/usr/include/x86_64-linux-gnu/asm/auxvec.h is in linux-libc-dev 3.16.51-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #ifndef _ASM_X86_AUXVEC_H
#define _ASM_X86_AUXVEC_H
/*
* Architecture-neutral AT_ values in 0-17, leave some room
* for more of them, start the x86-specific ones at 32.
*/
#ifdef __i386__
#define AT_SYSINFO 32
#endif
#define AT_SYSINFO_EHDR 33
/* entries in ARCH_DLINFO: */
#if defined(CONFIG_IA32_EMULATION) || !defined(CONFIG_X86_64)
# define AT_VECTOR_SIZE_ARCH 2
#else /* else it's non-compat x86-64 */
# define AT_VECTOR_SIZE_ARCH 1
#endif
#endif /* _ASM_X86_AUXVEC_H */
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