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
   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     if (TARGET_ABICALLS)                                        \
  60       {                                                         \
  61         builtin_define ("__PIC__");                             \
  62         builtin_define ("__pic__");                             \
  63       }                                                         \
  64     /* The GNU C++ standard library requires this.  */          \
  65     if (c_dialect_cxx ())                                       \
  66       builtin_define ("_GNU_SOURCE");                           \
  67                                                                 \
  68     if (mips_abi == ABI_N32)                                    \
  69       {                                                         \
  70         builtin_define ("_ABIN32=2");                           \
  71         builtin_define ("_MIPS_SIM=_ABIN32");                   \
  72         builtin_define ("_MIPS_SZLONG=32");                     \
  73         builtin_define ("_MIPS_SZPTR=32");                      \
  74       }                                                         \
  75     else if (mips_abi == ABI_64)                                \
  76       {                                                         \
  77         builtin_define ("_ABI64=3");                            \
  78         builtin_define ("_MIPS_SIM=_ABI64");                    \
  79         builtin_define ("_MIPS_SZLONG=64");                     \
  80         builtin_define ("_MIPS_SZPTR=64");                      \
  81       }                                                         \
  82     else                                                        \
  83       {                                                         \
  84         builtin_define ("_ABIO32=1");                           \
  85         builtin_define ("_MIPS_SIM=_ABIO32");                   \
  86         builtin_define ("_MIPS_SZLONG=32");                     \
  87         builtin_define ("_MIPS_SZPTR=32");                      \
  88       }                                                         \
  89     if (TARGET_FLOAT64)                                         \
  90       builtin_define ("_MIPS_FPSET=32");                        \
  91     else                                                        \
  92       builtin_define ("_MIPS_FPSET=16");                        \
  93                                                                 \
  94     builtin_define ("_MIPS_SZINT=32");                          \
  95   } while (0)
  96
  97 #undef  SUBTARGET_CPP_SPEC
  98 #define SUBTARGET_CPP_SPEC "%{pthread:-D_REENTRANT}"
  99
 100 /* From iris5.h */
 101 /* -G is incompatible with -KPIC which is the default, so only allow objects
 102    in the small data section if the user explicitly asks for it.  */
 103 #undef MIPS_DEFAULT_GVALUE
 104 #define MIPS_DEFAULT_GVALUE 0
 105
 106 /* Borrowed from sparc/linux.h */
 107 #undef LINK_SPEC
 108 #define LINK_SPEC \
 109  "%(endian_spec) \
 110   %{shared:-shared} \
 111   %{!shared: \
 112     %{!ibcs: \
 113       %{!static: \
 114         %{rdynamic:-export-dynamic} \
 115         %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
 116         %{static:-static}}}"
 117
 118 #undef SUBTARGET_ASM_SPEC
 119 #define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"
 120
 121 /* The MIPS assembler has different syntax for .set. We set it to
 122    .dummy to trap any errors.  */
 123 #undef SET_ASM_OP
 124 #define SET_ASM_OP "\t.dummy\t"
 125
 126 #undef ASM_OUTPUT_DEF
 127 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 128  do {                                                                   \
 129         fputc ( '\t', FILE);                                            \
 130         assemble_name (FILE, LABEL1);                                   \
 131         fputs ( " = ", FILE);                                           \
 132         assemble_name (FILE, LABEL2);                                   \
 133         fputc ( '\n', FILE);                                            \
 134  } while (0)
 135
 136 #undef ASM_DECLARE_FUNCTION_NAME
 137 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)                   \
 138   do {                                                                  \
 139     if (!flag_inhibit_size_directive)                                   \
 140       {                                                                 \
 141         fputs ("\t.ent\t", STREAM);                                     \
 142         assemble_name (STREAM, NAME);                                   \
 143         putc ('\n', STREAM);                                            \
 144       }                                                                 \
 145     ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function");               \
 146     assemble_name (STREAM, NAME);                                       \
 147     fputs (":\n", STREAM);                                              \
 148   } while (0)
 149
 150 #undef ASM_DECLARE_FUNCTION_SIZE
 151 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)                   \
 152   do {                                                                  \
 153     if (!flag_inhibit_size_directive)                                   \
 154       {                                                                 \
 155         fputs ("\t.end\t", STREAM);                                     \
 156         assemble_name (STREAM, NAME);                                   \
 157         putc ('\n', STREAM);                                            \
 158       }                                                                 \
 159   } while (0)
 160
 161 /* Tell function_prologue in mips.c that we have already output the .ent/.end
 162    pseudo-ops.  */
 163 #undef FUNCTION_NAME_ALREADY_DECLARED
 164 #define FUNCTION_NAME_ALREADY_DECLARED 1
 165
 166 /* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
 167    it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
 168    presence of $gp-relative calls.  */
 169 #undef ASM_OUTPUT_REG_PUSH
 170 #undef ASM_OUTPUT_REG_POP
 171
 172 #undef LIB_SPEC
 173 #define LIB_SPEC "\
 174 %{shared: -lc} \
 175 %{!shared: %{pthread:-lpthread} \
 176   %{profile:-lc_p} %{!profile: -lc}}"
 177
 178 #define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"