diff options
Diffstat (limited to '')
| -rw-r--r-- | src/core/hle/kernel/vm_manager.h | 108 |
1 files changed, 90 insertions, 18 deletions
diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h index dfbf7a894..850a7ebc3 100644 --- a/src/core/hle/kernel/vm_manager.h +++ b/src/core/hle/kernel/vm_manager.h @@ -11,6 +11,7 @@ #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" @@ -290,7 +291,7 @@ struct VirtualMemoryArea { // Settings for type = AllocatedMemoryBlock /// Memory block backing this VMA. - std::shared_ptr<std::vector<u8>> backing_block = nullptr; + std::shared_ptr<PhysicalMemory> backing_block = nullptr; /// Offset into the backing_memory the mapping starts from. std::size_t offset = 0; @@ -348,8 +349,9 @@ public: * @param size Size of the mapping. * @param state MemoryState tag to attach to the VMA. */ - ResultVal<VMAHandle> MapMemoryBlock(VAddr target, std::shared_ptr<std::vector<u8>> block, - std::size_t offset, u64 size, MemoryState state); + 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. @@ -362,14 +364,39 @@ public: ResultVal<VMAHandle> MapBackingMemory(VAddr target, u8* memory, u64 size, MemoryState state); /** - * Finds the first free address that can hold a region of the desired size. + * Finds the first free memory region of the given size within + * the user-addressable ASLR memory region. * - * @param size Size of the desired region. - * @return The found free address. + * @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. @@ -425,6 +452,34 @@ public: /// 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. @@ -493,7 +548,7 @@ public: * 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 std::vector<u8>* block); + void RefreshMemoryBlockMappings(const PhysicalMemory* block); /// Dumps the address space layout to the log, for debugging void LogLayout() const; @@ -571,17 +626,17 @@ public: /// 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 new map region. - VAddr GetNewMapRegionBaseAddress() const; + /// Gets the base address of the stack region. + VAddr GetStackRegionBaseAddress() const; - /// Gets the end address of the new map region. - VAddr GetNewMapRegionEndAddress() const; + /// Gets the end address of the stack region. + VAddr GetStackRegionEndAddress() const; - /// Gets the total size of the new map region in bytes. - u64 GetNewMapRegionSize() 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 new map region - bool IsWithinNewMapRegion(VAddr address, u64 size) 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; @@ -632,6 +687,11 @@ private: */ 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); @@ -676,6 +736,13 @@ private: MemoryAttribute attribute_mask, MemoryAttribute attribute, MemoryAttribute ignore_mask) const; + /// 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 @@ -701,8 +768,8 @@ private: VAddr map_region_base = 0; VAddr map_region_end = 0; - VAddr new_map_region_base = 0; - VAddr new_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; @@ -711,12 +778,17 @@ private: // 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<std::vector<u8>> heap_memory; + 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 |