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, 2006
   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 (TARGET_ARCH32 && TARGET_LONG_DOUBLE_128)      \
  34         builtin_define ("__LONG_DOUBLE_128__");         \
  35     }                                                   \
  36   while (0)
  37
  38 /* Don't assume anything about the header files.  */
  39 #define NO_IMPLICIT_EXTERN_C
  40
  41 #undef MD_EXEC_PREFIX
  42 #undef MD_STARTFILE_PREFIX
  43
  44 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 \
  45     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc \
  46     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc3 \
  47     || TARGET_CPU_DEFAULT == TARGET_CPU_niagara
  48 /* A 64 bit v9 compiler with stack-bias,
  49    in a Medium/Low code model environment.  */
  50
  51 #undef TARGET_DEFAULT
  52 #define TARGET_DEFAULT \
  53   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  54    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  55 #endif
  56
  57 #undef ASM_CPU_DEFAULT_SPEC
  58 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  59
  60 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  61    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  62    provides part of the support for getting C++ file-scope static
  63    object constructed before entering `main'.  */
  64
  65 #undef  STARTFILE_SPEC
  66
  67 #ifdef HAVE_LD_PIE
  68 #define STARTFILE_SPEC \
  69   "%{!shared:%{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  70    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  71 #else
  72 #define STARTFILE_SPEC \
  73   "%{!shared:%{pg|p:gcrt1.o%s;:crt1.o%s}}\
  74    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  75 #endif
  76
  77 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  78    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  79    provides part of the support for getting C++ file-scope static
  80    object constructed before entering `main', followed by a normal
  81    GNU/Linux "finalizer" file, `crtn.o'.  */
  82
  83 #undef  ENDFILE_SPEC
  84
  85 #define ENDFILE_SPEC \
  86   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  87    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  88
  89 /* The GNU C++ standard library requires that these macros be defined.  */
  90 #undef CPLUSPLUS_CPP_SPEC
  91 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  92
  93 #undef TARGET_VERSION
  94 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  95
  96 /* The default code model.  */
  97 #undef SPARC_DEFAULT_CMODEL
  98 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  99
 100 #undef WCHAR_TYPE
 101 #define WCHAR_TYPE "int"
 102
 103 #undef WCHAR_TYPE_SIZE
 104 #define WCHAR_TYPE_SIZE 32
 105
 106 /* Define for support of TFmode long double.
 107    SPARC ABI says that long double is 4 words.  */
 108 #undef LONG_DOUBLE_TYPE_SIZE
 109 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 110
 111 /* Define this to set long double type size to use in libgcc2.c, which can
 112    not depend on target_flags.  */
 113 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 114 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 115 #else
 116 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 117 #endif
 118
 119 #undef CPP_SUBTARGET_SPEC
 120 #define CPP_SUBTARGET_SPEC "\
 121 %{posix:-D_POSIX_SOURCE} \
 122 %{pthread:-D_REENTRANT} \
 123 "
 124
 125 #undef LIB_SPEC
 126 #define LIB_SPEC \
 127   "%{pthread:-lpthread} \
 128    %{shared:-lc} \
 129    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 130
 131 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 132    for the special GCC options -static and -shared, which allow us to
 133    link things in one of these three modes by applying the appropriate
 134    combinations of options at link-time. We like to support here for
 135    as many of the other GNU linker options as possible. But I don't
 136    have the time to search for those flags. I am sure how to add
 137    support for -soname shared_object_name. H.J.
 138
 139    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 140    -Wl,-V.
 141
 142    When the -shared link option is used a final link is not being
 143    done.  */
 144
 145 /* If ELF is the default format, we should not use /lib/elf.  */
 146
 147 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
 148 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
 149 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
 150 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
 151 #if UCLIBC_DEFAULT
 152 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}"
 153 #else
 154 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}"
 155 #endif
 156 #define LINUX_DYNAMIC_LINKER32 \
 157   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
 158 #define LINUX_DYNAMIC_LINKER64 \
 159   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
 160
 161 #ifdef SPARC_BI_ARCH
 162
 163 #undef SUBTARGET_EXTRA_SPECS
 164 #define SUBTARGET_EXTRA_SPECS \
 165   { "link_arch32",       LINK_ARCH32_SPEC },              \
 166   { "link_arch64",       LINK_ARCH64_SPEC },              \
 167   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 168   { "link_arch",         LINK_ARCH_SPEC },
 169
 170 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 171   %{!shared: \
 172     %{!ibcs: \
 173       %{!static: \
 174         %{rdynamic:-export-dynamic} \
 175         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \
 176         %{static:-static}}} \
 177 "
 178
 179 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 180   %{!shared: \
 181     %{!ibcs: \
 182       %{!static: \
 183         %{rdynamic:-export-dynamic} \
 184         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 185         %{static:-static}}} \
 186 "
 187
 188 #define LINK_ARCH_SPEC "\
 189 %{m32:%(link_arch32)} \
 190 %{m64:%(link_arch64)} \
 191 %{!m32:%{!m64:%(link_arch_default)}} \
 192 "
 193
 194 #define LINK_ARCH_DEFAULT_SPEC \
 195 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 196
 197 #undef  LINK_SPEC
 198 #define LINK_SPEC "\
 199 %(link_arch) \
 200 %{mlittle-endian:-EL} \
 201 %{!mno-relax:%{!r:-relax}} \
 202 "
 203
 204 #undef  CC1_SPEC
 205 #if DEFAULT_ARCH32_P
 206 #define CC1_SPEC "\
 207 %{sun4:} %{target:} \
 208 %{mcypress:-mcpu=cypress} \
 209 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 210 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 211 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 212 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 213   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 214   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 215 "
 216 #else
 217 #define CC1_SPEC "\
 218 %{sun4:} %{target:} \
 219 %{mcypress:-mcpu=cypress} \
 220 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 221 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 222 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 223 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 224   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 225 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 226 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 227 "
 228 #endif
 229
 230 /* Support for a compile-time default CPU, et cetera.  The rules are:
 231    --with-cpu is ignored if -mcpu is specified.
 232    --with-tune is ignored if -mtune is specified.
 233    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 234      are specified.
 235    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 236    here, otherwise say -mcpu=v7 would be passed even when -m64.
 237    CC1_SPEC above takes care of this instead.  */
 238 #undef OPTION_DEFAULT_SPECS
 239 #if DEFAULT_ARCH32_P
 240 #define OPTION_DEFAULT_SPECS \
 241   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 242   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 243   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 244 #else
 245 #define OPTION_DEFAULT_SPECS \
 246   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 247   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 248   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 249 #endif
 250
 251 #if DEFAULT_ARCH32_P
 252 #define MULTILIB_DEFAULTS { "m32" }
 253 #else
 254 #define MULTILIB_DEFAULTS { "m64" }
 255 #endif
 256
 257 #else /* !SPARC_BI_ARCH */
 258
 259 #undef LINK_SPEC
 260 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 261   %{!shared: \
 262     %{!ibcs: \
 263       %{!static: \
 264         %{rdynamic:-export-dynamic} \
 265         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 266         %{static:-static}}} \
 267 %{mlittle-endian:-EL} \
 268 %{!mno-relax:%{!r:-relax}} \
 269 "
 270
 271 #endif /* !SPARC_BI_ARCH */
 272
 273 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 274    It's safe to pass -s always, even if -g is not used.  */
 275 #undef ASM_SPEC
 276 #define ASM_SPEC "\
 277 %{V} \
 278 %{v:%{!V:-V}} \
 279 %{!Qn:-Qy} \
 280 %{n} \
 281 %{T} \
 282 %{Ym,*} \
 283 %{Wa,*:%*} \
 284 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 285 %{mlittle-endian:-EL} \
 286 %(asm_cpu) %(asm_arch) %(asm_relax)"
 287
 288 /* Same as sparc.h */
 289 #undef DBX_REGISTER_NUMBER
 290 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 291
 292 #undef ASM_OUTPUT_ALIGNED_LOCAL
 293 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 294 do {                                                                    \
 295   fputs ("\t.local\t", (FILE));         \
 296   assemble_name ((FILE), (NAME));                                       \
 297   putc ('\n', (FILE));                                                  \
 298   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 299 } while (0)
 300
 301 #undef COMMON_ASM_OP
 302 #define COMMON_ASM_OP "\t.common\t"
 303
 304 #undef  LOCAL_LABEL_PREFIX
 305 #define LOCAL_LABEL_PREFIX  "."
 306
 307 /* This is how to store into the string LABEL
 308    the symbol_ref name of an internal numbered label where
 309    PREFIX is the class of label and NUM is the number within the class.
 310    This is suitable for output with `assemble_name'.  */
 311
 312 #undef  ASM_GENERATE_INTERNAL_LABEL
 313 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 314   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 315
 316 /* DWARF bits.  */
 317
 318 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 319    Obviously the Dwarf2 folks haven't tried to actually build systems
 320    with their spec.  On a 64-bit system, only 64-bit relocs become
 321    RELATIVE relocations.  */
 322
 323 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 324
 325 #undef DITF_CONVERSION_LIBFUNCS
 326 #define DITF_CONVERSION_LIBFUNCS 1
 327
 328 #if defined(HAVE_LD_EH_FRAME_HDR)
 329 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 330 #endif
 331 \f
 332 #ifdef HAVE_AS_TLS
 333 #undef TARGET_SUN_TLS
 334 #undef TARGET_GNU_TLS
 335 #define TARGET_SUN_TLS 0
 336 #define TARGET_GNU_TLS 1
 337 #endif
 338 \f
 339 /* Don't be different from other Linux platforms in this regard.  */
 340 #define HANDLE_PRAGMA_PACK_PUSH_POP
 341
 342 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 343 #undef CTORS_SECTION_ASM_OP
 344 #undef DTORS_SECTION_ASM_OP
 345
 346 /* Determine whether the entire c99 runtime is present in the
 347    runtime library.  */
 348 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
 349
 350 #define TARGET_POSIX_IO
 351
 352 #undef LINK_GCC_C_SEQUENCE_SPEC
 353 #define LINK_GCC_C_SEQUENCE_SPEC \
 354   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 355
 356 /* Use --as-needed -lgcc_s for eh support.  */
 357 #ifdef HAVE_LD_AS_NEEDED
 358 #define USE_LD_AS_NEEDED 1
 359 #endif
 360
 361 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 362
 363 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 364    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 365    change their minds.  */
 366 #undef SPARC_RELAXED_ORDERING
 367 #define SPARC_RELAXED_ORDERING true
 368
 369 #undef NEED_INDICATE_EXEC_STACK
 370 #define NEED_INDICATE_EXEC_STACK 1
 371
 372 #ifdef TARGET_LIBC_PROVIDES_SSP
 373 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 374    sparc64 glibc provides it at [%g7 + 0x28].  */
 375 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 376 #endif
 377
 378 /* Define if long doubles should be mangled as 'g'.  */
 379 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING