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