4dc8a7da3f
This is shorter and more concise. This also removes the now-innaccurate comment, as it's not returned wholesale to svcQueryMemory anymore.
561 lines
20 KiB
C++
561 lines
20 KiB
C++
// 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 <vector>
|
|
#include "common/common_types.h"
|
|
#include "core/hle/result.h"
|
|
#include "core/memory.h"
|
|
#include "core/memory_hook.h"
|
|
|
|
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,
|
|
};
|
|
|
|
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,
|
|
};
|
|
|
|
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,
|
|
|
|
// 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,
|
|
CodeStatic = 0x03 | CodeFlags | FlagMapProcess,
|
|
CodeMutable = 0x04 | CodeFlags | FlagMapProcess | FlagCodeMemory,
|
|
Heap = 0x05 | DataFlags | FlagCodeMemory,
|
|
Shared = 0x06 | FlagMapped | FlagMemoryPoolAllocated,
|
|
ModuleCodeStatic = 0x08 | CodeFlags | FlagModule | FlagMapProcess,
|
|
ModuleCodeMutable = 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 {
|
|
/// 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<std::vector<u8>> 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;
|
|
Memory::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;
|
|
|
|
VMManager();
|
|
~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<std::vector<u8>> block,
|
|
std::size_t offset, u64 size, MemoryState state);
|
|
|
|
/**
|
|
* 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 address that can hold a region of the desired size.
|
|
*
|
|
* @param size Size of the desired region.
|
|
* @return The found free address.
|
|
*/
|
|
ResultVal<VAddr> FindFreeRegion(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,
|
|
Memory::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);
|
|
|
|
ResultVal<VAddr> HeapAllocate(VAddr target, u64 size, VMAPermission perms);
|
|
ResultCode HeapFree(VAddr target, u64 size);
|
|
|
|
ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state);
|
|
|
|
/// 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;
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/// Dumps the address space layout to the log, for debugging
|
|
void LogLayout() const;
|
|
|
|
/// Gets the total memory usage, used by svcGetInfo
|
|
u64 GetTotalMemoryUsage() const;
|
|
|
|
/// Gets the total heap usage, used by svcGetInfo
|
|
u64 GetTotalHeapUsage() 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;
|
|
|
|
/// Gets the base address of the ASLR region.
|
|
VAddr GetASLRRegionBaseAddress() const;
|
|
|
|
/// Gets the end address of the ASLR region.
|
|
VAddr GetASLRRegionEndAddress() const;
|
|
|
|
/// Determines whether or not the specified address range is within the ASLR region.
|
|
bool IsWithinASLRRegion(VAddr address, u64 size) const;
|
|
|
|
/// Gets the size of the ASLR region
|
|
u64 GetASLRRegionSize() 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;
|
|
|
|
/// 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 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;
|
|
|
|
/// Gets the base address of the new map region.
|
|
VAddr GetNewMapRegionBaseAddress() const;
|
|
|
|
/// Gets the end address of the new map region.
|
|
VAddr GetNewMapRegionEndAddress() const;
|
|
|
|
/// Gets the total size of the new map region in bytes.
|
|
u64 GetNewMapRegionSize() 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;
|
|
|
|
/// Each VMManager has its own page table, which is set as the main one when the owning process
|
|
/// is scheduled.
|
|
Memory::PageTable page_table;
|
|
|
|
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);
|
|
|
|
/// 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();
|
|
|
|
/**
|
|
* 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 new_map_region_base = 0;
|
|
VAddr new_map_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<std::vector<u8>> heap_memory;
|
|
// The left/right bounds of the address space covered by heap_memory.
|
|
VAddr heap_start = 0;
|
|
VAddr heap_end = 0;
|
|
u64 heap_used = 0;
|
|
};
|
|
} // namespace Kernel
|