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

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1 282 jeremybenn
/* Routines for GCC for ARM/pe.
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   Copyright (C) 1995, 1996, 2000, 2001, 2002, 2004, 2005, 2007, 2008
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   Free Software Foundation, Inc.
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   Contributed by Doug Evans (dje@cygnus.com).
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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 it
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   under the terms of the GNU General Public License as published
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   by the Free Software Foundation; either version 3, or (at your
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   option) any later version.
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   GCC is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
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   License for more details.
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   You should have received a copy of the GNU General Public License
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   along with GCC; see the file COPYING3.  If not see
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   <http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "rtl.h"
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#include "output.h"
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#include "flags.h"
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#include "tree.h"
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#include "expr.h"
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#include "toplev.h"
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#include "tm_p.h"
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extern int current_function_anonymous_args;
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/* Return nonzero if DECL is a dllexport'd object.  */
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tree current_class_type; /* FIXME */
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int
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arm_dllexport_p (tree decl)
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{
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  tree exp;
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  if (TREE_CODE (decl) != VAR_DECL
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      && TREE_CODE (decl) != FUNCTION_DECL)
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    return 0;
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  exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl));
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  if (exp)
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    return 1;
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  return 0;
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}
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/* Return nonzero if DECL is a dllimport'd object.  */
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int
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arm_dllimport_p (tree decl)
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{
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  tree imp;
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  if (TREE_CODE (decl) == FUNCTION_DECL
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      && TARGET_NOP_FUN_DLLIMPORT)
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    return 0;
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  if (TREE_CODE (decl) != VAR_DECL
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      && TREE_CODE (decl) != FUNCTION_DECL)
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    return 0;
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  imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl));
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  if (imp)
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    return 1;
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  return 0;
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}
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/* Return nonzero if SYMBOL is marked as being dllexport'd.  */
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int
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arm_dllexport_name_p (const char *symbol)
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{
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  return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'e' && symbol[2] == '.';
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}
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/* Return nonzero if SYMBOL is marked as being dllimport'd.  */
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int
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arm_dllimport_name_p (const char *symbol)
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{
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  return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'i' && symbol[2] == '.';
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}
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/* Mark a DECL as being dllexport'd.
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   Note that we override the previous setting (e.g.: dllimport).  */
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void
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arm_mark_dllexport (tree decl)
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{
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  const char * oldname;
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  char * newname;
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  rtx rtlname;
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  tree idp;
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  rtlname = XEXP (DECL_RTL (decl), 0);
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  if (GET_CODE (rtlname) == MEM)
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    rtlname = XEXP (rtlname, 0);
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  gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
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  oldname = XSTR (rtlname, 0);
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  if (arm_dllimport_name_p (oldname))
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    oldname += 9;
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  else if (arm_dllexport_name_p (oldname))
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    return; /* already done */
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  newname = XALLOCAVEC (char, strlen (oldname) + 4);
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  sprintf (newname, "%ce.%s", ARM_PE_FLAG_CHAR, oldname);
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  /* We pass newname through get_identifier to ensure it has a unique
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     address.  RTL processing can sometimes peek inside the symbol ref
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     and compare the string's addresses to see if two symbols are
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     identical.  */
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  /* ??? At least I think that's why we do this.  */
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  idp = get_identifier (newname);
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  XEXP (DECL_RTL (decl), 0) =
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    gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
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}
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/* Mark a DECL as being dllimport'd.  */
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void
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arm_mark_dllimport (tree decl)
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{
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  const char * oldname;
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  char * newname;
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  tree idp;
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  rtx rtlname, newrtl;
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  rtlname = XEXP (DECL_RTL (decl), 0);
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  if (GET_CODE (rtlname) == MEM)
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    rtlname = XEXP (rtlname, 0);
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  gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
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  oldname = XSTR (rtlname, 0);
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  gcc_assert (!arm_dllexport_name_p (oldname));
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  if (arm_dllimport_name_p (oldname))
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    return; /* already done */
149
 
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  /* ??? One can well ask why we're making these checks here,
151
     and that would be a good question.  */
152
 
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  /* Imported variables can't be initialized.  */
154
  if (TREE_CODE (decl) == VAR_DECL
155
      && !DECL_VIRTUAL_P (decl)
156
      && DECL_INITIAL (decl))
157
    {
158
      error ("initialized variable %q+D is marked dllimport", decl);
159
      return;
160
    }
161
  /* Nor can they be static.  */
162
  if (TREE_CODE (decl) == VAR_DECL
163
      /* ??? Is this test for vtables needed?  */
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      && !DECL_VIRTUAL_P (decl)
165
      && 0 /*???*/)
166
    {
167
      error ("static variable %q+D is marked dllimport", decl);
168
      return;
169
    }
170
 
171
  /* `extern' needn't be specified with dllimport.
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     Specify `extern' now and hope for the best.  Sigh.  */
173
  if (TREE_CODE (decl) == VAR_DECL
174
      /* ??? Is this test for vtables needed?  */
175
      && !DECL_VIRTUAL_P (decl))
176
    {
177
      DECL_EXTERNAL (decl) = 1;
178
      TREE_PUBLIC (decl) = 1;
179
    }
180
 
181
  newname = XALLOCAVEC (char, strlen (oldname) + 11);
182
  sprintf (newname, "%ci.__imp_%s", ARM_PE_FLAG_CHAR, oldname);
183
 
184
  /* We pass newname through get_identifier to ensure it has a unique
185
     address.  RTL processing can sometimes peek inside the symbol ref
186
     and compare the string's addresses to see if two symbols are
187
     identical.  */
188
  /* ??? At least I think that's why we do this.  */
189
  idp = get_identifier (newname);
190
 
191
  newrtl = gen_rtx_MEM (Pmode,
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                        gen_rtx_SYMBOL_REF (Pmode,
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                                            IDENTIFIER_POINTER (idp)));
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  XEXP (DECL_RTL (decl), 0) = newrtl;
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}
196
 
197
void
198
arm_pe_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED)
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{
200
  /* This bit is copied from arm_encode_section_info.  */
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  if (optimize > 0 && TREE_CONSTANT (decl))
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    SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;
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204
  /* Mark the decl so we can tell from the rtl whether the object is
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     dllexport'd or dllimport'd.  */
206
  if (arm_dllexport_p (decl))
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    arm_mark_dllexport (decl);
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  else if (arm_dllimport_p (decl))
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    arm_mark_dllimport (decl);
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  /* It might be that DECL has already been marked as dllimport, but a
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     subsequent definition nullified that.  The attribute is gone but
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     DECL_RTL still has @i.__imp_foo.  We need to remove that.  */
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  else if ((TREE_CODE (decl) == FUNCTION_DECL
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            || TREE_CODE (decl) == VAR_DECL)
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           && DECL_RTL (decl) != NULL_RTX
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           && GET_CODE (DECL_RTL (decl)) == MEM
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           && GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM
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           && GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 0)) == SYMBOL_REF
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           && arm_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0)))
220
    {
221
      const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0);
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      tree idp = get_identifier (oldname + 9);
223
      rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
224
 
225
      XEXP (DECL_RTL (decl), 0) = newrtl;
226
 
227
      /* We previously set TREE_PUBLIC and DECL_EXTERNAL.
228
         ??? We leave these alone for now.  */
229
    }
230
}
231
 
232
void
233
arm_pe_unique_section (tree decl, int reloc)
234
{
235
  int len;
236
  const char * name;
237
  char * string;
238
  const char * prefix;
239
 
240
  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
241
  name = arm_strip_name_encoding (name);
242
 
243
  /* The object is put in, for example, section .text$foo.
244
     The linker will then ultimately place them in .text
245
     (everything from the $ on is stripped).  */
246
  if (TREE_CODE (decl) == FUNCTION_DECL)
247
    prefix = ".text$";
248
  else if (decl_readonly_section (decl, reloc))
249
    prefix = ".rdata$";
250
  else
251
    prefix = ".data$";
252
  len = strlen (name) + strlen (prefix);
253
  string = XALLOCAVEC (char, len + 1);
254
  sprintf (string, "%s%s", prefix, name);
255
 
256
  DECL_SECTION_NAME (decl) = build_string (len, string);
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}

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