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     }                                           \
  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 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 \
  43     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc \
  44     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc3
  45 /* A 64 bit v9 compiler with stack-bias,
  46    in a Medium/Low code model environment.  */
  47
  48 #undef TARGET_DEFAULT
  49 #define TARGET_DEFAULT \
  50   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  51    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  52 #endif
  53
  54 #undef ASM_CPU_DEFAULT_SPEC
  55 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  56
  57 #ifdef SPARC_BI_ARCH
  58
  59 #undef CPP_ARCH32_SPEC
  60 #define CPP_ARCH32_SPEC "%{mlong-double-128:-D__LONG_DOUBLE_128__}"
  61
  62 #endif
  63
  64 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  65    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  66    provides part of the support for getting C++ file-scope static
  67    object constructed before entering `main'.  */
  68
  69 #undef  STARTFILE_SPEC
  70
  71 #ifdef HAVE_LD_PIE
  72 #define STARTFILE_SPEC \
  73   "%{!shared:%{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  74    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  75 #else
  76 #define STARTFILE_SPEC \
  77   "%{!shared:%{pg|p:gcrt1.o%s;:crt1.o%s}}\
  78    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  79 #endif
  80
  81 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  82    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  83    provides part of the support for getting C++ file-scope static
  84    object constructed before entering `main', followed by a normal
  85    GNU/Linux "finalizer" file, `crtn.o'.  */
  86
  87 #undef  ENDFILE_SPEC
  88
  89 #define ENDFILE_SPEC \
  90   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  91    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  92
  93 /* The GNU C++ standard library requires that these macros be defined.  */
  94 #undef CPLUSPLUS_CPP_SPEC
  95 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  96
  97 #undef TARGET_VERSION
  98 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  99
 100 /* The default code model.  */
 101 #undef SPARC_DEFAULT_CMODEL
 102 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
 103
 104 #undef WCHAR_TYPE
 105 #define WCHAR_TYPE "int"
 106
 107 #undef WCHAR_TYPE_SIZE
 108 #define WCHAR_TYPE_SIZE 32
 109
 110 /* Define for support of TFmode long double.
 111    SPARC ABI says that long double is 4 words.  */
 112 #undef LONG_DOUBLE_TYPE_SIZE
 113 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 114
 115 /* Define this to set long double type size to use in libgcc2.c, which can
 116    not depend on target_flags.  */
 117 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 118 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 119 #else
 120 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 121 #endif
 122
 123 #undef CPP_SUBTARGET_SPEC
 124 #define CPP_SUBTARGET_SPEC "\
 125 %{posix:-D_POSIX_SOURCE} \
 126 %{pthread:-D_REENTRANT} \
 127 "
 128
 129 #undef LIB_SPEC
 130 #define LIB_SPEC \
 131   "%{pthread:-lpthread} \
 132    %{shared:-lc} \
 133    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 134
 135 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 136    for the special GCC options -static and -shared, which allow us to
 137    link things in one of these three modes by applying the appropriate
 138    combinations of options at link-time. We like to support here for
 139    as many of the other GNU linker options as possible. But I don't
 140    have the time to search for those flags. I am sure how to add
 141    support for -soname shared_object_name. H.J.
 142
 143    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 144    -Wl,-V.
 145
 146    When the -shared link option is used a final link is not being
 147    done.  */
 148
 149 /* If ELF is the default format, we should not use /lib/elf.  */
 150
 151 #ifdef SPARC_BI_ARCH
 152
 153 #undef SUBTARGET_EXTRA_SPECS
 154 #define SUBTARGET_EXTRA_SPECS \
 155   { "link_arch32",       LINK_ARCH32_SPEC },              \
 156   { "link_arch64",       LINK_ARCH64_SPEC },              \
 157   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 158   { "link_arch",         LINK_ARCH_SPEC },
 159
 160 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 161   %{!shared: \
 162     %{!ibcs: \
 163       %{!static: \
 164         %{rdynamic:-export-dynamic} \
 165         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 166         %{static:-static}}} \
 167 "
 168
 169 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 170   %{!shared: \
 171     %{!ibcs: \
 172       %{!static: \
 173         %{rdynamic:-export-dynamic} \
 174         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 175         %{static:-static}}} \
 176 "
 177
 178 #define LINK_ARCH_SPEC "\
 179 %{m32:%(link_arch32)} \
 180 %{m64:%(link_arch64)} \
 181 %{!m32:%{!m64:%(link_arch_default)}} \
 182 "
 183
 184 #define LINK_ARCH_DEFAULT_SPEC \
 185 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 186
 187 #undef  LINK_SPEC
 188 #define LINK_SPEC "\
 189 %(link_arch) \
 190 %{mlittle-endian:-EL} \
 191 %{!mno-relax:%{!r:-relax}} \
 192 "
 193
 194 #undef  CC1_SPEC
 195 #if DEFAULT_ARCH32_P
 196 #define CC1_SPEC "\
 197 %{sun4:} %{target:} \
 198 %{mcypress:-mcpu=cypress} \
 199 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 200 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 201 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 202 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 203   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 204   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 205 "
 206 #else
 207 #define CC1_SPEC "\
 208 %{sun4:} %{target:} \
 209 %{mcypress:-mcpu=cypress} \
 210 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 211 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 212 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 213 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 214   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 215 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 216 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 217 "
 218 #endif
 219
 220 /* Support for a compile-time default CPU, et cetera.  The rules are:
 221    --with-cpu is ignored if -mcpu is specified.
 222    --with-tune is ignored if -mtune is specified.
 223    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 224      are specified.
 225    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 226    here, otherwise say -mcpu=v7 would be passed even when -m64.
 227    CC1_SPEC above takes care of this instead.  */
 228 #undef OPTION_DEFAULT_SPECS
 229 #if DEFAULT_ARCH32_P
 230 #define OPTION_DEFAULT_SPECS \
 231   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 232   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 233   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 234 #else
 235 #define OPTION_DEFAULT_SPECS \
 236   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 237   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 238   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 239 #endif
 240
 241 #if DEFAULT_ARCH32_P
 242 #define MULTILIB_DEFAULTS { "m32" }
 243 #else
 244 #define MULTILIB_DEFAULTS { "m64" }
 245 #endif
 246
 247 #else /* !SPARC_BI_ARCH */
 248
 249 #undef LINK_SPEC
 250 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 251   %{!shared: \
 252     %{!ibcs: \
 253       %{!static: \
 254         %{rdynamic:-export-dynamic} \
 255         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 256         %{static:-static}}} \
 257 %{mlittle-endian:-EL} \
 258 %{!mno-relax:%{!r:-relax}} \
 259 "
 260
 261 #endif /* !SPARC_BI_ARCH */
 262
 263 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 264    It's safe to pass -s always, even if -g is not used.  */
 265 #undef ASM_SPEC
 266 #define ASM_SPEC "\
 267 %{V} \
 268 %{v:%{!V:-V}} \
 269 %{!Qn:-Qy} \
 270 %{n} \
 271 %{T} \
 272 %{Ym,*} \
 273 %{Wa,*:%*} \
 274 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 275 %{mlittle-endian:-EL} \
 276 %(asm_cpu) %(asm_arch) %(asm_relax)"
 277
 278 /* Same as sparc.h */
 279 #undef DBX_REGISTER_NUMBER
 280 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 281
 282 #undef ASM_OUTPUT_ALIGNED_LOCAL
 283 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 284 do {                                                                    \
 285   fputs ("\t.local\t", (FILE));         \
 286   assemble_name ((FILE), (NAME));                                       \
 287   putc ('\n', (FILE));                                                  \
 288   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 289 } while (0)
 290
 291 #undef COMMON_ASM_OP
 292 #define COMMON_ASM_OP "\t.common\t"
 293
 294 #undef  LOCAL_LABEL_PREFIX
 295 #define LOCAL_LABEL_PREFIX  "."
 296
 297 /* This is how to store into the string LABEL
 298    the symbol_ref name of an internal numbered label where
 299    PREFIX is the class of label and NUM is the number within the class.
 300    This is suitable for output with `assemble_name'.  */
 301
 302 #undef  ASM_GENERATE_INTERNAL_LABEL
 303 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 304   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 305
 306 /* DWARF bits.  */
 307
 308 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 309    Obviously the Dwarf2 folks haven't tried to actually build systems
 310    with their spec.  On a 64-bit system, only 64-bit relocs become
 311    RELATIVE relocations.  */
 312
 313 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 314
 315 #undef DITF_CONVERSION_LIBFUNCS
 316 #define DITF_CONVERSION_LIBFUNCS 1
 317
 318 #if defined(HAVE_LD_EH_FRAME_HDR)
 319 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 320 #endif
 321 \f
 322 #ifdef HAVE_AS_TLS
 323 #undef TARGET_SUN_TLS
 324 #undef TARGET_GNU_TLS
 325 #define TARGET_SUN_TLS 0
 326 #define TARGET_GNU_TLS 1
 327 #endif
 328 \f
 329 /* Don't be different from other Linux platforms in this regard.  */
 330 #define HANDLE_PRAGMA_PACK_PUSH_POP
 331
 332 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 333 #undef CTORS_SECTION_ASM_OP
 334 #undef DTORS_SECTION_ASM_OP
 335
 336 /* Determine whether the entire c99 runtime is present in the
 337    runtime library.  */
 338 #define TARGET_C99_FUNCTIONS 1
 339
 340 #define TARGET_POSIX_IO
 341
 342 #undef LINK_GCC_C_SEQUENCE_SPEC
 343 #define LINK_GCC_C_SEQUENCE_SPEC \
 344   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 345
 346 /* Use --as-needed -lgcc_s for eh support.  */
 347 #ifdef HAVE_LD_AS_NEEDED
 348 #define USE_LD_AS_NEEDED 1
 349 #endif
 350
 351 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 352
 353 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 354    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 355    change their minds.  */
 356 #undef SPARC_RELAXED_ORDERING
 357 #define SPARC_RELAXED_ORDERING true
 358
 359 #undef NEED_INDICATE_EXEC_STACK
 360 #define NEED_INDICATE_EXEC_STACK 1
 361
 362 #ifdef TARGET_LIBC_PROVIDES_SSP
 363 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 364    sparc64 glibc provides it at [%g7 + 0x28].  */
 365 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 366 #endif