mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 13:10:29 +00:00
67c0579669
_init and _fini are special functions provided by glibc for linker to define DT_INIT and DT_FINI in executable and shared library. They should never be put in dynamic symbol table. This patch marks them as hidden to remove them from dynamic symbol table. Tested with build-many-glibcs.py. [BZ #23145] * elf/Makefile (tests-special): Add $(objpfx)check-initfini.out. ($(all-built-dso:=.dynsym): New target. (common-generated): Add $(all-built-dso:$(common-objpfx)%=%.dynsym). ($(objpfx)check-initfini.out): New target. (generated): Add check-initfini.out. * scripts/check-initfini.awk: New file. * sysdeps/aarch64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/alpha/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/arm/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/hppa/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/i386/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/ia64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/m68k/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/microblaze/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips64/n32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips64/n64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/nios2/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/powerpc/powerpc32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/powerpc/powerpc64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/s390/s390-32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/s390/s390-64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/sh/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/sparc/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/x86_64/crti.S (_init): Mark as hidden. (_fini): Likewise.
105 lines
3.0 KiB
ArmAsm
105 lines
3.0 KiB
ArmAsm
/* Special .init and .fini section support for S/390.
|
|
Copyright (C) 2000-2018 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 GNU 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.)
|
|
|
|
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.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* 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. */
|
|
|
|
#include <libc-symbols.h>
|
|
#include <sysdep.h>
|
|
|
|
#ifndef PREINIT_FUNCTION
|
|
# define PREINIT_FUNCTION __gmon_start__
|
|
#endif
|
|
|
|
#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
|
|
.globl _init
|
|
.hidden _init
|
|
.type _init,@function
|
|
.align 4
|
|
_init:
|
|
stm %r6,%r15,24(%r15)
|
|
bras %r13,1f
|
|
0:
|
|
#if PREINIT_FUNCTION_WEAK
|
|
.long PREINIT_FUNCTION@GOT
|
|
#else
|
|
.long PREINIT_FUNCTION-0b
|
|
#endif
|
|
.long _GLOBAL_OFFSET_TABLE_-0b
|
|
1: lr %r1,%r15
|
|
ahi %r15,-96
|
|
st %r1,0(%r15)
|
|
l %r12,4(%r13)
|
|
ar %r12,%r13
|
|
l %r1,0(%r13)
|
|
#if PREINIT_FUNCTION_WEAK
|
|
l %r1,0(%r1,%r12)
|
|
ltr %r1,%r1
|
|
je 2f
|
|
#else
|
|
la %r1,0(%r1,%r13)
|
|
#endif
|
|
basr %r14,%r1
|
|
.align 4,0x07
|
|
2:
|
|
|
|
.section .fini,"ax",@progbits
|
|
.globl _fini
|
|
.hidden _fini
|
|
.type _fini,@function
|
|
.align 4
|
|
_fini:
|
|
stm %r6,%r15,24(%r15)
|
|
bras %r13,1f
|
|
0: .long _GLOBAL_OFFSET_TABLE_-0b
|
|
1: lr %r1,%r15
|
|
ahi %r15,-96
|
|
st %r1,0(%r15)
|
|
l %r12,0(%r13)
|
|
ar %r12,%r13
|
|
.align 4,0x07
|