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jeremybenn |
/* Target definitions for GCC for Intel 80386 running Interix
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Parts Copyright (C) 1991, 1999, 2000, 2002, 2003, 2004, 2007, 2008
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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 GCC.
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GCC 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 3, or (at your option)
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any later version.
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GCC 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 GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* The rest must follow. */
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#define DBX_DEBUGGING_INFO 1
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#define SDB_DEBUGGING_INFO 1
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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#define HANDLE_SYSV_PRAGMA 1
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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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We do bitfields MSVC-compatibly by default, too. */
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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 | MASK_MS_BITFIELD_LAYOUT)
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#undef TARGET_CPU_DEFAULT
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#define TARGET_CPU_DEFAULT TARGET_CPU_DEFAULT_i486
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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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#define TARGET_DECLSPEC 1
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/* cpp handles __STDC__ */
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__INTERIX"); \
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builtin_define ("__OPENNT"); \
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builtin_define ("_M_IX86=300"); \
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builtin_define ("_X86_=1"); \
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builtin_define ("__stdcall=__attribute__((__stdcall__))"); \
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builtin_define ("__cdecl=__attribute__((__cdecl__))"); \
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builtin_assert ("system=unix"); \
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builtin_assert ("system=interix"); \
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if (preprocessing_asm_p ()) \
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builtin_define_std ("LANGUAGE_ASSEMBLY"); \
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else \
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{ \
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builtin_define_std ("LANGUAGE_C"); \
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if (c_dialect_cxx ()) \
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builtin_define_std ("LANGUAGE_C_PLUS_PLUS"); \
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if (c_dialect_objc ()) \
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builtin_define_std ("LANGUAGE_OBJECTIVE_C"); \
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} \
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} \
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while (0)
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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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mieee is an Alpha specific variant. Cross pollination a bad idea.
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*/
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#define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \
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-isystem %$INTERIX_ROOT/usr/include"
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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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#undef X86_FILE_START_FLTUSED
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#define X86_FILE_START_FLTUSED 1
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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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const unsigned char *_limited_str = \
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(const unsigned char *) (STR); \
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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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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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const unsigned char *_ascii_bytes = \
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(const unsigned char *) (STR); \
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const unsigned char *limit = _ascii_bytes + (LENGTH); \
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unsigned bytes_in_chunk = 0; \
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for (; _ascii_bytes < limit; _ascii_bytes++) \
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{ \
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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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fputs (ASM_BYTE, (FILE)); \
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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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fputc ('\n', (FILE)); \
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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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/* The following are needed for us to be able to use winnt.c, but are not
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otherwise meaningful to Interix. (The functions that use these are
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never called because we don't do DLLs.) */
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#define TARGET_NOP_FUN_DLLIMPORT 1
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#define drectve_section() /* nothing */
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/* Objective-C has its own packing rules...
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Objc tries to parallel the code in stor-layout.c at runtime
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(see libobjc/encoding.c). This (compile-time) packing info isn't
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available at runtime, so it's hopeless to try.
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And if the user tries to set the flag for objc, give an error
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| 246 |
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so he has some clue. */
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#undef SUBTARGET_OVERRIDE_OPTIONS
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#define SUBTARGET_OVERRIDE_OPTIONS \
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do { \
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if (strcmp (lang_hooks.name, "GNU Objective-C") == 0) \
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{ \
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if ((target_flags & MASK_MS_BITFIELD_LAYOUT) != 0 \
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| 254 |
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&& (target_flags_explicit & MASK_MS_BITFIELD_LAYOUT) != 0) \
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{ \
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error ("ms-bitfields not supported for objc"); \
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} \
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target_flags &= ~MASK_MS_BITFIELD_LAYOUT; \
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} \
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| 260 |
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} while (0)
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| 261 |
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| 262 |
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#define EH_FRAME_IN_DATA_SECTION
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| 264 |
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#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rdata,\"r\""
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| 266 |
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/* The MS compilers take alignment as a number of bytes, so we do as well */
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| 267 |
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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| 269 |
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if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
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| 270 |
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| 271 |
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/* The linker will take care of this, and having them causes problems with
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| 272 |
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ld -r (specifically -rU). */
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| 273 |
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#define CTOR_LISTS_DEFINED_EXTERNALLY 1
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| 274 |
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| 275 |
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#define SET_ASM_OP "\t.set\t"
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| 276 |
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/* Output a definition (implements alias) */
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| 277 |
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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do \
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| 279 |
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{ \
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| 280 |
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fputs (SET_ASM_OP, (FILE)); \
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| 281 |
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assemble_name (FILE, LABEL1); \
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| 282 |
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fputc (',', (FILE)); \
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assemble_name (FILE, LABEL2); \
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| 284 |
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fputc ('\n', (FILE)); \
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} \
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| 286 |
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while (0)
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| 288 |
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#define HOST_PTR_AS_INT unsigned long
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| 290 |
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#define PCC_BITFIELD_TYPE_MATTERS 1
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| 292 |
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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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| 294 |
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problem, so.... */
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| 295 |
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| 296 |
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/* Forward references to tags are allowed. */
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| 297 |
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#define SDB_ALLOW_FORWARD_REFERENCES
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| 299 |
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/* Unknown tags are also allowed. */
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#define SDB_ALLOW_UNKNOWN_REFERENCES
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| 301 |
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| 302 |
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/* The integer half of this list needs to be constant. However, there's
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| 303 |
|
|
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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| 305 |
|
|
what to do about the segment registers. Since we have access to them
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| 306 |
|
|
from /proc, we'll allow them to be accessed in gdb, even tho the
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| 307 |
|
|
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.) */
|
| 309 |
|
|
|
| 310 |
|
|
#undef DBX_REGISTER_NUMBER
|
| 311 |
|
|
#define DBX_REGISTER_NUMBER(n) \
|
| 312 |
|
|
(TARGET_64BIT ? dbx64_register_map[n] \
|
| 313 |
|
|
: (n) == 0 ? 0 \
|
| 314 |
|
|
: (n) == 1 ? 2 \
|
| 315 |
|
|
: (n) == 2 ? 1 \
|
| 316 |
|
|
: (n) == 3 ? 3 \
|
| 317 |
|
|
: (n) == 4 ? 6 \
|
| 318 |
|
|
: (n) == 5 ? 7 \
|
| 319 |
|
|
: (n) == 6 ? 5 \
|
| 320 |
|
|
: (n) == 7 ? 4 \
|
| 321 |
|
|
: ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n)+8 \
|
| 322 |
|
|
: (-1))
|
| 323 |
|
|
|
| 324 |
|
|
/* Define this macro if references to a symbol must be treated
|
| 325 |
|
|
differently depending on something about the variable or
|
| 326 |
|
|
function named by the symbol (such as what section it is in). */
|
| 327 |
|
|
|
| 328 |
|
|
#define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info
|
| 329 |
|
|
#undef TARGET_STRIP_NAME_ENCODING
|
| 330 |
|
|
#define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full
|
| 331 |
|
|
|
| 332 |
|
|
#if 0
|
| 333 |
|
|
/* Turn this back on when the linker is updated to handle grouped
|
| 334 |
|
|
.data$ sections correctly. See corresponding note in i386/interix.c.
|
| 335 |
|
|
MK. */
|
| 336 |
|
|
|
| 337 |
|
|
/* Interix uses explicit import from shared libraries. */
|
| 338 |
|
|
#define MULTIPLE_SYMBOL_SPACES 1
|
| 339 |
|
|
|
| 340 |
|
|
extern void i386_pe_unique_section (tree, int);
|
| 341 |
|
|
#define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
|
| 342 |
|
|
#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
|
| 343 |
|
|
|
| 344 |
|
|
#define SUPPORTS_ONE_ONLY 1
|
| 345 |
|
|
#endif /* 0 */
|
| 346 |
|
|
|
| 347 |
|
|
/* Switch into a generic section. */
|
| 348 |
|
|
#define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section
|
| 349 |
|
|
|
| 350 |
|
|
/* DWARF2 Unwinding doesn't work with exception handling yet. */
|
| 351 |
|
|
#define DWARF2_UNWIND_INFO 0
|
| 352 |
|
|
|
| 353 |
|
|
/* Don't assume anything about the header files. */
|
| 354 |
|
|
#define NO_IMPLICIT_EXTERN_C
|
| 355 |
|
|
|
| 356 |
|
|
/* MSVC returns structs of up to 8 bytes via registers. */
|
| 357 |
|
|
|
| 358 |
|
|
#define DEFAULT_PCC_STRUCT_RETURN 0
|
| 359 |
|
|
|
| 360 |
|
|
#define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \
|
| 361 |
|
|
(TYPE_MODE (TYPE) == BLKmode \
|
| 362 |
|
|
|| (AGGREGATE_TYPE_P (TYPE) && int_size_in_bytes (TYPE) > 8 ))
|
