gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006,
   3    2007 Free Software Foundation, Inc.
   4    Contributed by Eddie C. Dost (ecd@skynet.be)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #define TARGET_OS_CPP_BUILTINS()                \
  23   do                                            \
  24     {                                           \
  25       LINUX_TARGET_OS_CPP_BUILTINS();           \
  26       if (TARGET_LONG_DOUBLE_128)               \
  27         builtin_define ("__LONG_DOUBLE_128__"); \
  28     }                                           \
  29   while (0)
  30
  31 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  32    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  33    provides part of the support for getting C++ file-scope static
  34    object constructed before entering `main', followed by a normal
  35    GNU/Linux "finalizer" file, `crtn.o'.  */
  36
  37 #undef  ENDFILE_SPEC
  38 #define ENDFILE_SPEC \
  39   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  40    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  41
  42 /* This is for -profile to use -lc_p instead of -lc.  */
  43 #undef  CC1_SPEC
  44 #define CC1_SPEC "%{profile:-p} \
  45 %{sun4:} %{target:} \
  46 %{mcypress:-mcpu=cypress} \
  47 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  48 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  49 "
  50
  51 #undef TARGET_VERSION
  52 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  53
  54 #undef SIZE_TYPE
  55 #define SIZE_TYPE "unsigned int"
  56
  57 #undef PTRDIFF_TYPE
  58 #define PTRDIFF_TYPE "int"
  59
  60 #undef WCHAR_TYPE
  61 #define WCHAR_TYPE "int"
  62
  63 #undef WCHAR_TYPE_SIZE
  64 #define WCHAR_TYPE_SIZE 32
  65
  66 #undef CPP_SUBTARGET_SPEC
  67 #define CPP_SUBTARGET_SPEC \
  68 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  69
  70 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  71    for the special GCC options -static and -shared, which allow us to
  72    link things in one of these three modes by applying the appropriate
  73    combinations of options at link-time. We like to support here for
  74    as many of the other GNU linker options as possible. But I don't
  75    have the time to search for those flags. I am sure how to add
  76    support for -soname shared_object_name. H.J.
  77
  78    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
  79    -Wl,-V.
  80
  81    When the -shared link option is used a final link is not being
  82    done.  */
  83
  84 /* If ELF is the default format, we should not use /lib/elf.  */
  85
  86 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
  87
  88 #undef  LINK_SPEC
  89 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
  90   %{!mno-relax:%{!r:-relax}} \
  91   %{!shared: \
  92     %{!ibcs: \
  93       %{!static: \
  94         %{rdynamic:-export-dynamic} \
  95         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
  96         %{static:-static}}}"
  97
  98 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
  99    It's safe to pass -s always, even if -g is not used.  */
 100 #undef ASM_SPEC
 101 #define ASM_SPEC \
 102   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 103    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 104
 105 /* Same as sparc.h */
 106 #undef DBX_REGISTER_NUMBER
 107 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 108
 109 #undef ASM_OUTPUT_ALIGNED_LOCAL
 110 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 111 do {                                                                    \
 112   fputs ("\t.local\t", (FILE));         \
 113   assemble_name ((FILE), (NAME));                                       \
 114   putc ('\n', (FILE));                                                  \
 115   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 116 } while (0)
 117
 118 #undef COMMON_ASM_OP
 119 #define COMMON_ASM_OP "\t.common\t"
 120
 121 #undef  LOCAL_LABEL_PREFIX
 122 #define LOCAL_LABEL_PREFIX  "."
 123
 124 /* This is how to store into the string LABEL
 125    the symbol_ref name of an internal numbered label where
 126    PREFIX is the class of label and NUM is the number within the class.
 127    This is suitable for output with `assemble_name'.  */
 128
 129 #undef  ASM_GENERATE_INTERNAL_LABEL
 130 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 131   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 132
 133 \f
 134 /* Define for support of TFmode long double.
 135    SPARC ABI says that long double is 4 words.  */
 136 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 137
 138 /* Define this to set long double type size to use in libgcc2.c, which can
 139    not depend on target_flags.  */
 140 #ifdef __LONG_DOUBLE_128__
 141 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 142 #else
 143 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 144 #endif
 145
 146 #undef DITF_CONVERSION_LIBFUNCS
 147 #define DITF_CONVERSION_LIBFUNCS 1
 148 \f
 149 #ifdef HAVE_AS_TLS
 150 #undef TARGET_SUN_TLS
 151 #undef TARGET_GNU_TLS
 152 #define TARGET_SUN_TLS 0
 153 #define TARGET_GNU_TLS 1
 154 #endif
 155 \f
 156 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 157 #undef CTORS_SECTION_ASM_OP
 158 #undef DTORS_SECTION_ASM_OP
 159
 160 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 161
 162 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 163    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 164    change their minds.  */
 165 #undef SPARC_RELAXED_ORDERING
 166 #define SPARC_RELAXED_ORDERING true
 167
 168 #undef NEED_INDICATE_EXEC_STACK
 169 #define NEED_INDICATE_EXEC_STACK 1
 170
 171 #ifdef TARGET_LIBC_PROVIDES_SSP
 172 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 173 #define TARGET_THREAD_SSP_OFFSET        0x14
 174 #endif
 175
 176 /* Define if long doubles should be mangled as 'g'.  */
 177 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 178
 179 /* We use glibc _mcount for profiling.  */
 180 #undef NO_PROFILE_COUNTERS
 181 #define NO_PROFILE_COUNTERS     1