mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
104 lines
3.0 KiB
ArmAsm
104 lines
3.0 KiB
ArmAsm
/* Special .init and .fini section support for AArch64.
|
|
Copyright (C) 1995-2024 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 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
|
|
<https://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 <sysdep.h>
|
|
#include <libc-symbols.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
|
|
|
|
#if PREINIT_FUNCTION_WEAK
|
|
.align 2
|
|
.type call_weak_fn, %function
|
|
call_weak_fn:
|
|
adrp x0, :got:PREINIT_FUNCTION
|
|
ldr PTR_REG (0), [x0, #:got_lo12:PREINIT_FUNCTION]
|
|
cbz x0, 1f
|
|
b PREINIT_FUNCTION
|
|
1:
|
|
RET
|
|
.size call_weak_fn, .-call_weak_fn
|
|
#endif
|
|
|
|
.section .init,"ax",%progbits
|
|
.align 2
|
|
.global _init
|
|
.hidden _init
|
|
.type _init, %function
|
|
_init:
|
|
#if HAVE_AARCH64_PAC_RET
|
|
PACIASP
|
|
#else
|
|
BTI_C
|
|
#endif
|
|
stp x29, x30, [sp, -16]!
|
|
mov x29, sp
|
|
#if PREINIT_FUNCTION_WEAK
|
|
bl call_weak_fn
|
|
#else
|
|
bl PREINIT_FUNCTION
|
|
#endif
|
|
|
|
.section .fini,"ax",%progbits
|
|
.align 2
|
|
.global _fini
|
|
.hidden _fini
|
|
.type _fini, %function
|
|
_fini:
|
|
#if HAVE_AARCH64_PAC_RET
|
|
PACIASP
|
|
#else
|
|
BTI_C
|
|
#endif
|
|
stp x29, x30, [sp, -16]!
|
|
mov x29, sp
|