mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 14:50:05 +00:00
78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
/* Special .init and .fini section support.
|
|
Copyright (C) 1997-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
In addition to the permissions in the GNU Lesser General Public
|
|
License, the Free Software Foundation gives you unlimited
|
|
permission to link the compiled version of this file with other
|
|
programs, and to distribute those programs without any restriction
|
|
coming from the use of this file. (The Lesser General Public
|
|
License restrictions do apply in other respects; for example, they
|
|
cover modification of the file, and distribution when not linked
|
|
into another program.)
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Define an ELF note identifying the operating-system ABI that the
|
|
executable was created for. The ELF note information identifies a
|
|
particular OS or coordinated development effort within which the
|
|
ELF header's e_machine value plus (for dynamically linked programs)
|
|
the PT_INTERP dynamic linker name and DT_NEEDED shared library
|
|
names fully identify the runtime environment required by an
|
|
executable.
|
|
|
|
The general format of ELF notes is as follows.
|
|
Offsets and lengths are bytes or (parenthetical references) to the
|
|
values in other fields.
|
|
|
|
offset length contents
|
|
0 4 length of name
|
|
4 4 length of data
|
|
8 4 note type
|
|
12 (0) vendor name
|
|
- null-terminated ASCII string, padded to 4-byte alignment
|
|
12+(0) (4) note data,
|
|
|
|
The GNU project and cooperating development efforts (including the
|
|
Linux community) use note type 1 and a vendor name string of "GNU"
|
|
for a note descriptor that indicates ABI requirements. The note data
|
|
is four 32-bit words. The first of these is an operating system
|
|
number (0=Linux, 1=Hurd, 2=Solaris, ...) and the remaining three
|
|
identify the earliest release of that OS that supports this ABI.
|
|
See abi-tags (top level) for details. */
|
|
|
|
#include <link.h>
|
|
#include <stdint.h>
|
|
#include <config.h>
|
|
#include <abi-tag.h> /* OS-specific ABI tag value */
|
|
|
|
/* The linker (GNU ld 2.8 and later) recognizes an allocated section whose
|
|
name begins with `.note' and creates a PT_NOTE program header entry
|
|
pointing at it. */
|
|
|
|
__attribute__ ((used, aligned (4), section (".note.ABI-tag")))
|
|
static const struct
|
|
{
|
|
ElfW(Nhdr) nhdr;
|
|
char name[4];
|
|
int32_t desc[4];
|
|
} __abi_tag = {
|
|
{ .n_namesz = sizeof __abi_tag.name,
|
|
.n_descsz = sizeof __abi_tag.desc,
|
|
.n_type = 1 },
|
|
"GNU",
|
|
{ __ABI_TAG_OS, __ABI_TAG_VERSION }
|
|
};
|