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diff --git a/frontend/3ds/3ds_utils.h b/frontend/3ds/3ds_utils.h
index fe97985c..3d50a668 100644
--- a/frontend/3ds/3ds_utils.h
+++ b/frontend/3ds/3ds_utils.h
@@ -1,16 +1,66 @@
 #ifndef _3DS_UTILS_H
 #define _3DS_UTILS_H
 
-void ctr_invalidate_ICache(void);
-void ctr_flush_DCache(void);
+#include <stdio.h>
 
-void ctr_flush_invalidate_cache(void);
+#define MEMOP_PROT      6
+#define MEMOP_MAP       4
+#define MEMOP_UNMAP     5
 
-int ctr_svchack_init(void);
+void* linearMemAlign(size_t size, size_t alignment);
+void linearFree(void* mem);
+
+int32_t svcDuplicateHandle(uint32_t* out, uint32_t original);
+int32_t svcCloseHandle(uint32_t handle);
+int32_t svcControlMemory(void* addr_out, void* addr0, void* addr1, uint32_t size, uint32_t op, uint32_t perm);
+int32_t svcControlProcessMemory(uint32_t process, void* addr0, void* addr1, uint32_t size, uint32_t op, uint32_t perm);
+
+int32_t svcCreateThread(int32_t* thread, void *(*entrypoint)(void*), void* arg, void* stack_top, int32_t thread_priority, int32_t processor_id);
+int32_t svcWaitSynchronization(int32_t handle, int64_t nanoseconds);
+void svcExitThread(void) __attribute__((noreturn));
+
+int32_t svcBackdoor(int32_t (*callback)(void));
 
-#include <stdio.h>
 #define DEBUG_HOLD() do{printf("%s@%s:%d.\n",__FUNCTION__, __FILE__, __LINE__);fflush(stdout);wait_for_input();}while(0)
 
 void wait_for_input(void);
 
+extern __attribute__((weak)) int  __ctr_svchax;
+
+typedef int32_t (*ctr_callback_type)(void);
+
+static inline void ctr_invalidate_ICache_kernel(void)
+{
+   __asm__ volatile(
+      "cpsid aif\n\t"
+      "mov r0, #0\n\t"
+      "mcr p15, 0, r0, c7, c5, 0\n\t");
+}
+
+static inline void ctr_flush_DCache_kernel(void)
+{
+   __asm__ volatile(
+      "cpsid aif\n\t"
+      "mov r0, #0\n\t"
+      "mcr p15, 0, r0, c7, c10, 0\n\t");
+}
+
+static inline void ctr_invalidate_ICache(void)
+{
+   svcBackdoor((ctr_callback_type)ctr_invalidate_ICache_kernel);
+}
+
+static inline void ctr_flush_DCache(void)
+{
+   svcBackdoor((ctr_callback_type)ctr_flush_DCache_kernel);
+}
+
+
+static inline void ctr_flush_invalidate_cache(void)
+{
+   ctr_flush_DCache();
+   ctr_invalidate_ICache();
+}
+
+
 #endif // _3DS_UTILS_H