gcc/config/sparc/linux64.h

   1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996-2015 Free Software Foundation, Inc.
   3    Contributed by David S. Miller (davem@caip.rutgers.edu)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define TARGET_OS_CPP_BUILTINS()                \
  22   do                                            \
  23     {                                           \
  24       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  25       if (TARGET_ARCH64)                        \
  26         builtin_define ("_LONGLONG");           \
  27       if (TARGET_ARCH32                         \
  28           && TARGET_LONG_DOUBLE_128)            \
  29         builtin_define ("__LONG_DOUBLE_128__"); \
  30     }                                           \
  31   while (0)
  32
  33 /* On Linux, the combination sparc64-* --with-cpu=v8 is supported and
  34    selects a 32-bit compiler.  */
  35 #if defined(TARGET_64BIT_DEFAULT) && TARGET_CPU_DEFAULT >= TARGET_CPU_v9
  36 #undef TARGET_DEFAULT
  37 #define TARGET_DEFAULT \
  38   (MASK_V9 + MASK_PTR64 + MASK_64BIT + MASK_STACK_BIAS + \
  39    MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  40 #endif
  41
  42 /* This must be v9a not just v9 because by default we enable
  43    -mvis.  */
  44 #undef ASM_CPU64_DEFAULT_SPEC
  45 #define ASM_CPU64_DEFAULT_SPEC "-Av9a"
  46
  47 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  48    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  49    provides part of the support for getting C++ file-scope static
  50    object constructed before entering `main', followed by a normal
  51    GNU/Linux "finalizer" file, `crtn.o'.  */
  52
  53 #undef  ENDFILE_SPEC
  54 #define ENDFILE_SPEC \
  55   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  56    %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  57
  58 /* The default code model.  */
  59 #undef SPARC_DEFAULT_CMODEL
  60 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  61
  62 #undef WCHAR_TYPE
  63 #define WCHAR_TYPE "int"
  64
  65 #undef WCHAR_TYPE_SIZE
  66 #define WCHAR_TYPE_SIZE 32
  67
  68 /* Define for support of TFmode long double.
  69    SPARC ABI says that long double is 4 words.  */
  70 #undef LONG_DOUBLE_TYPE_SIZE
  71 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  72
  73 #undef CPP_SUBTARGET_SPEC
  74 #define CPP_SUBTARGET_SPEC "\
  75 %{posix:-D_POSIX_SOURCE} \
  76 %{pthread:-D_REENTRANT} \
  77 "
  78
  79 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  80    for the special GCC options -static and -shared, which allow us to
  81    link things in one of these three modes by applying the appropriate
  82    combinations of options at link-time.
  83
  84    When the -shared link option is used a final link is not being
  85    done.  */
  86
  87 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
  88 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
  89
  90 #ifdef SPARC_BI_ARCH
  91
  92 #undef SUBTARGET_EXTRA_SPECS
  93 #define SUBTARGET_EXTRA_SPECS \
  94   { "link_arch32",       LINK_ARCH32_SPEC },              \
  95   { "link_arch64",       LINK_ARCH64_SPEC },              \
  96   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
  97   { "link_arch",         LINK_ARCH_SPEC },
  98
  99 #define LINK_ARCH32_SPEC "-m elf32_sparc %{shared:-shared} \
 100   %{!shared: \
 101     %{!static: \
 102       %{rdynamic:-export-dynamic} \
 103       -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
 104       %{static:-static}} \
 105 "
 106
 107 #define LINK_ARCH64_SPEC "-m elf64_sparc %{shared:-shared} \
 108   %{!shared: \
 109     %{!static: \
 110       %{rdynamic:-export-dynamic} \
 111       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 112       %{static:-static}} \
 113 "
 114
 115 #define LINK_ARCH_SPEC "\
 116 %{m32:%(link_arch32)} \
 117 %{m64:%(link_arch64)} \
 118 %{!m32:%{!m64:%(link_arch_default)}} \
 119 "
 120
 121 #define LINK_ARCH_DEFAULT_SPEC \
 122 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 123
 124 #undef  LINK_SPEC
 125 #define LINK_SPEC "\
 126 %(link_arch) \
 127 %{!mno-relax:%{!r:-relax}} \
 128 "
 129
 130 /* -mcpu=native handling only makes sense with compiler running on
 131    a SPARC chip.  */
 132 #if defined(__sparc__) && defined(__linux__)
 133 extern const char *host_detect_local_cpu (int argc, const char **argv);
 134 # define EXTRA_SPEC_FUNCTIONS                                           \
 135   { "local_cpu_detect", host_detect_local_cpu },
 136
 137 # define MCPU_MTUNE_NATIVE_SPECS                                        \
 138    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
 139    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 140 #else
 141 # define MCPU_MTUNE_NATIVE_SPECS ""
 142 #endif
 143
 144 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
 145
 146 #undef  CC1_SPEC
 147 #if DEFAULT_ARCH32_P
 148 #define CC1_SPEC "%{profile:-p} \
 149 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 150 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 151   %{!mcpu*:-mcpu=ultrasparc} \
 152   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 153 "
 154 #else
 155 #define CC1_SPEC "%{profile:-p} \
 156 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 157 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 158   %{!mcpu*:-mcpu=cypress}} \
 159 %{mv8plus:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 160   %{!mcpu*:-mcpu=v9}} \
 161 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 162 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 163 "
 164 #endif
 165
 166 /* Support for a compile-time default CPU, et cetera.  The rules are:
 167    --with-cpu is ignored if -mcpu is specified.
 168    --with-tune is ignored if -mtune is specified.
 169    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 170      are specified.
 171    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 172    here, otherwise say -mcpu=v7 would be passed even when -m64.
 173    CC1_SPEC above takes care of this instead.  */
 174 #undef OPTION_DEFAULT_SPECS
 175 #if DEFAULT_ARCH32_P
 176 #define OPTION_DEFAULT_SPECS \
 177   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 178   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 179   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 180 #else
 181 #define OPTION_DEFAULT_SPECS \
 182   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 183   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 184   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 185 #endif
 186
 187 #if DEFAULT_ARCH32_P
 188 #define MULTILIB_DEFAULTS { "m32" }
 189 #else
 190 #define MULTILIB_DEFAULTS { "m64" }
 191 #endif
 192
 193 #else /* !SPARC_BI_ARCH */
 194
 195 #undef LINK_SPEC
 196 #define LINK_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
 197   %{!shared: \
 198     %{!static: \
 199       %{rdynamic:-export-dynamic} \
 200       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 201     %{static:-static}} \
 202 %{!mno-relax:%{!r:-relax}} \
 203 "
 204
 205 #endif /* !SPARC_BI_ARCH */
 206
 207 /* It's safe to pass -s always, even if -g is not used.  */
 208 #undef ASM_SPEC
 209 #define ASM_SPEC "\
 210 -s \
 211 %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
 212 %{!.c:%{findirect-dispatch:-K PIC}} \
 213 %(asm_cpu) %(asm_arch) %(asm_relax)"
 214
 215 #undef ASM_OUTPUT_ALIGNED_LOCAL
 216 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 217 do {                                                                    \
 218   fputs ("\t.local\t", (FILE));         \
 219   assemble_name ((FILE), (NAME));                                       \
 220   putc ('\n', (FILE));                                                  \
 221   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 222 } while (0)
 223
 224 #undef COMMON_ASM_OP
 225 #define COMMON_ASM_OP "\t.common\t"
 226
 227 #undef  LOCAL_LABEL_PREFIX
 228 #define LOCAL_LABEL_PREFIX  "."
 229
 230 /* DWARF bits.  */
 231
 232 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 233    Obviously the Dwarf2 folks haven't tried to actually build systems
 234    with their spec.  On a 64-bit system, only 64-bit relocs become
 235    RELATIVE relocations.  */
 236
 237 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 238
 239 #undef DITF_CONVERSION_LIBFUNCS
 240 #define DITF_CONVERSION_LIBFUNCS 1
 241 \f
 242 #ifdef HAVE_AS_TLS
 243 #undef TARGET_SUN_TLS
 244 #undef TARGET_GNU_TLS
 245 #define TARGET_SUN_TLS 0
 246 #define TARGET_GNU_TLS 1
 247 #endif
 248 \f
 249 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 250 #undef CTORS_SECTION_ASM_OP
 251 #undef DTORS_SECTION_ASM_OP
 252
 253 /* Static stack checking is supported by means of probes.  */
 254 #define STACK_CHECK_STATIC_BUILTIN 1
 255
 256 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
 257    TMO, and TMO in multiprocessor mode.  But they reserve the right to
 258    change their minds.  */
 259 #undef SPARC_RELAXED_ORDERING
 260 #define SPARC_RELAXED_ORDERING true
 261
 262 #undef NEED_INDICATE_EXEC_STACK
 263 #define NEED_INDICATE_EXEC_STACK 1
 264
 265 #ifdef TARGET_LIBC_PROVIDES_SSP
 266 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 267    sparc64 glibc provides it at [%g7 + 0x28].  */
 268 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 269 #endif
 270
 271 /* Define if long doubles should be mangled as 'g'.  */
 272 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 273
 274 /* We use glibc _mcount for profiling.  */
 275 #undef NO_PROFILE_COUNTERS
 276 #define NO_PROFILE_COUNTERS     1