sol2.c revision 1.1.1.1.4.2 
1/* General Solaris system support.
2   Copyright (C) 2004, 2005 , 2007, 2010 Free Software Foundation, Inc.
3   Contributed by CodeSourcery, LLC.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along 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 "toplev.h"
30#include "ggc.h"
31
32tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis;
33
34/* Attach any pending attributes for DECL to the list in *ATTRIBUTES.
35   Pending attributes come from #pragma or _Pragma, so this code is
36   only useful in the C family front ends, but it is included in
37   all languages to avoid changing the target machine initializer
38   depending on the language.  */
39
40void
41solaris_insert_attributes (tree decl, tree *attributes)
42{
43  tree *x, next;
44
45  if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL)
46    for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x))
47      {
48	tree name = TREE_PURPOSE (*x);
49	tree value = TREE_VALUE (*x);
50	if (DECL_NAME (decl) == name)
51	  {
52	    if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl))
53		|| lookup_attribute ("aligned", *attributes))
54	      warning (0, "ignoring %<#pragma align%> for explicitly "
55		       "aligned %q+D", decl);
56	    else
57	      *attributes = tree_cons (get_identifier ("aligned"), value,
58				       *attributes);
59	    next = TREE_CHAIN (*x);
60	    ggc_free (*x);
61	    *x = next;
62	    break;
63	  }
64      }
65
66  if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL)
67    for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x))
68      {
69	tree name = TREE_PURPOSE (*x);
70	if (DECL_NAME (decl) == name)
71	  {
72	    *attributes = tree_cons (get_identifier ("init"), NULL,
73				     *attributes);
74	    TREE_USED (decl) = 1;
75	    DECL_PRESERVE_P (decl) = 1;
76	    next = TREE_CHAIN (*x);
77	    ggc_free (*x);
78	    *x = next;
79	    break;
80	  }
81      }
82
83  if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL)
84    for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x))
85      {
86	tree name = TREE_PURPOSE (*x);
87	if (DECL_NAME (decl) == name)
88	  {
89	    *attributes = tree_cons (get_identifier ("fini"), NULL,
90				     *attributes);
91	    TREE_USED (decl) = 1;
92	    DECL_PRESERVE_P (decl) = 1;
93	    next = TREE_CHAIN (*x);
94	    ggc_free (*x);
95	    *x = next;
96	    break;
97	  }
98      }
99}
100
101/* Output initializer or finalizer entries for DECL to FILE.  */
102
103void
104solaris_output_init_fini (FILE *file, tree decl)
105{
106  if (lookup_attribute ("init", DECL_ATTRIBUTES (decl)))
107    {
108      fprintf (file, PUSHSECTION_FORMAT, ".init");
109      ASM_OUTPUT_CALL (file, decl);
110      fprintf (file, "\t.popsection\n");
111    }
112
113  if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl)))
114    {
115      fprintf (file, PUSHSECTION_FORMAT, ".fini");
116      ASM_OUTPUT_CALL (file, decl);
117      fprintf (file, "\t.popsection\n");
118    }
119}
120
121/* Emit an assembler directive to set symbol for DECL visibility to
122   the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */
123
124void
125solaris_assemble_visibility (tree decl ATTRIBUTE_UNUSED,
126			     int vis ATTRIBUTE_UNUSED)
127{
128#ifdef HAVE_GAS_HIDDEN
129  /* Sun as uses .symbolic for STV_PROTECTED.  STV_INTERNAL is marked as
130     `currently reserved', but the linker treats it like STV_HIDDEN.  Sun
131     Studio 12.1 cc emits .hidden instead.
132
133     There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED,
134     STV_SINGLETON, and STV_ELIMINATE.
135
136     See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining
137     Additional Symbols with a mapfile,
138     http://docs.sun.com/app/docs/doc/819-0690/gdzmc?a=view
139     and Ch. 7, Object-File Format, Symbol Table Section,
140     http://docs.sun.com/app/docs/doc/819-0690/chapter6-79797?a=view  */
141
142  static const char * const visibility_types[] = {
143    NULL, "symbolic", "hidden", "hidden"
144  };
145
146  const char *name, *type;
147
148  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
149  type = visibility_types[vis];
150
151  fprintf (asm_out_file, "\t.%s\t", type);
152  assemble_name (asm_out_file, name);
153  fprintf (asm_out_file, "\n");
154#else
155  warning (OPT_Wattributes, "visibility attribute not supported "
156	   "in this configuration; ignored");
157#endif
158}
159