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diff --git a/loader/realfuncs.h b/loader/realfuncs.h
new file mode 100644
index 0000000..4bca950
--- /dev/null
+++ b/loader/realfuncs.h
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <signal.h>
+#include <termios.h>
+
+
+int   real_open(const char *pathname, int flags, mode_t mode);
+FILE *real_fopen(const char *path, const char *mode);
+void *real_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
+int   real_read(int fd, void *buf, size_t count);
+int   real_ioctl(int fd, int request, void *argp);
+int   real_sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
+typedef struct sigaction sigaction_t;
+int   real_tcgetattr(int fd, struct termios *termios_p);
+int   real_tcsetattr(int fd, int optional_actions, const struct termios *termios_p);
+int   real_system(const char *command);
+
+#define open real_open
+#define fopen real_fopen
+#define mmap real_mmap
+#define read real_read
+#define ioctl real_ioctl
+#define sigaction real_sigaction
+#define tcgetattr real_tcgetattr
+#define tcsetattr real_tcsetattr
+#define system real_system
+