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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [frv/] [frvbegin.c] - Blame information for rev 282

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1 282 jeremybenn
/* Frv initialization file linked before all user modules
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   Copyright (C) 1999, 2000, 2003, 2004, 2009 Free Software Foundation, Inc.
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    Contributed by Red Hat, Inc.
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   This file is part of GCC.
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   GCC is free software ; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3, or (at your option)
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   any later version.
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   GCC 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
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   GNU General Public License for more details.
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   Under Section 7 of GPL version 3, you are granted additional
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   permissions described in the GCC Runtime Library Exception, version
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   3.1, as published by the Free Software Foundation.
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   You should have received a copy of the GNU General Public License and
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   a copy of the GCC Runtime Library Exception along with this program;
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   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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   <http://www.gnu.org/licenses/>.
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   This file was originally taken from the file crtstuff.c in the
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   main compiler directory, and simplified.  */
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#include "defaults.h"
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#include <stddef.h>
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#include "unwind-dw2-fde.h"
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#include "gbl-ctors.h"
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/*  Declare a pointer to void function type.  */
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#define STATIC static
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#ifdef __FRV_UNDERSCORE__
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#define UNDERSCORE "_"
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#else
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#define UNDERSCORE ""
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#endif
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#define INIT_SECTION_NEG_ONE(SECTION, FLAGS, NAME)                      \
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__asm__ (".section " SECTION "," FLAGS "\n\t"                           \
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         ".globl   " UNDERSCORE NAME "\n\t"                             \
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         ".type    " UNDERSCORE NAME ",@object\n\t"                     \
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         ".p2align  2\n"                                                \
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         UNDERSCORE NAME ":\n\t"                                        \
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         ".word     -1\n\t"                                             \
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         ".previous")
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#define INIT_SECTION(SECTION, FLAGS, NAME)                              \
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__asm__ (".section " SECTION "," FLAGS "\n\t"                           \
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         ".globl   " UNDERSCORE NAME "\n\t"                             \
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         ".type    " UNDERSCORE NAME ",@object\n\t"                     \
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         ".p2align  2\n"                                                \
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         UNDERSCORE NAME ":\n\t"                                        \
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         ".previous")
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/* Beginning of .ctor/.dtor sections that provides a list of constructors and
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   destructors to run.  */
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INIT_SECTION_NEG_ONE (".ctors", "\"aw\"", "__CTOR_LIST__");
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INIT_SECTION_NEG_ONE (".dtors", "\"aw\"", "__DTOR_LIST__");
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/* Beginning of .eh_frame section that provides all of the exception handling
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   tables.  */
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INIT_SECTION (".eh_frame", "\"aw\"", "__EH_FRAME_BEGIN__");
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#if ! __FRV_FDPIC__
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/* In FDPIC, the linker itself generates this.  */
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/* Beginning of .rofixup section that provides a list of pointers that we
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   need to adjust.  */
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INIT_SECTION (".rofixup", "\"a\"", "__ROFIXUP_LIST__");
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#endif /* __FRV_FDPIC__ */
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extern void __frv_register_eh(void) __attribute__((__constructor__));
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extern void __frv_deregister_eh(void) __attribute__((__destructor__));
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extern func_ptr __EH_FRAME_BEGIN__[];
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/* Register the exception handling table as the first constructor.  */
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void
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__frv_register_eh (void)
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{
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  static struct object object;
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  if (__register_frame_info)
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    __register_frame_info (__EH_FRAME_BEGIN__, &object);
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}
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/* Note, do not declare __{,de}register_frame_info weak as it seems
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   to interfere with the pic support.  */
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/* Unregister the exception handling table as a deconstructor.  */
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void
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__frv_deregister_eh (void)
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{
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  static int completed = 0;
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  if (completed)
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    return;
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  if (__deregister_frame_info)
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    __deregister_frame_info (__EH_FRAME_BEGIN__);
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  completed = 1;
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}
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/* Run the global destructors.  */
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void
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__do_global_dtors (void)
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{
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  static func_ptr *p = __DTOR_LIST__ + 1;
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  while (*p)
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    {
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      p++;
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      (*(p-1)) ();
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    }
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}
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/* Run the global constructors.  */
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void
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__do_global_ctors (void)
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{
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  unsigned long nptrs = (unsigned long) __CTOR_LIST__[0];
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  unsigned i;
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  if (nptrs == (unsigned long)-1)
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    for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++);
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  for (i = nptrs; i >= 1; i--)
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    __CTOR_LIST__[i] ();
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  atexit (__do_global_dtors);
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}
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/* Subroutine called automatically by `main'.
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   Compiling a global function named `main'
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   produces an automatic call to this function at the beginning.
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   For many systems, this routine calls __do_global_ctors.
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   For systems which support a .init section we use the .init section
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   to run __do_global_ctors, so we need not do anything here.  */
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void
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__main (void)
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{
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  /* Support recursive calls to `main': run initializers just once.  */
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  static int initialized;
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  if (! initialized)
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    {
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      initialized = 1;
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      __do_global_ctors ();
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    }
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}

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