gcc/config/sparc/linux64.h

   1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
   2    Copyright 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
   3    Contributed by David S. Miller (davem@caip.rutgers.edu)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #define LINUX_DEFAULT_ELF
  23
  24 /* Don't assume anything about the header files.  */
  25 #define NO_IMPLICIT_EXTERN_C
  26
  27 #undef MD_EXEC_PREFIX
  28 #undef MD_STARTFILE_PREFIX
  29
  30 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  31 /* A 64 bit v9 compiler with stack-bias,
  32    in a Medium/Low code model environment.  */
  33
  34 #undef TARGET_DEFAULT
  35 #define TARGET_DEFAULT \
  36   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  37    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_EPILOGUE + MASK_FPU + MASK_LONG_DOUBLE_128)
  38 #endif
  39
  40 #undef ASM_CPU_DEFAULT_SPEC
  41 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  42
  43 #ifdef SPARC_BI_ARCH
  44
  45 #undef CPP_ARCH32_SPEC
  46 #define CPP_ARCH32_SPEC "%{mlong-double-128:-D__LONG_DOUBLE_128__} \
  47 -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int \
  48 -D__GCC_NEW_VARARGS__ -Acpu=sparc -Amachine=sparc"
  49
  50 #endif
  51
  52 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  53    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  54    provides part of the support for getting C++ file-scope static
  55    object constructed before entering `main'.  */
  56
  57 #undef  STARTFILE_SPEC
  58
  59 #define STARTFILE_SPEC32 \
  60   "%{!shared: \
  61      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  62    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  63
  64 #define STARTFILE_SPEC64 \
  65   "%{!shared: \
  66      %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} %{!p:/usr/lib64/crt1.o%s}}}\
  67    /usr/lib64/crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  68
  69 #ifdef SPARC_BI_ARCH
  70
  71 #if DEFAULT_ARCH32_P
  72 #define STARTFILE_SPEC "\
  73 %{m32:" STARTFILE_SPEC32 "} \
  74 %{m64:" STARTFILE_SPEC64 "} \
  75 %{!m32:%{!m64:" STARTFILE_SPEC32 "}}"
  76 #else
  77 #define STARTFILE_SPEC "\
  78 %{m32:" STARTFILE_SPEC32 "} \
  79 %{m64:" STARTFILE_SPEC64 "} \
  80 %{!m32:%{!m64:" STARTFILE_SPEC64 "}}"
  81 #endif
  82
  83 #else
  84
  85 #define STARTFILE_SPEC STARTFILE_SPEC64
  86
  87 #endif
  88
  89 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  90    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  91    provides part of the support for getting C++ file-scope static
  92    object constructed before entering `main', followed by a normal
  93    GNU/Linux "finalizer" file, `crtn.o'.  */
  94
  95 #undef  ENDFILE_SPEC
  96
  97 #define ENDFILE_SPEC32 \
  98   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  99
 100 #define ENDFILE_SPEC64 \
 101   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s"
 102
 103 #ifdef SPARC_BI_ARCH
 104
 105 #if DEFAULT_ARCH32_P
 106 #define ENDFILE_SPEC "\
 107 %{m32:" ENDFILE_SPEC32 "} \
 108 %{m64:" ENDFILE_SPEC64 "} \
 109 %{!m32:%{!m64:" ENDFILE_SPEC32 "}}"
 110 #else
 111 #define ENDFILE_SPEC "\
 112 %{m32:" ENDFILE_SPEC32 "} \
 113 %{m64:" ENDFILE_SPEC64 "} \
 114 %{!m32:%{!m64:" ENDFILE_SPEC64 "}}"
 115 #endif
 116
 117 #else
 118
 119 #define ENDFILE_SPEC ENDFILE_SPEC64
 120
 121 #endif
 122
 123 /* The GNU C++ standard library requires that these macros be defined.  */
 124 #undef CPLUSPLUS_CPP_SPEC
 125 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
 126
 127 #undef TARGET_VERSION
 128 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
 129
 130 /* The default code model.  */
 131 #undef SPARC_DEFAULT_CMODEL
 132 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
 133
 134 #undef SUBTARGET_SWITCHES
 135 #define SUBTARGET_SWITCHES                                                  \
 136 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") },  \
 137 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
 138
 139 #undef WCHAR_TYPE
 140 #define WCHAR_TYPE "int"
 141
 142 #undef WCHAR_TYPE_SIZE
 143 #define WCHAR_TYPE_SIZE 32
 144
 145 #undef MAX_WCHAR_TYPE_SIZE
 146
 147 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 148    Sparc ABI says that long double is 4 words.  */
 149 #undef LONG_DOUBLE_TYPE_SIZE
 150 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 151
 152 /* Constant which presents upper bound of the above value.  */
 153 #undef MAX_LONG_DOUBLE_TYPE_SIZE
 154 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 155
 156 /* Define this to set long double type size to use in libgcc2.c, which can
 157    not depend on target_flags.  */
 158 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 159 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 160 #else
 161 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 162 #endif
 163
 164 #undef CPP_PREDEFINES
 165 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D_LONGLONG -D__sparc__ -Dlinux -Asystem=unix -Asystem=posix"
 166
 167 #undef CPP_SUBTARGET_SPEC
 168 #define CPP_SUBTARGET_SPEC "\
 169 %{fPIC:-D__PIC__ -D__pic__} \
 170 %{fpic:-D__PIC__ -D__pic__} \
 171 %{posix:-D_POSIX_SOURCE} \
 172 %{pthread:-D_REENTRANT} \
 173 "
 174
 175 #undef LIB_SPEC
 176 #define LIB_SPEC \
 177   "%{shared: -lc} \
 178    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 179      %{profile:-lc_p} %{!profile: -lc}}"
 180
 181 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 182    for the special GCC options -static and -shared, which allow us to
 183    link things in one of these three modes by applying the appropriate
 184    combinations of options at link-time. We like to support here for
 185    as many of the other GNU linker options as possible. But I don't
 186    have the time to search for those flags. I am sure how to add
 187    support for -soname shared_object_name. H.J.
 188
 189    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 190    -Wl,-V.
 191
 192    When the -shared link option is used a final link is not being
 193    done.  */
 194
 195 /* If ELF is the default format, we should not use /lib/elf.  */
 196
 197 #ifdef SPARC_BI_ARCH
 198
 199 #undef SUBTARGET_EXTRA_SPECS
 200 #define SUBTARGET_EXTRA_SPECS \
 201   { "link_arch32",       LINK_ARCH32_SPEC },              \
 202   { "link_arch64",       LINK_ARCH64_SPEC },              \
 203   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 204   { "link_arch",         LINK_ARCH_SPEC },
 205
 206 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 207   %{!shared: \
 208     %{!ibcs: \
 209       %{!static: \
 210         %{rdynamic:-export-dynamic} \
 211         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 212         %{static:-static}}} \
 213 "
 214
 215 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 216   %{!shared: \
 217     %{!ibcs: \
 218       %{!static: \
 219         %{rdynamic:-export-dynamic} \
 220         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 221         %{static:-static}}} \
 222 "
 223
 224 #define LINK_ARCH_SPEC "\
 225 %{m32:%(link_arch32)} \
 226 %{m64:%(link_arch64)} \
 227 %{!m32:%{!m64:%(link_arch_default)}} \
 228 "
 229
 230 #define LINK_ARCH_DEFAULT_SPEC \
 231 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 232
 233 #undef  LINK_SPEC
 234 #define LINK_SPEC "\
 235 %(link_arch) \
 236 %{mlittle-endian:-EL} \
 237 %{!mno-relax:%{!r:-relax}} \
 238 "
 239
 240 #undef  CC1_SPEC
 241 #if DEFAULT_ARCH32_P
 242 #define CC1_SPEC "\
 243 %{sun4:} %{target:} \
 244 %{mcypress:-mcpu=cypress} \
 245 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 246 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 247 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 248   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 249   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 250 %{!m64:%{g*:%{!gs*:%{!gd*:%{!gx*:%{!gc*:-gstabs+}}}}}} \
 251 "
 252 #else
 253 #define CC1_SPEC "\
 254 %{sun4:} %{target:} \
 255 %{mcypress:-mcpu=cypress} \
 256 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 257 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 258 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 259   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}} \
 260   %{g*:%{!gs*:%{!gd*:%{!gx*:%{!gc*:-gstabs+}}}}}} \
 261 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 262 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 263 "
 264 #endif
 265
 266 #if DEFAULT_ARCH32_P
 267 #define MULTILIB_DEFAULTS { "m32" }
 268 #else
 269 #define MULTILIB_DEFAULTS { "m64" }
 270 #endif
 271
 272 #else /* !SPARC_BI_ARCH */
 273
 274 #undef LINK_SPEC
 275 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 276   %{!shared: \
 277     %{!ibcs: \
 278       %{!static: \
 279         %{rdynamic:-export-dynamic} \
 280         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 281         %{static:-static}}} \
 282 %{mlittle-endian:-EL} \
 283 %{!mno-relax:%{!r:-relax}} \
 284 "
 285
 286 #endif /* !SPARC_BI_ARCH */
 287
 288 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 289    It's safe to pass -s always, even if -g is not used.  */
 290 #undef ASM_SPEC
 291 #define ASM_SPEC "\
 292 %{V} \
 293 %{v:%{!V:-V}} \
 294 %{!Qn:-Qy} \
 295 %{n} \
 296 %{T} \
 297 %{Ym,*} \
 298 %{Wa,*:%*} \
 299 -s %{fpic:-K PIC} %{fPIC:-K PIC} \
 300 %{mlittle-endian:-EL} \
 301 %(asm_cpu) %(asm_arch) %(asm_relax)"
 302
 303 /* Same as sparc.h */
 304 #undef DBX_REGISTER_NUMBER
 305 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 306
 307 /* System V Release 4 uses DWARF debugging info.  Buf DWARF1 doesn't do
 308    64-bit anything, so we use DWARF2.  */
 309
 310 #undef DWARF2_DEBUGGING_INFO
 311 #undef DWARF_DEBUGGING_INFO
 312 #undef DBX_DEBUGGING_INFO
 313 #define DWARF2_DEBUGGING_INFO
 314 #define DBX_DEBUGGING_INFO
 315
 316 #undef PREFERRED_DEBUGGING_TYPE
 317 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 318
 319 #undef ASM_OUTPUT_ALIGNED_LOCAL
 320 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 321 do {                                                                    \
 322   fputs ("\t.local\t", (FILE));         \
 323   assemble_name ((FILE), (NAME));                                       \
 324   putc ('\n', (FILE));                                                  \
 325   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 326 } while (0)
 327
 328 #undef COMMON_ASM_OP
 329 #define COMMON_ASM_OP "\t.common\t"
 330
 331 /* This is how to output a definition of an internal numbered label where
 332    PREFIX is the class of label and NUM is the number within the class.  */
 333
 334 #undef  ASM_OUTPUT_INTERNAL_LABEL
 335 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 336   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 337
 338 /* This is how to output a reference to an internal numbered label where
 339    PREFIX is the class of label and NUM is the number within the class.  */
 340
 341 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 342 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 343   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 344
 345 /* This is how to store into the string LABEL
 346    the symbol_ref name of an internal numbered label where
 347    PREFIX is the class of label and NUM is the number within the class.
 348    This is suitable for output with `assemble_name'.  */
 349
 350 #undef  ASM_GENERATE_INTERNAL_LABEL
 351 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 352   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 353
 354 /* Define the names of various pseudo-ops used by the Sparc/svr4 assembler.
 355    ??? If ints are 64 bits then UNALIGNED_INT_ASM_OP (defined elsewhere) is
 356    misnamed.  These should all refer to explicit sizes (half/word/xword?),
 357    anything other than short/int/long/etc.  */
 358
 359 #undef  UNALIGNED_DOUBLE_INT_ASM_OP
 360 #define UNALIGNED_DOUBLE_INT_ASM_OP     "\t.uaxword\t"
 361
 362 /* DWARF bits.  */
 363
 364 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 365    Obviously the Dwarf2 folks havn't tried to actually build systems
 366    with their spec.  On a 64-bit system, only 64-bit relocs become
 367    RELATIVE relocations.  */
 368
 369 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 370 \f
 371 #if TARGET_ARCH32
 372 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 373    traps available which can get and set the condition codes
 374    reliably.  */
 375 #undef MACHINE_STATE_SAVE
 376 #define MACHINE_STATE_SAVE(ID)                          \
 377   unsigned long int ms_flags, ms_saveret;               \
 378   asm volatile("ta      0x20\n\t"                       \
 379                "mov     %%g1, %0\n\t"                   \
 380                "mov     %%g2, %1\n\t"                   \
 381                : "=r" (ms_flags), "=r" (ms_saveret));
 382
 383 #undef MACHINE_STATE_RESTORE
 384 #define MACHINE_STATE_RESTORE(ID)                       \
 385   asm volatile("mov     %0, %%g1\n\t"                   \
 386                "mov     %1, %%g2\n\t"                   \
 387                "ta      0x21\n\t"                       \
 388                : /* no outputs */                       \
 389                : "r" (ms_flags), "r" (ms_saveret));
 390 #endif /* sparc32 */