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tile: Remove elf/ and create crti.S/crtn.S
This patches fixes up the tile startup files, moving elf/start.S up a directory level and implementing the required crti.S and crtn.S files based on the old initfini.c compiler output (hand-optimized to bum a couple of cycles).
This commit is contained in:
Chris Metcalf
parent
ec0001e175
commit
538c451b2b
@ -1,3 +1,14 @@
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2012-05-12 Chris Metcalf <cmetcalf@tilera.com>
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* sysdeps/tile/crti.S: New file, based on compiler output
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for sysdeps/generic/initfini.c.
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* sysdeps/tile/crtn.S: Likewise.
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* sysdeps/tile/Makefile (CFLAGS-initfini.s): Remove variable.
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* sysdeps/unix/sysv/linux/tile/nptl/Makefile
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(CFLAGS-pt-initfini.s): Likewise.
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* sysdeps/tile/elf/start.S: Moved to ...
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* sysdeps/tile/start.S: ...here.
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2012-04-15 Mike Frysinger <vapier@gentoo.org>
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* sysdeps/unix/sysv/linux/tile/tilegx/register-dump.h: Include
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@ -11,8 +11,3 @@ ifeq ($(subdir),elf)
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# Extra shared linker files to link only into dl-allobjs.so.
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sysdep-rtld-routines += dl-start __tls_get_addr
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endif
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ifeq ($(subdir),csu)
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# Avoid .cfi_startproc/endproc markers when creating init and fini pieces.
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CFLAGS-initfini.s += -fno-asynchronous-unwind-tables
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endif
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111
sysdeps/tile/crti.S
Normal file
111
sysdeps/tile/crti.S
Normal file
@ -0,0 +1,111 @@
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/* Special .init and .fini section support for tile.
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Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
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possible to release a modified version which carries forward this
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exception.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* crti.S puts a function prologue at the beginning of the .init and
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.fini sections and defines global symbols for those addresses, so
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they can be called as functions. The symbols _init and _fini are
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magic and cause the linker to emit DT_INIT and DT_FINI. */
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#include <libc-symbols.h>
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#include <sysdep.h>
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#ifndef PREINIT_FUNCTION
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# define PREINIT_FUNCTION __gmon_start__
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#endif
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#ifndef PREINIT_FUNCTION_WEAK
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# define PREINIT_FUNCTION_WEAK 1
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#endif
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#if PREINIT_FUNCTION_WEAK
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weak_extern (PREINIT_FUNCTION)
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#else
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.hidden PREINIT_FUNCTION
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#endif
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.section .init,"ax",@progbits
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.align 8
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.globl _init
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.type _init, @function
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_init:
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{
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move r29, sp
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ADDI_PTR r28, sp, -REGSIZE
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ST sp, lr
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}
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ADDI_PTR sp, sp, -(2 * REGSIZE)
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ST r28, r29
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#if PREINIT_FUNCTION_WEAK
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lnk r2
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0:
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#ifdef __tilegx__
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{
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moveli r1, hw1_last(_GLOBAL_OFFSET_TABLE_ - 0b)
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moveli r0, hw1_last_got(PREINIT_FUNCTION)
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}
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{
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shl16insli r1, r1, hw0(_GLOBAL_OFFSET_TABLE_ - 0b)
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shl16insli r0, r0, hw0_got(PREINIT_FUNCTION)
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}
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#else
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{
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moveli r1, lo16(_GLOBAL_OFFSET_TABLE_ - 0b)
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moveli r0, got_lo16(PREINIT_FUNCTION)
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}
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{
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auli r1, r1, ha16(_GLOBAL_OFFSET_TABLE_ - 0b)
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auli r0, r0, got_ha16(PREINIT_FUNCTION)
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}
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#endif
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ADD_PTR r0, r0, r1
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ADD_PTR r0, r0, r2
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LD_PTR r0, r0
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BEQZ r0, .Lno_weak_fn
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#endif
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jal plt(PREINIT_FUNCTION)
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.Lno_weak_fn:
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.section .fini,"ax",@progbits
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.align 8
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.globl _fini
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.type _fini, @function
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_fini:
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{
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move r29, sp
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ADDI_PTR r28, sp, -REGSIZE
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ST sp, lr
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}
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ADDI_PTR sp, sp, -(2 * REGSIZE)
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ST r28, r29
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55
sysdeps/tile/crtn.S
Normal file
55
sysdeps/tile/crtn.S
Normal file
@ -0,0 +1,55 @@
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/* Special .init and .fini section support for tile.
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Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
|
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possible to release a modified version which carries forward this
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exception.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* crtn.S puts function epilogues in the .init and .fini sections
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corresponding to the prologues in crti.S. */
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#include <sysdep.h>
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.section .init,"ax",@progbits
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ADDI_PTR r29, sp, (2 * REGSIZE)
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{
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ADDI_PTR sp, sp, (2 * REGSIZE)
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LD lr, r29
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}
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jrp lr
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.section .fini,"ax",@progbits
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ADDI_PTR r29, sp, (2 * REGSIZE)
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{
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ADDI_PTR sp, sp, (2 * REGSIZE)
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LD lr, r29
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}
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jrp lr
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@ -1,7 +1,2 @@
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# pull in __syscall_error routine
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libpthread-routines += sysdep
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ifeq ($(subdir),nptl)
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# Avoid .cfi_startproc/endproc markers when creating init and fini pieces.
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CFLAGS-pt-initfini.s += -fno-asynchronous-unwind-tables
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endif
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