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-rw-r--r--src/core/hle/function_wrappers.h23
-rw-r--r--src/core/hle/kernel/client_session.cpp10
-rw-r--r--src/core/hle/kernel/client_session.h4
-rw-r--r--src/core/hle/kernel/server_session.cpp22
-rw-r--r--src/core/hle/kernel/server_session.h14
-rw-r--r--src/core/hle/svc.cpp111
6 files changed, 161 insertions, 23 deletions
diff --git a/src/core/hle/function_wrappers.h b/src/core/hle/function_wrappers.h
index 410bb87ea..5e6002f4e 100644
--- a/src/core/hle/function_wrappers.h
+++ b/src/core/hle/function_wrappers.h
@@ -16,9 +16,6 @@ namespace HLE {
#define PARAM(n) Core::CPU().GetReg(n)
-/// An invalid result code that is meant to be overwritten when a thread resumes from waiting
-static const ResultCode RESULT_INVALID(0xDEADC0DE);
-
/**
* HLE a function return from the current ARM11 userland process
* @param res Result to return
@@ -68,10 +65,18 @@ void Wrap() {
(PARAM(3) != 0), (((s64)PARAM(4) << 32) | PARAM(0)))
.raw;
- if (retval != RESULT_INVALID.raw) {
- Core::CPU().SetReg(1, (u32)param_1);
- FuncReturn(retval);
- }
+ Core::CPU().SetReg(1, (u32)param_1);
+ FuncReturn(retval);
+}
+
+template <ResultCode func(s32*, u32*, s32, u32)>
+void Wrap() {
+ s32 param_1 = 0;
+ u32 retval =
+ func(&param_1, (Kernel::Handle*)Memory::GetPointer(PARAM(1)), (s32)PARAM(2), PARAM(3)).raw;
+
+ Core::CPU().SetReg(1, (u32)param_1);
+ FuncReturn(retval);
}
template <ResultCode func(u32, u32, u32, u32, s64)>
@@ -92,9 +97,7 @@ template <ResultCode func(u32, s64)>
void Wrap() {
s32 retval = func(PARAM(0), (((s64)PARAM(3) << 32) | PARAM(2))).raw;
- if (retval != RESULT_INVALID.raw) {
- FuncReturn(retval);
- }
+ FuncReturn(retval);
}
template <ResultCode func(MemoryInfo*, PageInfo*, u32)>
diff --git a/src/core/hle/kernel/client_session.cpp b/src/core/hle/kernel/client_session.cpp
index fef97af1f..646a5cc64 100644
--- a/src/core/hle/kernel/client_session.cpp
+++ b/src/core/hle/kernel/client_session.cpp
@@ -9,6 +9,7 @@
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/kernel/session.h"
+#include "core/hle/kernel/thread.h"
namespace Kernel {
@@ -27,19 +28,24 @@ ClientSession::~ClientSession() {
// TODO(Subv): Force a wake up of all the ServerSession's waiting threads and set
// their WaitSynchronization result to 0xC920181A.
+
+ // Clean up the list of client threads with pending requests, they are unneeded now that the
+ // client endpoint is closed.
+ server->pending_requesting_threads.clear();
+ server->currently_handling = nullptr;
}
parent->client = nullptr;
}
-ResultCode ClientSession::SendSyncRequest() {
+ResultCode ClientSession::SendSyncRequest(SharedPtr<Thread> thread) {
// Keep ServerSession alive until we're done working with it.
SharedPtr<ServerSession> server = parent->server;
if (server == nullptr)
return ERR_SESSION_CLOSED_BY_REMOTE;
// Signal the server session that new data is available
- return server->HandleSyncRequest();
+ return server->HandleSyncRequest(std::move(thread));
}
} // namespace
diff --git a/src/core/hle/kernel/client_session.h b/src/core/hle/kernel/client_session.h
index 2de379c09..daf521529 100644
--- a/src/core/hle/kernel/client_session.h
+++ b/src/core/hle/kernel/client_session.h
@@ -14,6 +14,7 @@ namespace Kernel {
class ServerSession;
class Session;
+class Thread;
class ClientSession final : public Object {
public:
@@ -34,9 +35,10 @@ public:
/**
* Sends an SyncRequest from the current emulated thread.
+ * @param thread Thread that initiated the request.
* @return ResultCode of the operation.
*/
- ResultCode SendSyncRequest();
+ ResultCode SendSyncRequest(SharedPtr<Thread> thread);
std::string name; ///< Name of client port (optional)
diff --git a/src/core/hle/kernel/server_session.cpp b/src/core/hle/kernel/server_session.cpp
index d197137c3..337896abf 100644
--- a/src/core/hle/kernel/server_session.cpp
+++ b/src/core/hle/kernel/server_session.cpp
@@ -32,22 +32,29 @@ ResultVal<SharedPtr<ServerSession>> ServerSession::Create(std::string name) {
SharedPtr<ServerSession> server_session(new ServerSession);
server_session->name = std::move(name);
- server_session->signaled = false;
server_session->parent = nullptr;
return MakeResult(std::move(server_session));
}
bool ServerSession::ShouldWait(Thread* thread) const {
- return !signaled;
+ // Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
+ if (parent->client == nullptr)
+ return false;
+ // Wait if we have no pending requests, or if we're currently handling a request.
+ return pending_requesting_threads.empty() || currently_handling != nullptr;
}
void ServerSession::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
- signaled = false;
+ // We are now handling a request, pop it from the stack.
+ // TODO(Subv): What happens if the client endpoint is closed before any requests are made?
+ ASSERT(!pending_requesting_threads.empty());
+ currently_handling = pending_requesting_threads.back();
+ pending_requesting_threads.pop_back();
}
-ResultCode ServerSession::HandleSyncRequest() {
+ResultCode ServerSession::HandleSyncRequest(SharedPtr<Thread> thread) {
// The ServerSession received a sync request, this means that there's new data available
// from its ClientSession, so wake up any threads that may be waiting on a svcReplyAndReceive or
// similar.
@@ -60,11 +67,14 @@ ResultCode ServerSession::HandleSyncRequest() {
return result;
hle_handler->HandleSyncRequest(SharedPtr<ServerSession>(this));
// TODO(Subv): Translate the response command buffer.
+ } else {
+ // Add the thread to the list of threads that have issued a sync request with this
+ // server.
+ pending_requesting_threads.push_back(std::move(thread));
}
// If this ServerSession does not have an HLE implementation, just wake up the threads waiting
// on it.
- signaled = true;
WakeupAllWaitingThreads();
return RESULT_SUCCESS;
}
@@ -90,4 +100,4 @@ ResultCode TranslateHLERequest(ServerSession* server_session) {
// TODO(Subv): Implement this function once multiple concurrent processes are supported.
return RESULT_SUCCESS;
}
-}
+} // namespace Kernel
diff --git a/src/core/hle/kernel/server_session.h b/src/core/hle/kernel/server_session.h
index 5365605da..f4360ddf3 100644
--- a/src/core/hle/kernel/server_session.h
+++ b/src/core/hle/kernel/server_session.h
@@ -67,20 +67,30 @@ public:
/**
* Handle a sync request from the emulated application.
+ * @param thread Thread that initiated the request.
* @returns ResultCode from the operation.
*/
- ResultCode HandleSyncRequest();
+ ResultCode HandleSyncRequest(SharedPtr<Thread> thread);
bool ShouldWait(Thread* thread) const override;
void Acquire(Thread* thread) override;
std::string name; ///< The name of this session (optional)
- bool signaled; ///< Whether there's new data available to this ServerSession
std::shared_ptr<Session> parent; ///< The parent session, which links to the client endpoint.
std::shared_ptr<SessionRequestHandler>
hle_handler; ///< This session's HLE request handler (optional)
+ /// List of threads that are pending a response after a sync request. This list is processed in
+ /// a LIFO manner, thus, the last request will be dispatched first.
+ /// TODO(Subv): Verify if this is indeed processed in LIFO using a hardware test.
+ std::vector<SharedPtr<Thread>> pending_requesting_threads;
+
+ /// Thread whose request is currently being handled. A request is considered "handled" when a
+ /// response is sent via svcReplyAndReceive.
+ /// TODO(Subv): Find a better name for this.
+ SharedPtr<Thread> currently_handling;
+
private:
ServerSession();
~ServerSession() override;
diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp
index c05401143..e4b803046 100644
--- a/src/core/hle/svc.cpp
+++ b/src/core/hle/svc.cpp
@@ -25,6 +25,7 @@
#include "core/hle/kernel/semaphore.h"
#include "core/hle/kernel/server_port.h"
#include "core/hle/kernel/server_session.h"
+#include "core/hle/kernel/session.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/timer.h"
@@ -237,7 +238,7 @@ static ResultCode SendSyncRequest(Kernel::Handle handle) {
// TODO(Subv): svcSendSyncRequest should put the caller thread to sleep while the server
// responds and cause a reschedule.
- return session->SendSyncRequest();
+ return session->SendSyncRequest(Kernel::GetCurrentThread());
}
/// Close a handle
@@ -398,6 +399,112 @@ static ResultCode WaitSynchronizationN(s32* out, Kernel::Handle* handles, s32 ha
}
}
+/// In a single operation, sends a IPC reply and waits for a new request.
+static ResultCode ReplyAndReceive(s32* index, Kernel::Handle* handles, s32 handle_count,
+ Kernel::Handle reply_target) {
+ // 'handles' has to be a valid pointer even if 'handle_count' is 0.
+ if (handles == nullptr)
+ return Kernel::ERR_INVALID_POINTER;
+
+ // Check if 'handle_count' is invalid
+ if (handle_count < 0)
+ return Kernel::ERR_OUT_OF_RANGE;
+
+ using ObjectPtr = SharedPtr<Kernel::WaitObject>;
+ std::vector<ObjectPtr> objects(handle_count);
+
+ for (int i = 0; i < handle_count; ++i) {
+ auto object = Kernel::g_handle_table.Get<Kernel::WaitObject>(handles[i]);
+ if (object == nullptr)
+ return ERR_INVALID_HANDLE;
+ objects[i] = object;
+ }
+
+ // We are also sending a command reply.
+ // Do not send a reply if the command id in the command buffer is 0xFFFF.
+ u32* cmd_buff = Kernel::GetCommandBuffer();
+ IPC::Header header{cmd_buff[0]};
+ if (reply_target != 0 && header.command_id != 0xFFFF) {
+ auto session = Kernel::g_handle_table.Get<Kernel::ServerSession>(reply_target);
+ if (session == nullptr)
+ return ERR_INVALID_HANDLE;
+
+ auto request_thread = std::move(session->currently_handling);
+
+ // Mark the request as "handled".
+ session->currently_handling = nullptr;
+
+ // Error out if there's no request thread or the session was closed.
+ // TODO(Subv): Is the same error code (ClosedByRemote) returned for both of these cases?
+ if (request_thread == nullptr || session->parent->client == nullptr) {
+ *index = -1;
+ return Kernel::ERR_SESSION_CLOSED_BY_REMOTE;
+ }
+
+ // TODO(Subv): Perform IPC translation from the current thread to request_thread.
+
+ // Note: The scheduler is not invoked here.
+ request_thread->ResumeFromWait();
+ }
+
+ if (handle_count == 0) {
+ *index = 0;
+ // The kernel uses this value as a placeholder for the real error, and returns it when we
+ // pass no handles and do not perform any reply.
+ if (reply_target == 0 || header.command_id == 0xFFFF)
+ return ResultCode(0xE7E3FFFF);
+
+ return RESULT_SUCCESS;
+ }
+
+ auto thread = Kernel::GetCurrentThread();
+
+ // Find the first object that is acquirable in the provided list of objects
+ auto itr = std::find_if(objects.begin(), objects.end(), [thread](const ObjectPtr& object) {
+ return !object->ShouldWait(thread);
+ });
+
+ if (itr != objects.end()) {
+ // We found a ready object, acquire it and set the result value
+ Kernel::WaitObject* object = itr->get();
+ object->Acquire(thread);
+ *index = std::distance(objects.begin(), itr);
+
+ if (object->GetHandleType() == Kernel::HandleType::ServerSession) {
+ auto server_session = static_cast<Kernel::ServerSession*>(object);
+ if (server_session->parent->client == nullptr)
+ return Kernel::ERR_SESSION_CLOSED_BY_REMOTE;
+
+ // TODO(Subv): Perform IPC translation from the ServerSession to the current thread.
+ }
+ return RESULT_SUCCESS;
+ }
+
+ // No objects were ready to be acquired, prepare to suspend the thread.
+
+ // TODO(Subv): Perform IPC translation upon wakeup.
+
+ // Put the thread to sleep
+ thread->status = THREADSTATUS_WAIT_SYNCH_ANY;
+
+ // Add the thread to each of the objects' waiting threads.
+ for (size_t i = 0; i < objects.size(); ++i) {
+ Kernel::WaitObject* object = objects[i].get();
+ object->AddWaitingThread(thread);
+ }
+
+ thread->wait_objects = std::move(objects);
+
+ Core::System::GetInstance().PrepareReschedule();
+
+ // Note: The output of this SVC will be set to RESULT_SUCCESS if the thread resumes due to a
+ // signal in one of its wait objects, or to 0xC8A01836 if there was a translation error.
+ // By default the index is set to -1.
+ thread->wait_set_output = true;
+ *index = -1;
+ return RESULT_SUCCESS;
+}
+
/// Create an address arbiter (to allocate access to shared resources)
static ResultCode CreateAddressArbiter(Kernel::Handle* out_handle) {
using Kernel::AddressArbiter;
@@ -1163,7 +1270,7 @@ static const FunctionDef SVC_Table[] = {
{0x4C, nullptr, "ReplyAndReceive2"},
{0x4D, nullptr, "ReplyAndReceive3"},
{0x4E, nullptr, "ReplyAndReceive4"},
- {0x4F, nullptr, "ReplyAndReceive"},
+ {0x4F, HLE::Wrap<ReplyAndReceive>, "ReplyAndReceive"},
{0x50, nullptr, "BindInterrupt"},
{0x51, nullptr, "UnbindInterrupt"},
{0x52, nullptr, "InvalidateProcessDataCache"},
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 16:31:13 +0100