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/* Definitions of target machine GNU compiler. 32bit VMS version.
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
Contributed by Douglas B Rupp (rupp@gnat.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 "tree.h"
#include "vms-protos.h"
#include "tm.h"
#include "ggc.h"
/* Correlation of standard CRTL names with DECCRTL function names. */
/* Name is for a function that allocate memory. Use the 64bit version
if -mmalloc64. */
#define VMS_CRTL_MALLOC (1 << 0)
/* If long pointer are enabled, use _NAME64 instead. */
#define VMS_CRTL_64 (1 << 1)
/* Use tNAME instead. To be applied after the previous rule. */
#define VMS_CRTL_FLOAT (1 << 2)
/* Prepend __bsd44__ before the name. To be applied after the P64
rule. */
#define VMS_CRTL_BSD44 (1 << 3)
/* Prepend x before the name for printf like functions. */
#define VMS_CRTL_PRNTF (1 << 4)
struct vms_crtl_name
{
/* The standard C name. */
const char *const name;
/* Flags to drive the translation. */
unsigned int flags;
};
/* Map for the translation. */
static const struct vms_crtl_name vms_crtl_names[] =
{
#include "vms-crtlmap.h"
};
/* Number of entires in the above array. */
#define NBR_CRTL_NAMES (sizeof (vms_crtl_names) / sizeof (*vms_crtl_names))
/* List of aliased identifiers. They must be persistant accross gc. */
static GTY(()) VEC(tree,gc) *aliases_id;
/* Add a CRTL translation. This simply use the transparent alias
mechanism, which is platform independant and works with the
#pragma extern_prefix (which set the assembler name). */
static void
vms_add_crtl_xlat (const char *name, size_t nlen,
const char *id_str, size_t id_len)
{
tree targ;
targ = get_identifier_with_length (name, nlen);
gcc_assert (!IDENTIFIER_TRANSPARENT_ALIAS (targ));
IDENTIFIER_TRANSPARENT_ALIAS (targ) = 1;
TREE_CHAIN (targ) = get_identifier_with_length (id_str, id_len);
VEC_safe_push (tree, gc, aliases_id, targ);
/* printf ("vms: %s (%p) -> %.*s\n", name, targ, id_len, id_str); */
}
/* Do VMS specific stuff on builtins: disable the ones that are not
standard, mangle names. */
void
vms_patch_builtins (void)
{
/* enum built_in_function bi; */
unsigned int i;
/* Fwrite on VMS is non-standard. */
if (builtin_decl_implicit_p (BUILT_IN_WRITE))
set_builtin_decl_implicit_p (BUILT_IN_WRITE, false);
if (builtin_decl_implicit_p (BUILT_IN_WRITE_UNLOCKED))
set_builtin_decl_implicit_p (BUILT_IN_WRITE_UNLOCKED, false);
/* Define aliases for names. */
for (i = 0; i < NBR_CRTL_NAMES; i++)
{
const struct vms_crtl_name *n = &vms_crtl_names[i];
char res[VMS_CRTL_MAXLEN + 3 + 9 + 1 + 1];
int rlen;
int nlen;
/* Add the dec-c prefix. */
memcpy (res, "decc$", 5);
rlen = 5;
if (n->flags & VMS_CRTL_BSD44)
{
memcpy (res + rlen, "__bsd44__", 9);
rlen += 9;
}
if (n->flags & VMS_CRTL_FLOAT)
res[rlen++] = 't';
if (n->flags & VMS_CRTL_PRNTF)
res[rlen++] = 'x';
nlen = strlen (n->name);
memcpy (res + rlen, n->name, nlen);
if ((n->flags & VMS_CRTL_64) == 0)
vms_add_crtl_xlat (n->name, nlen, res, rlen + nlen);
else
{
char alt[VMS_CRTL_MAXLEN + 3];
bool use_64;
/* Add three translations:
_X32 -> X
_X64 -> _X64
X -> X if short, _X64 if long. */
alt[0] = '_';
memcpy (alt + 1, n->name, nlen);
alt[1 + nlen + 0] = '3';
alt[1 + nlen + 1] = '2';
alt[1 + nlen + 2] = 0;
vms_add_crtl_xlat (alt, nlen + 3, res, rlen + nlen);
use_64 = (((n->flags & VMS_CRTL_64) && POINTER_SIZE == 64)
|| ((n->flags & VMS_CRTL_MALLOC)
&& TARGET_MALLOC64));
if (!use_64)
vms_add_crtl_xlat (n->name, nlen, res, rlen + nlen);
res[rlen++] = '_';
memcpy (res + rlen, n->name, nlen);
res[rlen + nlen + 0] = '6';
res[rlen + nlen + 1] = '4';
if (use_64)
vms_add_crtl_xlat (n->name, nlen, res, rlen + nlen + 2);
alt[1 + nlen + 0] = '6';
alt[1 + nlen + 1] = '4';
vms_add_crtl_xlat (alt, nlen + 3, res, rlen + nlen + 2);
}
}
}
#include "gt-vms.h"
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