424 lines
15 KiB
C
424 lines
15 KiB
C
/* Target definitions for GNU compiler for Intel 80386 running Interix
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Parts Copyright (C) 1991, 1999, 2000 Free Software Foundation, Inc.
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Parts:
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by Douglas B. Rupp (drupp@cs.washington.edu).
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by Ron Guilmette (rfg@netcom.com).
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by Donn Terry (donn@softway.com).
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by Mumit Khan (khan@xraylith.wisc.edu).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#define YES_UNDERSCORES
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/* YES_UNDERSCORES must precede gas.h */
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#include <i386/gas.h>
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/* The rest must follow. */
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#define DBX_DEBUGGING_INFO
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#define SDB_DEBUGGING_INFO
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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#define HANDLE_SYSV_PRAGMA
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#undef HANDLE_PRAGMA_WEAK /* until the link format can handle it */
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/* By default, target has a 80387, uses IEEE compatible arithmetic,
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and returns float values in the 387 and needs stack probes
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We also align doubles to 64-bits for MSVC default compatibility */
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#undef TARGET_SUBTARGET_DEFAULT
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#define TARGET_SUBTARGET_DEFAULT \
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(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \
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MASK_ALIGN_DOUBLE)
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#undef TARGET_CPU_DEFAULT
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#define TARGET_CPU_DEFAULT 2 /* 486 */
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#define WCHAR_UNSIGNED 1
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#define WCHAR_TYPE_SIZE 16
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#define WCHAR_TYPE "short unsigned int"
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/* WinNT (and thus Interix) use unsigned int */
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#define SIZE_TYPE "unsigned int"
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#define ASM_LOAD_ADDR(loc, reg) " leal " #loc "," #reg "\n"
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/* cpp handles __STDC__ */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES " \
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-D__INTERIX \
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-D__OPENNT \
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-D_M_IX86=300 -D_X86_=1 \
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-D__stdcall=__attribute__((__stdcall__)) \
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-D__cdecl=__attribute__((__cdecl__)) \
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-Asystem=unix -Asystem=interix"
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#undef CPP_SPEC
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/* Write out the correct language type definition for the header files.
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Unless we have assembler language, write out the symbols for C.
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cpp_cpu is an Intel specific variant. See i386.h
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mieee is an Alpha specific variant. Cross polination a bad idea.
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*/
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#define CPP_SPEC "\
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%{!.S: -D__LANGUAGE_C__ -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}} \
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%{.S: -D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
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%{.cc: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
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%{.cxx: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
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%{.C: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
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%{.m: -D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C} \
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-remap \
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%(cpp_cpu) \
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%{posix:-D_POSIX_SOURCE} \
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-isystem %$INTERIX_ROOT/usr/include"
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (i386 Interix)");
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/* The global __fltused is necessary to cause the printf/scanf routines
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for outputting/inputting floating point numbers to be loaded. Since this
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is kind of hard to detect, we just do it all the time. */
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#ifdef ASM_FILE_START
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#undef ASM_FILE_START
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#endif
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#define ASM_FILE_START(FILE) \
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do { fprintf (FILE, "\t.file\t"); \
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output_quoted_string (FILE, dump_base_name); \
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fprintf (FILE, "\n"); \
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fprintf (FILE, ".global\t__fltused\n"); \
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} while (0)
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/* A table of bytes codes used by the ASM_OUTPUT_ASCII and
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ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
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corresponds to a particular byte value [0..255]. For any
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given byte value, if the value in the corresponding table
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position is zero, the given character can be output directly.
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If the table value is 1, the byte must be output as a \ooo
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octal escape. If the tables value is anything else, then the
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byte value should be output as a \ followed by the value
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in the table. Note that we can use standard UN*X escape
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sequences for many control characters, but we don't use
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\a to represent BEL because some svr4 assemblers (e.g. on
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the i386) don't know about that. Also, we don't use \v
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since some versions of gas, such as 2.2 did not accept it. */
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#define ESCAPES \
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"\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\
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\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\
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\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\
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\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\
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\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\
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\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\
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\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\
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\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"
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/* Some svr4 assemblers have a limit on the number of characters which
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can appear in the operand of a .string directive. If your assembler
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has such a limitation, you should define STRING_LIMIT to reflect that
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limit. Note that at least some svr4 assemblers have a limit on the
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actual number of bytes in the double-quoted string, and that they
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count each character in an escape sequence as one byte. Thus, an
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escape sequence like \377 would count as four bytes.
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If your target assembler doesn't support the .string directive, you
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should define this to zero.
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*/
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#define STRING_LIMIT ((unsigned) 256)
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#define STRING_ASM_OP "\t.string\t"
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/* The routine used to output NUL terminated strings. We use a special
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version of this for most svr4 targets because doing so makes the
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generated assembly code more compact (and thus faster to assemble)
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as well as more readable, especially for targets like the i386
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(where the only alternative is to output character sequences as
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comma separated lists of numbers). */
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#define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
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do \
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{ \
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register const unsigned char *_limited_str = \
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(const unsigned char *) (STR); \
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register unsigned ch; \
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fprintf ((FILE), "%s\"", STRING_ASM_OP); \
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for (; (ch = *_limited_str); _limited_str++) \
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{ \
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register int escape = ESCAPES[ch]; \
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switch (escape) \
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{ \
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case 0: \
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putc (ch, (FILE)); \
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break; \
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case 1: \
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fprintf ((FILE), "\\%03o", ch); \
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break; \
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default: \
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putc ('\\', (FILE)); \
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putc (escape, (FILE)); \
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break; \
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} \
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} \
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fprintf ((FILE), "\"\n"); \
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} \
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while (0)
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/* The routine used to output sequences of byte values. We use a special
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version of this for most svr4 targets because doing so makes the
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generated assembly code more compact (and thus faster to assemble)
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as well as more readable. Note that if we find subparts of the
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character sequence which end with NUL (and which are shorter than
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STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
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#undef ASM_OUTPUT_ASCII
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#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
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do \
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{ \
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register const unsigned char *_ascii_bytes = \
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(const unsigned char *) (STR); \
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register const unsigned char *limit = _ascii_bytes + (LENGTH); \
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register unsigned bytes_in_chunk = 0; \
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for (; _ascii_bytes < limit; _ascii_bytes++) \
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{ \
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register const unsigned char *p; \
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if (bytes_in_chunk >= 64) \
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{ \
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fputc ('\n', (FILE)); \
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bytes_in_chunk = 0; \
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} \
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for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
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continue; \
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if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT) \
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{ \
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if (bytes_in_chunk > 0) \
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{ \
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fputc ('\n', (FILE)); \
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bytes_in_chunk = 0; \
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} \
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ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
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_ascii_bytes = p; \
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} \
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else \
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{ \
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if (bytes_in_chunk == 0) \
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fprintf ((FILE), "\t.byte\t"); \
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else \
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fputc (',', (FILE)); \
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fprintf ((FILE), "0x%02x", *_ascii_bytes); \
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bytes_in_chunk += 5; \
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} \
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} \
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if (bytes_in_chunk > 0) \
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fprintf ((FILE), "\n"); \
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} \
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while (0)
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/* Emit code to check the stack when allocating more that 4000
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bytes in one go. */
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#define CHECK_STACK_LIMIT 0x1000
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/* the following are OSF linker (not gld) specific... we don't want them */
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#undef HAS_INIT_SECTION
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#undef LD_INIT_SWITCH
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#undef LD_FINI_SWITCH
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/* Note that there appears to be two different ways to support const
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sections at the moment. You can either #define the symbol
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READONLY_DATA_SECTION (giving it some code which switches to the
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readonly data section) or else you can #define the symbols
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EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
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SELECT_RTX_SECTION. We do both here just to be on the safe side. */
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#define USE_CONST_SECTION 1
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#define CONST_SECTION_ASM_OP "\t.section\t.rdata,\"r\""
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/* A default list of other sections which we might be "in" at any given
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time. For targets that use additional sections (e.g. .tdesc) you
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should override this definition in the target-specific file which
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includes this file. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_const
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/* A default list of extra section function definitions. For targets
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that use additional sections (e.g. .tdesc) you should override this
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definition in the target-specific file which includes this file. */
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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CONST_SECTION_FUNCTION
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#undef READONLY_DATA_SECTION
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#define READONLY_DATA_SECTION() const_section ()
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#define CONST_SECTION_FUNCTION \
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void \
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const_section () \
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{ \
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if (!USE_CONST_SECTION) \
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text_section(); \
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else if (in_section != in_const) \
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{ \
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fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
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in_section = in_const; \
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} \
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}
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/* The MS compilers take alignment as a number of bytes, so we do as well */
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
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/* The linker will take care of this, and having them causes problems with
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ld -r (specifically -rU). */
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#define CTOR_LISTS_DEFINED_EXTERNALLY 1
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#define SET_ASM_OP "\t.set\t"
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/* Output a definition (implements alias) */
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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do \
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{ \
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fprintf ((FILE), "%s", SET_ASM_OP); \
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assemble_name (FILE, LABEL1); \
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fprintf (FILE, ","); \
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assemble_name (FILE, LABEL2); \
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fprintf (FILE, "\n"); \
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} \
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while (0)
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#define HOST_PTR_PRINTF "%p"
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#define HOST_PTR_AS_INT unsigned long
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#define PCC_BITFIELD_TYPE_MATTERS 1
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#define PCC_BITFIELD_TYPE_TEST TYPE_NATIVE(rec)
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#define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
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/* The following two flags are usually "off" for i386, because some non-gnu
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tools (for the i386) don't handle them. However, we don't have that
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problem, so.... */
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/* Forward references to tags are allowed. */
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#define SDB_ALLOW_FORWARD_REFERENCES
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/* Unknown tags are also allowed. */
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#define SDB_ALLOW_UNKNOWN_REFERENCES
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/* The integer half of this list needs to be constant. However, there's
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a lot of disagreement about what the floating point adjustments should
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be. We pick one that works with gdb. (The underlying problem is
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what to do about the segment registers. Since we have access to them
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from /proc, we'll allow them to be accessed in gdb, even tho the
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gcc compiler can't generate them. (There's some evidence that
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MSVC does, but possibly only for certain special "canned" sequences.) */
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#undef DBX_REGISTER_NUMBER
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#define DBX_REGISTER_NUMBER(n) \
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(TARGET_64BIT ? dbx64_register_map[n] \
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: (n) == 0 ? 0 \
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: (n) == 1 ? 2 \
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: (n) == 2 ? 1 \
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: (n) == 3 ? 3 \
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: (n) == 4 ? 6 \
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: (n) == 5 ? 7 \
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: (n) == 6 ? 5 \
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: (n) == 7 ? 4 \
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: ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n)+8 \
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: (-1))
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/* Define this macro if references to a symbol must be treated
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differently depending on something about the variable or
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function named by the symbol (such as what section it is in).
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Apply stddef, handle (as yet unimplemented) pic.
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stddef renaming does NOT apply to Alpha. */
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union tree_node;
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const char *gen_stdcall_suffix PARAMS ((union tree_node *));
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#undef ENCODE_SECTION_INFO
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#define ENCODE_SECTION_INFO(DECL) \
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do \
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{ \
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if (flag_pic) \
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{ \
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rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
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? TREE_CST_RTL (DECL) : DECL_RTL (DECL)); \
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SYMBOL_REF_FLAG (XEXP (rtl, 0)) \
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= (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
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|| ! TREE_PUBLIC (DECL)); \
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} \
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if (TREE_CODE (DECL) == FUNCTION_DECL) \
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if (lookup_attribute ("stdcall", \
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TYPE_ATTRIBUTES (TREE_TYPE (DECL)))) \
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XEXP (DECL_RTL (DECL), 0) = \
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gen_rtx (SYMBOL_REF, Pmode, gen_stdcall_suffix (DECL)); \
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} \
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while (0)
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/* This macro gets just the user-specified name
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out of the string in a SYMBOL_REF. Discard
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trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
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#undef STRIP_NAME_ENCODING
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#define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
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do { \
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const char *_p; \
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const char *_name = SYMBOL_NAME; \
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for (_p = _name; *_p && *_p != '@'; ++_p) \
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; \
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if (*_p == '@') \
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{ \
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int _len = _p - _name; \
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char *_new_name = (char *) alloca (_len + 1); \
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strncpy (_new_name, _name, _len); \
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_new_name[_len] = '\0'; \
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(VAR) = _new_name; \
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} \
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else \
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(VAR) = _name; \
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} while (0)
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#if 0
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/* Turn this back on when the linker is updated to handle grouped
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.data$ sections correctly. See corresponding note in i386/interix.c.
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MK. */
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/* Define this macro if in some cases global symbols from one translation
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unit may not be bound to undefined symbols in another translation unit
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without user intervention. For instance, under Microsoft Windows
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symbols must be explicitly imported from shared libraries (DLLs). */
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#define MULTIPLE_SYMBOL_SPACES
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extern void i386_pe_unique_section ();
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#define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
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#define SUPPORTS_ONE_ONLY 1
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/* Switch into a generic section. */
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#define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section
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#endif /* 0 */
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/* DWARF2 Unwinding doesn't work with exception handling yet. */
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#define DWARF2_UNWIND_INFO 0
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/* Don't assume anything about the header files. */
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#define NO_IMPLICIT_EXTERN_C
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