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       builtin_define_std ("unix");              \
  26       builtin_define_std ("linux");             \
  27       builtin_define ("__gnu_linux__");         \
  28       builtin_assert ("system=linux");          \
  29       builtin_assert ("system=unix");           \
  30       builtin_assert ("system=posix");          \
  31       if (TARGET_LONG_DOUBLE_128)               \
  32         builtin_define ("__LONG_DOUBLE_128__"); \
  33     }                                           \
  34   while (0)
  35
  36 /* Don't assume anything about the header files.  */
  37 #define NO_IMPLICIT_EXTERN_C
  38
  39 #undef MD_EXEC_PREFIX
  40 #undef MD_STARTFILE_PREFIX
  41
  42 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  43    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  44    provides part of the support for getting C++ file-scope static
  45    object constructed before entering `main'.  */
  46
  47 #undef  STARTFILE_SPEC
  48 #if defined HAVE_LD_PIE
  49 #define STARTFILE_SPEC \
  50   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  51    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  52 #else
  53 #define STARTFILE_SPEC \
  54   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  55    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  56 #endif
  57
  58 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  59    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  60    provides part of the support for getting C++ file-scope static
  61    object constructed before entering `main', followed by a normal
  62    GNU/Linux "finalizer" file, `crtn.o'.  */
  63
  64 #undef  ENDFILE_SPEC
  65 #define ENDFILE_SPEC \
  66   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  67    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  68
  69 /* This is for -profile to use -lc_p instead of -lc.  */
  70 #undef  CC1_SPEC
  71 #define CC1_SPEC "%{profile:-p} \
  72 %{sun4:} %{target:} \
  73 %{mcypress:-mcpu=cypress} \
  74 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  75 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  76 "
  77
  78 /* The GNU C++ standard library requires that these macros be defined.  */
  79 #undef CPLUSPLUS_CPP_SPEC
  80 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  81
  82 #undef TARGET_VERSION
  83 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  84
  85 #undef SIZE_TYPE
  86 #define SIZE_TYPE "unsigned int"
  87
  88 #undef PTRDIFF_TYPE
  89 #define PTRDIFF_TYPE "int"
  90
  91 #undef WCHAR_TYPE
  92 #define WCHAR_TYPE "int"
  93
  94 #undef WCHAR_TYPE_SIZE
  95 #define WCHAR_TYPE_SIZE 32
  96
  97 #undef CPP_SUBTARGET_SPEC
  98 #define CPP_SUBTARGET_SPEC \
  99 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 100
 101 #undef LIB_SPEC
 102 #define LIB_SPEC \
 103   "%{pthread:-lpthread} \
 104    %{shared:-lc} \
 105    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 106
 107 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 108    for the special GCC options -static and -shared, which allow us to
 109    link things in one of these three modes by applying the appropriate
 110    combinations of options at link-time. We like to support here for
 111    as many of the other GNU linker options as possible. But I don't
 112    have the time to search for those flags. I am sure how to add
 113    support for -soname shared_object_name. H.J.
 114
 115    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 116    -Wl,-V.
 117
 118    When the -shared link option is used a final link is not being
 119    done.  */
 120
 121 /* If ELF is the default format, we should not use /lib/elf.  */
 122
 123 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
 124 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
 125 #if UCLIBC_DEFAULT
 126 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}"
 127 #else
 128 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}"
 129 #endif
 130 #define LINUX_DYNAMIC_LINKER \
 131   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER)
 132
 133
 134 #undef  LINK_SPEC
 135 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 136   %{!mno-relax:%{!r:-relax}} \
 137   %{!shared: \
 138     %{!ibcs: \
 139       %{!static: \
 140         %{rdynamic:-export-dynamic} \
 141         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
 142         %{static:-static}}}"
 143
 144 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 145    It's safe to pass -s always, even if -g is not used.  */
 146 #undef ASM_SPEC
 147 #define ASM_SPEC \
 148   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 149    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 150
 151 /* Same as sparc.h */
 152 #undef DBX_REGISTER_NUMBER
 153 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 154
 155 #undef ASM_OUTPUT_ALIGNED_LOCAL
 156 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 157 do {                                                                    \
 158   fputs ("\t.local\t", (FILE));         \
 159   assemble_name ((FILE), (NAME));                                       \
 160   putc ('\n', (FILE));                                                  \
 161   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 162 } while (0)
 163
 164 #undef COMMON_ASM_OP
 165 #define COMMON_ASM_OP "\t.common\t"
 166
 167 #undef  LOCAL_LABEL_PREFIX
 168 #define LOCAL_LABEL_PREFIX  "."
 169
 170 /* This is how to store into the string LABEL
 171    the symbol_ref name of an internal numbered label where
 172    PREFIX is the class of label and NUM is the number within the class.
 173    This is suitable for output with `assemble_name'.  */
 174
 175 #undef  ASM_GENERATE_INTERNAL_LABEL
 176 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 177   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 178
 179 \f
 180 /* Define for support of TFmode long double.
 181    SPARC ABI says that long double is 4 words.  */
 182 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 183
 184 /* Define this to set long double type size to use in libgcc2.c, which can
 185    not depend on target_flags.  */
 186 #ifdef __LONG_DOUBLE_128__
 187 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 188 #else
 189 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 190 #endif
 191
 192 #undef DITF_CONVERSION_LIBFUNCS
 193 #define DITF_CONVERSION_LIBFUNCS 1
 194
 195 #if defined(HAVE_LD_EH_FRAME_HDR)
 196 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 197 #endif
 198 \f
 199 #ifdef HAVE_AS_TLS
 200 #undef TARGET_SUN_TLS
 201 #undef TARGET_GNU_TLS
 202 #define TARGET_SUN_TLS 0
 203 #define TARGET_GNU_TLS 1
 204 #endif
 205 \f
 206 /* Don't be different from other Linux platforms in this regard.  */
 207 #define HANDLE_PRAGMA_PACK_PUSH_POP
 208
 209 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 210 #undef CTORS_SECTION_ASM_OP
 211 #undef DTORS_SECTION_ASM_OP
 212
 213 /* Determine whether the entire c99 runtime is present in the
 214    runtime library.  */
 215 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
 216
 217 /* Whether we have sincos that follows the GNU extension.  */
 218 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
 219
 220 #define TARGET_POSIX_IO
 221
 222 #undef LINK_GCC_C_SEQUENCE_SPEC
 223 #define LINK_GCC_C_SEQUENCE_SPEC \
 224   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 225
 226 /* Use --as-needed -lgcc_s for eh support.  */
 227 #ifdef HAVE_LD_AS_NEEDED
 228 #define USE_LD_AS_NEEDED 1
 229 #endif
 230
 231 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 232
 233 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 234    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 235    change their minds.  */
 236 #undef SPARC_RELAXED_ORDERING
 237 #define SPARC_RELAXED_ORDERING true
 238
 239 #undef NEED_INDICATE_EXEC_STACK
 240 #define NEED_INDICATE_EXEC_STACK 1
 241
 242 #ifdef TARGET_LIBC_PROVIDES_SSP
 243 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 244 #define TARGET_THREAD_SSP_OFFSET        0x14
 245 #endif
 246
 247 /* Define if long doubles should be mangled as 'g'.  */
 248 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING