void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset);
int emu_do_ioctl(int fd, int request, void *argp);
int emu_read_gpiodev(void *buf, int count);
void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset);
int emu_do_ioctl(int fd, int request, void *argp);
int emu_read_gpiodev(void *buf, int count);