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, 2007
   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 3, 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 COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #define TARGET_OS_CPP_BUILTINS()                        \
  23   do                                                    \
  24     {                                                   \
  25       builtin_define_std ("unix");                      \
  26       builtin_define_std ("linux");                     \
  27       builtin_define ("_LONGLONG");                     \
  28       builtin_define ("__gnu_linux__");                 \
  29       builtin_assert ("system=linux");                  \
  30       builtin_assert ("system=unix");                   \
  31       builtin_assert ("system=posix");                  \
  32       if (TARGET_ARCH32 && 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 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 \
  44     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc \
  45     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc3 \
  46     || TARGET_CPU_DEFAULT == TARGET_CPU_niagara
  47 /* A 64 bit v9 compiler with stack-bias,
  48    in a Medium/Low code model environment.  */
  49
  50 #undef TARGET_DEFAULT
  51 #define TARGET_DEFAULT \
  52   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  53    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  54 #endif
  55
  56 #undef ASM_CPU_DEFAULT_SPEC
  57 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  58
  59 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  60    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  61    provides part of the support for getting C++ file-scope static
  62    object constructed before entering `main'.  */
  63
  64 #undef  STARTFILE_SPEC
  65
  66 #ifdef HAVE_LD_PIE
  67 #define STARTFILE_SPEC \
  68   "%{!shared:%{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  69    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  70 #else
  71 #define STARTFILE_SPEC \
  72   "%{!shared:%{pg|p:gcrt1.o%s;:crt1.o%s}}\
  73    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  74 #endif
  75
  76 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  77    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  78    provides part of the support for getting C++ file-scope static
  79    object constructed before entering `main', followed by a normal
  80    GNU/Linux "finalizer" file, `crtn.o'.  */
  81
  82 #undef  ENDFILE_SPEC
  83
  84 #define ENDFILE_SPEC \
  85   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  86    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  87
  88 /* The GNU C++ standard library requires that these macros be defined.  */
  89 #undef CPLUSPLUS_CPP_SPEC
  90 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  91
  92 #undef TARGET_VERSION
  93 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  94
  95 /* The default code model.  */
  96 #undef SPARC_DEFAULT_CMODEL
  97 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  98
  99 #undef WCHAR_TYPE
 100 #define WCHAR_TYPE "int"
 101
 102 #undef WCHAR_TYPE_SIZE
 103 #define WCHAR_TYPE_SIZE 32
 104
 105 /* Define for support of TFmode long double.
 106    SPARC ABI says that long double is 4 words.  */
 107 #undef LONG_DOUBLE_TYPE_SIZE
 108 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 109
 110 /* Define this to set long double type size to use in libgcc2.c, which can
 111    not depend on target_flags.  */
 112 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 113 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 114 #else
 115 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 116 #endif
 117
 118 #undef CPP_SUBTARGET_SPEC
 119 #define CPP_SUBTARGET_SPEC "\
 120 %{posix:-D_POSIX_SOURCE} \
 121 %{pthread:-D_REENTRANT} \
 122 "
 123
 124 #undef LIB_SPEC
 125 #define LIB_SPEC \
 126   "%{pthread:-lpthread} \
 127    %{shared:-lc} \
 128    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 129
 130 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 131    for the special GCC options -static and -shared, which allow us to
 132    link things in one of these three modes by applying the appropriate
 133    combinations of options at link-time. We like to support here for
 134    as many of the other GNU linker options as possible. But I don't
 135    have the time to search for those flags. I am sure how to add
 136    support for -soname shared_object_name. H.J.
 137
 138    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 139    -Wl,-V.
 140
 141    When the -shared link option is used a final link is not being
 142    done.  */
 143
 144 /* If ELF is the default format, we should not use /lib/elf.  */
 145
 146 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
 147 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
 148 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
 149 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
 150 #if UCLIBC_DEFAULT
 151 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}"
 152 #else
 153 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}"
 154 #endif
 155 #define LINUX_DYNAMIC_LINKER32 \
 156   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
 157 #define LINUX_DYNAMIC_LINKER64 \
 158   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
 159
 160 #ifdef SPARC_BI_ARCH
 161
 162 #undef SUBTARGET_EXTRA_SPECS
 163 #define SUBTARGET_EXTRA_SPECS \
 164   { "link_arch32",       LINK_ARCH32_SPEC },              \
 165   { "link_arch64",       LINK_ARCH64_SPEC },              \
 166   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 167   { "link_arch",         LINK_ARCH_SPEC },
 168
 169 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 170   %{!shared: \
 171     %{!ibcs: \
 172       %{!static: \
 173         %{rdynamic:-export-dynamic} \
 174         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \
 175         %{static:-static}}} \
 176 "
 177
 178 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 179   %{!shared: \
 180     %{!ibcs: \
 181       %{!static: \
 182         %{rdynamic:-export-dynamic} \
 183         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 184         %{static:-static}}} \
 185 "
 186
 187 #define LINK_ARCH_SPEC "\
 188 %{m32:%(link_arch32)} \
 189 %{m64:%(link_arch64)} \
 190 %{!m32:%{!m64:%(link_arch_default)}} \
 191 "
 192
 193 #define LINK_ARCH_DEFAULT_SPEC \
 194 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 195
 196 #undef  LINK_SPEC
 197 #define LINK_SPEC "\
 198 %(link_arch) \
 199 %{mlittle-endian:-EL} \
 200 %{!mno-relax:%{!r:-relax}} \
 201 "
 202
 203 #undef  CC1_SPEC
 204 #if DEFAULT_ARCH32_P
 205 #define CC1_SPEC "\
 206 %{sun4:} %{target:} \
 207 %{mcypress:-mcpu=cypress} \
 208 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 209 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 210 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 211 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 212   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 213   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 214 "
 215 #else
 216 #define CC1_SPEC "\
 217 %{sun4:} %{target:} \
 218 %{mcypress:-mcpu=cypress} \
 219 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 220 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 221 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 222 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 223   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 224 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 225 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 226 "
 227 #endif
 228
 229 /* Support for a compile-time default CPU, et cetera.  The rules are:
 230    --with-cpu is ignored if -mcpu is specified.
 231    --with-tune is ignored if -mtune is specified.
 232    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 233      are specified.
 234    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 235    here, otherwise say -mcpu=v7 would be passed even when -m64.
 236    CC1_SPEC above takes care of this instead.  */
 237 #undef OPTION_DEFAULT_SPECS
 238 #if DEFAULT_ARCH32_P
 239 #define OPTION_DEFAULT_SPECS \
 240   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 241   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 242   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 243 #else
 244 #define OPTION_DEFAULT_SPECS \
 245   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 246   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 247   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 248 #endif
 249
 250 #if DEFAULT_ARCH32_P
 251 #define MULTILIB_DEFAULTS { "m32" }
 252 #else
 253 #define MULTILIB_DEFAULTS { "m64" }
 254 #endif
 255
 256 #else /* !SPARC_BI_ARCH */
 257
 258 #undef LINK_SPEC
 259 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 260   %{!shared: \
 261     %{!ibcs: \
 262       %{!static: \
 263         %{rdynamic:-export-dynamic} \
 264         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 265         %{static:-static}}} \
 266 %{mlittle-endian:-EL} \
 267 %{!mno-relax:%{!r:-relax}} \
 268 "
 269
 270 #endif /* !SPARC_BI_ARCH */
 271
 272 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 273    It's safe to pass -s always, even if -g is not used.  */
 274 #undef ASM_SPEC
 275 #define ASM_SPEC "\
 276 %{V} \
 277 %{v:%{!V:-V}} \
 278 %{!Qn:-Qy} \
 279 %{n} \
 280 %{T} \
 281 %{Ym,*} \
 282 %{Wa,*:%*} \
 283 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 284 %{mlittle-endian:-EL} \
 285 %(asm_cpu) %(asm_arch) %(asm_relax)"
 286
 287 /* Same as sparc.h */
 288 #undef DBX_REGISTER_NUMBER
 289 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 290
 291 #undef ASM_OUTPUT_ALIGNED_LOCAL
 292 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 293 do {                                                                    \
 294   fputs ("\t.local\t", (FILE));         \
 295   assemble_name ((FILE), (NAME));                                       \
 296   putc ('\n', (FILE));                                                  \
 297   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 298 } while (0)
 299
 300 #undef COMMON_ASM_OP
 301 #define COMMON_ASM_OP "\t.common\t"
 302
 303 #undef  LOCAL_LABEL_PREFIX
 304 #define LOCAL_LABEL_PREFIX  "."
 305
 306 /* This is how to store into the string LABEL
 307    the symbol_ref name of an internal numbered label where
 308    PREFIX is the class of label and NUM is the number within the class.
 309    This is suitable for output with `assemble_name'.  */
 310
 311 #undef  ASM_GENERATE_INTERNAL_LABEL
 312 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 313   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 314
 315 /* DWARF bits.  */
 316
 317 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 318    Obviously the Dwarf2 folks haven't tried to actually build systems
 319    with their spec.  On a 64-bit system, only 64-bit relocs become
 320    RELATIVE relocations.  */
 321
 322 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 323
 324 #undef DITF_CONVERSION_LIBFUNCS
 325 #define DITF_CONVERSION_LIBFUNCS 1
 326
 327 #if defined(HAVE_LD_EH_FRAME_HDR)
 328 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 329 #endif
 330 \f
 331 #ifdef HAVE_AS_TLS
 332 #undef TARGET_SUN_TLS
 333 #undef TARGET_GNU_TLS
 334 #define TARGET_SUN_TLS 0
 335 #define TARGET_GNU_TLS 1
 336 #endif
 337 \f
 338 /* Don't be different from other Linux platforms in this regard.  */
 339 #define HANDLE_PRAGMA_PACK_PUSH_POP
 340
 341 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 342 #undef CTORS_SECTION_ASM_OP
 343 #undef DTORS_SECTION_ASM_OP
 344
 345 /* Determine whether the entire c99 runtime is present in the
 346    runtime library.  */
 347 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
 348
 349 /* Whether we have sincos that follows the GNU extension.  */
 350 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
 351
 352 #define TARGET_POSIX_IO
 353
 354 #undef LINK_GCC_C_SEQUENCE_SPEC
 355 #define LINK_GCC_C_SEQUENCE_SPEC \
 356   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 357
 358 /* Use --as-needed -lgcc_s for eh support.  */
 359 #ifdef HAVE_LD_AS_NEEDED
 360 #define USE_LD_AS_NEEDED 1
 361 #endif
 362
 363 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 364
 365 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 366    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 367    change their minds.  */
 368 #undef SPARC_RELAXED_ORDERING
 369 #define SPARC_RELAXED_ORDERING true
 370
 371 #undef NEED_INDICATE_EXEC_STACK
 372 #define NEED_INDICATE_EXEC_STACK 1
 373
 374 #ifdef TARGET_LIBC_PROVIDES_SSP
 375 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 376    sparc64 glibc provides it at [%g7 + 0x28].  */
 377 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 378 #endif
 379
 380 /* Define if long doubles should be mangled as 'g'.  */
 381 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING