gcc/config/rs6000/sysv4.h

   1 /* Target definitions for GNU compiler for PowerPC running System V.4
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   3    2004, 2005 Free Software Foundation, Inc.
   4    Contributed by Cygnus Support.
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 2, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING.  If not, write to the
  20    Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 /* Header files should be C++ aware in general.  */
  24 #undef  NO_IMPLICIT_EXTERN_C
  25 #define NO_IMPLICIT_EXTERN_C
  26
  27 /* Yes!  We are ELF.  */
  28 #define TARGET_OBJECT_FORMAT OBJECT_ELF
  29
  30 /* Default ABI to compile code for.  */
  31 #define DEFAULT_ABI rs6000_current_abi
  32
  33 /* Default ABI to use.  */
  34 #define RS6000_ABI_NAME "sysv"
  35
  36 /* Override rs6000.h definition.  */
  37 #undef  ASM_DEFAULT_SPEC
  38 #define ASM_DEFAULT_SPEC "-mppc"
  39
  40 /* Small data support types.  */
  41 enum rs6000_sdata_type {
  42   SDATA_NONE,                   /* No small data support.  */
  43   SDATA_DATA,                   /* Just put data in .sbss/.sdata, don't use relocs.  */
  44   SDATA_SYSV,                   /* Use r13 to point to .sdata/.sbss.  */
  45   SDATA_EABI                    /* Use r13 like above, r2 points to .sdata2/.sbss2.  */
  46 };
  47
  48 extern enum rs6000_sdata_type rs6000_sdata;
  49
  50 #define TARGET_TOC              ((target_flags & MASK_64BIT)            \
  51                                  || ((target_flags & (MASK_RELOCATABLE  \
  52                                                       | MASK_MINIMAL_TOC)) \
  53                                      && flag_pic > 1)                   \
  54                                  || DEFAULT_ABI == ABI_AIX)
  55
  56 #define TARGET_BITFIELD_TYPE    (! TARGET_NO_BITFIELD_TYPE)
  57 #define TARGET_BIG_ENDIAN       (! TARGET_LITTLE_ENDIAN)
  58 #define TARGET_NO_PROTOTYPE     (! TARGET_PROTOTYPE)
  59 #define TARGET_NO_TOC           (! TARGET_TOC)
  60 #define TARGET_NO_EABI          (! TARGET_EABI)
  61
  62 #ifdef HAVE_AS_REL16
  63 #undef TARGET_SECURE_PLT
  64 #define TARGET_SECURE_PLT       secure_plt
  65 #endif
  66
  67 extern const char *rs6000_abi_name;
  68 extern const char *rs6000_sdata_name;
  69 extern const char *rs6000_tls_size_string; /* For -mtls-size= */
  70
  71 #define SDATA_DEFAULT_SIZE 8
  72
  73 /* Sometimes certain combinations of command options do not make sense
  74    on a particular target machine.  You can define a macro
  75    `OVERRIDE_OPTIONS' to take account of this.  This macro, if
  76    defined, is executed once just after all the command options have
  77    been parsed.
  78
  79    The macro SUBTARGET_OVERRIDE_OPTIONS is provided for subtargets, to
  80    get control.  */
  81
  82 #define SUBTARGET_OVERRIDE_OPTIONS                                      \
  83 do {                                                                    \
  84   if (!g_switch_set)                                                    \
  85     g_switch_value = SDATA_DEFAULT_SIZE;                                \
  86                                                                         \
  87   if (rs6000_abi_name == NULL)                                          \
  88     rs6000_abi_name = RS6000_ABI_NAME;                                  \
  89                                                                         \
  90   if (!strcmp (rs6000_abi_name, "sysv"))                                \
  91     rs6000_current_abi = ABI_V4;                                        \
  92   else if (!strcmp (rs6000_abi_name, "sysv-noeabi"))                    \
  93     {                                                                   \
  94       rs6000_current_abi = ABI_V4;                                      \
  95       target_flags &= ~ MASK_EABI;                                      \
  96     }                                                                   \
  97   else if (!strcmp (rs6000_abi_name, "sysv-eabi")                       \
  98            || !strcmp (rs6000_abi_name, "eabi"))                        \
  99     {                                                                   \
 100       rs6000_current_abi = ABI_V4;                                      \
 101       target_flags |= MASK_EABI;                                        \
 102     }                                                                   \
 103   else if (!strcmp (rs6000_abi_name, "aixdesc"))                        \
 104     rs6000_current_abi = ABI_AIX;                                       \
 105   else if (!strcmp (rs6000_abi_name, "freebsd"))                        \
 106     rs6000_current_abi = ABI_V4;                                        \
 107   else if (!strcmp (rs6000_abi_name, "linux"))                          \
 108     {                                                                   \
 109       if (TARGET_64BIT)                                                 \
 110         rs6000_current_abi = ABI_AIX;                                   \
 111       else                                                              \
 112         rs6000_current_abi = ABI_V4;                                    \
 113     }                                                                   \
 114   else if (!strcmp (rs6000_abi_name, "gnu"))                            \
 115     rs6000_current_abi = ABI_V4;                                        \
 116   else if (!strcmp (rs6000_abi_name, "netbsd"))                         \
 117     rs6000_current_abi = ABI_V4;                                        \
 118   else if (!strcmp (rs6000_abi_name, "openbsd"))                        \
 119     rs6000_current_abi = ABI_V4;                                        \
 120   else if (!strcmp (rs6000_abi_name, "i960-old"))                       \
 121     {                                                                   \
 122       rs6000_current_abi = ABI_V4;                                      \
 123       target_flags |= (MASK_LITTLE_ENDIAN | MASK_EABI                   \
 124                        | MASK_NO_BITFIELD_WORD);                        \
 125       target_flags &= ~MASK_STRICT_ALIGN;                               \
 126     }                                                                   \
 127   else                                                                  \
 128     {                                                                   \
 129       rs6000_current_abi = ABI_V4;                                      \
 130       error ("bad value for -mcall-%s", rs6000_abi_name);               \
 131     }                                                                   \
 132                                                                         \
 133   if (rs6000_sdata_name)                                                \
 134     {                                                                   \
 135       if (!strcmp (rs6000_sdata_name, "none"))                          \
 136         rs6000_sdata = SDATA_NONE;                                      \
 137       else if (!strcmp (rs6000_sdata_name, "data"))                     \
 138         rs6000_sdata = SDATA_DATA;                                      \
 139       else if (!strcmp (rs6000_sdata_name, "default"))                  \
 140         rs6000_sdata = (TARGET_EABI) ? SDATA_EABI : SDATA_SYSV;         \
 141       else if (!strcmp (rs6000_sdata_name, "sysv"))                     \
 142         rs6000_sdata = SDATA_SYSV;                                      \
 143       else if (!strcmp (rs6000_sdata_name, "eabi"))                     \
 144         rs6000_sdata = SDATA_EABI;                                      \
 145       else                                                              \
 146         error ("bad value for -msdata=%s", rs6000_sdata_name);          \
 147     }                                                                   \
 148   else if (DEFAULT_ABI == ABI_V4)                                       \
 149     {                                                                   \
 150       rs6000_sdata = SDATA_DATA;                                        \
 151       rs6000_sdata_name = "data";                                       \
 152     }                                                                   \
 153   else                                                                  \
 154     {                                                                   \
 155       rs6000_sdata = SDATA_NONE;                                        \
 156       rs6000_sdata_name = "none";                                       \
 157     }                                                                   \
 158                                                                         \
 159   if (TARGET_RELOCATABLE &&                                             \
 160       (rs6000_sdata == SDATA_EABI || rs6000_sdata == SDATA_SYSV))       \
 161     {                                                                   \
 162       rs6000_sdata = SDATA_DATA;                                        \
 163       error ("-mrelocatable and -msdata=%s are incompatible",           \
 164              rs6000_sdata_name);                                        \
 165     }                                                                   \
 166                                                                         \
 167   else if (flag_pic && DEFAULT_ABI != ABI_AIX                           \
 168            && (rs6000_sdata == SDATA_EABI                               \
 169                || rs6000_sdata == SDATA_SYSV))                          \
 170     {                                                                   \
 171       rs6000_sdata = SDATA_DATA;                                        \
 172       error ("-f%s and -msdata=%s are incompatible",                    \
 173              (flag_pic > 1) ? "PIC" : "pic",                            \
 174              rs6000_sdata_name);                                        \
 175     }                                                                   \
 176                                                                         \
 177   if ((rs6000_sdata != SDATA_NONE && DEFAULT_ABI != ABI_V4)             \
 178       || (rs6000_sdata == SDATA_EABI && !TARGET_EABI))                  \
 179     {                                                                   \
 180       rs6000_sdata = SDATA_NONE;                                        \
 181       error ("-msdata=%s and -mcall-%s are incompatible",               \
 182              rs6000_sdata_name, rs6000_abi_name);                       \
 183     }                                                                   \
 184                                                                         \
 185   targetm.have_srodata_section = rs6000_sdata == SDATA_EABI;            \
 186                                                                         \
 187   if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC)                        \
 188     {                                                                   \
 189       target_flags |= MASK_MINIMAL_TOC;                                 \
 190       error ("-mrelocatable and -mno-minimal-toc are incompatible");    \
 191     }                                                                   \
 192                                                                         \
 193   if (TARGET_RELOCATABLE && rs6000_current_abi == ABI_AIX)              \
 194     {                                                                   \
 195       target_flags &= ~MASK_RELOCATABLE;                                \
 196       error ("-mrelocatable and -mcall-%s are incompatible",            \
 197              rs6000_abi_name);                                          \
 198     }                                                                   \
 199                                                                         \
 200   if (!TARGET_64BIT && flag_pic > 1 && rs6000_current_abi == ABI_AIX)   \
 201     {                                                                   \
 202       flag_pic = 0;                                                     \
 203       error ("-fPIC and -mcall-%s are incompatible",                    \
 204              rs6000_abi_name);                                          \
 205     }                                                                   \
 206                                                                         \
 207   if (rs6000_current_abi == ABI_AIX && TARGET_LITTLE_ENDIAN)            \
 208     {                                                                   \
 209       target_flags &= ~MASK_LITTLE_ENDIAN;                              \
 210       error ("-mcall-aixdesc must be big endian");                      \
 211     }                                                                   \
 212                                                                         \
 213   if (TARGET_SECURE_PLT != secure_plt)                                  \
 214     {                                                                   \
 215       error ("-msecure-plt not supported by your assembler");           \
 216     }                                                                   \
 217                                                                         \
 218   /* Treat -fPIC the same as -mrelocatable.  */                         \
 219   if (flag_pic > 1 && DEFAULT_ABI != ABI_AIX)                           \
 220     target_flags |= MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC; \
 221                                                                         \
 222   else if (TARGET_RELOCATABLE)                                          \
 223     flag_pic = 2;                                                       \
 224 } while (0)
 225
 226 #ifndef RS6000_BI_ARCH
 227 # define SUBSUBTARGET_OVERRIDE_OPTIONS                                  \
 228 do {                                                                    \
 229   if ((TARGET_DEFAULT ^ target_flags) & MASK_64BIT)                     \
 230     error ("-m%s not supported in this configuration",                  \
 231            (target_flags & MASK_64BIT) ? "64" : "32");                  \
 232 } while (0)
 233 #endif
 234
 235 /* Override rs6000.h definition.  */
 236 #undef  TARGET_DEFAULT
 237 #define TARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS)
 238
 239 /* Override rs6000.h definition.  */
 240 #undef  PROCESSOR_DEFAULT
 241 #define PROCESSOR_DEFAULT PROCESSOR_PPC750
 242
 243 /* SVR4 only defined for PowerPC, so short-circuit POWER patterns.  */
 244 #undef  TARGET_POWER
 245 #define TARGET_POWER 0
 246
 247 #define FIXED_R2 1
 248 /* System V.4 uses register 13 as a pointer to the small data area,
 249    so it is not available to the normal user.  */
 250 #define FIXED_R13 1
 251
 252 /* Override default big endianism definitions in rs6000.h.  */
 253 #undef  BYTES_BIG_ENDIAN
 254 #undef  WORDS_BIG_ENDIAN
 255 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
 256 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
 257
 258 /* Define this to set the endianness to use in libgcc2.c, which can
 259    not depend on target_flags.  */
 260 #if !defined(__LITTLE_ENDIAN__) && !defined(__sun__)
 261 #define LIBGCC2_WORDS_BIG_ENDIAN 1
 262 #else
 263 #define LIBGCC2_WORDS_BIG_ENDIAN 0
 264 #endif
 265
 266 /* Define cutoff for using external functions to save floating point.
 267    Currently on V.4, always use inline stores.  */
 268 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
 269
 270 /* Put jump tables in read-only memory, rather than in .text.  */
 271 #define JUMP_TABLES_IN_TEXT_SECTION 0
 272
 273 /* Prefix and suffix to use to saving floating point.  */
 274 #define SAVE_FP_PREFIX "_savefpr_"
 275 #define SAVE_FP_SUFFIX "_l"
 276
 277 /* Prefix and suffix to use to restoring floating point.  */
 278 #define RESTORE_FP_PREFIX "_restfpr_"
 279 #define RESTORE_FP_SUFFIX "_l"
 280
 281 /* Type used for ptrdiff_t, as a string used in a declaration.  */
 282 #define PTRDIFF_TYPE "int"
 283
 284 /* Type used for wchar_t, as a string used in a declaration.  */
 285 /* Override svr4.h definition.  */
 286 #undef  WCHAR_TYPE
 287 #define WCHAR_TYPE "long int"
 288
 289 /* Width of wchar_t in bits.  */
 290 /* Override svr4.h definition.  */
 291 #undef  WCHAR_TYPE_SIZE
 292 #define WCHAR_TYPE_SIZE 32
 293
 294 /* Make int foo : 8 not cause structures to be aligned to an int boundary.  */
 295 /* Override elfos.h definition.  */
 296 #undef  PCC_BITFIELD_TYPE_MATTERS
 297 #define PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE)
 298
 299 #undef  BITFIELD_NBYTES_LIMITED
 300 #define BITFIELD_NBYTES_LIMITED (TARGET_NO_BITFIELD_WORD)
 301
 302 /* Define this macro to be the value 1 if instructions will fail to
 303    work if given data not on the nominal alignment.  If instructions
 304    will merely go slower in that case, define this macro as 0.  */
 305 #undef  STRICT_ALIGNMENT
 306 #define STRICT_ALIGNMENT (TARGET_STRICT_ALIGN)
 307
 308 /* Define this macro if you wish to preserve a certain alignment for
 309    the stack pointer, greater than what the hardware enforces.  The
 310    definition is a C expression for the desired alignment (measured
 311    in bits).  This macro must evaluate to a value equal to or larger
 312    than STACK_BOUNDARY.
 313    For the SYSV ABI and variants the alignment of the stack pointer
 314    is usually controlled manually in rs6000.c. However, to maintain
 315    alignment across alloca () in all circumstances,
 316    PREFERRED_STACK_BOUNDARY needs to be set as well.
 317    This has the additional advantage of allowing a bigger maximum
 318    alignment of user objects on the stack.  */
 319
 320 #undef PREFERRED_STACK_BOUNDARY
 321 #define PREFERRED_STACK_BOUNDARY 128
 322
 323 /* Real stack boundary as mandated by the appropriate ABI.  */
 324 #define ABI_STACK_BOUNDARY \
 325   ((TARGET_EABI && !TARGET_ALTIVEC && !TARGET_ALTIVEC_ABI) ? 64 : 128)
 326
 327 /* An expression for the alignment of a structure field FIELD if the
 328    alignment computed in the usual way is COMPUTED.  */
 329 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)                                   \
 330         ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE)     \
 331          ? 128 : COMPUTED)
 332
 333 #undef  BIGGEST_FIELD_ALIGNMENT
 334
 335 /* Use ELF style section commands.  */
 336
 337 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
 338
 339 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
 340
 341 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
 342
 343 /* Override elfos.h definition.  */
 344 #undef  INIT_SECTION_ASM_OP
 345 #define INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""
 346
 347 /* Override elfos.h definition.  */
 348 #undef  FINI_SECTION_ASM_OP
 349 #define FINI_SECTION_ASM_OP "\t.section\t\".fini\",\"ax\""
 350
 351 #define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
 352
 353 /* Put PC relative got entries in .got2.  */
 354 #define MINIMAL_TOC_SECTION_ASM_OP \
 355   (TARGET_RELOCATABLE || (flag_pic && DEFAULT_ABI != ABI_AIX)           \
 356    ? "\t.section\t\".got2\",\"aw\"" : "\t.section\t\".got1\",\"aw\"")
 357
 358 #define SDATA_SECTION_ASM_OP "\t.section\t\".sdata\",\"aw\""
 359 #define SDATA2_SECTION_ASM_OP "\t.section\t\".sdata2\",\"a\""
 360 #define SBSS_SECTION_ASM_OP "\t.section\t\".sbss\",\"aw\",@nobits"
 361
 362 /* Besides the usual ELF sections, we need a toc section.  */
 363 /* Override elfos.h definition.  */
 364 #undef  EXTRA_SECTIONS
 365 #define EXTRA_SECTIONS in_toc, in_sdata, in_sdata2, in_sbss, in_init, in_fini
 366
 367 /* Override elfos.h definition.  */
 368 #undef  EXTRA_SECTION_FUNCTIONS
 369 #define EXTRA_SECTION_FUNCTIONS                                         \
 370   TOC_SECTION_FUNCTION                                                  \
 371   SDATA_SECTION_FUNCTION                                                \
 372   SDATA2_SECTION_FUNCTION                                               \
 373   SBSS_SECTION_FUNCTION                                                 \
 374   INIT_SECTION_FUNCTION                                                 \
 375   FINI_SECTION_FUNCTION
 376
 377 #define TOC_SECTION_FUNCTION                                            \
 378 void                                                                    \
 379 toc_section (void)                                                      \
 380 {                                                                       \
 381   if (in_section != in_toc)                                             \
 382     {                                                                   \
 383       in_section = in_toc;                                              \
 384       if (DEFAULT_ABI == ABI_AIX                                        \
 385           && TARGET_MINIMAL_TOC                                         \
 386           && !TARGET_RELOCATABLE)                                       \
 387         {                                                               \
 388           if (! toc_initialized)                                        \
 389             {                                                           \
 390               toc_initialized = 1;                                      \
 391               fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);       \
 392               (*targetm.asm_out.internal_label) (asm_out_file, "LCTOC", 0); \
 393               fprintf (asm_out_file, "\t.tc ");                         \
 394               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
 395               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 396               fprintf (asm_out_file, "\n");                             \
 397                                                                         \
 398               fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
 399               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 400               fprintf (asm_out_file, " = .+32768\n");                   \
 401             }                                                           \
 402           else                                                          \
 403             fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
 404         }                                                               \
 405       else if (DEFAULT_ABI == ABI_AIX && !TARGET_RELOCATABLE)           \
 406         fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);             \
 407       else                                                              \
 408         {                                                               \
 409           fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP);   \
 410           if (! toc_initialized)                                        \
 411             {                                                           \
 412               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 413               fprintf (asm_out_file, " = .+32768\n");                   \
 414               toc_initialized = 1;                                      \
 415             }                                                           \
 416         }                                                               \
 417     }                                                                   \
 418 }                                                                       \
 419                                                                         \
 420 extern int in_toc_section (void);                                       \
 421 int in_toc_section (void)                                               \
 422 {                                                                       \
 423   return in_section == in_toc;                                          \
 424 }
 425
 426 #define SDATA_SECTION_FUNCTION                                          \
 427 void                                                                    \
 428 sdata_section (void)                                                    \
 429 {                                                                       \
 430   if (in_section != in_sdata)                                           \
 431     {                                                                   \
 432       in_section = in_sdata;                                            \
 433       fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);             \
 434     }                                                                   \
 435 }
 436
 437 #define SDATA2_SECTION_FUNCTION                                         \
 438 void                                                                    \
 439 sdata2_section (void)                                                   \
 440 {                                                                       \
 441   if (in_section != in_sdata2)                                          \
 442     {                                                                   \
 443       in_section = in_sdata2;                                           \
 444       fprintf (asm_out_file, "%s\n", SDATA2_SECTION_ASM_OP);            \
 445     }                                                                   \
 446 }
 447
 448 #define SBSS_SECTION_FUNCTION                                           \
 449 void                                                                    \
 450 sbss_section (void)                                                     \
 451 {                                                                       \
 452   if (in_section != in_sbss)                                            \
 453     {                                                                   \
 454       in_section = in_sbss;                                             \
 455       fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP);              \
 456     }                                                                   \
 457 }
 458
 459 #define INIT_SECTION_FUNCTION                                           \
 460 void                                                                    \
 461 init_section (void)                                                     \
 462 {                                                                       \
 463   if (in_section != in_init)                                            \
 464     {                                                                   \
 465       in_section = in_init;                                             \
 466       fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);              \
 467     }                                                                   \
 468 }
 469
 470 #define FINI_SECTION_FUNCTION                                           \
 471 void                                                                    \
 472 fini_section (void)                                                     \
 473 {                                                                       \
 474   if (in_section != in_fini)                                            \
 475     {                                                                   \
 476       in_section = in_fini;                                             \
 477       fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);              \
 478     }                                                                   \
 479 }
 480
 481 /* Override default elf definitions.  */
 482 #undef  TARGET_ASM_SELECT_RTX_SECTION
 483 #define TARGET_ASM_SELECT_RTX_SECTION rs6000_elf_select_rtx_section
 484 #undef  TARGET_ASM_SELECT_SECTION
 485 #define TARGET_ASM_SELECT_SECTION  rs6000_elf_select_section
 486 #define TARGET_ASM_UNIQUE_SECTION  rs6000_elf_unique_section
 487
 488 /* Return nonzero if this entry is to be written into the constant pool
 489    in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
 490    containing one of them.  If -mfp-in-toc (the default), we also do
 491    this for floating-point constants.  We actually can only do this
 492    if the FP formats of the target and host machines are the same, but
 493    we can't check that since not every file that uses
 494    GO_IF_LEGITIMATE_ADDRESS_P includes real.h.
 495
 496    Unlike AIX, we don't key off of -mminimal-toc, but instead do not
 497    allow floating point constants in the TOC if -mrelocatable.  */
 498
 499 #undef  ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
 500 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)                        \
 501   (TARGET_TOC                                                           \
 502    && (GET_CODE (X) == SYMBOL_REF                                       \
 503        || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS      \
 504            && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)           \
 505        || GET_CODE (X) == LABEL_REF                                     \
 506        || (GET_CODE (X) == CONST_INT                                    \
 507            && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))      \
 508        || (!TARGET_NO_FP_IN_TOC                                         \
 509            && !TARGET_RELOCATABLE                                       \
 510            && GET_CODE (X) == CONST_DOUBLE                              \
 511            && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT               \
 512            && BITS_PER_WORD == HOST_BITS_PER_INT)))
 513
 514 /* These macros generate the special .type and .size directives which
 515    are used to set the corresponding fields of the linker symbol table
 516    entries in an ELF object file under SVR4.  These macros also output
 517    the starting labels for the relevant functions/objects.  */
 518
 519 /* Write the extra assembler code needed to declare a function properly.
 520    Some svr4 assemblers need to also have something extra said about the
 521    function's return value.  We allow for that here.  */
 522
 523 extern int rs6000_pic_labelno;
 524
 525 /* Override elfos.h definition.  */
 526 #undef  ASM_DECLARE_FUNCTION_NAME
 527 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 528   rs6000_elf_declare_function_name ((FILE), (NAME), (DECL))
 529
 530 /* The USER_LABEL_PREFIX stuff is affected by the -fleading-underscore
 531    flag.  The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
 532
 533 #define LOCAL_LABEL_PREFIX "."
 534 #define USER_LABEL_PREFIX ""
 535
 536 /* svr4.h overrides (*targetm.asm_out.internal_label).  */
 537
 538 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)   \
 539   asm_fprintf (FILE, "%L%s", PREFIX)
 540
 541 /* Globalizing directive for a label.  */
 542 #define GLOBAL_ASM_OP "\t.globl "
 543
 544 /* This says how to output assembler code to declare an
 545    uninitialized internal linkage data object.  Under SVR4,
 546    the linker seems to want the alignment of data objects
 547    to depend on their types.  We do exactly that here.  */
 548
 549 #define LOCAL_ASM_OP    "\t.local\t"
 550
 551 #define LCOMM_ASM_OP    "\t.lcomm\t"
 552
 553 /* Override elfos.h definition.  */
 554 #undef  ASM_OUTPUT_ALIGNED_LOCAL
 555 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 556 do {                                                                    \
 557   if (rs6000_sdata != SDATA_NONE && (SIZE) > 0                          \
 558       && (SIZE) <= g_switch_value)                                      \
 559     {                                                                   \
 560       sbss_section ();                                                  \
 561       ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT));      \
 562       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
 563       ASM_OUTPUT_SKIP (FILE, SIZE);                                     \
 564       if (!flag_inhibit_size_directive && (SIZE) > 0)                   \
 565         ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                   \
 566     }                                                                   \
 567   else                                                                  \
 568     {                                                                   \
 569       fprintf (FILE, "%s", LCOMM_ASM_OP);                               \
 570       assemble_name ((FILE), (NAME));                                   \
 571       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 572                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
 573     }                                                                   \
 574   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 575 } while (0)
 576
 577 /* Describe how to emit uninitialized external linkage items.  */
 578 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 579 do {                                                                    \
 580   ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN);                   \
 581 } while (0)
 582
 583 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 584 /* To support -falign-* switches we need to use .p2align so
 585    that alignment directives in code sections will be padded
 586    with no-op instructions, rather than zeroes.  */
 587 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
 588   if ((LOG) != 0)                                                       \
 589     {                                                                   \
 590       if ((MAX_SKIP) == 0)                                              \
 591         fprintf ((FILE), "\t.p2align %d\n", (LOG));                     \
 592       else                                                              \
 593         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
 594     }
 595 #endif
 596
 597 /* This is how to output code to push a register on the stack.
 598    It need not be very fast code.
 599
 600    On the rs6000, we must keep the backchain up to date.  In order
 601    to simplify things, always allocate 16 bytes for a push (System V
 602    wants to keep stack aligned to a 16 byte boundary).  */
 603
 604 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO)                                \
 605 do {                                                                    \
 606   if (DEFAULT_ABI == ABI_V4)                                            \
 607     asm_fprintf (FILE,                                                  \
 608                  "\t{stu|stwu} %s,-16(%s)\n\t{st|stw} %s,12(%s)\n",     \
 609                  reg_names[1], reg_names[1], reg_names[REGNO],          \
 610                  reg_names[1]);                                         \
 611 } while (0)
 612
 613 /* This is how to output an insn to pop a register from the stack.
 614    It need not be very fast code.  */
 615
 616 #define ASM_OUTPUT_REG_POP(FILE, REGNO)                                 \
 617 do {                                                                    \
 618   if (DEFAULT_ABI == ABI_V4)                                            \
 619     asm_fprintf (FILE,                                                  \
 620                  "\t{l|lwz} %s,12(%s)\n\t{ai|addic} %s,%s,16\n",        \
 621                  reg_names[REGNO], reg_names[1], reg_names[1],          \
 622                  reg_names[1]);                                         \
 623 } while (0)
 624
 625 /* Switch  Recognition by gcc.c.  Add -G xx support.  */
 626
 627 /* Override svr4.h definition.  */
 628 #undef  SWITCH_TAKES_ARG
 629 #define SWITCH_TAKES_ARG(CHAR)                                          \
 630   ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o'                      \
 631    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u'                   \
 632    || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x'                   \
 633    || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V'                   \
 634    || (CHAR) == 'B' || (CHAR) == 'b' || (CHAR) == 'G')
 635
 636 extern int fixuplabelno;
 637
 638 /* Handle constructors specially for -mrelocatable.  */
 639 #define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
 640 #define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor
 641
 642 /* This is the end of what might become sysv4.h.  */
 643
 644 /* Use DWARF 2 debugging information by default.  */
 645 #undef  PREFERRED_DEBUGGING_TYPE
 646 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 647
 648 /* Historically we have also supported stabs debugging.  */
 649 #define DBX_DEBUGGING_INFO 1
 650
 651 #define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
 652
 653 /* Map register numbers held in the call frame info that gcc has
 654    collected using DWARF_FRAME_REGNUM to those that should be output in
 655    .debug_frame and .eh_frame.  We continue to use gcc hard reg numbers
 656    for .eh_frame, but use the numbers mandated by the various ABIs for
 657    .debug_frame.  rs6000_emit_prologue has translated any combination of
 658    CR2, CR3, CR4 saves to a save of CR2.  The actual code emitted saves
 659    the whole of CR, so we map CR2_REGNO to the DWARF reg for CR.  */
 660 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH)     \
 661   ((FOR_EH) ? (REGNO)                           \
 662    : (REGNO) == CR2_REGNO ? 64                  \
 663    : DBX_REGISTER_NUMBER (REGNO))
 664
 665 #define TARGET_ENCODE_SECTION_INFO  rs6000_elf_encode_section_info
 666 #define TARGET_IN_SMALL_DATA_P  rs6000_elf_in_small_data_p
 667 #define TARGET_SECTION_TYPE_FLAGS  rs6000_elf_section_type_flags
 668
 669 /* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */
 670
 671 #define RS6000_OUTPUT_BASENAME(FILE, NAME)      \
 672     assemble_name (FILE, NAME)
 673
 674 /* We have to output the stabs for the function name *first*, before
 675    outputting its label.  */
 676
 677 #define DBX_FUNCTION_FIRST
 678
 679 /* This is the end of what might become sysv4dbx.h.  */
 680
 681 #ifndef TARGET_VERSION
 682 #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
 683 #endif
 684 \f
 685 #define TARGET_OS_SYSV_CPP_BUILTINS()           \
 686   do                                            \
 687     {                                           \
 688       if (target_flags_explicit                 \
 689           & MASK_RELOCATABLE)                   \
 690         builtin_define ("_RELOCATABLE");        \
 691     }                                           \
 692   while (0)
 693
 694 #ifndef TARGET_OS_CPP_BUILTINS
 695 #define TARGET_OS_CPP_BUILTINS()                \
 696   do                                            \
 697     {                                           \
 698       builtin_define_std ("PPC");               \
 699       builtin_define_std ("unix");              \
 700       builtin_define ("__svr4__");              \
 701       builtin_assert ("system=unix");           \
 702       builtin_assert ("system=svr4");           \
 703       builtin_assert ("cpu=powerpc");           \
 704       builtin_assert ("machine=powerpc");       \
 705       TARGET_OS_SYSV_CPP_BUILTINS ();           \
 706     }                                           \
 707   while (0)
 708 #endif
 709
 710 /* Pass various options to the assembler.  */
 711 /* Override svr4.h definition.  */
 712 #undef  ASM_SPEC
 713 #define ASM_SPEC "%(asm_cpu) \
 714 %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
 715 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
 716 %{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \
 717 %{memb|msdata|msdata=eabi: -memb} \
 718 %{mlittle|mlittle-endian:-mlittle; \
 719   mbig|mbig-endian      :-mbig;    \
 720   mcall-aixdesc |                  \
 721   mcall-freebsd |                  \
 722   mcall-netbsd  |                  \
 723   mcall-openbsd |                  \
 724   mcall-linux   |                  \
 725   mcall-gnu             :-mbig;    \
 726   mcall-i960-old        :-mlittle}"
 727
 728 #define CC1_ENDIAN_BIG_SPEC ""
 729
 730 #define CC1_ENDIAN_LITTLE_SPEC "\
 731 %{!mstrict-align: %{!mno-strict-align: \
 732     %{!mcall-i960-old: \
 733         -mstrict-align \
 734     } \
 735 }}"
 736
 737 #define CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"
 738
 739 #ifndef CC1_SECURE_PLT_DEFAULT_SPEC
 740 #define CC1_SECURE_PLT_DEFAULT_SPEC ""
 741 #endif
 742
 743 /* Pass -G xxx to the compiler and set correct endian mode.  */
 744 #define CC1_SPEC "%{G*} \
 745 %{mlittle|mlittle-endian: %(cc1_endian_little);           \
 746   mbig   |mbig-endian   : %(cc1_endian_big);              \
 747   mcall-aixdesc |                                         \
 748   mcall-freebsd |                                         \
 749   mcall-netbsd  |                                         \
 750   mcall-openbsd |                                         \
 751   mcall-linux   |                                         \
 752   mcall-gnu             : -mbig %(cc1_endian_big);        \
 753   mcall-i960-old        : -mlittle %(cc1_endian_little);  \
 754                         : %(cc1_endian_default)}          \
 755 %{meabi: %{!mcall-*: -mcall-sysv }} \
 756 %{!meabi: %{!mno-eabi: \
 757     %{mrelocatable: -meabi } \
 758     %{mcall-freebsd: -mno-eabi } \
 759     %{mcall-i960-old: -meabi } \
 760     %{mcall-linux: -mno-eabi } \
 761     %{mcall-gnu: -mno-eabi } \
 762     %{mcall-netbsd: -mno-eabi } \
 763     %{mcall-openbsd: -mno-eabi }}} \
 764 %{msdata: -msdata=default} \
 765 %{mno-sdata: -msdata=none} \
 766 %{!mbss-plt: %{!msecure-plt: %(cc1_secure_plt_default)}} \
 767 %{profile: -p}"
 768
 769 /* Don't put -Y P,<path> for cross compilers.  */
 770 #ifndef CROSS_COMPILE
 771 #define LINK_PATH_SPEC "\
 772 %{!R*:%{L*:-R %*}} \
 773 %{!nostdlib: %{!YP,*: \
 774     %{compat-bsd: \
 775         %{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 776         %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}} \
 777         %{!R*: %{!L*: -R /usr/ucblib}} \
 778     %{!compat-bsd: \
 779         %{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 780         %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}}"
 781
 782 #else
 783 #define LINK_PATH_SPEC ""
 784 #endif
 785
 786 /* Default starting address if specified.  */
 787 #define LINK_START_SPEC "\
 788 %{mads         : %(link_start_ads)         ; \
 789   myellowknife : %(link_start_yellowknife) ; \
 790   mmvme        : %(link_start_mvme)        ; \
 791   msim         : %(link_start_sim)         ; \
 792   mwindiss     : %(link_start_windiss)     ; \
 793   mcall-freebsd: %(link_start_freebsd)     ; \
 794   mcall-linux  : %(link_start_linux)       ; \
 795   mcall-gnu    : %(link_start_gnu)         ; \
 796   mcall-netbsd : %(link_start_netbsd)      ; \
 797   mcall-openbsd: %(link_start_openbsd)     ; \
 798                : %(link_start_default)     }"
 799
 800 #define LINK_START_DEFAULT_SPEC ""
 801
 802 /* Override svr4.h definition.  */
 803 #undef  LINK_SPEC
 804 #define LINK_SPEC "\
 805 %{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
 806 %{YP,*} %{R*} \
 807 %{Qy:} %{!Qn:-Qy} \
 808 %(link_shlib) \
 809 %{!Wl,-T*: %{!T*: %(link_start) }} \
 810 %(link_target) \
 811 %(link_os)"
 812
 813 /* For now, turn off shared libraries by default.  */
 814 #ifndef SHARED_LIB_SUPPORT
 815 #define NO_SHARED_LIB_SUPPORT
 816 #endif
 817
 818 #ifndef NO_SHARED_LIB_SUPPORT
 819 /* Shared libraries are default.  */
 820 #define LINK_SHLIB_SPEC "\
 821 %{!static: %(link_path) %{!R*:%{L*:-R %*}}} \
 822 %{mshlib: } \
 823 %{static:-dn -Bstatic} \
 824 %{shared:-G -dy -z text} \
 825 %{symbolic:-Bsymbolic -G -dy -z text}"
 826
 827 #else
 828 /* Shared libraries are not default.  */
 829 #define LINK_SHLIB_SPEC "\
 830 %{mshlib: %(link_path) } \
 831 %{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
 832 %{static: } \
 833 %{shared:-G -dy -z text %(link_path) } \
 834 %{symbolic:-Bsymbolic -G -dy -z text %(link_path) }"
 835 #endif
 836
 837 /* Override the default target of the linker.  */
 838 #define LINK_TARGET_SPEC "\
 839 %{mlittle: --oformat elf32-powerpcle } %{mlittle-endian: --oformat elf32-powerpcle } \
 840 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
 841     %{mcall-i960-old: --oformat elf32-powerpcle} \
 842   }}}}"
 843
 844 /* Any specific OS flags.  */
 845 #define LINK_OS_SPEC "\
 846 %{mads         : %(link_os_ads)         ; \
 847   myellowknife : %(link_os_yellowknife) ; \
 848   mmvme        : %(link_os_mvme)        ; \
 849   msim         : %(link_os_sim)         ; \
 850   mwindiss     : %(link_os_windiss)     ; \
 851   mcall-freebsd: %(link_os_freebsd)     ; \
 852   mcall-linux  : %(link_os_linux)       ; \
 853   mcall-gnu    : %(link_os_gnu)         ; \
 854   mcall-netbsd : %(link_os_netbsd)      ; \
 855   mcall-openbsd: %(link_os_openbsd)     ; \
 856                : %(link_os_default)     }"
 857
 858 #define LINK_OS_DEFAULT_SPEC ""
 859
 860 /* Override rs6000.h definition.  */
 861 #undef  CPP_SPEC
 862 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE} \
 863 %{mads         : %(cpp_os_ads)         ; \
 864   myellowknife : %(cpp_os_yellowknife) ; \
 865   mmvme        : %(cpp_os_mvme)        ; \
 866   msim         : %(cpp_os_sim)         ; \
 867   mwindiss     : %(cpp_os_windiss)     ; \
 868   mcall-freebsd: %(cpp_os_freebsd)     ; \
 869   mcall-linux  : %(cpp_os_linux)       ; \
 870   mcall-gnu    : %(cpp_os_gnu)         ; \
 871   mcall-netbsd : %(cpp_os_netbsd)      ; \
 872   mcall-openbsd: %(cpp_os_openbsd)     ; \
 873                : %(cpp_os_default)     }"
 874
 875 #define CPP_OS_DEFAULT_SPEC ""
 876
 877 /* Override svr4.h definition.  */
 878 #undef  STARTFILE_SPEC
 879 #define STARTFILE_SPEC "\
 880 %{mads         : %(startfile_ads)         ; \
 881   myellowknife : %(startfile_yellowknife) ; \
 882   mmvme        : %(startfile_mvme)        ; \
 883   msim         : %(startfile_sim)         ; \
 884   mwindiss     : %(startfile_windiss)     ; \
 885   mcall-freebsd: %(startfile_freebsd)     ; \
 886   mcall-linux  : %(startfile_linux)       ; \
 887   mcall-gnu    : %(startfile_gnu)         ; \
 888   mcall-netbsd : %(startfile_netbsd)      ; \
 889   mcall-openbsd: %(startfile_openbsd)     ; \
 890                : %(startfile_default)     }"
 891
 892 #define STARTFILE_DEFAULT_SPEC ""
 893
 894 /* Override svr4.h definition.  */
 895 #undef  LIB_SPEC
 896 #define LIB_SPEC "\
 897 %{mads         : %(lib_ads)         ; \
 898   myellowknife : %(lib_yellowknife) ; \
 899   mmvme        : %(lib_mvme)        ; \
 900   msim         : %(lib_sim)         ; \
 901   mwindiss     : %(lib_windiss)     ; \
 902   mcall-freebsd: %(lib_freebsd)     ; \
 903   mcall-linux  : %(lib_linux)       ; \
 904   mcall-gnu    : %(lib_gnu)         ; \
 905   mcall-netbsd : %(lib_netbsd)      ; \
 906   mcall-openbsd: %(lib_openbsd)     ; \
 907                : %(lib_default)     }"
 908
 909 #define LIB_DEFAULT_SPEC ""
 910
 911 /* Override svr4.h definition.  */
 912 #undef  ENDFILE_SPEC
 913 #define ENDFILE_SPEC "\
 914 %{mads         : crtsavres.o%s        %(endfile_ads)         ; \
 915   myellowknife : crtsavres.o%s        %(endfile_yellowknife) ; \
 916   mmvme        : crtsavres.o%s        %(endfile_mvme)        ; \
 917   msim         : crtsavres.o%s        %(endfile_sim)         ; \
 918   mwindiss     :                      %(endfile_windiss)     ; \
 919   mcall-freebsd: crtsavres.o%s        %(endfile_freebsd)     ; \
 920   mcall-linux  : crtsavres.o%s        %(endfile_linux)       ; \
 921   mcall-gnu    : crtsavres.o%s        %(endfile_gnu)         ; \
 922   mcall-netbsd : crtsavres.o%s        %(endfile_netbsd)      ; \
 923   mcall-openbsd: crtsavres.o%s        %(endfile_openbsd)     ; \
 924                : %(crtsavres_default) %(endfile_default)     }"
 925
 926 #define CRTSAVRES_DEFAULT_SPEC "crtsavres.o%s"
 927
 928 #define ENDFILE_DEFAULT_SPEC ""
 929
 930 /* Motorola ADS support.  */
 931 #define LIB_ADS_SPEC "--start-group -lads -lc --end-group"
 932
 933 #define STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 934
 935 #define ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"
 936
 937 #define LINK_START_ADS_SPEC "-T ads.ld%s"
 938
 939 #define LINK_OS_ADS_SPEC ""
 940
 941 #define CPP_OS_ADS_SPEC ""
 942
 943 /* Motorola Yellowknife support.  */
 944 #define LIB_YELLOWKNIFE_SPEC "--start-group -lyk -lc --end-group"
 945
 946 #define STARTFILE_YELLOWKNIFE_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 947
 948 #define ENDFILE_YELLOWKNIFE_SPEC "crtend.o%s ecrtn.o%s"
 949
 950 #define LINK_START_YELLOWKNIFE_SPEC "-T yellowknife.ld%s"
 951
 952 #define LINK_OS_YELLOWKNIFE_SPEC ""
 953
 954 #define CPP_OS_YELLOWKNIFE_SPEC ""
 955
 956 /* Motorola MVME support.  */
 957 #define LIB_MVME_SPEC "--start-group -lmvme -lc --end-group"
 958
 959 #define STARTFILE_MVME_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 960
 961 #define ENDFILE_MVME_SPEC "crtend.o%s ecrtn.o%s"
 962
 963 #define LINK_START_MVME_SPEC "-Ttext 0x40000"
 964
 965 #define LINK_OS_MVME_SPEC ""
 966
 967 #define CPP_OS_MVME_SPEC ""
 968
 969 /* PowerPC simulator based on netbsd system calls support.  */
 970 #define LIB_SIM_SPEC "--start-group -lsim -lc --end-group"
 971
 972 #define STARTFILE_SIM_SPEC "ecrti.o%s sim-crt0.o%s crtbegin.o%s"
 973
 974 #define ENDFILE_SIM_SPEC "crtend.o%s ecrtn.o%s"
 975
 976 #define LINK_START_SIM_SPEC ""
 977
 978 #define LINK_OS_SIM_SPEC "-m elf32ppcsim"
 979
 980 #define CPP_OS_SIM_SPEC ""
 981
 982 /* FreeBSD support.  */
 983
 984 #define CPP_OS_FREEBSD_SPEC     "\
 985   -D__PPC__ -D__ppc__ -D__PowerPC__ -D__powerpc__ \
 986   -Acpu=powerpc -Amachine=powerpc"
 987
 988 #define STARTFILE_FREEBSD_SPEC  FBSD_STARTFILE_SPEC
 989 #define ENDFILE_FREEBSD_SPEC    FBSD_ENDFILE_SPEC
 990 #define LIB_FREEBSD_SPEC        FBSD_LIB_SPEC
 991 #define LINK_START_FREEBSD_SPEC ""
 992
 993 #define LINK_OS_FREEBSD_SPEC "\
 994   %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
 995   %{v:-V} \
 996   %{assert*} %{R*} %{rpath*} %{defsym*} \
 997   %{shared:-Bshareable %{h*} %{soname*}} \
 998   %{!shared: \
 999     %{!static: \
1000       %{rdynamic: -export-dynamic} \
1001       %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
1002     %{static:-Bstatic}} \
1003   %{symbolic:-Bsymbolic}"
1004
1005 /* GNU/Linux support.  */
1006 #define LIB_LINUX_SPEC "%{mnewlib: --start-group -llinux -lc --end-group } \
1007 %{!mnewlib: %{pthread:-lpthread} %{shared:-lc} \
1008 %{!shared: %{profile:-lc_p} %{!profile:-lc}}}"
1009
1010 #ifdef HAVE_LD_PIE
1011 #define STARTFILE_LINUX_SPEC "\
1012 %{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
1013 %{mnewlib:ecrti.o%s;:crti.o%s} \
1014 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1015 #else
1016 #define STARTFILE_LINUX_SPEC "\
1017 %{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
1018 %{mnewlib:ecrti.o%s;:crti.o%s} \
1019 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1020 #endif
1021
1022 #define ENDFILE_LINUX_SPEC "\
1023 %{shared|pie:crtendS.o%s;:crtend.o%s} \
1024 %{mnewlib:ecrtn.o%s;:crtn.o%s}"
1025
1026 #define LINK_START_LINUX_SPEC ""
1027
1028 #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1029   %{rdynamic:-export-dynamic} \
1030   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1031
1032 #if defined(HAVE_LD_EH_FRAME_HDR)
1033 # define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
1034 #endif
1035
1036 #define CPP_OS_LINUX_SPEC "-D__unix__ -D__gnu_linux__ -D__linux__ \
1037 %{!undef:                                                         \
1038   %{!ansi:                                                        \
1039     %{!std=*:-Dunix -D__unix -Dlinux -D__linux}                   \
1040     %{std=gnu*:-Dunix -D__unix -Dlinux -D__linux}}}               \
1041 -Asystem=linux -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1042
1043 /* GNU/Hurd support.  */
1044 #define LIB_GNU_SPEC "%{mnewlib: --start-group -lgnu -lc --end-group } \
1045 %{!mnewlib: %{shared:-lc} %{!shared: %{pthread:-lpthread } \
1046 %{profile:-lc_p} %{!profile:-lc}}}"
1047
1048 #define STARTFILE_GNU_SPEC "\
1049 %{!shared: %{!static: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}} \
1050 %{static: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1051 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1052 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1053
1054 #define ENDFILE_GNU_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1055 %{mnewlib: ecrtn.o%s} %{!mnewlib: crtn.o%s}"
1056
1057 #define LINK_START_GNU_SPEC ""
1058
1059 #define LINK_OS_GNU_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1060   %{rdynamic:-export-dynamic} \
1061   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1062
1063 #define CPP_OS_GNU_SPEC "-D__unix__ -D__gnu_hurd__ -D__GNU__    \
1064 %{!undef:                                                       \
1065   %{!ansi: -Dunix -D__unix}}                                    \
1066 -Asystem=gnu -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1067
1068 /* NetBSD support.  */
1069 #define LIB_NETBSD_SPEC "\
1070 %{profile:-lgmon -lc_p} %{!profile:-lc}"
1071
1072 #define STARTFILE_NETBSD_SPEC "\
1073 ncrti.o%s crt0.o%s \
1074 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1075
1076 #define ENDFILE_NETBSD_SPEC "\
1077 %{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1078 ncrtn.o%s"
1079
1080 #define LINK_START_NETBSD_SPEC "\
1081 "
1082
1083 #define LINK_OS_NETBSD_SPEC "\
1084 %{!shared: %{!static: \
1085   %{rdynamic:-export-dynamic} \
1086   %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}}}"
1087
1088 #define CPP_OS_NETBSD_SPEC "\
1089 -D__powerpc__ -D__NetBSD__ -D__KPRINTF_ATTRIBUTE__"
1090
1091 /* OpenBSD support.  */
1092 #ifndef LIB_OPENBSD_SPEC
1093 #define LIB_OPENBSD_SPEC "%{!shared:%{pthread:-lpthread%{p:_p}%{!p:%{pg:_p}}}} %{!shared:-lc%{p:_p}%{!p:%{pg:_p}}}"
1094 #endif
1095
1096 #ifndef STARTFILE_OPENBSD_SPEC
1097 #define STARTFILE_OPENBSD_SPEC "\
1098 %{!shared: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1099 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1100 #endif
1101
1102 #ifndef ENDFILE_OPENBSD_SPEC
1103 #define ENDFILE_OPENBSD_SPEC "\
1104 %{!shared:crtend.o%s} %{shared:crtendS.o%s}"
1105 #endif
1106
1107 #ifndef LINK_START_OPENBSD_SPEC
1108 #define LINK_START_OPENBSD_SPEC "-Ttext 0x400074"
1109 #endif
1110
1111 #ifndef LINK_OS_OPENBSD_SPEC
1112 #define LINK_OS_OPENBSD_SPEC ""
1113 #endif
1114
1115 #ifndef CPP_OS_OPENBSD_SPEC
1116 #define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
1117 #endif
1118
1119 /* WindISS support.  */
1120
1121 #define LIB_WINDISS_SPEC "--start-group -li -lcfp -lwindiss -lram -limpl -limpfp --end-group"
1122
1123 #define CPP_OS_WINDISS_SPEC "\
1124 -D__rtasim \
1125 -D__EABI__ \
1126 -D__ppc \
1127 %{!msoft-float: -D__hardfp} \
1128 "
1129
1130 #define STARTFILE_WINDISS_SPEC "crt0.o%s crtbegin.o%s"
1131
1132 #define ENDFILE_WINDISS_SPEC "crtend.o%s"
1133
1134 #define LINK_START_WINDISS_SPEC ""
1135
1136 #define LINK_OS_WINDISS_SPEC ""
1137
1138 /* Define any extra SPECS that the compiler needs to generate.  */
1139 /* Override rs6000.h definition.  */
1140 #undef  SUBTARGET_EXTRA_SPECS
1141 #define SUBTARGET_EXTRA_SPECS                                           \
1142   { "crtsavres_default",        CRTSAVRES_DEFAULT_SPEC },               \
1143   { "lib_ads",                  LIB_ADS_SPEC },                         \
1144   { "lib_yellowknife",          LIB_YELLOWKNIFE_SPEC },                 \
1145   { "lib_mvme",                 LIB_MVME_SPEC },                        \
1146   { "lib_sim",                  LIB_SIM_SPEC },                         \
1147   { "lib_freebsd",              LIB_FREEBSD_SPEC },                     \
1148   { "lib_gnu",                  LIB_GNU_SPEC },                         \
1149   { "lib_linux",                LIB_LINUX_SPEC },                       \
1150   { "lib_netbsd",               LIB_NETBSD_SPEC },                      \
1151   { "lib_openbsd",              LIB_OPENBSD_SPEC },                     \
1152   { "lib_windiss",              LIB_WINDISS_SPEC },                     \
1153   { "lib_default",              LIB_DEFAULT_SPEC },                     \
1154   { "startfile_ads",            STARTFILE_ADS_SPEC },                   \
1155   { "startfile_yellowknife",    STARTFILE_YELLOWKNIFE_SPEC },           \
1156   { "startfile_mvme",           STARTFILE_MVME_SPEC },                  \
1157   { "startfile_sim",            STARTFILE_SIM_SPEC },                   \
1158   { "startfile_freebsd",        STARTFILE_FREEBSD_SPEC },               \
1159   { "startfile_gnu",            STARTFILE_GNU_SPEC },                   \
1160   { "startfile_linux",          STARTFILE_LINUX_SPEC },                 \
1161   { "startfile_netbsd",         STARTFILE_NETBSD_SPEC },                \
1162   { "startfile_openbsd",        STARTFILE_OPENBSD_SPEC },               \
1163   { "startfile_windiss",        STARTFILE_WINDISS_SPEC },               \
1164   { "startfile_default",        STARTFILE_DEFAULT_SPEC },               \
1165   { "endfile_ads",              ENDFILE_ADS_SPEC },                     \
1166   { "endfile_yellowknife",      ENDFILE_YELLOWKNIFE_SPEC },             \
1167   { "endfile_mvme",             ENDFILE_MVME_SPEC },                    \
1168   { "endfile_sim",              ENDFILE_SIM_SPEC },                     \
1169   { "endfile_freebsd",          ENDFILE_FREEBSD_SPEC },                 \
1170   { "endfile_gnu",              ENDFILE_GNU_SPEC },                     \
1171   { "endfile_linux",            ENDFILE_LINUX_SPEC },                   \
1172   { "endfile_netbsd",           ENDFILE_NETBSD_SPEC },                  \
1173   { "endfile_openbsd",          ENDFILE_OPENBSD_SPEC },                 \
1174   { "endfile_windiss",          ENDFILE_WINDISS_SPEC },                 \
1175   { "endfile_default",          ENDFILE_DEFAULT_SPEC },                 \
1176   { "link_path",                LINK_PATH_SPEC },                       \
1177   { "link_shlib",               LINK_SHLIB_SPEC },                      \
1178   { "link_target",              LINK_TARGET_SPEC },                     \
1179   { "link_start",               LINK_START_SPEC },                      \
1180   { "link_start_ads",           LINK_START_ADS_SPEC },                  \
1181   { "link_start_yellowknife",   LINK_START_YELLOWKNIFE_SPEC },          \
1182   { "link_start_mvme",          LINK_START_MVME_SPEC },                 \
1183   { "link_start_sim",           LINK_START_SIM_SPEC },                  \
1184   { "link_start_freebsd",       LINK_START_FREEBSD_SPEC },              \
1185   { "link_start_gnu",           LINK_START_GNU_SPEC },                  \
1186   { "link_start_linux",         LINK_START_LINUX_SPEC },                \
1187   { "link_start_netbsd",        LINK_START_NETBSD_SPEC },               \
1188   { "link_start_openbsd",       LINK_START_OPENBSD_SPEC },              \
1189   { "link_start_windiss",       LINK_START_WINDISS_SPEC },              \
1190   { "link_start_default",       LINK_START_DEFAULT_SPEC },              \
1191   { "link_os",                  LINK_OS_SPEC },                         \
1192   { "link_os_ads",              LINK_OS_ADS_SPEC },                     \
1193   { "link_os_yellowknife",      LINK_OS_YELLOWKNIFE_SPEC },             \
1194   { "link_os_mvme",             LINK_OS_MVME_SPEC },                    \
1195   { "link_os_sim",              LINK_OS_SIM_SPEC },                     \
1196   { "link_os_freebsd",          LINK_OS_FREEBSD_SPEC },                 \
1197   { "link_os_linux",            LINK_OS_LINUX_SPEC },                   \
1198   { "link_os_gnu",              LINK_OS_GNU_SPEC },                     \
1199   { "link_os_netbsd",           LINK_OS_NETBSD_SPEC },                  \
1200   { "link_os_openbsd",          LINK_OS_OPENBSD_SPEC },                 \
1201   { "link_os_windiss",          LINK_OS_WINDISS_SPEC },                 \
1202   { "link_os_default",          LINK_OS_DEFAULT_SPEC },                 \
1203   { "cc1_endian_big",           CC1_ENDIAN_BIG_SPEC },                  \
1204   { "cc1_endian_little",        CC1_ENDIAN_LITTLE_SPEC },               \
1205   { "cc1_endian_default",       CC1_ENDIAN_DEFAULT_SPEC },              \
1206   { "cc1_secure_plt_default",   CC1_SECURE_PLT_DEFAULT_SPEC },          \
1207   { "cpp_os_ads",               CPP_OS_ADS_SPEC },                      \
1208   { "cpp_os_yellowknife",       CPP_OS_YELLOWKNIFE_SPEC },              \
1209   { "cpp_os_mvme",              CPP_OS_MVME_SPEC },                     \
1210   { "cpp_os_sim",               CPP_OS_SIM_SPEC },                      \
1211   { "cpp_os_freebsd",           CPP_OS_FREEBSD_SPEC },                  \
1212   { "cpp_os_gnu",               CPP_OS_GNU_SPEC },                      \
1213   { "cpp_os_linux",             CPP_OS_LINUX_SPEC },                    \
1214   { "cpp_os_netbsd",            CPP_OS_NETBSD_SPEC },                   \
1215   { "cpp_os_openbsd",           CPP_OS_OPENBSD_SPEC },                  \
1216   { "cpp_os_windiss",           CPP_OS_WINDISS_SPEC },                  \
1217   { "cpp_os_default",           CPP_OS_DEFAULT_SPEC },                  \
1218   { "fbsd_dynamic_linker",      FBSD_DYNAMIC_LINKER },                  \
1219   SUBSUBTARGET_EXTRA_SPECS
1220
1221 #define SUBSUBTARGET_EXTRA_SPECS
1222
1223 /* Define this macro as a C expression for the initializer of an
1224    array of string to tell the driver program which options are
1225    defaults for this target and thus do not need to be handled
1226    specially when using `MULTILIB_OPTIONS'.
1227
1228    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
1229    the target makefile fragment or if none of the options listed in
1230    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
1231
1232 #define MULTILIB_DEFAULTS { "mbig", "mcall-sysv" }
1233
1234 /* Define this macro if the code for function profiling should come
1235    before the function prologue.  Normally, the profiling code comes
1236    after.  */
1237 #define PROFILE_BEFORE_PROLOGUE 1
1238
1239 /* Function name to call to do profiling.  */
1240 #define RS6000_MCOUNT "_mcount"
1241
1242 /* Define this macro (to a value of 1) if you want to support the
1243    Win32 style pragmas #pragma pack(push,<n>)' and #pragma
1244    pack(pop)'.  The pack(push,<n>) pragma specifies the maximum
1245    alignment (in bytes) of fields within a structure, in much the
1246    same way as the __aligned__' and __packed__' __attribute__'s
1247    do.  A pack value of zero resets the behavior to the default.
1248    Successive invocations of this pragma cause the previous values to
1249    be stacked, so that invocations of #pragma pack(pop)' will return
1250    to the previous value.  */
1251
1252 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
1253
1254 /* Select a format to encode pointers in exception handling data.  CODE
1255    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
1256    true if the symbol may be affected by dynamic relocations.  */
1257 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                            \
1258   ((flag_pic || TARGET_RELOCATABLE)                                          \
1259    ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
1260    : DW_EH_PE_absptr)
1261
1262 #define DOUBLE_INT_ASM_OP "\t.quad\t"
1263
1264 /* Generate entries in .fixup for relocatable addresses.  */
1265 #define RELOCATABLE_NEEDS_FIXUP 1
1266
1267 /* This target uses the sysv4.opt file.  */
1268 #define TARGET_USES_SYSV4_OPT 1