mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
161 lines
4.1 KiB
ArmAsm
161 lines
4.1 KiB
ArmAsm
/* Special .init and .fini section support for IA64.
|
|
Copyright (C) 2000-2017 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>
|
|
#undef ret
|
|
|
|
#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 we have working .init_array support, we want to keep the .init
|
|
section empty (apart from the mandatory prologue/epilogue. This
|
|
ensures that the default unwind conventions (return-pointer in b0,
|
|
frame state in ar.pfs, etc.) will do the Right Thing. To ensure
|
|
an empty .init section, we register gmon_initializer() via the
|
|
.init_array.
|
|
|
|
--davidm 02/10/29 */
|
|
|
|
#if PREINIT_FUNCTION_WEAK
|
|
/* This blob of assembly code is one simple C function:
|
|
|
|
static void
|
|
__attribute__ ((used))
|
|
gmon_initializer (void)
|
|
{
|
|
extern void weak_function __gmon_start__ (void);
|
|
|
|
if (__gmon_start__)
|
|
(*__gmon_start__)();
|
|
}
|
|
*/
|
|
.text
|
|
.align 64
|
|
.proc gmon_initializer#
|
|
gmon_initializer:
|
|
.prologue 12, 32
|
|
.mmi
|
|
.save ar.pfs, r33
|
|
alloc r33 = ar.pfs, 0, 3, 0, 0
|
|
addl r14 = @ltoff(@fptr(PREINIT_FUNCTION#)), gp
|
|
.save rp, r32
|
|
mov r32 = b0
|
|
.mmi
|
|
mov r34 = r1
|
|
.body
|
|
;;
|
|
ld8 r14 = [r14]
|
|
nop 0
|
|
;;
|
|
.mib
|
|
cmp.eq p6, p7 = 0, r14
|
|
nop 0
|
|
(p6) br.cond.spnt .L1
|
|
;;
|
|
.mib
|
|
nop 0
|
|
nop 0
|
|
br.call.sptk.many b0 = PREINIT_FUNCTION#
|
|
;;
|
|
.mmi
|
|
mov r1 = r34
|
|
nop 0
|
|
nop 0
|
|
.L1:
|
|
.mii
|
|
nop 0
|
|
mov ar.pfs = r33
|
|
nop 0
|
|
;;
|
|
.mib
|
|
nop 0
|
|
mov b0 = r32
|
|
br.ret.sptk.many b0
|
|
.endp gmon_initializer#
|
|
# undef PREINIT_FUNCTION
|
|
# define PREINIT_FUNCTION gmon_initializer
|
|
#endif
|
|
.section .init_array, "aw"
|
|
data8 @fptr(PREINIT_FUNCTION)
|
|
|
|
.section .init,"ax",@progbits
|
|
.global _init#
|
|
.proc _init#
|
|
_init:
|
|
.prologue
|
|
.save ar.pfs, r34
|
|
alloc r34 = ar.pfs, 0, 3, 0, 0
|
|
.vframe r32
|
|
mov r32 = r12
|
|
.save rp, r33
|
|
mov r33 = b0
|
|
.body
|
|
adds r12 = -16, r12
|
|
;; /* see gmon_initializer() above */
|
|
.endp _init#
|
|
|
|
.section .fini,"ax",@progbits
|
|
.global _fini#
|
|
.proc _fini#
|
|
_fini:
|
|
.prologue
|
|
.save ar.pfs, r34
|
|
alloc r34 = ar.pfs, 0, 3, 0, 0
|
|
.vframe r32
|
|
mov r32 = r12
|
|
.save rp, r33
|
|
mov r33 = b0
|
|
.body
|
|
adds r12 = -16, r12
|
|
;;
|
|
.endp _fini#
|