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// Copyright 2018 yuzu emulator team
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2017-06-04 21:52:19 -07:00
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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2017-06-08 23:52:30 -07:00
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#include <array>
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#include <functional>
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#include <memory>
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#include <optional>
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#include <string>
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#include <type_traits>
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#include <vector>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/concepts.h"
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#include "common/swap.h"
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#include "core/hle/ipc.h"
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#include "core/hle/kernel/k_auto_object.h"
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#include "core/hle/kernel/svc_common.h"
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2019-03-05 06:20:11 -08:00
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union ResultCode;
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namespace Core::Memory {
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class Memory;
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}
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2020-11-08 12:49:45 -08:00
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namespace IPC {
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class ResponseBuilder;
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}
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2017-06-06 21:20:52 -07:00
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namespace Service {
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class ServiceFrameworkBase;
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}
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namespace Kernel {
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class Domain;
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class HLERequestContext;
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class KernelCore;
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class KHandleTable;
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class KProcess;
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class KServerSession;
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class KThread;
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class KReadableEvent;
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class KSession;
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class KWritableEvent;
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class ServiceThread;
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enum class ThreadWakeupReason;
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/**
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* Interface implemented by HLE Session handlers.
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* This can be provided to a ServerSession in order to hook into several relevant events
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* (such as a new connection or a SyncRequest) so they can be implemented in the emulator.
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*/
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class SessionRequestHandler : public std::enable_shared_from_this<SessionRequestHandler> {
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public:
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SessionRequestHandler(KernelCore& kernel, const char* service_name_);
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virtual ~SessionRequestHandler();
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/**
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* Handles a sync request from the emulated application.
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* @param server_session The ServerSession that was triggered for this sync request,
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* it should be used to differentiate which client (As in ClientSession) we're answering to.
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* TODO(Subv): Use a wrapper structure to hold all the information relevant to
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* this request (ServerSession, Originator thread, Translated command buffer, etc).
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* @returns ResultCode the result code of the translate operation.
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*/
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virtual ResultCode HandleSyncRequest(Kernel::KServerSession& session,
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Kernel::HLERequestContext& context) = 0;
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/**
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* Signals that a client has just connected to this HLE handler and keeps the
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* associated ServerSession alive for the duration of the connection.
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* @param server_session Owning pointer to the ServerSession associated with the connection.
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*/
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void ClientConnected(KServerSession* session);
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/**
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* Signals that a client has just disconnected from this HLE handler and releases the
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* associated ServerSession.
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* @param server_session ServerSession associated with the connection.
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*/
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void ClientDisconnected(KServerSession* session);
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std::weak_ptr<ServiceThread> GetServiceThread() const {
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return service_thread;
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}
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protected:
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KernelCore& kernel;
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std::weak_ptr<ServiceThread> service_thread;
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};
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using SessionRequestHandlerPtr = std::shared_ptr<SessionRequestHandler>;
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/**
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* Manages the underlying HLE requests for a session, and whether (or not) the session should be
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* treated as a domain. This is managed separately from server sessions, as this state is shared
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* when objects are cloned.
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*/
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class SessionRequestManager final {
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public:
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explicit SessionRequestManager(KernelCore& kernel);
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~SessionRequestManager();
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bool IsDomain() const {
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return is_domain;
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}
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void ConvertToDomain() {
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domain_handlers = {session_handler};
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is_domain = true;
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}
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std::size_t DomainHandlerCount() const {
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return domain_handlers.size();
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}
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bool HasSessionHandler() const {
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return session_handler != nullptr;
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}
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SessionRequestHandler& SessionHandler() {
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return *session_handler;
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}
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const SessionRequestHandler& SessionHandler() const {
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return *session_handler;
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}
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void CloseDomainHandler(std::size_t index) {
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if (index < DomainHandlerCount()) {
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domain_handlers[index] = nullptr;
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} else {
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UNREACHABLE_MSG("Unexpected handler index {}", index);
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}
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}
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SessionRequestHandlerPtr DomainHandler(std::size_t index) const {
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ASSERT_MSG(index < DomainHandlerCount(), "Unexpected handler index {}", index);
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return domain_handlers.at(index);
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}
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void AppendDomainHandler(SessionRequestHandlerPtr&& handler) {
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domain_handlers.emplace_back(std::move(handler));
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}
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void SetSessionHandler(SessionRequestHandlerPtr&& handler) {
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session_handler = std::move(handler);
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}
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std::weak_ptr<ServiceThread> GetServiceThread() const {
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return session_handler->GetServiceThread();
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}
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private:
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bool is_domain{};
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SessionRequestHandlerPtr session_handler;
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std::vector<SessionRequestHandlerPtr> domain_handlers;
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private:
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KernelCore& kernel;
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std::weak_ptr<ServiceThread> service_thread;
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};
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/**
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* Class containing information about an in-flight IPC request being handled by an HLE service
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* implementation. Services should avoid using old global APIs (e.g. Kernel::GetCommandBuffer()) and
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* when possible use the APIs in this class to service the request.
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*
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* HLE handle protocol
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* ===================
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*
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* To avoid needing HLE services to keep a separate handle table, or having to directly modify the
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* requester's table, a tweaked protocol is used to receive and send handles in requests. The kernel
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* will decode the incoming handles into object pointers and insert a id in the buffer where the
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* handle would normally be. The service then calls GetIncomingHandle() with that id to get the
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* pointer to the object. Similarly, instead of inserting a handle into the command buffer, the
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* service calls AddOutgoingHandle() and stores the returned id where the handle would normally go.
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*
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* The end result is similar to just giving services their own real handle tables, but since these
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* ids are local to a specific context, it avoids requiring services to manage handles for objects
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* across multiple calls and ensuring that unneeded handles are cleaned up.
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*/
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class HLERequestContext {
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public:
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explicit HLERequestContext(KernelCore& kernel, Core::Memory::Memory& memory,
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KServerSession* session, KThread* thread);
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~HLERequestContext();
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/// Returns a pointer to the IPC command buffer for this request.
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u32* CommandBuffer() {
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return cmd_buf.data();
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}
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/**
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* Returns the session through which this request was made. This can be used as a map key to
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* access per-client data on services.
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*/
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Kernel::KServerSession* Session() {
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return server_session;
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}
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/// Populates this context with data from the requesting process/thread.
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ResultCode PopulateFromIncomingCommandBuffer(const KHandleTable& handle_table,
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u32_le* src_cmdbuf);
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/// Writes data from this context back to the requesting process/thread.
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ResultCode WriteToOutgoingCommandBuffer(KThread& requesting_thread);
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u32_le GetHipcCommand() const {
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return command;
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}
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u32_le GetTipcCommand() const {
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return static_cast<u32_le>(command_header->type.Value()) -
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static_cast<u32_le>(IPC::CommandType::TIPC_CommandRegion);
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}
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u32_le GetCommand() const {
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return command_header->IsTipc() ? GetTipcCommand() : GetHipcCommand();
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}
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bool IsTipc() const {
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return command_header->IsTipc();
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}
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IPC::CommandType GetCommandType() const {
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return command_header->type;
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}
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u64 GetPID() const {
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return pid;
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}
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u32 GetDataPayloadOffset() const {
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return data_payload_offset;
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}
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const std::vector<IPC::BufferDescriptorX>& BufferDescriptorX() const {
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return buffer_x_desciptors;
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}
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const std::vector<IPC::BufferDescriptorABW>& BufferDescriptorA() const {
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return buffer_a_desciptors;
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}
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2018-01-07 18:25:01 -08:00
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const std::vector<IPC::BufferDescriptorABW>& BufferDescriptorB() const {
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return buffer_b_desciptors;
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}
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2018-01-18 11:54:34 -08:00
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const std::vector<IPC::BufferDescriptorC>& BufferDescriptorC() const {
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return buffer_c_desciptors;
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}
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const IPC::DomainMessageHeader& GetDomainMessageHeader() const {
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return domain_message_header.value();
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}
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bool HasDomainMessageHeader() const {
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return domain_message_header.has_value();
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}
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2018-02-13 18:41:20 -08:00
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/// Helper function to read a buffer using the appropriate buffer descriptor
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std::vector<u8> ReadBuffer(std::size_t buffer_index = 0) const;
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/// Helper function to write a buffer using the appropriate buffer descriptor
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std::size_t WriteBuffer(const void* buffer, std::size_t size,
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std::size_t buffer_index = 0) const;
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2018-07-19 13:10:12 -07:00
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/* Helper function to write a buffer using the appropriate buffer descriptor
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*
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* @tparam T an arbitrary container that satisfies the
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* ContiguousContainer concept in the C++ standard library or a trivially copyable type.
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*
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* @param data The container/data to write into a buffer.
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* @param buffer_index The buffer in particular to write to.
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*/
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template <typename T, typename = std::enable_if_t<!std::is_pointer_v<T>>>
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std::size_t WriteBuffer(const T& data, std::size_t buffer_index = 0) const {
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if constexpr (Common::IsSTLContainer<T>) {
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using ContiguousType = typename T::value_type;
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static_assert(std::is_trivially_copyable_v<ContiguousType>,
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"Container to WriteBuffer must contain trivially copyable objects");
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return WriteBuffer(std::data(data), std::size(data) * sizeof(ContiguousType),
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buffer_index);
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} else {
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static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable");
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return WriteBuffer(&data, sizeof(T), buffer_index);
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}
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}
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2018-02-13 21:14:17 -08:00
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/// Helper function to get the size of the input buffer
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std::size_t GetReadBufferSize(std::size_t buffer_index = 0) const;
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2018-02-13 18:41:20 -08:00
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/// Helper function to get the size of the output buffer
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std::size_t GetWriteBufferSize(std::size_t buffer_index = 0) const;
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/// Helper function to test whether the input buffer at buffer_index can be read
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bool CanReadBuffer(std::size_t buffer_index = 0) const;
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/// Helper function to test whether the output buffer at buffer_index can be written
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bool CanWriteBuffer(std::size_t buffer_index = 0) const;
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2021-03-12 07:13:31 -08:00
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Handle GetCopyHandle(std::size_t index) const {
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2021-05-18 19:52:52 -07:00
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return incoming_copy_handles.at(index);
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2021-03-12 07:13:31 -08:00
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}
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Handle GetMoveHandle(std::size_t index) const {
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2021-05-18 19:52:52 -07:00
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return incoming_move_handles.at(index);
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2021-03-12 07:13:31 -08:00
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}
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2021-04-20 22:18:56 -07:00
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void AddMoveObject(KAutoObject* object) {
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2021-05-18 19:52:52 -07:00
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outgoing_move_objects.emplace_back(object);
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2018-01-06 22:50:55 -08:00
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}
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2021-04-20 22:18:56 -07:00
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void AddCopyObject(KAutoObject* object) {
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2021-05-18 19:52:52 -07:00
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outgoing_copy_objects.emplace_back(object);
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2018-01-06 22:50:55 -08:00
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}
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2021-05-15 23:49:03 -07:00
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void AddDomainObject(SessionRequestHandlerPtr object) {
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2021-05-18 19:52:52 -07:00
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outgoing_domain_objects.emplace_back(std::move(object));
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2018-01-06 22:50:55 -08:00
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}
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2018-04-30 20:24:31 -07:00
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template <typename T>
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2021-05-15 23:49:03 -07:00
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std::shared_ptr<T> GetDomainHandler(std::size_t index) const {
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return std::static_pointer_cast<T>(manager->DomainHandler(index));
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2018-04-30 20:24:31 -07:00
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}
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2021-05-15 23:49:03 -07:00
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void SetSessionRequestManager(std::shared_ptr<SessionRequestManager> manager_) {
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manager = std::move(manager_);
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2018-04-30 20:24:31 -07:00
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}
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2018-02-15 06:22:11 -08:00
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std::string Description() const;
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2020-12-30 23:01:08 -08:00
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KThread& GetThread() {
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2019-11-25 15:28:48 -08:00
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return *thread;
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}
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bool IsThreadWaiting() const {
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return is_thread_waiting;
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}
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2017-06-18 16:05:12 -07:00
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private:
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2020-11-08 12:49:45 -08:00
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|
friend class IPC::ResponseBuilder;
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2021-04-24 02:40:31 -07:00
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void ParseCommandBuffer(const KHandleTable& handle_table, u32_le* src_cmdbuf, bool incoming);
|
2018-10-20 11:34:41 -07:00
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2017-06-08 23:52:30 -07:00
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|
std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
|
2021-04-13 17:48:37 -07:00
|
|
|
Kernel::KServerSession* server_session{};
|
2021-04-02 18:02:10 -07:00
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|
|
KThread* thread;
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|
2021-05-18 19:52:52 -07:00
|
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|
std::vector<Handle> incoming_move_handles;
|
|
|
|
std::vector<Handle> incoming_copy_handles;
|
|
|
|
|
|
|
|
std::vector<KAutoObject*> outgoing_move_objects;
|
|
|
|
std::vector<KAutoObject*> outgoing_copy_objects;
|
|
|
|
std::vector<SessionRequestHandlerPtr> outgoing_domain_objects;
|
2017-10-14 19:18:42 -07:00
|
|
|
|
2019-03-07 13:44:28 -08:00
|
|
|
std::optional<IPC::CommandHeader> command_header;
|
|
|
|
std::optional<IPC::HandleDescriptorHeader> handle_descriptor_header;
|
|
|
|
std::optional<IPC::DataPayloadHeader> data_payload_header;
|
|
|
|
std::optional<IPC::DomainMessageHeader> domain_message_header;
|
2017-10-18 18:38:01 -07:00
|
|
|
std::vector<IPC::BufferDescriptorX> buffer_x_desciptors;
|
|
|
|
std::vector<IPC::BufferDescriptorABW> buffer_a_desciptors;
|
|
|
|
std::vector<IPC::BufferDescriptorABW> buffer_b_desciptors;
|
|
|
|
std::vector<IPC::BufferDescriptorABW> buffer_w_desciptors;
|
2018-01-18 11:54:34 -08:00
|
|
|
std::vector<IPC::BufferDescriptorC> buffer_c_desciptors;
|
2017-10-14 19:18:42 -07:00
|
|
|
|
2021-05-15 21:40:19 -07:00
|
|
|
u32_le command{};
|
|
|
|
u64 pid{};
|
2021-05-15 23:49:03 -07:00
|
|
|
u32 write_size{};
|
2021-05-08 02:21:50 -07:00
|
|
|
u32 data_payload_offset{};
|
|
|
|
u32 handles_offset{};
|
|
|
|
u32 domain_offset{};
|
2018-04-30 20:24:31 -07:00
|
|
|
|
2021-05-15 23:49:03 -07:00
|
|
|
std::shared_ptr<SessionRequestManager> manager;
|
2019-11-25 15:28:48 -08:00
|
|
|
bool is_thread_waiting{};
|
2020-05-03 09:41:30 -07:00
|
|
|
|
|
|
|
KernelCore& kernel;
|
|
|
|
Core::Memory::Memory& memory;
|
2017-06-06 21:20:52 -07:00
|
|
|
};
|
|
|
|
|
2017-06-04 21:52:19 -07:00
|
|
|
} // namespace Kernel
|