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       LINUX_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    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  63
  64 #undef TARGET_VERSION
  65 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  66
  67 /* The default code model.  */
  68 #undef SPARC_DEFAULT_CMODEL
  69 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  70
  71 #undef WCHAR_TYPE
  72 #define WCHAR_TYPE "int"
  73
  74 #undef WCHAR_TYPE_SIZE
  75 #define WCHAR_TYPE_SIZE 32
  76
  77 /* Define for support of TFmode long double.
  78    SPARC ABI says that long double is 4 words.  */
  79 #undef LONG_DOUBLE_TYPE_SIZE
  80 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  81
  82 /* Define this to set long double type size to use in libgcc2.c, which can
  83    not depend on target_flags.  */
  84 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
  85 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
  86 #else
  87 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
  88 #endif
  89
  90 #undef CPP_SUBTARGET_SPEC
  91 #define CPP_SUBTARGET_SPEC "\
  92 %{posix:-D_POSIX_SOURCE} \
  93 %{pthread:-D_REENTRANT} \
  94 "
  95
  96 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  97    for the special GCC options -static and -shared, which allow us to
  98    link things in one of these three modes by applying the appropriate
  99    combinations of options at link-time. We like to support here for
 100    as many of the other GNU linker options as possible. But I don't
 101    have the time to search for those flags. I am sure how to add
 102    support for -soname shared_object_name. H.J.
 103
 104    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 105    -Wl,-V.
 106
 107    When the -shared link option is used a final link is not being
 108    done.  */
 109
 110 /* If ELF is the default format, we should not use /lib/elf.  */
 111
 112 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
 113 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
 114
 115 #ifdef SPARC_BI_ARCH
 116
 117 #undef SUBTARGET_EXTRA_SPECS
 118 #define SUBTARGET_EXTRA_SPECS \
 119   { "link_arch32",       LINK_ARCH32_SPEC },              \
 120   { "link_arch64",       LINK_ARCH64_SPEC },              \
 121   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 122   { "link_arch",         LINK_ARCH_SPEC },
 123
 124 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 125   %{!shared: \
 126     %{!ibcs: \
 127       %{!static: \
 128         %{rdynamic:-export-dynamic} \
 129         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \
 130         %{static:-static}}} \
 131 "
 132
 133 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 134   %{!shared: \
 135     %{!ibcs: \
 136       %{!static: \
 137         %{rdynamic:-export-dynamic} \
 138         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 139         %{static:-static}}} \
 140 "
 141
 142 #define LINK_ARCH_SPEC "\
 143 %{m32:%(link_arch32)} \
 144 %{m64:%(link_arch64)} \
 145 %{!m32:%{!m64:%(link_arch_default)}} \
 146 "
 147
 148 #define LINK_ARCH_DEFAULT_SPEC \
 149 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 150
 151 #undef  LINK_SPEC
 152 #define LINK_SPEC "\
 153 %(link_arch) \
 154 %{mlittle-endian:-EL} \
 155 %{!mno-relax:%{!r:-relax}} \
 156 "
 157
 158 #undef  CC1_SPEC
 159 #if DEFAULT_ARCH32_P
 160 #define CC1_SPEC "%{profile:-p} \
 161 %{sun4:} %{target:} \
 162 %{mcypress:-mcpu=cypress} \
 163 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 164 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 165 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 166 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 167   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 168   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 169 "
 170 #else
 171 #define CC1_SPEC "%{profile:-p} \
 172 %{sun4:} %{target:} \
 173 %{mcypress:-mcpu=cypress} \
 174 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 175 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 176 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 177 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 178   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 179 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 180 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 181 "
 182 #endif
 183
 184 /* Support for a compile-time default CPU, et cetera.  The rules are:
 185    --with-cpu is ignored if -mcpu is specified.
 186    --with-tune is ignored if -mtune is specified.
 187    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 188      are specified.
 189    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 190    here, otherwise say -mcpu=v7 would be passed even when -m64.
 191    CC1_SPEC above takes care of this instead.  */
 192 #undef OPTION_DEFAULT_SPECS
 193 #if DEFAULT_ARCH32_P
 194 #define OPTION_DEFAULT_SPECS \
 195   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 196   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 197   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 198 #else
 199 #define OPTION_DEFAULT_SPECS \
 200   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 201   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 202   {"float", "%{!msoft-float:%{!mhard-float:%{!fpu:%{!no-fpu:-m%(VALUE)-float}}}}" }
 203 #endif
 204
 205 #if DEFAULT_ARCH32_P
 206 #define MULTILIB_DEFAULTS { "m32" }
 207 #else
 208 #define MULTILIB_DEFAULTS { "m64" }
 209 #endif
 210
 211 #else /* !SPARC_BI_ARCH */
 212
 213 #undef LINK_SPEC
 214 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 215   %{!shared: \
 216     %{!ibcs: \
 217       %{!static: \
 218         %{rdynamic:-export-dynamic} \
 219         %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}} \
 220         %{static:-static}}} \
 221 %{mlittle-endian:-EL} \
 222 %{!mno-relax:%{!r:-relax}} \
 223 "
 224
 225 #endif /* !SPARC_BI_ARCH */
 226
 227 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 228    It's safe to pass -s always, even if -g is not used.  */
 229 #undef ASM_SPEC
 230 #define ASM_SPEC "\
 231 %{V} \
 232 %{v:%{!V:-V}} \
 233 %{!Qn:-Qy} \
 234 %{n} \
 235 %{T} \
 236 %{Ym,*} \
 237 %{Wa,*:%*} \
 238 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 239 %{mlittle-endian:-EL} \
 240 %(asm_cpu) %(asm_arch) %(asm_relax)"
 241
 242 /* Same as sparc.h */
 243 #undef DBX_REGISTER_NUMBER
 244 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 245
 246 #undef ASM_OUTPUT_ALIGNED_LOCAL
 247 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 248 do {                                                                    \
 249   fputs ("\t.local\t", (FILE));         \
 250   assemble_name ((FILE), (NAME));                                       \
 251   putc ('\n', (FILE));                                                  \
 252   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 253 } while (0)
 254
 255 #undef COMMON_ASM_OP
 256 #define COMMON_ASM_OP "\t.common\t"
 257
 258 #undef  LOCAL_LABEL_PREFIX
 259 #define LOCAL_LABEL_PREFIX  "."
 260
 261 /* This is how to store into the string LABEL
 262    the symbol_ref name of an internal numbered label where
 263    PREFIX is the class of label and NUM is the number within the class.
 264    This is suitable for output with `assemble_name'.  */
 265
 266 #undef  ASM_GENERATE_INTERNAL_LABEL
 267 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 268   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 269
 270 /* DWARF bits.  */
 271
 272 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 273    Obviously the Dwarf2 folks haven't tried to actually build systems
 274    with their spec.  On a 64-bit system, only 64-bit relocs become
 275    RELATIVE relocations.  */
 276
 277 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 278
 279 #undef DITF_CONVERSION_LIBFUNCS
 280 #define DITF_CONVERSION_LIBFUNCS 1
 281 \f
 282 #ifdef HAVE_AS_TLS
 283 #undef TARGET_SUN_TLS
 284 #undef TARGET_GNU_TLS
 285 #define TARGET_SUN_TLS 0
 286 #define TARGET_GNU_TLS 1
 287 #endif
 288 \f
 289 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 290 #undef CTORS_SECTION_ASM_OP
 291 #undef DTORS_SECTION_ASM_OP
 292
 293 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"
 294
 295 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 296    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 297    change their minds.  */
 298 #undef SPARC_RELAXED_ORDERING
 299 #define SPARC_RELAXED_ORDERING true
 300
 301 #undef NEED_INDICATE_EXEC_STACK
 302 #define NEED_INDICATE_EXEC_STACK 1
 303
 304 #ifdef TARGET_LIBC_PROVIDES_SSP
 305 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 306    sparc64 glibc provides it at [%g7 + 0x28].  */
 307 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 308 #endif
 309
 310 /* Define if long doubles should be mangled as 'g'.  */
 311 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 312
 313 /* We use glibc _mcount for profiling.  */
 314 #undef NO_PROFILE_COUNTERS
 315 #define NO_PROFILE_COUNTERS     1