1/* Copyright (C) 1995-2013 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/* Legal values for a_type (entry type). */
19
20#define AT_NULL 0 /* End of vector */
21#define AT_IGNORE 1 /* Entry should be ignored */
22#define AT_EXECFD 2 /* File descriptor of program */
23#define AT_PHDR 3 /* Program headers for program */
24#define AT_PHENT 4 /* Size of program header entry */
25#define AT_PHNUM 5 /* Number of program headers */
26#define AT_PAGESZ 6 /* System page size */
27#define AT_BASE 7 /* Base address of interpreter */
28#define AT_FLAGS 8 /* Flags */
29#define AT_ENTRY 9 /* Entry point of program */
30#define AT_NOTELF 10 /* Program is not ELF */
31#define AT_UID 11 /* Real uid */
32#define AT_EUID 12 /* Effective uid */
33#define AT_GID 13 /* Real gid */
34#define AT_EGID 14 /* Effective gid */
35#define AT_CLKTCK 17 /* Frequency of times() */
36
37/* Some more special a_type values describing the hardware. */
38#define AT_PLATFORM 15 /* String identifying platform. */
39#define AT_HWCAP 16 /* Machine-dependent hints about
40 processor capabilities. */
41
42/* This entry gives some information about the FPU initialization
43 performed by the kernel. */
44#define AT_FPUCW 18 /* Used FPU control word. */
45
46/* Cache block sizes. */
47#define AT_DCACHEBSIZE 19 /* Data cache block size. */
48#define AT_ICACHEBSIZE 20 /* Instruction cache block size. */
49#define AT_UCACHEBSIZE 21 /* Unified cache block size. */
50
51/* A special ignored value for PPC, used by the kernel to control the
52 interpretation of the AUXV. Must be > 16. */
53#define AT_IGNOREPPC 22 /* Entry should be ignored. */
54
55#define AT_SECURE 23 /* Boolean, was exec setuid-like? */
56
57#define AT_BASE_PLATFORM 24 /* String identifying real platforms.*/
58
59#define AT_RANDOM 25 /* Address of 16 random bytes. */
60
61#define AT_HWCAP2 26 /* More machine-dependent hints about
62 processor capabilities. */
63
64#define AT_EXECFN 31 /* Filename of executable. */
65
66/* Pointer to the global system page used for system calls and other
67 nice things. */
68#define AT_SYSINFO 32
69#define AT_SYSINFO_EHDR 33
70
71/* Shapes of the caches. Bits 0-3 contains associativity; bits 4-7 contains
72 log2 of line size; mask those to get cache size. */
73#define AT_L1I_CACHESHAPE 34
74#define AT_L1D_CACHESHAPE 35
75#define AT_L2_CACHESHAPE 36
76#define AT_L3_CACHESHAPE 37
77
78/* Shapes of the caches, with more room to describe them.
79 *GEOMETRY are comprised of cache line size in bytes in the bottom 16 bits
80 and the cache associativity in the next 16 bits. */
81#define AT_L1I_CACHESIZE 40
82#define AT_L1I_CACHEGEOMETRY 41
83#define AT_L1D_CACHESIZE 42
84#define AT_L1D_CACHEGEOMETRY 43
85#define AT_L2_CACHESIZE 44
86#define AT_L2_CACHEGEOMETRY 45
87#define AT_L3_CACHESIZE 46
88#define AT_L3_CACHEGEOMETRY 47
89
90#define AT_MINSIGSTKSZ 51 /* Stack needed for signal delivery
91 (AArch64). */
92

source code of include/x86_64-linux-gnu/bits/auxv.h