258 lines
7.2 KiB
C
258 lines
7.2 KiB
C
|
/* Routines for GCC for ARM/pe.
|
|||
|
Copyright (C) 1995, 1996, 2000, 2001, 2002, 2004, 2005, 2007, 2008
|
|||
|
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 3, 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 COPYING3. If not see
|
|||
|
<http://www.gnu.org/licenses/>. */
|
|||
|
|
|||
|
#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 (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 (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 (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 (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 (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 = XALLOCAVEC (char, 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 (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 = XALLOCAVEC (char, 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 (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 (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 = XALLOCAVEC (char, len + 1);
|
|||
|
sprintf (string, "%s%s", prefix, name);
|
|||
|
|
|||
|
DECL_SECTION_NAME (decl) = build_string (len, string);
|
|||
|
}
|