1/* Special .init and .fini section support.
 2   Copyright (C) 1997-2020 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   In addition to the permissions in the GNU Lesser General Public
11   License, the Free Software Foundation gives you unlimited
12   permission to link the compiled version of this file with other
13   programs, and to distribute those programs without any restriction
14   coming from the use of this file.  (The Lesser General Public
15   License restrictions do apply in other respects; for example, they
16   cover modification of the file, and distribution when not linked
17   into another program.)
18
19   The GNU C Library is distributed in the hope that it will be useful,
20   but WITHOUT ANY WARRANTY; without even the implied warranty of
21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
22   Lesser General Public License for more details.
23
24   You should have received a copy of the GNU Lesser General Public
25   License along with the GNU C Library; if not, see
26   <https://www.gnu.org/licenses/>.  */
27
28/* Define an ELF note identifying the operating-system ABI that the
29   executable was created for.  The ELF note information identifies a
30   particular OS or coordinated development effort within which the
31   ELF header's e_machine value plus (for dynamically linked programs)
32   the PT_INTERP dynamic linker name and DT_NEEDED shared library
33   names fully identify the runtime environment required by an
34   executable.
35
36   The general format of ELF notes is as follows.
37   Offsets and lengths are bytes or (parenthetical references) to the
38   values in other fields.
39
40offset	length	contents
410	4	length of name
424	4	length of data
438	4	note type
4412	(0)	vendor name
45		- null-terminated ASCII string, padded to 4-byte alignment
4612+(0)	(4)	note data,
47
48   The GNU project and cooperating development efforts (including the
49   Linux community) use note type 1 and a vendor name string of "GNU"
50   for a note descriptor that indicates ABI requirements.  The note data
51   is four 32-bit words.  The first of these is an operating system
52   number (0=Linux, 1=Hurd, 2=Solaris, ...) and the remaining three
53   identify the earliest release of that OS that supports this ABI.
54   See abi-tags (top level) for details. */
55
56#include <config.h>
57#include <abi-tag.h>		/* OS-specific ABI tag value */
58
59/* The linker (GNU ld 2.8 and later) recognizes an allocated section whose
60   name begins with `.note' and creates a PT_NOTE program header entry
61   pointing at it. */
62
63	.section ".note.ABI-tag", "a"
64	.p2align 2
65	.long 1f - 0f		/* name length */
66	.long 3f - 2f		/* data length */
67	.long  1		/* note type */
680:	.asciz "GNU"		/* vendor name */
691:	.p2align 2
702:	.long __ABI_TAG_OS	/* note data: the ABI tag */
71	.long __ABI_TAG_VERSION
723:	.p2align 2		/* pad out section */