gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996-2015 Free Software Foundation, Inc.
   3    Contributed by Eddie C. Dost (ecd@skynet.be)
   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 #define TARGET_OS_CPP_BUILTINS()                \
  22   do                                            \
  23     {                                           \
  24       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  25       if (TARGET_LONG_DOUBLE_128)               \
  26         builtin_define ("__LONG_DOUBLE_128__"); \
  27     }                                           \
  28   while (0)
  29
  30 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  31    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  32    provides part of the support for getting C++ file-scope static
  33    object constructed before entering `main', followed by a normal
  34    GNU/Linux "finalizer" file, `crtn.o'.  */
  35
  36 #undef  ENDFILE_SPEC
  37 #define ENDFILE_SPEC \
  38   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  39    %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  40
  41 /* -mcpu=native handling only makes sense with compiler running on
  42    a SPARC chip.  */
  43 #if defined(__sparc__) && defined(__linux__)
  44 extern const char *host_detect_local_cpu (int argc, const char **argv);
  45 # define EXTRA_SPEC_FUNCTIONS                                           \
  46   { "local_cpu_detect", host_detect_local_cpu },
  47
  48 # define MCPU_MTUNE_NATIVE_SPECS                                        \
  49    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
  50    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
  51 #else
  52 # define MCPU_MTUNE_NATIVE_SPECS ""
  53 #endif
  54
  55 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
  56
  57 /* This is for -profile to use -lc_p instead of -lc.  */
  58 #undef  CC1_SPEC
  59 #define CC1_SPEC "%{profile:-p} \
  60 "
  61
  62 #undef SIZE_TYPE
  63 #define SIZE_TYPE "unsigned int"
  64
  65 #undef PTRDIFF_TYPE
  66 #define PTRDIFF_TYPE "int"
  67
  68 #undef WCHAR_TYPE
  69 #define WCHAR_TYPE "int"
  70
  71 #undef WCHAR_TYPE_SIZE
  72 #define WCHAR_TYPE_SIZE 32
  73
  74 #undef CPP_SUBTARGET_SPEC
  75 #define CPP_SUBTARGET_SPEC \
  76 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  77
  78 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  79    for the special GCC options -static and -shared, which allow us to
  80    link things in one of these three modes by applying the appropriate
  81    combinations of options at link-time.
  82
  83    When the -shared link option is used a final link is not being
  84    done.  */
  85
  86 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
  87
  88 #undef  LINK_SPEC
  89 #define LINK_SPEC "-m elf32_sparc %{shared:-shared} \
  90   %{!mno-relax:%{!r:-relax}} \
  91   %{!shared: \
  92     %{!static: \
  93       %{rdynamic:-export-dynamic} \
  94       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  95       %{static:-static}}"
  96
  97 /* It's safe to pass -s always, even if -g is not used.  */
  98 #undef ASM_SPEC
  99 #define ASM_SPEC "\
 100 -s \
 101 %{fpic|fPIC|fpie|fPIE:-K PIC} \
 102 %{!.c:%{findirect-dispatch:-K PIC}} \
 103 %(asm_cpu) %(asm_relax)"
 104
 105 #undef ASM_OUTPUT_ALIGNED_LOCAL
 106 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 107 do {                                                                    \
 108   fputs ("\t.local\t", (FILE));         \
 109   assemble_name ((FILE), (NAME));                                       \
 110   putc ('\n', (FILE));                                                  \
 111   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 112 } while (0)
 113
 114 #undef COMMON_ASM_OP
 115 #define COMMON_ASM_OP "\t.common\t"
 116
 117 #undef  LOCAL_LABEL_PREFIX
 118 #define LOCAL_LABEL_PREFIX  "."
 119
 120 \f
 121 /* Define for support of TFmode long double.
 122    SPARC ABI says that long double is 4 words.  */
 123 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 124
 125 #undef DITF_CONVERSION_LIBFUNCS
 126 #define DITF_CONVERSION_LIBFUNCS 1
 127 \f
 128 #ifdef HAVE_AS_TLS
 129 #undef TARGET_SUN_TLS
 130 #undef TARGET_GNU_TLS
 131 #define TARGET_SUN_TLS 0
 132 #define TARGET_GNU_TLS 1
 133 #endif
 134 \f
 135 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 136 #undef CTORS_SECTION_ASM_OP
 137 #undef DTORS_SECTION_ASM_OP
 138
 139 /* Static stack checking is supported by means of probes.  */
 140 #define STACK_CHECK_STATIC_BUILTIN 1
 141
 142 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 143    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 144    change their minds.  */
 145 #undef SPARC_RELAXED_ORDERING
 146 #define SPARC_RELAXED_ORDERING true
 147
 148 #undef NEED_INDICATE_EXEC_STACK
 149 #define NEED_INDICATE_EXEC_STACK 1
 150
 151 #ifdef TARGET_LIBC_PROVIDES_SSP
 152 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 153 #define TARGET_THREAD_SSP_OFFSET        0x14
 154 #endif
 155
 156 /* Define if long doubles should be mangled as 'g'.  */
 157 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 158
 159 /* We use glibc _mcount for profiling.  */
 160 #undef NO_PROFILE_COUNTERS
 161 #define NO_PROFILE_COUNTERS     1