diff options
Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/vm_manager.cpp | 85 |
1 files changed, 81 insertions, 4 deletions
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp index ec0a480ce..48b13cfdd 100644 --- a/src/core/hle/kernel/vm_manager.cpp +++ b/src/core/hle/kernel/vm_manager.cpp @@ -62,7 +62,7 @@ bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const { return true; } -VMManager::VMManager() { +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); @@ -111,7 +111,6 @@ ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target, VirtualMemoryArea& final_vma = vma_handle->second; ASSERT(final_vma.size == size); - auto& system = Core::System::GetInstance(); system.ArmInterface(0).MapBackingMemory(target, size, block->data() + offset, VMAPermission::ReadWriteExecute); system.ArmInterface(1).MapBackingMemory(target, size, block->data() + offset, @@ -140,7 +139,6 @@ ResultVal<VMManager::VMAHandle> VMManager::MapBackingMemory(VAddr target, u8* me VirtualMemoryArea& final_vma = vma_handle->second; ASSERT(final_vma.size == size); - auto& system = Core::System::GetInstance(); 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); @@ -223,7 +221,6 @@ ResultCode VMManager::UnmapRange(VAddr target, u64 size) { ASSERT(FindVMA(target)->second.size >= size); - auto& system = Core::System::GetInstance(); system.ArmInterface(0).UnmapMemory(target, size); system.ArmInterface(1).UnmapMemory(target, size); system.ArmInterface(2).UnmapMemory(target, size); @@ -302,6 +299,86 @@ ResultVal<VAddr> VMManager::SetHeapSize(u64 size) { 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{}; |