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 /* 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|fpic|fPIE|fpie:-D__PIC__ -D__pic__} \
 128 %{posix:-D_POSIX_SOURCE} \
 129 %{pthread:-D_REENTRANT} \
 130 "
 131
 132 #undef LIB_SPEC
 133 #define LIB_SPEC \
 134   "%{pthread:-lpthread} \
 135    %{shared:-lc} \
 136    %{!shared: %{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 137
 138 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 139    for the special GCC options -static and -shared, which allow us to
 140    link things in one of these three modes by applying the appropriate
 141    combinations of options at link-time. We like to support here for
 142    as many of the other GNU linker options as possible. But I don't
 143    have the time to search for those flags. I am sure how to add
 144    support for -soname shared_object_name. H.J.
 145
 146    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 147    -Wl,-V.
 148
 149    When the -shared link option is used a final link is not being
 150    done.  */
 151
 152 /* If ELF is the default format, we should not use /lib/elf.  */
 153
 154 #ifdef SPARC_BI_ARCH
 155
 156 #undef SUBTARGET_EXTRA_SPECS
 157 #define SUBTARGET_EXTRA_SPECS \
 158   { "link_arch32",       LINK_ARCH32_SPEC },              \
 159   { "link_arch64",       LINK_ARCH64_SPEC },              \
 160   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 161   { "link_arch",         LINK_ARCH_SPEC },
 162
 163 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 164   %{!shared: \
 165     %{!ibcs: \
 166       %{!static: \
 167         %{rdynamic:-export-dynamic} \
 168         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 169         %{static:-static}}} \
 170 "
 171
 172 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 173   %{!shared: \
 174     %{!ibcs: \
 175       %{!static: \
 176         %{rdynamic:-export-dynamic} \
 177         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 178         %{static:-static}}} \
 179 "
 180
 181 #define LINK_ARCH_SPEC "\
 182 %{m32:%(link_arch32)} \
 183 %{m64:%(link_arch64)} \
 184 %{!m32:%{!m64:%(link_arch_default)}} \
 185 "
 186
 187 #define LINK_ARCH_DEFAULT_SPEC \
 188 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 189
 190 #undef  LINK_SPEC
 191 #define LINK_SPEC "\
 192 %(link_arch) \
 193 %{mlittle-endian:-EL} \
 194 %{!mno-relax:%{!r:-relax}} \
 195 "
 196
 197 #undef  CC1_SPEC
 198 #if DEFAULT_ARCH32_P
 199 #define CC1_SPEC "\
 200 %{sun4:} %{target:} \
 201 %{mcypress:-mcpu=cypress} \
 202 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 203 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 204 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 205 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 206   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 207   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 208 "
 209 #else
 210 #define CC1_SPEC "\
 211 %{sun4:} %{target:} \
 212 %{mcypress:-mcpu=cypress} \
 213 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 214 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 215 %{m32:%{m64:%emay not use both -m32 and -m64}} \
 216 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 217   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}}} \
 218 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 219 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 220 "
 221 #endif
 222
 223 #if DEFAULT_ARCH32_P
 224 #define MULTILIB_DEFAULTS { "m32" }
 225 #else
 226 #define MULTILIB_DEFAULTS { "m64" }
 227 #endif
 228
 229 #else /* !SPARC_BI_ARCH */
 230
 231 #undef LINK_SPEC
 232 #define LINK_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 233   %{!shared: \
 234     %{!ibcs: \
 235       %{!static: \
 236         %{rdynamic:-export-dynamic} \
 237         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 238         %{static:-static}}} \
 239 %{mlittle-endian:-EL} \
 240 %{!mno-relax:%{!r:-relax}} \
 241 "
 242
 243 #endif /* !SPARC_BI_ARCH */
 244
 245 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 246    It's safe to pass -s always, even if -g is not used.  */
 247 #undef ASM_SPEC
 248 #define ASM_SPEC "\
 249 %{V} \
 250 %{v:%{!V:-V}} \
 251 %{!Qn:-Qy} \
 252 %{n} \
 253 %{T} \
 254 %{Ym,*} \
 255 %{Wa,*:%*} \
 256 -s %{fpic|fPIC|fpie|fPIE:-K PIC} \
 257 %{mlittle-endian:-EL} \
 258 %(asm_cpu) %(asm_arch) %(asm_relax)"
 259
 260 /* Same as sparc.h */
 261 #undef DBX_REGISTER_NUMBER
 262 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 263
 264 #define DWARF2_DEBUGGING_INFO 1
 265 #define DBX_DEBUGGING_INFO 1
 266
 267 #undef ASM_OUTPUT_ALIGNED_LOCAL
 268 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 269 do {                                                                    \
 270   fputs ("\t.local\t", (FILE));         \
 271   assemble_name ((FILE), (NAME));                                       \
 272   putc ('\n', (FILE));                                                  \
 273   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 274 } while (0)
 275
 276 #undef COMMON_ASM_OP
 277 #define COMMON_ASM_OP "\t.common\t"
 278
 279 #undef  LOCAL_LABEL_PREFIX
 280 #define LOCAL_LABEL_PREFIX  "."
 281
 282 /* This is how to output a reference to an internal numbered label where
 283    PREFIX is the class of label and NUM is the number within the class.  */
 284
 285 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 286 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 287   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 288
 289 /* This is how to store into the string LABEL
 290    the symbol_ref name of an internal numbered label where
 291    PREFIX is the class of label and NUM is the number within the class.
 292    This is suitable for output with `assemble_name'.  */
 293
 294 #undef  ASM_GENERATE_INTERNAL_LABEL
 295 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 296   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 297
 298 /* DWARF bits.  */
 299
 300 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 301    Obviously the Dwarf2 folks haven't tried to actually build systems
 302    with their spec.  On a 64-bit system, only 64-bit relocs become
 303    RELATIVE relocations.  */
 304
 305 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 306
 307 #if defined(HAVE_LD_EH_FRAME_HDR)
 308 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 309 #endif
 310 \f
 311 #ifdef HAVE_AS_TLS
 312 #undef TARGET_SUN_TLS
 313 #undef TARGET_GNU_TLS
 314 #define TARGET_SUN_TLS 0
 315 #define TARGET_GNU_TLS 1
 316 #endif
 317 \f
 318 /* Don't be different from other Linux platforms in this regard.  */
 319 #define HANDLE_PRAGMA_PACK_PUSH_POP
 320
 321 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 322 #undef CTORS_SECTION_ASM_OP
 323 #undef DTORS_SECTION_ASM_OP
 324
 325 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 326
 327 #undef LINK_GCC_C_SEQUENCE_SPEC
 328 #define LINK_GCC_C_SEQUENCE_SPEC \
 329   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 330
 331 /* Do code reading to identify a signal frame, and set the frame
 332    state data appropriately.  See unwind-dw2.c for the structs.  */
 333
 334 /* Handle multilib correctly.  */
 335 #if defined(__arch64__)
 336 /* 64-bit SPARC version */
 337 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 338   do {                                                                  \
 339     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 340     long new_cfa_, i_;                                                  \
 341     long regs_off_, fpu_save_off_;                                      \
 342     long this_cfa_, fpu_save_;                                          \
 343                                                                         \
 344     if (pc_[0] != 0x82102065            /* mov NR_rt_sigreturn, %g1 */  \
 345         || pc_[1] != 0x91d0206d)                /* ta 0x6d */           \
 346       break;                                                            \
 347     regs_off_ = 192 + 128;                                              \
 348     fpu_save_off_ = regs_off_ + (16 * 8) + (3 * 8) + (2 * 4);           \
 349     this_cfa_ = (long) (CONTEXT)->cfa;                                  \
 350     new_cfa_ = *(long *)(((CONTEXT)->cfa) + (regs_off_ + (14 * 8)));    \
 351     new_cfa_ += 2047; /* Stack bias */                                  \
 352     fpu_save_ = *(long *)((this_cfa_) + (fpu_save_off_));               \
 353     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 354     (FS)->cfa_reg = 14;                                                 \
 355     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 356     for (i_ = 1; i_ < 16; ++i_)                                         \
 357       {                                                                 \
 358         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 359         (FS)->regs.reg[i_].loc.offset =                                 \
 360           this_cfa_ + (regs_off_ + (i_ * 8)) - new_cfa_;                \
 361       }                                                                 \
 362     for (i_ = 0; i_ < 16; ++i_)                                         \
 363       {                                                                 \
 364         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 365         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 366           this_cfa_ + (i_ * 8) - new_cfa_;                              \
 367       }                                                                 \
 368     if (fpu_save_)                                                      \
 369       {                                                                 \
 370         for (i_ = 0; i_ < 64; ++i_)                                     \
 371           {                                                             \
 372             if (i_ > 32 && (i_ & 0x1))                                  \
 373               continue;                                                 \
 374             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 375             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 376               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 377           }                                                             \
 378       }                                                                 \
 379     /* Stick return address into %g0, same trick Alpha uses.  */        \
 380     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 381     (FS)->regs.reg[0].loc.offset =                                      \
 382       this_cfa_ + (regs_off_ + (16 * 8) + 8) - new_cfa_;                \
 383     (FS)->retaddr_column = 0;                                           \
 384     goto SUCCESS;                                                       \
 385   } while (0)
 386 #else
 387 /* 32-bit SPARC version */
 388 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 389   do {                                                                  \
 390     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 391     int new_cfa_, i_, oldstyle_;                                        \
 392     int regs_off_, fpu_save_off_;                                       \
 393     int fpu_save_, this_cfa_;                                           \
 394                                                                         \
 395     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 396       break;                                                            \
 397     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 398       oldstyle_ = 1;                                                    \
 399     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 400       oldstyle_ = 0;                                                    \
 401     else                                                                \
 402       break;                                                            \
 403     if (oldstyle_)                                                      \
 404       {                                                                 \
 405         regs_off_ = 96;                                                 \
 406         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 407       }                                                                 \
 408     else                                                                \
 409       {                                                                 \
 410         regs_off_ = 96 + 128;                                           \
 411         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 412       }                                                                 \
 413     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 414     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 415     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 416     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 417     (FS)->cfa_reg = 14;                                                 \
 418     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 419     for (i_ = 1; i_ < 16; ++i_)                                         \
 420       {                                                                 \
 421         if (i_ == 14)                                                   \
 422           continue;                                                     \
 423         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 424         (FS)->regs.reg[i_].loc.offset =                                 \
 425            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 426       }                                                                 \
 427     for (i_ = 0; i_ < 16; ++i_)                                         \
 428       {                                                                 \
 429         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 430         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 431           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 432       }                                                                 \
 433     if (fpu_save_)                                                      \
 434       {                                                                 \
 435         for (i_ = 0; i_ < 32; ++i_)                                     \
 436           {                                                             \
 437             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 438             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 439               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 440           }                                                             \
 441       }                                                                 \
 442     /* Stick return address into %g0, same trick Alpha uses.  */        \
 443     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 444     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 445     (FS)->retaddr_column = 0;                                           \
 446     goto SUCCESS;                                                       \
 447   } while (0)
 448 #endif