1 files changed, 71 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_port.cpp b/src/core/hle/kernel/svc/svc_port.cpp
new file mode 100644
index 000000000..cdfe0dd16
--- /dev/null
+++ b/src/core/hle/kernel/svc/svc_port.cpp
@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/scope_exit.h"
+#include "core/core.h"
+#include "core/hle/kernel/k_client_port.h"
+#include "core/hle/kernel/k_client_session.h"
+#include "core/hle/kernel/k_port.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/svc.h"
+
+namespace Kernel::Svc {
+
+/// Connect to an OS service given the port name, returns the handle to the port to out
+Result ConnectToNamedPort(Core::System& system, Handle* out, VAddr port_name_address) {
+    auto& memory = system.Memory();
+    if (!memory.IsValidVirtualAddress(port_name_address)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Port Name Address is not a valid virtual address, port_name_address=0x{:016X}",
+                  port_name_address);
+        return ResultNotFound;
+    }
+
+    static constexpr std::size_t PortNameMaxLength = 11;
+    // Read 1 char beyond the max allowed port name to detect names that are too long.
+    const std::string port_name = memory.ReadCString(port_name_address, PortNameMaxLength + 1);
+    if (port_name.size() > PortNameMaxLength) {
+        LOG_ERROR(Kernel_SVC, "Port name is too long, expected {} but got {}", PortNameMaxLength,
+                  port_name.size());
+        return ResultOutOfRange;
+    }
+
+    LOG_TRACE(Kernel_SVC, "called port_name={}", port_name);
+
+    // Get the current handle table.
+    auto& kernel = system.Kernel();
+    auto& handle_table = kernel.CurrentProcess()->GetHandleTable();
+
+    // Find the client port.
+    auto port = kernel.CreateNamedServicePort(port_name);
+    if (!port) {
+        LOG_ERROR(Kernel_SVC, "tried to connect to unknown port: {}", port_name);
+        return ResultNotFound;
+    }
+
+    // Reserve a handle for the port.
+    // NOTE: Nintendo really does write directly to the output handle here.
+    R_TRY(handle_table.Reserve(out));
+    auto handle_guard = SCOPE_GUARD({ handle_table.Unreserve(*out); });
+
+    // Create a session.
+    KClientSession* session{};
+    R_TRY(port->CreateSession(std::addressof(session)));
+
+    kernel.RegisterNamedServiceHandler(port_name, &port->GetParent()->GetServerPort());
+
+    // Register the session in the table, close the extra reference.
+    handle_table.Register(*out, session);
+    session->Close();
+
+    // We succeeded.
+    handle_guard.Cancel();
+    return ResultSuccess;
+}
+
+Result ConnectToNamedPort32(Core::System& system, Handle* out_handle, u32 port_name_address) {
+
+    return ConnectToNamedPort(system, out_handle, port_name_address);
+}
+
+} // namespace Kernel::Svc