != vma_map.end()); - } - } - - // If we failed, unmap memory. - if (result.IsError()) { - for (const auto [unmap_address, unmap_size] : mapped_regions) { - ASSERT_MSG(UnmapRange(unmap_address, unmap_size).IsSuccess(), - "Failed to unmap memory range."); - } - - return result; - } - - // Update amount of mapped physical memory. - physical_memory_mapped += size - mapped_size; - - return RESULT_SUCCESS; -} - -ResultCode VMManager::UnmapPhysicalMemory(VAddr target, u64 size) { - // Check how much memory is currently mapped. - const auto mapped_size_result = SizeOfUnmappablePhysicalMemoryInRange(target, size); - if (mapped_size_result.Failed()) { - return mapped_size_result.Code(); - } - - // If we've already unmapped all the memory, return early. - const std::size_t mapped_size = *mapped_size_result; - if (mapped_size == 0) { - return RESULT_SUCCESS; - } - - // Keep track of the memory regions we unmap. - std::vector<std::pair<u64, u64>> unmapped_regions; - ResultCode result = RESULT_SUCCESS; - - // Try to unmap regions. - { - const auto end_addr = target + size; - const auto last_addr = end_addr - 1; - VAddr cur_addr = target; - - auto iter = FindVMA(target); - ASSERT(iter != vma_map.end()); - - while (true) { - const auto& vma = iter->second; - const auto vma_start = vma.base; - const auto vma_end = vma_start + vma.size; - const auto vma_last = vma_end - 1; - - // Unmap the memory block - const auto unmap_size = std::min(end_addr - cur_addr, vma_end - cur_addr); - if (vma.state == MemoryState::Heap) { - result = UnmapRange(cur_addr, unmap_size); - if (result.IsError()) { - break; - } - - unmapped_regions.emplace_back(cur_addr, unmap_size); - } - - // Break once we hit the end of the range. - if (last_addr <= vma_last) { - break; - } - - // Advance to the next block. - cur_addr = vma_end; - iter = FindVMA(cur_addr); - ASSERT(iter != vma_map.end()); - } - } - - // If we failed, re-map regions. - // TODO: Preserve memory contents? - if (result.IsError()) { - for (const auto [map_address, map_size] : unmapped_regions) { - const auto remap_res = - MapMemoryBlock(map_address, std::make_shared<PhysicalMemory>(map_size), 0, map_size, - MemoryState::Heap, VMAPermission::None); - ASSERT_MSG(remap_res.Succeeded(), "Failed to remap a memory block."); - } - - return result; - } - - // Update mapped amount - physical_memory_mapped -= mapped_size; - - return RESULT_SUCCESS; -} - -ResultCode VMManager::MapCodeMemory(VAddr dst_address, VAddr src_address, u64 size) { - constexpr auto ignore_attribute = MemoryAttribute::LockedForIPC | MemoryAttribute::DeviceMapped; - const auto src_check_result = CheckRangeState( - src_address, size, MemoryState::All, MemoryState::Heap, VMAPermission::All, - VMAPermission::ReadWrite, MemoryAttribute::Mask, MemoryAttribute::None, ignore_attribute); - - if (src_check_result.Failed()) { - return src_check_result.Code(); - } - - const auto mirror_result = - MirrorMemory(dst_address, src_address, size, MemoryState::ModuleCode); - if (mirror_result.IsError()) { - return mirror_result; - } - - // Ensure we lock the source memory region. - const auto src_vma_result = CarveVMARange(src_address, size); - if (src_vma_result.Failed()) { - return src_vma_result.Code(); - } - auto src_vma_iter = *src_vma_result; - src_vma_iter->second.attribute = MemoryAttribute::Locked; - Reprotect(src_vma_iter, VMAPermission::Read); - - // The destination memory region is fine as is, however we need to make it read-only. - return ReprotectRange(dst_address, size, VMAPermission::Read); -} - -ResultCode VMManager::UnmapCodeMemory(VAddr dst_address, VAddr src_address, u64 size) { - constexpr auto ignore_attribute = MemoryAttribute::LockedForIPC | MemoryAttribute::DeviceMapped; - const auto src_check_result = CheckRangeState( - src_address, size, MemoryState::All, MemoryState::Heap, VMAPermission::None, - VMAPermission::None, MemoryAttribute::Mask, MemoryAttribute::Locked, ignore_attribute); - - if (src_check_result.Failed()) { - return src_check_result.Code(); - } - - // Yes, the kernel only checks the first page of the region. - const auto dst_check_result = - CheckRangeState(dst_address, Memory::PAGE_SIZE, MemoryState::FlagModule, - MemoryState::FlagModule, VMAPermission::None, VMAPermission::None, - MemoryAttribute::Mask, MemoryAttribute::None, ignore_attribute); - - if (dst_check_result.Failed()) { - return dst_check_result.Code(); - } - - const auto dst_memory_state = std::get<MemoryState>(*dst_check_result); - const auto dst_contiguous_check_result = CheckRangeState( - dst_address, size, MemoryState::All, dst_memory_state, VMAPermission::None, - VMAPermission::None, MemoryAttribute::Mask, MemoryAttribute::None, ignore_attribute); - - if (dst_contiguous_check_result.Failed()) { - return dst_contiguous_check_result.Code(); - } - - const auto unmap_result = UnmapRange(dst_address, size); - if (unmap_result.IsError()) { - return unmap_result; - } - - // With the mirrored portion unmapped, restore the original region's traits. - const auto src_vma_result = CarveVMARange(src_address, size); - if (src_vma_result.Failed()) { - return src_vma_result.Code(); - } - auto src_vma_iter = *src_vma_result; - src_vma_iter->second.state = MemoryState::Heap; - src_vma_iter->second.attribute = MemoryAttribute::None; - Reprotect(src_vma_iter, VMAPermission::ReadWrite); - - if (dst_memory_state == MemoryState::ModuleCode) { - system.InvalidateCpuInstructionCaches(); - } - - return unmap_result; -} - -MemoryInfo VMManager::QueryMemory(VAddr address) const { - const auto vma = FindVMA(address); - MemoryInfo memory_info{}; - - if (IsValidHandle(vma)) { - memory_info.base_address = vma->second.base; - memory_info.attributes = ToSvcMemoryAttribute(vma->second.attribute); - memory_info.permission = static_cast<u32>(vma->second.permissions); - memory_info.size = vma->second.size; - memory_info.state = ToSvcMemoryState(vma->second.state); - } else { - memory_info.base_address = address_space_end; - memory_info.permission = static_cast<u32>(VMAPermission::None); - memory_info.size = 0 - address_space_end; - memory_info.state = static_cast<u32>(MemoryState::Inaccessible); - } - - return memory_info; -} - -ResultCode VMManager::SetMemoryAttribute(VAddr address, u64 size, MemoryAttribute mask, - MemoryAttribute attribute) { - constexpr auto ignore_mask = - MemoryAttribute::Uncached | MemoryAttribute::DeviceMapped | MemoryAttribute::Locked; - constexpr auto attribute_mask = ~ignore_mask; - - const auto result = CheckRangeState( - address, size, MemoryState::FlagUncached, MemoryState::FlagUncached, VMAPermission::None, - VMAPermission::None, attribute_mask, MemoryAttribute::None, ignore_mask); - - if (result.Failed()) { - return result.Code(); - } - - const auto [prev_state, prev_permissions, prev_attributes] = *result; - const auto new_attribute = (prev_attributes & ~mask) | (mask & attribute); - - const auto carve_result = CarveVMARange(address, size); - if (carve_result.Failed()) { - return carve_result.Code(); - } - - auto vma_iter = *carve_result; - vma_iter->second.attribute = new_attribute; - - MergeAdjacent(vma_iter); - return RESULT_SUCCESS; -} - -ResultCode VMManager::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state) { - const auto vma = FindVMA(src_addr); - - ASSERT_MSG(vma != vma_map.end(), "Invalid memory address"); - ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address"); - - // The returned VMA might be a bigger one encompassing the desired address. - const auto vma_offset = src_addr - vma->first; - ASSERT_MSG(vma_offset + size <= vma->second.size, - "Shared memory exceeds bounds of mapped block"); - - const std::shared_ptr<PhysicalMemory>& backing_block = vma->second.backing_block; - const std::size_t backing_block_offset = vma->second.offset + vma_offset; - - CASCADE_RESULT(auto new_vma, - MapMemoryBlock(dst_addr, backing_block, backing_block_offset, size, state)); - // Protect mirror with permissions from old region - Reprotect(new_vma, vma->second.permissions); - // Remove permissions from old region - ReprotectRange(src_addr, size, VMAPermission::None); - - return RESULT_SUCCESS; -} - -void VMManager::RefreshMemoryBlockMappings(const PhysicalMemory* block) { - // If this ever proves to have a noticeable performance impact, allow users of the function to - // specify a specific range of addresses to limit the scan to. - for (const auto& p : vma_map) { - const VirtualMemoryArea& vma = p.second; - if (block == vma.backing_block.get()) { - UpdatePageTableForVMA(vma); - } - } -} - -void VMManager::LogLayout() const { - for (const auto& p : vma_map) { - const VirtualMemoryArea& vma = p.second; - LOG_DEBUG(Kernel, "{:016X} - {:016X} size: {:016X} {}{}{} {}", vma.base, - vma.base + vma.size, vma.size, - (u8)vma.permissions & (u8)VMAPermission::Read ? 'R' : '-', - (u8)vma.permissions & (u8)VMAPermission::Write ? 'W' : '-', - (u8)vma.permissions & (u8)VMAPermission::Execute ? 'X' : '-', - GetMemoryStateName(vma.state)); - } -} - -VMManager::VMAIter VMManager::StripIterConstness(const VMAHandle& iter) { - // This uses a neat C++ trick to convert a const_iterator to a regular iterator, given - // non-const access to its container. - return vma_map.erase(iter, iter); // Erases an empty range of elements -} - -ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u64 size) { - ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x{:016X}", size); - ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x{:016X}", base); - - VMAIter vma_handle = StripIterConstness(FindVMA(base)); - if (vma_handle == vma_map.end()) { - // Target address is outside the range managed by the kernel - return ERR_INVALID_ADDRESS; - } - - const VirtualMemoryArea& vma = vma_handle->second; - if (vma.type != VMAType::Free) { - // Region is already allocated - return ERR_INVALID_ADDRESS_STATE; - } - - const VAddr start_in_vma = base - vma.base; - const VAddr end_in_vma = start_in_vma + size; - - if (end_in_vma > vma.size) { - // Requested allocation doesn't fit inside VMA - return ERR_INVALID_ADDRESS_STATE; - } - - if (end_in_vma != vma.size) { - // Split VMA at the end of the allocated region - SplitVMA(vma_handle, end_in_vma); - } - if (start_in_vma != 0) { - // Split VMA at the start of the allocated region - vma_handle = SplitVMA(vma_handle, start_in_vma); - } - - return MakeResult<VMAIter>(vma_handle); -} - -ResultVal<VMManager::VMAIter> VMManager::CarveVMARange(VAddr target, u64 size) { - ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x{:016X}", size); - ASSERT_MSG((target & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x{:016X}", target); - - const VAddr target_end = target + size; - ASSERT(target_end >= target); - ASSERT(target_end <= address_space_end); - ASSERT(size > 0); - - VMAIter begin_vma = StripIterConstness(FindVMA(target)); - const VMAIter i_end = vma_map.lower_bound(target_end); - if (std::any_of(begin_vma, i_end, - [](const auto& entry) { return entry.second.type == VMAType::Free; })) { - return ERR_INVALID_ADDRESS_STATE; - } - - if (target != begin_vma->second.base) { - begin_vma = SplitVMA(begin_vma, target - begin_vma->second.base); - } - - VMAIter end_vma = StripIterConstness(FindVMA(target_end)); - if (end_vma != vma_map.end() && target_end != end_vma->second.base) { - end_vma = SplitVMA(end_vma, target_end - end_vma->second.base); - } - - return MakeResult<VMAIter>(begin_vma); -} - -VMManager::VMAIter VMManager::SplitVMA(VMAIter vma_handle, u64 offset_in_vma) { - VirtualMemoryArea& old_vma = vma_handle->second; - VirtualMemoryArea new_vma = old_vma; // Make a copy of the VMA - - // For now, don't allow no-op VMA splits (trying to split at a boundary) because it's probably - // a bug. This restriction might be removed later. - ASSERT(offset_in_vma < old_vma.size); - ASSERT(offset_in_vma > 0); - - old_vma.size = offset_in_vma; - new_vma.base += offset_in_vma; - new_vma.size -= offset_in_vma; - - switch (new_vma.type) { - case VMAType::Free: - break; - case VMAType::AllocatedMemoryBlock: - new_vma.offset += offset_in_vma; - break; - case VMAType::BackingMemory: - new_vma.backing_memory += offset_in_vma; - break; - case VMAType::MMIO: - new_vma.paddr += offset_in_vma; - break; - } - - ASSERT(old_vma.CanBeMergedWith(new_vma)); - - return vma_map.emplace_hint(std::next(vma_handle), new_vma.base, new_vma); -} - -VMManager::VMAIter VMManager::MergeAdjacent(VMAIter iter) { - const VMAIter next_vma = std::next(iter); - if (next_vma != vma_map.end() && iter->second.CanBeMergedWith(next_vma->second)) { - MergeAdjacentVMA(iter->second, next_vma->second); - vma_map.erase(next_vma); - } - - if (iter != vma_map.begin()) { - VMAIter prev_vma = std::prev(iter); - if (prev_vma->second.CanBeMergedWith(iter->second)) { - MergeAdjacentVMA(prev_vma->second, iter->second); - vma_map.erase(iter); - iter = prev_vma; - } - } - - return iter; -} - -void VMManager::MergeAdjacentVMA(VirtualMemoryArea& left, const VirtualMemoryArea& right) { - ASSERT(left.CanBeMergedWith(right)); - - // Always merge allocated memory blocks, even when they don't share the same backing block. - if (left.type == VMAType::AllocatedMemoryBlock && - (left.backing_block != right.backing_block || left.offset + left.size != right.offset)) { - - // Check if we can save work. - if (left.offset == 0 && left.size == left.backing_block->size()) { - // Fast case: left is an entire backing block. - left.backing_block->resize(left.size + right.size); - std::memcpy(left.backing_block->data() + left.size, - right.backing_block->data() + right.offset, right.size); - } else { - // Slow case: make a new memory block for left and right. - auto new_memory = std::make_shared<PhysicalMemory>(); - new_memory->resize(left.size + right.size); - std::memcpy(new_memory->data(), left.backing_block->data() + left.offset, left.size); - std::memcpy(new_memory->data() + left.size, right.backing_block->data() + right.offset, - right.size); - - left.backing_block = std::move(new_memory); - left.offset = 0; - } - - // Page table update is needed, because backing memory changed. - left.size += right.size; - UpdatePageTableForVMA(left); - } else { - // Just update the size. - left.size += right.size; - } -} - -void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) { - auto& memory = system.Memory(); - - switch (vma.type) { - case VMAType::Free: - memory.UnmapRegion(page_table, vma.base, vma.size); - break; - case VMAType::AllocatedMemoryBlock: - memory.MapMemoryRegion(page_table, vma.base, vma.size, *vma.backing_block, vma.offset); - break; - case VMAType::BackingMemory: - memory.MapMemoryRegion(page_table, vma.base, vma.size, vma.backing_memory); - break; - case VMAType::MMIO: - memory.MapIoRegion(page_table, vma.base, vma.size, vma.mmio_handler); - break; - } -} - -void VMManager::InitializeMemoryRegionRanges(FileSys::ProgramAddressSpaceType type) { - u64 map_region_size = 0; - u64 heap_region_size = 0; - u64 stack_region_size = 0; - u64 tls_io_region_size = 0; - - u64 stack_and_tls_io_end = 0; - - switch (type) { - case FileSys::ProgramAddressSpaceType::Is32Bit: - case FileSys::ProgramAddressSpaceType::Is32BitNoMap: - address_space_width = 32; - code_region_base = 0x200000; - code_region_end = code_region_base + 0x3FE00000; - aslr_region_base = 0x200000; - aslr_region_end = aslr_region_base + 0xFFE00000; - if (type == FileSys::ProgramAddressSpaceType::Is32Bit) { - map_region_size = 0x40000000; - heap_region_size = 0x40000000; - } else { - map_region_size = 0; - heap_region_size = 0x80000000; - } - stack_and_tls_io_end = 0x40000000; - break; - case FileSys::ProgramAddressSpaceType::Is36Bit: - address_space_width = 36; - code_region_base = 0x8000000; - code_region_end = code_region_base + 0x78000000; - aslr_region_base = 0x8000000; - aslr_region_end = aslr_region_base + 0xFF8000000; - map_region_size = 0x180000000; - heap_region_size = 0x180000000; - stack_and_tls_io_end = 0x80000000; - break; - case FileSys::ProgramAddressSpaceType::Is39Bit: - address_space_width = 39; - code_region_base = 0x8000000; - code_region_end = code_region_base + 0x80000000; - aslr_region_base = 0x8000000; - aslr_region_end = aslr_region_base + 0x7FF8000000; - map_region_size = 0x1000000000; - heap_region_size = 0x180000000; - stack_region_size = 0x80000000; - tls_io_region_size = 0x1000000000; - break; - default: - UNREACHABLE_MSG("Invalid address space type specified: {}", static_cast<u32>(type)); - return; - } - - const u64 stack_and_tls_io_begin = aslr_region_base; - - address_space_base = 0; - address_space_end = 1ULL << address_space_width; - - map_region_base = code_region_end; - map_region_end = map_region_base + map_region_size; - - heap_region_base = map_region_end; - heap_region_end = heap_region_base + heap_region_size; - heap_end = heap_region_base; - - stack_region_base = heap_region_end; - stack_region_end = stack_region_base + stack_region_size; - - tls_io_region_base = stack_region_end; - tls_io_region_end = tls_io_region_base + tls_io_region_size; - - if (stack_region_size == 0) { - stack_region_base = stack_and_tls_io_begin; - stack_region_end = stack_and_tls_io_end; - } - - if (tls_io_region_size == 0) { - tls_io_region_base = stack_and_tls_io_begin; - tls_io_region_end = stack_and_tls_io_end; - } -} - -void VMManager::Clear() { - ClearVMAMap(); - ClearPageTable(); -} - -void VMManager::ClearVMAMap() { - vma_map.clear(); -} - -void VMManager::ClearPageTable() { - std::fill(page_table.pointers.begin(), page_table.pointers.end(), nullptr); - page_table.special_regions.clear(); - std::fill(page_table.attributes.begin(), page_table.attributes.end(), - Common::PageType::Unmapped); -} - -VMManager::CheckResults VMManager::CheckRangeState(VAddr address, u64 size, MemoryState state_mask, - MemoryState state, VMAPermission permission_mask, - VMAPermission permissions, - MemoryAttribute attribute_mask, - MemoryAttribute attribute, - MemoryAttribute ignore_mask) const { - auto iter = FindVMA(address); - - // If we don't have a valid VMA handle at this point, then it means this is - // being called with an address outside of the address space, which is definitely - // indicative of a bug, as this function only operates on mapped memory regions. - DEBUG_ASSERT(IsValidHandle(iter)); - - const VAddr end_address = address + size - 1; - const MemoryAttribute initial_attributes = iter->second.attribute; - const VMAPermission initial_permissions = iter->second.permissions; - const MemoryState initial_state = iter->second.state; - - while (true) { - // The iterator should be valid throughout the traversal. Hitting the end of - // the mapped VMA regions is unquestionably indicative of a bug. - DEBUG_ASSERT(IsValidHandle(iter)); - - const auto& vma = iter->second; - - if (vma.state != initial_state) { - return ERR_INVALID_ADDRESS_STATE; - } - - if ((vma.state & state_mask) != state) { - return ERR_INVALID_ADDRESS_STATE; - } - - if (vma.permissions != initial_permissions) { - return ERR_INVALID_ADDRESS_STATE; - } - - if ((vma.permissions & permission_mask) != permissions) { - return ERR_INVALID_ADDRESS_STATE; - } - - if ((vma.attribute | ignore_mask) != (initial_attributes | ignore_mask)) { - return ERR_INVALID_ADDRESS_STATE; - } - - if ((vma.attribute & attribute_mask) != attribute) { - return ERR_INVALID_ADDRESS_STATE; - } - - if (end_address <= vma.EndAddress()) { - break; - } - - ++iter; - } - - return MakeResult( - std::make_tuple(initial_state, initial_permissions, initial_attributes & ~ignore_mask)); -} - -ResultVal<std::size_t> VMManager::SizeOfAllocatedVMAsInRange(VAddr address, - std::size_t size) const { - const VAddr end_addr = address + size; - const VAddr last_addr = end_addr - 1; - std::size_t mapped_size = 0; - - VAddr cur_addr = address; - auto iter = FindVMA(cur_addr); - ASSERT(iter != vma_map.end()); - - while (true) { - const auto& vma = iter->second; - const VAddr vma_start = vma.base; - const VAddr vma_end = vma_start + vma.size; - const VAddr vma_last = vma_end - 1; - - // Add size if relevant. - if (vma.state != MemoryState::Unmapped) { - mapped_size += std::min(end_addr - cur_addr, vma_end - cur_addr); - } - - // Break once we hit the end of the range. - if (last_addr <= vma_last) { - break; - } - - // Advance to the next block. - cur_addr = vma_end; - iter = std::next(iter); - ASSERT(iter != vma_map.end()); - } - - return MakeResult(mapped_size); -} - -ResultVal<std::size_t> VMManager::SizeOfUnmappablePhysicalMemoryInRange(VAddr address, - std::size_t size) const { - const VAddr end_addr = address + size; - const VAddr last_addr = end_addr - 1; - std::size_t mapped_size = 0; - - VAddr cur_addr = address; - auto iter = FindVMA(cur_addr); - ASSERT(iter != vma_map.end()); - - while (true) { - const auto& vma = iter->second; - const auto vma_start = vma.base; - const auto vma_end = vma_start + vma.size; - const auto vma_last = vma_end - 1; - const auto state = vma.state; - const auto attr = vma.attribute; - - // Memory within region must be free or mapped heap. - if (!((state == MemoryState::Heap && attr == MemoryAttribute::None) || - (state == MemoryState::Unmapped))) { - return ERR_INVALID_ADDRESS_STATE; - } - - // Add size if relevant. - if (state != MemoryState::Unmapped) { - mapped_size += std::min(end_addr - cur_addr, vma_end - cur_addr); - } - - // Break once we hit the end of the range. - if (last_addr <= vma_last) { - break; - } - - // Advance to the next block. - cur_addr = vma_end; - iter = std::next(iter); - ASSERT(iter != vma_map.end()); - } - - return MakeResult(mapped_size); -} - -u64 VMManager::GetTotalPhysicalMemoryAvailable() const { - LOG_WARNING(Kernel, "(STUBBED) called"); - return 0xF8000000; -} - -VAddr VMManager::GetAddressSpaceBaseAddress() const { - return address_space_base; -} - -VAddr VMManager::GetAddressSpaceEndAddress() const { - return address_space_end; -} - -u64 VMManager::GetAddressSpaceSize() const { - return address_space_end - address_space_base; -} - -u64 VMManager::GetAddressSpaceWidth() const { - return address_space_width; -} - -bool VMManager::IsWithinAddressSpace(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetAddressSpaceBaseAddress(), - GetAddressSpaceEndAddress()); -} - -VAddr VMManager::GetASLRRegionBaseAddress() const { - return aslr_region_base; -} - -VAddr VMManager::GetASLRRegionEndAddress() const { - return aslr_region_end; -} - -u64 VMManager::GetASLRRegionSize() const { - return aslr_region_end - aslr_region_base; -} - -bool VMManager::IsWithinASLRRegion(VAddr begin, u64 size) const { - const VAddr range_end = begin + size; - const VAddr aslr_start = GetASLRRegionBaseAddress(); - const VAddr aslr_end = GetASLRRegionEndAddress(); - - if (aslr_start > begin || begin > range_end || range_end - 1 > aslr_end - 1) { - return false; - } - - if (range_end > heap_region_base && heap_region_end > begin) { - return false; - } - - if (range_end > map_region_base && map_region_end > begin) { - return false; - } - - return true; -} - -VAddr VMManager::GetCodeRegionBaseAddress() const { - return code_region_base; -} - -VAddr VMManager::GetCodeRegionEndAddress() const { - return code_region_end; -} - -u64 VMManager::GetCodeRegionSize() const { - return code_region_end - code_region_base; -} - -bool VMManager::IsWithinCodeRegion(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetCodeRegionBaseAddress(), - GetCodeRegionEndAddress()); -} - -VAddr VMManager::GetHeapRegionBaseAddress() const { - return heap_region_base; -} - -VAddr VMManager::GetHeapRegionEndAddress() const { - return heap_region_end; -} - -u64 VMManager::GetHeapRegionSize() const { - return heap_region_end - heap_region_base; -} - -u64 VMManager::GetCurrentHeapSize() const { - return heap_end - heap_region_base; -} - -bool VMManager::IsWithinHeapRegion(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetHeapRegionBaseAddress(), - GetHeapRegionEndAddress()); -} - -VAddr VMManager::GetMapRegionBaseAddress() const { - return map_region_base; -} - -VAddr VMManager::GetMapRegionEndAddress() const { - return map_region_end; -} - -u64 VMManager::GetMapRegionSize() const { - return map_region_end - map_region_base; -} - -bool VMManager::IsWithinMapRegion(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetMapRegionBaseAddress(), GetMapRegionEndAddress()); -} - -VAddr VMManager::GetStackRegionBaseAddress() const { - return stack_region_base; -} - -VAddr VMManager::GetStackRegionEndAddress() const { - return stack_region_end; -} - -u64 VMManager::GetStackRegionSize() const { - return stack_region_end - stack_region_base; -} - -bool VMManager::IsWithinStackRegion(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetStackRegionBaseAddress(), - GetStackRegionEndAddress()); -} - -VAddr VMManager::GetTLSIORegionBaseAddress() const { - return tls_io_region_base; -} - -VAddr VMManager::GetTLSIORegionEndAddress() const { - return tls_io_region_end; -} - -u64 VMManager::GetTLSIORegionSize() const { - return tls_io_region_end - tls_io_region_base; -} - -bool VMManager::IsWithinTLSIORegion(VAddr address, u64 size) const { - return IsInsideAddressRange(address, size, GetTLSIORegionBaseAddress(), - GetTLSIORegionEndAddress()); -} - -} // namespace Kernel diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h deleted file mode 100644 index 90b4b006a..000000000 --- a/src/core/hle/kernel/vm_manager.h +++ /dev/null @@ -1,796 +0,0 @@ -// Copyright 2015 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#pragma once - -#include <map> -#include <memory> -#include <tuple> -#include <vector> -#include "common/common_types.h" -#include "common/memory_hook.h" -#include "common/page_table.h" -#include "core/hle/kernel/physical_memory.h" -#include "core/hle/result.h" -#include "core/memory.h" - -namespace Core { -class System; -} - -namespace FileSys { -enum class ProgramAddressSpaceType : u8; -} - -namespace Kernel { - -enum class VMAType : u8 { - /// VMA represents an unmapped region of the address space. - Free, - /// VMA is backed by a ref-counted allocate memory block. - AllocatedMemoryBlock, - /// VMA is backed by a raw, unmanaged pointer. - BackingMemory, - /// VMA is mapped to MMIO registers at a fixed PAddr. - MMIO, - // TODO(yuriks): Implement MemoryAlias to support MAP/UNMAP -}; - -/// Permissions for mapped memory blocks -enum class VMAPermission : u8 { - None = 0, - Read = 1, - Write = 2, - Execute = 4, - - ReadWrite = Read | Write, - ReadExecute = Read | Execute, - WriteExecute = Write | Execute, - ReadWriteExecute = Read | Write | Execute, - - // Used as a wildcard when checking permissions across memory ranges - All = 0xFF, -}; - -constexpr VMAPermission operator|(VMAPermission lhs, VMAPermission rhs) { - return static_cast<VMAPermission>(u32(lhs) | u32(rhs)); -} - -constexpr VMAPermission operator&(VMAPermission lhs, VMAPermission rhs) { - return static_cast<VMAPermission>(u32(lhs) & u32(rhs)); -} - -constexpr VMAPermission operator^(VMAPermission lhs, VMAPermission rhs) { - return static_cast<VMAPermission>(u32(lhs) ^ u32(rhs)); -} - -constexpr VMAPermission operator~(VMAPermission permission) { - return static_cast<VMAPermission>(~u32(permission)); -} - -constexpr VMAPermission& operator|=(VMAPermission& lhs, VMAPermission rhs) { - lhs = lhs | rhs; - return lhs; -} - -constexpr VMAPermission& operator&=(VMAPermission& lhs, VMAPermission rhs) { - lhs = lhs & rhs; - return lhs; -} - -constexpr VMAPermission& operator^=(VMAPermission& lhs, VMAPermission rhs) { - lhs = lhs ^ rhs; - return lhs; -} - -/// Attribute flags that can be applied to a VMA -enum class MemoryAttribute : u32 { - Mask = 0xFF, - - /// No particular qualities - None = 0, - /// Memory locked/borrowed for use. e.g. This would be used by transfer memory. - Locked = 1, - /// Memory locked for use by IPC-related internals. - LockedForIPC = 2, - /// Mapped as part of the device address space. - DeviceMapped = 4, - /// Uncached memory - Uncached = 8, - - IpcAndDeviceMapped = LockedForIPC | DeviceMapped, -}; - -constexpr MemoryAttribute operator|(MemoryAttribute lhs, MemoryAttribute rhs) { - return static_cast<MemoryAttribute>(u32(lhs) | u32(rhs)); -} - -constexpr MemoryAttribute operator&(MemoryAttribute lhs, MemoryAttribute rhs) { - return static_cast<MemoryAttribute>(u32(lhs) & u32(rhs)); -} - -constexpr MemoryAttribute operator^(MemoryAttribute lhs, MemoryAttribute rhs) { - return static_cast<MemoryAttribute>(u32(lhs) ^ u32(rhs)); -} - -constexpr MemoryAttribute operator~(MemoryAttribute attribute) { - return static_cast<MemoryAttribute>(~u32(attribute)); -} - -constexpr MemoryAttribute& operator|=(MemoryAttribute& lhs, MemoryAttribute rhs) { - lhs = lhs | rhs; - return lhs; -} - -constexpr MemoryAttribute& operator&=(MemoryAttribute& lhs, MemoryAttribute rhs) { - lhs = lhs & rhs; - return lhs; -} - -constexpr MemoryAttribute& operator^=(MemoryAttribute& lhs, MemoryAttribute rhs) { - lhs = lhs ^ rhs; - return lhs; -} - -constexpr u32 ToSvcMemoryAttribute(MemoryAttribute attribute) { - return static_cast<u32>(attribute & MemoryAttribute::Mask); -} - -// clang-format off -/// Represents memory states and any relevant flags, as used by the kernel. -/// svcQueryMemory interprets these by masking away all but the first eight -/// bits when storing memory state into a MemoryInfo instance. -enum class MemoryState : u32 { - Mask = 0xFF, - FlagProtect = 1U << 8, - FlagDebug = 1U << 9, - FlagIPC0 = 1U << 10, - FlagIPC3 = 1U << 11, - FlagIPC1 = 1U << 12, - FlagMapped = 1U << 13, - FlagCode = 1U << 14, - FlagAlias = 1U << 15, - FlagModule = 1U << 16, - FlagTransfer = 1U << 17, - FlagQueryPhysicalAddressAllowed = 1U << 18, - FlagSharedDevice = 1U << 19, - FlagSharedDeviceAligned = 1U << 20, - FlagIPCBuffer = 1U << 21, - FlagMemoryPoolAllocated = 1U << 22, - FlagMapProcess = 1U << 23, - FlagUncached = 1U << 24, - FlagCodeMemory = 1U << 25, - - // Wildcard used in range checking to indicate all states. - All = 0xFFFFFFFF, - - // Convenience flag sets to reduce repetition - IPCFlags = FlagIPC0 | FlagIPC3 | FlagIPC1, - - CodeFlags = FlagDebug | IPCFlags | FlagMapped | FlagCode | FlagQueryPhysicalAddressAllowed | - FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated, - - DataFlags = FlagProtect | IPCFlags | FlagMapped | FlagAlias | FlagTransfer | - FlagQueryPhysicalAddressAllowed | FlagSharedDevice | FlagSharedDeviceAligned | - FlagMemoryPoolAllocated | FlagIPCBuffer | FlagUncached, - - Unmapped = 0x00, - Io = 0x01 | FlagMapped, - Normal = 0x02 | FlagMapped | FlagQueryPhysicalAddressAllowed, - Code = 0x03 | CodeFlags | FlagMapProcess, - CodeData = 0x04 | DataFlags | FlagMapProcess | FlagCodeMemory, - Heap = 0x05 | DataFlags | FlagCodeMemory, - Shared = 0x06 | FlagMapped | FlagMemoryPoolAllocated, - ModuleCode = 0x08 | CodeFlags | FlagModule | FlagMapProcess, - ModuleCodeData = 0x09 | DataFlags | FlagModule | FlagMapProcess | FlagCodeMemory, - - IpcBuffer0 = 0x0A | FlagMapped | FlagQueryPhysicalAddressAllowed | FlagMemoryPoolAllocated | - IPCFlags | FlagSharedDevice | FlagSharedDeviceAligned, - - Stack = 0x0B | FlagMapped | IPCFlags | FlagQueryPhysicalAddressAllowed | - FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated, - - ThreadLocal = 0x0C | FlagMapped | FlagMemoryPoolAllocated, - - TransferMemoryIsolated = 0x0D | IPCFlags | FlagMapped | FlagQueryPhysicalAddressAllowed | - FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated | - FlagUncached, - - TransferMemory = 0x0E | FlagIPC3 | FlagIPC1 | FlagMapped | FlagQueryPhysicalAddressAllowed | - FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated, - - ProcessMemory = 0x0F | FlagIPC3 | FlagIPC1 | FlagMapped | FlagMemoryPoolAllocated, - - // Used to signify an inaccessible or invalid memory region with memory queries - Inaccessible = 0x10, - - IpcBuffer1 = 0x11 | FlagIPC3 | FlagIPC1 | FlagMapped | FlagQueryPhysicalAddressAllowed | - FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated, - - IpcBuffer3 = 0x12 | FlagIPC3 | FlagMapped | FlagQueryPhysicalAddressAllowed | - FlagSharedDeviceAligned | FlagMemoryPoolAllocated, - - KernelStack = 0x13 | FlagMapped, -}; -// clang-format on - -constexpr MemoryState operator|(MemoryState lhs, MemoryState rhs) { - return static_cast<MemoryState>(u32(lhs) | u32(rhs)); -} - -constexpr MemoryState operator&(MemoryState lhs, MemoryState rhs) { - return static_cast<MemoryState>(u32(lhs) & u32(rhs)); -} - -constexpr MemoryState operator^(MemoryState lhs, MemoryState rhs) { - return static_cast<MemoryState>(u32(lhs) ^ u32(rhs)); -} - -constexpr MemoryState operator~(MemoryState lhs) { - return static_cast<MemoryState>(~u32(lhs)); -} - -constexpr MemoryState& operator|=(MemoryState& lhs, MemoryState rhs) { - lhs = lhs | rhs; - return lhs; -} - -constexpr MemoryState& operator&=(MemoryState& lhs, MemoryState rhs) { - lhs = lhs & rhs; - return lhs; -} - -constexpr MemoryState& operator^=(MemoryState& lhs, MemoryState rhs) { - lhs = lhs ^ rhs; - return lhs; -} - -constexpr u32 ToSvcMemoryState(MemoryState state) { - return static_cast<u32>(state & MemoryState::Mask); -} - -struct MemoryInfo { - u64 base_address; - u64 size; - u32 state; - u32 attributes; - u32 permission; - u32 ipc_ref_count; - u32 device_ref_count; -}; -static_assert(sizeof(MemoryInfo) == 0x28, "MemoryInfo has incorrect size."); - -struct PageInfo { - u32 flags; -}; - -/** - * Represents a VMA in an address space. A VMA is a contiguous region of virtual addressing space - * with homogeneous attributes across its extents. In this particular implementation each VMA is - * also backed by a single host memory allocation. - */ -struct VirtualMemoryArea { - /// Gets the starting (base) address of this VMA. - VAddr StartAddress() const { - return base; - } - - /// Gets the ending address of this VMA. - VAddr EndAddress() const { - return base + size - 1; - } - - /// Virtual base address of the region. - VAddr base = 0; - /// Size of the region. - u64 size = 0; - - VMAType type = VMAType::Free; - VMAPermission permissions = VMAPermission::None; - MemoryState state = MemoryState::Unmapped; - MemoryAttribute attribute = MemoryAttribute::None; - - // Settings for type = AllocatedMemoryBlock - /// Memory block backing this VMA. - std::shared_ptr<PhysicalMemory> backing_block = nullptr; - /// Offset into the backing_memory the mapping starts from. - std::size_t offset = 0; - - // Settings for type = BackingMemory - /// Pointer backing this VMA. It will not be destroyed or freed when the VMA is removed. - u8* backing_memory = nullptr; - - // Settings for type = MMIO - /// Physical address of the register area this VMA maps to. - PAddr paddr = 0; - Common::MemoryHookPointer mmio_handler = nullptr; - - /// Tests if this area can be merged to the right with `next`. - bool CanBeMergedWith(const VirtualMemoryArea& next) const; -}; - -/** - * Manages a process' virtual addressing space. This class maintains a list of allocated and free - * regions in the address space, along with their attributes, and allows kernel clients to - * manipulate it, adjusting the page table to match. - * - * This is similar in idea and purpose to the VM manager present in operating system kernels, with - * the main difference being that it doesn't have to support swapping or memory mapping of files. - * The implementation is also simplified by not having to allocate page frames. See these articles - * about the Linux kernel for an explantion of the concept and implementation: - * - http://duartes.org/gustavo/blog/post/how-the-kernel-manages-your-memory/ - * - http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/ - */ -class VMManager final { - using VMAMap = std::map<VAddr, VirtualMemoryArea>; - -public: - using VMAHandle = VMAMap::const_iterator; - - explicit VMManager(Core::System& system); - ~VMManager(); - - /// Clears the address space map, re-initializing with a single free area. - void Reset(FileSys::ProgramAddressSpaceType type); - - /// Finds the VMA in which the given address is included in, or `vma_map.end()`. - VMAHandle FindVMA(VAddr target) const; - - /// Indicates whether or not the given handle is within the VMA map. - bool IsValidHandle(VMAHandle handle) const; - - // TODO(yuriks): Should these functions actually return the handle? - - /** - * Maps part of a ref-counted block of memory at a given address. - * - * @param target The guest address to start the mapping at. - * @param block The block to be mapped. - * @param offset Offset into `block` to map from. - * @param size Size of the mapping. - * @param state MemoryState tag to attach to the VMA. - */ - ResultVal<VMAHandle> MapMemoryBlock(VAddr target, std::shared_ptr<PhysicalMemory> block, - std::size_t offset, u64 size, MemoryState state, - VMAPermission perm = VMAPermission::ReadWrite); - - /** - * Maps an unmanaged host memory pointer at a given address. - * - * @param target The guest address to start the mapping at. - * @param memory The memory to be mapped. - * @param size Size of the mapping. - * @param state MemoryState tag to attach to the VMA. - */ - ResultVal<VMAHandle> MapBackingMemory(VAddr target, u8* memory, u64 size, MemoryState state); - - /** - * Finds the first free memory region of the given size within - * the user-addressable ASLR memory region. - * - * @param size The size of the desired region in bytes. - * - * @returns If successful, the base address of the free region with - * the given size. - */ - ResultVal<VAddr> FindFreeRegion(u64 size) const; - - /** - * Finds the first free address range that can hold a region of the desired size - * - * @param begin The starting address of the range. - * This is treated as an inclusive beginning address. - * - * @param end The ending address of the range. - * This is treated as an exclusive ending address. - * - * @param size The size of the free region to attempt to locate, - * in bytes. - * - * @returns If successful, the base address of the free region with - * the given size. - * - * @returns If unsuccessful, a result containing an error code. - * - * @pre The starting address must be less than the ending address. - * @pre The size must not exceed the address range itself. - */ - ResultVal<VAddr> FindFreeRegion(VAddr begin, VAddr end, u64 size) const; - - /** - * Maps a memory-mapped IO region at a given address. - * - * @param target The guest address to start the mapping at. - * @param paddr The physical address where the registers are present. - * @param size Size of the mapping. - * @param state MemoryState tag to attach to the VMA. - * @param mmio_handler The handler that will implement read and write for this MMIO region. - */ - ResultVal<VMAHandle> MapMMIO(VAddr target, PAddr paddr, u64 size, MemoryState state, - Common::MemoryHookPointer mmio_handler); - - /// Unmaps a range of addresses, splitting VMAs as necessary. - ResultCode UnmapRange(VAddr target, u64 size); - - /// Changes the permissions of the given VMA. - VMAHandle Reprotect(VMAHandle vma, VMAPermission new_perms); - - /// Changes the permissions of a range of addresses, splitting VMAs as necessary. - ResultCode ReprotectRange(VAddr target, u64 size, VMAPermission new_perms); - - ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state); - - /// Attempts to allocate a heap with the given size. - /// - /// @param size The size of the heap to allocate in bytes. - /// - /// @note If a heap is currently allocated, and this is called - /// with a size that is equal to the size of the current heap, - /// then this function will do nothing and return the current - /// heap's starting address, as there's no need to perform - /// any additional heap allocation work. - /// - /// @note If a heap is currently allocated, and this is called - /// with a size less than the current heap's size, then - /// this function will attempt to shrink the heap. - /// - /// @note If a heap is currently allocated, and this is called - /// with a size larger than the current heap's size, then - /// this function will attempt to extend the size of the heap. - /// - /// @returns A result indicating either success or failure. - /// <p> - /// If successful, this function will return a result - /// containing the starting address to the allocated heap. - /// <p> - /// If unsuccessful, this function will return a result - /// containing an error code. - /// - /// @pre The given size must lie within the allowable heap - /// memory region managed by this VMManager instance. - /// Failure to abide by this will result in ERR_OUT_OF_MEMORY - /// being returned as the result. - /// - ResultVal<VAddr> SetHeapSize(u64 size); - - /// Maps memory at a given address. - /// - /// @param target The virtual address to map memory at. - /// @param size The amount of memory to map. - /// - /// @note The destination address must lie within the Map region. - /// - /// @note This function requires that SystemResourceSize be non-zero, - /// however, this is just because if it were not then the - /// resulting page tables could be exploited on hardware by - /// a malicious program. SystemResource usage does not need - /// to be explicitly checked or updated here. - ResultCode MapPhysicalMemory(VAddr target, u64 size); - - /// Unmaps memory at a given address. - /// - /// @param target The virtual address to unmap memory at. - /// @param size The amount of memory to unmap. - /// - /// @note The destination address must lie within the Map region. - /// - /// @note This function requires that SystemResourceSize be non-zero, - /// however, this is just because if it were not then the - /// resulting page tables could be exploited on hardware by - /// a malicious program. SystemResource usage does not need - /// to be explicitly checked or updated here. - ResultCode UnmapPhysicalMemory(VAddr target, u64 size); - - /// Maps a region of memory as code memory. - /// - /// @param dst_address The base address of the region to create the aliasing memory region. - /// @param src_address The base address of the region to be aliased. - /// @param size The total amount of memory to map in bytes. - /// - /// @pre Both memory regions lie within the actual addressable address space. - /// - /// @post After this function finishes execution, assuming success, then the address range - /// [dst_address, dst_address+size) will alias the memory region, - /// [src_address, src_address+size). - /// <p> - /// What this also entails is as follows: - /// 1. The aliased region gains the Locked memory attribute. - /// 2. The aliased region becomes read-only. - /// 3. The aliasing region becomes read-only. - /// 4. The aliasing region is created with a memory state of MemoryState::CodeModule. - /// - ResultCode MapCodeMemory(VAddr dst_address, VAddr src_address, u64 size); - - /// Unmaps a region of memory designated as code module memory. - /// - /// @param dst_address The base address of the memory region aliasing the source memory region. - /// @param src_address The base address of the memory region being aliased. - /// @param size The size of the memory region to unmap in bytes. - /// - /// @pre Both memory ranges lie within the actual addressable address space. - /// - /// @pre The memory region being unmapped has been previously been mapped - /// by a call to MapCodeMemory. - /// - /// @post After execution of the function, if successful. the aliasing memory region - /// will be unmapped and the aliased region will have various traits about it - /// restored to what they were prior to the original mapping call preceding - /// this function call. - /// <p> - /// What this also entails is as follows: - /// 1. The state of the memory region will now indicate a general heap region. - /// 2. All memory attributes for the memory region are cleared. - /// 3. Memory permissions for the region are restored to user read/write. - /// - ResultCode UnmapCodeMemory(VAddr dst_address, VAddr src_address, u64 size); - - /// Queries the memory manager for information about the given address. - /// - /// @param address The address to query the memory manager about for information. - /// - /// @return A MemoryInfo instance containing information about the given address. - /// - MemoryInfo QueryMemory(VAddr address) const; - - /// Sets an attribute across the given address range. - /// - /// @param address The starting address - /// @param size The size of the range to set the attribute on. - /// @param mask The attribute mask - /// @param attribute The attribute to set across the given address range - /// - /// @returns RESULT_SUCCESS if successful - /// @returns ERR_INVALID_ADDRESS_STATE if the attribute could not be set. - /// - ResultCode SetMemoryAttribute(VAddr address, u64 size, MemoryAttribute mask, - MemoryAttribute attribute); - - /** - * Scans all VMAs and updates the page table range of any that use the given vector as backing - * memory. This should be called after any operation that causes reallocation of the vector. - */ - void RefreshMemoryBlockMappings(const PhysicalMemory* block); - - /// Dumps the address space layout to the log, for debugging - void LogLayout() const; - - /// Gets the total memory usage, used by svcGetInfo - u64 GetTotalPhysicalMemoryAvailable() const; - - /// Gets the address space base address - VAddr GetAddressSpaceBaseAddress() const; - - /// Gets the address space end address - VAddr GetAddressSpaceEndAddress() const; - - /// Gets the total address space address size in bytes - u64 GetAddressSpaceSize() const; - - /// Gets the address space width in bits. - u64 GetAddressSpaceWidth() const; - - /// Determines whether or not the given address range lies within the address space. - bool IsWithinAddressSpace(VAddr address, u64 size) const; - - /// Gets the base address of the ASLR region. - VAddr GetASLRRegionBaseAddress() const; - - /// Gets the end address of the ASLR region. - VAddr GetASLRRegionEndAddress() const; - - /// Gets the size of the ASLR region - u64 GetASLRRegionSize() const; - - /// Determines whether or not the specified address range is within the ASLR region. - bool IsWithinASLRRegion(VAddr address, u64 size) const; - - /// Gets the base address of the code region. - VAddr GetCodeRegionBaseAddress() const; - - /// Gets the end address of the code region. - VAddr GetCodeRegionEndAddress() const; - - /// Gets the total size of the code region in bytes. - u64 GetCodeRegionSize() const; - - /// Determines whether or not the specified range is within the code region. - bool IsWithinCodeRegion(VAddr address, u64 size) const; - - /// Gets the base address of the heap region. - VAddr GetHeapRegionBaseAddress() const; - - /// Gets the end address of the heap region; - VAddr GetHeapRegionEndAddress() const; - - /// Gets the total size of the heap region in bytes. - u64 GetHeapRegionSize() const; - - /// Gets the total size of the current heap in bytes. - /// - /// @note This is the current allocated heap size, not the size - /// of the region it's allowed to exist within. - /// - u64 GetCurrentHeapSize() const; - - /// Determines whether or not the specified range is within the heap region. - bool IsWithinHeapRegion(VAddr address, u64 size) const; - - /// Gets the base address of the map region. - VAddr GetMapRegionBaseAddress() const; - - /// Gets the end address of the map region. - VAddr GetMapRegionEndAddress() const; - - /// Gets the total size of the map region in bytes. - u64 GetMapRegionSize() const; - - /// Determines whether or not the specified range is within the map region. - bool IsWithinMapRegion(VAddr address, u64 size) const; - - /// Gets the base address of the stack region. - VAddr GetStackRegionBaseAddress() const; - - /// Gets the end address of the stack region. - VAddr GetStackRegionEndAddress() const; - - /// Gets the total size of the stack region in bytes. - u64 GetStackRegionSize() const; - - /// Determines whether or not the given address range is within the stack region - bool IsWithinStackRegion(VAddr address, u64 size) const; - - /// Gets the base address of the TLS IO region. - VAddr GetTLSIORegionBaseAddress() const; - - /// Gets the end address of the TLS IO region. - VAddr GetTLSIORegionEndAddress() const; - - /// Gets the total size of the TLS IO region in bytes. - u64 GetTLSIORegionSize() const; - - /// Determines if the given address range is within the TLS IO region. - bool IsWithinTLSIORegion(VAddr address, u64 size) const; - - /// Each VMManager has its own page table, which is set as the main one when the owning process - /// is scheduled. - Common::PageTable page_table{Memory::PAGE_BITS}; - - using CheckResults = ResultVal<std::tuple<MemoryState, VMAPermission, MemoryAttribute>>; - - /// Checks if an address range adheres to the specified states provided. - /// - /// @param address The starting address of the address range. - /// @param size The size of the address range. - /// @param state_mask The memory state mask. - /// @param state The state to compare the individual VMA states against, - /// which is done in the form of: (vma.state & state_mask) != state. - /// @param permission_mask The memory permissions mask. - /// @param permissions The permission to compare the individual VMA permissions against, - /// which is done in the form of: - /// (vma.permission & permission_mask) != permission. - /// @param attribute_mask The memory attribute mask. - /// @param attribute The memory attributes to compare the individual VMA attributes - /// against, which is done in the form of: - /// (vma.attributes & attribute_mask) != attribute. - /// @param ignore_mask The memory attributes to ignore during the check. - /// - /// @returns If successful, returns a tuple containing the memory attributes - /// (with ignored bits specified by ignore_mask unset), memory permissions, and - /// memory state across the memory range. - /// @returns If not successful, returns ERR_INVALID_ADDRESS_STATE. - /// - CheckResults CheckRangeState(VAddr address, u64 size, MemoryState state_mask, MemoryState state, - VMAPermission permission_mask, VMAPermission permissions, - MemoryAttribute attribute_mask, MemoryAttribute attribute, - MemoryAttribute ignore_mask) const; - -private: - using VMAIter = VMAMap::iterator; - - /// Converts a VMAHandle to a mutable VMAIter. - VMAIter StripIterConstness(const VMAHandle& iter); - - /// Unmaps the given VMA. - VMAIter Unmap(VMAIter vma); - - /** - * Carves a VMA of a specific size at the specified address by splitting Free VMAs while doing - * the appropriate error checking. - */ - ResultVal<VMAIter> CarveVMA(VAddr base, u64 size); - - /** - * Splits the edges of the given range of non-Free VMAs so that there is a VMA split at each - * end of the range. - */ - ResultVal<VMAIter> CarveVMARange(VAddr base, u64 size); - - /** - * Splits a VMA in two, at the specified offset. - * @returns the right side of the split, with the original iterator becoming the left side. - */ - VMAIter SplitVMA(VMAIter vma, u64 offset_in_vma); - - /** - * Checks for and merges the specified VMA with adjacent ones if possible. - * @returns the merged VMA or the original if no merging was possible. - */ - VMAIter MergeAdjacent(VMAIter vma); - - /** - * Merges two adjacent VMAs. - */ - void MergeAdjacentVMA(VirtualMemoryArea& left, const VirtualMemoryArea& right); - - /// Updates the pages corresponding to this VMA so they match the VMA's attributes. - void UpdatePageTableForVMA(const VirtualMemoryArea& vma); - - /// Initializes memory region ranges to adhere to a given address space type. - void InitializeMemoryRegionRanges(FileSys::ProgramAddressSpaceType type); - - /// Clears the underlying map and page table. - void Clear(); - - /// Clears out the VMA map, unmapping any previously mapped ranges. - void ClearVMAMap(); - - /// Clears out the page table - void ClearPageTable(); - - /// Gets the amount of memory currently mapped (state != Unmapped) in a range. - ResultVal<std::size_t> SizeOfAllocatedVMAsInRange(VAddr address, std::size_t size) const; - - /// Gets the amount of memory unmappable by UnmapPhysicalMemory in a range. - ResultVal<std::size_t> SizeOfUnmappablePhysicalMemoryInRange(VAddr address, - std::size_t size) const; - - /** - * A map covering the entirety of the managed address space, keyed by the `base` field of each - * VMA. It must always be modified by splitting or merging VMAs, so that the invariant - * `elem.base + elem.size == next.base` is preserved, and mergeable regions must always be - * merged when possible so that no two similar and adjacent regions exist that have not been - * merged. - */ - VMAMap vma_map; - - u32 address_space_width = 0; - VAddr address_space_base = 0; - VAddr address_space_end = 0; - - VAddr aslr_region_base = 0; - VAddr aslr_region_end = 0; - - VAddr code_region_base = 0; - VAddr code_region_end = 0; - - VAddr heap_region_base = 0; - VAddr heap_region_end = 0; - - VAddr map_region_base = 0; - VAddr map_region_end = 0; - - VAddr stack_region_base = 0; - VAddr stack_region_end = 0; - - VAddr tls_io_region_base = 0; - VAddr tls_io_region_end = 0; - - // Memory used to back the allocations in the regular heap. A single vector is used to cover - // the entire virtual address space extents that bound the allocations, including any holes. - // This makes deallocation and reallocation of holes fast and keeps process memory contiguous - // in the emulator address space, allowing Memory::GetPointer to be reasonably safe. - std::shared_ptr<PhysicalMemory> heap_memory; - - // The end of the currently allocated heap. This is not an inclusive - // end of the range. This is essentially 'base_address + current_size'. - VAddr heap_end = 0; - - // The current amount of memory mapped via MapPhysicalMemory. - // This is used here (and in Nintendo's kernel) only for debugging, and does not impact - // any behavior. - u64 physical_memory_mapped = 0; - - Core::System& system; -}; -} // namespace Kernel |