gcc/config/i386/freebsd.h

   1 /* Definitions for Intel 386 running FreeBSD with ELF format
   2    Copyright (C) 1996, 2000, 2002 Free Software Foundation, Inc.
   3    Contributed by Eric Youngdale.
   4    Modified for stabs-in-ELF by H.J. Lu.
   5    Adapted from GNU/Linux version by John Polstra.
   6    Continued development by David O'Brien <obrien@freebsd.org>
   7
   8 This file is part of GNU CC.
   9
  10 GNU CC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 GNU CC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU CC; see the file COPYING.  If not, write to
  22 the Free Software Foundation, 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25
  26 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
  27
  28 /* Override the default comment-starter of "/".  */
  29 #undef ASM_COMMENT_START
  30 #define ASM_COMMENT_START "#"
  31
  32 #undef ASM_APP_ON
  33 #define ASM_APP_ON "#APP\n"
  34
  35 #undef ASM_APP_OFF
  36 #define ASM_APP_OFF "#NO_APP\n"
  37
  38 #undef SET_ASM_OP
  39 #define SET_ASM_OP      "\t.set\t"
  40
  41 #undef DBX_REGISTER_NUMBER
  42 #define DBX_REGISTER_NUMBER(n) \
  43   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  44
  45 #undef  NO_PROFILE_COUNTERS
  46 #define NO_PROFILE_COUNTERS
  47
  48 /* Tell final.c that we don't need a label passed to mcount.  */
  49
  50 #undef MCOUNT_NAME
  51 #define MCOUNT_NAME ".mcount"
  52
  53 /* Make gcc agree with <machine/ansi.h>.  */
  54
  55 #undef SIZE_TYPE
  56 #define SIZE_TYPE "unsigned int"
  57
  58 #undef PTRDIFF_TYPE
  59 #define PTRDIFF_TYPE "int"
  60
  61 #undef WCHAR_TYPE_SIZE
  62 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  63
  64 /* Provide a STARTFILE_SPEC appropriate for FreeBSD.  Here we add
  65    the magical crtbegin.o file (see crtstuff.c) which provides part
  66         of the support for getting C++ file-scope static object constructed
  67         before entering `main'.  */
  68
  69 #undef  STARTFILE_SPEC
  70 #define STARTFILE_SPEC \
  71   "%{!shared: \
  72      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  73                        %{!p:%{profile:gcrt1.o%s} \
  74                          %{!profile:crt1.o%s}}}} \
  75    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  76
  77 /* Provide a ENDFILE_SPEC appropriate for FreeBSD.  Here we tack on
  78    the magical crtend.o file (see crtstuff.c) which provides part of
  79         the support for getting C++ file-scope static object constructed
  80         before entering `main', followed by a normal "finalizer" file,
  81         `crtn.o'.  */
  82
  83 #undef  ENDFILE_SPEC
  84 #define ENDFILE_SPEC \
  85   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  86
  87 /* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
  88    for the special GCC options -static and -shared, which allow us to
  89    link things in one of these three modes by applying the appropriate
  90    combinations of options at link-time. We like to support here for
  91    as many of the other GNU linker options as possible. But I don't
  92    have the time to search for those flags. I am sure how to add
  93    support for -soname shared_object_name. H.J.
  94
  95    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
  96    -Wl,-V.
  97
  98    When the -shared link option is used a final link is not being
  99    done.  */
 100
 101 #undef  LINK_SPEC
 102 #define LINK_SPEC "\
 103   %{Wl,*:%*} \
 104   %{v:-V} \
 105   %{assert*} %{R*} %{rpath*} %{defsym*} \
 106   %{shared:-Bshareable %{h*} %{soname*}} \
 107     %{!shared: \
 108       %{!static: \
 109         %{rdynamic:-export-dynamic} \
 110         %{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \
 111     %{static:-Bstatic}} \
 112   %{symbolic:-Bsymbolic}"
 113
 114 /* A C statement to output to the stdio stream FILE an assembler
 115    command to advance the location counter to a multiple of 1<<LOG
 116    bytes if it is within MAX_SKIP bytes.
 117
 118    This is used to align code labels according to Intel recommendations.  */
 119
 120 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 121 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                                  \
 122   if ((LOG) != 0) {                                                                                                             \
 123     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
 124     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
 125   }
 126 #endif
 127
 128 /* Don't default to pcc-struct-return, we want to retain compatibility with
 129    older gcc versions AND pcc-struct-return is nonreentrant.
 130    (even though the SVR4 ABI for the i386 says that records and unions are
 131    returned in memory).  */
 132
 133 #undef  DEFAULT_PCC_STRUCT_RETURN
 134 #define DEFAULT_PCC_STRUCT_RETURN 0