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     }                                           \
  33   while (0)
  34
  35 /* Don't assume anything about the header files.  */
  36 #define NO_IMPLICIT_EXTERN_C
  37
  38 #undef MD_EXEC_PREFIX
  39 #undef MD_STARTFILE_PREFIX
  40
  41 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  42    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  43    provides part of the support for getting C++ file-scope static
  44    object constructed before entering `main'.  */
  45
  46 #undef  STARTFILE_SPEC
  47 #if defined HAVE_LD_PIE
  48 #define STARTFILE_SPEC \
  49   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  50    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  51 #else
  52 #define STARTFILE_SPEC \
  53   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  54    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  55 #endif
  56
  57 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  58    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  59    provides part of the support for getting C++ file-scope static
  60    object constructed before entering `main', followed by a normal
  61    GNU/Linux "finalizer" file, `crtn.o'.  */
  62
  63 #undef  ENDFILE_SPEC
  64 #define ENDFILE_SPEC \
  65   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  66    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  67
  68 /* This is for -profile to use -lc_p instead of -lc.  */
  69 #undef  CC1_SPEC
  70 #define CC1_SPEC "%{profile:-p} \
  71 %{sun4:} %{target:} \
  72 %{mcypress:-mcpu=cypress} \
  73 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  74 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  75 "
  76
  77 /* The GNU C++ standard library requires that these macros be defined.  */
  78 #undef CPLUSPLUS_CPP_SPEC
  79 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  80
  81 #undef TARGET_VERSION
  82 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  83
  84 #undef SIZE_TYPE
  85 #define SIZE_TYPE "unsigned int"
  86
  87 #undef PTRDIFF_TYPE
  88 #define PTRDIFF_TYPE "int"
  89
  90 #undef WCHAR_TYPE
  91 #define WCHAR_TYPE "int"
  92
  93 #undef WCHAR_TYPE_SIZE
  94 #define WCHAR_TYPE_SIZE 32
  95
  96 #undef CPP_SUBTARGET_SPEC
  97 #define CPP_SUBTARGET_SPEC \
  98 "%{posix:-D_POSIX_SOURCE} \
  99 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 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 #undef  LINK_SPEC
 124 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 125   %{!mno-relax:%{!r:-relax}} \
 126   %{!shared: \
 127     %{!ibcs: \
 128       %{!static: \
 129         %{rdynamic:-export-dynamic} \
 130         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 131         %{static:-static}}}"
 132
 133 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 134    It's safe to pass -s always, even if -g is not used.  */
 135 #undef ASM_SPEC
 136 #define ASM_SPEC \
 137   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 138    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 139
 140 /* Same as sparc.h */
 141 #undef DBX_REGISTER_NUMBER
 142 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 143
 144 #undef ASM_OUTPUT_ALIGNED_LOCAL
 145 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 146 do {                                                                    \
 147   fputs ("\t.local\t", (FILE));         \
 148   assemble_name ((FILE), (NAME));                                       \
 149   putc ('\n', (FILE));                                                  \
 150   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 151 } while (0)
 152
 153 #undef COMMON_ASM_OP
 154 #define COMMON_ASM_OP "\t.common\t"
 155
 156 #undef  LOCAL_LABEL_PREFIX
 157 #define LOCAL_LABEL_PREFIX  "."
 158
 159 /* This is how to store into the string LABEL
 160    the symbol_ref name of an internal numbered label where
 161    PREFIX is the class of label and NUM is the number within the class.
 162    This is suitable for output with `assemble_name'.  */
 163
 164 #undef  ASM_GENERATE_INTERNAL_LABEL
 165 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 166   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 167
 168 \f
 169 /* Define for support of TFmode long double.
 170    SPARC ABI says that long double is 4 words.  */
 171 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 172
 173 /* Define this to set long double type size to use in libgcc2.c, which can
 174    not depend on target_flags.  */
 175 #ifdef __LONG_DOUBLE_128__
 176 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 177 #else
 178 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 179 #endif
 180
 181 #undef DITF_CONVERSION_LIBFUNCS
 182 #define DITF_CONVERSION_LIBFUNCS 1
 183
 184 #if defined(HAVE_LD_EH_FRAME_HDR)
 185 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 186 #endif
 187 \f
 188 #ifdef HAVE_AS_TLS
 189 #undef TARGET_SUN_TLS
 190 #undef TARGET_GNU_TLS
 191 #define TARGET_SUN_TLS 0
 192 #define TARGET_GNU_TLS 1
 193 #endif
 194 \f
 195 /* Don't be different from other Linux platforms in this regard.  */
 196 #define HANDLE_PRAGMA_PACK_PUSH_POP
 197
 198 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 199 #undef CTORS_SECTION_ASM_OP
 200 #undef DTORS_SECTION_ASM_OP
 201
 202 /* Determine whether the entire c99 runtime is present in the
 203    runtime library.  */
 204 #define TARGET_C99_FUNCTIONS 1
 205
 206 #define TARGET_POSIX_IO
 207
 208 #undef LINK_GCC_C_SEQUENCE_SPEC
 209 #define LINK_GCC_C_SEQUENCE_SPEC \
 210   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 211
 212 /* Use --as-needed -lgcc_s for eh support.  */
 213 #ifdef HAVE_LD_AS_NEEDED
 214 #define USE_LD_AS_NEEDED 1
 215 #endif
 216
 217 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 218
 219 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 220    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 221    change their minds.  */
 222 #undef SPARC_RELAXED_ORDERING
 223 #define SPARC_RELAXED_ORDERING true
 224
 225 #undef NEED_INDICATE_EXEC_STACK
 226 #define NEED_INDICATE_EXEC_STACK 1
 227
 228 #ifdef TARGET_LIBC_PROVIDES_SSP
 229 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 230 #define TARGET_THREAD_SSP_OFFSET        0x14
 231 #endif