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, 2012 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 /* On Linux, the combination sparc64-* --with-cpu=v8 is supported and
  35    selects a 32-bit compiler.  */
  36 #if defined(TARGET_64BIT_DEFAULT) && TARGET_CPU_DEFAULT >= TARGET_CPU_v9
  37 #undef TARGET_DEFAULT
  38 #define TARGET_DEFAULT \
  39   (MASK_V9 + MASK_PTR64 + MASK_64BIT + MASK_STACK_BIAS + \
  40    MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  41 #endif
  42
  43 /* This must be v9a not just v9 because by default we enable
  44    -mvis.  */
  45 #undef ASM_CPU64_DEFAULT_SPEC
  46 #define ASM_CPU64_DEFAULT_SPEC "-Av9a"
  47
  48 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  49    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  50    provides part of the support for getting C++ file-scope static
  51    object constructed before entering `main', followed by a normal
  52    GNU/Linux "finalizer" file, `crtn.o'.  */
  53
  54 #undef  ENDFILE_SPEC
  55 #define ENDFILE_SPEC \
  56   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  57    %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  58
  59 /* The default code model.  */
  60 #undef SPARC_DEFAULT_CMODEL
  61 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  62
  63 #undef WCHAR_TYPE
  64 #define WCHAR_TYPE "int"
  65
  66 #undef WCHAR_TYPE_SIZE
  67 #define WCHAR_TYPE_SIZE 32
  68
  69 /* Define for support of TFmode long double.
  70    SPARC ABI says that long double is 4 words.  */
  71 #undef LONG_DOUBLE_TYPE_SIZE
  72 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  73
  74 /* Define this to set long double type size to use in libgcc2.c, which can
  75    not depend on target_flags.  */
  76 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
  77 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
  78 #else
  79 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
  80 #endif
  81
  82 #undef CPP_SUBTARGET_SPEC
  83 #define CPP_SUBTARGET_SPEC "\
  84 %{posix:-D_POSIX_SOURCE} \
  85 %{pthread:-D_REENTRANT} \
  86 "
  87
  88 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  89    for the special GCC options -static and -shared, which allow us to
  90    link things in one of these three modes by applying the appropriate
  91    combinations of options at link-time.
  92
  93    When the -shared link option is used a final link is not being
  94    done.  */
  95
  96 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
  97 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
  98
  99 #ifdef SPARC_BI_ARCH
 100
 101 #undef SUBTARGET_EXTRA_SPECS
 102 #define SUBTARGET_EXTRA_SPECS \
 103   { "link_arch32",       LINK_ARCH32_SPEC },              \
 104   { "link_arch64",       LINK_ARCH64_SPEC },              \
 105   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 106   { "link_arch",         LINK_ARCH_SPEC },
 107
 108 #define LINK_ARCH32_SPEC "-m elf32_sparc %{shared:-shared} \
 109   %{!shared: \
 110     %{!static: \
 111       %{rdynamic:-export-dynamic} \
 112       -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
 113       %{static:-static}} \
 114 "
 115
 116 #define LINK_ARCH64_SPEC "-m elf64_sparc %{shared:-shared} \
 117   %{!shared: \
 118     %{!static: \
 119       %{rdynamic:-export-dynamic} \
 120       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 121       %{static:-static}} \
 122 "
 123
 124 #define LINK_ARCH_SPEC "\
 125 %{m32:%(link_arch32)} \
 126 %{m64:%(link_arch64)} \
 127 %{!m32:%{!m64:%(link_arch_default)}} \
 128 "
 129
 130 #define LINK_ARCH_DEFAULT_SPEC \
 131 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 132
 133 #undef  LINK_SPEC
 134 #define LINK_SPEC "\
 135 %(link_arch) \
 136 %{!mno-relax:%{!r:-relax}} \
 137 "
 138
 139 /* -mcpu=native handling only makes sense with compiler running on
 140    a SPARC chip.  */
 141 #if defined(__sparc__) && defined(__linux__)
 142 extern const char *host_detect_local_cpu (int argc, const char **argv);
 143 # define EXTRA_SPEC_FUNCTIONS                                           \
 144   { "local_cpu_detect", host_detect_local_cpu },
 145
 146 # define MCPU_MTUNE_NATIVE_SPECS                                        \
 147    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
 148    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 149 #else
 150 # define MCPU_MTUNE_NATIVE_SPECS ""
 151 #endif
 152
 153 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
 154
 155 #undef  CC1_SPEC
 156 #if DEFAULT_ARCH32_P
 157 #define CC1_SPEC "%{profile:-p} \
 158 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 159 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 160   %{!mcpu*:-mcpu=ultrasparc} \
 161   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 162 "
 163 #else
 164 #define CC1_SPEC "%{profile:-p} \
 165 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 166 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 167   %{!mcpu*:-mcpu=cypress}} \
 168 %{mv8plus:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 169   %{!mcpu*:-mcpu=v9}} \
 170 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 171 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 172 "
 173 #endif
 174
 175 /* Support for a compile-time default CPU, et cetera.  The rules are:
 176    --with-cpu is ignored if -mcpu is specified.
 177    --with-tune is ignored if -mtune is specified.
 178    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 179      are specified.
 180    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 181    here, otherwise say -mcpu=v7 would be passed even when -m64.
 182    CC1_SPEC above takes care of this instead.  */
 183 #undef OPTION_DEFAULT_SPECS
 184 #if DEFAULT_ARCH32_P
 185 #define OPTION_DEFAULT_SPECS \
 186   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 187   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 188   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 189 #else
 190 #define OPTION_DEFAULT_SPECS \
 191   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 192   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 193   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 194 #endif
 195
 196 #if DEFAULT_ARCH32_P
 197 #define MULTILIB_DEFAULTS { "m32" }
 198 #else
 199 #define MULTILIB_DEFAULTS { "m64" }
 200 #endif
 201
 202 #else /* !SPARC_BI_ARCH */
 203
 204 #undef LINK_SPEC
 205 #define LINK_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
 206   %{!shared: \
 207     %{!static: \
 208       %{rdynamic:-export-dynamic} \
 209       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 210     %{static:-static}} \
 211 %{!mno-relax:%{!r:-relax}} \
 212 "
 213
 214 #endif /* !SPARC_BI_ARCH */
 215
 216 /* It's safe to pass -s always, even if -g is not used.  */
 217 #undef ASM_SPEC
 218 #define ASM_SPEC "\
 219 -s \
 220 %{fpic|fPIC|fpie|fPIE:-K PIC} \
 221 %{!.c:%{findirect-dispatch:-K PIC}} \
 222 %(asm_cpu) %(asm_arch) %(asm_relax)"
 223
 224 #undef ASM_OUTPUT_ALIGNED_LOCAL
 225 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 226 do {                                                                    \
 227   fputs ("\t.local\t", (FILE));         \
 228   assemble_name ((FILE), (NAME));                                       \
 229   putc ('\n', (FILE));                                                  \
 230   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 231 } while (0)
 232
 233 #undef COMMON_ASM_OP
 234 #define COMMON_ASM_OP "\t.common\t"
 235
 236 #undef  LOCAL_LABEL_PREFIX
 237 #define LOCAL_LABEL_PREFIX  "."
 238
 239 /* DWARF bits.  */
 240
 241 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 242    Obviously the Dwarf2 folks haven't tried to actually build systems
 243    with their spec.  On a 64-bit system, only 64-bit relocs become
 244    RELATIVE relocations.  */
 245
 246 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 247
 248 #undef DITF_CONVERSION_LIBFUNCS
 249 #define DITF_CONVERSION_LIBFUNCS 1
 250 \f
 251 #ifdef HAVE_AS_TLS
 252 #undef TARGET_SUN_TLS
 253 #undef TARGET_GNU_TLS
 254 #define TARGET_SUN_TLS 0
 255 #define TARGET_GNU_TLS 1
 256 #endif
 257 \f
 258 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 259 #undef CTORS_SECTION_ASM_OP
 260 #undef DTORS_SECTION_ASM_OP
 261
 262 /* Static stack checking is supported by means of probes.  */
 263 #define STACK_CHECK_STATIC_BUILTIN 1
 264
 265 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 266    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 267    change their minds.  */
 268 #undef SPARC_RELAXED_ORDERING
 269 #define SPARC_RELAXED_ORDERING true
 270
 271 #undef NEED_INDICATE_EXEC_STACK
 272 #define NEED_INDICATE_EXEC_STACK 1
 273
 274 #ifdef TARGET_LIBC_PROVIDES_SSP
 275 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 276    sparc64 glibc provides it at [%g7 + 0x28].  */
 277 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 278 #endif
 279
 280 /* Define if long doubles should be mangled as 'g'.  */
 281 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 282
 283 /* We use glibc _mcount for profiling.  */
 284 #undef NO_PROFILE_COUNTERS
 285 #define NO_PROFILE_COUNTERS     1