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Diffstat (limited to 'src/core/hle/kernel/vm_manager.h')
| -rw-r--r-- | src/core/hle/kernel/vm_manager.h | 796 |
1 files changed, 0 insertions, 796 deletions
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 |