diff options
| -rw-r--r-- | src/core/hle/kernel/shared_memory.cpp | 50 | ||||
| -rw-r--r-- | src/core/hle/kernel/shared_memory.h | 6 | ||||
| -rw-r--r-- | src/core/hle/result.h | 1 | ||||
| -rw-r--r-- | src/core/hle/svc.cpp | 2 |
4 files changed, 50 insertions, 9 deletions
diff --git a/src/core/hle/kernel/shared_memory.cpp b/src/core/hle/kernel/shared_memory.cpp index 6f731f317..c1e0e556b 100644 --- a/src/core/hle/kernel/shared_memory.cpp +++ b/src/core/hle/kernel/shared_memory.cpp @@ -46,6 +46,7 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u Kernel::g_current_process->vm_manager.RefreshMemoryBlockMappings(linheap_memory.get()); } } else { + // TODO(Subv): What happens if an application tries to create multiple memory blocks pointing to the same address? auto& vm_manager = shared_memory->owner_process->vm_manager; // The memory is already available and mapped in the owner process. auto vma = vm_manager.FindVMA(address)->second; @@ -56,6 +57,8 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u vm_manager.UnmapRange(address, size); // Map our own block into the address space vm_manager.MapMemoryBlock(address, shared_memory->backing_block, 0, size, MemoryState::Shared); + // Reprotect the block with the new permissions + vm_manager.ReprotectRange(address, size, ConvertPermissions(permissions)); } shared_memory->base_address = address; @@ -65,8 +68,28 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermission permissions, MemoryPermission other_permissions) { - // TODO(Subv): Return E0E01BEE when permissions and other_permissions don't - // match what was specified when the memory block was created. + MemoryPermission own_other_permissions = target_process == owner_process ? this->permissions : this->other_permissions; + + // Automatically allocated memory blocks can only be mapped with other_permissions = DontCare + if (base_address == 0 && other_permissions != MemoryPermission::DontCare) { + return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); + } + + // Error out if the requested permissions don't match what the creator process allows. + if (static_cast<u32>(permissions) & ~static_cast<u32>(own_other_permissions)) { + return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); + } + + // Heap-backed memory blocks can not be mapped with other_permissions = DontCare + if (base_address != 0 && other_permissions == MemoryPermission::DontCare) { + return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); + } + + // Error out if the provided permissions are not compatible with what the creator process needs. + if (other_permissions != MemoryPermission::DontCare && + static_cast<u32>(this->permissions) & ~static_cast<u32>(other_permissions)) { + return ResultCode(ErrorDescription::WrongPermission, ErrorModule::OS, ErrorSummary::WrongArgument, ErrorLevel::Permanent); + } // TODO(Subv): Check for the Shared Device Mem flag in the creator process. /*if (was_created_with_shared_device_mem && address != 0) { @@ -76,11 +99,13 @@ ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermi // TODO(Subv): The same process that created a SharedMemory object // can not map it in its own address space unless it was created with addr=0, result 0xD900182C. - if (address < Memory::HEAP_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) { - LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s, invalid address", - GetObjectId(), address, name.c_str()); - return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::OS, - ErrorSummary::InvalidArgument, ErrorLevel::Usage); + if (address != 0) { + if (address < Memory::HEAP_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) { + LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s, invalid address", + GetObjectId(), address, name.c_str()); + return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::OS, + ErrorSummary::InvalidArgument, ErrorLevel::Usage); + } } VAddr target_address = address; @@ -91,9 +116,11 @@ ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermi } // Map the memory block into the target process - target_process->vm_manager.MapMemoryBlock(target_address, backing_block, backing_block_offset, size, MemoryState::Shared); + auto result = target_process->vm_manager.MapMemoryBlock(target_address, backing_block, backing_block_offset, size, MemoryState::Shared); + if (result.Failed()) + return result.Code(); - return RESULT_SUCCESS; + return target_process->vm_manager.ReprotectRange(target_address, size, ConvertPermissions(permissions)); } ResultCode SharedMemory::Unmap(Process* target_process, VAddr address) { @@ -101,6 +128,11 @@ ResultCode SharedMemory::Unmap(Process* target_process, VAddr address) { return target_process->vm_manager.UnmapRange(address, size); } +VMAPermission SharedMemory::ConvertPermissions(MemoryPermission permission) { + u32 masked_permissions = static_cast<u32>(permission) & static_cast<u32>(MemoryPermission::ReadWriteExecute); + return static_cast<VMAPermission>(masked_permissions); +}; + u8* SharedMemory::GetPointer(u32 offset) { return backing_block->data() + backing_block_offset + offset; } diff --git a/src/core/hle/kernel/shared_memory.h b/src/core/hle/kernel/shared_memory.h index b442cb764..af145bef5 100644 --- a/src/core/hle/kernel/shared_memory.h +++ b/src/core/hle/kernel/shared_memory.h @@ -49,6 +49,12 @@ public: HandleType GetHandleType() const override { return HANDLE_TYPE; } /** + * Converts the specified MemoryPermission into the equivalent VMAPermission. + * @param permission The MemoryPermission to convert. + */ + static VMAPermission ConvertPermissions(MemoryPermission permission); + + /** * Maps a shared memory block to an address in the target process' address space * @param target_process Process on which to map the memory block. * @param address Address in system memory to map shared memory block to diff --git a/src/core/hle/result.h b/src/core/hle/result.h index 3fc1ab4ee..bfb3327ce 100644 --- a/src/core/hle/result.h +++ b/src/core/hle/result.h @@ -17,6 +17,7 @@ /// Detailed description of the error. This listing is likely incomplete. enum class ErrorDescription : u32 { Success = 0, + WrongPermission = 46, OS_InvalidBufferDescriptor = 48, WrongAddress = 53, FS_NotFound = 120, diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp index 701dffef3..3a53126c1 100644 --- a/src/core/hle/svc.cpp +++ b/src/core/hle/svc.cpp @@ -99,6 +99,7 @@ static ResultCode ControlMemory(u32* out_addr, u32 operation, u32 addr0, u32 add switch (operation & MEMOP_OPERATION_MASK) { case MEMOP_FREE: { + // TODO(Subv): What happens if an application tries to FREE a block of memory that has a SharedMemory pointing to it? if (addr0 >= Memory::HEAP_VADDR && addr0 < Memory::HEAP_VADDR_END) { ResultCode result = process.HeapFree(addr0, size); if (result.IsError()) return result; @@ -798,6 +799,7 @@ static ResultCode CreateMemoryBlock(Handle* out_handle, u32 addr, u32 size, u32 case MemoryPermission::Read: case MemoryPermission::Write: case MemoryPermission::ReadWrite: + case MemoryPermission::DontCare: return true; default: return false; |