OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [config/] [vxworks.c] - Blame information for rev 709

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 709 jeremybenn
/* Common VxWorks target definitions for GNU compiler.
2
   Copyright (C) 2007, 2008, 2010
3
   Free Software Foundation, Inc.
4
   Contributed by CodeSourcery, Inc.
5
 
6
This file is part of GCC.
7
 
8
GCC is free software; you can redistribute it and/or modify it under
9
the terms of the GNU General Public License as published by the Free
10
Software Foundation; either version 3, or (at your option) any later
11
version.
12
 
13
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14
WARRANTY; without even the implied warranty of MERCHANTABILITY or
15
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16
for more details.
17
 
18
You should have received a copy of the GNU General Public License
19
along with GCC; see the file COPYING3.  If not see
20
<http://www.gnu.org/licenses/>.  */
21
 
22
#include "config.h"
23
#include "system.h"
24
#include "coretypes.h"
25
#include "target.h"
26
#include "diagnostic-core.h"
27
#include "output.h"
28
#include "tm.h"
29
#include "tree.h"
30
 
31
/* Like default_named_section_asm_out_constructor, except that even
32
   constructors with DEFAULT_INIT_PRIORITY must go in a numbered
33
   section on VxWorks.  The VxWorks runtime uses a clever trick to get
34
   the sentinel entry (-1) inserted at the beginning of the .ctors
35
   segment.  This trick will not work if we ever generate any entries
36
   in plain .ctors sections; we must always use .ctors.PRIORITY.  */
37
 
38
void
39
vxworks_asm_out_constructor (rtx symbol, int priority)
40
{
41
  section *sec;
42
 
43
  sec = get_cdtor_priority_section (priority,
44
                                    /*constructor_p=*/true);
45
  assemble_addr_to_section (symbol, sec);
46
}
47
 
48
/* See comment for vxworks_asm_out_constructor.  */
49
 
50
void
51
vxworks_asm_out_destructor (rtx symbol, int priority)
52
{
53
  section *sec;
54
 
55
  sec = get_cdtor_priority_section (priority,
56
                                    /*constructor_p=*/false);
57
  assemble_addr_to_section (symbol, sec);
58
}
59
 
60
/* Return the list of FIELD_DECLs that make up an emulated TLS
61
   variable's control object.  TYPE is the structure these are fields
62
   of and *NAME will be filled in with the structure tag that should
63
   be used.  */
64
 
65
static tree
66
vxworks_emutls_var_fields (tree type, tree *name)
67
{
68
  tree field, next_field;
69
 
70
  *name = get_identifier ("__tls_var");
71
 
72
  field = build_decl (BUILTINS_LOCATION, FIELD_DECL,
73
                      get_identifier ("size"), unsigned_type_node);
74
  DECL_CONTEXT (field) = type;
75
  next_field = field;
76
 
77
  field = build_decl (BUILTINS_LOCATION, FIELD_DECL,
78
                      get_identifier ("module_id"), unsigned_type_node);
79
  DECL_CONTEXT (field) = type;
80
  DECL_CHAIN (field) = next_field;
81
  next_field = field;
82
 
83
  field = build_decl (BUILTINS_LOCATION, FIELD_DECL,
84
                      get_identifier ("offset"), unsigned_type_node);
85
  DECL_CONTEXT (field) = type;
86
  DECL_CHAIN (field) = next_field;
87
 
88
  return field;
89
}
90
 
91
/* Return the CONSTRUCTOR to initialize an emulated TLS control
92
   object.  VAR is the control object.  DECL is the TLS object itself
93
   and TMPL_ADDR is the address (an ADDR_EXPR) of the initializer for
94
   that object.  */
95
 
96
static tree
97
vxworks_emutls_var_init (tree var, tree decl, tree tmpl_addr)
98
{
99
  VEC(constructor_elt,gc) *v = VEC_alloc (constructor_elt, gc, 3);
100
  constructor_elt *elt;
101
 
102
  tree type = TREE_TYPE (var);
103
  tree field = TYPE_FIELDS (type);
104
 
105
  elt = VEC_quick_push (constructor_elt, v, NULL);
106
  elt->index = field;
107
  elt->value = fold_convert (TREE_TYPE (field), tmpl_addr);
108
 
109
  elt = VEC_quick_push (constructor_elt, v, NULL);
110
  field = DECL_CHAIN (field);
111
  elt->index = field;
112
  elt->value = build_int_cst (TREE_TYPE (field), 0);
113
 
114
  elt = VEC_quick_push (constructor_elt, v, NULL);
115
  field = DECL_CHAIN (field);
116
  elt->index = field;
117
  elt->value = fold_convert (TREE_TYPE (field), DECL_SIZE_UNIT (decl));
118
 
119
  return build_constructor (type, v);
120
}
121
 
122
/* Do VxWorks-specific parts of TARGET_OPTION_OVERRIDE.  */
123
 
124
void
125
vxworks_override_options (void)
126
{
127
  /* We don't support __thread via target hooks.  */
128
  targetm.have_tls = false;
129
 
130
  targetm.emutls.get_address = "__builtin___tls_lookup";
131
  targetm.emutls.register_common = NULL;
132
  targetm.emutls.var_section = ".tls_vars";
133
  targetm.emutls.tmpl_section = ".tls_data";
134
  targetm.emutls.var_prefix = "__tls__";
135
  targetm.emutls.tmpl_prefix = "";
136
  targetm.emutls.var_fields = vxworks_emutls_var_fields;
137
  targetm.emutls.var_init = vxworks_emutls_var_init;
138
  targetm.emutls.var_align_fixed = true;
139
  targetm.emutls.debug_form_tls_address = true;
140
 
141
  /* We can use .ctors/.dtors sections only in RTP mode.  */
142
  targetm.have_ctors_dtors = TARGET_VXWORKS_RTP;
143
 
144
  /* PIC is only supported for RTPs.  */
145
  if (flag_pic && !TARGET_VXWORKS_RTP)
146
    error ("PIC is only supported for RTPs");
147
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.