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 /* Size of the V.4 varargs area if needed.  */
 253 /* Override rs6000.h definition.  */
 254 #undef  RS6000_VARARGS_AREA
 255 #define RS6000_VARARGS_AREA (current_function_stdarg ? RS6000_VARARGS_SIZE : 0)
 256
 257 /* Override default big endianism definitions in rs6000.h.  */
 258 #undef  BYTES_BIG_ENDIAN
 259 #undef  WORDS_BIG_ENDIAN
 260 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
 261 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
 262
 263 /* Define this to set the endianness to use in libgcc2.c, which can
 264    not depend on target_flags.  */
 265 #if !defined(__LITTLE_ENDIAN__) && !defined(__sun__)
 266 #define LIBGCC2_WORDS_BIG_ENDIAN 1
 267 #else
 268 #define LIBGCC2_WORDS_BIG_ENDIAN 0
 269 #endif
 270
 271 /* Define cutoff for using external functions to save floating point.
 272    Currently on V.4, always use inline stores.  */
 273 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
 274
 275 /* Put jump tables in read-only memory, rather than in .text.  */
 276 #define JUMP_TABLES_IN_TEXT_SECTION 0
 277
 278 /* Prefix and suffix to use to saving floating point.  */
 279 #define SAVE_FP_PREFIX "_savefpr_"
 280 #define SAVE_FP_SUFFIX "_l"
 281
 282 /* Prefix and suffix to use to restoring floating point.  */
 283 #define RESTORE_FP_PREFIX "_restfpr_"
 284 #define RESTORE_FP_SUFFIX "_l"
 285
 286 /* Type used for ptrdiff_t, as a string used in a declaration.  */
 287 #define PTRDIFF_TYPE "int"
 288
 289 /* Type used for wchar_t, as a string used in a declaration.  */
 290 /* Override svr4.h definition.  */
 291 #undef  WCHAR_TYPE
 292 #define WCHAR_TYPE "long int"
 293
 294 /* Width of wchar_t in bits.  */
 295 /* Override svr4.h definition.  */
 296 #undef  WCHAR_TYPE_SIZE
 297 #define WCHAR_TYPE_SIZE 32
 298
 299 /* Make int foo : 8 not cause structures to be aligned to an int boundary.  */
 300 /* Override elfos.h definition.  */
 301 #undef  PCC_BITFIELD_TYPE_MATTERS
 302 #define PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE)
 303
 304 #undef  BITFIELD_NBYTES_LIMITED
 305 #define BITFIELD_NBYTES_LIMITED (TARGET_NO_BITFIELD_WORD)
 306
 307 /* Define this macro to be the value 1 if instructions will fail to
 308    work if given data not on the nominal alignment.  If instructions
 309    will merely go slower in that case, define this macro as 0.  */
 310 #undef  STRICT_ALIGNMENT
 311 #define STRICT_ALIGNMENT (TARGET_STRICT_ALIGN)
 312
 313 /* Define this macro if you wish to preserve a certain alignment for
 314    the stack pointer, greater than what the hardware enforces.  The
 315    definition is a C expression for the desired alignment (measured
 316    in bits).  This macro must evaluate to a value equal to or larger
 317    than STACK_BOUNDARY.
 318    For the SYSV ABI and variants the alignment of the stack pointer
 319    is usually controlled manually in rs6000.c. However, to maintain
 320    alignment across alloca () in all circumstances,
 321    PREFERRED_STACK_BOUNDARY needs to be set as well.
 322    This has the additional advantage of allowing a bigger maximum
 323    alignment of user objects on the stack.  */
 324
 325 #undef PREFERRED_STACK_BOUNDARY
 326 #define PREFERRED_STACK_BOUNDARY 128
 327
 328 /* Real stack boundary as mandated by the appropriate ABI.  */
 329 #define ABI_STACK_BOUNDARY \
 330   ((TARGET_EABI && !TARGET_ALTIVEC && !TARGET_ALTIVEC_ABI) ? 64 : 128)
 331
 332 /* An expression for the alignment of a structure field FIELD if the
 333    alignment computed in the usual way is COMPUTED.  */
 334 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)                                   \
 335         ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE)     \
 336          ? 128 : COMPUTED)
 337
 338 #undef  BIGGEST_FIELD_ALIGNMENT
 339
 340 /* Use ELF style section commands.  */
 341
 342 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
 343
 344 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
 345
 346 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
 347
 348 /* Override elfos.h definition.  */
 349 #undef  INIT_SECTION_ASM_OP
 350 #define INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""
 351
 352 /* Override elfos.h definition.  */
 353 #undef  FINI_SECTION_ASM_OP
 354 #define FINI_SECTION_ASM_OP "\t.section\t\".fini\",\"ax\""
 355
 356 #define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
 357
 358 /* Put PC relative got entries in .got2.  */
 359 #define MINIMAL_TOC_SECTION_ASM_OP \
 360   (TARGET_RELOCATABLE || (flag_pic && DEFAULT_ABI != ABI_AIX)           \
 361    ? "\t.section\t\".got2\",\"aw\"" : "\t.section\t\".got1\",\"aw\"")
 362
 363 #define SDATA_SECTION_ASM_OP "\t.section\t\".sdata\",\"aw\""
 364 #define SDATA2_SECTION_ASM_OP "\t.section\t\".sdata2\",\"a\""
 365 #define SBSS_SECTION_ASM_OP "\t.section\t\".sbss\",\"aw\",@nobits"
 366
 367 /* Besides the usual ELF sections, we need a toc section.  */
 368 /* Override elfos.h definition.  */
 369 #undef  EXTRA_SECTIONS
 370 #define EXTRA_SECTIONS in_toc, in_sdata, in_sdata2, in_sbss, in_init, in_fini
 371
 372 /* Override elfos.h definition.  */
 373 #undef  EXTRA_SECTION_FUNCTIONS
 374 #define EXTRA_SECTION_FUNCTIONS                                         \
 375   TOC_SECTION_FUNCTION                                                  \
 376   SDATA_SECTION_FUNCTION                                                \
 377   SDATA2_SECTION_FUNCTION                                               \
 378   SBSS_SECTION_FUNCTION                                                 \
 379   INIT_SECTION_FUNCTION                                                 \
 380   FINI_SECTION_FUNCTION
 381
 382 #define TOC_SECTION_FUNCTION                                            \
 383 void                                                                    \
 384 toc_section (void)                                                      \
 385 {                                                                       \
 386   if (in_section != in_toc)                                             \
 387     {                                                                   \
 388       in_section = in_toc;                                              \
 389       if (DEFAULT_ABI == ABI_AIX                                        \
 390           && TARGET_MINIMAL_TOC                                         \
 391           && !TARGET_RELOCATABLE)                                       \
 392         {                                                               \
 393           if (! toc_initialized)                                        \
 394             {                                                           \
 395               toc_initialized = 1;                                      \
 396               fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);       \
 397               (*targetm.asm_out.internal_label) (asm_out_file, "LCTOC", 0); \
 398               fprintf (asm_out_file, "\t.tc ");                         \
 399               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
 400               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 401               fprintf (asm_out_file, "\n");                             \
 402                                                                         \
 403               fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
 404               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 405               fprintf (asm_out_file, " = .+32768\n");                   \
 406             }                                                           \
 407           else                                                          \
 408             fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
 409         }                                                               \
 410       else if (DEFAULT_ABI == ABI_AIX && !TARGET_RELOCATABLE)           \
 411         fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);             \
 412       else                                                              \
 413         {                                                               \
 414           fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP);   \
 415           if (! toc_initialized)                                        \
 416             {                                                           \
 417               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
 418               fprintf (asm_out_file, " = .+32768\n");                   \
 419               toc_initialized = 1;                                      \
 420             }                                                           \
 421         }                                                               \
 422     }                                                                   \
 423 }                                                                       \
 424                                                                         \
 425 extern int in_toc_section (void);                                       \
 426 int in_toc_section (void)                                               \
 427 {                                                                       \
 428   return in_section == in_toc;                                          \
 429 }
 430
 431 #define SDATA_SECTION_FUNCTION                                          \
 432 void                                                                    \
 433 sdata_section (void)                                                    \
 434 {                                                                       \
 435   if (in_section != in_sdata)                                           \
 436     {                                                                   \
 437       in_section = in_sdata;                                            \
 438       fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);             \
 439     }                                                                   \
 440 }
 441
 442 #define SDATA2_SECTION_FUNCTION                                         \
 443 void                                                                    \
 444 sdata2_section (void)                                                   \
 445 {                                                                       \
 446   if (in_section != in_sdata2)                                          \
 447     {                                                                   \
 448       in_section = in_sdata2;                                           \
 449       fprintf (asm_out_file, "%s\n", SDATA2_SECTION_ASM_OP);            \
 450     }                                                                   \
 451 }
 452
 453 #define SBSS_SECTION_FUNCTION                                           \
 454 void                                                                    \
 455 sbss_section (void)                                                     \
 456 {                                                                       \
 457   if (in_section != in_sbss)                                            \
 458     {                                                                   \
 459       in_section = in_sbss;                                             \
 460       fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP);              \
 461     }                                                                   \
 462 }
 463
 464 #define INIT_SECTION_FUNCTION                                           \
 465 void                                                                    \
 466 init_section (void)                                                     \
 467 {                                                                       \
 468   if (in_section != in_init)                                            \
 469     {                                                                   \
 470       in_section = in_init;                                             \
 471       fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);              \
 472     }                                                                   \
 473 }
 474
 475 #define FINI_SECTION_FUNCTION                                           \
 476 void                                                                    \
 477 fini_section (void)                                                     \
 478 {                                                                       \
 479   if (in_section != in_fini)                                            \
 480     {                                                                   \
 481       in_section = in_fini;                                             \
 482       fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);              \
 483     }                                                                   \
 484 }
 485
 486 /* Override default elf definitions.  */
 487 #undef  TARGET_ASM_SELECT_RTX_SECTION
 488 #define TARGET_ASM_SELECT_RTX_SECTION rs6000_elf_select_rtx_section
 489 #undef  TARGET_ASM_SELECT_SECTION
 490 #define TARGET_ASM_SELECT_SECTION  rs6000_elf_select_section
 491 #define TARGET_ASM_UNIQUE_SECTION  rs6000_elf_unique_section
 492
 493 /* Return nonzero if this entry is to be written into the constant pool
 494    in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
 495    containing one of them.  If -mfp-in-toc (the default), we also do
 496    this for floating-point constants.  We actually can only do this
 497    if the FP formats of the target and host machines are the same, but
 498    we can't check that since not every file that uses
 499    GO_IF_LEGITIMATE_ADDRESS_P includes real.h.
 500
 501    Unlike AIX, we don't key off of -mminimal-toc, but instead do not
 502    allow floating point constants in the TOC if -mrelocatable.  */
 503
 504 #undef  ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
 505 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)                        \
 506   (TARGET_TOC                                                           \
 507    && (GET_CODE (X) == SYMBOL_REF                                       \
 508        || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS      \
 509            && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)           \
 510        || GET_CODE (X) == LABEL_REF                                     \
 511        || (GET_CODE (X) == CONST_INT                                    \
 512            && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))      \
 513        || (!TARGET_NO_FP_IN_TOC                                         \
 514            && !TARGET_RELOCATABLE                                       \
 515            && GET_CODE (X) == CONST_DOUBLE                              \
 516            && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT               \
 517            && BITS_PER_WORD == HOST_BITS_PER_INT)))
 518
 519 /* These macros generate the special .type and .size directives which
 520    are used to set the corresponding fields of the linker symbol table
 521    entries in an ELF object file under SVR4.  These macros also output
 522    the starting labels for the relevant functions/objects.  */
 523
 524 /* Write the extra assembler code needed to declare a function properly.
 525    Some svr4 assemblers need to also have something extra said about the
 526    function's return value.  We allow for that here.  */
 527
 528 extern int rs6000_pic_labelno;
 529
 530 /* Override elfos.h definition.  */
 531 #undef  ASM_DECLARE_FUNCTION_NAME
 532 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 533   rs6000_elf_declare_function_name ((FILE), (NAME), (DECL))
 534
 535 /* The USER_LABEL_PREFIX stuff is affected by the -fleading-underscore
 536    flag.  The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
 537
 538 #define LOCAL_LABEL_PREFIX "."
 539 #define USER_LABEL_PREFIX ""
 540
 541 /* svr4.h overrides (*targetm.asm_out.internal_label).  */
 542
 543 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)   \
 544   asm_fprintf (FILE, "%L%s", PREFIX)
 545
 546 /* Globalizing directive for a label.  */
 547 #define GLOBAL_ASM_OP "\t.globl "
 548
 549 /* This says how to output assembler code to declare an
 550    uninitialized internal linkage data object.  Under SVR4,
 551    the linker seems to want the alignment of data objects
 552    to depend on their types.  We do exactly that here.  */
 553
 554 #define LOCAL_ASM_OP    "\t.local\t"
 555
 556 #define LCOMM_ASM_OP    "\t.lcomm\t"
 557
 558 /* Override elfos.h definition.  */
 559 #undef  ASM_OUTPUT_ALIGNED_LOCAL
 560 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 561 do {                                                                    \
 562   if (rs6000_sdata != SDATA_NONE && (SIZE) > 0                          \
 563       && (SIZE) <= g_switch_value)                                      \
 564     {                                                                   \
 565       sbss_section ();                                                  \
 566       ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT));      \
 567       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
 568       ASM_OUTPUT_SKIP (FILE, SIZE);                                     \
 569       if (!flag_inhibit_size_directive && (SIZE) > 0)                   \
 570         ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                   \
 571     }                                                                   \
 572   else                                                                  \
 573     {                                                                   \
 574       fprintf (FILE, "%s", LCOMM_ASM_OP);                               \
 575       assemble_name ((FILE), (NAME));                                   \
 576       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 577                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
 578     }                                                                   \
 579   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 580 } while (0)
 581
 582 /* Describe how to emit uninitialized external linkage items.  */
 583 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 584 do {                                                                    \
 585   ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN);                   \
 586 } while (0)
 587
 588 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 589 /* To support -falign-* switches we need to use .p2align so
 590    that alignment directives in code sections will be padded
 591    with no-op instructions, rather than zeroes.  */
 592 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
 593   if ((LOG) != 0)                                                       \
 594     {                                                                   \
 595       if ((MAX_SKIP) == 0)                                              \
 596         fprintf ((FILE), "\t.p2align %d\n", (LOG));                     \
 597       else                                                              \
 598         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
 599     }
 600 #endif
 601
 602 /* This is how to output code to push a register on the stack.
 603    It need not be very fast code.
 604
 605    On the rs6000, we must keep the backchain up to date.  In order
 606    to simplify things, always allocate 16 bytes for a push (System V
 607    wants to keep stack aligned to a 16 byte boundary).  */
 608
 609 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO)                                \
 610 do {                                                                    \
 611   if (DEFAULT_ABI == ABI_V4)                                            \
 612     asm_fprintf (FILE,                                                  \
 613                  "\t{stu|stwu} %s,-16(%s)\n\t{st|stw} %s,12(%s)\n",     \
 614                  reg_names[1], reg_names[1], reg_names[REGNO],          \
 615                  reg_names[1]);                                         \
 616 } while (0)
 617
 618 /* This is how to output an insn to pop a register from the stack.
 619    It need not be very fast code.  */
 620
 621 #define ASM_OUTPUT_REG_POP(FILE, REGNO)                                 \
 622 do {                                                                    \
 623   if (DEFAULT_ABI == ABI_V4)                                            \
 624     asm_fprintf (FILE,                                                  \
 625                  "\t{l|lwz} %s,12(%s)\n\t{ai|addic} %s,%s,16\n",        \
 626                  reg_names[REGNO], reg_names[1], reg_names[1],          \
 627                  reg_names[1]);                                         \
 628 } while (0)
 629
 630 /* Switch  Recognition by gcc.c.  Add -G xx support.  */
 631
 632 /* Override svr4.h definition.  */
 633 #undef  SWITCH_TAKES_ARG
 634 #define SWITCH_TAKES_ARG(CHAR)                                          \
 635   ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o'                      \
 636    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u'                   \
 637    || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x'                   \
 638    || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V'                   \
 639    || (CHAR) == 'B' || (CHAR) == 'b' || (CHAR) == 'G')
 640
 641 extern int fixuplabelno;
 642
 643 /* Handle constructors specially for -mrelocatable.  */
 644 #define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
 645 #define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor
 646
 647 /* This is the end of what might become sysv4.h.  */
 648
 649 /* Use DWARF 2 debugging information by default.  */
 650 #undef  PREFERRED_DEBUGGING_TYPE
 651 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 652
 653 /* Historically we have also supported stabs debugging.  */
 654 #define DBX_DEBUGGING_INFO 1
 655
 656 #define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
 657
 658 /* Map register numbers held in the call frame info that gcc has
 659    collected using DWARF_FRAME_REGNUM to those that should be output in
 660    .debug_frame and .eh_frame.  We continue to use gcc hard reg numbers
 661    for .eh_frame, but use the numbers mandated by the various ABIs for
 662    .debug_frame.  rs6000_emit_prologue has translated any combination of
 663    CR2, CR3, CR4 saves to a save of CR2.  The actual code emitted saves
 664    the whole of CR, so we map CR2_REGNO to the DWARF reg for CR.  */
 665 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH)     \
 666   ((FOR_EH) ? (REGNO)                           \
 667    : (REGNO) == CR2_REGNO ? 64                  \
 668    : DBX_REGISTER_NUMBER (REGNO))
 669
 670 #define TARGET_ENCODE_SECTION_INFO  rs6000_elf_encode_section_info
 671 #define TARGET_IN_SMALL_DATA_P  rs6000_elf_in_small_data_p
 672 #define TARGET_SECTION_TYPE_FLAGS  rs6000_elf_section_type_flags
 673
 674 /* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */
 675
 676 #define RS6000_OUTPUT_BASENAME(FILE, NAME)      \
 677     assemble_name (FILE, NAME)
 678
 679 /* We have to output the stabs for the function name *first*, before
 680    outputting its label.  */
 681
 682 #define DBX_FUNCTION_FIRST
 683
 684 /* This is the end of what might become sysv4dbx.h.  */
 685
 686 #ifndef TARGET_VERSION
 687 #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
 688 #endif
 689 \f
 690 #define TARGET_OS_SYSV_CPP_BUILTINS()           \
 691   do                                            \
 692     {                                           \
 693       if (flag_pic == 1)                        \
 694         {                                       \
 695           builtin_define ("__pic__=1");         \
 696           builtin_define ("__PIC__=1");         \
 697         }                                       \
 698       else if (flag_pic == 2)                   \
 699         {                                       \
 700           builtin_define ("__pic__=2");         \
 701           builtin_define ("__PIC__=2");         \
 702         }                                       \
 703       if (target_flags_explicit                 \
 704           & MASK_RELOCATABLE)                   \
 705         builtin_define ("_RELOCATABLE");        \
 706     }                                           \
 707   while (0)
 708
 709 #ifndef TARGET_OS_CPP_BUILTINS
 710 #define TARGET_OS_CPP_BUILTINS()                \
 711   do                                            \
 712     {                                           \
 713       builtin_define_std ("PPC");               \
 714       builtin_define_std ("unix");              \
 715       builtin_define ("__svr4__");              \
 716       builtin_assert ("system=unix");           \
 717       builtin_assert ("system=svr4");           \
 718       builtin_assert ("cpu=powerpc");           \
 719       builtin_assert ("machine=powerpc");       \
 720       TARGET_OS_SYSV_CPP_BUILTINS ();           \
 721     }                                           \
 722   while (0)
 723 #endif
 724
 725 /* Pass various options to the assembler.  */
 726 /* Override svr4.h definition.  */
 727 #undef  ASM_SPEC
 728 #define ASM_SPEC "%(asm_cpu) \
 729 %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
 730 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
 731 %{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \
 732 %{memb|msdata|msdata=eabi: -memb} \
 733 %{mlittle|mlittle-endian:-mlittle; \
 734   mbig|mbig-endian      :-mbig;    \
 735   mcall-aixdesc |                  \
 736   mcall-freebsd |                  \
 737   mcall-netbsd  |                  \
 738   mcall-openbsd |                  \
 739   mcall-linux   |                  \
 740   mcall-gnu             :-mbig;    \
 741   mcall-i960-old        :-mlittle}"
 742
 743 #define CC1_ENDIAN_BIG_SPEC ""
 744
 745 #define CC1_ENDIAN_LITTLE_SPEC "\
 746 %{!mstrict-align: %{!mno-strict-align: \
 747     %{!mcall-i960-old: \
 748         -mstrict-align \
 749     } \
 750 }}"
 751
 752 #define CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"
 753
 754 #ifndef CC1_SECURE_PLT_DEFAULT_SPEC
 755 #define CC1_SECURE_PLT_DEFAULT_SPEC ""
 756 #endif
 757
 758 /* Pass -G xxx to the compiler and set correct endian mode.  */
 759 #define CC1_SPEC "%{G*} \
 760 %{mlittle|mlittle-endian: %(cc1_endian_little);           \
 761   mbig   |mbig-endian   : %(cc1_endian_big);              \
 762   mcall-aixdesc |                                         \
 763   mcall-freebsd |                                         \
 764   mcall-netbsd  |                                         \
 765   mcall-openbsd |                                         \
 766   mcall-linux   |                                         \
 767   mcall-gnu             : -mbig %(cc1_endian_big);        \
 768   mcall-i960-old        : -mlittle %(cc1_endian_little);  \
 769                         : %(cc1_endian_default)}          \
 770 %{meabi: %{!mcall-*: -mcall-sysv }} \
 771 %{!meabi: %{!mno-eabi: \
 772     %{mrelocatable: -meabi } \
 773     %{mcall-freebsd: -mno-eabi } \
 774     %{mcall-i960-old: -meabi } \
 775     %{mcall-linux: -mno-eabi } \
 776     %{mcall-gnu: -mno-eabi } \
 777     %{mcall-netbsd: -mno-eabi } \
 778     %{mcall-openbsd: -mno-eabi }}} \
 779 %{msdata: -msdata=default} \
 780 %{mno-sdata: -msdata=none} \
 781 %{!mbss-plt: %{!msecure-plt: %(cc1_secure_plt_default)}} \
 782 %{profile: -p}"
 783
 784 /* Don't put -Y P,<path> for cross compilers.  */
 785 #ifndef CROSS_COMPILE
 786 #define LINK_PATH_SPEC "\
 787 %{!R*:%{L*:-R %*}} \
 788 %{!nostdlib: %{!YP,*: \
 789     %{compat-bsd: \
 790         %{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 791         %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}} \
 792         %{!R*: %{!L*: -R /usr/ucblib}} \
 793     %{!compat-bsd: \
 794         %{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 795         %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}}"
 796
 797 #else
 798 #define LINK_PATH_SPEC ""
 799 #endif
 800
 801 /* Default starting address if specified.  */
 802 #define LINK_START_SPEC "\
 803 %{mads         : %(link_start_ads)         ; \
 804   myellowknife : %(link_start_yellowknife) ; \
 805   mmvme        : %(link_start_mvme)        ; \
 806   msim         : %(link_start_sim)         ; \
 807   mwindiss     : %(link_start_windiss)     ; \
 808   mcall-freebsd: %(link_start_freebsd)     ; \
 809   mcall-linux  : %(link_start_linux)       ; \
 810   mcall-gnu    : %(link_start_gnu)         ; \
 811   mcall-netbsd : %(link_start_netbsd)      ; \
 812   mcall-openbsd: %(link_start_openbsd)     ; \
 813                : %(link_start_default)     }"
 814
 815 #define LINK_START_DEFAULT_SPEC ""
 816
 817 /* Override svr4.h definition.  */
 818 #undef  LINK_SPEC
 819 #define LINK_SPEC "\
 820 %{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
 821 %{YP,*} %{R*} \
 822 %{Qy:} %{!Qn:-Qy} \
 823 %(link_shlib) \
 824 %{!Wl,-T*: %{!T*: %(link_start) }} \
 825 %(link_target) \
 826 %(link_os)"
 827
 828 /* For now, turn off shared libraries by default.  */
 829 #ifndef SHARED_LIB_SUPPORT
 830 #define NO_SHARED_LIB_SUPPORT
 831 #endif
 832
 833 #ifndef NO_SHARED_LIB_SUPPORT
 834 /* Shared libraries are default.  */
 835 #define LINK_SHLIB_SPEC "\
 836 %{!static: %(link_path) %{!R*:%{L*:-R %*}}} \
 837 %{mshlib: } \
 838 %{static:-dn -Bstatic} \
 839 %{shared:-G -dy -z text} \
 840 %{symbolic:-Bsymbolic -G -dy -z text}"
 841
 842 #else
 843 /* Shared libraries are not default.  */
 844 #define LINK_SHLIB_SPEC "\
 845 %{mshlib: %(link_path) } \
 846 %{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
 847 %{static: } \
 848 %{shared:-G -dy -z text %(link_path) } \
 849 %{symbolic:-Bsymbolic -G -dy -z text %(link_path) }"
 850 #endif
 851
 852 /* Override the default target of the linker.  */
 853 #define LINK_TARGET_SPEC "\
 854 %{mlittle: --oformat elf32-powerpcle } %{mlittle-endian: --oformat elf32-powerpcle } \
 855 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
 856     %{mcall-i960-old: --oformat elf32-powerpcle} \
 857   }}}}"
 858
 859 /* Any specific OS flags.  */
 860 #define LINK_OS_SPEC "\
 861 %{mads         : %(link_os_ads)         ; \
 862   myellowknife : %(link_os_yellowknife) ; \
 863   mmvme        : %(link_os_mvme)        ; \
 864   msim         : %(link_os_sim)         ; \
 865   mwindiss     : %(link_os_windiss)     ; \
 866   mcall-freebsd: %(link_os_freebsd)     ; \
 867   mcall-linux  : %(link_os_linux)       ; \
 868   mcall-gnu    : %(link_os_gnu)         ; \
 869   mcall-netbsd : %(link_os_netbsd)      ; \
 870   mcall-openbsd: %(link_os_openbsd)     ; \
 871                : %(link_os_default)     }"
 872
 873 #define LINK_OS_DEFAULT_SPEC ""
 874
 875 /* Override rs6000.h definition.  */
 876 #undef  CPP_SPEC
 877 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE} \
 878 %{mads         : %(cpp_os_ads)         ; \
 879   myellowknife : %(cpp_os_yellowknife) ; \
 880   mmvme        : %(cpp_os_mvme)        ; \
 881   msim         : %(cpp_os_sim)         ; \
 882   mwindiss     : %(cpp_os_windiss)     ; \
 883   mcall-freebsd: %(cpp_os_freebsd)     ; \
 884   mcall-linux  : %(cpp_os_linux)       ; \
 885   mcall-gnu    : %(cpp_os_gnu)         ; \
 886   mcall-netbsd : %(cpp_os_netbsd)      ; \
 887   mcall-openbsd: %(cpp_os_openbsd)     ; \
 888                : %(cpp_os_default)     }"
 889
 890 #define CPP_OS_DEFAULT_SPEC ""
 891
 892 /* Override svr4.h definition.  */
 893 #undef  STARTFILE_SPEC
 894 #define STARTFILE_SPEC "\
 895 %{mads         : %(startfile_ads)         ; \
 896   myellowknife : %(startfile_yellowknife) ; \
 897   mmvme        : %(startfile_mvme)        ; \
 898   msim         : %(startfile_sim)         ; \
 899   mwindiss     : %(startfile_windiss)     ; \
 900   mcall-freebsd: %(startfile_freebsd)     ; \
 901   mcall-linux  : %(startfile_linux)       ; \
 902   mcall-gnu    : %(startfile_gnu)         ; \
 903   mcall-netbsd : %(startfile_netbsd)      ; \
 904   mcall-openbsd: %(startfile_openbsd)     ; \
 905                : %(startfile_default)     }"
 906
 907 #define STARTFILE_DEFAULT_SPEC ""
 908
 909 /* Override svr4.h definition.  */
 910 #undef  LIB_SPEC
 911 #define LIB_SPEC "\
 912 %{mads         : %(lib_ads)         ; \
 913   myellowknife : %(lib_yellowknife) ; \
 914   mmvme        : %(lib_mvme)        ; \
 915   msim         : %(lib_sim)         ; \
 916   mwindiss     : %(lib_windiss)     ; \
 917   mcall-freebsd: %(lib_freebsd)     ; \
 918   mcall-linux  : %(lib_linux)       ; \
 919   mcall-gnu    : %(lib_gnu)         ; \
 920   mcall-netbsd : %(lib_netbsd)      ; \
 921   mcall-openbsd: %(lib_openbsd)     ; \
 922                : %(lib_default)     }"
 923
 924 #define LIB_DEFAULT_SPEC ""
 925
 926 /* Override svr4.h definition.  */
 927 #undef  ENDFILE_SPEC
 928 #define ENDFILE_SPEC "\
 929 %{mads         : crtsavres.o%s        %(endfile_ads)         ; \
 930   myellowknife : crtsavres.o%s        %(endfile_yellowknife) ; \
 931   mmvme        : crtsavres.o%s        %(endfile_mvme)        ; \
 932   msim         : crtsavres.o%s        %(endfile_sim)         ; \
 933   mwindiss     :                      %(endfile_windiss)     ; \
 934   mcall-freebsd: crtsavres.o%s        %(endfile_freebsd)     ; \
 935   mcall-linux  : crtsavres.o%s        %(endfile_linux)       ; \
 936   mcall-gnu    : crtsavres.o%s        %(endfile_gnu)         ; \
 937   mcall-netbsd : crtsavres.o%s        %(endfile_netbsd)      ; \
 938   mcall-openbsd: crtsavres.o%s        %(endfile_openbsd)     ; \
 939                : %(crtsavres_default) %(endfile_default)     }"
 940
 941 #define CRTSAVRES_DEFAULT_SPEC "crtsavres.o%s"
 942
 943 #define ENDFILE_DEFAULT_SPEC ""
 944
 945 /* Motorola ADS support.  */
 946 #define LIB_ADS_SPEC "--start-group -lads -lc --end-group"
 947
 948 #define STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 949
 950 #define ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"
 951
 952 #define LINK_START_ADS_SPEC "-T ads.ld%s"
 953
 954 #define LINK_OS_ADS_SPEC ""
 955
 956 #define CPP_OS_ADS_SPEC ""
 957
 958 /* Motorola Yellowknife support.  */
 959 #define LIB_YELLOWKNIFE_SPEC "--start-group -lyk -lc --end-group"
 960
 961 #define STARTFILE_YELLOWKNIFE_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 962
 963 #define ENDFILE_YELLOWKNIFE_SPEC "crtend.o%s ecrtn.o%s"
 964
 965 #define LINK_START_YELLOWKNIFE_SPEC "-T yellowknife.ld%s"
 966
 967 #define LINK_OS_YELLOWKNIFE_SPEC ""
 968
 969 #define CPP_OS_YELLOWKNIFE_SPEC ""
 970
 971 /* Motorola MVME support.  */
 972 #define LIB_MVME_SPEC "--start-group -lmvme -lc --end-group"
 973
 974 #define STARTFILE_MVME_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
 975
 976 #define ENDFILE_MVME_SPEC "crtend.o%s ecrtn.o%s"
 977
 978 #define LINK_START_MVME_SPEC "-Ttext 0x40000"
 979
 980 #define LINK_OS_MVME_SPEC ""
 981
 982 #define CPP_OS_MVME_SPEC ""
 983
 984 /* PowerPC simulator based on netbsd system calls support.  */
 985 #define LIB_SIM_SPEC "--start-group -lsim -lc --end-group"
 986
 987 #define STARTFILE_SIM_SPEC "ecrti.o%s sim-crt0.o%s crtbegin.o%s"
 988
 989 #define ENDFILE_SIM_SPEC "crtend.o%s ecrtn.o%s"
 990
 991 #define LINK_START_SIM_SPEC ""
 992
 993 #define LINK_OS_SIM_SPEC "-m elf32ppcsim"
 994
 995 #define CPP_OS_SIM_SPEC ""
 996
 997 /* FreeBSD support.  */
 998
 999 #define CPP_OS_FREEBSD_SPEC     "\
1000   -D__PPC__ -D__ppc__ -D__PowerPC__ -D__powerpc__ \
1001   -Acpu=powerpc -Amachine=powerpc"
1002
1003 #define STARTFILE_FREEBSD_SPEC  FBSD_STARTFILE_SPEC
1004 #define ENDFILE_FREEBSD_SPEC    FBSD_ENDFILE_SPEC
1005 #define LIB_FREEBSD_SPEC        FBSD_LIB_SPEC
1006 #define LINK_START_FREEBSD_SPEC ""
1007
1008 #define LINK_OS_FREEBSD_SPEC "\
1009   %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
1010   %{Wl,*:%*} \
1011   %{v:-V} \
1012   %{assert*} %{R*} %{rpath*} %{defsym*} \
1013   %{shared:-Bshareable %{h*} %{soname*}} \
1014   %{!shared: \
1015     %{!static: \
1016       %{rdynamic: -export-dynamic} \
1017       %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
1018     %{static:-Bstatic}} \
1019   %{symbolic:-Bsymbolic}"
1020
1021 /* GNU/Linux support.  */
1022 #define LIB_LINUX_SPEC "%{mnewlib: --start-group -llinux -lc --end-group } \
1023 %{!mnewlib: %{pthread:-lpthread} %{shared:-lc} \
1024 %{!shared: %{profile:-lc_p} %{!profile:-lc}}}"
1025
1026 #ifdef HAVE_LD_PIE
1027 #define STARTFILE_LINUX_SPEC "\
1028 %{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
1029 %{mnewlib:ecrti.o%s;:crti.o%s} \
1030 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1031 #else
1032 #define STARTFILE_LINUX_SPEC "\
1033 %{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
1034 %{mnewlib:ecrti.o%s;:crti.o%s} \
1035 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1036 #endif
1037
1038 #define ENDFILE_LINUX_SPEC "\
1039 %{shared|pie:crtendS.o%s;:crtend.o%s} \
1040 %{mnewlib:ecrtn.o%s;:crtn.o%s}"
1041
1042 #define LINK_START_LINUX_SPEC ""
1043
1044 #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1045   %{rdynamic:-export-dynamic} \
1046   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1047
1048 #if defined(HAVE_LD_EH_FRAME_HDR)
1049 # define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
1050 #endif
1051
1052 #define CPP_OS_LINUX_SPEC "-D__unix__ -D__gnu_linux__ -D__linux__ \
1053 %{!undef:                                                         \
1054   %{!ansi:                                                        \
1055     %{!std=*:-Dunix -D__unix -Dlinux -D__linux}                   \
1056     %{std=gnu*:-Dunix -D__unix -Dlinux -D__linux}}}               \
1057 -Asystem=linux -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1058
1059 /* GNU/Hurd support.  */
1060 #define LIB_GNU_SPEC "%{mnewlib: --start-group -lgnu -lc --end-group } \
1061 %{!mnewlib: %{shared:-lc} %{!shared: %{pthread:-lpthread } \
1062 %{profile:-lc_p} %{!profile:-lc}}}"
1063
1064 #define STARTFILE_GNU_SPEC "\
1065 %{!shared: %{!static: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}} \
1066 %{static: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1067 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1068 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1069
1070 #define ENDFILE_GNU_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1071 %{mnewlib: ecrtn.o%s} %{!mnewlib: crtn.o%s}"
1072
1073 #define LINK_START_GNU_SPEC ""
1074
1075 #define LINK_OS_GNU_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1076   %{rdynamic:-export-dynamic} \
1077   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1078
1079 #define CPP_OS_GNU_SPEC "-D__unix__ -D__gnu_hurd__ -D__GNU__    \
1080 %{!undef:                                                       \
1081   %{!ansi: -Dunix -D__unix}}                                    \
1082 -Asystem=gnu -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1083
1084 /* NetBSD support.  */
1085 #define LIB_NETBSD_SPEC "\
1086 %{profile:-lgmon -lc_p} %{!profile:-lc}"
1087
1088 #define STARTFILE_NETBSD_SPEC "\
1089 ncrti.o%s crt0.o%s \
1090 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1091
1092 #define ENDFILE_NETBSD_SPEC "\
1093 %{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1094 ncrtn.o%s"
1095
1096 #define LINK_START_NETBSD_SPEC "\
1097 "
1098
1099 #define LINK_OS_NETBSD_SPEC "\
1100 %{!shared: %{!static: \
1101   %{rdynamic:-export-dynamic} \
1102   %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}}}"
1103
1104 #define CPP_OS_NETBSD_SPEC "\
1105 -D__powerpc__ -D__NetBSD__ -D__KPRINTF_ATTRIBUTE__"
1106
1107 /* OpenBSD support.  */
1108 #ifndef LIB_OPENBSD_SPEC
1109 #define LIB_OPENBSD_SPEC "%{!shared:%{pthread:-lpthread%{p:_p}%{!p:%{pg:_p}}}} %{!shared:-lc%{p:_p}%{!p:%{pg:_p}}}"
1110 #endif
1111
1112 #ifndef STARTFILE_OPENBSD_SPEC
1113 #define STARTFILE_OPENBSD_SPEC "\
1114 %{!shared: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1115 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1116 #endif
1117
1118 #ifndef ENDFILE_OPENBSD_SPEC
1119 #define ENDFILE_OPENBSD_SPEC "\
1120 %{!shared:crtend.o%s} %{shared:crtendS.o%s}"
1121 #endif
1122
1123 #ifndef LINK_START_OPENBSD_SPEC
1124 #define LINK_START_OPENBSD_SPEC "-Ttext 0x400074"
1125 #endif
1126
1127 #ifndef LINK_OS_OPENBSD_SPEC
1128 #define LINK_OS_OPENBSD_SPEC ""
1129 #endif
1130
1131 #ifndef CPP_OS_OPENBSD_SPEC
1132 #define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
1133 #endif
1134
1135 /* WindISS support.  */
1136
1137 #define LIB_WINDISS_SPEC "--start-group -li -lcfp -lwindiss -lram -limpl -limpfp --end-group"
1138
1139 #define CPP_OS_WINDISS_SPEC "\
1140 -D__rtasim \
1141 -D__EABI__ \
1142 -D__ppc \
1143 %{!msoft-float: -D__hardfp} \
1144 "
1145
1146 #define STARTFILE_WINDISS_SPEC "crt0.o%s crtbegin.o%s"
1147
1148 #define ENDFILE_WINDISS_SPEC "crtend.o%s"
1149
1150 #define LINK_START_WINDISS_SPEC ""
1151
1152 #define LINK_OS_WINDISS_SPEC ""
1153
1154 /* Define any extra SPECS that the compiler needs to generate.  */
1155 /* Override rs6000.h definition.  */
1156 #undef  SUBTARGET_EXTRA_SPECS
1157 #define SUBTARGET_EXTRA_SPECS                                           \
1158   { "crtsavres_default",        CRTSAVRES_DEFAULT_SPEC },               \
1159   { "lib_ads",                  LIB_ADS_SPEC },                         \
1160   { "lib_yellowknife",          LIB_YELLOWKNIFE_SPEC },                 \
1161   { "lib_mvme",                 LIB_MVME_SPEC },                        \
1162   { "lib_sim",                  LIB_SIM_SPEC },                         \
1163   { "lib_freebsd",              LIB_FREEBSD_SPEC },                     \
1164   { "lib_gnu",                  LIB_GNU_SPEC },                         \
1165   { "lib_linux",                LIB_LINUX_SPEC },                       \
1166   { "lib_netbsd",               LIB_NETBSD_SPEC },                      \
1167   { "lib_openbsd",              LIB_OPENBSD_SPEC },                     \
1168   { "lib_windiss",              LIB_WINDISS_SPEC },                     \
1169   { "lib_default",              LIB_DEFAULT_SPEC },                     \
1170   { "startfile_ads",            STARTFILE_ADS_SPEC },                   \
1171   { "startfile_yellowknife",    STARTFILE_YELLOWKNIFE_SPEC },           \
1172   { "startfile_mvme",           STARTFILE_MVME_SPEC },                  \
1173   { "startfile_sim",            STARTFILE_SIM_SPEC },                   \
1174   { "startfile_freebsd",        STARTFILE_FREEBSD_SPEC },               \
1175   { "startfile_gnu",            STARTFILE_GNU_SPEC },                   \
1176   { "startfile_linux",          STARTFILE_LINUX_SPEC },                 \
1177   { "startfile_netbsd",         STARTFILE_NETBSD_SPEC },                \
1178   { "startfile_openbsd",        STARTFILE_OPENBSD_SPEC },               \
1179   { "startfile_windiss",        STARTFILE_WINDISS_SPEC },               \
1180   { "startfile_default",        STARTFILE_DEFAULT_SPEC },               \
1181   { "endfile_ads",              ENDFILE_ADS_SPEC },                     \
1182   { "endfile_yellowknife",      ENDFILE_YELLOWKNIFE_SPEC },             \
1183   { "endfile_mvme",             ENDFILE_MVME_SPEC },                    \
1184   { "endfile_sim",              ENDFILE_SIM_SPEC },                     \
1185   { "endfile_freebsd",          ENDFILE_FREEBSD_SPEC },                 \
1186   { "endfile_gnu",              ENDFILE_GNU_SPEC },                     \
1187   { "endfile_linux",            ENDFILE_LINUX_SPEC },                   \
1188   { "endfile_netbsd",           ENDFILE_NETBSD_SPEC },                  \
1189   { "endfile_openbsd",          ENDFILE_OPENBSD_SPEC },                 \
1190   { "endfile_windiss",          ENDFILE_WINDISS_SPEC },                 \
1191   { "endfile_default",          ENDFILE_DEFAULT_SPEC },                 \
1192   { "link_path",                LINK_PATH_SPEC },                       \
1193   { "link_shlib",               LINK_SHLIB_SPEC },                      \
1194   { "link_target",              LINK_TARGET_SPEC },                     \
1195   { "link_start",               LINK_START_SPEC },                      \
1196   { "link_start_ads",           LINK_START_ADS_SPEC },                  \
1197   { "link_start_yellowknife",   LINK_START_YELLOWKNIFE_SPEC },          \
1198   { "link_start_mvme",          LINK_START_MVME_SPEC },                 \
1199   { "link_start_sim",           LINK_START_SIM_SPEC },                  \
1200   { "link_start_freebsd",       LINK_START_FREEBSD_SPEC },              \
1201   { "link_start_gnu",           LINK_START_GNU_SPEC },                  \
1202   { "link_start_linux",         LINK_START_LINUX_SPEC },                \
1203   { "link_start_netbsd",        LINK_START_NETBSD_SPEC },               \
1204   { "link_start_openbsd",       LINK_START_OPENBSD_SPEC },              \
1205   { "link_start_windiss",       LINK_START_WINDISS_SPEC },              \
1206   { "link_start_default",       LINK_START_DEFAULT_SPEC },              \
1207   { "link_os",                  LINK_OS_SPEC },                         \
1208   { "link_os_ads",              LINK_OS_ADS_SPEC },                     \
1209   { "link_os_yellowknife",      LINK_OS_YELLOWKNIFE_SPEC },             \
1210   { "link_os_mvme",             LINK_OS_MVME_SPEC },                    \
1211   { "link_os_sim",              LINK_OS_SIM_SPEC },                     \
1212   { "link_os_freebsd",          LINK_OS_FREEBSD_SPEC },                 \
1213   { "link_os_linux",            LINK_OS_LINUX_SPEC },                   \
1214   { "link_os_gnu",              LINK_OS_GNU_SPEC },                     \
1215   { "link_os_netbsd",           LINK_OS_NETBSD_SPEC },                  \
1216   { "link_os_openbsd",          LINK_OS_OPENBSD_SPEC },                 \
1217   { "link_os_windiss",          LINK_OS_WINDISS_SPEC },                 \
1218   { "link_os_default",          LINK_OS_DEFAULT_SPEC },                 \
1219   { "cc1_endian_big",           CC1_ENDIAN_BIG_SPEC },                  \
1220   { "cc1_endian_little",        CC1_ENDIAN_LITTLE_SPEC },               \
1221   { "cc1_endian_default",       CC1_ENDIAN_DEFAULT_SPEC },              \
1222   { "cc1_secure_plt_default",   CC1_SECURE_PLT_DEFAULT_SPEC },          \
1223   { "cpp_os_ads",               CPP_OS_ADS_SPEC },                      \
1224   { "cpp_os_yellowknife",       CPP_OS_YELLOWKNIFE_SPEC },              \
1225   { "cpp_os_mvme",              CPP_OS_MVME_SPEC },                     \
1226   { "cpp_os_sim",               CPP_OS_SIM_SPEC },                      \
1227   { "cpp_os_freebsd",           CPP_OS_FREEBSD_SPEC },                  \
1228   { "cpp_os_gnu",               CPP_OS_GNU_SPEC },                      \
1229   { "cpp_os_linux",             CPP_OS_LINUX_SPEC },                    \
1230   { "cpp_os_netbsd",            CPP_OS_NETBSD_SPEC },                   \
1231   { "cpp_os_openbsd",           CPP_OS_OPENBSD_SPEC },                  \
1232   { "cpp_os_windiss",           CPP_OS_WINDISS_SPEC },                  \
1233   { "cpp_os_default",           CPP_OS_DEFAULT_SPEC },                  \
1234   { "fbsd_dynamic_linker",      FBSD_DYNAMIC_LINKER },                  \
1235   SUBSUBTARGET_EXTRA_SPECS
1236
1237 #define SUBSUBTARGET_EXTRA_SPECS
1238
1239 /* Define this macro as a C expression for the initializer of an
1240    array of string to tell the driver program which options are
1241    defaults for this target and thus do not need to be handled
1242    specially when using `MULTILIB_OPTIONS'.
1243
1244    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
1245    the target makefile fragment or if none of the options listed in
1246    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
1247
1248 #define MULTILIB_DEFAULTS { "mbig", "mcall-sysv" }
1249
1250 /* Define this macro if the code for function profiling should come
1251    before the function prologue.  Normally, the profiling code comes
1252    after.  */
1253 #define PROFILE_BEFORE_PROLOGUE 1
1254
1255 /* Function name to call to do profiling.  */
1256 #define RS6000_MCOUNT "_mcount"
1257
1258 /* Define this macro (to a value of 1) if you want to support the
1259    Win32 style pragmas #pragma pack(push,<n>)' and #pragma
1260    pack(pop)'.  The pack(push,<n>) pragma specifies the maximum
1261    alignment (in bytes) of fields within a structure, in much the
1262    same way as the __aligned__' and __packed__' __attribute__'s
1263    do.  A pack value of zero resets the behavior to the default.
1264    Successive invocations of this pragma cause the previous values to
1265    be stacked, so that invocations of #pragma pack(pop)' will return
1266    to the previous value.  */
1267
1268 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
1269
1270 /* Select a format to encode pointers in exception handling data.  CODE
1271    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
1272    true if the symbol may be affected by dynamic relocations.  */
1273 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                            \
1274   ((flag_pic || TARGET_RELOCATABLE)                                          \
1275    ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
1276    : DW_EH_PE_absptr)
1277
1278 #define DOUBLE_INT_ASM_OP "\t.quad\t"
1279
1280 /* Generate entries in .fixup for relocatable addresses.  */
1281 #define RELOCATABLE_NEEDS_FIXUP 1
1282
1283 /* This target uses the sysv4.opt file.  */
1284 #define TARGET_USES_SYSV4_OPT 1