From 9b34afa588c4e4bf312e2812ffe6879e09dafc75 Mon Sep 17 00:00:00 2001 From: Liam Date: Mon, 3 Oct 2022 22:52:52 -0400 Subject: [PATCH] Add implementation of svcCreateSession --- src/core/hle/kernel/svc.cpp | 90 +++++++++++++++++++++++++++++++++- src/core/hle/kernel/svc_wrap.h | 14 ++++++ 2 files changed, 103 insertions(+), 1 deletion(-) diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index 27e5a805db..3a89511aa7 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -29,6 +29,7 @@ #include "core/hle/kernel/k_resource_limit.h" #include "core/hle/kernel/k_scheduler.h" #include "core/hle/kernel/k_scoped_resource_reservation.h" +#include "core/hle/kernel/k_session.h" #include "core/hle/kernel/k_shared_memory.h" #include "core/hle/kernel/k_synchronization_object.h" #include "core/hle/kernel/k_thread.h" @@ -256,6 +257,93 @@ static Result UnmapMemory32(Core::System& system, u32 dst_addr, u32 src_addr, u3 return UnmapMemory(system, dst_addr, src_addr, size); } +template +Result CreateSession(Core::System& system, Handle* out_server, Handle* out_client, u64 name) { + auto& process = *system.CurrentProcess(); + auto& handle_table = process.GetHandleTable(); + + // Declare the session we're going to allocate. + T* session; + + // Reserve a new session from the process resource limit. + // FIXME: LimitableResource_SessionCountMax + KScopedResourceReservation session_reservation(&process, LimitableResource::Sessions); + if (session_reservation.Succeeded()) { + session = T::Create(system.Kernel()); + } else { + return ResultLimitReached; + + // // We couldn't reserve a session. Check that we support dynamically expanding the + // // resource limit. + // R_UNLESS(process.GetResourceLimit() == + // &system.Kernel().GetSystemResourceLimit(), ResultLimitReached); + // R_UNLESS(KTargetSystem::IsDynamicResourceLimitsEnabled(), ResultLimitReached()); + + // // Try to allocate a session from unused slab memory. + // session = T::CreateFromUnusedSlabMemory(); + // R_UNLESS(session != nullptr, ResultLimitReached); + // ON_RESULT_FAILURE { session->Close(); }; + + // // If we're creating a KSession, we want to add two KSessionRequests to the heap, to + // // prevent request exhaustion. + // // NOTE: Nintendo checks if session->DynamicCast() != nullptr, but there's + // // no reason to not do this statically. + // if constexpr (std::same_as) { + // for (size_t i = 0; i < 2; i++) { + // KSessionRequest* request = KSessionRequest::CreateFromUnusedSlabMemory(); + // R_UNLESS(request != nullptr, ResultLimitReached); + // request->Close(); + // } + // } + + // We successfully allocated a session, so add the object we allocated to the resource + // limit. + // system.Kernel().GetSystemResourceLimit().Reserve(LimitableResource::Sessions, 1); + } + + // Check that we successfully created a session. + R_UNLESS(session != nullptr, ResultOutOfResource); + + // Initialize the session. + session->Initialize(nullptr, fmt::format("{}", name)); + + // Commit the session reservation. + session_reservation.Commit(); + + // Ensure that we clean up the session (and its only references are handle table) on function + // end. + SCOPE_EXIT({ + session->GetClientSession().Close(); + session->GetServerSession().Close(); + }); + + // Register the session. + T::Register(system.Kernel(), session); + + // Add the server session to the handle table. + R_TRY(handle_table.Add(out_server, &session->GetServerSession())); + + // Add the client session to the handle table. */ + const auto result = handle_table.Add(out_client, &session->GetClientSession()); + + if (!R_SUCCEEDED(result)) { + // Ensure that we maintaing a clean handle state on exit. + handle_table.Remove(*out_server); + } + + return result; +} + +static Result CreateSession(Core::System& system, Handle* out_server, Handle* out_client, + u32 is_light, u64 name) { + if (is_light) { + // return CreateSession(system, out_server, out_client, name); + return ResultUnknown; + } else { + return CreateSession(system, out_server, out_client, name); + } +} + /// Connect to an OS service given the port name, returns the handle to the port to out static Result ConnectToNamedPort(Core::System& system, Handle* out, VAddr port_name_address) { auto& memory = system.Memory(); @@ -2860,7 +2948,7 @@ static const FunctionDef SVC_Table_64[] = { {0x3D, SvcWrap64, "ChangeKernelTraceState"}, {0x3E, nullptr, "Unknown3e"}, {0x3F, nullptr, "Unknown3f"}, - {0x40, nullptr, "CreateSession"}, + {0x40, SvcWrap64, "CreateSession"}, {0x41, nullptr, "AcceptSession"}, {0x42, nullptr, "ReplyAndReceiveLight"}, {0x43, nullptr, "ReplyAndReceive"}, diff --git a/src/core/hle/kernel/svc_wrap.h b/src/core/hle/kernel/svc_wrap.h index 4bc49087e2..16bf65802a 100644 --- a/src/core/hle/kernel/svc_wrap.h +++ b/src/core/hle/kernel/svc_wrap.h @@ -346,6 +346,20 @@ void SvcWrap64(Core::System& system) { FuncReturn(system, retval); } +// Used by CreateSession +template +void SvcWrap64(Core::System& system) { + Handle param_1 = 0; + Handle param_2 = 0; + const u32 retval = func(system, ¶m_1, ¶m_2, static_cast(Param(system, 2)), + static_cast(Param(system, 3))) + .raw; + + system.CurrentArmInterface().SetReg(1, param_1); + system.CurrentArmInterface().SetReg(2, param_2); + FuncReturn(system, retval); +} + // Used by WaitForAddress template void SvcWrap64(Core::System& system) {