2001-09-19 10:37:31 +00:00
|
|
|
/* Special .init and .fini section support for x86-64.
|
2013-01-02 19:01:50 +00:00
|
|
|
Copyright (C) 2012-2013 Free Software Foundation, Inc.
|
2001-09-19 10:37:31 +00:00
|
|
|
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
|
2004-08-16 04:51:23 +00:00
|
|
|
coming from the use of this file. (The GNU Lesser General Public
|
2001-09-19 10:37:31 +00:00
|
|
|
License restrictions do apply in other respects; for example, they
|
|
|
|
|
cover modification of the file, and distribution when not linked
|
|
|
|
|
into another program.)
|
|
|
|
|
|
2004-08-16 04:51:23 +00:00
|
|
|
Note that people who make modified versions of this file are not
|
|
|
|
|
obligated to grant this special exception for their modified
|
|
|
|
|
versions; it is their choice whether to do so. The GNU Lesser
|
|
|
|
|
General Public License gives permission to release a modified
|
|
|
|
|
version without this exception; this exception also makes it
|
|
|
|
|
possible to release a modified version which carries forward this
|
|
|
|
|
exception.
|
|
|
|
|
|
2001-09-19 10:37:31 +00:00
|
|
|
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
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2001-09-19 10:37:31 +00:00
|
|
|
|
2012-02-14 12:50:44 +00:00
|
|
|
/* crti.S puts a function prologue at the beginning of the .init and
|
|
|
|
|
.fini sections and defines global symbols for those addresses, so
|
|
|
|
|
they can be called as functions. The symbols _init and _fini are
|
|
|
|
|
magic and cause the linker to emit DT_INIT and DT_FINI. */
|
2001-09-19 10:37:31 +00:00
|
|
|
|
2012-02-14 12:50:44 +00:00
|
|
|
#include <libc-symbols.h>
|
|
|
|
|
#include <sysdep.h>
|
2001-09-19 10:37:31 +00:00
|
|
|
|
2012-02-14 12:50:44 +00:00
|
|
|
#ifndef PREINIT_FUNCTION
|
|
|
|
|
# define PREINIT_FUNCTION __gmon_start__
|
|
|
|
|
#endif
|
2001-09-19 10:37:31 +00:00
|
|
|
|
2012-02-14 12:50:44 +00:00
|
|
|
#ifndef PREINIT_FUNCTION_WEAK
|
|
|
|
|
# define PREINIT_FUNCTION_WEAK 1
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if PREINIT_FUNCTION_WEAK
|
|
|
|
|
weak_extern (PREINIT_FUNCTION)
|
|
|
|
|
#else
|
|
|
|
|
.hidden PREINIT_FUNCTION
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
.section .init,"ax",@progbits
|
|
|
|
|
.p2align 2
|
|
|
|
|
.globl _init
|
|
|
|
|
.type _init, @function
|
|
|
|
|
_init:
|
|
|
|
|
/* Maintain 16-byte stack alignment for called functions. */
|
|
|
|
|
subq $8, %rsp
|
|
|
|
|
#if PREINIT_FUNCTION_WEAK
|
|
|
|
|
movq PREINIT_FUNCTION@GOTPCREL(%rip), %rax
|
|
|
|
|
testq %rax, %rax
|
|
|
|
|
je .Lno_weak_fn
|
|
|
|
|
call PREINIT_FUNCTION@PLT
|
|
|
|
|
.Lno_weak_fn:
|
|
|
|
|
#else
|
|
|
|
|
call PREINIT_FUNCTION
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
.section .fini,"ax",@progbits
|
|
|
|
|
.p2align 2
|
|
|
|
|
.globl _fini
|
|
|
|
|
.type _fini, @function
|
|
|
|
|
_fini:
|
|
|
|
|
subq $8, %rsp
|
