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