Partially implement KUBridge, trying to help #8925. However, it doesn't even call the function.... Odd.

Core/Core.vcxproj

@@ -182,6 +182,7 @@
     <ClCompile Include="..\ext\udis86\syn.c" />
     <ClCompile Include="..\ext\udis86\udis86.c" />
     <ClCompile Include="AVIDump.cpp" />
+    <ClCompile Include="HLE\KUBridge.cpp" />
     <ClCompile Include="MIPS\IR\IRAsm.cpp" />
     <ClCompile Include="MIPS\IR\IRCompALU.cpp" />
     <ClCompile Include="MIPS\IR\IRCompBranch.cpp" />
@@ -522,6 +523,7 @@
     <ClInclude Include="..\ext\udis86\udint.h" />
     <ClInclude Include="..\ext\udis86\udis86.h" />
     <ClInclude Include="AVIDump.h" />
+    <ClInclude Include="HLE\KUBridge.h" />
     <ClInclude Include="MIPS\IR\IRFrontend.h" />
     <ClInclude Include="MIPS\IR\IRInst.h" />
     <ClInclude Include="MIPS\IR\IRInterpreter.h" />
@@ -759,4 +761,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

Core/Core.vcxproj.filters

@@ -677,6 +677,9 @@
       <Filter>Core</Filter>
     </ClCompile>
     <ClCompile Include="WaveFile.cpp" />
+    <ClCompile Include="HLE\KUBridge.cpp">
+      <Filter>HLE\Libraries</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ELF\ElfReader.h">
@@ -1244,10 +1247,13 @@
       <Filter>Core</Filter>
     </ClInclude>
     <ClInclude Include="WaveFile.h" />
+    <ClInclude Include="HLE\KUBridge.h">
+      <Filter>HLE\Libraries</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="CMakeLists.txt" />
     <None Include="..\LICENSE.TXT" />
     <None Include="..\android\jni\Android.mk" />
   </ItemGroup>
-</Project>
+</Project>

Core/HLE/HLETables.cpp

@@ -74,6 +74,7 @@
 #include "sceAdler.h"
 #include "sceSfmt19937.h"
 #include "sceG729.h"
+#include "KUBridge.h"
 
 #define N(s) s
 
@@ -266,12 +267,12 @@ void RegisterAllModules() {
 	Register_sceAudiocodec();
 	Register_sceHeap();
 
-	for (int i = 0; i < numModules; i++)
-	{
+	for (int i = 0; i < numModules; i++) {
 		RegisterModule(moduleList[i].name, moduleList[i].numFunctions, moduleList[i].funcTable);
 	}
 
-	// New modules have to be added at the end, or they will break savestates.
+	// IMPORTANT: New modules have to be added at the end, or they will break savestates.
+
 	Register_StdioForKernel();
 	RegisterModule("LoadCoreForKernel", ARRAY_SIZE(LoadCoreForKernel), LoadCoreForKernel);
 	Register_IoFileMgrForKernel();
@@ -292,5 +293,8 @@ void RegisterAllModules() {
 	Register_sceG729();
 	Register_sceNetUpnp();
 	Register_sceNetIfhandle();
+	Register_KUBridge();
+
+	// add new modules here.
 }
 

Core/HLE/KUBridge.cpp

@@ -0,0 +1,47 @@
+// Copyright (c) 2012- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+// KUBridge seems to be some utility module that comes with some custom firmware for PSP,
+// providing the ability to call some kernel-only functions from user mode.
+// A few homebrew applications use this. We only simulate a small subset of the functionality for now.
+
+#include "Core/HLE/HLE.h"
+#include "Core/HLE/FunctionWrappers.h"
+#include "Core/HLE/KUBridge.h"
+#include "Core/HLE/sceKernelModule.h"
+#include "Core/Config.h"
+
+static int kuKernelLoadModule(const char *path, uint32_t flags, uint32_t lmOptionAddr) {
+	INFO_LOG(HLE, "kuKernelLoadModule - forwarding to sceKernelLoadModule");
+	// Simply forward the call, like JPSCP does.
+	return sceKernelLoadModule(path, flags, lmOptionAddr);
+}
+
+static int kuKernelGetModel() {
+	INFO_LOG(HLE, "kuKernelGetModel()");
+	return g_Config.iPSPModel;
+}
+
+const HLEFunction KUBridge[] =
+{
+	{ 0x4C25EA72, &WrapI_CUU<kuKernelLoadModule>, "kuKernelLoadModule", 'i', "cuu" },
+	{ 0x24331850, &WrapI_V<kuKernelGetModel>, "kuKernelGetModel", 'i', "" },
+};
+
+void Register_KUBridge() {
+	RegisterModule("KUBridge", ARRAY_SIZE(KUBridge), KUBridge);
+}

Core/HLE/KUBridge.h

@@ -0,0 +1,20 @@
+// Copyright (c) 2012- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+#pragma once
+
+void Register_KUBridge();

Core/HLE/sceKernelModule.cpp

@@ -1678,8 +1678,7 @@ int sceKernelLoadExec(const char *filename, u32 paramPtr)
 	return 0;
 }
 
-
-static u32 sceKernelLoadModule(const char *name, u32 flags, u32 optionAddr) {
+u32 sceKernelLoadModule(const char *name, u32 flags, u32 optionAddr) {
 	if (!name) {
 		return hleLogError(LOADER, SCE_KERNEL_ERROR_ILLEGAL_ADDR, "bad filename");
 	}

Core/HLE/sceKernelModule.h

@@ -44,4 +44,7 @@ void __KernelReturnFromModuleFunc();
 u32 hleKernelStopUnloadSelfModuleWithOrWithoutStatus(u32 exitCode, u32 argSize, u32 argp, u32 statusAddr, u32 optionAddr, bool WithStatus);
 
 void Register_ModuleMgrForUser();
-void Register_ModuleMgrForKernel();
+void Register_ModuleMgrForKernel();
+
+// Expose for use by KUBridge.
+u32 sceKernelLoadModule(const char *name, u32 flags, u32 optionAddr);