boehm-gc/gcconfig.h

   1 /*
   2  * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
   3  * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
   4  * Copyright (c) 1996 by Silicon Graphics.  All rights reserved.
   5  *
   6  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
   7  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
   8  *
   9  * Permission is hereby granted to use or copy this program
  10  * for any purpose,  provided the above notices are retained on all copies.
  11  * Permission to modify the code and to distribute modified code is granted,
  12  * provided the above notices are retained, and a notice that the code was
  13  * modified is included with the above copyright notice.
  14  */
  15
  16 #ifndef GCCONFIG_H
  17
  18 # define GCCONFIG_H
  19
  20 /* Machine dependent parameters.  Some tuning parameters can be found   */
  21 /* near the top of gc_private.h.                                        */
  22
  23 /* Machine specific parts contributed by various people.  See README file. */
  24
  25 /* First a unified test for Linux: */
  26 # if defined(linux) || defined(__linux__)
  27 #    define LINUX
  28 # endif
  29
  30 /* Determine the machine type: */
  31 # if defined(sun) && defined(mc68000)
  32 #    define M68K
  33 #    define SUNOS4
  34 #    define mach_type_known
  35 # endif
  36 # if defined(hp9000s300)
  37 #    define M68K
  38 #    define HP
  39 #    define mach_type_known
  40 # endif
  41 # if defined(__OpenBSD__) && defined(m68k)
  42 #    define M68K
  43 #    define OPENBSD
  44 #    define mach_type_known
  45 # endif
  46 # if defined(__OpenBSD__) && defined(__sparc__)
  47 #    define SPARC
  48 #    define OPENBSD
  49 #    define mach_type_known
  50 # endif
  51 # if defined(__NetBSD__) && defined(m68k)
  52 #    define M68K
  53 #    define NETBSD
  54 #    define mach_type_known
  55 # endif
  56 # if defined(__NetBSD__) && defined(arm32)
  57 #    define ARM32
  58 #    define NETBSD
  59 #    define mach_type_known
  60 # endif
  61 # if defined(vax)
  62 #    define VAX
  63 #    ifdef ultrix
  64 #       define ULTRIX
  65 #    else
  66 #       define BSD
  67 #    endif
  68 #    define mach_type_known
  69 # endif
  70 # if defined(mips) || defined(__mips)
  71 #    define MIPS
  72 #    if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
  73 #       define ULTRIX
  74 #    else
  75 #       if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) || defined(__SYSTYPE_SVR4__)
  76 #         define IRIX5   /* or IRIX 6.X */
  77 #       else
  78 #         define RISCOS  /* or IRIX 4.X */
  79 #       endif
  80 #    endif
  81 #    define mach_type_known
  82 # endif
  83 # if defined(sequent) && defined(i386)
  84 #    define I386
  85 #    define SEQUENT
  86 #    define mach_type_known
  87 # endif
  88 # if defined(sun) && defined(i386)
  89 #    define I386
  90 #    define SUNOS5
  91 #    define mach_type_known
  92 # endif
  93 # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
  94 #    define I386
  95 #    define OS2
  96 #    define mach_type_known
  97 # endif
  98 # if defined(ibm032)
  99 #   define RT
 100 #   define mach_type_known
 101 # endif
 102 # if defined(sun) && (defined(sparc) || defined(__sparc))
 103 #   define SPARC
 104     /* Test for SunOS 5.x */
 105 #     include <errno.h>
 106 #     ifdef ECHRNG
 107 #       define SUNOS5
 108 #     else
 109 #       define SUNOS4
 110 #     endif
 111 #   define mach_type_known
 112 # endif
 113 # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
 114      && !defined(__OpenBSD__)
 115 #   define SPARC
 116 #   define DRSNX
 117 #   define mach_type_known
 118 # endif
 119 # if defined(_IBMR2)
 120 #   define RS6000
 121 #   define mach_type_known
 122 # endif
 123 # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
 124         /* The above test may need refinement   */
 125 #   define I386
 126 #   if defined(_SCO_ELF)
 127 #     define SCO_ELF
 128 #   else
 129 #     define SCO
 130 #   endif
 131 #   define mach_type_known
 132 # endif
 133 # if defined(_AUX_SOURCE)
 134 #   define M68K
 135 #   define SYSV
 136 #   define mach_type_known
 137 # endif
 138 # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
 139      || defined(hppa) || defined(__hppa__)
 140 #   define HP_PA
 141 #   ifndef LINUX
 142 #     define HPUX
 143 #   endif
 144 #   define mach_type_known
 145 # endif
 146 # if defined(LINUX) && (defined(i386) || defined(__i386__))
 147 #    define I386
 148 #    define mach_type_known
 149 # endif
 150 # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
 151 #    define IA64
 152 #    define mach_type_known
 153 # endif
 154 # if defined(LINUX) && defined(powerpc)
 155 #    define POWERPC
 156 #    define mach_type_known
 157 # endif
 158 # if defined(LINUX) && defined(__mc68000__)
 159 #    define M68K
 160 #    define mach_type_known
 161 # endif
 162 # if defined(LINUX) && defined(sparc)
 163 #    define SPARC
 164 #    define mach_type_known
 165 # endif
 166 # if defined(__alpha) || defined(__alpha__)
 167 #   define ALPHA
 168 #   if !defined(LINUX)
 169 #     define OSF1       /* a.k.a Digital Unix */
 170 #   endif
 171 #   define mach_type_known
 172 # endif
 173 # if defined(_AMIGA) && !defined(AMIGA)
 174 #   define AMIGA
 175 # endif
 176 # ifdef AMIGA
 177 #   define M68K
 178 #   define mach_type_known
 179 # endif
 180 # if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
 181 #   define M68K
 182 #   define MACOS
 183 #   define mach_type_known
 184 # endif
 185 # if defined(__MWERKS__) && defined(__powerc)
 186 #   define POWERPC
 187 #   define MACOS
 188 #   define mach_type_known
 189 # endif
 190 # if defined(macosx)
 191 #    define MACOSX
 192 #    define POWERPC
 193 #    define mach_type_known
 194 # endif
 195 # if defined(NeXT) && defined(mc68000)
 196 #   define M68K
 197 #   define NEXT
 198 #   define mach_type_known
 199 # endif
 200 # if defined(NeXT) && defined(i386)
 201 #   define I386
 202 #   define NEXT
 203 #   define mach_type_known
 204 # endif
 205 # if defined(__OpenBSD__) && defined(i386)
 206 #   define I386
 207 #   define OPENBSD
 208 #   define mach_type_known
 209 # endif
 210 # if defined(__FreeBSD__) && defined(i386)
 211 #   define I386
 212 #   define FREEBSD
 213 #   define mach_type_known
 214 # endif
 215 # if defined(__NetBSD__) && defined(i386)
 216 #   define I386
 217 #   define NETBSD
 218 #   define mach_type_known
 219 # endif
 220 # if defined(bsdi) && defined(i386)
 221 #    define I386
 222 #    define BSDI
 223 #    define mach_type_known
 224 # endif
 225 # if !defined(mach_type_known) && defined(__386BSD__)
 226 #   define I386
 227 #   define THREE86BSD
 228 #   define mach_type_known
 229 # endif
 230 # if defined(_CX_UX) && defined(_M88K)
 231 #   define M88K
 232 #   define CX_UX
 233 #   define mach_type_known
 234 # endif
 235 # if defined(DGUX)
 236 #   define M88K
 237     /* DGUX defined */
 238 #   define mach_type_known
 239 # endif
 240 # if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
 241      || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
 242 #   define I386
 243 #   define MSWIN32      /* or Win32s */
 244 #   define mach_type_known
 245 # endif
 246 # if defined(__DJGPP__)
 247 #   define I386
 248 #   ifndef DJGPP
 249 #     define DJGPP  /* MSDOS running the DJGPP port of GCC */
 250 #   endif
 251 #   define mach_type_known
 252 # endif
 253 # if defined(__CYGWIN32__) || defined(__CYGWIN__)
 254 #   define I386
 255 #   define CYGWIN32
 256 #   define mach_type_known
 257 # endif
 258 # if defined(__BORLANDC__)
 259 #   define I386
 260 #   define MSWIN32
 261 #   define mach_type_known
 262 # endif
 263 # if defined(_UTS) && !defined(mach_type_known)
 264 #   define S370
 265 #   define UTS4
 266 #   define mach_type_known
 267 # endif
 268 # if defined(__pj__)
 269 #   define PJ
 270 #   define mach_type_known
 271 # endif
 272 /* Ivan Demakov */
 273 # if defined(__WATCOMC__) && defined(__386__)
 274 #   define I386
 275 #   if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
 276 #     if defined(__OS2__)
 277 #       define OS2
 278 #     else
 279 #       if defined(__WINDOWS_386__) || defined(__NT__)
 280 #         define MSWIN32
 281 #       else
 282 #         define DOS4GW
 283 #       endif
 284 #     endif
 285 #   endif
 286 #   define mach_type_known
 287 # endif
 288
 289 /* Feel free to add more clauses here */
 290
 291 /* Or manually define the machine type here.  A machine type is         */
 292 /* characterized by the architecture.  Some                             */
 293 /* machine types are further subdivided by OS.                          */
 294 /* the macros ULTRIX, RISCOS, and BSD to distinguish.                   */
 295 /* Note that SGI IRIX is treated identically to RISCOS.                 */
 296 /* SYSV on an M68K actually means A/UX.                                 */
 297 /* The distinction in these cases is usually the stack starting address */
 298 # ifndef mach_type_known
 299         --> unknown machine type
 300 # endif
 301                     /* Mapping is: M68K       ==> Motorola 680X0        */
 302                     /*             (SUNOS4,HP,NEXT, and SYSV (A/UX),    */
 303                     /*             MACOS and AMIGA variants)            */
 304                     /*             I386       ==> Intel 386             */
 305                     /*              (SEQUENT, OS2, SCO, LINUX, NETBSD,  */
 306                     /*               FREEBSD, THREE86BSD, MSWIN32,      */
 307                     /*               BSDI,SUNOS5, NEXT, other variants) */
 308                     /*             NS32K      ==> Encore Multimax       */
 309                     /*             MIPS       ==> R2000 or R3000        */
 310                     /*                  (RISCOS, ULTRIX variants)       */
 311                     /*             VAX        ==> DEC VAX               */
 312                     /*                  (BSD, ULTRIX variants)          */
 313                     /*             RS6000     ==> IBM RS/6000 AIX3.X    */
 314                     /*             RT         ==> IBM PC/RT             */
 315                     /*             HP_PA      ==> HP9000/700 & /800     */
 316                     /*                            HP/UX                 */
 317                     /*             SPARC      ==> SPARC under SunOS     */
 318                     /*                  (SUNOS4, SUNOS5,                */
 319                     /*                   DRSNX variants)                */
 320                     /*             ALPHA      ==> DEC Alpha             */
 321                     /*                  (OSF1 and LINUX variants)       */
 322                     /*             M88K       ==> Motorola 88XX0        */
 323                     /*                  (CX_UX and DGUX)                */
 324                     /*             S370       ==> 370-like machine      */
 325                     /*                  running Amdahl UTS4             */
 326
 327
 328 /*
 329  * For each architecture and OS, the following need to be defined:
 330  *
 331  * CPP_WORD_SZ is a simple integer constant representing the word size.
 332  * in bits.  We assume byte addressibility, where a byte has 8 bits.
 333  * We also assume CPP_WORD_SZ is either 32 or 64.
 334  * (We care about the length of pointers, not hardware
 335  * bus widths.  Thus a 64 bit processor with a C compiler that uses
 336  * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
 337  *
 338  * MACH_TYPE is a string representation of the machine type.
 339  * OS_TYPE is analogous for the OS.
 340  *
 341  * ALIGNMENT is the largest N, such that
 342  * all pointer are guaranteed to be aligned on N byte boundaries.
 343  * defining it to be 1 will always work, but perform poorly.
 344  *
 345  * DATASTART is the beginning of the data segment.
 346  * On UNIX systems, the collector will scan the area between DATASTART
 347  * and DATAEND for root pointers.
 348  *
 349  * DATAEND, if not &end.
 350  *
 351  * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
 352  * the pointer size.
 353  *
 354  * STACKBOTTOM is the cool end of the stack, which is usually the
 355  * highest address in the stack.
 356  * Under PCR or OS/2, we have other ways of finding thread stacks.
 357  * For each machine, the following should:
 358  * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
 359  * 2) define exactly one of
 360  *      STACKBOTTOM (should be defined to be an expression)
 361  *      HEURISTIC1
 362  *      HEURISTIC2
 363  * If either of the last two macros are defined, then STACKBOTTOM is computed
 364  * during collector startup using one of the following two heuristics:
 365  * HEURISTIC1:  Take an address inside GC_init's frame, and round it up to
 366  *              the next multiple of STACK_GRAN.
 367  * HEURISTIC2:  Take an address inside GC_init's frame, increment it repeatedly
 368  *              in small steps (decrement if STACK_GROWS_UP), and read the value
 369  *              at each location.  Remember the value when the first
 370  *              Segmentation violation or Bus error is signalled.  Round that
 371  *              to the nearest plausible page boundary, and use that instead
 372  *              of STACKBOTTOM.
 373  *
 374  * If no expression for STACKBOTTOM can be found, and neither of the above
 375  * heuristics are usable, the collector can still be used with all of the above
 376  * undefined, provided one of the following is done:
 377  * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
 378  *    without reference to STACKBOTTOM.  This is appropriate for use in
 379  *    conjunction with thread packages, since there will be multiple stacks.
 380  *    (Allocating thread stacks in the heap, and treating them as ordinary
 381  *    heap data objects is also possible as a last resort.  However, this is
 382  *    likely to introduce significant amounts of excess storage retention
 383  *    unless the dead parts of the thread stacks are periodically cleared.)
 384  * 2) Client code may set GC_stackbottom before calling any GC_ routines.
 385  *    If the author of the client code controls the main program, this is
 386  *    easily accomplished by introducing a new main program, setting
 387  *    GC_stackbottom to the address of a local variable, and then calling
 388  *    the original main program.  The new main program would read something
 389  *    like:
 390  *
 391  *              # include "gc_private.h"
 392  *
 393  *              main(argc, argv, envp)
 394  *              int argc;
 395  *              char **argv, **envp;
 396  *              {
 397  *                  int dummy;
 398  *
 399  *                  GC_stackbottom = (ptr_t)(&dummy);
 400  *                  return(real_main(argc, argv, envp));
 401  *              }
 402  *
 403  *
 404  * Each architecture may also define the style of virtual dirty bit
 405  * implementation to be used:
 406  *   MPROTECT_VDB: Write protect the heap and catch faults.
 407  *   PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
 408  *
 409  * An architecture may define DYNAMIC_LOADING if dynamic_load.c
 410  * defined GC_register_dynamic_libraries() for the architecture.
 411  */
 412
 413
 414 # define STACK_GRAN 0x1000000
 415 # ifdef M68K
 416 #   define MACH_TYPE "M68K"
 417 #   define ALIGNMENT 2
 418 #   ifdef OPENBSD
 419 #       define OS_TYPE "OPENBSD"
 420 #       define HEURISTIC2
 421         extern char etext;
 422 #       define DATASTART ((ptr_t)(&etext))
 423 #   endif
 424 #   ifdef NETBSD
 425 #       define OS_TYPE "NETBSD"
 426 #       define HEURISTIC2
 427         extern char etext;
 428 #       define DATASTART ((ptr_t)(&etext))
 429 #   endif
 430 #   ifdef LINUX
 431 #       define OS_TYPE "LINUX"
 432 #       define STACKBOTTOM ((ptr_t)0xf0000000)
 433 #       define MPROTECT_VDB
 434 #       ifdef __ELF__
 435 #            define DYNAMIC_LOADING
 436              extern char **__environ;
 437 #            define DATASTART ((ptr_t)(&__environ))
 438                              /* hideous kludge: __environ is the first */
 439                              /* word in crt0.o, and delimits the start */
 440                              /* of the data segment, no matter which   */
 441                              /* ld options were passed through.        */
 442                              /* We could use _etext instead, but that  */
 443                              /* would include .rodata, which may       */
 444                              /* contain large read-only data tables    */
 445                              /* that we'd rather not scan.             */
 446              extern int _end;
 447 #            define DATAEND (&_end)
 448 #       else
 449              extern int etext;
 450 #            define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
 451 #       endif
 452 #   endif
 453 #   ifdef SUNOS4
 454 #       define OS_TYPE "SUNOS4"
 455         extern char etext;
 456 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff))
 457 #       define HEURISTIC1       /* differs      */
 458 #       define DYNAMIC_LOADING
 459 #   endif
 460 #   ifdef HP
 461 #       define OS_TYPE "HP"
 462         extern char etext;
 463 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
 464 #       define STACKBOTTOM ((ptr_t) 0xffeffffc)
 465                               /* empirically determined.  seems to work. */
 466 #       include <unistd.h>
 467 #       define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
 468 #   endif
 469 #   ifdef SYSV
 470 #       define OS_TYPE "SYSV"
 471         extern etext;
 472 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
 473                                    & ~0x3fffff) \
 474                                   +((word)&etext & 0x1fff))
 475         /* This only works for shared-text binaries with magic number 0413.
 476            The other sorts of SysV binaries put the data at the end of the text,
 477            in which case the default of &etext would work.  Unfortunately,
 478            handling both would require having the magic-number available.
 479                                 -- Parag
 480            */
 481 #       define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
 482                         /* The stack starts at the top of memory, but   */
 483                         /* 0x0 cannot be used as setjump_test complains */
 484                         /* that the stack direction is incorrect.  Two  */
 485                         /* bytes down from 0x0 should be safe enough.   */
 486                         /*              --Parag                         */
 487 #       include <sys/mmu.h>
 488 #       define GETPAGESIZE() PAGESIZE   /* Is this still right? */
 489 #   endif
 490 #   ifdef AMIGA
 491 #       define OS_TYPE "AMIGA"
 492                 /* STACKBOTTOM and DATASTART handled specially  */
 493                 /* in os_dep.c                                  */
 494 #       define DATAEND  /* not needed */
 495 #       define GETPAGESIZE() 4096
 496 #   endif
 497 #   ifdef MACOS
 498 #     ifndef __LOWMEM__
 499 #     include <LowMem.h>
 500 #     endif
 501 #     define OS_TYPE "MACOS"
 502                         /* see os_dep.c for details of global data segments. */
 503 #     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
 504 #     define DATAEND    /* not needed */
 505 #     define GETPAGESIZE() 4096
 506 #   endif
 507 #   ifdef NEXT
 508 #       define OS_TYPE "NEXT"
 509 #       define DATASTART ((ptr_t) get_etext())
 510 #       define STACKBOTTOM ((ptr_t) 0x4000000)
 511 #       define DATAEND  /* not needed */
 512 #   endif
 513 # endif
 514
 515 # ifdef POWERPC
 516 #   define MACH_TYPE "POWERPC"
 517 #   ifdef MACOS
 518 #     define ALIGNMENT 2  /* Still necessary?  Could it be 4?   */
 519 #     ifndef __LOWMEM__
 520 #     include <LowMem.h>
 521 #     endif
 522 #     define OS_TYPE "MACOS"
 523                         /* see os_dep.c for details of global data segments. */
 524 #     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
 525 #     define DATAEND  /* not needed */
 526 #   endif
 527 #   ifdef LINUX
 528 #     define ALIGNMENT 4        /* Guess.  Can someone verify?  */
 529                                 /* This was 2, but that didn't sound right. */
 530 #     define OS_TYPE "LINUX"
 531 #     define HEURISTIC1
 532 #     undef STACK_GRAN
 533 #     define STACK_GRAN 0x10000000
 534         /* Stack usually starts at 0x80000000 */
 535 #     define DATASTART GC_data_start
 536         /* Others have reported better success with */
 537         /*      extern int __data_start;            */
 538         /*#     define DATASTART (&__data_start)    */
 539         /* and disabling the GC_data_start          */
 540         /* initialization code.                     */
 541       extern int _end;
 542 #     define DATAEND (&_end)
 543 #   endif
 544 #   ifdef MACOSX
 545 #     define ALIGNMENT 4
 546 #     define OS_TYPE "MACOSX"
 547 #     define DATASTART ((ptr_t) get_etext())
 548 #     define STACKBOTTOM ((ptr_t) 0xc0000000)
 549 #     define DATAEND    /* not needed */
 550 #   endif
 551 # endif
 552
 553 # ifdef VAX
 554 #   define MACH_TYPE "VAX"
 555 #   define ALIGNMENT 4  /* Pointers are longword aligned by 4.2 C compiler */
 556     extern char etext;
 557 #   define DATASTART ((ptr_t)(&etext))
 558 #   ifdef BSD
 559 #       define OS_TYPE "BSD"
 560 #       define HEURISTIC1
 561                         /* HEURISTIC2 may be OK, but it's hard to test. */
 562 #   endif
 563 #   ifdef ULTRIX
 564 #       define OS_TYPE "ULTRIX"
 565 #       define STACKBOTTOM ((ptr_t) 0x7fffc800)
 566 #   endif
 567 # endif
 568
 569 # ifdef RT
 570 #   define MACH_TYPE "RT"
 571 #   define ALIGNMENT 4
 572 #   define DATASTART ((ptr_t) 0x10000000)
 573 #   define STACKBOTTOM ((ptr_t) 0x1fffd800)
 574 # endif
 575
 576 # ifdef SPARC
 577 #   define MACH_TYPE "SPARC"
 578 #   define ALIGNMENT 4  /* Required by hardware */
 579 #   define ALIGN_DOUBLE
 580     extern int etext;
 581 #   ifdef SUNOS5
 582 #       define OS_TYPE "SUNOS5"
 583         extern int _etext;
 584         extern int _end;
 585         extern char * GC_SysVGetDataStart();
 586 #       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
 587 #       define DATAEND (&_end)
 588 #       ifndef USE_MMAP
 589 #           define USE_MMAP
 590 #       endif
 591 #       ifdef USE_MMAP
 592 #         define HEAP_START (ptr_t)0x40000000
 593 #       else
 594 #         define HEAP_START DATAEND
 595 #       endif
 596 #       define PROC_VDB
 597 /*      HEURISTIC1 reportedly no longer works under 2.7.  Thus we       */
 598 /*      switched to HEURISTIC2, eventhough it creates some debugging    */
 599 /*      issues.                                                         */
 600 #       define HEURISTIC2
 601 #       include <unistd.h>
 602 #       define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
 603                 /* getpagesize() appeared to be missing from at least one */
 604                 /* Solaris 5.4 installation.  Weird.                      */
 605 #       define DYNAMIC_LOADING
 606 #   endif
 607 #   ifdef SUNOS4
 608 #       define OS_TYPE "SUNOS4"
 609         /* [If you have a weak stomach, don't read this.]               */
 610         /* We would like to use:                                        */
 611 /* #       define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */
 612         /* This fails occasionally, due to an ancient, but very         */
 613         /* persistent ld bug.  &etext is set 32 bytes too high.         */
 614         /* We instead read the text segment size from the a.out         */
 615         /* header, which happens to be mapped into our address space    */
 616         /* at the start of the text segment.  The detective work here   */
 617         /* was done by Robert Ehrlich, Manuel Serrano, and Bernard      */
 618         /* Serpette of INRIA.                                           */
 619         /* This assumes ZMAGIC, i.e. demand-loadable executables.       */
 620 #       define TEXTSTART 0x2000
 621 #       define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
 622 #       define MPROTECT_VDB
 623 #       define HEURISTIC1
 624 #       define DYNAMIC_LOADING
 625 #   endif
 626 #   ifdef DRSNX
 627 #       define CPP_WORDSZ 32
 628 #       define OS_TYPE "DRSNX"
 629         extern char * GC_SysVGetDataStart();
 630         extern int etext;
 631 #       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
 632 #       define MPROTECT_VDB
 633 #       define STACKBOTTOM ((ptr_t) 0xdfff0000)
 634 #       define DYNAMIC_LOADING
 635 #   endif
 636 #   ifdef LINUX
 637 #     define OS_TYPE "LINUX"
 638 #     ifdef __ELF__
 639 #         define DATASTART GC_data_start
 640 #         define DYNAMIC_LOADING
 641 #     else
 642           Linux Sparc non elf ?
 643 #     endif
 644       extern int _end;
 645 #     define DATAEND (&_end)
 646 #     define SVR4
 647 #     define STACKBOTTOM ((ptr_t) 0xf0000000)
 648 #   endif
 649 #   ifdef OPENBSD
 650 #     define OS_TYPE "OPENBSD"
 651 #     define STACKBOTTOM ((ptr_t) 0xf8000000)
 652 #     define DATASTART ((ptr_t)(&etext))
 653 #   endif
 654 # endif
 655
 656 # ifdef I386
 657 #   define MACH_TYPE "I386"
 658 #   define ALIGNMENT 4  /* Appears to hold for all "32 bit" compilers   */
 659                         /* except Borland.  The -a4 option fixes        */
 660                         /* Borland.                                     */
 661                         /* Ivan Demakov: For Watcom the option is -zp4. */
 662 #   ifndef SMALL_CONFIG
 663 #     define ALIGN_DOUBLE /* Not strictly necessary, but may give speed   */
 664                           /* improvement on Pentiums.                     */
 665 #   endif
 666 #   ifdef SEQUENT
 667 #       define OS_TYPE "SEQUENT"
 668         extern int etext;
 669 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
 670 #       define STACKBOTTOM ((ptr_t) 0x3ffff000)
 671 #   endif
 672 #   ifdef SUNOS5
 673 #       define OS_TYPE "SUNOS5"
 674         extern int etext, _start;
 675         extern char * GC_SysVGetDataStart();
 676 #       define DATASTART GC_SysVGetDataStart(0x1000, &etext)
 677 #       define STACKBOTTOM ((ptr_t)(&_start))
 678 /** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
 679 /*#     define PROC_VDB*/
 680 #       define DYNAMIC_LOADING
 681 #       ifndef USE_MMAP
 682 #           define USE_MMAP
 683 #       endif
 684 #       ifdef USE_MMAP
 685 #         define HEAP_START (ptr_t)0x40000000
 686 #       else
 687 #         define HEAP_START DATAEND
 688 #       endif
 689 #   endif
 690 #   ifdef SCO
 691 #       define OS_TYPE "SCO"
 692         extern int etext;
 693 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
 694                                   & ~0x3fffff) \
 695                                  +((word)&etext & 0xfff))
 696 #       define STACKBOTTOM ((ptr_t) 0x7ffffffc)
 697 #   endif
 698 #   ifdef SCO_ELF
 699 #       define OS_TYPE "SCO_ELF"
 700         extern int etext;
 701 #       define DATASTART ((ptr_t)(&etext))
 702 #       define STACKBOTTOM ((ptr_t) 0x08048000)
 703 #       define DYNAMIC_LOADING
 704 #       define ELF_CLASS ELFCLASS32
 705 #   endif
 706 #   ifdef LINUX
 707 #       define OS_TYPE "LINUX"
 708 #       define HEURISTIC1
 709 #       undef STACK_GRAN
 710 #       define STACK_GRAN 0x10000000
 711         /* STACKBOTTOM is usually 0xc0000000, but this changes with     */
 712         /* different kernel configurations.  In particular, systems     */
 713         /* with 2GB physical memory will usually move the user          */
 714         /* address space limit, and hence initial SP to 0x80000000.     */
 715 #       if !defined(LINUX_THREADS) || !defined(REDIRECT_MALLOC)
 716         /* libgcj: Linux threads don't interact well with the read() wrapper.
 717            Not defining MPROTECT_VDB fixes this.  */
 718 /* #        define MPROTECT_VDB */
 719 #       else
 720             /* We seem to get random errors in incremental mode,        */
 721             /* possibly because Linux threads is itself a malloc client */
 722             /* and can't deal with the signals.                         */
 723 #       endif
 724 #       ifdef __ELF__
 725 #            define DYNAMIC_LOADING
 726 #            ifdef UNDEFINED    /* includes ro data */
 727                extern int _etext;
 728 #              define DATASTART ((ptr_t)((((word) (&_etext)) + 0xfff) & ~0xfff))
 729 #            endif
 730 #            include <features.h>
 731 #            if defined(__GLIBC__) && __GLIBC__ >= 2
 732                  extern int __data_start;
 733 #                define DATASTART ((ptr_t)(&__data_start))
 734 #            else
 735                  extern char **__environ;
 736 #                define DATASTART ((ptr_t)(&__environ))
 737                               /* hideous kludge: __environ is the first */
 738                               /* word in crt0.o, and delimits the start */
 739                               /* of the data segment, no matter which   */
 740                               /* ld options were passed through.        */
 741                               /* We could use _etext instead, but that  */
 742                               /* would include .rodata, which may       */
 743                               /* contain large read-only data tables    */
 744                               /* that we'd rather not scan.             */
 745 #            endif
 746              extern int _end;
 747 #            define DATAEND (&_end)
 748 #       else
 749              extern int etext;
 750 #            define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
 751 #       endif
 752 #   endif
 753 #   ifdef CYGWIN32
 754 #       define OS_TYPE "CYGWIN32"
 755           extern int _data_start__;
 756           extern int _data_end__;
 757           extern int _bss_start__;
 758           extern int _bss_end__;
 759         /* For binutils 2.9.1, we have                  */
 760         /*      DATASTART   = _data_start__             */
 761         /*      DATAEND     = _bss_end__                */
 762         /* whereas for some earlier versions it was     */
 763         /*      DATASTART   = _bss_start__              */
 764         /*      DATAEND     = _data_end__               */
 765         /* To get it right for both, we take the        */
 766         /* minumum/maximum of the two.                  */
 767 #       define MAX(x,y) ((x) > (y) ? (x) : (y))
 768 #       define MIN(x,y) ((x) < (y) ? (x) : (y))
 769 #       define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__))
 770 #       define DATAEND   ((ptr_t) MAX(&_data_end__, &_bss_end__))
 771 #       undef STACK_GRAN
 772 #       define STACK_GRAN 0x10000
 773 #       define HEURISTIC1
 774 #   endif
 775 #   ifdef OS2
 776 #       define OS_TYPE "OS2"
 777                 /* STACKBOTTOM and DATASTART are handled specially in   */
 778                 /* os_dep.c. OS2 actually has the right                 */
 779                 /* system call!                                         */
 780 #       define DATAEND  /* not needed */
 781 #   endif
 782 #   ifdef MSWIN32
 783 #       define OS_TYPE "MSWIN32"
 784                 /* STACKBOTTOM and DATASTART are handled specially in   */
 785                 /* os_dep.c.                                            */
 786 #       ifndef __WATCOMC__
 787 #         define MPROTECT_VDB
 788 #       endif
 789 #       define DATAEND  /* not needed */
 790 #   endif
 791 #   ifdef DJGPP
 792 #       define OS_TYPE "DJGPP"
 793 #       include "stubinfo.h"
 794         extern int etext;
 795         extern int _stklen;
 796         extern int __djgpp_stack_limit;
 797 #       define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff))
 798 /* #       define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
 799                                                      + _stklen)) */
 800 #       define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
 801                 /* This may not be right.  */
 802 #   endif
 803 #   ifdef OPENBSD
 804 #       define OS_TYPE "OPENBSD"
 805 #   endif
 806 #   ifdef FREEBSD
 807 #       define OS_TYPE "FREEBSD"
 808 #       define MPROTECT_VDB
 809 #   endif
 810 #   ifdef NETBSD
 811 #       define OS_TYPE "NETBSD"
 812 #   endif
 813 #   ifdef THREE86BSD
 814 #       define OS_TYPE "THREE86BSD"
 815 #   endif
 816 #   ifdef BSDI
 817 #       define OS_TYPE "BSDI"
 818 #   endif
 819 #   if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) \
 820         || defined(THREE86BSD) || defined(BSDI)
 821 #       define HEURISTIC2
 822         extern char etext;
 823 #       define DATASTART ((ptr_t)(&etext))
 824 #   endif
 825 #   ifdef NEXT
 826 #       define OS_TYPE "NEXT"
 827 #       define DATASTART ((ptr_t) get_etext())
 828 #       define STACKBOTTOM ((ptr_t)0xc0000000)
 829 #       define DATAEND  /* not needed */
 830 #   endif
 831 #   ifdef DOS4GW
 832 #     define OS_TYPE "DOS4GW"
 833       extern long __nullarea;
 834       extern char _end;
 835       extern char *_STACKTOP;
 836       /* Depending on calling conventions Watcom C either precedes
 837          or does not precedes with undescore names of C-variables.
 838          Make sure startup code variables always have the same names.  */
 839       #pragma aux __nullarea "*";
 840       #pragma aux _end "*";
 841 #     define STACKBOTTOM ((ptr_t) _STACKTOP)
 842                          /* confused? me too. */
 843 #     define DATASTART ((ptr_t) &__nullarea)
 844 #     define DATAEND ((ptr_t) &_end)
 845 #   endif
 846 # endif
 847
 848 # ifdef NS32K
 849 #   define MACH_TYPE "NS32K"
 850 #   define ALIGNMENT 4
 851     extern char **environ;
 852 #   define DATASTART ((ptr_t)(&environ))
 853                               /* hideous kludge: environ is the first   */
 854                               /* word in crt0.o, and delimits the start */
 855                               /* of the data segment, no matter which   */
 856                               /* ld options were passed through.        */
 857 #   define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
 858 # endif
 859
 860 # ifdef MIPS
 861 # ifndef ECOS
 862 #   define MACH_TYPE "MIPS"
 863         /* LIBGCJ LOCAL: respect predefined DATASTART_IS_ETEXT.  */
 864 #   ifdef DATASTART_IS_ETEXT
 865         extern int _etext;
 866 #     define DATASTART ((ptr_t)(&_etext))
 867 #   else
 868 #     ifndef IRIX5
 869 #       define DATASTART (ptr_t)0x10000000
 870                               /* Could probably be slightly higher since */
 871                               /* startup code allocates lots of stuff.   */
 872 #     else
 873         extern int _fdata;
 874 #       define DATASTART ((ptr_t)(&_fdata))
 875 #       ifdef USE_MMAP
 876 #           define HEAP_START (ptr_t)0x30000000
 877 #       else
 878 #           define HEAP_START DATASTART
 879 #       endif
 880                               /* Lowest plausible heap address.         */
 881                               /* In the MMAP case, we map there.        */
 882                               /* In either case it is used to identify  */
 883                               /* heap sections so they're not           */
 884                               /* considered as roots.                   */
 885 #     endif /* IRIX5 */
 886 #   endif /* DATASTART_IS_ETEXT */
 887 #   define HEURISTIC2
 888 /* #   define STACKBOTTOM ((ptr_t)0x7fff8000)  sometimes also works.  */
 889 #   ifdef ULTRIX
 890 #       define OS_TYPE "ULTRIX"
 891 #       define ALIGNMENT 4
 892 #   endif
 893 #   ifdef RISCOS
 894 #       define OS_TYPE "RISCOS"
 895 #       define ALIGNMENT 4  /* Required by hardware */
 896 #   endif
 897 #   ifdef IRIX5
 898 #       define OS_TYPE "IRIX5"
 899 #       define MPROTECT_VDB
 900 #       ifdef _MIPS_SZPTR
 901 #         define CPP_WORDSZ _MIPS_SZPTR
 902 #         define ALIGNMENT (_MIPS_SZPTR/8)
 903 #         if CPP_WORDSZ != 64
 904 #           define ALIGN_DOUBLE
 905 #         endif
 906 #       else
 907 #         define ALIGNMENT 4
 908 #         define ALIGN_DOUBLE
 909 #       endif
 910 #       define DYNAMIC_LOADING
 911 #   endif
 912 #   endif /* ECOS */
 913 # ifdef ECOS
 914     extern char __ram_data_start;
 915     extern char __ram_data_end;
 916 #   define MACH_TYPE "MIPS"
 917 #   define DATASTART (ptr_t)(&__ram_data_start)
 918 #   define DATAEND (ptr_t)(&__ram_data_end)
 919
 920 #   define HEURISTIC2
 921 #   define ALIGNMENT 4
 922 #   define ALIGN_DOUBLE
 923 #   endif /* ECOS */
 924 # endif
 925
 926 # ifdef RS6000
 927 #   define MACH_TYPE "RS6000"
 928 #   define ALIGNMENT 4
 929 #   define DATASTART ((ptr_t)0x20000000)
 930     extern int errno;
 931 #   define STACKBOTTOM ((ptr_t)((ulong)&errno))
 932 #   define DYNAMIC_LOADING
 933         /* For really old versions of AIX, this may have to be removed. */
 934 # endif
 935
 936 # ifdef HP_PA
 937     /* OS is assumed to be HP/UX        */
 938 #   define MACH_TYPE "HP_PA"
 939 #   define OS_TYPE "HPUX"
 940 #   ifdef __LP64__
 941 #     define CPP_WORDSZ 64
 942 #     define ALIGNMENT 8
 943 #   else
 944 #     define CPP_WORDSZ 32
 945 #     define ALIGNMENT 4
 946 #     define ALIGN_DOUBLE
 947 #   endif
 948     extern int __data_start;
 949 #   define DATASTART ((ptr_t)(&__data_start))
 950 #   if 0
 951         /* The following appears to work for 7xx systems running HP/UX  */
 952         /* 9.xx Furthermore, it might result in much faster             */
 953         /* collections than HEURISTIC2, which may involve scanning      */
 954         /* segments that directly precede the stack.  It is not the     */
 955         /* default, since it may not work on older machine/OS           */
 956         /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
 957         /* this.)                                                       */
 958 #       define STACKBOTTOM ((ptr_t) 0x7b033000)  /* from /etc/conf/h/param.h */
 959 #   else
 960 #       define HEURISTIC2
 961 #   endif
 962 #   define STACK_GROWS_UP
 963 #   define DYNAMIC_LOADING
 964 #   ifndef HPUX_THREADS
 965 #     define MPROTECT_VDB
 966 #   endif
 967 #   include <unistd.h>
 968 #   define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
 969         /* They misspelled the Posix macro?     */
 970 # endif
 971
 972 # ifdef ALPHA
 973 #   define MACH_TYPE "ALPHA"
 974 #   define ALIGNMENT 8
 975 #   ifdef OSF1
 976 #       define OS_TYPE "OSF1"
 977 #       define DATASTART ((ptr_t) 0x140000000)
 978         extern _end;
 979 #       define DATAEND ((ptr_t) &_end)
 980 #       define HEURISTIC2
 981         /* Normally HEURISTIC2 is too conervative, since                */
 982         /* the text segment immediately follows the stack.              */
 983         /* Hence we give an upper pound.                                */
 984         extern int __start;
 985 #       define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1)))
 986 #       define CPP_WORDSZ 64
 987 #       define MPROTECT_VDB
 988 #       define DYNAMIC_LOADING
 989 #   endif
 990 #   ifdef LINUX
 991 #       define OS_TYPE "LINUX"
 992 #       define CPP_WORDSZ 64
 993 #       define STACKBOTTOM ((ptr_t) 0x120000000)
 994 #       ifdef __ELF__
 995 #         if 0
 996             /* __data_start apparently disappeared in some recent releases. */
 997             extern int __data_start;
 998 #           define DATASTART &__data_start
 999 #         endif
1000 #         define DATASTART GC_data_start
1001 #         define DYNAMIC_LOADING
1002 #       else
1003 #           define DATASTART ((ptr_t) 0x140000000)
1004 #       endif
1005         extern int _end;
1006 #       define DATAEND (&_end)
1007 #       define MPROTECT_VDB
1008                 /* Has only been superficially tested.  May not */
1009                 /* work on all versions.                        */
1010 #   endif
1011 # endif
1012
1013 # ifdef IA64
1014 #   define MACH_TYPE "IA64"
1015 #   define ALIGN_DOUBLE
1016         /* Requires 16 byte alignment for malloc */
1017 #   define ALIGNMENT 8
1018 #   ifdef HPUX
1019         --> needs work
1020 #   endif
1021 #   ifdef LINUX
1022 #       define OS_TYPE "LINUX"
1023 #       define CPP_WORDSZ 64
1024         /* This should really be done through /proc, but that   */
1025         /* requires we run on an IA64 kernel.                   */
1026 #       define STACKBOTTOM ((ptr_t) 0xa000000000000000l)
1027         /* We also need the base address of the register stack  */
1028         /* backing store.  There is probably a better way to    */
1029         /* get that, too ...                                    */
1030 #       define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l)
1031 #       define DATASTART GC_data_start
1032 #       define DYNAMIC_LOADING
1033         extern int _end;
1034 #       define DATAEND (&_end)
1035 #   endif
1036 # endif
1037
1038 # ifdef M88K
1039 #   define MACH_TYPE "M88K"
1040 #   define ALIGNMENT 4
1041 #   define ALIGN_DOUBLE
1042     extern int etext;
1043 #   ifdef CX_UX
1044 #       define OS_TYPE "CX_UX"
1045 #       define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000)
1046 #   endif
1047 #   ifdef  DGUX
1048 #       define OS_TYPE "DGUX"
1049         extern char * GC_SysVGetDataStart();
1050 #       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
1051 #   endif
1052 #   define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
1053 # endif
1054
1055 # ifdef S370
1056 #   define MACH_TYPE "S370"
1057 #   define OS_TYPE "UTS4"
1058 #   define ALIGNMENT 4  /* Required by hardware */
1059     extern int etext;
1060         extern int _etext;
1061         extern int _end;
1062         extern char * GC_SysVGetDataStart();
1063 #       define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
1064 #       define DATAEND (&_end)
1065 #       define HEURISTIC2
1066 # endif
1067
1068 # if defined(PJ)
1069 #   define ALIGNMENT 4
1070     extern int _etext;
1071 #   define DATASTART ((ptr_t)(&_etext))
1072 #   define HEURISTIC1
1073 # endif
1074
1075 # ifdef ARM32
1076 #   define CPP_WORDSZ 32
1077 #   define MACH_TYPE "ARM32"
1078 #   define ALIGNMENT 4
1079 #   ifdef NETBSD
1080 #       define OS_TYPE "NETBSD"
1081 #       define HEURISTIC2
1082         extern char etext;
1083 #       define DATASTART ((ptr_t)(&etext))
1084 #       define USE_GENERIC_PUSH_REGS
1085 #   endif
1086 #endif
1087
1088 # ifndef STACK_GROWS_UP
1089 #   define STACK_GROWS_DOWN
1090 # endif
1091
1092 # ifndef CPP_WORDSZ
1093 #   define CPP_WORDSZ 32
1094 # endif
1095
1096 # ifndef OS_TYPE
1097 #   define OS_TYPE ""
1098 # endif
1099
1100 # ifndef DATAEND
1101     extern int end;
1102 #   define DATAEND (&end)
1103 # endif
1104
1105 # if defined(SVR4) && !defined(GETPAGESIZE)
1106 #    include <unistd.h>
1107 #    define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
1108 # endif
1109
1110 # ifndef GETPAGESIZE
1111 #   if defined(SUNOS5) || defined(IRIX5)
1112 #       include <unistd.h>
1113 #   endif
1114 #   define GETPAGESIZE() getpagesize()
1115 # endif
1116
1117 # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
1118     /* OS has SVR4 generic features.  Probably others also qualify.     */
1119 #   define SVR4
1120 # endif
1121
1122 # if defined(SUNOS5) || defined(DRSNX)
1123     /* OS has SUNOS5 style semi-undocumented interface to dynamic       */
1124     /* loader.                                                          */
1125 #   define SUNOS5DL
1126     /* OS has SUNOS5 style signal handlers.                             */
1127 #   define SUNOS5SIGS
1128 # endif
1129
1130 # if defined(HPUX)
1131 #   define SUNOS5SIGS
1132 # endif
1133
1134 # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
1135    -> bad word size
1136 # endif
1137
1138 # ifdef PCR
1139 #   undef DYNAMIC_LOADING
1140 #   undef STACKBOTTOM
1141 #   undef HEURISTIC1
1142 #   undef HEURISTIC2
1143 #   undef PROC_VDB
1144 #   undef MPROTECT_VDB
1145 #   define PCR_VDB
1146 # endif
1147
1148 # ifdef SRC_M3
1149 /* Postponed for now. */
1150 #   undef PROC_VDB
1151 #   undef MPROTECT_VDB
1152 # endif
1153
1154 # ifdef SMALL_CONFIG
1155 /* Presumably not worth the space it takes. */
1156 #   undef PROC_VDB
1157 #   undef MPROTECT_VDB
1158 # endif
1159
1160 # ifdef USE_MUNMAP
1161 #   undef MPROTECT_VDB  /* Can't deal with address space holes. */
1162 # endif
1163
1164 # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
1165 #   define DEFAULT_VDB
1166 # endif
1167
1168 # if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
1169 #   define SOLARIS_THREADS
1170 # endif
1171 # if defined(IRIX_THREADS) && !defined(IRIX5)
1172 --> inconsistent configuration
1173 # endif
1174 # if defined(IRIX_JDK_THREADS) && !defined(IRIX5)
1175 --> inconsistent configuration
1176 # endif
1177 # if defined(LINUX_THREADS) && !defined(LINUX)
1178 --> inconsistent configuration
1179 # endif
1180 # if defined(SOLARIS_THREADS) && !defined(SUNOS5)
1181 --> inconsistent configuration
1182 # endif
1183 # if defined(HPUX_THREADS) && !defined(HPUX)
1184 --> inconsistent configuration
1185 # endif
1186 # if defined(PCR) || defined(SRC_M3) || \
1187         defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
1188         defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
1189         defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
1190 #   define THREADS
1191 # endif
1192
1193 # if defined(HP_PA) || defined(M88K) || defined(POWERPC) \
1194      || (defined(I386) && defined(OS2)) || defined(UTS4) || defined(LINT)
1195         /* Use setjmp based hack to mark from callee-save registers. */
1196 #       define USE_GENERIC_PUSH_REGS
1197 # endif
1198 # if defined(SPARC) && !defined(LINUX)
1199 #   define SAVE_CALL_CHAIN
1200 #   define ASM_CLEAR_CODE       /* Stack clearing is crucial, and we    */
1201                                 /* include assembly code to do it well. */
1202 # endif
1203
1204 # endif