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, 2008,
   3    2009, 2010, 2011 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       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  26       if (TARGET_ARCH64)                        \
  27         builtin_define ("_LONGLONG");           \
  28       if (TARGET_ARCH32                         \
  29           && TARGET_LONG_DOUBLE_128)            \
  30         builtin_define ("__LONG_DOUBLE_128__"); \
  31     }                                           \
  32   while (0)
  33
  34 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 \
  35     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc \
  36     || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc3 \
  37     || TARGET_CPU_DEFAULT == TARGET_CPU_niagara \
  38     || TARGET_CPU_DEFAULT == TARGET_CPU_niagara2
  39 /* A 64 bit v9 compiler with stack-bias,
  40    in a Medium/Low code model environment.  */
  41
  42 #undef TARGET_DEFAULT
  43 #define TARGET_DEFAULT \
  44   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  45    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  46 #endif
  47
  48 /* This must be v9a not just v9 because by default we enable
  49    -mvis.  */
  50 #undef ASM_CPU64_DEFAULT_SPEC
  51 #define ASM_CPU64_DEFAULT_SPEC "-Av9a"
  52
  53 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  54    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  55    provides part of the support for getting C++ file-scope static
  56    object constructed before entering `main', followed by a normal
  57    GNU/Linux "finalizer" file, `crtn.o'.  */
  58
  59 #undef  ENDFILE_SPEC
  60 #define ENDFILE_SPEC \
  61   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  62    %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  63
  64 /* The default code model.  */
  65 #undef SPARC_DEFAULT_CMODEL
  66 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  67
  68 #undef WCHAR_TYPE
  69 #define WCHAR_TYPE "int"
  70
  71 #undef WCHAR_TYPE_SIZE
  72 #define WCHAR_TYPE_SIZE 32
  73
  74 /* Define for support of TFmode long double.
  75    SPARC ABI says that long double is 4 words.  */
  76 #undef LONG_DOUBLE_TYPE_SIZE
  77 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  78
  79 /* Define this to set long double type size to use in libgcc2.c, which can
  80    not depend on target_flags.  */
  81 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
  82 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
  83 #else
  84 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
  85 #endif
  86
  87 #undef CPP_SUBTARGET_SPEC
  88 #define CPP_SUBTARGET_SPEC "\
  89 %{posix:-D_POSIX_SOURCE} \
  90 %{pthread:-D_REENTRANT} \
  91 "
  92
  93 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  94    for the special GCC options -static and -shared, which allow us to
  95    link things in one of these three modes by applying the appropriate
  96    combinations of options at link-time.
  97
  98    When the -shared link option is used a final link is not being
  99    done.  */
 100
 101 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
 102 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
 103
 104 #ifdef SPARC_BI_ARCH
 105
 106 #undef SUBTARGET_EXTRA_SPECS
 107 #define SUBTARGET_EXTRA_SPECS \
 108   { "link_arch32",       LINK_ARCH32_SPEC },              \
 109   { "link_arch64",       LINK_ARCH64_SPEC },              \
 110   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 111   { "link_arch",         LINK_ARCH_SPEC },
 112
 113 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,%R/usr/lib %{shared:-shared} \
 114   %{!shared: \
 115     %{!static: \
 116       %{rdynamic:-export-dynamic} \
 117       -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
 118       %{static:-static}} \
 119 "
 120
 121 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
 122   %{!shared: \
 123     %{!static: \
 124       %{rdynamic:-export-dynamic} \
 125       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 126       %{static:-static}} \
 127 "
 128
 129 #define LINK_ARCH_SPEC "\
 130 %{m32:%(link_arch32)} \
 131 %{m64:%(link_arch64)} \
 132 %{!m32:%{!m64:%(link_arch_default)}} \
 133 "
 134
 135 #define LINK_ARCH_DEFAULT_SPEC \
 136 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 137
 138 #undef  LINK_SPEC
 139 #define LINK_SPEC "\
 140 %(link_arch) \
 141 %{mlittle-endian:-EL} \
 142 %{!mno-relax:%{!r:-relax}} \
 143 "
 144
 145 /* -mcpu=native handling only makes sense with compiler running on
 146    a SPARC chip.  */
 147 #if defined(__sparc__)
 148 extern const char *host_detect_local_cpu (int argc, const char **argv);
 149 # define EXTRA_SPEC_FUNCTIONS                                           \
 150   { "local_cpu_detect", host_detect_local_cpu },
 151
 152 # define MCPU_MTUNE_NATIVE_SPECS                                        \
 153    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
 154    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 155 #else
 156 # define MCPU_MTUNE_NATIVE_SPECS ""
 157 #endif
 158
 159 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
 160
 161 #undef  CC1_SPEC
 162 #if DEFAULT_ARCH32_P
 163 #define CC1_SPEC "%{profile:-p} \
 164 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 165 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 166   %{!mcpu*:-mcpu=ultrasparc} \
 167   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 168 "
 169 #else
 170 #define CC1_SPEC "%{profile:-p} \
 171 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 172 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 173   %{!mcpu*:-mcpu=cypress}} \
 174 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 175 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 176 "
 177 #endif
 178
 179 /* Support for a compile-time default CPU, et cetera.  The rules are:
 180    --with-cpu is ignored if -mcpu is specified.
 181    --with-tune is ignored if -mtune is specified.
 182    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 183      are specified.
 184    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 185    here, otherwise say -mcpu=v7 would be passed even when -m64.
 186    CC1_SPEC above takes care of this instead.  */
 187 #undef OPTION_DEFAULT_SPECS
 188 #if DEFAULT_ARCH32_P
 189 #define OPTION_DEFAULT_SPECS \
 190   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 191   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 192   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 193 #else
 194 #define OPTION_DEFAULT_SPECS \
 195   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 196   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 197   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 198 #endif
 199
 200 #if DEFAULT_ARCH32_P
 201 #define MULTILIB_DEFAULTS { "m32" }
 202 #else
 203 #define MULTILIB_DEFAULTS { "m64" }
 204 #endif
 205
 206 #else /* !SPARC_BI_ARCH */
 207
 208 #undef LINK_SPEC
 209 #define LINK_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
 210   %{!shared: \
 211     %{!static: \
 212       %{rdynamic:-export-dynamic} \
 213       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 214     %{static:-static}} \
 215 %{mlittle-endian:-EL} \
 216 %{!mno-relax:%{!r:-relax}} \
 217 "
 218
 219 #endif /* !SPARC_BI_ARCH */
 220
 221 /* It's safe to pass -s always, even if -g is not used.  */
 222 #undef ASM_SPEC
 223 #define ASM_SPEC "\
 224 -s \
 225 %{fpic|fPIC|fpie|fPIE:-K PIC} \
 226 %{!.c:%{findirect-dispatch:-K PIC}} \
 227 %{mlittle-endian:-EL} \
 228 %(asm_cpu) %(asm_arch) %(asm_relax)"
 229
 230 #undef ASM_OUTPUT_ALIGNED_LOCAL
 231 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 232 do {                                                                    \
 233   fputs ("\t.local\t", (FILE));         \
 234   assemble_name ((FILE), (NAME));                                       \
 235   putc ('\n', (FILE));                                                  \
 236   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 237 } while (0)
 238
 239 #undef COMMON_ASM_OP
 240 #define COMMON_ASM_OP "\t.common\t"
 241
 242 #undef  LOCAL_LABEL_PREFIX
 243 #define LOCAL_LABEL_PREFIX  "."
 244
 245 /* This is how to store into the string LABEL
 246    the symbol_ref name of an internal numbered label where
 247    PREFIX is the class of label and NUM is the number within the class.
 248    This is suitable for output with `assemble_name'.  */
 249
 250 #undef  ASM_GENERATE_INTERNAL_LABEL
 251 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 252   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 253
 254 /* DWARF bits.  */
 255
 256 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 257    Obviously the Dwarf2 folks haven't tried to actually build systems
 258    with their spec.  On a 64-bit system, only 64-bit relocs become
 259    RELATIVE relocations.  */
 260
 261 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 262
 263 #undef DITF_CONVERSION_LIBFUNCS
 264 #define DITF_CONVERSION_LIBFUNCS 1
 265 \f
 266 #ifdef HAVE_AS_TLS
 267 #undef TARGET_SUN_TLS
 268 #undef TARGET_GNU_TLS
 269 #define TARGET_SUN_TLS 0
 270 #define TARGET_GNU_TLS 1
 271 #endif
 272 \f
 273 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 274 #undef CTORS_SECTION_ASM_OP
 275 #undef DTORS_SECTION_ASM_OP
 276
 277 /* Static stack checking is supported by means of probes.  */
 278 #define STACK_CHECK_STATIC_BUILTIN 1
 279
 280 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 281    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 282    change their minds.  */
 283 #undef SPARC_RELAXED_ORDERING
 284 #define SPARC_RELAXED_ORDERING true
 285
 286 #undef NEED_INDICATE_EXEC_STACK
 287 #define NEED_INDICATE_EXEC_STACK 1
 288
 289 #ifdef TARGET_LIBC_PROVIDES_SSP
 290 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 291    sparc64 glibc provides it at [%g7 + 0x28].  */
 292 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 293 #endif
 294
 295 /* Define if long doubles should be mangled as 'g'.  */
 296 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 297
 298 /* We use glibc _mcount for profiling.  */
 299 #undef NO_PROFILE_COUNTERS
 300 #define NO_PROFILE_COUNTERS     1