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/* Subroutines for insn-output.c for NetWare.
Contributed by Jan Beulich (jbeulich@novell.com)
Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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 "regs.h"
#include "hard-reg-set.h"
#include "output.h"
#include "tree.h"
#include "flags.h"
#include "tm_p.h"
#include "toplev.h"
#include "ggc.h"
/* Return string which is the former assembler name modified with an
underscore prefix and a suffix consisting of an atsign (@) followed
by the number of bytes of arguments */
static tree
gen_stdcall_or_fastcall_decoration (tree decl, char prefix)
{
unsigned total = 0;
/* ??? This probably should use XSTR (XEXP (DECL_RTL (decl), 0), 0) instead
of DECL_ASSEMBLER_NAME. */
const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
char *newsym;
tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
if (formal_type != NULL_TREE)
{
/* These attributes are ignored for variadic functions in
i386.c:ix86_return_pops_args. For compatibility with MS
compiler do not add @0 suffix here. */
if (TREE_VALUE (tree_last (formal_type)) != void_type_node)
return NULL_TREE;
/* Quit if we hit an incomplete type. Error is reported
by convert_arguments in c-typeck.c or cp/typeck.c. */
while (TREE_VALUE (formal_type) != void_type_node
&& COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
{
unsigned parm_size
= TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
/* Must round up to include padding. This is done the same
way as in store_one_arg. */
parm_size = ((parm_size + PARM_BOUNDARY - 1)
/ PARM_BOUNDARY * PARM_BOUNDARY);
total += parm_size;
formal_type = TREE_CHAIN (formal_type);
}
}
newsym = alloca (1 + strlen (asmname) + 1 + 10 + 1);
return get_identifier_with_length (newsym,
sprintf (newsym,
"%c%s@%u",
prefix,
asmname,
total / BITS_PER_UNIT));
}
/* Return string which is the former assembler name modified with an
_n@ prefix where n represents the number of arguments passed in
registers */
static tree
gen_regparm_prefix (tree decl, unsigned nregs)
{
unsigned total = 0;
/* ??? This probably should use XSTR (XEXP (DECL_RTL (decl), 0), 0) instead
of DECL_ASSEMBLER_NAME. */
const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
char *newsym;
tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
if (formal_type != NULL_TREE)
{
/* This attribute is ignored for variadic functions. */
if (TREE_VALUE (tree_last (formal_type)) != void_type_node)
return NULL_TREE;
/* Quit if we hit an incomplete type. Error is reported
by convert_arguments in c-typeck.c or cp/typeck.c. */
while (TREE_VALUE (formal_type) != void_type_node
&& COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
{
unsigned parm_size
= TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
/* Must round up to include padding. This is done the same
way as in store_one_arg. */
parm_size = ((parm_size + PARM_BOUNDARY - 1)
/ PARM_BOUNDARY * PARM_BOUNDARY);
total += parm_size;
formal_type = TREE_CHAIN (formal_type);
}
}
if (nregs > total / BITS_PER_WORD)
nregs = total / BITS_PER_WORD;
gcc_assert (nregs <= 9);
newsym = alloca (3 + strlen (asmname) + 1);
return get_identifier_with_length (newsym,
sprintf (newsym,
"_%u@%s",
nregs,
asmname));
}
void
i386_nlm_encode_section_info (tree decl, rtx rtl, int first)
{
default_encode_section_info (decl, rtl, first);
if (first
&& TREE_CODE (decl) == FUNCTION_DECL
&& *IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)) != '*'
&& !strchr (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), '@'))
{
tree type_attributes = TYPE_ATTRIBUTES (TREE_TYPE (decl));
tree newid;
if (lookup_attribute ("stdcall", type_attributes))
newid = gen_stdcall_or_fastcall_decoration (decl, '_');
else if (lookup_attribute ("fastcall", type_attributes))
newid = gen_stdcall_or_fastcall_decoration (decl, FASTCALL_PREFIX);
else if ((newid = lookup_attribute ("regparm", type_attributes)) != NULL_TREE)
newid = gen_regparm_prefix (decl,
TREE_INT_CST_LOW (TREE_VALUE (TREE_VALUE (newid))));
if (newid != NULL_TREE)
{
rtx rtlname = XEXP (rtl, 0);
if (GET_CODE (rtlname) == MEM)
rtlname = XEXP (rtlname, 0);
XSTR (rtlname, 0) = IDENTIFIER_POINTER (newid);
/* These attributes must be present on first declaration,
change_decl_assembler_name will warn if they are added
later and the decl has been referenced, but duplicate_decls
should catch the mismatch before this is called. */
change_decl_assembler_name (decl, newid);
}
}
}
/* Strip the stdcall/fastcall/regparm pre-/suffix. */
const char *
i386_nlm_strip_name_encoding (const char *str)
{
const char *name = default_strip_name_encoding (str);
if (*str != '*' && (*name == '_' || *name == '@'))
{
const char *p = strchr (name + 1, '@');
if (p)
{
++name;
if (ISDIGIT (p[1]))
name = ggc_alloc_string (name, p - name);
else
{
gcc_assert (ISDIGIT (*name));
name++;
gcc_assert (name == p);
}
}
}
return name;
}
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