35 ssize_t os_read(int fd, void *buf, size_t count)  in os_read()
40 ssize_t os_read_no_block(int fd, void *buf, size_t count)  in os_read_no_block()
48 ssize_t os_write(int fd, const void *buf, size_t count)  in os_write()
53 off_t os_lseek(int fd, off_t offset, int whence)  in os_lseek()
91 int os_close(int fd)  in os_close()
119 void os_tty_raw(int fd, bool allow_sigs)  in os_tty_raw()
419 	int fd, ret;  in os_write_ram_buf()  local
435 	int fd, ret;  in os_read_ram_buf()  local
457 	int fd;  in make_exec()  local
497 	int fd, err;  in os_jump_to_image()  local
551 	int fd;  in os_find_u_boot()  local