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, 2008, 2009, 2010, 2011 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       GNU_USER_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    %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  41
  42 /* -mcpu=native handling only makes sense with compiler running on
  43    a SPARC chip.  */
  44 #if defined(__sparc__) && defined(__linux__)
  45 extern const char *host_detect_local_cpu (int argc, const char **argv);
  46 # define EXTRA_SPEC_FUNCTIONS                                           \
  47   { "local_cpu_detect", host_detect_local_cpu },
  48
  49 # define MCPU_MTUNE_NATIVE_SPECS                                        \
  50    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
  51    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
  52 #else
  53 # define MCPU_MTUNE_NATIVE_SPECS ""
  54 #endif
  55
  56 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
  57
  58 /* This is for -profile to use -lc_p instead of -lc.  */
  59 #undef  CC1_SPEC
  60 #define CC1_SPEC "%{profile:-p} \
  61 "
  62
  63 #undef SIZE_TYPE
  64 #define SIZE_TYPE "unsigned int"
  65
  66 #undef PTRDIFF_TYPE
  67 #define PTRDIFF_TYPE "int"
  68
  69 #undef WCHAR_TYPE
  70 #define WCHAR_TYPE "int"
  71
  72 #undef WCHAR_TYPE_SIZE
  73 #define WCHAR_TYPE_SIZE 32
  74
  75 #undef CPP_SUBTARGET_SPEC
  76 #define CPP_SUBTARGET_SPEC \
  77 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  78
  79 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  80    for the special GCC options -static and -shared, which allow us to
  81    link things in one of these three modes by applying the appropriate
  82    combinations of options at link-time.
  83
  84    When the -shared link option is used a final link is not being
  85    done.  */
  86
  87 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
  88
  89 #undef  LINK_SPEC
  90 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
  91   %{!mno-relax:%{!r:-relax}} \
  92   %{!shared: \
  93     %{!static: \
  94       %{rdynamic:-export-dynamic} \
  95       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  96       %{static:-static}}"
  97
  98 /* It's safe to pass -s always, even if -g is not used.  */
  99 #undef ASM_SPEC
 100 #define ASM_SPEC "\
 101 -s \
 102 %{fpic|fPIC|fpie|fPIE:-K PIC} \
 103 %{!.c:%{findirect-dispatch:-K PIC}} \
 104 %(asm_cpu) %(asm_relax)"
 105
 106 #undef ASM_OUTPUT_ALIGNED_LOCAL
 107 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 108 do {                                                                    \
 109   fputs ("\t.local\t", (FILE));         \
 110   assemble_name ((FILE), (NAME));                                       \
 111   putc ('\n', (FILE));                                                  \
 112   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 113 } while (0)
 114
 115 #undef COMMON_ASM_OP
 116 #define COMMON_ASM_OP "\t.common\t"
 117
 118 #undef  LOCAL_LABEL_PREFIX
 119 #define LOCAL_LABEL_PREFIX  "."
 120
 121 /* This is how to store into the string LABEL
 122    the symbol_ref name of an internal numbered label where
 123    PREFIX is the class of label and NUM is the number within the class.
 124    This is suitable for output with `assemble_name'.  */
 125
 126 #undef  ASM_GENERATE_INTERNAL_LABEL
 127 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 128   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 129
 130 \f
 131 /* Define for support of TFmode long double.
 132    SPARC ABI says that long double is 4 words.  */
 133 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 134
 135 /* Define this to set long double type size to use in libgcc2.c, which can
 136    not depend on target_flags.  */
 137 #ifdef __LONG_DOUBLE_128__
 138 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 139 #else
 140 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 141 #endif
 142
 143 #undef DITF_CONVERSION_LIBFUNCS
 144 #define DITF_CONVERSION_LIBFUNCS 1
 145 \f
 146 #ifdef HAVE_AS_TLS
 147 #undef TARGET_SUN_TLS
 148 #undef TARGET_GNU_TLS
 149 #define TARGET_SUN_TLS 0
 150 #define TARGET_GNU_TLS 1
 151 #endif
 152 \f
 153 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 154 #undef CTORS_SECTION_ASM_OP
 155 #undef DTORS_SECTION_ASM_OP
 156
 157 /* Static stack checking is supported by means of probes.  */
 158 #define STACK_CHECK_STATIC_BUILTIN 1
 159
 160 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 161    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 162    change their minds.  */
 163 #undef SPARC_RELAXED_ORDERING
 164 #define SPARC_RELAXED_ORDERING true
 165
 166 #undef NEED_INDICATE_EXEC_STACK
 167 #define NEED_INDICATE_EXEC_STACK 1
 168
 169 #ifdef TARGET_LIBC_PROVIDES_SSP
 170 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 171 #define TARGET_THREAD_SSP_OFFSET        0x14
 172 #endif
 173
 174 /* Define if long doubles should be mangled as 'g'.  */
 175 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 176
 177 /* We use glibc _mcount for profiling.  */
 178 #undef NO_PROFILE_COUNTERS
 179 #define NO_PROFILE_COUNTERS     1