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/* Subroutines for insn-output.c for NetWare.
Contributed by Jan Beulich (jbeulich@novell.com)
Copyright (C) 2004, 2005, 2007, 2008 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 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 "regs.h"
#include "hard-reg-set.h"
#include "output.h"
#include "tree.h"
#include "flags.h"
#include "tm_p.h"
#include "toplev.h"
#include "langhooks.h"
#include "ggc.h"
/* Return string which is the function name, identified by ID, modified
with PREFIX and a suffix consisting of an atsign (@) followed by the
number of bytes of arguments. If ID is NULL use the DECL_NAME as base.
Return NULL if no change required. */
static tree
gen_stdcall_or_fastcall_decoration (tree decl, tree id, char prefix)
{
unsigned HOST_WIDE_INT total = 0;
const char *old_str = IDENTIFIER_POINTER (id != NULL_TREE ? id : DECL_NAME (decl));
char *new_str;
tree type = TREE_TYPE (decl);
if (prototype_p (type))
{
tree arg;
function_args_iterator args_iter;
/* This attribute is ignored for variadic functions. */
if (stdarg_p (type))
return NULL_TREE;
/* Quit if we hit an incomplete type. Error is reported
by convert_arguments in c-typeck.c or cp/typeck.c. */
FOREACH_FUNCTION_ARGS(type, arg, args_iter)
{
HOST_WIDE_INT parm_size;
unsigned HOST_WIDE_INT parm_boundary_bytes;
if (! COMPLETE_TYPE_P (arg))
break;
parm_size = int_size_in_bytes (arg);
if (parm_size < 0)
break;
parm_boundary_bytes = PARM_BOUNDARY / BITS_PER_UNIT;
/* Must round up to include padding. This is done the same
way as in store_one_arg. */
total += (parm_size + parm_boundary_bytes - 1)
/ parm_boundary_bytes * parm_boundary_bytes;
}
}
new_str = XALLOCAVEC (char, 1 + strlen (old_str) + 1 + 10 + 1);
sprintf (new_str, "%c%s@" HOST_WIDE_INT_PRINT_UNSIGNED,
prefix, old_str, total);
return get_identifier (new_str);
}
/* Return string which is the function name, identified by ID, modified
with an _n@ prefix (where n represents the number of arguments passed in
registers). If ID is NULL use the DECL_NAME as base.
Return NULL if no change required. */
static tree
gen_regparm_prefix (tree decl, tree id, unsigned int nregs)
{
unsigned HOST_WIDE_INT total = 0;
const char *old_str = IDENTIFIER_POINTER (id != NULL_TREE ? id : DECL_NAME (decl));
char *new_str;
tree type = TREE_TYPE (decl);
if (prototype_p (type))
{
tree arg;
function_args_iterator args_iter;
/* This attribute is ignored for variadic functions. */
if (stdarg_p (type))
return NULL_TREE;
/* Quit if we hit an incomplete type. Error is reported
by convert_arguments in c-typeck.c or cp/typeck.c. */
FOREACH_FUNCTION_ARGS(type, arg, args_iter)
{
HOST_WIDE_INT parm_size;
unsigned HOST_WIDE_INT parm_boundary_bytes;
if (! COMPLETE_TYPE_P (arg))
break;
parm_size = int_size_in_bytes (arg);
if (parm_size < 0)
break;
parm_boundary_bytes = PARM_BOUNDARY / BITS_PER_UNIT;
/* Must round up to include padding. This is done the same
way as in store_one_arg. */
total += (parm_size + parm_boundary_bytes - 1)
/ parm_boundary_bytes * parm_boundary_bytes;
}
}
if (nregs > total / UNITS_PER_WORD)
nregs = total / UNITS_PER_WORD;
gcc_assert (nregs <= 9);
new_str = XALLOCAVEC (char, 3 + strlen (old_str) + 1);
sprintf (new_str, "_%u@%s", nregs, old_str);
return get_identifier (new_str);
}
/* Maybe decorate and get a new identifier for the DECL of a stdcall or
fastcall function. The original identifier is supplied in ID. */
static tree
i386_nlm_maybe_mangle_decl_assembler_name (tree decl, tree id)
{
tree type_attributes = TYPE_ATTRIBUTES (TREE_TYPE (decl));
tree new_id;
if (lookup_attribute ("stdcall", type_attributes))
new_id = gen_stdcall_or_fastcall_decoration (decl, id, '_');
else if (lookup_attribute ("fastcall", type_attributes))
new_id = gen_stdcall_or_fastcall_decoration (decl, id, FASTCALL_PREFIX);
else if ((new_id = lookup_attribute ("regparm", type_attributes)))
new_id = gen_regparm_prefix (decl, id,
TREE_INT_CST_LOW (TREE_VALUE (TREE_VALUE (new_id))));
else
new_id = NULL_TREE;
return new_id;
}
/* This is used as a target hook to modify the DECL_ASSEMBLER_NAME
in the language-independent default hook
langhooks.c:lhd_set_decl_assembler_name ()
and in cp/mangle.c:mangle_decl (). */
tree
i386_nlm_mangle_decl_assembler_name (tree decl, tree id)
{
tree new_id = TREE_CODE (decl) == FUNCTION_DECL
? i386_nlm_maybe_mangle_decl_assembler_name (decl, id)
: NULL_TREE;
return (new_id ? new_id : id);
}
void
i386_nlm_encode_section_info (tree decl, rtx rtl, int first)
{
default_encode_section_info (decl, rtl, first);
if (TREE_CODE (decl) == FUNCTION_DECL
/* Do not change the identifier if a verbatim asmspec
or if stdcall suffix already added. */
&& *IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)) != '*'
&& !strchr (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), '@')
/* FIXME: Imported stdcall names are not modified by the Ada frontend.
Check and decorate the RTL name now. */
&& strcmp (lang_hooks.name, "GNU Ada") == 0)
{
rtx symbol = XEXP (rtl, 0);
tree new_id;
tree old_id = DECL_ASSEMBLER_NAME (decl);
gcc_assert (GET_CODE (symbol) == SYMBOL_REF);
if ((new_id = i386_nlm_maybe_mangle_decl_assembler_name (decl, old_id)))
XSTR (symbol, 0) = IDENTIFIER_POINTER (new_id);
}
}
/* 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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