Subversion Repositories openrisc_2011-10-31

/* General Solaris system support.

   Copyright (C) 2004, 2005 , 2007, 2010 Free Software Foundation, Inc.

   Contributed by CodeSourcery, LLC.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

GCC 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 General Public License for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tree.h"

#include "output.h"

#include "tm.h"

#include "rtl.h"

#include "tm_p.h"

#include "toplev.h"

#include "ggc.h"

tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis;

/* Attach any pending attributes for DECL to the list in *ATTRIBUTES.

   Pending attributes come from #pragma or _Pragma, so this code is

   only useful in the C family front ends, but it is included in

   all languages to avoid changing the target machine initializer

   depending on the language.  */

void

solaris_insert_attributes (tree decl, tree *attributes)

{

  tree *x, next;

  if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL)

    for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x))

      {

        tree name = TREE_PURPOSE (*x);

        tree value = TREE_VALUE (*x);

        if (DECL_NAME (decl) == name)

          {

            if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl))

                || lookup_attribute ("aligned", *attributes))

              warning (0, "ignoring %<#pragma align%> for explicitly "

                       "aligned %q+D", decl);

            else

              *attributes = tree_cons (get_identifier ("aligned"), value,

                                       *attributes);

            next = TREE_CHAIN (*x);

            ggc_free (*x);

            *x = next;

            break;

          }

      }

  if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL)

    for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x))

      {

        tree name = TREE_PURPOSE (*x);

        if (DECL_NAME (decl) == name)

          {

            *attributes = tree_cons (get_identifier ("init"), NULL,

                                     *attributes);

            TREE_USED (decl) = 1;

            DECL_PRESERVE_P (decl) = 1;

            next = TREE_CHAIN (*x);

            ggc_free (*x);

            *x = next;

            break;

          }

      }

  if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL)

    for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x))

      {

        tree name = TREE_PURPOSE (*x);

        if (DECL_NAME (decl) == name)

          {

            *attributes = tree_cons (get_identifier ("fini"), NULL,

                                     *attributes);

            TREE_USED (decl) = 1;

            DECL_PRESERVE_P (decl) = 1;

            next = TREE_CHAIN (*x);

            ggc_free (*x);

            *x = next;

            break;

          }

      }

}

/* Output initializer or finalizer entries for DECL to FILE.  */

void

solaris_output_init_fini (FILE *file, tree decl)

{

  if (lookup_attribute ("init", DECL_ATTRIBUTES (decl)))

    {

      fprintf (file, PUSHSECTION_FORMAT, ".init");

      ASM_OUTPUT_CALL (file, decl);

      fprintf (file, "\t.popsection\n");

    }

  if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl)))

    {

      fprintf (file, PUSHSECTION_FORMAT, ".fini");

      ASM_OUTPUT_CALL (file, decl);

      fprintf (file, "\t.popsection\n");

    }

}

/* Emit an assembler directive to set symbol for DECL visibility to

   the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */

void

solaris_assemble_visibility (tree decl ATTRIBUTE_UNUSED,

                             int vis ATTRIBUTE_UNUSED)

{

#ifdef HAVE_GAS_HIDDEN

  /* Sun as uses .symbolic for STV_PROTECTED.  STV_INTERNAL is marked as

     `currently reserved', but the linker treats it like STV_HIDDEN.  Sun

     Studio 12.1 cc emits .hidden instead.

     There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED,

     STV_SINGLETON, and STV_ELIMINATE.

     See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining

     Additional Symbols with a mapfile,

     http://docs.sun.com/app/docs/doc/819-0690/gdzmc?a=view

     and Ch. 7, Object-File Format, Symbol Table Section,

     http://docs.sun.com/app/docs/doc/819-0690/chapter6-79797?a=view  */

  static const char * const visibility_types[] = {

    NULL, "symbolic", "hidden", "hidden"

  };

  const char *name, *type;

  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));

  type = visibility_types[vis];

  fprintf (asm_out_file, "\t.%s\t", type);

  assemble_name (asm_out_file, name);

  fprintf (asm_out_file, "\n");

#else

  warning (OPT_Wattributes, "visibility attribute not supported "

           "in this configuration; ignored");

#endif

}