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 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 2, 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 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=linux");        \
  30         builtin_assert ("system=unix");         \
  31         builtin_assert ("system=posix");        \
  32     }                                           \
  33   while (0)
  34
  35 /* Don't assume anything about the header files.  */
  36 #define NO_IMPLICIT_EXTERN_C
  37
  38 #undef MD_EXEC_PREFIX
  39 #undef MD_STARTFILE_PREFIX
  40
  41 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  42 /* A 64 bit v9 compiler with stack-bias,
  43    in a Medium/Low code model environment.  */
  44
  45 #undef TARGET_DEFAULT
  46 #define TARGET_DEFAULT \
  47   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  48    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  49 #endif
  50
  51 #undef ASM_CPU_DEFAULT_SPEC
  52 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  53
  54 #ifdef SPARC_BI_ARCH
  55
  56 #undef CPP_ARCH32_SPEC
  57 #define CPP_ARCH32_SPEC "%{mlong-double-128:-D__LONG_DOUBLE_128__}"
  58
  59 #endif
  60
  61 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  62    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  63    provides part of the support for getting C++ file-scope static
  64    object constructed before entering `main'.  */
  65
  66 #undef  STARTFILE_SPEC
  67
  68 #ifdef HAVE_LD_PIE
  69 #define STARTFILE_SPEC \
  70   "%{!shared:%{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  71    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  72 #else
  73 #define STARTFILE_SPEC \
  74   "%{!shared:%{pg|p:gcrt1.o%s;:crt1.o%s}}\
  75    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbeginS.o%s}"
  76 #endif
  77
  78 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  79    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  80    provides part of the support for getting C++ file-scope static
  81    object constructed before entering `main', followed by a normal
  82    GNU/Linux "finalizer" file, `crtn.o'.  */
  83
  84 #undef  ENDFILE_SPEC
  85
  86 #define ENDFILE_SPEC \
  87   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
  88    %{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  89
  90 /* The GNU C++ standard library requires that these macros be defined.  */
  91 #undef CPLUSPLUS_CPP_SPEC
  92 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  93
  94 #undef TARGET_VERSION
  95 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
  96
  97 /* The default code model.  */
  98 #undef SPARC_DEFAULT_CMODEL
  99 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
 100
 101 #undef SUBTARGET_SWITCHES
 102 #define SUBTARGET_SWITCHES                                                  \
 103 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") },  \
 104 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
 105
 106 #undef WCHAR_TYPE
 107 #define WCHAR_TYPE "int"
 108
 109 #undef WCHAR_TYPE_SIZE
 110 #define WCHAR_TYPE_SIZE 32
 111
 112 /* Define for support of TFmode long double.
 113    SPARC ABI says that long double is 4 words.  */
 114 #undef LONG_DOUBLE_TYPE_SIZE
 115 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 116
 117 /* Constant which presents upper bound of the above value.  */
 118 #undef MAX_LONG_DOUBLE_TYPE_SIZE
 119 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 120
 121 /* Define this to set long double type size to use in libgcc2.c, which can
 122    not depend on target_flags.  */
 123 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
 124 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 125 #else
 126 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 127 #endif
 128
 129 #undef CPP_SUBTARGET_SPEC
 130 #define CPP_SUBTARGET_SPEC "\
 131 %{fPIC|fpic|fPIE|fpie:-D__PIC__ -D__pic__} \
 132 %{posix:-D_POSIX_SOURCE} \
 133 %{pthread:-D_REENTRANT} \
 134 "
 135
 136 #undef LIB_SPEC
 137 #define LIB_SPEC \
 138   "%{pthread:-lpthread} \
 139    %{shared:-lc} \
 140    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 141
 142 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 143    for the special GCC options -static and -shared, which allow us to
 144    link things in one of these three modes by applying the appropriate
 145    combinations of options at link-time. We like to support here for
 146    as many of the other GNU linker options as possible. But I don't
 147    have the time to search for those flags. I am sure how to add
 148    support for -soname shared_object_name. H.J.
 149
 150    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 151    -Wl,-V.
 152
 153    When the -shared link option is used a final link is not being
 154    done.  */
 155
 156 /* If ELF is the default format, we should not use /lib/elf.  */
 157
 158 #ifdef SPARC_BI_ARCH
 159
 160 #undef SUBTARGET_EXTRA_SPECS
 161 #define SUBTARGET_EXTRA_SPECS \
 162   { "link_arch32",       LINK_ARCH32_SPEC },              \
 163   { "link_arch64",       LINK_ARCH64_SPEC },              \
 164   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 165   { "link_arch",         LINK_ARCH_SPEC },
 166
 167 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 168   %{!shared: \
 169     %{!ibcs: \
 170       %{!static: \
 171         %{rdynamic:-export-dynamic} \
 172         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 173         %{static:-static}}} \
 174 "
 175
 176 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 177   %{!shared: \
 178     %{!ibcs: \
 179       %{!static: \
 180         %{rdynamic:-export-dynamic} \
 181         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 182         %{static:-static}}} \
 183 "
 184
 185 #define LINK_ARCH_SPEC "\
 186 %{m32:%(link_arch32)} \
 187 %{m64:%(link_arch64)} \
 188 %{!m32:%{!m64:%(link_arch_default)}} \
 189 "
 190
 191 #define LINK_ARCH_DEFAULT_SPEC \
 192 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 193
 194 #undef  LINK_SPEC
 195 #define LINK_SPEC "\
 196 %(link_arch) \
 197 %{mlittle-endian:-EL} \
 198 %{!mno-relax:%{!r:-relax}} \
 199 "
 200
 201 #undef  CC1_SPEC
 202 #if DEFAULT_ARCH32_P
 203 #define CC1_SPEC "\
 204 %{sun4:} %{target:} \
 205 %{mcypress:-mcpu=cypress} \
 206 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 207 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 208 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 209 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 210   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 211   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 212 "
 213 #else
 214 #define CC1_SPEC "\
 215 %{sun4:} %{target:} \
 216 %{mcypress:-mcpu=cypress} \
 217 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 218 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 219 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 220 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 221   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 222 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 223 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 224 "
 225 #endif
 226
 227 #if DEFAULT_ARCH32_P
 228 #define MULTILIB_DEFAULTS { "m32" }
 229 #else
 230 #define MULTILIB_DEFAULTS { "m64" }
 231 #endif
 232
 233 #else /* !SPARC_BI_ARCH */
 234
 235 #undef LINK_SPEC
 236 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 237   %{!shared: \
 238     %{!ibcs: \
 239       %{!static: \
 240         %{rdynamic:-export-dynamic} \
 241         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 242         %{static:-static}}} \
 243 %{mlittle-endian:-EL} \
 244 %{!mno-relax:%{!r:-relax}} \
 245 "
 246
 247 #endif /* !SPARC_BI_ARCH */
 248
 249 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 250    It's safe to pass -s always, even if -g is not used.  */
 251 #undef ASM_SPEC
 252 #define ASM_SPEC "\
 253 %{V} \
 254 %{v:%{!V:-V}} \
 255 %{!Qn:-Qy} \
 256 %{n} \
 257 %{T} \
 258 %{Ym,*} \
 259 %{Wa,*:%*} \
 260 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 261 %{mlittle-endian:-EL} \
 262 %(asm_cpu) %(asm_arch) %(asm_relax)"
 263
 264 /* Same as sparc.h */
 265 #undef DBX_REGISTER_NUMBER
 266 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 267
 268 #define DWARF2_DEBUGGING_INFO 1
 269 #define DBX_DEBUGGING_INFO 1
 270
 271 #undef ASM_OUTPUT_ALIGNED_LOCAL
 272 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 273 do {                                                                    \
 274   fputs ("\t.local\t", (FILE));         \
 275   assemble_name ((FILE), (NAME));                                       \
 276   putc ('\n', (FILE));                                                  \
 277   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 278 } while (0)
 279
 280 #undef COMMON_ASM_OP
 281 #define COMMON_ASM_OP "\t.common\t"
 282
 283 #undef  LOCAL_LABEL_PREFIX
 284 #define LOCAL_LABEL_PREFIX  "."
 285
 286 /* This is how to output a reference to an internal numbered label where
 287    PREFIX is the class of label and NUM is the number within the class.  */
 288
 289 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 290 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 291   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 292
 293 /* This is how to store into the string LABEL
 294    the symbol_ref name of an internal numbered label where
 295    PREFIX is the class of label and NUM is the number within the class.
 296    This is suitable for output with `assemble_name'.  */
 297
 298 #undef  ASM_GENERATE_INTERNAL_LABEL
 299 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 300   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 301
 302 /* DWARF bits.  */
 303
 304 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 305    Obviously the Dwarf2 folks haven't tried to actually build systems
 306    with their spec.  On a 64-bit system, only 64-bit relocs become
 307    RELATIVE relocations.  */
 308
 309 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 310
 311 #if defined(HAVE_LD_EH_FRAME_HDR)
 312 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 313 #endif
 314 \f
 315 #ifdef HAVE_AS_TLS
 316 #undef TARGET_SUN_TLS
 317 #undef TARGET_GNU_TLS
 318 #define TARGET_SUN_TLS 0
 319 #define TARGET_GNU_TLS 1
 320 #endif
 321 \f
 322 /* Don't be different from other Linux platforms in this regard.  */
 323 #define HANDLE_PRAGMA_PACK_PUSH_POP
 324
 325 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 326 #undef CTORS_SECTION_ASM_OP
 327 #undef DTORS_SECTION_ASM_OP
 328
 329 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 330
 331 #undef LINK_GCC_C_SEQUENCE_SPEC
 332 #define LINK_GCC_C_SEQUENCE_SPEC \
 333   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 334
 335 /* Do code reading to identify a signal frame, and set the frame
 336    state data appropriately.  See unwind-dw2.c for the structs.  */
 337
 338 /* Handle multilib correctly.  */
 339 #if defined(__arch64__)
 340 /* 64-bit SPARC version */
 341 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 342   do {                                                                  \
 343     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 344     long new_cfa_, i_;                                                  \
 345     long regs_off_, fpu_save_off_;                                      \
 346     long this_cfa_, fpu_save_;                                          \
 347                                                                         \
 348     if (pc_[0] != 0x82102065            /* mov NR_rt_sigreturn, %g1 */  \
 349         || pc_[1] != 0x91d0206d)                /* ta 0x6d */           \
 350       break;                                                            \
 351     regs_off_ = 192 + 128;                                              \
 352     fpu_save_off_ = regs_off_ + (16 * 8) + (3 * 8) + (2 * 4);           \
 353     this_cfa_ = (long) (CONTEXT)->cfa;                                  \
 354     new_cfa_ = *(long *)(((CONTEXT)->cfa) + (regs_off_ + (14 * 8)));    \
 355     new_cfa_ += 2047; /* Stack bias */                                  \
 356     fpu_save_ = *(long *)((this_cfa_) + (fpu_save_off_));               \
 357     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 358     (FS)->cfa_reg = 14;                                                 \
 359     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 360     for (i_ = 1; i_ < 16; ++i_)                                         \
 361       {                                                                 \
 362         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 363         (FS)->regs.reg[i_].loc.offset =                                 \
 364           this_cfa_ + (regs_off_ + (i_ * 8)) - new_cfa_;                \
 365       }                                                                 \
 366     for (i_ = 0; i_ < 16; ++i_)                                         \
 367       {                                                                 \
 368         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 369         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 370           this_cfa_ + (i_ * 8) - new_cfa_;                              \
 371       }                                                                 \
 372     if (fpu_save_)                                                      \
 373       {                                                                 \
 374         for (i_ = 0; i_ < 64; ++i_)                                     \
 375           {                                                             \
 376             if (i_ > 32 && (i_ & 0x1))                                  \
 377               continue;                                                 \
 378             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 379             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 380               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 381           }                                                             \
 382       }                                                                 \
 383     /* Stick return address into %g0, same trick Alpha uses.  */        \
 384     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 385     (FS)->regs.reg[0].loc.offset =                                      \
 386       this_cfa_ + (regs_off_ + (16 * 8) + 8) - new_cfa_;                \
 387     (FS)->retaddr_column = 0;                                           \
 388     goto SUCCESS;                                                       \
 389   } while (0)
 390 #else
 391 /* 32-bit SPARC version */
 392 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 393   do {                                                                  \
 394     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 395     int new_cfa_, i_, oldstyle_;                                        \
 396     int regs_off_, fpu_save_off_;                                       \
 397     int fpu_save_, this_cfa_;                                           \
 398                                                                         \
 399     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 400       break;                                                            \
 401     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 402       oldstyle_ = 1;                                                    \
 403     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 404       oldstyle_ = 0;                                                    \
 405     else                                                                \
 406       break;                                                            \
 407     if (oldstyle_)                                                      \
 408       {                                                                 \
 409         regs_off_ = 96;                                                 \
 410         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 411       }                                                                 \
 412     else                                                                \
 413       {                                                                 \
 414         regs_off_ = 96 + 128;                                           \
 415         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 416       }                                                                 \
 417     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 418     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 419     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 420     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 421     (FS)->cfa_reg = 14;                                                 \
 422     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 423     for (i_ = 1; i_ < 16; ++i_)                                         \
 424       {                                                                 \
 425         if (i_ == 14)                                                   \
 426           continue;                                                     \
 427         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 428         (FS)->regs.reg[i_].loc.offset =                                 \
 429            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 430       }                                                                 \
 431     for (i_ = 0; i_ < 16; ++i_)                                         \
 432       {                                                                 \
 433         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 434         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 435           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 436       }                                                                 \
 437     if (fpu_save_)                                                      \
 438       {                                                                 \
 439         for (i_ = 0; i_ < 32; ++i_)                                     \
 440           {                                                             \
 441             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 442             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 443               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 444           }                                                             \
 445       }                                                                 \
 446     /* Stick return address into %g0, same trick Alpha uses.  */        \
 447     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 448     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 449     (FS)->retaddr_column = 0;                                           \
 450     goto SUCCESS;                                                       \
 451   } while (0)
 452 #endif