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suyu/src/core/hle/kernel/vm_manager.cpp
Lioncash 0af3b4d9f4
kernel/vm_manager: Remove redundant Reset call in destructor 
This is performing more work than would otherwise be necessary during
VMManager's destruction. All we actually want to occur in this scenario
is for any allocated memory to be freed, which will happen automatically
as the VMManager instance goes out of scope.

Anything else being done is simply unnecessary work.
2019-06-12 16:10:00 -04:00

905 lines
31 KiB
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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <iterator>
#include <utility>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/memory_hook.h"
#include "core/arm/arm_interface.h"
#include "core/core.h"
#include "core/file_sys/program_metadata.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/memory.h"
#include "core/memory_setup.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 (type == VMAType::AllocatedMemoryBlock &&
(backing_block != next.backing_block || offset + size != next.offset)) {
return false;
}
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<std::vector<u8>> block,
std::size_t offset, u64 size,
MemoryState state) {
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);
system.ArmInterface(0).MapBackingMemory(target, size, block->data() + offset,
VMAPermission::ReadWriteExecute);
system.ArmInterface(1).MapBackingMemory(target, size, block->data() + offset,
VMAPermission::ReadWriteExecute);
system.ArmInterface(2).MapBackingMemory(target, size, block->data() + offset,
VMAPermission::ReadWriteExecute);
system.ArmInterface(3).MapBackingMemory(target, size, block->data() + offset,
VMAPermission::ReadWriteExecute);
final_vma.type = VMAType::AllocatedMemoryBlock;
final_vma.permissions = VMAPermission::ReadWrite;
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);
system.ArmInterface(0).MapBackingMemory(target, size, memory, VMAPermission::ReadWriteExecute);
system.ArmInterface(1).MapBackingMemory(target, size, memory, VMAPermission::ReadWriteExecute);
system.ArmInterface(2).MapBackingMemory(target, size, memory, VMAPermission::ReadWriteExecute);
system.ArmInterface(3).MapBackingMemory(target, size, memory, VMAPermission::ReadWriteExecute);
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 {
// Find the first Free VMA.
const VAddr base = GetASLRRegionBaseAddress();
const VMAHandle vma_handle = std::find_if(vma_map.begin(), vma_map.end(), [&](const auto& vma) {
if (vma.second.type != VMAType::Free)
return false;
const VAddr vma_end = vma.second.base + vma.second.size;
return vma_end > base && vma_end >= base + size;
});
if (vma_handle == vma_map.end()) {
// TODO(Subv): Find the correct error code here.
return ResultCode(-1);
}
const VAddr target = std::max(base, 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);
system.ArmInterface(0).UnmapMemory(target, size);
system.ArmInterface(1).UnmapMemory(target, size);
system.ArmInterface(2).UnmapMemory(target, size);
system.ArmInterface(3).UnmapMemory(target, 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<std::vector<u8>>(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.
const u64 old_heap_size = GetCurrentHeapSize();
if (size > old_heap_size) {
const u64 alloc_size = size - old_heap_size;
heap_memory->insert(heap_memory->end(), alloc_size, 0);
RefreshMemoryBlockMappings(heap_memory.get());
} else if (size < old_heap_size) {
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::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;
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<std::vector<u8>>& 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
Reprotect(vma, VMAPermission::None);
return RESULT_SUCCESS;
}
void VMManager::RefreshMemoryBlockMappings(const std::vector<u8>* 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)) {
iter->second.size += next_vma->second.size;
vma_map.erase(next_vma);
}
if (iter != vma_map.begin()) {
VMAIter prev_vma = std::prev(iter);
if (prev_vma->second.CanBeMergedWith(iter->second)) {
prev_vma->second.size += iter->second.size;
vma_map.erase(iter);
iter = prev_vma;
}
}
return iter;
}
void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
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->data() + 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 new_map_region_size = 0;
u64 tls_io_region_size = 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;
}
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;
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;
new_map_region_size = 0x80000000;
tls_io_region_size = 0x1000000000;
break;
default:
UNREACHABLE_MSG("Invalid address space type specified: {}", static_cast<u32>(type));
return;
}
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;
new_map_region_base = heap_region_end;
new_map_region_end = new_map_region_base + new_map_region_size;
tls_io_region_base = new_map_region_end;
tls_io_region_end = tls_io_region_base + tls_io_region_size;
if (new_map_region_size == 0) {
new_map_region_base = address_space_base;
new_map_region_end = address_space_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));
}
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::GetNewMapRegionBaseAddress() const {
return new_map_region_base;
}
VAddr VMManager::GetNewMapRegionEndAddress() const {
return new_map_region_end;
}
u64 VMManager::GetNewMapRegionSize() const {
return new_map_region_end - new_map_region_base;
}
bool VMManager::IsWithinNewMapRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetNewMapRegionBaseAddress(),
GetNewMapRegionEndAddress());
}
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
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