gcc/config/sparc/linux64.h

   1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
   2    Copyright 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005
   3    Free Software Foundation, Inc.
   4    Contributed by David S. Miller (davem@caip.rutgers.edu)
   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 ("_LONGLONG");           \
  29         builtin_define ("__gnu_linux__");       \
  30         builtin_assert ("system=linux");        \
  31         builtin_assert ("system=unix");         \
  32         builtin_assert ("system=posix");        \
  33         if (flag_pic)                           \
  34           {                                     \
  35                 builtin_define ("__PIC__");     \
  36                 builtin_define ("__pic__");     \
  37           }                                     \
  38     }                                           \
  39   while (0)
  40
  41 /* Don't assume anything about the header files.  */
  42 #define NO_IMPLICIT_EXTERN_C
  43
  44 #undef MD_EXEC_PREFIX
  45 #undef MD_STARTFILE_PREFIX
  46
  47 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 \
  48     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc \
  49     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc3
  50 /* A 64 bit v9 compiler with stack-bias,
  51    in a Medium/Low code model environment.  */
  52
  53 #undef TARGET_DEFAULT
  54 #define TARGET_DEFAULT \
  55   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  56    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  57 #endif
  58
  59 #undef ASM_CPU_DEFAULT_SPEC
  60 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  61
  62 #ifdef SPARC_BI_ARCH
  63
  64 #undef CPP_ARCH32_SPEC
  65 #define CPP_ARCH32_SPEC "%{mlong-double-128:-D__LONG_DOUBLE_128__}"
  66
  67 #endif
  68
  69 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  70    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  71    provides part of the support for getting C++ file-scope static
  72    object constructed before entering `main'.  */
  73
  74 #undef  STARTFILE_SPEC
  75
  76 #ifdef HAVE_LD_PIE
  77 #define STARTFILE_SPEC \
  78   "%{!shared:%{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  79    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  80 #else
  81 #define STARTFILE_SPEC \
  82   "%{!shared:%{pg|p:gcrt1.o%s;:crt1.o%s}}\
  83    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  84 #endif
  85
  86 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  87    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  88    provides part of the support for getting C++ file-scope static
  89    object constructed before entering `main', followed by a normal
  90    GNU/Linux "finalizer" file, `crtn.o'.  */
  91
  92 #undef  ENDFILE_SPEC
  93
  94 #define ENDFILE_SPEC \
  95   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  96    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  97
  98 /* The GNU C++ standard library requires that these macros be defined.  */
  99 #undef CPLUSPLUS_CPP_SPEC
 100 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
 101
 102 #undef TARGET_VERSION
 103 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
 104
 105 /* The default code model.  */
 106 #undef SPARC_DEFAULT_CMODEL
 107 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
 108
 109 #undef WCHAR_TYPE
 110 #define WCHAR_TYPE "int"
 111
 112 #undef WCHAR_TYPE_SIZE
 113 #define WCHAR_TYPE_SIZE 32
 114
 115 /* Define for support of TFmode long double.
 116    SPARC ABI says that long double is 4 words.  */
 117 #undef LONG_DOUBLE_TYPE_SIZE
 118 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 119
 120 /* Define this to set long double type size to use in libgcc2.c, which can
 121    not depend on target_flags.  */
 122 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 123 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 124 #else
 125 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 126 #endif
 127
 128 #undef CPP_SUBTARGET_SPEC
 129 #define CPP_SUBTARGET_SPEC "\
 130 %{posix:-D_POSIX_SOURCE} \
 131 %{pthread:-D_REENTRANT} \
 132 "
 133
 134 #undef LIB_SPEC
 135 #define LIB_SPEC \
 136   "%{pthread:-lpthread} \
 137    %{shared:-lc} \
 138    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 139
 140 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 141    for the special GCC options -static and -shared, which allow us to
 142    link things in one of these three modes by applying the appropriate
 143    combinations of options at link-time. We like to support here for
 144    as many of the other GNU linker options as possible. But I don't
 145    have the time to search for those flags. I am sure how to add
 146    support for -soname shared_object_name. H.J.
 147
 148    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 149    -Wl,-V.
 150
 151    When the -shared link option is used a final link is not being
 152    done.  */
 153
 154 /* If ELF is the default format, we should not use /lib/elf.  */
 155
 156 #ifdef SPARC_BI_ARCH
 157
 158 #undef SUBTARGET_EXTRA_SPECS
 159 #define SUBTARGET_EXTRA_SPECS \
 160   { "link_arch32",       LINK_ARCH32_SPEC },              \
 161   { "link_arch64",       LINK_ARCH64_SPEC },              \
 162   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 163   { "link_arch",         LINK_ARCH_SPEC },
 164
 165 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 166   %{!shared: \
 167     %{!ibcs: \
 168       %{!static: \
 169         %{rdynamic:-export-dynamic} \
 170         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 171         %{static:-static}}} \
 172 "
 173
 174 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 175   %{!shared: \
 176     %{!ibcs: \
 177       %{!static: \
 178         %{rdynamic:-export-dynamic} \
 179         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 180         %{static:-static}}} \
 181 "
 182
 183 #define LINK_ARCH_SPEC "\
 184 %{m32:%(link_arch32)} \
 185 %{m64:%(link_arch64)} \
 186 %{!m32:%{!m64:%(link_arch_default)}} \
 187 "
 188
 189 #define LINK_ARCH_DEFAULT_SPEC \
 190 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 191
 192 #undef  LINK_SPEC
 193 #define LINK_SPEC "\
 194 %(link_arch) \
 195 %{mlittle-endian:-EL} \
 196 %{!mno-relax:%{!r:-relax}} \
 197 "
 198
 199 #undef  CC1_SPEC
 200 #if DEFAULT_ARCH32_P
 201 #define CC1_SPEC "\
 202 %{sun4:} %{target:} \
 203 %{mcypress:-mcpu=cypress} \
 204 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 205 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 206 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 207 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 208   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 209   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 210 "
 211 #else
 212 #define CC1_SPEC "\
 213 %{sun4:} %{target:} \
 214 %{mcypress:-mcpu=cypress} \
 215 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 216 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 217 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 218 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 219   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 220 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 221 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 222 "
 223 #endif
 224
 225 /* Support for a compile-time default CPU, et cetera.  The rules are:
 226    --with-cpu is ignored if -mcpu is specified.
 227    --with-tune is ignored if -mtune is specified.
 228    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 229      are specified.
 230    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 231    here, otherwise say -mcpu=v7 would be passed even when -m64.
 232    CC1_SPEC above takes care of this instead.  */
 233 #undef OPTION_DEFAULT_SPECS
 234 #if DEFAULT_ARCH32_P
 235 #define OPTION_DEFAULT_SPECS \
 236   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 237   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 238   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 239 #else
 240 #define OPTION_DEFAULT_SPECS \
 241   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 242   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 243   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 244 #endif
 245
 246 #if DEFAULT_ARCH32_P
 247 #define MULTILIB_DEFAULTS { "m32" }
 248 #else
 249 #define MULTILIB_DEFAULTS { "m64" }
 250 #endif
 251
 252 #else /* !SPARC_BI_ARCH */
 253
 254 #undef LINK_SPEC
 255 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 256   %{!shared: \
 257     %{!ibcs: \
 258       %{!static: \
 259         %{rdynamic:-export-dynamic} \
 260         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 261         %{static:-static}}} \
 262 %{mlittle-endian:-EL} \
 263 %{!mno-relax:%{!r:-relax}} \
 264 "
 265
 266 #endif /* !SPARC_BI_ARCH */
 267
 268 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 269    It's safe to pass -s always, even if -g is not used.  */
 270 #undef ASM_SPEC
 271 #define ASM_SPEC "\
 272 %{V} \
 273 %{v:%{!V:-V}} \
 274 %{!Qn:-Qy} \
 275 %{n} \
 276 %{T} \
 277 %{Ym,*} \
 278 %{Wa,*:%*} \
 279 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 280 %{mlittle-endian:-EL} \
 281 %(asm_cpu) %(asm_arch) %(asm_relax)"
 282
 283 /* Same as sparc.h */
 284 #undef DBX_REGISTER_NUMBER
 285 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 286
 287 #undef ASM_OUTPUT_ALIGNED_LOCAL
 288 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 289 do {                                                                    \
 290   fputs ("\t.local\t", (FILE));         \
 291   assemble_name ((FILE), (NAME));                                       \
 292   putc ('\n', (FILE));                                                  \
 293   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 294 } while (0)
 295
 296 #undef COMMON_ASM_OP
 297 #define COMMON_ASM_OP "\t.common\t"
 298
 299 #undef  LOCAL_LABEL_PREFIX
 300 #define LOCAL_LABEL_PREFIX  "."
 301
 302 /* This is how to store into the string LABEL
 303    the symbol_ref name of an internal numbered label where
 304    PREFIX is the class of label and NUM is the number within the class.
 305    This is suitable for output with `assemble_name'.  */
 306
 307 #undef  ASM_GENERATE_INTERNAL_LABEL
 308 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 309   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 310
 311 /* DWARF bits.  */
 312
 313 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 314    Obviously the Dwarf2 folks haven't tried to actually build systems
 315    with their spec.  On a 64-bit system, only 64-bit relocs become
 316    RELATIVE relocations.  */
 317
 318 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 319
 320 #undef DITF_CONVERSION_LIBFUNCS
 321 #define DITF_CONVERSION_LIBFUNCS 1
 322
 323 #if defined(HAVE_LD_EH_FRAME_HDR)
 324 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 325 #endif
 326 \f
 327 #ifdef HAVE_AS_TLS
 328 #undef TARGET_SUN_TLS
 329 #undef TARGET_GNU_TLS
 330 #define TARGET_SUN_TLS 0
 331 #define TARGET_GNU_TLS 1
 332 #endif
 333 \f
 334 /* Don't be different from other Linux platforms in this regard.  */
 335 #define HANDLE_PRAGMA_PACK_PUSH_POP
 336
 337 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 338 #undef CTORS_SECTION_ASM_OP
 339 #undef DTORS_SECTION_ASM_OP
 340
 341 /* Determine whether the the entire c99 runtime is present in the
 342    runtime library.  */
 343 #define TARGET_C99_FUNCTIONS 1
 344
 345 #define TARGET_HAS_F_SETLKW
 346
 347 #undef LINK_GCC_C_SEQUENCE_SPEC
 348 #define LINK_GCC_C_SEQUENCE_SPEC \
 349   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 350
 351 /* Use --as-needed -lgcc_s for eh support.  */
 352 #ifdef HAVE_LD_AS_NEEDED
 353 #define USE_LD_AS_NEEDED 1
 354 #endif
 355
 356 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 357
 358 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 359    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 360    change their minds.  */
 361 #undef SPARC_RELAXED_ORDERING
 362 #define SPARC_RELAXED_ORDERING true
 363
 364 #undef NEED_INDICATE_EXEC_STACK
 365 #define NEED_INDICATE_EXEC_STACK 1