gcc/config/mips/linux.h

   1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef WCHAR_TYPE
  22 #define WCHAR_TYPE "int"
  23
  24 #undef WCHAR_TYPE_SIZE
  25 #define WCHAR_TYPE_SIZE 32
  26
  27 #undef ASM_DECLARE_OBJECT_NAME
  28 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  29
  30 #undef TARGET_VERSION
  31 #if TARGET_ENDIAN_DEFAULT == 0
  32 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
  33 #else
  34 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
  35 #endif
  36
  37 #undef MD_EXEC_PREFIX
  38 #undef MD_STARTFILE_PREFIX
  39
  40 /* If we don't set MASK_ABICALLS, we can't default to PIC.  */
  41 #undef TARGET_DEFAULT
  42 #define TARGET_DEFAULT MASK_ABICALLS
  43
  44 #define TARGET_OS_CPP_BUILTINS()                                \
  45   do {                                                          \
  46     LINUX_TARGET_OS_CPP_BUILTINS();                             \
  47     /* The GNU C++ standard library requires this.  */          \
  48     if (c_dialect_cxx ())                                       \
  49       builtin_define ("_GNU_SOURCE");                           \
  50   } while (0)
  51
  52 #undef SUBTARGET_CPP_SPEC
  53 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  54
  55 /* A standard GNU/Linux mapping.  On most targets, it is included in
  56    CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
  57    and provides this hook instead.  */
  58 #undef SUBTARGET_CC1_SPEC
  59 #define SUBTARGET_CC1_SPEC "%{profile:-p}"
  60
  61 /* From iris5.h */
  62 /* -G is incompatible with -KPIC which is the default, so only allow objects
  63    in the small data section if the user explicitly asks for it.  */
  64 #undef MIPS_DEFAULT_GVALUE
  65 #define MIPS_DEFAULT_GVALUE 0
  66
  67 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
  68
  69 /* Borrowed from sparc/linux.h */
  70 #undef LINK_SPEC
  71 #define LINK_SPEC \
  72  "%(endian_spec) \
  73   %{shared:-shared} \
  74   %{!shared: \
  75     %{!ibcs: \
  76       %{!static: \
  77         %{rdynamic:-export-dynamic} \
  78         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
  79         %{static:-static}}}"
  80
  81 #undef SUBTARGET_ASM_SPEC
  82 #define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"
  83
  84 /* The MIPS assembler has different syntax for .set. We set it to
  85    .dummy to trap any errors.  */
  86 #undef SET_ASM_OP
  87 #define SET_ASM_OP "\t.dummy\t"
  88
  89 #undef ASM_OUTPUT_DEF
  90 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  91  do {                                                                   \
  92         fputc ( '\t', FILE);                                            \
  93         assemble_name (FILE, LABEL1);                                   \
  94         fputs ( " = ", FILE);                                           \
  95         assemble_name (FILE, LABEL2);                                   \
  96         fputc ( '\n', FILE);                                            \
  97  } while (0)
  98
  99 #undef ASM_DECLARE_FUNCTION_NAME
 100 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)                   \
 101   do {                                                                  \
 102     if (!flag_inhibit_size_directive)                                   \
 103       {                                                                 \
 104         fputs ("\t.ent\t", STREAM);                                     \
 105         assemble_name (STREAM, NAME);                                   \
 106         putc ('\n', STREAM);                                            \
 107       }                                                                 \
 108     ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function");               \
 109     assemble_name (STREAM, NAME);                                       \
 110     fputs (":\n", STREAM);                                              \
 111   } while (0)
 112
 113 #undef ASM_DECLARE_FUNCTION_SIZE
 114 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)                   \
 115   do {                                                                  \
 116     if (!flag_inhibit_size_directive)                                   \
 117       {                                                                 \
 118         fputs ("\t.end\t", STREAM);                                     \
 119         assemble_name (STREAM, NAME);                                   \
 120         putc ('\n', STREAM);                                            \
 121       }                                                                 \
 122   } while (0)
 123
 124 /* Tell function_prologue in mips.c that we have already output the .ent/.end
 125    pseudo-ops.  */
 126 #undef FUNCTION_NAME_ALREADY_DECLARED
 127 #define FUNCTION_NAME_ALREADY_DECLARED 1
 128
 129 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
 130    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
 131    presence of $gp-relative calls.  */
 132 #undef ASM_OUTPUT_REG_PUSH
 133 #undef ASM_OUTPUT_REG_POP
 134
 135 #undef LIB_SPEC
 136 #define LIB_SPEC "\
 137 %{pthread:-lpthread} \
 138 %{shared:-lc} \
 139 %{!shared: \
 140   %{profile:-lc_p} %{!profile:-lc}}"
 141
 142 #define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"
 143
 144 #ifdef HAVE_AS_NO_SHARED
 145 /* Default to -mno-shared for non-PIC.  */
 146 # define NO_SHARED_SPECS \
 147   "%{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
 148 #else
 149 # define NO_SHARED_SPECS ""
 150 #endif
 151
 152 /* -march=native handling only makes sense with compiler running on
 153    a MIPS chip.  */
 154 #if defined(__mips__)
 155 extern const char *host_detect_local_cpu (int argc, const char **argv);
 156 # define EXTRA_SPEC_FUNCTIONS \
 157   { "local_cpu_detect", host_detect_local_cpu },
 158
 159 # define MARCH_MTUNE_NATIVE_SPECS                               \
 160   " %{march=native:%<march=native %:local_cpu_detect(arch)}"    \
 161   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 162 #else
 163 # define MARCH_MTUNE_NATIVE_SPECS ""
 164 #endif
 165
 166 #define BASE_DRIVER_SELF_SPECS \
 167   NO_SHARED_SPECS \
 168   MARCH_MTUNE_NATIVE_SPECS
 169 #define DRIVER_SELF_SPECS BASE_DRIVER_SELF_SPECS