gcc/config/i386/freebsd.h

   1 /* Definitions for Intel 386 running FreeBSD with ELF format
   2    Copyright (C) 1996, 2000 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 #undef TARGET_VERSION
  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 FUNCTION_PROFILER
  51 #define FUNCTION_PROFILER(FILE, LABELNO)  \
  52 {                                                                       \
  53   if (flag_pic)                                                         \
  54       fprintf ((FILE), "\tcall *.mcount@GOT(%%ebx)\n");                 \
  55   else                                                                  \
  56       fprintf ((FILE), "\tcall .mcount\n");                             \
  57 }
  58
  59 /* Make gcc agree with <machine/ansi.h>.  */
  60
  61 #undef SIZE_TYPE
  62 #define SIZE_TYPE "unsigned int"
  63
  64 #undef PTRDIFF_TYPE
  65 #define PTRDIFF_TYPE "int"
  66
  67 #undef WCHAR_TYPE_SIZE
  68 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  69
  70 /* Provide a STARTFILE_SPEC appropriate for FreeBSD.  Here we add
  71    the magical crtbegin.o file (see crtstuff.c) which provides part
  72         of the support for getting C++ file-scope static object constructed
  73         before entering `main'.  */
  74
  75 #undef  STARTFILE_SPEC
  76 #define STARTFILE_SPEC \
  77   "%{!shared: \
  78      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  79                        %{!p:%{profile:gcrt1.o%s} \
  80                          %{!profile:crt1.o%s}}}} \
  81    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  82
  83 /* Provide a ENDFILE_SPEC appropriate for FreeBSD.  Here we tack on
  84    the magical crtend.o file (see crtstuff.c) which provides part of
  85         the support for getting C++ file-scope static object constructed
  86         before entering `main', followed by a normal "finalizer" file,
  87         `crtn.o'.  */
  88
  89 #undef  ENDFILE_SPEC
  90 #define ENDFILE_SPEC \
  91   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  92
  93 /* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
  94    for the special GCC options -static and -shared, which allow us to
  95    link things in one of these three modes by applying the appropriate
  96    combinations of options at link-time. We like to support here for
  97    as many of the other GNU linker options as possible. But I don't
  98    have the time to search for those flags. I am sure how to add
  99    support for -soname shared_object_name. H.J.
 100
 101    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 102    -Wl,-V.
 103
 104    When the -shared link option is used a final link is not being
 105    done.  */
 106
 107 #undef  LINK_SPEC
 108 #define LINK_SPEC "-m elf_i386 \
 109   %{Wl,*:%*} \
 110   %{v:-V} \
 111   %{assert*} %{R*} %{rpath*} %{defsym*} \
 112   %{shared:-Bshareable %{h*} %{soname*}} \
 113     %{!shared: \
 114       %{!static: \
 115         %{rdynamic:-export-dynamic} \
 116         %{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \
 117     %{static:-Bstatic}} \
 118   %{symbolic:-Bsymbolic}"
 119
 120 /* A C statement to output to the stdio stream FILE an assembler
 121    command to advance the location counter to a multiple of 1<<LOG
 122    bytes if it is within MAX_SKIP bytes.
 123
 124    This is used to align code labels according to Intel recommendations.  */
 125
 126 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 127 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                                  \
 128   if ((LOG) != 0) {                                                                                                             \
 129     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
 130     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
 131   }
 132 #endif