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 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 TARGET_OS_CPP_BUILTINS()                \
  23   do                                            \
  24     {                                           \
  25         builtin_define_std ("unix");            \
  26         builtin_define_std ("linux");           \
  27         builtin_define ("_LONGLONG");           \
  28         builtin_define ("__gnu_linux__");       \
  29         builtin_assert ("system=unix");         \
  30         builtin_assert ("system=posix");        \
  31     }                                           \
  32   while (0)
  33
  34 #define LINUX_DEFAULT_ELF
  35
  36 /* Don't assume anything about the header files.  */
  37 #define NO_IMPLICIT_EXTERN_C
  38
  39 #undef MD_EXEC_PREFIX
  40 #undef MD_STARTFILE_PREFIX
  41
  42 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  43 /* A 64 bit v9 compiler with stack-bias,
  44    in a Medium/Low code model environment.  */
  45
  46 #undef TARGET_DEFAULT
  47 #define TARGET_DEFAULT \
  48   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  49    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  50 #endif
  51
  52 #undef ASM_CPU_DEFAULT_SPEC
  53 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  54
  55 #ifdef SPARC_BI_ARCH
  56
  57 #undef CPP_ARCH32_SPEC
  58 #define CPP_ARCH32_SPEC "%{mlong-double-128:-D__LONG_DOUBLE_128__}"
  59
  60 #endif
  61
  62 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  63    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  64    provides part of the support for getting C++ file-scope static
  65    object constructed before entering `main'.  */
  66
  67 #undef  STARTFILE_SPEC
  68
  69 #define STARTFILE_SPEC \
  70   "%{!shared:%{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  71    crti.o%s %{static:crtbeginT.o%s}\
  72    %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
  73
  74 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  75    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  76    provides part of the support for getting C++ file-scope static
  77    object constructed before entering `main', followed by a normal
  78    GNU/Linux "finalizer" file, `crtn.o'.  */
  79
  80 #undef  ENDFILE_SPEC
  81
  82 #define ENDFILE_SPEC \
  83   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s\
  84    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  85
  86 /* The GNU C++ standard library requires that these macros be defined.  */
  87 #undef CPLUSPLUS_CPP_SPEC
  88 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  89
  90 #undef TARGET_VERSION
  91 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  92
  93 /* The default code model.  */
  94 #undef SPARC_DEFAULT_CMODEL
  95 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  96
  97 #undef SUBTARGET_SWITCHES
  98 #define SUBTARGET_SWITCHES                                                  \
  99 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") },  \
 100 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
 101
 102 #undef WCHAR_TYPE
 103 #define WCHAR_TYPE "int"
 104
 105 #undef WCHAR_TYPE_SIZE
 106 #define WCHAR_TYPE_SIZE 32
 107
 108 /* Define for support of TFmode long double.
 109    SPARC ABI says that long double is 4 words.  */
 110 #undef LONG_DOUBLE_TYPE_SIZE
 111 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 112
 113 /* Constant which presents upper bound of the above value.  */
 114 #undef MAX_LONG_DOUBLE_TYPE_SIZE
 115 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 116
 117 /* Define this to set long double type size to use in libgcc2.c, which can
 118    not depend on target_flags.  */
 119 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 120 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 121 #else
 122 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 123 #endif
 124
 125 #undef CPP_SUBTARGET_SPEC
 126 #define CPP_SUBTARGET_SPEC "\
 127 %{fPIC:-D__PIC__ -D__pic__} \
 128 %{fpic:-D__PIC__ -D__pic__} \
 129 %{posix:-D_POSIX_SOURCE} \
 130 %{pthread:-D_REENTRANT} \
 131 "
 132
 133 #undef LIB_SPEC
 134 #define LIB_SPEC \
 135   "%{pthread:-lpthread} \
 136    %{shared:-lc} \
 137    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 138
 139 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 140    for the special GCC options -static and -shared, which allow us to
 141    link things in one of these three modes by applying the appropriate
 142    combinations of options at link-time. We like to support here for
 143    as many of the other GNU linker options as possible. But I don't
 144    have the time to search for those flags. I am sure how to add
 145    support for -soname shared_object_name. H.J.
 146
 147    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 148    -Wl,-V.
 149
 150    When the -shared link option is used a final link is not being
 151    done.  */
 152
 153 /* If ELF is the default format, we should not use /lib/elf.  */
 154
 155 #ifdef SPARC_BI_ARCH
 156
 157 #undef SUBTARGET_EXTRA_SPECS
 158 #define SUBTARGET_EXTRA_SPECS \
 159   { "link_arch32",       LINK_ARCH32_SPEC },              \
 160   { "link_arch64",       LINK_ARCH64_SPEC },              \
 161   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 162   { "link_arch",         LINK_ARCH_SPEC },
 163
 164 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 165   %{!shared: \
 166     %{!ibcs: \
 167       %{!static: \
 168         %{rdynamic:-export-dynamic} \
 169         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 170         %{static:-static}}} \
 171 "
 172
 173 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 174   %{!shared: \
 175     %{!ibcs: \
 176       %{!static: \
 177         %{rdynamic:-export-dynamic} \
 178         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 179         %{static:-static}}} \
 180 "
 181
 182 #define LINK_ARCH_SPEC "\
 183 %{m32:%(link_arch32)} \
 184 %{m64:%(link_arch64)} \
 185 %{!m32:%{!m64:%(link_arch_default)}} \
 186 "
 187
 188 #define LINK_ARCH_DEFAULT_SPEC \
 189 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 190
 191 #undef  LINK_SPEC
 192 #define LINK_SPEC "\
 193 %(link_arch) \
 194 %{mlittle-endian:-EL} \
 195 %{!mno-relax:%{!r:-relax}} \
 196 "
 197
 198 #undef  CC1_SPEC
 199 #if DEFAULT_ARCH32_P
 200 #define CC1_SPEC "\
 201 %{sun4:} %{target:} \
 202 %{mcypress:-mcpu=cypress} \
 203 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 204 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 205 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 206 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 207   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 208   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 209 "
 210 #else
 211 #define CC1_SPEC "\
 212 %{sun4:} %{target:} \
 213 %{mcypress:-mcpu=cypress} \
 214 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 215 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 216 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 217 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 218   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 219 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 220 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 221 "
 222 #endif
 223
 224 #if DEFAULT_ARCH32_P
 225 #define MULTILIB_DEFAULTS { "m32" }
 226 #else
 227 #define MULTILIB_DEFAULTS { "m64" }
 228 #endif
 229
 230 #else /* !SPARC_BI_ARCH */
 231
 232 #undef LINK_SPEC
 233 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 234   %{!shared: \
 235     %{!ibcs: \
 236       %{!static: \
 237         %{rdynamic:-export-dynamic} \
 238         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 239         %{static:-static}}} \
 240 %{mlittle-endian:-EL} \
 241 %{!mno-relax:%{!r:-relax}} \
 242 "
 243
 244 #endif /* !SPARC_BI_ARCH */
 245
 246 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 247    It's safe to pass -s always, even if -g is not used.  */
 248 #undef ASM_SPEC
 249 #define ASM_SPEC "\
 250 %{V} \
 251 %{v:%{!V:-V}} \
 252 %{!Qn:-Qy} \
 253 %{n} \
 254 %{T} \
 255 %{Ym,*} \
 256 %{Wa,*:%*} \
 257 -s %{fpic:-K PIC} %{fPIC:-K PIC} \
 258 %{mlittle-endian:-EL} \
 259 %(asm_cpu) %(asm_arch) %(asm_relax)"
 260
 261 /* Same as sparc.h */
 262 #undef DBX_REGISTER_NUMBER
 263 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 264
 265 /* System V Release 4 uses DWARF debugging info.  Buf DWARF1 doesn't do
 266    64-bit anything, so we use DWARF2.  */
 267
 268 #undef DWARF_DEBUGGING_INFO
 269 #define DWARF2_DEBUGGING_INFO 1
 270 #define DBX_DEBUGGING_INFO 1
 271
 272 #undef ASM_OUTPUT_ALIGNED_LOCAL
 273 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 274 do {                                                                    \
 275   fputs ("\t.local\t", (FILE));         \
 276   assemble_name ((FILE), (NAME));                                       \
 277   putc ('\n', (FILE));                                                  \
 278   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 279 } while (0)
 280
 281 #undef COMMON_ASM_OP
 282 #define COMMON_ASM_OP "\t.common\t"
 283
 284 #undef  LOCAL_LABEL_PREFIX
 285 #define LOCAL_LABEL_PREFIX  "."
 286
 287 /* This is how to output a reference to an internal numbered label where
 288    PREFIX is the class of label and NUM is the number within the class.  */
 289
 290 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 291 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 292   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 293
 294 /* This is how to store into the string LABEL
 295    the symbol_ref name of an internal numbered label where
 296    PREFIX is the class of label and NUM is the number within the class.
 297    This is suitable for output with `assemble_name'.  */
 298
 299 #undef  ASM_GENERATE_INTERNAL_LABEL
 300 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 301   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 302
 303 /* DWARF bits.  */
 304
 305 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 306    Obviously the Dwarf2 folks haven't tried to actually build systems
 307    with their spec.  On a 64-bit system, only 64-bit relocs become
 308    RELATIVE relocations.  */
 309
 310 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 311
 312 #if defined(HAVE_LD_EH_FRAME_HDR)
 313 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 314 #endif
 315 \f
 316 /* Don't be different from other Linux platforms in this regard.  */
 317 #define HANDLE_PRAGMA_PACK_PUSH_POP
 318
 319 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 320 #undef CTORS_SECTION_ASM_OP
 321 #undef DTORS_SECTION_ASM_OP
 322
 323 /* Do code reading to identify a signal frame, and set the frame
 324    state data appropriately.  See unwind-dw2.c for the structs.  */
 325
 326 /* Handle multilib correctly.  */
 327 #if defined(__arch64__)
 328 /* 64-bit SPARC version */
 329 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 330   do {                                                                  \
 331     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 332     long new_cfa_, i_;                                                  \
 333     long regs_off_, fpu_save_off_;                                      \
 334     long this_cfa_, fpu_save_;                                          \
 335                                                                         \
 336     if (pc_[0] != 0x82102065            /* mov NR_rt_sigreturn, %g1 */  \
 337         || pc_[1] != 0x91d0206d)                /* ta 0x6d */           \
 338       break;                                                            \
 339     regs_off_ = 192 + 128;                                              \
 340     fpu_save_off_ = regs_off_ + (16 * 8) + (3 * 8) + (2 * 4);           \
 341     this_cfa_ = (long) (CONTEXT)->cfa;                                  \
 342     new_cfa_ = *(long *)(((CONTEXT)->cfa) + (regs_off_ + (14 * 8)));    \
 343     new_cfa_ += 2047; /* Stack bias */                                  \
 344     fpu_save_ = *(long *)((this_cfa_) + (fpu_save_off_));               \
 345     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 346     (FS)->cfa_reg = 14;                                                 \
 347     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 348     for (i_ = 1; i_ < 16; ++i_)                                         \
 349       {                                                                 \
 350         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 351         (FS)->regs.reg[i_].loc.offset =                                 \
 352           this_cfa_ + (regs_off_ + (i_ * 8)) - new_cfa_;                \
 353       }                                                                 \
 354     for (i_ = 0; i_ < 16; ++i_)                                         \
 355       {                                                                 \
 356         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 357         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 358           this_cfa_ + (i_ * 8) - new_cfa_;                              \
 359       }                                                                 \
 360     if (fpu_save_)                                                      \
 361       {                                                                 \
 362         for (i_ = 0; i_ < 64; ++i_)                                     \
 363           {                                                             \
 364             if (i_ > 32 && (i_ & 0x1))                                  \
 365               continue;                                                 \
 366             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 367             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 368               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 369           }                                                             \
 370       }                                                                 \
 371     /* Stick return address into %g0, same trick Alpha uses.  */        \
 372     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 373     (FS)->regs.reg[0].loc.offset =                                      \
 374       this_cfa_ + (regs_off_ + (16 * 8) + 8) - new_cfa_;                \
 375     (FS)->retaddr_column = 0;                                           \
 376     goto SUCCESS;                                                       \
 377   } while (0)
 378 #else
 379 /* 32-bit SPARC version */
 380 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 381   do {                                                                  \
 382     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 383     int new_cfa_, i_, oldstyle_;                                        \
 384     int regs_off_, fpu_save_off_;                                       \
 385     int fpu_save_, this_cfa_;                                           \
 386                                                                         \
 387     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 388       break;                                                            \
 389     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 390       oldstyle_ = 1;                                                    \
 391     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 392       oldstyle_ = 0;                                                    \
 393     else                                                                \
 394       break;                                                            \
 395     if (oldstyle_)                                                      \
 396       {                                                                 \
 397         regs_off_ = 96;                                                 \
 398         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 399       }                                                                 \
 400     else                                                                \
 401       {                                                                 \
 402         regs_off_ = 96 + 128;                                           \
 403         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 404       }                                                                 \
 405     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 406     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 407     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 408     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 409     (FS)->cfa_reg = 14;                                                 \
 410     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 411     for (i_ = 1; i_ < 16; ++i_)                                         \
 412       {                                                                 \
 413         if (i_ == 14)                                                   \
 414           continue;                                                     \
 415         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 416         (FS)->regs.reg[i_].loc.offset =                                 \
 417            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 418       }                                                                 \
 419     for (i_ = 0; i_ < 16; ++i_)                                         \
 420       {                                                                 \
 421         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 422         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 423           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 424       }                                                                 \
 425     if (fpu_save_)                                                      \
 426       {                                                                 \
 427         for (i_ = 0; i_ < 32; ++i_)                                     \
 428           {                                                             \
 429             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 430             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 431               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 432           }                                                             \
 433       }                                                                 \
 434     /* Stick return address into %g0, same trick Alpha uses.  */        \
 435     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 436     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 437     (FS)->retaddr_column = 0;                                           \
 438     goto SUCCESS;                                                       \
 439   } while (0)
 440 #endif