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
   3    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 2, 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 COPYING.  If not, write to
  20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.  */
  22
  23 #define TARGET_OS_CPP_BUILTINS()                \
  24   do                                            \
  25     {                                           \
  26       builtin_define_std ("unix");              \
  27       builtin_define_std ("linux");             \
  28       builtin_define ("__gnu_linux__");         \
  29       builtin_assert ("system=linux");          \
  30       builtin_assert ("system=unix");           \
  31       builtin_assert ("system=posix");          \
  32       if (TARGET_LONG_DOUBLE_128)               \
  33         builtin_define ("__LONG_DOUBLE_128__"); \
  34     }                                           \
  35   while (0)
  36
  37 /* Don't assume anything about the header files.  */
  38 #define NO_IMPLICIT_EXTERN_C
  39
  40 #undef MD_EXEC_PREFIX
  41 #undef MD_STARTFILE_PREFIX
  42
  43 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  44    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  45    provides part of the support for getting C++ file-scope static
  46    object constructed before entering `main'.  */
  47
  48 #undef  STARTFILE_SPEC
  49 #if defined HAVE_LD_PIE
  50 #define STARTFILE_SPEC \
  51   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  52    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  53 #else
  54 #define STARTFILE_SPEC \
  55   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  56    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  57 #endif
  58
  59 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  60    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  61    provides part of the support for getting C++ file-scope static
  62    object constructed before entering `main', followed by a normal
  63    GNU/Linux "finalizer" file, `crtn.o'.  */
  64
  65 #undef  ENDFILE_SPEC
  66 #define ENDFILE_SPEC \
  67   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  68    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  69
  70 /* This is for -profile to use -lc_p instead of -lc.  */
  71 #undef  CC1_SPEC
  72 #define CC1_SPEC "%{profile:-p} \
  73 %{sun4:} %{target:} \
  74 %{mcypress:-mcpu=cypress} \
  75 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  76 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  77 "
  78
  79 /* The GNU C++ standard library requires that these macros be defined.  */
  80 #undef CPLUSPLUS_CPP_SPEC
  81 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  82
  83 #undef TARGET_VERSION
  84 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  85
  86 #undef SIZE_TYPE
  87 #define SIZE_TYPE "unsigned int"
  88
  89 #undef PTRDIFF_TYPE
  90 #define PTRDIFF_TYPE "int"
  91
  92 #undef WCHAR_TYPE
  93 #define WCHAR_TYPE "int"
  94
  95 #undef WCHAR_TYPE_SIZE
  96 #define WCHAR_TYPE_SIZE 32
  97
  98 #undef CPP_SUBTARGET_SPEC
  99 #define CPP_SUBTARGET_SPEC \
 100 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 101
 102 #undef LIB_SPEC
 103 #define LIB_SPEC \
 104   "%{pthread:-lpthread} \
 105    %{shared:-lc} \
 106    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 107
 108 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 109    for the special GCC options -static and -shared, which allow us to
 110    link things in one of these three modes by applying the appropriate
 111    combinations of options at link-time. We like to support here for
 112    as many of the other GNU linker options as possible. But I don't
 113    have the time to search for those flags. I am sure how to add
 114    support for -soname shared_object_name. H.J.
 115
 116    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 117    -Wl,-V.
 118
 119    When the -shared link option is used a final link is not being
 120    done.  */
 121
 122 /* If ELF is the default format, we should not use /lib/elf.  */
 123
 124 #undef  LINK_SPEC
 125 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 126   %{!mno-relax:%{!r:-relax}} \
 127   %{!shared: \
 128     %{!ibcs: \
 129       %{!static: \
 130         %{rdynamic:-export-dynamic} \
 131         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 132         %{static:-static}}}"
 133
 134 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 135    It's safe to pass -s always, even if -g is not used.  */
 136 #undef ASM_SPEC
 137 #define ASM_SPEC \
 138   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 139    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 140
 141 /* Same as sparc.h */
 142 #undef DBX_REGISTER_NUMBER
 143 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 144
 145 #undef ASM_OUTPUT_ALIGNED_LOCAL
 146 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 147 do {                                                                    \
 148   fputs ("\t.local\t", (FILE));         \
 149   assemble_name ((FILE), (NAME));                                       \
 150   putc ('\n', (FILE));                                                  \
 151   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 152 } while (0)
 153
 154 #undef COMMON_ASM_OP
 155 #define COMMON_ASM_OP "\t.common\t"
 156
 157 #undef  LOCAL_LABEL_PREFIX
 158 #define LOCAL_LABEL_PREFIX  "."
 159
 160 /* This is how to store into the string LABEL
 161    the symbol_ref name of an internal numbered label where
 162    PREFIX is the class of label and NUM is the number within the class.
 163    This is suitable for output with `assemble_name'.  */
 164
 165 #undef  ASM_GENERATE_INTERNAL_LABEL
 166 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 167   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 168
 169 \f
 170 /* Define for support of TFmode long double.
 171    SPARC ABI says that long double is 4 words.  */
 172 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 173
 174 /* Define this to set long double type size to use in libgcc2.c, which can
 175    not depend on target_flags.  */
 176 #ifdef __LONG_DOUBLE_128__
 177 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 178 #else
 179 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 180 #endif
 181
 182 #undef DITF_CONVERSION_LIBFUNCS
 183 #define DITF_CONVERSION_LIBFUNCS 1
 184
 185 #if defined(HAVE_LD_EH_FRAME_HDR)
 186 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 187 #endif
 188 \f
 189 #ifdef HAVE_AS_TLS
 190 #undef TARGET_SUN_TLS
 191 #undef TARGET_GNU_TLS
 192 #define TARGET_SUN_TLS 0
 193 #define TARGET_GNU_TLS 1
 194 #endif
 195 \f
 196 /* Don't be different from other Linux platforms in this regard.  */
 197 #define HANDLE_PRAGMA_PACK_PUSH_POP
 198
 199 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 200 #undef CTORS_SECTION_ASM_OP
 201 #undef DTORS_SECTION_ASM_OP
 202
 203 /* Determine whether the entire c99 runtime is present in the
 204    runtime library.  */
 205 #define TARGET_C99_FUNCTIONS 1
 206
 207 #define TARGET_POSIX_IO
 208
 209 #undef LINK_GCC_C_SEQUENCE_SPEC
 210 #define LINK_GCC_C_SEQUENCE_SPEC \
 211   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 212
 213 /* Use --as-needed -lgcc_s for eh support.  */
 214 #ifdef HAVE_LD_AS_NEEDED
 215 #define USE_LD_AS_NEEDED 1
 216 #endif
 217
 218 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 219
 220 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 221    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 222    change their minds.  */
 223 #undef SPARC_RELAXED_ORDERING
 224 #define SPARC_RELAXED_ORDERING true
 225
 226 #undef NEED_INDICATE_EXEC_STACK
 227 #define NEED_INDICATE_EXEC_STACK 1
 228
 229 #ifdef TARGET_LIBC_PROVIDES_SSP
 230 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 231 #define TARGET_THREAD_SSP_OFFSET        0x14
 232 #endif
 233
 234 /* Define if long doubles should be mangled as 'g'.  */
 235 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING