From a6cfee85e5df5243120ec6db300f15d1bcc05615 Mon Sep 17 00:00:00 2001
From: Stephen Miller <millerste004@gmail.com>
Date: Tue, 1 Apr 2025 18:38:21 -0500
Subject: [PATCH] Better ulobjmgr stubs

Main goal is to stop all the Unknown stub spam in titles using libSceUlt.
---
 CMakeLists.txt                           |  2 ++
 src/core/libraries/libs.cpp              |  2 ++
 src/core/libraries/ulobjmgr/ulobjmgr.cpp | 45 ++++++++++++++++++++++++
 src/core/libraries/ulobjmgr/ulobjmgr.h   | 14 ++++++++
 4 files changed, 63 insertions(+)
 create mode 100644 src/core/libraries/ulobjmgr/ulobjmgr.cpp
 create mode 100644 src/core/libraries/ulobjmgr/ulobjmgr.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d50dc187d..b3aba5d13 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -578,6 +578,8 @@ set(MISC_LIBS  src/core/libraries/screenshot/screenshot.cpp
                src/core/libraries/screenshot/screenshot.h
                src/core/libraries/move/move.cpp
                src/core/libraries/move/move.h
+               src/core/libraries/ulobjmgr/ulobjmgr.cpp
+               src/core/libraries/ulobjmgr/ulobjmgr.h
 )
 
 set(DEV_TOOLS src/core/devtools/layer.cpp
diff --git a/src/core/libraries/libs.cpp b/src/core/libraries/libs.cpp
index cd0fe650b..d0f82556e 100644
--- a/src/core/libraries/libs.cpp
+++ b/src/core/libraries/libs.cpp
@@ -50,6 +50,7 @@
 #include "core/libraries/system/sysmodule.h"
 #include "core/libraries/system/systemservice.h"
 #include "core/libraries/system/userservice.h"
+#include "core/libraries/ulobjmgr/ulobjmgr.h"
 #include "core/libraries/usbd/usbd.h"
 #include "core/libraries/videodec/videodec.h"
 #include "core/libraries/videodec/videodec2.h"
@@ -116,6 +117,7 @@ void InitHLELibs(Core::Loader::SymbolsResolver* sym) {
     Libraries::Zlib::RegisterlibSceZlib(sym);
     Libraries::Hmd::RegisterlibSceHmd(sym);
     Libraries::DiscMap::RegisterlibSceDiscMap(sym);
+    Libraries::Ulobjmgr::RegisterlibSceUlobjmgr(sym);
 }
 
 } // namespace Libraries
diff --git a/src/core/libraries/ulobjmgr/ulobjmgr.cpp b/src/core/libraries/ulobjmgr/ulobjmgr.cpp
new file mode 100644
index 000000000..3bbe18f13
--- /dev/null
+++ b/src/core/libraries/ulobjmgr/ulobjmgr.cpp
@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/logging/log.h"
+#include "core/libraries/error_codes.h"
+#include "core/libraries/kernel/posix_error.h"
+#include "core/libraries/libs.h"
+#include "core/libraries/ulobjmgr/ulobjmgr.h"
+
+namespace Libraries::Ulobjmgr {
+
+s64 PS4_SYSV_ABI Func_046DBA8411A2365C(u64 unk1, s32 unk2, u32* unk3) {
+    if (unk1 == 0 || unk2 == 0 || unk3 == nullptr) {
+        return POSIX_EINVAL;
+    }
+    *unk3 = 0;
+    return ORBIS_OK;
+}
+
+s64 PS4_SYSV_ABI Func_1D9F50D9CFB8054E() {
+    return ORBIS_OK;
+}
+
+s64 PS4_SYSV_ABI Func_4A67FE7D435B94F7(u32 unk) {
+    if (unk >= 0x4000) {
+        return POSIX_EINVAL;
+    }
+    return ORBIS_OK;
+}
+
+s64 PS4_SYSV_ABI Func_4B07893BBB77A649(u64 unk) {
+    if (unk == 0) {
+        return POSIX_EINVAL;
+    }
+    return ORBIS_OK;
+}
+
+void RegisterlibSceUlobjmgr(Core::Loader::SymbolsResolver* sym) {
+    LIB_FUNCTION("BG26hBGiNlw", "ulobjmgr", 1, "ulobjmgr", 1, 1, Func_046DBA8411A2365C);
+    LIB_FUNCTION("HZ9Q2c+4BU4", "ulobjmgr", 1, "ulobjmgr", 1, 1, Func_1D9F50D9CFB8054E);
+    LIB_FUNCTION("Smf+fUNblPc", "ulobjmgr", 1, "ulobjmgr", 1, 1, Func_4A67FE7D435B94F7);
+    LIB_FUNCTION("SweJO7t3pkk", "ulobjmgr", 1, "ulobjmgr", 1, 1, Func_4B07893BBB77A649);
+};
+
+} // namespace Libraries::Ulobjmgr
\ No newline at end of file
diff --git a/src/core/libraries/ulobjmgr/ulobjmgr.h b/src/core/libraries/ulobjmgr/ulobjmgr.h
new file mode 100644
index 000000000..9a1440e5c
--- /dev/null
+++ b/src/core/libraries/ulobjmgr/ulobjmgr.h
@@ -0,0 +1,14 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/types.h"
+
+namespace Core::Loader {
+class SymbolsResolver;
+}
+
+namespace Libraries::Ulobjmgr {
+void RegisterlibSceUlobjmgr(Core::Loader::SymbolsResolver* sym);
+} // namespace Libraries::Ulobjmgr
\ No newline at end of file