Add baseheap functions.

include/coreinit/baseheap.h

@@ -0,0 +1,26 @@
+#pragma once
+#include <wut.h>
+
+WUT_LIB_HEADER_START
+
+typedef uint32_t MEMBaseHeapType;
+typedef void *MEMHeapHandle;
+
+enum MEMBaseHeapType
+{
+   MEM_BASE_HEAP_MEM1   = 0,
+   MEM_BASE_HEAP_MEM2   = 1,
+   MEM_BASE_HEAP_FG     = 8,
+};
+
+MEMBaseHeapType
+MEMGetArena(MEMHeapHandle handle);
+
+MEMHeapHandle
+MEMGetBaseHeapHandle(MEMBaseHeapType type);
+
+MEMHeapHandle
+MEMSetBaseHeapHandle(MEMBaseHeapType type,
+                     MEMHeapHandle handle);
+
+WUT_LIB_HEADER_END

rpl/libcoreinit/exports.h

@@ -25,6 +25,11 @@ EXPORT(OSXorAtomic64);
 EXPORT(OSTestAndClearAtomic64);
 EXPORT(OSTestAndSetAtomic64);
 
+// coreinit/baseheap.h
+EXPORT(MEMGetArena);
+EXPORT(MEMGetBaseHeapHandle);
+EXPORT(MEMSetBaseHeapHandle);
+
 // coreinit/cache.h
 EXPORT(DCInvalidateRange);
 EXPORT(DCFlushRange);