read(fd Int, address Pointer, length Int) -> Int { return syscall(0x2000003, fd, address, length) } write(fd Int, address Pointer, length Int) -> Int { return syscall(0x2000004, fd, address, length) } open(file Pointer, flags Int, mode Int) -> Int { return syscall(0x2000005, file, flags, mode) } close(fd Int) -> Int { return syscall(0x2000006, fd) } mmap(address Int, length Int, protection Int, flags Int) -> Pointer { return syscall(0x20000C5, address, length, protection, flags) } munmap(address Pointer, length Int) -> Int { return syscall(0x2000049, address, length) } exit(status Int) { syscall(0x2000001, status) }