mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-22 20:31:14 +00:00
kern: partially implement Receive half of ReplyAndReceive
This commit is contained in:
Michael Scire
parent
1b2203d102
commit
84b1be1d58
5 changed files with 315 additions and 33 deletions
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@ -46,6 +46,8 @@ namespace ams::kern {
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static void PostDestroy(uintptr_t arg);
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virtual KProcess *GetOwner() const override { return this->owner; }
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KReadableEvent &GetReadableEvent() { return this->readable_event; }
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KWritableEvent &GetWritableEvent() { return this->writable_event; }
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};
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@ -155,21 +155,7 @@ namespace ams::kern {
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}
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}
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template<typename T = KAutoObject>
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ALWAYS_INLINE KScopedAutoObject<T> GetObjectForIpc(ams::svc::Handle handle) const {
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static_assert(!std::is_base_of<KInterruptEvent, T>::value);
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/* Handle pseudo-handles. */
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if constexpr (std::is_base_of<T, KProcess>::value) {
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if (handle == ams::svc::PseudoHandle::CurrentProcess) {
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return GetCurrentProcessPointer();
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}
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} else if constexpr (std::is_base_of<T, KThread>::value) {
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if (handle == ams::svc::PseudoHandle::CurrentThread) {
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return GetCurrentThreadPointer();
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}
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}
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ALWAYS_INLINE KScopedAutoObject<KAutoObject> GetObjectForIpcWithoutPseudoHandle(ams::svc::Handle handle) const {
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/* Lock and look up in table. */
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KScopedDisableDispatch dd;
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KScopedSpinLock lk(this->lock);
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@ -178,15 +164,20 @@ namespace ams::kern {
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if (obj->DynamicCast<KInterruptEvent *>() != nullptr) {
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return nullptr;
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}
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if constexpr (std::is_same<T, KAutoObject>::value) {
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return obj;
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} else {
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if (auto *obj = this->GetObjectImpl(handle); obj != nullptr) {
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return obj->DynamicCast<T*>();
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} else {
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return nullptr;
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}
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return obj;
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}
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ALWAYS_INLINE KScopedAutoObject<KAutoObject> GetObjectForIpc(ams::svc::Handle handle, KThread *cur_thread) const {
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/* Handle pseudo-handles. */
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if (handle == ams::svc::PseudoHandle::CurrentProcess) {
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return static_cast<KAutoObject *>(static_cast<void *>(cur_thread->GetOwnerProcess()));
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}
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if (handle == ams::svc::PseudoHandle::CurrentThread) {
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return static_cast<KAutoObject *>(cur_thread);
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}
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return GetObjectForIpcWithoutPseudoHandle(handle);
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}
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ALWAYS_INLINE KScopedAutoObject<KAutoObject> GetObjectByIndex(ams::svc::Handle *out_handle, size_t index) const {
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@ -128,6 +128,11 @@ namespace ams::kern {
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size_t GetSize() const { return this->size; }
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KProcess *GetServerProcess() const { return this->server; }
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void SetServerProcess(KProcess *process) {
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this->server = process;
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this->server->Open();
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}
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void ClearThread() { this->thread = nullptr; }
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void ClearEvent() { this->event = nullptr; }
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@ -17,8 +17,246 @@
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namespace ams::kern {
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namespace ipc {
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using MessageBuffer = ams::svc::ipc::MessageBuffer;
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}
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namespace {
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class ReceiveList {
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private:
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u32 data[ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountMax * ipc::MessageBuffer::ReceiveListEntry::GetDataSize() / sizeof(u32)];
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s32 recv_list_count;
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uintptr_t msg_buffer_end;
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uintptr_t msg_buffer_space_end;
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public:
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static constexpr int GetEntryCount(const ipc::MessageBuffer::MessageHeader &header) {
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const auto count = header.GetReceiveListCount();
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switch (count) {
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_None:
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return 0;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToMessageBuffer:
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return 0;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToSingleBuffer:
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return 1;
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default:
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return count - ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountOffset;
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}
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}
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public:
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ReceiveList(const u32 *dst_msg, const ipc::MessageBuffer::MessageHeader &dst_header, const ipc::MessageBuffer::SpecialHeader &dst_special_header, size_t msg_size, size_t out_offset, s32 dst_recv_list_idx) {
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this->recv_list_count = dst_header.GetReceiveListCount();
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this->msg_buffer_end = reinterpret_cast<uintptr_t>(dst_msg) + sizeof(u32) * out_offset;
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this->msg_buffer_space_end = reinterpret_cast<uintptr_t>(dst_msg) + msg_size;
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const u32 *recv_list = dst_msg + dst_recv_list_idx;
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__builtin_memcpy(this->data, recv_list, GetEntryCount(dst_header) * ipc::MessageBuffer::ReceiveListEntry::GetDataSize());
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}
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constexpr bool IsIndex() const {
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return this->recv_list_count > ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountOffset;
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}
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};
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template<bool MoveHandleAllowed>
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ALWAYS_INLINE Result ProcessMessageSpecialData(int &offset, KProcess &dst_process, KProcess &src_process, KThread &src_thread, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, const ipc::MessageBuffer::SpecialHeader &src_special_header) {
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/* Copy the special header to the destination. */
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offset = dst_msg.Set(src_special_header);
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/* Copy the process ID. */
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if (src_special_header.GetHasProcessId()) {
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/* TODO: Atmosphere mitm extension support. */
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offset = dst_msg.SetProcessId(offset, src_process.GetId());
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}
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/* Prepare to process handles. */
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auto &dst_handle_table = dst_process.GetHandleTable();
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auto &src_handle_table = src_process.GetHandleTable();
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Result result = ResultSuccess();
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/* Process copy handles. */
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for (auto i = 0; i < src_special_header.GetCopyHandleCount(); ++i) {
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/* Get the handles. */
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const ams::svc::Handle src_handle = src_msg.GetHandle(offset);
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ams::svc::Handle dst_handle = ams::svc::InvalidHandle;
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/* If we're in a success state, try to move the handle to the new table. */
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if (R_SUCCEEDED(result) && src_handle != ams::svc::InvalidHandle) {
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KScopedAutoObject obj = src_handle_table.GetObjectForIpc(src_handle, std::addressof(src_thread));
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if (obj.IsNotNull()) {
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Result add_result = dst_handle_table.Add(std::addressof(dst_handle), obj.GetPointerUnsafe());
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if (R_FAILED(add_result)) {
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result = add_result;
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dst_handle = ams::svc::InvalidHandle;
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}
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} else {
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result = svc::ResultInvalidHandle();
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}
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}
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/* Set the handle. */
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offset = dst_msg.SetHandle(offset, dst_handle);
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}
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/* Process move handles. */
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if constexpr (MoveHandleAllowed) {
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for (auto i = 0; i < src_special_header.GetMoveHandleCount(); ++i) {
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/* Get the handles. */
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const ams::svc::Handle src_handle = src_msg.GetHandle(offset);
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ams::svc::Handle dst_handle = ams::svc::InvalidHandle;
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/* Whether or not we've succeeded, we need to remove the handles from the source table. */
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if (src_handle != ams::svc::InvalidHandle) {
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if (R_SUCCEEDED(result)) {
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KScopedAutoObject obj = src_handle_table.GetObjectForIpcWithoutPseudoHandle(src_handle);
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if (obj.IsNotNull()) {
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Result add_result = dst_handle_table.Add(std::addressof(dst_handle), obj.GetPointerUnsafe());
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src_handle_table.Remove(src_handle);
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if (R_FAILED(add_result)) {
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result = add_result;
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dst_handle = ams::svc::InvalidHandle;
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}
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} else {
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result = svc::ResultInvalidHandle();
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}
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} else {
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src_handle_table.Remove(src_handle);
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}
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}
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/* Set the handle. */
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offset = dst_msg.SetHandle(offset, dst_handle);
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}
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}
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return result;
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}
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ALWAYS_INLINE Result ReceiveMessage(bool &recv_list_broken, uintptr_t dst_message_buffer, size_t dst_buffer_size, KPhysicalAddress dst_message_paddr, KThread &src_thread, uintptr_t src_message_buffer, size_t src_buffer_size, KServerSession *session, KSessionRequest *request) {
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/* Prepare variables for receive. */
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const KThread &dst_thread = GetCurrentThread();
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KProcess &dst_process = *(dst_thread.GetOwnerProcess());
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KProcess &src_process = *(src_thread.GetOwnerProcess());
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auto &dst_page_table = dst_process.GetPageTable();
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auto &src_page_table = src_process.GetPageTable();
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/* The receive list is initially not broken. */
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recv_list_broken = false;
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/* Set the server process for the request. */
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request->SetServerProcess(std::addressof(dst_process));
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/* Determine the message buffers. */
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u32 *dst_msg_ptr, *src_msg_ptr;
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bool dst_user, src_user;
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if (dst_message_buffer) {
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dst_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(dst_message_paddr));
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dst_user = true;
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} else {
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dst_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(dst_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
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dst_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
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dst_message_buffer = GetInteger(dst_thread.GetThreadLocalRegionAddress());
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dst_user = false;
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}
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if (src_message_buffer) {
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/* NOTE: Nintendo does not check the result of this GetPhysicalAddress call. */
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KPhysicalAddress src_message_paddr;
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src_page_table.GetPhysicalAddress(std::addressof(src_message_paddr), src_message_buffer);
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src_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(src_message_paddr));
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src_user = true;
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} else {
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src_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(src_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
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src_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
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src_message_buffer = GetInteger(src_thread.GetThreadLocalRegionAddress());
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src_user = false;
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}
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/* Parse the headers. */
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const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
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const ipc::MessageBuffer src_msg(src_msg_ptr, src_buffer_size);
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const ipc::MessageBuffer::MessageHeader dst_header(dst_msg);
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const ipc::MessageBuffer::MessageHeader src_header(src_msg);
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const ipc::MessageBuffer::SpecialHeader dst_special_header(dst_msg, dst_header);
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const ipc::MessageBuffer::SpecialHeader src_special_header(src_msg, src_header);
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/* Get the end of the source message. */
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const size_t src_end_offset = ipc::MessageBuffer::GetRawDataIndex(src_header, src_special_header) + src_header.GetRawCount();
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/* Ensure that the headers fit. */
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R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(dst_header, dst_special_header) <= dst_buffer_size, svc::ResultInvalidCombination());
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R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(src_header, src_special_header) <= src_buffer_size, svc::ResultInvalidCombination());
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/* Ensure the receive list offset is after the end of raw data. */
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if (dst_header.GetReceiveListOffset()) {
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R_UNLESS(dst_header.GetReceiveListOffset() >= ipc::MessageBuffer::GetRawDataIndex(dst_header, dst_special_header) + dst_header.GetRawCount(), svc::ResultInvalidCombination());
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}
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/* Ensure that the destination buffer is big enough to receive the source. */
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R_UNLESS(dst_buffer_size >= src_end_offset * sizeof(u32), svc::ResultMessageTooLarge());
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/* Get the receive list. */
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const s32 dst_recv_list_idx = static_cast<s32>(ipc::MessageBuffer::GetReceiveListIndex(dst_header, dst_special_header));
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ReceiveList dst_recv_list(dst_msg_ptr, dst_header, dst_special_header, dst_buffer_size, src_end_offset, dst_recv_list_idx);
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/* Ensure that the source special header isn't invalid. */
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const bool src_has_special_header = src_header.GetHasSpecialHeader();
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if (src_has_special_header) {
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/* Sending move handles from client -> server is not allowed. */
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R_UNLESS(src_special_header.GetMoveHandleCount() == 0, svc::ResultInvalidCombination());
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}
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/* Prepare for further processing. */
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int pointer_key = 0;
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int offset = dst_msg.Set(src_header);
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/* Set up a guard to make sure that we end up in a clean state on error. */
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auto cleanup_guard = SCOPE_GUARD {
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/* TODO */
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MESOSPHERE_UNIMPLEMENTED();
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};
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/* Process any special data. */
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if (src_header.GetHasSpecialHeader()) {
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/* After we process, make sure we track whether the receive list is broken. */
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ON_SCOPE_EXIT { if (offset > dst_recv_list_idx) { recv_list_broken = true; } };
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/* Process special data. */
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R_TRY(ProcessMessageSpecialData<false>(offset, dst_process, src_process, src_thread, dst_msg, src_msg, src_special_header));
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}
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/* Process any pointer buffers. */
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for (auto i = 0; i < src_header.GetPointerCount(); ++i) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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/* Process any map alias buffers. */
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for (auto i = 0; i < src_header.GetMapAliasCount(); ++i) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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/* Process any raw data. */
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if (src_header.GetRawCount()) {
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MESOSPHERE_UNIMPLEMENTED();
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}
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/* TODO: Remove this when done, as these variables will be used by unimplemented stuff above. */
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static_cast<void>(dst_page_table);
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static_cast<void>(dst_user);
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static_cast<void>(src_user);
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static_cast<void>(pointer_key);
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/* We succeeded! */
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cleanup_guard.Cancel();
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return ResultSuccess();
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}
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ALWAYS_INLINE void ReplyAsyncError(KProcess *to_process, uintptr_t to_msg_buf, size_t to_msg_buf_size, Result result) {
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/* Convert the buffer to a physical address. */
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KPhysicalAddress phys_addr;
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@ -28,7 +266,7 @@ namespace ams::kern {
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u32 *to_msg = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(phys_addr));
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/* Set the error. */
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ams::svc::ipc::MessageBuffer msg(to_msg, to_msg_buf_size);
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ipc::MessageBuffer msg(to_msg, to_msg_buf_size);
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msg.SetAsyncResult(result);
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}
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@ -44,8 +282,54 @@ namespace ams::kern {
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this->parent->Close();
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}
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Result KServerSession::ReceiveRequest(uintptr_t message, uintptr_t buffer_size, KPhysicalAddress message_paddr) {
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MESOSPHERE_UNIMPLEMENTED();
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Result KServerSession::ReceiveRequest(uintptr_t server_message, uintptr_t server_buffer_size, KPhysicalAddress server_message_paddr) {
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MESOSPHERE_ASSERT_THIS();
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/* Lock the session. */
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KScopedLightLock lk(this->lock);
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/* Get the request and client thread. */
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KSessionRequest *request;
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KScopedAutoObject<KThread> client_thread;
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{
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KScopedSchedulerLock sl;
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/* Ensure that we can service the request. */
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R_UNLESS(!this->parent->IsClientClosed(), svc::ResultSessionClosed());
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/* Ensure we aren't already servicing a request. */
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R_UNLESS(this->current_request == nullptr, svc::ResultNotFound());
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/* Ensure we have a request to service. */
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R_UNLESS(!this->request_list.empty(), svc::ResultNotFound());
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/* Pop the first request from the list. */
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request = std::addressof(this->request_list.front());
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this->request_list.pop_front();
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/* Get the thread for the request. */
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client_thread = KScopedAutoObject<KThread>(request->GetThread());
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R_UNLESS(client_thread.IsNotNull(), svc::ResultSessionClosed());
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}
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/* Set the request as our current. */
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this->current_request = request;
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/* Get the client address. */
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uintptr_t client_message = request->GetAddress();
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size_t client_buffer_size = request->GetSize();
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bool recv_list_broken = false;
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/* Receive the message. */
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Result result = ReceiveMessage(recv_list_broken, server_message, server_buffer_size, server_message_paddr, *client_thread.GetPointerUnsafe(), client_message, client_buffer_size, this, request);
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/* Handle cleanup on receive failure. */
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if (R_FAILED(result)) {
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/* TODO */
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MESOSPHERE_UNIMPLEMENTED();
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}
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return result;
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}
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Result KServerSession::SendReply(uintptr_t message, uintptr_t buffer_size, KPhysicalAddress message_paddr) {
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@ -439,34 +439,34 @@ namespace ams::svc::ipc {
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return index + (spc.GetHeaderSize() / sizeof(*this->buffer));
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}
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ALWAYS_INLINE s32 SetHandle(s32 index, const ::ams::svc::Handle &hnd) {
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ALWAYS_INLINE s32 SetHandle(s32 index, const ::ams::svc::Handle &hnd) const {
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static_assert(util::IsAligned(sizeof(hnd), sizeof(*this->buffer)));
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__builtin_memcpy(this->buffer + index, std::addressof(hnd), sizeof(hnd));
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return index + (sizeof(hnd) / sizeof(*this->buffer));
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}
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ALWAYS_INLINE s32 SetProcessId(s32 index, const u64 pid) {
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ALWAYS_INLINE s32 SetProcessId(s32 index, const u64 pid) const {
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static_assert(util::IsAligned(sizeof(pid), sizeof(*this->buffer)));
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__builtin_memcpy(this->buffer + index, std::addressof(pid), sizeof(pid));
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return index + (sizeof(pid) / sizeof(*this->buffer));
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}
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ALWAYS_INLINE s32 Set(s32 index, const MapAliasDescriptor &desc) {
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ALWAYS_INLINE s32 Set(s32 index, const MapAliasDescriptor &desc) const {
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__builtin_memcpy(this->buffer + index, desc.GetData(), desc.GetDataSize());
|
||||
return index + (desc.GetDataSize() / sizeof(*this->buffer));
|
||||
}
|
||||
|
||||
ALWAYS_INLINE s32 Set(s32 index, const PointerDescriptor &desc) {
|
||||
ALWAYS_INLINE s32 Set(s32 index, const PointerDescriptor &desc) const {
|
||||
__builtin_memcpy(this->buffer + index, desc.GetData(), desc.GetDataSize());
|
||||
return index + (desc.GetDataSize() / sizeof(*this->buffer));
|
||||
}
|
||||
|
||||
ALWAYS_INLINE s32 Set(s32 index, const ReceiveListEntry &desc) {
|
||||
ALWAYS_INLINE s32 Set(s32 index, const ReceiveListEntry &desc) const {
|
||||
__builtin_memcpy(this->buffer + index, desc.GetData(), desc.GetDataSize());
|
||||
return index + (desc.GetDataSize() / sizeof(*this->buffer));
|
||||
}
|
||||
|
||||
ALWAYS_INLINE s32 Set(s32 index, const u32 val) {
|
||||
ALWAYS_INLINE s32 Set(s32 index, const u32 val) const {
|
||||
static_assert(util::IsAligned(sizeof(val), sizeof(*this->buffer)));
|
||||
__builtin_memcpy(this->buffer + index, std::addressof(val), sizeof(val));
|
||||
return index + (sizeof(val) / sizeof(*this->buffer));
|
||||
|
|
@ -521,7 +521,7 @@ namespace ams::svc::ipc {
|
|||
}
|
||||
}
|
||||
|
||||
static constexpr ALWAYS_INLINE s32 GetMessageBufferSize(const MessageHeader &hdr, const SpecialHeader &spc) {
|
||||
static constexpr ALWAYS_INLINE size_t GetMessageBufferSize(const MessageHeader &hdr, const SpecialHeader &spc) {
|
||||
/* Get the size of the plain message. */
|
||||
size_t msg_size = GetReceiveListIndex(hdr, spc) * sizeof(util::BitPack32);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue