From b397c886e755ef84911b34af99ad72668ac4f8d5 Mon Sep 17 00:00:00 2001
From: PJB3005 <pieterjan.briers+git@gmail.com>
Date: Mon, 2 Mar 2026 14:27:20 +0100
Subject: [PATCH] Move some OS functionality to rely on Aurora

---
 CMakeLists.txt                          |  2 +-
 libs/JSystem/src/J3DGraphBase/J3DGD.cpp |  4 ++
 src/dusk/stubs.cpp                      | 79 -------------------------
 src/m_Do/m_Do_main.cpp                  | 13 +---
 4 files changed, 7 insertions(+), 91 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa728aff89..bdd458d5bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,7 +67,7 @@ target_include_directories(game_debug PUBLIC
         extern/aurora/include/dolphin
         ${CMAKE_BINARY_DIR}/../${DUSK_TP_VERSION}/include
         build/${DUSK_TP_VERSION}/include)
-target_link_libraries(game_debug PUBLIC aurora::core aurora::gx aurora::si aurora::vi aurora::pad aurora::mtx)
+target_link_libraries(game_debug PUBLIC aurora::core aurora::gx aurora::si aurora::vi aurora::pad aurora::mtx aurora::os)
 
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 add_library(game SHARED ${DOLZEL_FILES} ${Z2AUDIOLIB_FILES} ${SSYSTEM_FILES} ${JSYSTEM_FILES} ${REL_FILES} ${DUSK_FILES})
diff --git a/libs/JSystem/src/J3DGraphBase/J3DGD.cpp b/libs/JSystem/src/J3DGraphBase/J3DGD.cpp
index de18c40798..3eea255cd0 100644
--- a/libs/JSystem/src/J3DGraphBase/J3DGD.cpp
+++ b/libs/JSystem/src/J3DGraphBase/J3DGD.cpp
@@ -349,7 +349,11 @@ void J3DGDSetTexImgAttr(GXTexMapID id, u16 width, u16 height, GXTexFmt format) {
 }
 
 void J3DGDSetTexImgPtr(GXTexMapID id, void* image_ptr) {
+#if TARGET_PC
+    puts("J3DGDSetTexImgPtr is a stub");
+#else
     J3DGDWriteBPCmd(BP_IMAGE_PTR(OSCachedToPhysical(image_ptr) >> 5, J3DGDTexImage3Ids[id]));
+#endif
 }
 
 void J3DGDSetTexImgPtrRaw(GXTexMapID id, u32 image_ptr_raw) {
diff --git a/src/dusk/stubs.cpp b/src/dusk/stubs.cpp
index b967e8b4fd..eece4d356e 100644
--- a/src/dusk/stubs.cpp
+++ b/src/dusk/stubs.cpp
@@ -46,34 +46,6 @@ static bool PerfInitialized = false;
 // General OS
 // ==========================================================================
 
-
-// Credits: Super Monkey Ball
-
-static u64 GetGCTicks() {
-#if __APPLE__
-    return mach_absolute_time() * MachToDolphinNum / MachToDolphinDenom;
-#elif __linux__ || __FreeBSD__
-    struct timespec tp;
-    clock_gettime(CLOCK_MONOTONIC, &tp);
-
-    return ((tp.tv_sec * 1000000000ull) + tp.tv_nsec) * OS_CORE_CLOCK / 1000000000ull;
-#elif _WIN32
-    if (!PerfInitialized) {
-        QueryPerformanceFrequency(&PerfFrequency);
-        PerfInitialized = true;
-    }
-    LARGE_INTEGER perf;
-    QueryPerformanceCounter(&perf);
-
-    perf.QuadPart *= OS_CORE_CLOCK;
-    perf.QuadPart /= PerfFrequency.QuadPart;
-
-    return perf.QuadPart;
-#else
-    return 0;
-#endif
-} 
-
 u32 OSGetConsoleType() {
     return OS_CONSOLE_RETAIL1;
 }
@@ -82,10 +54,6 @@ u32 OSGetSoundMode() {
     return 2;
 }
 
-void OSInit() {
-    // Thread system is lazy-initialized via OSGetCurrentThread()
-}
-
 // ==========================================================================
 // Message Queue (thread-safe implementation)
 // ==========================================================================
@@ -232,45 +200,6 @@ int OSJamMessage(OSMessageQueue* mq, void* msg, s32 flags) {
 // Arena Functions
 // ==========================================================================
 
-static void* sArenaLo = nullptr;
-static void* sArenaHi = nullptr;
-
-void* OSGetArenaHi(void) {
-    return sArenaHi;
-}
-
-void* OSGetArenaLo(void) {
-    return sArenaLo;
-}
-
-void OSSetArenaHi(void* newHi) {
-    sArenaHi = newHi;
-}
-
-void OSSetArenaLo(void* newLo) {
-    sArenaLo = newLo;
-}
-
-void* OSAllocFromArenaLo(u32 size, u32 align) {
-    if (!sArenaLo || !sArenaHi) return nullptr;
-
-    uintptr_t lo = (uintptr_t)sArenaLo;
-    if (align > 0) {
-        lo = (lo + align - 1) & ~((uintptr_t)align - 1);
-    }
-
-    uintptr_t hi = (uintptr_t)sArenaHi;
-    if (lo + size > hi) {
-        OSReport("[PC-Arena] OSAllocFromArenaLo: out of arena space (need %u, have %u)\n",
-                 size, (u32)(hi - lo));
-        return nullptr;
-    }
-
-    void* result = (void*)lo;
-    sArenaLo = (void*)(lo + size);
-    return result;
-}
-
 void* OSInitAlloc(void* arenaStart, void* arenaEnd, int maxHeaps) {
     return arenaStart;
 }
@@ -289,14 +218,6 @@ void OSTicksToCalendarTime(OSTime ticks, OSCalendarTime* td) {
     if (td) memset(td, 0, sizeof(OSCalendarTime));
 }
 
-OSTime OSGetTime(void) {
-    return (OSTime)GetGCTicks();
-}
-
-OSTick OSGetTick(void) {
-    return (OSTick)GetGCTicks();
-}
-
 u16 OSGetFontEncode() { return 0; }
 
 char* OSGetFontTexture(char* string, void** image, s32* x, s32* y, s32* width) { return 0; }
diff --git a/src/m_Do/m_Do_main.cpp b/src/m_Do/m_Do_main.cpp
index 424e99c507..4919f8699e 100644
--- a/src/m_Do/m_Do_main.cpp
+++ b/src/m_Do/m_Do_main.cpp
@@ -231,19 +231,11 @@ int game_main(int argc, char* argv[]) {
     config.windowHeight = 480;
     config.configPath = ".";
     config.logCallback = &aurora_log_callback;
+    config.mem1Size = 256 * 1024 * 1024;
 
     auroraInfo = aurora_initialize(argc, argv, &config);
 
-    // 2. Setup Virtual Game RAM
-    // Simulates Gamecube RAM (24MB + Audio etc, we take 256MB)
-#define GAME_RAM_SIZE (256 * 1024 * 1024)
-    void* virtualGameRam = calloc(1, GAME_RAM_SIZE);
-    if (!virtualGameRam) {
-        printf("Fatal: Failed to allocate game RAM\n");
-        return -1;
-    }
-    OSSetArenaLo(virtualGameRam);
-    OSSetArenaHi((char*)virtualGameRam + GAME_RAM_SIZE);
+    OSInit();
 
     // 3. Init DVD Emulation
     DvdEmu::setBasePath("data");
@@ -269,7 +261,6 @@ int game_main(int argc, char* argv[]) {
     main01();
 
     aurora_shutdown();
-    free(virtualGameRam);
 
     return 0;
 }