initial file system work

CMakeLists.txt

@@ -43,6 +43,12 @@ set(SYSTEMSERVICE_SOURCES src/Emulator/HLE/Libraries/LibSystemService/system_ser
                           src/Emulator/HLE/Libraries/LibSystemService/system_service.h
 )
 
+set(FILESYSTEM_SOURCES src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.cpp
+                       src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.h
+                       src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.cpp
+                       src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.h
+)
+
 set(UTIL_SOURCES src/Emulator/Util/singleton.h
 )
 
@@ -51,6 +57,7 @@ add_executable(shadps4
     ${USERSERVICE_SOURCES}
     ${PAD_SOURCES}
     ${SYSTEMSERVICE_SOURCES}
+    ${FILESYSTEM_SOURCES}
     ${UTIL_SOURCES}
     src/main.cpp
     src/types.h
@@ -86,7 +93,7 @@ add_executable(shadps4
     src/Core/PS4/HLE/Kernel/cpu_management.cpp
     src/Core/PS4/HLE/Kernel/cpu_management.h
     
-    "src/Util/Disassembler.cpp" "src/Util/Disassembler.h" "src/Core/PS4/Util/aerolib.h" "src/Core/PS4/Loader/SymbolsResolver.h" "src/Core/PS4/Loader/SymbolsResolver.cpp" "src/Core/PS4/HLE/Libs.cpp" "src/Core/PS4/HLE/Libs.h" "src/Core/PS4/HLE/LibC.cpp" "src/Core/PS4/HLE/LibC.h" "src/Lib/Timer.cpp" "src/Lib/Timer.h" "src/Core/PS4/HLE/LibKernel.cpp" "src/Core/PS4/HLE/LibKernel.h"   "src/Core/PS4/HLE/LibSceGnmDriver.cpp" "src/Core/PS4/HLE/LibSceGnmDriver.h" "src/Core/PS4/HLE/Kernel/ThreadManagement.cpp" "src/Core/PS4/HLE/Kernel/ThreadManagement.h" "src/Core/PS4/HLE/ErrorCodes.h" "src/debug.h" "src/Core/PS4/HLE/Kernel/memory_management.cpp" "src/Core/PS4/HLE/Kernel/memory_management.h" "src/Core/PS4/GPU/gpu_memory.cpp" "src/Core/PS4/GPU/gpu_memory.h" "src/emulator.cpp" "src/emulator.h"  "src/Core/PS4/HLE/Kernel/Objects/event_queue.h" "src/Core/PS4/HLE/Kernel/Objects/event_queue.cpp" "src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp" "src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h" "src/Core/PS4/HLE/Graphics/graphics_ctx.h" "src/vulkan_util.cpp" "src/vulkan_util.h" "src/Core/PS4/GPU/video_out_buffer.cpp" "src/Core/PS4/GPU/video_out_buffer.h" "src/Core/PS4/HLE/Graphics/graphics_render.cpp" "src/Core/PS4/HLE/Graphics/graphics_render.h" "src/Core/PS4/GPU/tile_manager.cpp" "src/Core/PS4/GPU/tile_manager.h" "src/version.h" "src/Emulator/HLE/Libraries/LibSystemService/system_service.cpp" "src/Emulator/HLE/Libraries/LibSystemService/system_service.h")
+    "src/Util/Disassembler.cpp" "src/Util/Disassembler.h" "src/Core/PS4/Util/aerolib.h" "src/Core/PS4/Loader/SymbolsResolver.h" "src/Core/PS4/Loader/SymbolsResolver.cpp" "src/Core/PS4/HLE/Libs.cpp" "src/Core/PS4/HLE/Libs.h" "src/Core/PS4/HLE/LibC.cpp" "src/Core/PS4/HLE/LibC.h" "src/Lib/Timer.cpp" "src/Lib/Timer.h" "src/Core/PS4/HLE/LibKernel.cpp" "src/Core/PS4/HLE/LibKernel.h"   "src/Core/PS4/HLE/LibSceGnmDriver.cpp" "src/Core/PS4/HLE/LibSceGnmDriver.h" "src/Core/PS4/HLE/Kernel/ThreadManagement.cpp" "src/Core/PS4/HLE/Kernel/ThreadManagement.h" "src/Core/PS4/HLE/ErrorCodes.h" "src/debug.h" "src/Core/PS4/HLE/Kernel/memory_management.cpp" "src/Core/PS4/HLE/Kernel/memory_management.h" "src/Core/PS4/GPU/gpu_memory.cpp" "src/Core/PS4/GPU/gpu_memory.h" "src/emulator.cpp" "src/emulator.h"  "src/Core/PS4/HLE/Kernel/Objects/event_queue.h" "src/Core/PS4/HLE/Kernel/Objects/event_queue.cpp" "src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp" "src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h" "src/Core/PS4/HLE/Graphics/graphics_ctx.h" "src/vulkan_util.cpp" "src/vulkan_util.h" "src/Core/PS4/GPU/video_out_buffer.cpp" "src/Core/PS4/GPU/video_out_buffer.h" "src/Core/PS4/HLE/Graphics/graphics_render.cpp" "src/Core/PS4/HLE/Graphics/graphics_render.h" "src/Core/PS4/GPU/tile_manager.cpp" "src/Core/PS4/GPU/tile_manager.h" "src/version.h" "src/Emulator/HLE/Libraries/LibSystemService/system_service.cpp" "src/Emulator/HLE/Libraries/LibSystemService/system_service.h" "src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.cpp" "src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.h" "src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.cpp" "src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.h")
 
 find_package(OpenGL REQUIRED)
 target_link_libraries(shadps4 PUBLIC fmt mincore spdlog IMGUI SDL3-shared ${OPENGL_LIBRARY} vulkan-1 spirv-tools-opt spirv-tools)

src/Core/PS4/HLE/LibC.cpp

@@ -107,6 +107,9 @@ void PS4_SYSV_ABI qsort(void* ptr, size_t count,size_t size, int(PS4_SYSV_ABI* c
     std::qsort(ptr, count, size, qsort_compair);
 }
 
+void* PS4_SYSV_ABI fopen(const char* filename, const char* mode) { 
+    return std::fopen(filename, mode);
+}
 
 void LibC_Register(SymbolsResolver* sym) {
     LIB_FUNCTION("bzQExy189ZI", "libc", 1, "libc", 1, 1, init_env);
@@ -137,6 +140,7 @@ void LibC_Register(SymbolsResolver* sym) {
     LIB_FUNCTION("eT2UsmTewbU", "libc", 1, "libc", 1, 1, _ZSt11_Xbad_allocv);
     LIB_FUNCTION("tQIo+GIPklo", "libc", 1, "libc", 1, 1, _ZSt14_Xlength_errorPKc);
     LIB_FUNCTION("fJnpuVVBbKk", "libc", 1, "libc", 1, 1, _Znwm);
+    LIB_FUNCTION("xeYO4u7uyJ0", "libc", 1, "libc", 1, 1, fopen);
 }
 
 };  // namespace HLE::Libs::LibC

src/Core/PS4/HLE/LibKernel.cpp

@@ -10,6 +10,8 @@
 #include "Kernel/event_queues.h"
 #include "Kernel/memory_management.h"
 #include "Libs.h"
+#include "Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.h"
+#include "Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.h"
 
 namespace HLE::Libs::LibKernel {
 
@@ -44,6 +46,9 @@ void LibKernel_Register(SymbolsResolver* sym) {
     LIB_FUNCTION("Ou3iL1abvng", "libkernel", 1, "libkernel", 1, 1, stack_chk_fail);
     // time
     LIB_FUNCTION("-2IRUCO--PM", "libkernel", 1, "libkernel", 1, 1, sceKernelReadTsc);
+    //fs
+    LIB_FUNCTION("1G3lF1Gg1k8", "libkernel", 1, "libkernel", 1, 1, Emulator::HLE::Libraries::LibKernel::FileSystem::sceKernelOpen);
+    LIB_FUNCTION("wuCroIGjt2g", "libScePosix", 1, "libkernel", 1, 1, Emulator::HLE::Libraries::LibKernel::FileSystem::POSIX::open);
 }
 
 };  // namespace HLE::Libs::LibKernel

src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.cpp

@@ -0,0 +1,13 @@
+#include "file_system.h"
+#include <debug.h>
+#include <Util/log.h>
+
+namespace Emulator::HLE::Libraries::LibKernel::FileSystem {
+constexpr bool log_file_fs = true;  // disable it to disable logging
+
+int PS4_SYSV_ABI sceKernelOpen(const char* path, int flags, u16 mode) { 
+	LOG_INFO_IF(log_file_fs, "sceKernelOpen path = {} flags = {} mode = {}\n", path, log_hex_full(flags), log_hex_full(mode));
+	return 0; 
+}
+
+}  // namespace Emulator::HLE::Libraries::LibKernel::FileSystem

src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.h

@@ -0,0 +1,7 @@
+#pragma once
+#include <types.h>
+
+namespace Emulator::HLE::Libraries::LibKernel::FileSystem {
+int PS4_SYSV_ABI sceKernelOpen(const char *path, int flags, /* SceKernelMode*/ u16 mode);
+
+}

src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.cpp

@@ -0,0 +1,15 @@
+#include "posix_file_system.h"
+
+#include <debug.h>
+
+#include "file_system.h"
+
+namespace Emulator::HLE::Libraries::LibKernel::FileSystem::POSIX {
+int PS4_SYSV_ABI open(const char* path, int flags, /* SceKernelMode*/ u16 mode) {
+    int result = sceKernelOpen(path, flags, mode);
+    if (result < 0) {
+        BREAKPOINT();  // posix calls different only for their return values
+    }
+    return result;
+}
+}  // namespace Emulator::HLE::Libraries::LibKernel::FileSystem::POSIX

src/Emulator/HLE/Libraries/LibKernel/FileSystem/posix_file_system.h

@@ -0,0 +1,6 @@
+#pragma once
+#include "types.h"
+
+namespace Emulator::HLE::Libraries::LibKernel::FileSystem::POSIX {
+int PS4_SYSV_ABI open(const char *path, int flags, /* SceKernelMode*/ u16 mode);
+}