git subrepo clone --branch=develop https://github.com/m4xw/emuMMC emummc

subrepo:
  subdir:   "emummc"
  merged:   "e72e8f1c"
upstream:
  origin:   "https://github.com/m4xw/emuMMC"
  branch:   "develop"
  commit:   "e72e8f1c"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

emummc/source/libs/fatfs/ffsystem.c

@@ -0,0 +1,39 @@
+/*------------------------------------------------------------------------*/
+/* Sample Code of OS Dependent Functions for FatFs                        */
+/* (C) ChaN, 2018                                                          */
+/* (C) CTCaer, 2018                                                       */
+/*------------------------------------------------------------------------*/
+
+
+#include "ff.h"
+#include "../../utils/types.h"
+#include <stdlib.h>
+
+
+#if FF_USE_LFN == 3	/* Dynamic memory allocation */
+
+/*------------------------------------------------------------------------*/
+/* Allocate a memory block                                                */
+/*------------------------------------------------------------------------*/
+
+void* ff_memalloc (	/* Returns pointer to the allocated memory block (null if not enough core) */
+	UINT msize		/* Number of bytes to allocate */
+)
+{
+	return malloc(msize);	/* Allocate a new memory block with POSIX API */
+}
+
+
+/*------------------------------------------------------------------------*/
+/* Free a memory block                                                    */
+/*------------------------------------------------------------------------*/
+
+void ff_memfree (
+	void* mblock	/* Pointer to the memory block to free (nothing to do if null) */
+)
+{
+	free(mblock);	/* Free the memory block with POSIX API */
+}
+
+#endif
+