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)  svr4_dbx_register_map[n]
  54
  55 #undef  NO_PROFILE_COUNTERS
  56 #define NO_PROFILE_COUNTERS
  57
  58 /* Tell final.c that we don't need a label passed to mcount.  */
  59
  60 #undef FUNCTION_PROFILER
  61 #define FUNCTION_PROFILER(FILE, LABELNO)  \
  62 {                                                                       \
  63   if (flag_pic)                                                         \
  64       fprintf ((FILE), "\tcall *.mcount@GOT(%%ebx)\n");                 \
  65   else                                                                  \
  66       fprintf ((FILE), "\tcall .mcount\n");                             \
  67 }
  68
  69 /* Make gcc agree with <machine/ansi.h>.  */
  70
  71 #undef SIZE_TYPE
  72 #define SIZE_TYPE "unsigned int"
  73
  74 #undef PTRDIFF_TYPE
  75 #define PTRDIFF_TYPE "int"
  76
  77 #undef WCHAR_TYPE_SIZE
  78 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  79
  80 #undef CPP_PREDEFINES
  81 #define CPP_PREDEFINES "-Dunix -D__ELF__ -D__FreeBSD__\
  82  -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  83
  84 /* Provide a STARTFILE_SPEC appropriate for FreeBSD.  Here we add
  85    the magical crtbegin.o file (see crtstuff.c) which provides part
  86         of the support for getting C++ file-scope static object constructed
  87         before entering `main'. */
  88
  89 #undef  STARTFILE_SPEC
  90 #define STARTFILE_SPEC \
  91   "%{!shared: \
  92      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  93                        %{!p:%{profile:gcrt1.o%s} \
  94                          %{!profile:crt1.o%s}}}} \
  95    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  96
  97 /* Provide a ENDFILE_SPEC appropriate for FreeBSD.  Here we tack on
  98    the magical crtend.o file (see crtstuff.c) which provides part of
  99         the support for getting C++ file-scope static object constructed
 100         before entering `main', followed by a normal "finalizer" file,
 101         `crtn.o'.  */
 102
 103 #undef  ENDFILE_SPEC
 104 #define ENDFILE_SPEC \
 105   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
 106
 107 /* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
 108    for the special GCC options -static and -shared, which allow us to
 109    link things in one of these three modes by applying the appropriate
 110    combinations of options at link-time. We like to support here for
 111    as many of the other GNU linker options as possible. But I don't
 112    have the time to search for those flags. I am sure how to add
 113    support for -soname shared_object_name. H.J.
 114
 115    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 116    -Wl,-V.
 117
 118    When the -shared link option is used a final link is not being
 119    done.  */
 120
 121 #undef  LINK_SPEC
 122 #define LINK_SPEC "-m elf_i386 \
 123   %{Wl,*:%*} \
 124   %{v:-V} \
 125   %{assert*} %{R*} %{rpath*} %{defsym*} \
 126   %{shared:-Bshareable %{h*} %{soname*}} \
 127     %{!shared: \
 128       %{!static: \
 129         %{rdynamic:-export-dynamic} \
 130         %{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \
 131     %{static:-Bstatic}} \
 132   %{symbolic:-Bsymbolic}"
 133
 134 /* A C statement to output to the stdio stream FILE an assembler
 135    command to advance the location counter to a multiple of 1<<LOG
 136    bytes if it is within MAX_SKIP bytes.
 137
 138    This is used to align code labels according to Intel recommendations.  */
 139
 140 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 141 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                                  \
 142   if ((LOG) != 0) {                                                                                                             \
 143     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
 144     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
 145   }
 146 #endif