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 /* This is how to output an element of a case-vector that is relative.
  42    This is only used for PIC code.  See comments by the `casesi' insn in
  43    i386.md for an explanation of the expression this outputs. */
  44 #undef ASM_OUTPUT_ADDR_DIFF_ELT
  45 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
  46   fprintf ((FILE), "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
  47
  48 /* Indicate that jump tables go in the text section.  This is
  49    necessary when compiling PIC code.  */
  50 #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
  51
  52 #undef DBX_REGISTER_NUMBER
  53 #define DBX_REGISTER_NUMBER(n) \
  54   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  55
  56 #undef  NO_PROFILE_COUNTERS
  57 #define NO_PROFILE_COUNTERS
  58
  59 /* Tell final.c that we don't need a label passed to mcount.  */
  60
  61 #undef FUNCTION_PROFILER
  62 #define FUNCTION_PROFILER(FILE, LABELNO)  \
  63 {                                                                       \
  64   if (flag_pic)                                                         \
  65       fprintf ((FILE), "\tcall *.mcount@GOT(%%ebx)\n");                 \
  66   else                                                                  \
  67       fprintf ((FILE), "\tcall .mcount\n");                             \
  68 }
  69
  70 /* Make gcc agree with <machine/ansi.h>.  */
  71
  72 #undef SIZE_TYPE
  73 #define SIZE_TYPE "unsigned int"
  74
  75 #undef PTRDIFF_TYPE
  76 #define PTRDIFF_TYPE "int"
  77
  78 #undef WCHAR_TYPE_SIZE
  79 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  80
  81 /* Provide a STARTFILE_SPEC appropriate for FreeBSD.  Here we add
  82    the magical crtbegin.o file (see crtstuff.c) which provides part
  83         of the support for getting C++ file-scope static object constructed
  84         before entering `main'. */
  85
  86 #undef  STARTFILE_SPEC
  87 #define STARTFILE_SPEC \
  88   "%{!shared: \
  89      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  90                        %{!p:%{profile:gcrt1.o%s} \
  91                          %{!profile:crt1.o%s}}}} \
  92    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  93
  94 /* Provide a ENDFILE_SPEC appropriate for FreeBSD.  Here we tack on
  95    the magical crtend.o file (see crtstuff.c) which provides part of
  96         the support for getting C++ file-scope static object constructed
  97         before entering `main', followed by a normal "finalizer" file,
  98         `crtn.o'.  */
  99
 100 #undef  ENDFILE_SPEC
 101 #define ENDFILE_SPEC \
 102   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
 103
 104 /* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
 105    for the special GCC options -static and -shared, which allow us to
 106    link things in one of these three modes by applying the appropriate
 107    combinations of options at link-time. We like to support here for
 108    as many of the other GNU linker options as possible. But I don't
 109    have the time to search for those flags. I am sure how to add
 110    support for -soname shared_object_name. H.J.
 111
 112    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 113    -Wl,-V.
 114
 115    When the -shared link option is used a final link is not being
 116    done.  */
 117
 118 #undef  LINK_SPEC
 119 #define LINK_SPEC "-m elf_i386 \
 120   %{Wl,*:%*} \
 121   %{v:-V} \
 122   %{assert*} %{R*} %{rpath*} %{defsym*} \
 123   %{shared:-Bshareable %{h*} %{soname*}} \
 124     %{!shared: \
 125       %{!static: \
 126         %{rdynamic:-export-dynamic} \
 127         %{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \
 128     %{static:-Bstatic}} \
 129   %{symbolic:-Bsymbolic}"
 130
 131 /* A C statement to output to the stdio stream FILE an assembler
 132    command to advance the location counter to a multiple of 1<<LOG
 133    bytes if it is within MAX_SKIP bytes.
 134
 135    This is used to align code labels according to Intel recommendations.  */
 136
 137 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 138 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                                  \
 139   if ((LOG) != 0) {                                                                                                             \
 140     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
 141     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
 142   }
 143 #endif