gcc/config/mips/netbsd.h

   1 /* Definitions of target machine for GNU compiler, for MIPS NetBSD systems.
   2    Copyright (C) 1993, 1995, 1996, 1997, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 /* Define default target values. */
  24
  25 #undef MACHINE_TYPE
  26 #if TARGET_ENDIAN_DEFAULT != 0
  27 #define MACHINE_TYPE "NetBSD/mipseb ELF"
  28 #else
  29 #define MACHINE_TYPE "NetBSD/mipsel ELF"
  30 #endif
  31
  32 #define TARGET_OS_CPP_BUILTINS()                        \
  33   do                                                    \
  34     {                                                   \
  35       NETBSD_OS_CPP_BUILTINS_ELF();                     \
  36       builtin_define ("__NO_LEADING_UNDERSCORES__");    \
  37       builtin_define ("__GP_SUPPORT__");                \
  38       builtin_assert ("machine=mips");                  \
  39       if (TARGET_LONG64)                                \
  40         builtin_define ("__LONG64");                    \
  41                                                         \
  42       if (mips_abi == ABI_EABI)                         \
  43         builtin_define ("__mips_eabi");                 \
  44       else if (mips_abi == ABI_N32)                     \
  45         builtin_define ("__mips_n32");                  \
  46       else if (mips_abi == ABI_64)                      \
  47         builtin_define ("__mips_n64");                  \
  48       else if (mips_abi == ABI_O64)                     \
  49         builtin_define ("__mips_o64");                  \
  50     }                                                   \
  51   while (0)
  52
  53 /* The generic MIPS TARGET_CPU_CPP_BUILTINS are incorrect for NetBSD.
  54    Specifically, they define too many namespace-invasive macros.  Override
  55    them here.  Note this is structured for easy comparison to the version
  56    in mips.h.
  57
  58    FIXME: This probably isn't the best solution.  But in the absense
  59    of something better, it will have to do, for now.  */
  60
  61 #undef TARGET_CPU_CPP_BUILTINS
  62 #define TARGET_CPU_CPP_BUILTINS()                               \
  63   do                                                            \
  64     {                                                           \
  65       builtin_assert ("cpu=mips");                              \
  66       builtin_define ("__mips__");                              \
  67       builtin_define ("_mips");                                 \
  68                                                                 \
  69       /* No _R3000 or _R4000.  */                               \
  70       if (TARGET_64BIT)                                         \
  71         builtin_define ("__mips64");                            \
  72                                                                 \
  73       if (TARGET_FLOAT64)                                       \
  74         builtin_define ("__mips_fpr=64");                       \
  75       else                                                      \
  76         builtin_define ("__mips_fpr=32");                       \
  77                                                                 \
  78       if (TARGET_MIPS16)                                        \
  79         builtin_define ("__mips16");                            \
  80                                                                 \
  81       MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info);    \
  82       MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info);    \
  83                                                                 \
  84       if (ISA_MIPS1)                                            \
  85         builtin_define ("__mips=1");                            \
  86       else if (ISA_MIPS2)                                       \
  87         builtin_define ("__mips=2");                            \
  88       else if (ISA_MIPS3)                                       \
  89         builtin_define ("__mips=3");                            \
  90       else if (ISA_MIPS4)                                       \
  91         builtin_define ("__mips=4");                            \
  92       else if (ISA_MIPS32)                                      \
  93         builtin_define ("__mips=32");                           \
  94       else if (ISA_MIPS64)                                      \
  95         builtin_define ("__mips=64");                           \
  96                                                                 \
  97       if (TARGET_HARD_FLOAT)                                    \
  98         builtin_define ("__mips_hard_float");                   \
  99       else if (TARGET_SOFT_FLOAT)                               \
 100         builtin_define ("__mips_soft_float");                   \
 101                                                                 \
 102       if (TARGET_SINGLE_FLOAT)                                  \
 103         builtin_define ("__mips_single_float");                 \
 104                                                                 \
 105       if (TARGET_BIG_ENDIAN)                                    \
 106         builtin_define ("__MIPSEB__");                          \
 107       else                                                      \
 108         builtin_define ("__MIPSEL__");                          \
 109                                                                 \
 110       /* No language dialect defines.  */                       \
 111                                                                 \
 112       /* ABIs handled in TARGET_OS_CPP_BUILTINS.  */            \
 113     }                                                           \
 114   while (0)
 115
 116
 117 /* Include the generic MIPS ELF configuration.  */
 118 #include <mips/elf.h>
 119
 120 /* Now clean up after it.  */
 121 #undef MD_EXEC_PREFIX
 122 #undef MD_STARTFILE_PREFIX
 123
 124 /* Get generic NetBSD definitions.  */
 125 #include <netbsd.h>
 126
 127
 128 /* Get generic NetBSD ELF definitions.  */
 129 #include <netbsd-elf.h>
 130
 131
 132 /* Extra specs we need.  */
 133 #undef SUBTARGET_EXTRA_SPECS
 134 #define SUBTARGET_EXTRA_SPECS                                           \
 135   { "netbsd_cpp_spec",          NETBSD_CPP_SPEC },                      \
 136   { "netbsd_link_spec",         NETBSD_LINK_SPEC_ELF },                 \
 137   { "netbsd_entry_point",       NETBSD_ENTRY_POINT },
 138
 139 /* Provide a SUBTARGET_CPP_SPEC appropriate for NetBSD.  */
 140
 141 #undef SUBTARGET_CPP_SPEC
 142 #define SUBTARGET_CPP_SPEC "%(netbsd_cpp_spec)"
 143
 144 /* Provide a LINK_SPEC appropriate for a NetBSD/mips target.
 145    This is a copy of LINK_SPEC from <netbsd-elf.h> tweaked for
 146    the MIPS target.  */
 147
 148 #undef LINK_SPEC
 149 #define LINK_SPEC \
 150   "%{EL:-m elf32lmip} \
 151    %{EB:-m elf32bmip} \
 152    %(endian_spec) \
 153    %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips64} \
 154    %{bestGnum} %{call_shared} %{no_archive} %{exact_version} \
 155    %(netbsd_link_spec)"
 156
 157 #define NETBSD_ENTRY_POINT "__start"
 158
 159 #undef SUBTARGET_ASM_SPEC
 160 #define SUBTARGET_ASM_SPEC                                              \
 161   "%{!fno-PIC:%{!fno-pic:-KPIC}}"
 162
 163
 164 /* -G is incompatible with -KPIC which is the default, so only allow objects
 165    in the small data section if the user explicitly asks for it.  */
 166
 167 #undef MIPS_DEFAULT_GVALUE
 168 #define MIPS_DEFAULT_GVALUE 0
 169
 170
 171 /* This defines which switch letters take arguments.  -G is a MIPS
 172    special.  */
 173
 174 #undef SWITCH_TAKES_ARG
 175 #define SWITCH_TAKES_ARG(CHAR)                                          \
 176   (DEFAULT_SWITCH_TAKES_ARG (CHAR)                                      \
 177    || (CHAR) == 'R'                                                     \
 178    || (CHAR) == 'G')
 179
 180
 181 #undef ASM_FINAL_SPEC
 182 #undef SET_ASM_OP
 183
 184
 185 /* NetBSD hasn't historically provided _flush_cache(), but rather
 186    _cacheflush(), which takes the same arguments as the former.  */
 187 #undef CACHE_FLUSH_FUNC
 188 #define CACHE_FLUSH_FUNC "_cacheflush"
 189
 190
 191 /* Make gcc agree with <machine/ansi.h> */
 192
 193 #undef WCHAR_TYPE
 194 #define WCHAR_TYPE "int"
 195
 196 #undef WCHAR_TYPE_SIZE
 197 #define WCHAR_TYPE_SIZE 32
 198
 199 #undef WINT_TYPE
 200 #define WINT_TYPE "int"