i386-interix.h

来自「gcc3.2.1源代码」· C头文件 代码 · 共 434 行 · 第 1/2 页

/* Target definitions for GNU compiler for Intel 80386 running Interix
   Parts Copyright (C) 1991, 1999, 2000 Free Software Foundation, Inc.

   Parts:
     by Douglas B. Rupp ([e-mail]).
     by Ron Guilmette ([e-mail]).
     by Donn Terry ([e-mail]).
     by Mumit Khan ([e-mail]).

This file is part of GNU CC.

GNU CC 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.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#define YES_UNDERSCORES

/* YES_UNDERSCORES must precede gas.h */
#include <i386/gas.h>
/* The rest must follow.  */

#define DBX_DEBUGGING_INFO
#define SDB_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

#define HANDLE_SYSV_PRAGMA
#undef HANDLE_PRAGMA_WEAK  /* until the link format can handle it */

/* By default, target has a 80387, uses IEEE compatible arithmetic,
   and returns float values in the 387 and needs stack probes
   We also align doubles to 64-bits for MSVC default compatibility */
#undef TARGET_SUBTARGET_DEFAULT
#define TARGET_SUBTARGET_DEFAULT \
   (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \
    MASK_ALIGN_DOUBLE)

#undef TARGET_CPU_DEFAULT
#define TARGET_CPU_DEFAULT 2 /* 486 */

#define WCHAR_UNSIGNED 1
#define WCHAR_TYPE_SIZE 16
#define WCHAR_TYPE "short unsigned int"

/* WinNT (and thus Interix) use unsigned int */
#define SIZE_TYPE "unsigned int"

#define ASM_LOAD_ADDR(loc, reg)   "     leal " #loc "," #reg "\n"

/* cpp handles __STDC__ */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES " \
  -D__INTERIX \
  -D__OPENNT \
  -D_M_IX86=300 -D_X86_=1 \
  -D__stdcall=__attribute__((__stdcall__)) \
  -D__cdecl=__attribute__((__cdecl__)) \
  -D__declspec(x)=__attribute__((x)) \
  -Asystem=unix -Asystem=interix"

#undef CPP_SPEC
/* Write out the correct language type definition for the header files.  
   Unless we have assembler language, write out the symbols for C.
   cpp_cpu is an Intel specific variant. See i386.h
   mieee is an Alpha specific variant.  Cross polination a bad idea.
   */
#define CPP_SPEC "\
%{!.S:	-D__LANGUAGE_C__ -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
%{.S:	-D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
%{.cc:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
%{.cxx:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
%{.C:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
%{.m:	-D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C} \
-remap \
%(cpp_cpu) \
%{posix:-D_POSIX_SOURCE} \
-isystem %$INTERIX_ROOT/usr/include"

#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 Interix)");

/* The global __fltused is necessary to cause the printf/scanf routines
   for outputting/inputting floating point numbers to be loaded.  Since this
   is kind of hard to detect, we just do it all the time.  */

#ifdef ASM_FILE_START
#undef ASM_FILE_START
#endif
#define ASM_FILE_START(FILE) \
  do {  fprintf (FILE, "\t.file\t");                            \
        output_quoted_string (FILE, dump_base_name);            \
        fprintf (FILE, "\n");                                   \
        fprintf (FILE, ".global\t__fltused\n");                 \
  } while (0)

/* A table of bytes codes used by the ASM_OUTPUT_ASCII and
   ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
   corresponds to a particular byte value [0..255].  For any
   given byte value, if the value in the corresponding table
   position is zero, the given character can be output directly.
   If the table value is 1, the byte must be output as a \ooo
   octal escape.  If the tables value is anything else, then the
   byte value should be output as a \ followed by the value
   in the table.  Note that we can use standard UN*X escape
   sequences for many control characters, but we don't use
   \a to represent BEL because some svr4 assemblers (e.g. on
   the i386) don't know about that.  Also, we don't use \v
   since some versions of gas, such as 2.2 did not accept it.  */

#define ESCAPES \
"\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"

/* Some svr4 assemblers have a limit on the number of characters which
   can appear in the operand of a .string directive.  If your assembler
   has such a limitation, you should define STRING_LIMIT to reflect that
   limit.  Note that at least some svr4 assemblers have a limit on the
   actual number of bytes in the double-quoted string, and that they
   count each character in an escape sequence as one byte.  Thus, an
   escape sequence like \377 would count as four bytes.

   If your target assembler doesn't support the .string directive, you
   should define this to zero.
*/

#define STRING_LIMIT	((unsigned) 256)

#define STRING_ASM_OP	"\t.string\t"

/* The routine used to output NUL terminated strings.  We use a special
   version of this for most svr4 targets because doing so makes the
   generated assembly code more compact (and thus faster to assemble)
   as well as more readable, especially for targets like the i386
   (where the only alternative is to output character sequences as
   comma separated lists of numbers).   */

#define ASM_OUTPUT_LIMITED_STRING(FILE, STR)				\
  do									\
    {									\
      register const unsigned char *_limited_str =			\
        (const unsigned char *) (STR);					\
      register unsigned ch;						\
      fprintf ((FILE), "%s\"", STRING_ASM_OP);				\
      for (; (ch = *_limited_str); _limited_str++)			\
        {								\
	  register int escape = ESCAPES[ch];				\
	  switch (escape)						\
	    {								\
	    case 0:							\
	      putc (ch, (FILE));					\
	      break;							\
	    case 1:							\
	      fprintf ((FILE), "\\%03o", ch);				\
	      break;							\
	    default:							\
	      putc ('\\', (FILE));					\
	      putc (escape, (FILE));					\
	      break;							\
	    }								\
        }								\
      fprintf ((FILE), "\"\n");						\
    }									\
  while (0)

/* The routine used to output sequences of byte values.  We use a special
   version of this for most svr4 targets because doing so makes the
   generated assembly code more compact (and thus faster to assemble)
   as well as more readable.  Note that if we find subparts of the
   character sequence which end with NUL (and which are shorter than
   STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */

#undef ASM_OUTPUT_ASCII
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)				\
  do									\
    {									\
      register const unsigned char *_ascii_bytes =			\
        (const unsigned char *) (STR);					\
      register const unsigned char *limit = _ascii_bytes + (LENGTH);	\
      register unsigned bytes_in_chunk = 0;				\
      for (; _ascii_bytes < limit; _ascii_bytes++)			\
        {								\
	  register const unsigned char *p;				\
	  if (bytes_in_chunk >= 64)					\
	    {								\
	      fputc ('\n', (FILE));					\
	      bytes_in_chunk = 0;					\
	    }								\
	  for (p = _ascii_bytes; p < limit && *p != '\0'; p++)		\
	    continue;							\
	  if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT)	\
	    {								\
	      if (bytes_in_chunk > 0)					\
		{							\
		  fputc ('\n', (FILE));					\
		  bytes_in_chunk = 0;					\
		}							\
	      ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);		\
	      _ascii_bytes = p;						\
	    }								\
	  else								\
	    {								\