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Provide crt[in].S for x86-64.
This commit is contained in:
Marek Polacek
parent
2a979d3a14
commit
ed656b4065
@ -1,3 +1,9 @@
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2012-02-14 Marek Polacek <polacek@redhat.com>
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* sysdeps/x86_64/crti.S: New file.
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* sysdeps/x86_64/crtn.S: New file.
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* sysdeps/x86_64/elf/initfini.c: Remove file.
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2012-02-13 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/unix/sysv/linux/bits/inotify.h: New file.
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@ -1,5 +1,5 @@
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/* Special .init and .fini section support for x86-64.
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Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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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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@ -33,75 +33,48 @@
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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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/* This file is compiled into assembly code which is then munged by a sed
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script into two files: crti.s and crtn.s.
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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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* crti.s puts a function prologue at the beginning of the
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.init and .fini sections and defines global symbols for
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those addresses, so they can be called as functions.
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#include <libc-symbols.h>
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#include <sysdep.h>
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* crtn.s puts the corresponding function epilogues
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in the .init and .fini sections. */
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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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__asm__ ("\n\
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#include \"defs.h\"\n\
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\n\
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/*@HEADER_ENDS*/\n\
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\n\
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/*@_init_PROLOG_BEGINS*/\n\
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.align 4\n\
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.type call_gmon_start,@function\n\
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call_gmon_start:\n\
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subq $8, %rsp\n\
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movq __gmon_start__@GOTPCREL(%rip), %rax\n\
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testq %rax, %rax\n\
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je .L22\n\
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call *%rax\n\
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.L22:\n\
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addq $8, %rsp\n\
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ret\n\
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\n\
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.section .init\n\
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.align 4\n\
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.globl _init\n\
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.type _init,@function\n\
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_init:\n\
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subq $8, %rsp\n\
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call call_gmon_start\n\
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ALIGN\n\
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END_INIT\n\
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\n\
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/*@_init_PROLOG_ENDS*/\n\
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\n\
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/*@_init_EPILOG_BEGINS*/\n\
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.section .init\n\
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addq $8, %rsp\n\
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ret\n\
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END_INIT\n\
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\n\
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/*@_init_EPILOG_ENDS*/\n\
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\n\
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/*@_fini_PROLOG_BEGINS*/\n\
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.section .fini\n\
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.align 4\n\
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.globl _fini\n\
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.type _fini,@function\n\
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_fini:\n\
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subq $8, %rsp\n\
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ALIGN\n\
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END_FINI\n\
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\n\
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/*@_fini_PROLOG_ENDS*/\n\
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call i_am_not_a_leaf@PLT\n\
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\n\
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/*@_fini_EPILOG_BEGINS*/\n\
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.section .fini\n\
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addq $8, %rsp\n\
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ret\n\
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END_FINI\n\
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\n\
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/*@_fini_EPILOG_ENDS*/\n\
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\n\
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/*@TRAILER_BEGINS*/\n\
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.weak __gmon_start__\n\
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");
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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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.p2align 2
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.globl _init
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.type _init, @function
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_init:
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/* Maintain 16-byte stack alignment for called functions. */
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subq $8, %rsp
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#if PREINIT_FUNCTION_WEAK
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movq PREINIT_FUNCTION@GOTPCREL(%rip), %rax
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testq %rax, %rax
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je .Lno_weak_fn
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call PREINIT_FUNCTION@PLT
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.Lno_weak_fn:
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#else
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call PREINIT_FUNCTION
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#endif
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.section .fini,"ax",@progbits
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.p2align 2
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.globl _fini
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.type _fini, @function
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_fini:
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subq $8, %rsp
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45
sysdeps/x86_64/crtn.S
Normal file
45
sysdeps/x86_64/crtn.S
Normal file
@ -0,0 +1,45 @@
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/* Special .init and .fini section support for x86-64.
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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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.section .init,"ax",@progbits
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addq $8, %rsp
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ret
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.section .fini,"ax",@progbits
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addq $8, %rsp
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ret
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