gcc/config/sol2.c

   1 /* General Solaris system support.
   2    Copyright (C) 2004, 2005 , 2007, 2010 Free Software Foundation, Inc.
   3    Contributed by CodeSourcery, LLC.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tree.h"
  25 #include "output.h"
  26 #include "tm.h"
  27 #include "rtl.h"
  28 #include "tm_p.h"
  29 #include "diagnostic-core.h"
  30 #include "toplev.h"
  31 #include "ggc.h"
  32
  33 tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis;
  34
  35 /* Attach any pending attributes for DECL to the list in *ATTRIBUTES.
  36    Pending attributes come from #pragma or _Pragma, so this code is
  37    only useful in the C family front ends, but it is included in
  38    all languages to avoid changing the target machine initializer
  39    depending on the language.  */
  40
  41 void
  42 solaris_insert_attributes (tree decl, tree *attributes)
  43 {
  44   tree *x, next;
  45
  46   if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL)
  47     for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x))
  48       {
  49         tree name = TREE_PURPOSE (*x);
  50         tree value = TREE_VALUE (*x);
  51         if (DECL_NAME (decl) == name)
  52           {
  53             if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl))
  54                 || lookup_attribute ("aligned", *attributes))
  55               warning (0, "ignoring %<#pragma align%> for explicitly "
  56                        "aligned %q+D", decl);
  57             else
  58               *attributes = tree_cons (get_identifier ("aligned"), value,
  59                                        *attributes);
  60             next = TREE_CHAIN (*x);
  61             ggc_free (*x);
  62             *x = next;
  63             break;
  64           }
  65       }
  66
  67   if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL)
  68     for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x))
  69       {
  70         tree name = TREE_PURPOSE (*x);
  71         if (DECL_NAME (decl) == name)
  72           {
  73             *attributes = tree_cons (get_identifier ("init"), NULL,
  74                                      *attributes);
  75             TREE_USED (decl) = 1;
  76             DECL_PRESERVE_P (decl) = 1;
  77             next = TREE_CHAIN (*x);
  78             ggc_free (*x);
  79             *x = next;
  80             break;
  81           }
  82       }
  83
  84   if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL)
  85     for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x))
  86       {
  87         tree name = TREE_PURPOSE (*x);
  88         if (DECL_NAME (decl) == name)
  89           {
  90             *attributes = tree_cons (get_identifier ("fini"), NULL,
  91                                      *attributes);
  92             TREE_USED (decl) = 1;
  93             DECL_PRESERVE_P (decl) = 1;
  94             next = TREE_CHAIN (*x);
  95             ggc_free (*x);
  96             *x = next;
  97             break;
  98           }
  99       }
 100 }
 101
 102 /* Output initializer or finalizer entries for DECL to FILE.  */
 103
 104 void
 105 solaris_output_init_fini (FILE *file, tree decl)
 106 {
 107   if (lookup_attribute ("init", DECL_ATTRIBUTES (decl)))
 108     {
 109       fprintf (file, PUSHSECTION_FORMAT, ".init");
 110       ASM_OUTPUT_CALL (file, decl);
 111       fprintf (file, "\t.popsection\n");
 112     }
 113
 114   if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl)))
 115     {
 116       fprintf (file, PUSHSECTION_FORMAT, ".fini");
 117       ASM_OUTPUT_CALL (file, decl);
 118       fprintf (file, "\t.popsection\n");
 119     }
 120 }
 121
 122 /* Emit an assembler directive to set symbol for DECL visibility to
 123    the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */
 124
 125 void
 126 solaris_assemble_visibility (tree decl ATTRIBUTE_UNUSED,
 127                              int vis ATTRIBUTE_UNUSED)
 128 {
 129 #ifdef HAVE_GAS_HIDDEN
 130   /* Sun as uses .symbolic for STV_PROTECTED.  STV_INTERNAL is marked as
 131      `currently reserved', but the linker treats it like STV_HIDDEN.  Sun
 132      Studio 12.1 cc emits .hidden instead.
 133
 134      There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED,
 135      STV_SINGLETON, and STV_ELIMINATE.
 136
 137      See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining
 138      Additional Symbols with a mapfile,
 139      http://docs.sun.com/app/docs/doc/819-0690/gdzmc?a=view
 140      and Ch. 7, Object-File Format, Symbol Table Section,
 141      http://docs.sun.com/app/docs/doc/819-0690/chapter6-79797?a=view  */
 142
 143   static const char * const visibility_types[] = {
 144     NULL, "symbolic", "hidden", "hidden"
 145   };
 146
 147   const char *name, *type;
 148
 149   name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
 150   type = visibility_types[vis];
 151
 152   fprintf (asm_out_file, "\t.%s\t", type);
 153   assemble_name (asm_out_file, name);
 154   fprintf (asm_out_file, "\n");
 155 #else
 156   warning (OPT_Wattributes, "visibility attribute not supported "
 157            "in this configuration; ignored");
 158 #endif
 159 }