2019-03-05 03:15:53 +00:00
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/* Special .init and .fini section support.
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2020-03-04 19:58:37 +00:00
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Copyright (C) 1997-2020 Free Software Foundation, Inc.
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2019-03-05 03:15:53 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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2020-03-04 19:58:37 +00:00
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<https://www.gnu.org/licenses/>. */
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2019-03-05 03:15:53 +00:00
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/* Define an ELF note identifying the operating-system ABI that the
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executable was created for. The ELF note information identifies a
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particular OS or coordinated development effort within which the
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ELF header's e_machine value plus (for dynamically linked programs)
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the PT_INTERP dynamic linker name and DT_NEEDED shared library
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names fully identify the runtime environment required by an
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executable.
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The general format of ELF notes is as follows.
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Offsets and lengths are bytes or (parenthetical references) to the
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values in other fields.
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offset length contents
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0 4 length of name
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4 4 length of data
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8 4 note type
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12 (0) vendor name
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- null-terminated ASCII string, padded to 4-byte alignment
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12+(0) (4) note data,
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The GNU project and cooperating development efforts (including the
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Linux community) use note type 1 and a vendor name string of "GNU"
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for a note descriptor that indicates ABI requirements. The note data
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is four 32-bit words. The first of these is an operating system
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number (0=Linux, 1=Hurd, 2=Solaris, ...) and the remaining three
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identify the earliest release of that OS that supports this ABI.
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See abi-tags (top level) for details. */
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#include <config.h>
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#include <abi-tag.h> /* OS-specific ABI tag value */
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/* The linker (GNU ld 2.8 and later) recognizes an allocated section whose
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name begins with `.note' and creates a PT_NOTE program header entry
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pointing at it. */
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.section ".note.ABI-tag", "a"
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.p2align 2
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.long 1f - 0f /* name length */
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.long 3f - 2f /* data length */
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.long 1 /* note type */
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0: .asciz "GNU" /* vendor name */
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1: .p2align 2
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2: .long __ABI_TAG_OS /* note data: the ABI tag */
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.long __ABI_TAG_VERSION
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3: .p2align 2 /* pad out section */
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