270 lines
7.3 KiB
C
270 lines
7.3 KiB
C
/* Routines for GCC for ARM/pe.
|
||
Copyright (C) 1995, 1996, 2000, 2001, 2002, 2004, 2005
|
||
Free Software Foundation, Inc.
|
||
Contributed by Doug Evans (dje@cygnus.com).
|
||
|
||
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 2, 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 COPYING. If not, write to
|
||
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, USA. */
|
||
|
||
#include "config.h"
|
||
#include "system.h"
|
||
#include "coretypes.h"
|
||
#include "tm.h"
|
||
#include "rtl.h"
|
||
#include "output.h"
|
||
#include "flags.h"
|
||
#include "tree.h"
|
||
#include "expr.h"
|
||
#include "toplev.h"
|
||
#include "tm_p.h"
|
||
|
||
extern int current_function_anonymous_args;
|
||
|
||
|
||
/* Return nonzero if DECL is a dllexport'd object. */
|
||
|
||
tree current_class_type; /* FIXME */
|
||
|
||
int
|
||
arm_dllexport_p (decl)
|
||
tree decl;
|
||
{
|
||
tree exp;
|
||
|
||
if (TREE_CODE (decl) != VAR_DECL
|
||
&& TREE_CODE (decl) != FUNCTION_DECL)
|
||
return 0;
|
||
exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl));
|
||
if (exp)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return nonzero if DECL is a dllimport'd object. */
|
||
|
||
int
|
||
arm_dllimport_p (decl)
|
||
tree decl;
|
||
{
|
||
tree imp;
|
||
|
||
if (TREE_CODE (decl) == FUNCTION_DECL
|
||
&& TARGET_NOP_FUN_DLLIMPORT)
|
||
return 0;
|
||
|
||
if (TREE_CODE (decl) != VAR_DECL
|
||
&& TREE_CODE (decl) != FUNCTION_DECL)
|
||
return 0;
|
||
imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl));
|
||
if (imp)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return nonzero if SYMBOL is marked as being dllexport'd. */
|
||
|
||
int
|
||
arm_dllexport_name_p (symbol)
|
||
const char * symbol;
|
||
{
|
||
return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'e' && symbol[2] == '.';
|
||
}
|
||
|
||
/* Return nonzero if SYMBOL is marked as being dllimport'd. */
|
||
|
||
int
|
||
arm_dllimport_name_p (symbol)
|
||
const char * symbol;
|
||
{
|
||
return symbol[0] == ARM_PE_FLAG_CHAR && symbol[1] == 'i' && symbol[2] == '.';
|
||
}
|
||
|
||
/* Mark a DECL as being dllexport'd.
|
||
Note that we override the previous setting (e.g.: dllimport). */
|
||
|
||
void
|
||
arm_mark_dllexport (decl)
|
||
tree decl;
|
||
{
|
||
const char * oldname;
|
||
char * newname;
|
||
rtx rtlname;
|
||
tree idp;
|
||
|
||
rtlname = XEXP (DECL_RTL (decl), 0);
|
||
if (GET_CODE (rtlname) == MEM)
|
||
rtlname = XEXP (rtlname, 0);
|
||
gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
|
||
oldname = XSTR (rtlname, 0);
|
||
|
||
if (arm_dllimport_name_p (oldname))
|
||
oldname += 9;
|
||
else if (arm_dllexport_name_p (oldname))
|
||
return; /* already done */
|
||
|
||
newname = alloca (strlen (oldname) + 4);
|
||
sprintf (newname, "%ce.%s", ARM_PE_FLAG_CHAR, oldname);
|
||
|
||
/* We pass newname through get_identifier to ensure it has a unique
|
||
address. RTL processing can sometimes peek inside the symbol ref
|
||
and compare the string's addresses to see if two symbols are
|
||
identical. */
|
||
/* ??? At least I think that's why we do this. */
|
||
idp = get_identifier (newname);
|
||
|
||
XEXP (DECL_RTL (decl), 0) =
|
||
gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
|
||
}
|
||
|
||
/* Mark a DECL as being dllimport'd. */
|
||
|
||
void
|
||
arm_mark_dllimport (decl)
|
||
tree decl;
|
||
{
|
||
const char * oldname;
|
||
char * newname;
|
||
tree idp;
|
||
rtx rtlname, newrtl;
|
||
|
||
rtlname = XEXP (DECL_RTL (decl), 0);
|
||
|
||
if (GET_CODE (rtlname) == MEM)
|
||
rtlname = XEXP (rtlname, 0);
|
||
gcc_assert (GET_CODE (rtlname) == SYMBOL_REF);
|
||
oldname = XSTR (rtlname, 0);
|
||
|
||
gcc_assert (!arm_dllexport_name_p (oldname));
|
||
if (arm_dllimport_name_p (oldname))
|
||
return; /* already done */
|
||
|
||
/* ??? One can well ask why we're making these checks here,
|
||
and that would be a good question. */
|
||
|
||
/* Imported variables can't be initialized. */
|
||
if (TREE_CODE (decl) == VAR_DECL
|
||
&& !DECL_VIRTUAL_P (decl)
|
||
&& DECL_INITIAL (decl))
|
||
{
|
||
error ("initialized variable %q+D is marked dllimport", decl);
|
||
return;
|
||
}
|
||
/* Nor can they be static. */
|
||
if (TREE_CODE (decl) == VAR_DECL
|
||
/* ??? Is this test for vtables needed? */
|
||
&& !DECL_VIRTUAL_P (decl)
|
||
&& 0 /*???*/)
|
||
{
|
||
error ("static variable %q+D is marked dllimport", decl);
|
||
return;
|
||
}
|
||
|
||
/* `extern' needn't be specified with dllimport.
|
||
Specify `extern' now and hope for the best. Sigh. */
|
||
if (TREE_CODE (decl) == VAR_DECL
|
||
/* ??? Is this test for vtables needed? */
|
||
&& !DECL_VIRTUAL_P (decl))
|
||
{
|
||
DECL_EXTERNAL (decl) = 1;
|
||
TREE_PUBLIC (decl) = 1;
|
||
}
|
||
|
||
newname = alloca (strlen (oldname) + 11);
|
||
sprintf (newname, "%ci.__imp_%s", ARM_PE_FLAG_CHAR, oldname);
|
||
|
||
/* We pass newname through get_identifier to ensure it has a unique
|
||
address. RTL processing can sometimes peek inside the symbol ref
|
||
and compare the string's addresses to see if two symbols are
|
||
identical. */
|
||
/* ??? At least I think that's why we do this. */
|
||
idp = get_identifier (newname);
|
||
|
||
newrtl = gen_rtx_MEM (Pmode,
|
||
gen_rtx_SYMBOL_REF (Pmode,
|
||
IDENTIFIER_POINTER (idp)));
|
||
XEXP (DECL_RTL (decl), 0) = newrtl;
|
||
}
|
||
|
||
void
|
||
arm_pe_encode_section_info (decl, rtl, first)
|
||
tree decl;
|
||
rtx rtl;
|
||
int first ATTRIBUTE_UNUSED;
|
||
{
|
||
/* This bit is copied from arm_encode_section_info. */
|
||
if (optimize > 0 && TREE_CONSTANT (decl))
|
||
SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;
|
||
|
||
/* Mark the decl so we can tell from the rtl whether the object is
|
||
dllexport'd or dllimport'd. */
|
||
if (arm_dllexport_p (decl))
|
||
arm_mark_dllexport (decl);
|
||
else if (arm_dllimport_p (decl))
|
||
arm_mark_dllimport (decl);
|
||
/* It might be that DECL has already been marked as dllimport, but a
|
||
subsequent definition nullified that. The attribute is gone but
|
||
DECL_RTL still has @i.__imp_foo. We need to remove that. */
|
||
else if ((TREE_CODE (decl) == FUNCTION_DECL
|
||
|| TREE_CODE (decl) == VAR_DECL)
|
||
&& DECL_RTL (decl) != NULL_RTX
|
||
&& GET_CODE (DECL_RTL (decl)) == MEM
|
||
&& GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM
|
||
&& GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 0)) == SYMBOL_REF
|
||
&& arm_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0)))
|
||
{
|
||
const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0);
|
||
tree idp = get_identifier (oldname + 9);
|
||
rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
|
||
|
||
XEXP (DECL_RTL (decl), 0) = newrtl;
|
||
|
||
/* We previously set TREE_PUBLIC and DECL_EXTERNAL.
|
||
??? We leave these alone for now. */
|
||
}
|
||
}
|
||
|
||
void
|
||
arm_pe_unique_section (decl, reloc)
|
||
tree decl;
|
||
int reloc;
|
||
{
|
||
int len;
|
||
const char * name;
|
||
char * string;
|
||
const char * prefix;
|
||
|
||
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
||
name = arm_strip_name_encoding (name);
|
||
|
||
/* The object is put in, for example, section .text$foo.
|
||
The linker will then ultimately place them in .text
|
||
(everything from the $ on is stripped). */
|
||
if (TREE_CODE (decl) == FUNCTION_DECL)
|
||
prefix = ".text$";
|
||
else if (decl_readonly_section (decl, reloc))
|
||
prefix = ".rdata$";
|
||
else
|
||
prefix = ".data$";
|
||
len = strlen (name) + strlen (prefix);
|
||
string = alloca (len + 1);
|
||
sprintf (string, "%s%s", prefix, name);
|
||
|
||
DECL_SECTION_NAME (decl) = build_string (len, string);
|
||
}
|