```$ cat /usr/include/x86_64-linux-gnu/asm/unistd....
# generalb
Benjamin Herrenschmidt
08/20/2020, 11:52 PM Copy code
$ cat /usr/include/x86_64-linux-gnu/asm/unistd.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_X86_UNISTD_H
#define _ASM_X86_UNISTD_H
/* x32 syscall flag bit */
#define __X32_SYSCALL_BIT 0x40000000
# ifdef __i386__
# include <asm/unistd_32.h>
# elif defined(__ILP32__)
# include <asm/unistd_x32.h>
# else
# include <asm/unistd_64.h>
# endif
#endif /* _ASM_X86_UNISTD_H */