Remove Overlayhader and support loading overlays

include/PSX/Overlay/overlay.hpp

@@ -3,11 +3,9 @@
 #include "../AutoLBA/auto_lba.hpp"
 
 namespace JabyEngine {
-    struct __attribute__((packed)) OverlayHeader {
-        void   (*execute)();
-        uint16_t lba_size; //< The size of the OverlayLBA section
-    };
-
     typedef AutoLBAEntry OverlayLBA;
+
+    // Can be used to create dummy values to trick LZ4 into compressing an uncompressed overlay
+    #define __create_dummy_fill(length) static const uint8_t __section(".keep.dummy") __used DummyFilling[length] = {0x0}
 }
 #endif //!__JABYENGINE_OVERLAY__HPP__

include/PSX/Overlay/overlay_declaration.hpp

@@ -4,10 +4,7 @@
 // No include here because this header should be included in a namespace and we don't want multiple namespace definitions of OverlayHeader and OverlayLBA
 
 #include "../AutoLBA/auto_lba_declaration.hpp"
-extern const JabyEngine::OverlayHeader overlay_header;
 
 #define __declare_overlay_header(function, enum_struct) \
-__declare_lba_header(enum_struct); \
-[[gnu::used]] \
-const JabyEngine::OverlayHeader __section(".header") overlay_header = {.execute = &function, .lba_size = static_cast<uint16_t>(enum_struct::EndOfRequest)};
+__declare_lba_header(enum_struct)
 #endif //!__JABYENGINE_OVERLAY_DECLARATION__HPP__