|
|
|
@ -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) {
|
|
|
|
@ -76,12 +99,14 @@ 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 != 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;
|
|
|
|
|
}
|
|
|
|
|