contrib/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    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 2, 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 COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 #undef WCHAR_TYPE
  23 #define WCHAR_TYPE "int"
  24
  25 #undef WCHAR_TYPE_SIZE
  26 #define WCHAR_TYPE_SIZE 32
  27
  28 /* If defined, a C expression whose value is a string containing the
  29    assembler operation to identify the following data as
  30    uninitialized global data.  If not defined, and neither
  31    `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
  32    uninitialized global data will be output in the data section if
  33    `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
  34    used.  */
  35 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
  36
  37 #define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss
  38
  39 #undef ASM_DECLARE_OBJECT_NAME
  40 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  41
  42 #undef TARGET_VERSION
  43 #if TARGET_ENDIAN_DEFAULT == 0
  44 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
  45 #else
  46 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
  47 #endif
  48
  49 #undef MD_EXEC_PREFIX
  50 #undef MD_STARTFILE_PREFIX
  51
  52 /* If we don't set MASK_ABICALLS, we can't default to PIC.  */
  53 #undef TARGET_DEFAULT
  54 #define TARGET_DEFAULT MASK_ABICALLS
  55
  56 #define TARGET_OS_CPP_BUILTINS()                                \
  57   do {                                                          \
  58     LINUX_TARGET_OS_CPP_BUILTINS();                             \
  59     /* The GNU C++ standard library requires this.  */          \
  60     if (c_dialect_cxx ())                                       \
  61       builtin_define ("_GNU_SOURCE");                           \
  62                                                                 \
  63     if (mips_abi == ABI_N32)                                    \
  64       {                                                         \
  65         builtin_define ("_ABIN32=2");                           \
  66         builtin_define ("_MIPS_SIM=_ABIN32");                   \
  67         builtin_define ("_MIPS_SZLONG=32");                     \
  68         builtin_define ("_MIPS_SZPTR=32");                      \
  69       }                                                         \
  70     else if (mips_abi == ABI_64)                                \
  71       {                                                         \
  72         builtin_define ("_ABI64=3");                            \
  73         builtin_define ("_MIPS_SIM=_ABI64");                    \
  74         builtin_define ("_MIPS_SZLONG=64");                     \
  75         builtin_define ("_MIPS_SZPTR=64");                      \
  76       }                                                         \
  77     else                                                        \
  78       {                                                         \
  79         builtin_define ("_ABIO32=1");                           \
  80         builtin_define ("_MIPS_SIM=_ABIO32");                   \
  81         builtin_define ("_MIPS_SZLONG=32");                     \
  82         builtin_define ("_MIPS_SZPTR=32");                      \
  83       }                                                         \
  84     if (TARGET_FLOAT64)                                         \
  85       builtin_define ("_MIPS_FPSET=32");                        \
  86     else                                                        \
  87       builtin_define ("_MIPS_FPSET=16");                        \
  88                                                                 \
  89     builtin_define ("_MIPS_SZINT=32");                          \
  90   } while (0)
  91
  92 #undef SUBTARGET_CPP_SPEC
  93 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  94
  95 /* A standard GNU/Linux mapping.  On most targets, it is included in
  96    CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
  97    and provides this hook instead.  */
  98 #undef SUBTARGET_CC1_SPEC
  99 #define SUBTARGET_CC1_SPEC "%{profile:-p}"
 100
 101 /* From iris5.h */
 102 /* -G is incompatible with -KPIC which is the default, so only allow objects
 103    in the small data section if the user explicitly asks for it.  */
 104 #undef MIPS_DEFAULT_GVALUE
 105 #define MIPS_DEFAULT_GVALUE 0
 106
 107 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
 108
 109 /* Borrowed from sparc/linux.h */
 110 #undef LINK_SPEC
 111 #define LINK_SPEC \
 112  "%(endian_spec) \
 113   %{shared:-shared} \
 114   %{!shared: \
 115     %{!ibcs: \
 116       %{!static: \
 117         %{rdynamic:-export-dynamic} \
 118         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
 119         %{static:-static}}}"
 120
 121 #undef SUBTARGET_ASM_SPEC
 122 #define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"
 123
 124 /* The MIPS assembler has different syntax for .set. We set it to
 125    .dummy to trap any errors.  */
 126 #undef SET_ASM_OP
 127 #define SET_ASM_OP "\t.dummy\t"
 128
 129 #undef ASM_OUTPUT_DEF
 130 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 131  do {                                                                   \
 132         fputc ( '\t', FILE);                                            \
 133         assemble_name (FILE, LABEL1);                                   \
 134         fputs ( " = ", FILE);                                           \
 135         assemble_name (FILE, LABEL2);                                   \
 136         fputc ( '\n', FILE);                                            \
 137  } while (0)
 138
 139 #undef ASM_DECLARE_FUNCTION_NAME
 140 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)                   \
 141   do {                                                                  \
 142     if (!flag_inhibit_size_directive)                                   \
 143       {                                                                 \
 144         fputs ("\t.ent\t", STREAM);                                     \
 145         assemble_name (STREAM, NAME);                                   \
 146         putc ('\n', STREAM);                                            \
 147       }                                                                 \
 148     ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function");               \
 149     assemble_name (STREAM, NAME);                                       \
 150     fputs (":\n", STREAM);                                              \
 151   } while (0)
 152
 153 #undef ASM_DECLARE_FUNCTION_SIZE
 154 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)                   \
 155   do {                                                                  \
 156     if (!flag_inhibit_size_directive)                                   \
 157       {                                                                 \
 158         fputs ("\t.end\t", STREAM);                                     \
 159         assemble_name (STREAM, NAME);                                   \
 160         putc ('\n', STREAM);                                            \
 161       }                                                                 \
 162   } while (0)
 163
 164 /* Tell function_prologue in mips.c that we have already output the .ent/.end
 165    pseudo-ops.  */
 166 #undef FUNCTION_NAME_ALREADY_DECLARED
 167 #define FUNCTION_NAME_ALREADY_DECLARED 1
 168
 169 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
 170    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
 171    presence of $gp-relative calls.  */
 172 #undef ASM_OUTPUT_REG_PUSH
 173 #undef ASM_OUTPUT_REG_POP
 174
 175 #undef LIB_SPEC
 176 #define LIB_SPEC "\
 177 %{shared: -lc} \
 178 %{!shared: %{pthread:-lpthread} \
 179   %{profile:-lc_p} %{!profile: -lc}}"
 180
 181 #define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"