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Make std::vector<bool> meet C++11 allocator requirements.
[official-gcc.git] / boehm-gc / include / private / gcconfig.h
blob7e081d993bb09b7ecb201bf9a1c8ec95a8bde47c
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 * Copyright (c) 2000-2004 Hewlett-Packard Development Company, L.P.
6 *
7 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
8 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
9 *
10 * Permission is hereby granted to use or copy this program
11 * for any purpose, provided the above notices are retained on all copies.
12 * Permission to modify the code and to distribute modified code is granted,
13 * provided the above notices are retained, and a notice that the code was
14 * modified is included with the above copyright notice.
15 */
16
17 /*
18 * This header is private to the gc. It is almost always included from
19 * gc_priv.h. However it is possible to include it by itself if just the
20 * configuration macros are needed. In that
21 * case, a few declarations relying on types declared in gc_priv.h will be
22 * omitted.
23 */
24
25 #ifndef GCCONFIG_H
26
27 # define GCCONFIG_H
28
29 # ifndef GC_PRIVATE_H
30 /* Fake ptr_t declaration, just to avoid compilation errors. */
31 /* This avoids many instances if "ifndef GC_PRIVATE_H" below. */
32 typedef struct GC_undefined_struct * ptr_t;
33 # endif
34
35 /* Machine dependent parameters. Some tuning parameters can be found */
36 /* near the top of gc_private.h. */
37
38 /* Machine specific parts contributed by various people. See README file. */
39
40 /* First a unified test for Linux: */
41 # if defined(linux) || defined(__linux__)
42 # ifndef LINUX
43 # define LINUX
44 # endif
45 # endif
46
47 /* And one for NetBSD: */
48 # if defined(__NetBSD__)
49 # define NETBSD
50 # endif
51
52 /* And one for OpenBSD: */
53 # if defined(__OpenBSD__)
54 # define OPENBSD
55 # endif
56
57 /* And one for FreeBSD: */
58 # if ( defined(__FreeBSD__) || defined(__FreeBSD_kernel__) ) && !defined(FREEBSD)
59 # define FREEBSD
60 # endif
61
62 /* Determine the machine type: */
63 #if defined(__aarch64__)
64 # define AARCH64
65 # if !defined(LINUX)
66 # define NOSYS
67 # define mach_type_known
68 # endif
69 # endif
70 # if defined(__arm__) || defined(__thumb__)
71 # define ARM32
72 # if !defined(LINUX) && !defined(NETBSD)
73 # define NOSYS
74 # define mach_type_known
75 # endif
76 # endif
77 # if defined(sun) && defined(mc68000)
78 # define M68K
79 # define SUNOS4
80 # define mach_type_known
81 # endif
82 # if defined(hp9000s300)
83 # define M68K
84 # define HP
85 # define mach_type_known
86 # endif
87 # if defined(OPENBSD) && defined(m68k)
88 # define M68K
89 # define mach_type_known
90 # endif
91 # if defined(OPENBSD) && defined(__sparc__)
92 # define SPARC
93 # define mach_type_known
94 # endif
95 # if defined(NETBSD) && (defined(m68k) || defined(__m68k__))
96 # define M68K
97 # define mach_type_known
98 # endif
99 # if defined(NETBSD) && defined(__powerpc__)
100 # define POWERPC
101 # define mach_type_known
102 # endif
103 # if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))
104 # define ARM32
105 # define mach_type_known
106 # endif
107 # if defined(NETBSD) && defined(__sh__)
108 # define SH
109 # define mach_type_known
110 # endif
111 # if defined(vax)
112 # define VAX
113 # ifdef ultrix
114 # define ULTRIX
115 # else
116 # define BSD
117 # endif
118 # define mach_type_known
119 # endif
120 # if defined(__NetBSD__) && defined(__vax__)
121 # define VAX
122 # define mach_type_known
123 # endif
124 # if defined(mips) || defined(__mips) || defined(_mips)
125 # define MIPS
126 # if defined(nec_ews) || defined(_nec_ews)
127 # define EWS4800
128 # endif
129 # if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD)
130 # if defined(ultrix) || defined(__ultrix)
131 # define ULTRIX
132 # else
133 # if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
134 || defined(__SYSTYPE_SVR4__)
135 # define IRIX5 /* or IRIX 6.X */
136 # else
137 # define RISCOS /* or IRIX 4.X */
138 # endif
139 # endif
140 # endif /* !LINUX */
141 # if defined(__NetBSD__) && defined(__MIPSEL__)
142 # undef ULTRIX
143 # endif
144 # define mach_type_known
145 # endif
146 # if defined(DGUX) && (defined(i386) || defined(__i386__))
147 # define I386
148 # ifndef _USING_DGUX
149 # define _USING_DGUX
150 # endif
151 # define mach_type_known
152 # endif
153 # if defined(sequent) && (defined(i386) || defined(__i386__))
154 # define I386
155 # define SEQUENT
156 # define mach_type_known
157 # endif
158 # if defined(sun) && (defined(i386) || defined(__i386__))
159 # define I386
160 # define SUNOS5
161 # define mach_type_known
162 # endif
163 # if defined(sun) && defined(__amd64)
164 # define X86_64
165 # define SUNOS5
166 # define mach_type_known
167 # endif
168 # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
169 # define I386
170 # define OS2
171 # define mach_type_known
172 # endif
173 # if defined(ibm032)
174 # define RT
175 # define mach_type_known
176 # endif
177 # if defined(sun) && (defined(sparc) || defined(__sparc))
178 # define SPARC
179 /* Test for SunOS 5.x */
180 # include <errno.h>
181 # ifdef ECHRNG
182 # define SUNOS5
183 # else
184 # define SUNOS4
185 # endif
186 # define mach_type_known
187 # endif
188 # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
189 && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
190 # define SPARC
191 # define DRSNX
192 # define mach_type_known
193 # endif
194 # if defined(_IBMR2)
195 # define RS6000
196 # define mach_type_known
197 # endif
198 # if defined(__NetBSD__) && defined(__sparc__)
199 # define SPARC
200 # define mach_type_known
201 # endif
202 # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
203 /* The above test may need refinement */
204 # define I386
205 # if defined(_SCO_ELF)
206 # define SCO_ELF
207 # else
208 # define SCO
209 # endif
210 # define mach_type_known
211 # endif
212 # if defined(_AUX_SOURCE)
213 # define M68K
214 # define SYSV
215 # define mach_type_known
216 # endif
217 # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
218 || defined(hppa) || defined(__hppa__)
219 # define HP_PA
220 # if !defined(LINUX) && !defined(HPUX)
221 # define HPUX
222 # endif
223 # define mach_type_known
224 # endif
225 # if defined(__ia64) && defined(_HPUX_SOURCE)
226 # define IA64
227 # ifndef HPUX
228 # define HPUX
229 # endif
230 # define mach_type_known
231 # endif
232 # if defined(__BEOS__) && defined(_X86_)
233 # define I386
234 # define BEOS
235 # define mach_type_known
236 # endif
237 # if defined(LINUX) && (defined(i386) || defined(__i386__))
238 # define I386
239 # define mach_type_known
240 # endif
241 # if defined(LINUX) && defined(__x86_64__)
242 # define X86_64
243 # define mach_type_known
244 # endif
245 # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
246 # define IA64
247 # define mach_type_known
248 # endif
249 # if defined(LINUX) && defined(__aarch64__)
250 # define AARCH64
251 # define mach_type_known
252 # endif
253 # if defined(LINUX) && defined(__arm__)
254 # define ARM32
255 # define mach_type_known
256 # endif
257 # if defined(LINUX) && defined(__cris__)
258 # ifndef CRIS
259 # define CRIS
260 # endif
261 # define mach_type_known
262 # endif
263 # if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) || \
264 defined(powerpc64) || defined(__powerpc64__))
265 # define POWERPC
266 # define mach_type_known
267 # endif
268 # if defined(FREEBSD) && (defined(powerpc) || defined(__powerpc__))
269 # define POWERPC
270 # define mach_type_known
271 # endif
272 # if defined(LINUX) && defined(__mc68000__)
273 # define M68K
274 # define mach_type_known
275 # endif
276 # if defined(LINUX) && (defined(sparc) || defined(__sparc__))
277 # define SPARC
278 # define mach_type_known
279 # endif
280 # if defined(LINUX) && defined(__arm__)
281 # define ARM32
282 # define mach_type_known
283 # endif
284 # if defined(LINUX) && defined(__sh__)
285 # define SH
286 # define mach_type_known
287 # endif
288 # if defined(LINUX) && defined(__m32r__)
289 # define M32R
290 # define mach_type_known
291 # endif
292 # if defined(__alpha) || defined(__alpha__)
293 # define ALPHA
294 # if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)
295 # define OSF1 /* a.k.a Digital Unix */
296 # endif
297 # define mach_type_known
298 # endif
299 # if defined(_AMIGA) && !defined(AMIGA)
300 # define AMIGA
301 # endif
302 # ifdef AMIGA
303 # define M68K
304 # define mach_type_known
305 # endif
306 # if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
307 # define M68K
308 # define MACOS
309 # define mach_type_known
310 # endif
311 # if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)
312 # define POWERPC
313 # define MACOS
314 # define mach_type_known
315 # endif
316 # if defined(macosx) || (defined(__APPLE__) && defined(__MACH__))
317 # define DARWIN
318 # if defined(__ppc__) || defined(__ppc64__)
319 # define POWERPC
320 # define mach_type_known
321 # elif defined(__x86_64__)
322 # define X86_64
323 # define mach_type_known
324 # elif defined(__i386__)
325 # define I386
326 # define mach_type_known
327 # endif
328 # endif
329 # if defined(NeXT) && defined(mc68000)
330 # define M68K
331 # define NEXT
332 # define mach_type_known
333 # endif
334 # if defined(NeXT) && (defined(i386) || defined(__i386__))
335 # define I386
336 # define NEXT
337 # define mach_type_known
338 # endif
339 # if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))
340 # define I386
341 # define OPENBSD
342 # define mach_type_known
343 # endif
344 # if defined(FREEBSD) && (defined(i386) || defined(__i386__))
345 # define I386
346 # define mach_type_known
347 # endif
348 # if defined(FREEBSD) && defined(__x86_64__)
349 # define X86_64
350 # define mach_type_known
351 # endif
352 # if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
353 # define I386
354 # define mach_type_known
355 # endif
356 # if defined(__NetBSD__) && defined(__x86_64__)
357 # define X86_64
358 # define mach_type_known
359 # endif
360 # if defined(FREEBSD) && defined(__sparc__)
361 # define SPARC
362 # define mach_type_known
363 #endif
364 # if defined(bsdi) && (defined(i386) || defined(__i386__))
365 # define I386
366 # define BSDI
367 # define mach_type_known
368 # endif
369 # if !defined(mach_type_known) && defined(__386BSD__)
370 # define I386
371 # define THREE86BSD
372 # define mach_type_known
373 # endif
374 # if defined(_CX_UX) && defined(_M88K)
375 # define M88K
376 # define CX_UX
377 # define mach_type_known
378 # endif
379 # if defined(DGUX) && defined(m88k)
380 # define M88K
381 /* DGUX defined */
382 # define mach_type_known
383 # endif
384 # if defined(_WIN32_WCE)
385 /* SH3, SH4, MIPS already defined for corresponding architectures */
386 # if defined(SH3) || defined(SH4)
387 # define SH
388 # endif
389 # if defined(x86)
390 # define I386
391 # endif
392 # if defined(ARM)
393 # define ARM32
394 # endif
395 # define MSWINCE
396 # define mach_type_known
397 # else
398 # if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
399 || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
400 # define I386
401 # define MSWIN32 /* or Win32s */
402 # define mach_type_known
403 # endif
404 # if defined(_MSC_VER) && defined(_M_IA64)
405 # define IA64
406 # define MSWIN32 /* Really win64, but we don't treat 64-bit */
407 /* variants as a differnt platform. */
408 # endif
409 # endif
410 # if defined(__DJGPP__)
411 # define I386
412 # ifndef DJGPP
413 # define DJGPP /* MSDOS running the DJGPP port of GCC */
414 # endif
415 # define mach_type_known
416 # endif
417 # if defined(__CYGWIN32__) || defined(__CYGWIN__)
418 # define I386
419 # define CYGWIN32
420 # define mach_type_known
421 # endif
422 # if defined(__MINGW32__)
423 # define I386
424 # define MSWIN32
425 # define mach_type_known
426 # endif
427 # if defined(__BORLANDC__)
428 # define I386
429 # define MSWIN32
430 # define mach_type_known
431 # endif
432 # if defined(_UTS) && !defined(mach_type_known)
433 # define S370
434 # define UTS4
435 # define mach_type_known
436 # endif
437 # if defined(__pj__)
438 # define PJ
439 # define mach_type_known
440 # endif
441 # if defined(__embedded__) && defined(PPC)
442 # define POWERPC
443 # define NOSYS
444 # define mach_type_known
445 # endif
446 /* Ivan Demakov */
447 # if defined(__WATCOMC__) && defined(__386__)
448 # define I386
449 # if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
450 # if defined(__OS2__)
451 # define OS2
452 # else
453 # if defined(__WINDOWS_386__) || defined(__NT__)
454 # define MSWIN32
455 # else
456 # define DOS4GW
457 # endif
458 # endif
459 # endif
460 # define mach_type_known
461 # endif
462 # if defined(__s390__) && defined(LINUX)
463 # define S390
464 # define mach_type_known
465 # endif
466 # if defined(__GNU__)
467 # if defined(__i386__)
468 /* The Debian Hurd running on generic PC */
469 # define HURD
470 # define I386
471 # define mach_type_known
472 # endif
473 # endif
474
475 /* Feel free to add more clauses here */
476
477 /* Or manually define the machine type here. A machine type is */
478 /* characterized by the architecture. Some */
479 /* machine types are further subdivided by OS. */
480 /* the macros ULTRIX, RISCOS, and BSD to distinguish. */
481 /* Note that SGI IRIX is treated identically to RISCOS. */
482 /* SYSV on an M68K actually means A/UX. */
483 /* The distinction in these cases is usually the stack starting address */
484 # ifndef mach_type_known
485 --> unknown machine type
486 # endif
487 /* Mapping is: M68K ==> Motorola 680X0 */
488 /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
489 /* MACOS and AMIGA variants) */
490 /* I386 ==> Intel 386 */
491 /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
492 /* FREEBSD, THREE86BSD, MSWIN32, */
493 /* BSDI,SUNOS5, NEXT, other variants) */
494 /* NS32K ==> Encore Multimax */
495 /* MIPS ==> R2000 or R3000 */
496 /* (RISCOS, ULTRIX variants) */
497 /* VAX ==> DEC VAX */
498 /* (BSD, ULTRIX variants) */
499 /* RS6000 ==> IBM RS/6000 AIX3.X */
500 /* RT ==> IBM PC/RT */
501 /* HP_PA ==> HP9000/700 & /800 */
502 /* HP/UX, LINUX */
503 /* SPARC ==> SPARC v7/v8/v9 */
504 /* (SUNOS4, SUNOS5, LINUX, */
505 /* DRSNX variants) */
506 /* ALPHA ==> DEC Alpha */
507 /* (OSF1 and LINUX variants) */
508 /* M88K ==> Motorola 88XX0 */
509 /* (CX_UX and DGUX) */
510 /* S370 ==> 370-like machine */
511 /* running Amdahl UTS4 */
512 /* S390 ==> 390-like machine */
513 /* running LINUX */
514 /* AARCH64 ==> ARM AArch64 */
515 /* ARM32 ==> Intel StrongARM */
516 /* IA64 ==> Intel IPF */
517 /* (e.g. Itanium) */
518 /* (LINUX and HPUX) */
519 /* SH ==> Hitachi SuperH */
520 /* (LINUX & MSWINCE) */
521 /* X86_64 ==> AMD x86-64 */
522 /* POWERPC ==> IBM/Apple PowerPC */
523 /* (MACOS(<=9),DARWIN(incl.MACOSX),*/
524 /* LINUX, NETBSD, NOSYS variants) */
525 /* Handles 32 and 64-bit variants. */
526 /* AIX should be handled here, but */
527 /* that's called an RS6000. */
528 /* CRIS ==> Axis Etrax */
529 /* M32R ==> Renesas M32R */
530
531
532 /*
533 * For each architecture and OS, the following need to be defined:
534 *
535 * CPP_WORDSZ is a simple integer constant representing the word size.
536 * in bits. We assume byte addressibility, where a byte has 8 bits.
537 * We also assume CPP_WORDSZ is either 32 or 64.
538 * (We care about the length of pointers, not hardware
539 * bus widths. Thus a 64 bit processor with a C compiler that uses
540 * 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)
541 *
542 * MACH_TYPE is a string representation of the machine type.
543 * OS_TYPE is analogous for the OS.
544 *
545 * ALIGNMENT is the largest N, such that
546 * all pointer are guaranteed to be aligned on N byte boundaries.
547 * defining it to be 1 will always work, but perform poorly.
548 *
549 * DATASTART is the beginning of the data segment.
550 * On some platforms SEARCH_FOR_DATA_START is defined.
551 * SEARCH_FOR_DATASTART will cause GC_data_start to
552 * be set to an address determined by accessing data backwards from _end
553 * until an unmapped page is found. DATASTART will be defined to be
554 * GC_data_start.
555 * On UNIX-like systems, the collector will scan the area between DATASTART
556 * and DATAEND for root pointers.
557 *
558 * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.
559 * RTH suggests gaining access to linker script synth'd values with
560 * this idiom instead of `&end' where `end' is defined as ``extern int end;'' .
561 * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g.,
562 * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-*
563 * without any special options.
564 *
565 * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
566 * the pointer size.
567 *
568 * STACKBOTTOM is the cool end of the stack, which is usually the
569 * highest address in the stack.
570 * Under PCR or OS/2, we have other ways of finding thread stacks.
571 * For each machine, the following should:
572 * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
573 * 2) define exactly one of
574 * STACKBOTTOM (should be defined to be an expression)
575 * LINUX_STACKBOTTOM
576 * HEURISTIC1
577 * HEURISTIC2
578 * If STACKBOTTOM is defined, then it's value will be used directly as the
579 * stack base. If LINUX_STACKBOTTOM is defined, then it will be determined
580 * with a method appropriate for most Linux systems. Currently we look
581 * first for __libc_stack_end, and if that fails read it from /proc.
582 * If either of the last two macros are defined, then STACKBOTTOM is computed
583 * during collector startup using one of the following two heuristics:
584 * HEURISTIC1: Take an address inside GC_init's frame, and round it up to
585 * the next multiple of STACK_GRAN.
586 * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
587 * in small steps (decrement if STACK_GROWS_UP), and read the value
588 * at each location. Remember the value when the first
589 * Segmentation violation or Bus error is signalled. Round that
590 * to the nearest plausible page boundary, and use that instead
591 * of STACKBOTTOM.
592 *
593 * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
594 * the value of environ is a pointer that can serve as STACKBOTTOM.
595 * I expect that HEURISTIC2 can be replaced by this approach, which
596 * interferes far less with debugging. However it has the disadvantage
597 * that it's confused by a putenv call before the collector is initialized.
598 * This could be dealt with by intercepting putenv ...
599 *
600 * If no expression for STACKBOTTOM can be found, and neither of the above
601 * heuristics are usable, the collector can still be used with all of the above
602 * undefined, provided one of the following is done:
603 * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
604 * without reference to STACKBOTTOM. This is appropriate for use in
605 * conjunction with thread packages, since there will be multiple stacks.
606 * (Allocating thread stacks in the heap, and treating them as ordinary
607 * heap data objects is also possible as a last resort. However, this is
608 * likely to introduce significant amounts of excess storage retention
609 * unless the dead parts of the thread stacks are periodically cleared.)
610 * 2) Client code may set GC_stackbottom before calling any GC_ routines.
611 * If the author of the client code controls the main program, this is
612 * easily accomplished by introducing a new main program, setting
613 * GC_stackbottom to the address of a local variable, and then calling
614 * the original main program. The new main program would read something
615 * like:
616 *
617 * # include "gc_private.h"
618 *
619 * main(argc, argv, envp)
620 * int argc;
621 * char **argv, **envp;
622 * {
623 * int dummy;
624 *
625 * GC_stackbottom = (ptr_t)(&dummy);
626 * return(real_main(argc, argv, envp));
627 * }
628 *
629 *
630 * Each architecture may also define the style of virtual dirty bit
631 * implementation to be used:
632 * MPROTECT_VDB: Write protect the heap and catch faults.
633 * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
634 *
635 * An architecture may define DYNAMIC_LOADING if dynamic_load.c
636 * defined GC_register_dynamic_libraries() for the architecture.
637 *
638 * An architecture may define PREFETCH(x) to preload the cache with *x.
639 * This defaults to a no-op.
640 *
641 * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
642 *
643 * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
644 * clear the two words at GC_malloc-aligned address x. By default,
645 * word stores of 0 are used instead.
646 *
647 * HEAP_START may be defined as the initial address hint for mmap-based
648 * allocation.
649 */
650
651 /* If we are using a recent version of gcc, we can use __builtin_unwind_init()
652 * to push the relevant registers onto the stack. This generally makes
653 * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers.
654 */
655 # if defined(__GNUC__) && ((__GNUC__ >= 3) || \
656 (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) \
657 && !defined(__INTEL_COMPILER) \
658 && !defined(__PATHCC__)
659 # define HAVE_BUILTIN_UNWIND_INIT
660 # endif
661
662 # define STACK_GRAN 0x1000000
663 # ifdef M68K
664 # define MACH_TYPE "M68K"
665 # define ALIGNMENT 2
666 # ifdef OPENBSD
667 # define OS_TYPE "OPENBSD"
668 # define HEURISTIC2
669 # ifdef __ELF__
670 # define DATASTART GC_data_start
671 # define DYNAMIC_LOADING
672 # else
673 extern char etext[];
674 # define DATASTART ((ptr_t)(etext))
675 # endif
676 # define USE_GENERIC_PUSH_REGS
677 # endif
678 # ifdef NETBSD
679 # define OS_TYPE "NETBSD"
680 # define HEURISTIC2
681 # ifdef __ELF__
682 # define DATASTART GC_data_start
683 # define DYNAMIC_LOADING
684 # else
685 extern char etext[];
686 # define DATASTART ((ptr_t)(etext))
687 # endif
688 # define USE_GENERIC_PUSH_REGS
689 # endif
690 # ifdef LINUX
691 # define OS_TYPE "LINUX"
692 # define LINUX_STACKBOTTOM
693 # define USE_GENERIC_PUSH_REGS
694 /* We never got around to the assembly version. */
695 # define MPROTECT_VDB
696 # ifdef __ELF__
697 # define DYNAMIC_LOADING
698 # include <features.h>
699 # if defined(__GLIBC__)&& __GLIBC__>=2
700 # define SEARCH_FOR_DATA_START
701 # else /* !GLIBC2 */
702 extern char **__environ;
703 # define DATASTART ((ptr_t)(&__environ))
704 /* hideous kludge: __environ is the first */
705 /* word in crt0.o, and delimits the start */
706 /* of the data segment, no matter which */
707 /* ld options were passed through. */
708 /* We could use _etext instead, but that */
709 /* would include .rodata, which may */
710 /* contain large read-only data tables */
711 /* that we'd rather not scan. */
712 # endif /* !GLIBC2 */
713 extern int _end[];
714 # define DATAEND (_end)
715 # else
716 extern int etext[];
717 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
718 # endif
719 # endif
720 # ifdef SUNOS4
721 # define OS_TYPE "SUNOS4"
722 extern char etext[];
723 # define DATASTART ((ptr_t)((((word) (etext)) + 0x1ffff) & ~0x1ffff))
724 # define HEURISTIC1 /* differs */
725 # define DYNAMIC_LOADING
726 # endif
727 # ifdef HP
728 # define OS_TYPE "HP"
729 extern char etext[];
730 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
731 # define STACKBOTTOM ((ptr_t) 0xffeffffc)
732 /* empirically determined. seems to work. */
733 # include <unistd.h>
734 # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
735 # endif
736 # ifdef SYSV
737 # define OS_TYPE "SYSV"
738 extern etext[];
739 # define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
740 & ~0x3fffff) \
741 +((word)etext & 0x1fff))
742 /* This only works for shared-text binaries with magic number 0413.
743 The other sorts of SysV binaries put the data at the end of the text,
744 in which case the default of etext would work. Unfortunately,
745 handling both would require having the magic-number available.
746 -- Parag
747 */
748 # define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
749 /* The stack starts at the top of memory, but */
750 /* 0x0 cannot be used as setjump_test complains */
751 /* that the stack direction is incorrect. Two */
752 /* bytes down from 0x0 should be safe enough. */
753 /* --Parag */
754 # include <sys/mmu.h>
755 # define GETPAGESIZE() PAGESIZE /* Is this still right? */
756 # endif
757 # ifdef AMIGA
758 # define OS_TYPE "AMIGA"
759 /* STACKBOTTOM and DATASTART handled specially */
760 /* in os_dep.c */
761 # define DATAEND /* not needed */
762 # define GETPAGESIZE() 4096
763 # endif
764 # ifdef MACOS
765 # ifndef __LOWMEM__
766 # include <LowMem.h>
767 # endif
768 # define OS_TYPE "MACOS"
769 /* see os_dep.c for details of global data segments. */
770 # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
771 # define DATAEND /* not needed */
772 # define GETPAGESIZE() 4096
773 # endif
774 # ifdef NEXT
775 # define OS_TYPE "NEXT"
776 # define DATASTART ((ptr_t) get_etext())
777 # define STACKBOTTOM ((ptr_t) 0x4000000)
778 # define DATAEND /* not needed */
779 # endif
780 # endif
781
782 # if defined(POWERPC)
783 # define MACH_TYPE "POWERPC"
784 # ifdef MACOS
785 # define ALIGNMENT 2 /* Still necessary? Could it be 4? */
786 # ifndef __LOWMEM__
787 # include <LowMem.h>
788 # endif
789 # define OS_TYPE "MACOS"
790 /* see os_dep.c for details of global data segments. */
791 # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
792 # define DATAEND /* not needed */
793 # endif
794 # ifdef LINUX
795 # if defined(__powerpc64__)
796 # define ALIGNMENT 8
797 # define CPP_WORDSZ 64
798 # ifndef HBLKSIZE
799 # define HBLKSIZE 4096
800 # endif
801 # else
802 # define ALIGNMENT 4
803 # endif
804 # define OS_TYPE "LINUX"
805 /* HEURISTIC1 has been reliably reported to fail for a 32-bit */
806 /* executable on a 64 bit kernel. */
807 # define LINUX_STACKBOTTOM
808 # define DYNAMIC_LOADING
809 # define SEARCH_FOR_DATA_START
810 extern int _end[];
811 # define DATAEND (_end)
812 # endif
813 # ifdef DARWIN
814 # define OS_TYPE "DARWIN"
815 # define DYNAMIC_LOADING
816 # if defined(__ppc64__)
817 # define ALIGNMENT 8
818 # define CPP_WORDSZ 64
819 # define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
820 # define CACHE_LINE_SIZE 64
821 # ifndef HBLKSIZE
822 # define HBLKSIZE 4096
823 # endif
824 # else
825 # define ALIGNMENT 4
826 # define STACKBOTTOM ((ptr_t) 0xc0000000)
827 # endif
828 /* XXX: see get_end(3), get_etext() and get_end() should not be used.
829 These aren't used when dyld support is enabled (it is by default) */
830 # define DATASTART ((ptr_t) get_etext())
831 # define DATAEND ((ptr_t) get_end())
832 # define USE_MMAP
833 # define USE_MMAP_ANON
834 # define USE_ASM_PUSH_REGS
835 # ifdef GC_DARWIN_THREADS
836 # define MPROTECT_VDB
837 # endif
838 # include <unistd.h>
839 # define GETPAGESIZE() getpagesize()
840 # if defined(USE_PPC_PREFETCH) && defined(__GNUC__)
841 /* The performance impact of prefetches is untested */
842 # define PREFETCH(x) \
843 __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))
844 # define PREFETCH_FOR_WRITE(x) \
845 __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))
846 # endif
847 /* There seems to be some issues with trylock hanging on darwin. This
848 should be looked into some more */
849 # define NO_PTHREAD_TRYLOCK
850 # endif
851 # ifdef FREEBSD
852 # if defined(__powerpc64__)
853 # define ALIGNMENT 8
854 # define CPP_WORDSZ 64
855 # ifndef HBLKSIZE
856 # define HBLKSIZE 4096
857 # endif
858 # else
859 # define ALIGNMENT 4
860 # endif
861 # define OS_TYPE "FREEBSD"
862 # ifndef GC_FREEBSD_THREADS
863 # define MPROTECT_VDB
864 # endif
865 # define SIG_SUSPEND SIGUSR1
866 # define SIG_THR_RESTART SIGUSR2
867 # define FREEBSD_STACKBOTTOM
868 # ifdef __ELF__
869 # define DYNAMIC_LOADING
870 # endif
871 extern char etext[];
872 extern char * GC_FreeBSDGetDataStart();
873 # define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
874 # endif
875 # ifdef NETBSD
876 # define ALIGNMENT 4
877 # define OS_TYPE "NETBSD"
878 # define HEURISTIC2
879 extern char etext[];
880 # define DATASTART GC_data_start
881 # define DYNAMIC_LOADING
882 # endif
883 # ifdef NOSYS
884 # define ALIGNMENT 4
885 # define OS_TYPE "NOSYS"
886 extern void __end[], __dso_handle[];
887 # define DATASTART (__dso_handle) /* OK, that's ugly. */
888 # define DATAEND (__end)
889 /* Stack starts at 0xE0000000 for the simulator. */
890 # undef STACK_GRAN
891 # define STACK_GRAN 0x10000000
892 # define HEURISTIC1
893 # endif
894 # endif
895
896 # ifdef VAX
897 # define MACH_TYPE "VAX"
898 # define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
899 extern char etext[];
900 # define DATASTART ((ptr_t)(etext))
901 # ifdef BSD
902 # define OS_TYPE "BSD"
903 # define HEURISTIC1
904 /* HEURISTIC2 may be OK, but it's hard to test. */
905 # endif
906 # ifdef ULTRIX
907 # define OS_TYPE "ULTRIX"
908 # define STACKBOTTOM ((ptr_t) 0x7fffc800)
909 # endif
910 # endif
911
912 # ifdef RT
913 # define MACH_TYPE "RT"
914 # define ALIGNMENT 4
915 # define DATASTART ((ptr_t) 0x10000000)
916 # define STACKBOTTOM ((ptr_t) 0x1fffd800)
917 # endif
918
919 # ifdef SPARC
920 # define MACH_TYPE "SPARC"
921 # if defined(__arch64__) || defined(__sparcv9)
922 # define ALIGNMENT 8
923 # define CPP_WORDSZ 64
924 # define ELF_CLASS ELFCLASS64
925 # else
926 # define ALIGNMENT 4 /* Required by hardware */
927 # define CPP_WORDSZ 32
928 # endif
929 # define ALIGN_DOUBLE
930 # ifdef SUNOS5
931 # define OS_TYPE "SUNOS5"
932 extern int _etext[];
933 extern int _end[];
934 extern ptr_t GC_SysVGetDataStart();
935 # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
936 # define DATAEND (_end)
937 # if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
938 # define USE_MMAP
939 /* Otherwise we now use calloc. Mmap may result in the */
940 /* heap interleaved with thread stacks, which can result in */
941 /* excessive blacklisting. Sbrk is unusable since it */
942 /* doesn't interact correctly with the system malloc. */
943 # endif
944 # ifdef USE_MMAP
945 # define HEAP_START (ptr_t)0x40000000
946 # else
947 # define HEAP_START DATAEND
948 # endif
949 # define PROC_VDB
950 # define SOLARIS_STACKBOTTOM
951 # include <unistd.h>
952 # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
953 /* getpagesize() appeared to be missing from at least one */
954 /* Solaris 5.4 installation. Weird. */
955 # define DYNAMIC_LOADING
956 # endif
957 # ifdef SUNOS4
958 # define OS_TYPE "SUNOS4"
959 /* [If you have a weak stomach, don't read this.] */
960 /* We would like to use: */
961 /* # define DATASTART ((ptr_t)((((word) (etext)) + 0x1fff) & ~0x1fff)) */
962 /* This fails occasionally, due to an ancient, but very */
963 /* persistent ld bug. etext is set 32 bytes too high. */
964 /* We instead read the text segment size from the a.out */
965 /* header, which happens to be mapped into our address space */
966 /* at the start of the text segment. The detective work here */
967 /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
968 /* Serpette of INRIA. */
969 /* This assumes ZMAGIC, i.e. demand-loadable executables. */
970 # define TEXTSTART 0x2000
971 # define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
972 # define MPROTECT_VDB
973 # define HEURISTIC1
974 # define DYNAMIC_LOADING
975 # endif
976 # ifdef DRSNX
977 # define OS_TYPE "DRSNX"
978 extern ptr_t GC_SysVGetDataStart();
979 extern int etext[];
980 # define DATASTART GC_SysVGetDataStart(0x10000, etext)
981 # define MPROTECT_VDB
982 # define STACKBOTTOM ((ptr_t) 0xdfff0000)
983 # define DYNAMIC_LOADING
984 # endif
985 # ifdef LINUX
986 # define OS_TYPE "LINUX"
987 # ifdef __ELF__
988 # define DYNAMIC_LOADING
989 # else
990 Linux Sparc/a.out not supported
991 # endif
992 extern int _end[];
993 extern int _etext[];
994 # define DATAEND (_end)
995 # define SVR4
996 extern ptr_t GC_SysVGetDataStart();
997 # ifdef __arch64__
998 # define DATASTART GC_SysVGetDataStart(0x100000, _etext)
999 # else
1000 # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
1001 # endif
1002 # define LINUX_STACKBOTTOM
1003 # endif
1004 # ifdef OPENBSD
1005 # define OS_TYPE "OPENBSD"
1006 # define STACKBOTTOM ((ptr_t) 0xf8000000)
1007 extern int etext[];
1008 # define DATASTART ((ptr_t)(etext))
1009 # endif
1010 # ifdef NETBSD
1011 # define OS_TYPE "NETBSD"
1012 # define HEURISTIC2
1013 # ifdef __ELF__
1014 # define DATASTART GC_data_start
1015 # define DYNAMIC_LOADING
1016 # else
1017 extern char etext[];
1018 # define DATASTART ((ptr_t)(etext))
1019 # endif
1020 # endif
1021 # ifdef FREEBSD
1022 # define OS_TYPE "FREEBSD"
1023 # define SIG_SUSPEND SIGUSR1
1024 # define SIG_THR_RESTART SIGUSR2
1025 # define FREEBSD_STACKBOTTOM
1026 # ifdef __ELF__
1027 # define DYNAMIC_LOADING
1028 # endif
1029 extern char etext[];
1030 extern char edata[];
1031 extern char end[];
1032 # define NEED_FIND_LIMIT
1033 # define DATASTART ((ptr_t)(&etext))
1034 # define DATAEND (GC_find_limit (DATASTART, TRUE))
1035 # define DATASTART2 ((ptr_t)(&edata))
1036 # define DATAEND2 ((ptr_t)(&end))
1037 # endif
1038 # endif
1039
1040 # ifdef I386
1041 # define MACH_TYPE "I386"
1042 # if defined(__LP64__) || defined(_WIN64)
1043 # define CPP_WORDSZ 64
1044 # define ALIGNMENT 8
1045 # else
1046 # define CPP_WORDSZ 32
1047 # define ALIGNMENT 4
1048 /* Appears to hold for all "32 bit" compilers */
1049 /* except Borland. The -a4 option fixes */
1050 /* Borland. */
1051 /* Ivan Demakov: For Watcom the option is -zp4. */
1052 # endif
1053 # ifndef SMALL_CONFIG
1054 # define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
1055 /* improvement on Pentiums. */
1056 # endif
1057 # ifdef HAVE_BUILTIN_UNWIND_INIT
1058 # define USE_GENERIC_PUSH_REGS
1059 # endif
1060 # ifdef SEQUENT
1061 # define OS_TYPE "SEQUENT"
1062 extern int etext[];
1063 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
1064 # define STACKBOTTOM ((ptr_t) 0x3ffff000)
1065 # endif
1066 # ifdef BEOS
1067 # define OS_TYPE "BEOS"
1068 # include <OS.h>
1069 # define GETPAGESIZE() B_PAGE_SIZE
1070 extern int etext[];
1071 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
1072 # endif
1073 # ifdef SUNOS5
1074 # define OS_TYPE "SUNOS5"
1075 extern int _etext[], _end[];
1076 extern ptr_t GC_SysVGetDataStart();
1077 # define DATASTART GC_SysVGetDataStart(0x1000, _etext)
1078 # define DATAEND (_end)
1079 # define SOLARIS_STACKBOTTOM
1080 /* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
1081 /* It appears to be fixed in 2.8 and 2.9. */
1082 # ifdef SOLARIS25_PROC_VDB_BUG_FIXED
1083 # define PROC_VDB
1084 # endif
1085 # define DYNAMIC_LOADING
1086 # if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
1087 # define USE_MMAP
1088 /* Otherwise we now use calloc. Mmap may result in the */
1089 /* heap interleaved with thread stacks, which can result in */
1090 /* excessive blacklisting. Sbrk is unusable since it */
1091 /* doesn't interact correctly with the system malloc. */
1092 # endif
1093 # ifdef USE_MMAP
1094 # define HEAP_START (ptr_t)0x40000000
1095 # else
1096 # define HEAP_START DATAEND
1097 # endif
1098 # endif
1099 # ifdef SCO
1100 # define OS_TYPE "SCO"
1101 extern int etext[];
1102 # define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
1103 & ~0x3fffff) \
1104 +((word)etext & 0xfff))
1105 # define STACKBOTTOM ((ptr_t) 0x7ffffffc)
1106 # endif
1107 # ifdef SCO_ELF
1108 # define OS_TYPE "SCO_ELF"
1109 extern int etext[];
1110 # define DATASTART ((ptr_t)(etext))
1111 # define STACKBOTTOM ((ptr_t) 0x08048000)
1112 # define DYNAMIC_LOADING
1113 # define ELF_CLASS ELFCLASS32
1114 # endif
1115 # ifdef DGUX
1116 # define OS_TYPE "DGUX"
1117 extern int _etext, _end;
1118 extern ptr_t GC_SysVGetDataStart();
1119 # define DATASTART GC_SysVGetDataStart(0x1000, &_etext)
1120 # define DATAEND (&_end)
1121 # define STACK_GROWS_DOWN
1122 # define HEURISTIC2
1123 # include <unistd.h>
1124 # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
1125 # define DYNAMIC_LOADING
1126 # ifndef USE_MMAP
1127 # define USE_MMAP
1128 # endif /* USE_MMAP */
1129 # define MAP_FAILED (void *) -1
1130 # ifdef USE_MMAP
1131 # define HEAP_START (ptr_t)0x40000000
1132 # else /* USE_MMAP */
1133 # define HEAP_START DATAEND
1134 # endif /* USE_MMAP */
1135 # endif /* DGUX */
1136
1137 # ifdef LINUX
1138 # ifndef __GNUC__
1139 /* The Intel compiler doesn't like inline assembly */
1140 # define USE_GENERIC_PUSH_REGS
1141 # endif
1142 # define OS_TYPE "LINUX"
1143 # define LINUX_STACKBOTTOM
1144 # if 0
1145 # define HEURISTIC1
1146 # undef STACK_GRAN
1147 # define STACK_GRAN 0x10000000
1148 /* STACKBOTTOM is usually 0xc0000000, but this changes with */
1149 /* different kernel configurations. In particular, systems */
1150 /* with 2GB physical memory will usually move the user */
1151 /* address space limit, and hence initial SP to 0x80000000. */
1152 # endif
1153 # if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
1154 # define MPROTECT_VDB
1155 # else
1156 /* We seem to get random errors in incremental mode, */
1157 /* possibly because Linux threads is itself a malloc client */
1158 /* and can't deal with the signals. */
1159 # endif
1160 # define HEAP_START (ptr_t)0x1000
1161 /* This encourages mmap to give us low addresses, */
1162 /* thus allowing the heap to grow to ~3GB */
1163 # ifdef __ELF__
1164 # define DYNAMIC_LOADING
1165 # ifdef UNDEFINED /* includes ro data */
1166 extern int _etext[];
1167 # define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
1168 # endif
1169 # include <features.h>
1170 # if defined(__GLIBC__) && __GLIBC__ >= 2
1171 # define SEARCH_FOR_DATA_START
1172 # else
1173 extern char **__environ;
1174 # define DATASTART ((ptr_t)(&__environ))
1175 /* hideous kludge: __environ is the first */
1176 /* word in crt0.o, and delimits the start */
1177 /* of the data segment, no matter which */
1178 /* ld options were passed through. */
1179 /* We could use _etext instead, but that */
1180 /* would include .rodata, which may */
1181 /* contain large read-only data tables */
1182 /* that we'd rather not scan. */
1183 # endif
1184 extern int _end[];
1185 # define DATAEND (_end)
1186 # else
1187 extern int etext[];
1188 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
1189 # endif
1190 # ifdef USE_I686_PREFETCH
1191 /* FIXME: Thus should use __builtin_prefetch, but we'll leave that */
1192 /* for the next rtelease. */
1193 # define PREFETCH(x) \
1194 __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
1195 /* Empirically prefetcht0 is much more effective at reducing */
1196 /* cache miss stalls for the targetted load instructions. But it */
1197 /* seems to interfere enough with other cache traffic that the net */
1198 /* result is worse than prefetchnta. */
1199 # if 0
1200 /* Using prefetches for write seems to have a slight negative */
1201 /* impact on performance, at least for a PIII/500. */
1202 # define PREFETCH_FOR_WRITE(x) \
1203 __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
1204 # endif
1205 # endif
1206 # ifdef USE_3DNOW_PREFETCH
1207 # define PREFETCH(x) \
1208 __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
1209 # define PREFETCH_FOR_WRITE(x) \
1210 __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
1211 # endif
1212 # endif
1213 # ifdef CYGWIN32
1214 # define OS_TYPE "CYGWIN32"
1215 # define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */
1216 # define DATAEND ((ptr_t)GC_DATAEND)
1217 # undef STACK_GRAN
1218 # define STACK_GRAN 0x10000
1219 # define HEURISTIC1
1220 # endif
1221 # ifdef OS2
1222 # define OS_TYPE "OS2"
1223 /* STACKBOTTOM and DATASTART are handled specially in */
1224 /* os_dep.c. OS2 actually has the right */
1225 /* system call! */
1226 # define DATAEND /* not needed */
1227 # define USE_GENERIC_PUSH_REGS
1228 # endif
1229 # ifdef MSWIN32
1230 # define OS_TYPE "MSWIN32"
1231 /* STACKBOTTOM and DATASTART are handled specially in */
1232 /* os_dep.c. */
1233 # ifndef __WATCOMC__
1234 # define MPROTECT_VDB
1235 # endif
1236 # define DATAEND /* not needed */
1237 # endif
1238 # ifdef MSWINCE
1239 # define OS_TYPE "MSWINCE"
1240 # define DATAEND /* not needed */
1241 # endif
1242 # ifdef DJGPP
1243 # define OS_TYPE "DJGPP"
1244 # include "stubinfo.h"
1245 extern int etext[];
1246 extern int _stklen;
1247 extern int __djgpp_stack_limit;
1248 # define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))
1249 /* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
1250 + _stklen)) */
1251 # define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
1252 /* This may not be right. */
1253 # endif
1254 # ifdef OPENBSD
1255 # define OS_TYPE "OPENBSD"
1256 # endif
1257 # ifdef FREEBSD
1258 # define OS_TYPE "FREEBSD"
1259 # ifndef GC_FREEBSD_THREADS
1260 # define MPROTECT_VDB
1261 # endif
1262 # ifdef __GLIBC__
1263 # define SIG_SUSPEND (32+6)
1264 # define SIG_THR_RESTART (32+5)
1265 extern int _end[];
1266 # define DATAEND (_end)
1267 # else
1268 # define SIG_SUSPEND SIGUSR1
1269 # define SIG_THR_RESTART SIGUSR2
1270 # endif
1271 # define FREEBSD_STACKBOTTOM
1272 # ifdef __ELF__
1273 # define DYNAMIC_LOADING
1274 # endif
1275 extern char etext[];
1276 extern char * GC_FreeBSDGetDataStart();
1277 # define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
1278 # endif
1279 # ifdef NETBSD
1280 # define OS_TYPE "NETBSD"
1281 # ifdef __ELF__
1282 # define DYNAMIC_LOADING
1283 # endif
1284 # endif
1285 # ifdef THREE86BSD
1286 # define OS_TYPE "THREE86BSD"
1287 # endif
1288 # ifdef BSDI
1289 # define OS_TYPE "BSDI"
1290 # endif
1291 # if defined(OPENBSD) || defined(NETBSD) \
1292 || defined(THREE86BSD) || defined(BSDI)
1293 # define HEURISTIC2
1294 extern char etext[];
1295 # define DATASTART ((ptr_t)(etext))
1296 # endif
1297 # ifdef NEXT
1298 # define OS_TYPE "NEXT"
1299 # define DATASTART ((ptr_t) get_etext())
1300 # define STACKBOTTOM ((ptr_t)0xc0000000)
1301 # define DATAEND /* not needed */
1302 # endif
1303 # ifdef DOS4GW
1304 # define OS_TYPE "DOS4GW"
1305 extern long __nullarea;
1306 extern char _end;
1307 extern char *_STACKTOP;
1308 /* Depending on calling conventions Watcom C either precedes
1309 or does not precedes with undescore names of C-variables.
1310 Make sure startup code variables always have the same names. */
1311 #pragma aux __nullarea "*";
1312 #pragma aux _end "*";
1313 # define STACKBOTTOM ((ptr_t) _STACKTOP)
1314 /* confused? me too. */
1315 # define DATASTART ((ptr_t) &__nullarea)
1316 # define DATAEND ((ptr_t) &_end)
1317 # endif
1318 # ifdef HURD
1319 # define OS_TYPE "HURD"
1320 # define STACK_GROWS_DOWN
1321 # define HEURISTIC2
1322 # define SIG_SUSPEND SIGUSR1
1323 # define SIG_THR_RESTART SIGUSR2
1324 # define SEARCH_FOR_DATA_START
1325 extern int _end[];
1326 # define DATAEND ( (ptr_t) (_end))
1327 /* # define MPROTECT_VDB Not quite working yet? */
1328 # define DYNAMIC_LOADING
1329 # endif
1330 # ifdef DARWIN
1331 # define OS_TYPE "DARWIN"
1332 # define DARWIN_DONT_PARSE_STACK
1333 # define DYNAMIC_LOADING
1334 /* XXX: see get_end(3), get_etext() and get_end() should not be used.
1335 These aren't used when dyld support is enabled (it is by default) */
1336 # define DATASTART ((ptr_t) get_etext())
1337 # define DATAEND ((ptr_t) get_end())
1338 # ifdef HAVE_PTHREAD_GET_STACKADDR_NP
1339 # define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self())
1340 # else
1341 # define STACKBOTTOM ((ptr_t) 0xc0000000)
1342 # endif
1343 # define USE_MMAP
1344 # define USE_MMAP_ANON
1345 # define USE_ASM_PUSH_REGS
1346 # ifdef GC_DARWIN_THREADS
1347 # define MPROTECT_VDB
1348 # endif
1349 # include <unistd.h>
1350 # define GETPAGESIZE() getpagesize()
1351 /* There seems to be some issues with trylock hanging on darwin. This
1352 should be looked into some more */
1353 # define NO_PTHREAD_TRYLOCK
1354 # endif /* DARWIN */
1355 # endif
1356
1357 # ifdef NS32K
1358 # define MACH_TYPE "NS32K"
1359 # define ALIGNMENT 4
1360 extern char **environ;
1361 # define DATASTART ((ptr_t)(&environ))
1362 /* hideous kludge: environ is the first */
1363 /* word in crt0.o, and delimits the start */
1364 /* of the data segment, no matter which */
1365 /* ld options were passed through. */
1366 # define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
1367 # endif
1368
1369 # ifdef MIPS
1370 # define MACH_TYPE "MIPS"
1371 # ifdef LINUX
1372 /* This was developed for a linuxce style platform. Probably */
1373 /* needs to be tweaked for workstation class machines. */
1374 # define OS_TYPE "LINUX"
1375 # define DYNAMIC_LOADING
1376 extern int _end[];
1377 # define DATAEND (_end)
1378 extern int __data_start[];
1379 # define DATASTART ((ptr_t)(__data_start))
1380 # ifdef _MIPS_SZPTR
1381 # define CPP_WORDSZ _MIPS_SZPTR
1382 # define ALIGNMENT (_MIPS_SZPTR/8)
1383 # else
1384 # define ALIGNMENT 4
1385 # endif
1386 # ifndef HBLKSIZE
1387 # define HBLKSIZE 4096
1388 # endif
1389 # define USE_GENERIC_PUSH_REGS
1390 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
1391 # define LINUX_STACKBOTTOM
1392 # else
1393 # define STACKBOTTOM 0x80000000
1394 # endif
1395 # endif /* Linux */
1396 # ifdef EWS4800
1397 # define HEURISTIC2
1398 # if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
1399 extern int _fdata[], _end[];
1400 # define DATASTART ((ptr_t)_fdata)
1401 # define DATAEND ((ptr_t)_end)
1402 # define CPP_WORDSZ _MIPS_SZPTR
1403 # define ALIGNMENT (_MIPS_SZPTR/8)
1404 # else
1405 extern int etext[], edata[], end[];
1406 extern int _DYNAMIC_LINKING[], _gp[];
1407 # define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \
1408 + ((word)etext & 0xffff)))
1409 # define DATAEND (edata)
1410 # define DATASTART2 (_DYNAMIC_LINKING \
1411 ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
1412 : (ptr_t)edata)
1413 # define DATAEND2 (end)
1414 # define ALIGNMENT 4
1415 # endif
1416 # define OS_TYPE "EWS4800"
1417 # define USE_GENERIC_PUSH_REGS 1
1418 # endif
1419 # ifdef ULTRIX
1420 # define HEURISTIC2
1421 # define DATASTART (ptr_t)0x10000000
1422 /* Could probably be slightly higher since */
1423 /* startup code allocates lots of stuff. */
1424 # define OS_TYPE "ULTRIX"
1425 # define ALIGNMENT 4
1426 # endif
1427 # ifdef RISCOS
1428 # define HEURISTIC2
1429 # define DATASTART (ptr_t)0x10000000
1430 # define OS_TYPE "RISCOS"
1431 # define ALIGNMENT 4 /* Required by hardware */
1432 # endif
1433 # ifdef IRIX5
1434 # define HEURISTIC2
1435 extern int _fdata[];
1436 # define DATASTART ((ptr_t)(_fdata))
1437 # ifdef USE_MMAP
1438 # define HEAP_START (ptr_t)0x30000000
1439 # else
1440 # define HEAP_START DATASTART
1441 # endif
1442 /* Lowest plausible heap address. */
1443 /* In the MMAP case, we map there. */
1444 /* In either case it is used to identify */
1445 /* heap sections so they're not */
1446 /* considered as roots. */
1447 # define OS_TYPE "IRIX5"
1448 /*# define MPROTECT_VDB DOB: this should work, but there is evidence */
1449 /* of recent breakage. */
1450 # ifdef _MIPS_SZPTR
1451 # define CPP_WORDSZ _MIPS_SZPTR
1452 # define ALIGNMENT (_MIPS_SZPTR/8)
1453 # if CPP_WORDSZ != 64
1454 # define ALIGN_DOUBLE
1455 # endif
1456 # if _MIPS_SZPTR == 64
1457 # define ELF_CLASS ELFCLASS64
1458 # endif
1459 # else
1460 # define ALIGNMENT 4
1461 # define ALIGN_DOUBLE
1462 # endif
1463 # define DYNAMIC_LOADING
1464 # endif
1465 # ifdef MSWINCE
1466 # define OS_TYPE "MSWINCE"
1467 # define ALIGNMENT 4
1468 # define DATAEND /* not needed */
1469 # endif
1470 # if defined(NETBSD)
1471 # define ALIGNMENT 4
1472 # define OS_TYPE "NETBSD"
1473 # define HEURISTIC2
1474 # define USE_GENERIC_PUSH_REGS
1475 # ifdef __ELF__
1476 extern int etext[];
1477 # define DATASTART GC_data_start
1478 # define NEED_FIND_LIMIT
1479 # define DYNAMIC_LOADING
1480 # else
1481 # define DATASTART ((ptr_t) 0x10000000)
1482 # define STACKBOTTOM ((ptr_t) 0x7ffff000)
1483 # endif /* _ELF_ */
1484 # endif
1485 # endif
1486
1487 # ifdef RS6000
1488 # define MACH_TYPE "RS6000"
1489 # ifdef ALIGNMENT
1490 # undef ALIGNMENT
1491 # endif
1492 # ifdef IA64
1493 # undef IA64 /* DOB: some AIX installs stupidly define IA64 in /usr/include/sys/systemcfg.h */
1494 # endif
1495 # ifdef __64BIT__
1496 # define ALIGNMENT 8
1497 # define CPP_WORDSZ 64
1498 # define STACKBOTTOM ((ptr_t)0x1000000000000000)
1499 # else
1500 # define ALIGNMENT 4
1501 # define CPP_WORDSZ 32
1502 # define STACKBOTTOM ((ptr_t)((ulong)&errno))
1503 # endif
1504 # define USE_MMAP
1505 # define USE_MMAP_ANON
1506 /* From AIX linker man page:
1507 _text Specifies the first location of the program.
1508 _etext Specifies the first location after the program.
1509 _data Specifies the first location of the data.
1510 _edata Specifies the first location after the initialized data
1511 _end or end Specifies the first location after all data.
1512 */
1513 extern int _data[], _end[];
1514 # define DATASTART ((ptr_t)((ulong)_data))
1515 # define DATAEND ((ptr_t)((ulong)_end))
1516 extern int errno;
1517 # define USE_GENERIC_PUSH_REGS
1518 # define DYNAMIC_LOADING
1519 /* For really old versions of AIX, this may have to be removed. */
1520 # endif
1521
1522 # ifdef HP_PA
1523 # define MACH_TYPE "HP_PA"
1524 # ifdef __LP64__
1525 # define CPP_WORDSZ 64
1526 # define ALIGNMENT 8
1527 # else
1528 # define CPP_WORDSZ 32
1529 # define ALIGNMENT 4
1530 # define ALIGN_DOUBLE
1531 # endif
1532 # if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)
1533 # ifndef LINUX /* For now. */
1534 # define MPROTECT_VDB
1535 # endif
1536 # else
1537 # define GENERIC_COMPARE_AND_SWAP
1538 /* No compare-and-swap instruction. Use pthread mutexes */
1539 /* when we absolutely have to. */
1540 # ifdef PARALLEL_MARK
1541 # define USE_MARK_BYTES
1542 /* Minimize compare-and-swap usage. */
1543 # endif
1544 # endif
1545 # define STACK_GROWS_UP
1546 # ifdef HPUX
1547 # define OS_TYPE "HPUX"
1548 extern int __data_start[];
1549 # define DATASTART ((ptr_t)(__data_start))
1550 # if 0
1551 /* The following appears to work for 7xx systems running HP/UX */
1552 /* 9.xx Furthermore, it might result in much faster */
1553 /* collections than HEURISTIC2, which may involve scanning */
1554 /* segments that directly precede the stack. It is not the */
1555 /* default, since it may not work on older machine/OS */
1556 /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
1557 /* this.) */
1558 # define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */
1559 # else
1560 /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
1561 /* to this. Note that the GC must be initialized before the */
1562 /* first putenv call. */
1563 extern char ** environ;
1564 # define STACKBOTTOM ((ptr_t)environ)
1565 # endif
1566 # define DYNAMIC_LOADING
1567 # include <unistd.h>
1568 # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
1569 # ifndef __GNUC__
1570 # define PREFETCH(x) { \
1571 register long addr = (long)(x); \
1572 (void) _asm ("LDW", 0, 0, addr, 0); \
1573 }
1574 # endif
1575 # endif /* HPUX */
1576 # ifdef LINUX
1577 # define OS_TYPE "LINUX"
1578 # define LINUX_STACKBOTTOM
1579 # define DYNAMIC_LOADING
1580 # define SEARCH_FOR_DATA_START
1581 extern int _end[];
1582 # define DATAEND (&_end)
1583 # endif /* LINUX */
1584 # endif /* HP_PA */
1585
1586 # ifdef ALPHA
1587 # define MACH_TYPE "ALPHA"
1588 # define ALIGNMENT 8
1589 # define CPP_WORDSZ 64
1590 # ifndef LINUX
1591 # define USE_GENERIC_PUSH_REGS
1592 /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
1593 /* fp registers in some cases when the target is a 21264. The assembly */
1594 /* code doesn't handle that yet, and version dependencies make that a */
1595 /* bit tricky. Do the easy thing for now. */
1596 # endif
1597 # ifdef NETBSD
1598 # define OS_TYPE "NETBSD"
1599 # define HEURISTIC2
1600 # define DATASTART GC_data_start
1601 # define ELFCLASS32 32
1602 # define ELFCLASS64 64
1603 # define ELF_CLASS ELFCLASS64
1604 # define DYNAMIC_LOADING
1605 # endif
1606 # ifdef OPENBSD
1607 # define OS_TYPE "OPENBSD"
1608 # define HEURISTIC2
1609 # ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */
1610 # define DATASTART GC_data_start
1611 # define ELFCLASS32 32
1612 # define ELFCLASS64 64
1613 # define ELF_CLASS ELFCLASS64
1614 # else /* ECOFF, until OpenBSD/Alpha 2.7 */
1615 # define DATASTART ((ptr_t) 0x140000000)
1616 # endif
1617 # endif
1618 # ifdef FREEBSD
1619 # define OS_TYPE "FREEBSD"
1620 /* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
1621 # define SIG_SUSPEND SIGUSR1
1622 # define SIG_THR_RESTART SIGUSR2
1623 # define FREEBSD_STACKBOTTOM
1624 # ifdef __ELF__
1625 # define DYNAMIC_LOADING
1626 # endif
1627 /* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
1628 extern char etext[];
1629 extern char edata[];
1630 extern char end[];
1631 # define NEED_FIND_LIMIT
1632 # define DATASTART ((ptr_t)(&etext))
1633 # define DATAEND (GC_find_limit (DATASTART, TRUE))
1634 # define DATASTART2 ((ptr_t)(&edata))
1635 # define DATAEND2 ((ptr_t)(&end))
1636 # endif
1637 # ifdef OSF1
1638 # define OS_TYPE "OSF1"
1639 # define DATASTART ((ptr_t) 0x140000000)
1640 extern int _end[];
1641 # define DATAEND ((ptr_t) &_end)
1642 extern char ** environ;
1643 /* round up from the value of environ to the nearest page boundary */
1644 /* Probably breaks if putenv is called before collector */
1645 /* initialization. */
1646 # define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
1647 /* # define HEURISTIC2 */
1648 /* Normally HEURISTIC2 is too conervative, since */
1649 /* the text segment immediately follows the stack. */
1650 /* Hence we give an upper pound. */
1651 /* This is currently unused, since we disabled HEURISTIC2 */
1652 extern int __start[];
1653 # define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
1654 # ifndef GC_OSF1_THREADS
1655 /* Unresolved signal issues with threads. */
1656 # define MPROTECT_VDB
1657 # endif
1658 # define DYNAMIC_LOADING
1659 # endif
1660 # ifdef LINUX
1661 # define OS_TYPE "LINUX"
1662 # define LINUX_STACKBOTTOM
1663 # ifdef __ELF__
1664 # define SEARCH_FOR_DATA_START
1665 # define DYNAMIC_LOADING
1666 # else
1667 # define DATASTART ((ptr_t) 0x140000000)
1668 # endif
1669 extern int _end[];
1670 # define DATAEND (_end)
1671 # define MPROTECT_VDB
1672 /* Has only been superficially tested. May not */
1673 /* work on all versions. */
1674 # endif
1675 # endif
1676
1677 # ifdef IA64
1678 # define MACH_TYPE "IA64"
1679 # define USE_GENERIC_PUSH_REGS
1680 /* We need to get preserved registers in addition to register */
1681 /* windows. That's easiest to do with setjmp. */
1682 # ifdef PARALLEL_MARK
1683 # define USE_MARK_BYTES
1684 /* Compare-and-exchange is too expensive to use for */
1685 /* setting mark bits. */
1686 # endif
1687 # ifdef HPUX
1688 # ifdef _ILP32
1689 # define CPP_WORDSZ 32
1690 # define ALIGN_DOUBLE
1691 /* Requires 8 byte alignment for malloc */
1692 # define ALIGNMENT 4
1693 # else
1694 # ifndef _LP64
1695 ---> unknown ABI
1696 # endif
1697 # define CPP_WORDSZ 64
1698 # define ALIGN_DOUBLE
1699 /* Requires 16 byte alignment for malloc */
1700 # define ALIGNMENT 8
1701 # endif
1702 # define OS_TYPE "HPUX"
1703 extern int __data_start[];
1704 # define DATASTART ((ptr_t)(__data_start))
1705 /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
1706 /* to this. Note that the GC must be initialized before the */
1707 /* first putenv call. */
1708 extern char ** environ;
1709 # define STACKBOTTOM ((ptr_t)environ)
1710 # define HPUX_STACKBOTTOM
1711 # define DYNAMIC_LOADING
1712 # include <unistd.h>
1713 # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
1714 /* The following was empirically determined, and is probably */
1715 /* not very robust. */
1716 /* Note that the backing store base seems to be at a nice */
1717 /* address minus one page. */
1718 # define BACKING_STORE_DISPLACEMENT 0x1000000
1719 # define BACKING_STORE_ALIGNMENT 0x1000
1720 extern ptr_t GC_register_stackbottom;
1721 # define BACKING_STORE_BASE GC_register_stackbottom
1722 /* Known to be wrong for recent HP/UX versions!!! */
1723 # endif
1724 # ifdef LINUX
1725 # define CPP_WORDSZ 64
1726 # define ALIGN_DOUBLE
1727 /* Requires 16 byte alignment for malloc */
1728 # define ALIGNMENT 8
1729 # define OS_TYPE "LINUX"
1730 /* The following works on NUE and older kernels: */
1731 /* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */
1732 /* This does not work on NUE: */
1733 # define LINUX_STACKBOTTOM
1734 /* We also need the base address of the register stack */
1735 /* backing store. This is computed in */
1736 /* GC_linux_register_stack_base based on the following */
1737 /* constants: */
1738 # define BACKING_STORE_ALIGNMENT 0x100000
1739 # define BACKING_STORE_DISPLACEMENT 0x80000000
1740 extern ptr_t GC_register_stackbottom;
1741 # define BACKING_STORE_BASE GC_register_stackbottom
1742 # define SEARCH_FOR_DATA_START
1743 # ifdef __GNUC__
1744 # define DYNAMIC_LOADING
1745 # else
1746 /* In the Intel compiler environment, we seem to end up with */
1747 /* statically linked executables and an undefined reference */
1748 /* to _DYNAMIC */
1749 # endif
1750 # define MPROTECT_VDB
1751 /* Requires Linux 2.3.47 or later. */
1752 extern int _end[];
1753 # define DATAEND (_end)
1754 # ifdef __GNUC__
1755 # ifndef __INTEL_COMPILER
1756 # define PREFETCH(x) \
1757 __asm__ (" lfetch [%0]": : "r"(x))
1758 # define PREFETCH_FOR_WRITE(x) \
1759 __asm__ (" lfetch.excl [%0]": : "r"(x))
1760 # define CLEAR_DOUBLE(x) \
1761 __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
1762 # else
1763 # include <ia64intrin.h>
1764 # define PREFETCH(x) \
1765 __lfetch(__lfhint_none, (x))
1766 # define PREFETCH_FOR_WRITE(x) \
1767 __lfetch(__lfhint_nta, (x))
1768 # define CLEAR_DOUBLE(x) \
1769 __stf_spill((void *)(x), 0)
1770 # endif // __INTEL_COMPILER
1771 # endif
1772 # endif
1773 # ifdef MSWIN32
1774 /* FIXME: This is a very partial guess. There is no port, yet. */
1775 # define OS_TYPE "MSWIN32"
1776 /* STACKBOTTOM and DATASTART are handled specially in */
1777 /* os_dep.c. */
1778 # define DATAEND /* not needed */
1779 # if defined(_WIN64)
1780 # define CPP_WORDSZ 64
1781 # else
1782 # define CPP_WORDSZ 32 /* Is this possible? */
1783 # endif
1784 # define ALIGNMENT 8
1785 # endif
1786 # endif
1787
1788 # ifdef M88K
1789 # define MACH_TYPE "M88K"
1790 # define ALIGNMENT 4
1791 # define ALIGN_DOUBLE
1792 extern int etext[];
1793 # ifdef CX_UX
1794 # define OS_TYPE "CX_UX"
1795 # define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
1796 # endif
1797 # ifdef DGUX
1798 # define OS_TYPE "DGUX"
1799 extern ptr_t GC_SysVGetDataStart();
1800 # define DATASTART GC_SysVGetDataStart(0x10000, etext)
1801 # endif
1802 # define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
1803 # endif
1804
1805 # ifdef S370
1806 /* If this still works, and if anyone cares, this should probably */
1807 /* be moved to the S390 category. */
1808 # define MACH_TYPE "S370"
1809 # define ALIGNMENT 4 /* Required by hardware */
1810 # define USE_GENERIC_PUSH_REGS
1811 # ifdef UTS4
1812 # define OS_TYPE "UTS4"
1813 extern int etext[];
1814 extern int _etext[];
1815 extern int _end[];
1816 extern ptr_t GC_SysVGetDataStart();
1817 # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
1818 # define DATAEND (_end)
1819 # define HEURISTIC2
1820 # endif
1821 # endif
1822
1823 # ifdef S390
1824 # define MACH_TYPE "S390"
1825 # define USE_GENERIC_PUSH_REGS
1826 # ifndef __s390x__
1827 # define ALIGNMENT 4
1828 # define CPP_WORDSZ 32
1829 # else
1830 # define ALIGNMENT 8
1831 # define CPP_WORDSZ 64
1832 # endif
1833 # ifndef HBLKSIZE
1834 # define HBLKSIZE 4096
1835 # endif
1836 # ifdef LINUX
1837 # define OS_TYPE "LINUX"
1838 # define LINUX_STACKBOTTOM
1839 # define DYNAMIC_LOADING
1840 extern int __data_start[];
1841 # define DATASTART ((ptr_t)(__data_start))
1842 extern int _end[];
1843 # define DATAEND (_end)
1844 # define CACHE_LINE_SIZE 256
1845 # define GETPAGESIZE() 4096
1846 # endif
1847 # endif
1848
1849 # if defined(PJ)
1850 # define ALIGNMENT 4
1851 extern int _etext[];
1852 # define DATASTART ((ptr_t)(_etext))
1853 # define HEURISTIC1
1854 # endif
1855
1856 # ifdef AARCH64
1857 # define CPP_WORDSZ 64
1858 # define MACH_TYPE "AARCH64"
1859 # define ALIGNMENT 8
1860 # ifndef HBLKSIZE
1861 # define HBLKSIZE 4096
1862 # endif
1863 # ifdef LINUX
1864 # define OS_TYPE "LINUX"
1865 # define LINUX_STACKBOTTOM
1866 # define USE_GENERIC_PUSH_REGS
1867 # define DYNAMIC_LOADING
1868 extern int __data_start[];
1869 # define DATASTART ((ptr_t)__data_start)
1870 extern char _end[];
1871 # define DATAEND ((ptr_t)(&_end))
1872 # endif
1873 # ifdef NOSYS
1874 /* __data_start is usually defined in the target linker script. */
1875 extern int __data_start[];
1876 # define DATASTART ((ptr_t)__data_start)
1877 extern void *__stack_base__;
1878 # define STACKBOTTOM ((ptr_t)__stack_base__)
1879 # endif
1880 # endif
1881
1882 # ifdef ARM32
1883 # define CPP_WORDSZ 32
1884 # define MACH_TYPE "ARM32"
1885 # define ALIGNMENT 4
1886 # ifdef NETBSD
1887 # define OS_TYPE "NETBSD"
1888 # define HEURISTIC2
1889 # ifdef __ELF__
1890 # define DATASTART GC_data_start
1891 # define DYNAMIC_LOADING
1892 # else
1893 extern char etext[];
1894 # define DATASTART ((ptr_t)(etext))
1895 # endif
1896 # define USE_GENERIC_PUSH_REGS
1897 # endif
1898 # ifdef LINUX
1899 # define OS_TYPE "LINUX"
1900 # define LINUX_STACKBOTTOM
1901 # undef STACK_GRAN
1902 # define STACK_GRAN 0x10000000
1903 # define USE_GENERIC_PUSH_REGS
1904 # ifdef __ELF__
1905 # define DYNAMIC_LOADING
1906 # include <features.h>
1907 # if defined(__GLIBC__) && __GLIBC__ >= 2
1908 # define SEARCH_FOR_DATA_START
1909 # else
1910 extern char **__environ;
1911 # define DATASTART ((ptr_t)(&__environ))
1912 /* hideous kludge: __environ is the first */
1913 /* word in crt0.o, and delimits the start */
1914 /* of the data segment, no matter which */
1915 /* ld options were passed through. */
1916 /* We could use _etext instead, but that */
1917 /* would include .rodata, which may */
1918 /* contain large read-only data tables */
1919 /* that we'd rather not scan. */
1920 # endif
1921 extern int _end[];
1922 # define DATAEND (_end)
1923 # else
1924 extern int etext[];
1925 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
1926 # endif
1927 # endif
1928 # ifdef MSWINCE
1929 # define OS_TYPE "MSWINCE"
1930 # define DATAEND /* not needed */
1931 # endif
1932 # ifdef NOSYS
1933 /* __data_start is usually defined in the target linker script. */
1934 extern int __data_start[];
1935 # define DATASTART (ptr_t)(__data_start)
1936 # define USE_GENERIC_PUSH_REGS
1937 /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */
1938 extern void *__stack_base__;
1939 # define STACKBOTTOM ((ptr_t) (__stack_base__))
1940 # endif
1941 #endif
1942
1943 # ifdef CRIS
1944 # define MACH_TYPE "CRIS"
1945 # define CPP_WORDSZ 32
1946 # define ALIGNMENT 1
1947 # define OS_TYPE "LINUX"
1948 # define DYNAMIC_LOADING
1949 # define LINUX_STACKBOTTOM
1950 # define USE_GENERIC_PUSH_REGS
1951 # define SEARCH_FOR_DATA_START
1952 extern int _end[];
1953 # define DATAEND (_end)
1954 # endif
1955
1956 # ifdef SH
1957 # define MACH_TYPE "SH"
1958 # define ALIGNMENT 4
1959 # ifdef MSWINCE
1960 # define OS_TYPE "MSWINCE"
1961 # define DATAEND /* not needed */
1962 # endif
1963 # ifdef LINUX
1964 # define OS_TYPE "LINUX"
1965 # define LINUX_STACKBOTTOM
1966 # define USE_GENERIC_PUSH_REGS
1967 # define DYNAMIC_LOADING
1968 # define SEARCH_FOR_DATA_START
1969 extern int _end[];
1970 # define DATAEND (_end)
1971 # endif
1972 # ifdef NETBSD
1973 # define OS_TYPE "NETBSD"
1974 # define HEURISTIC2
1975 # define DATASTART GC_data_start
1976 # define USE_GENERIC_PUSH_REGS
1977 # define DYNAMIC_LOADING
1978 # endif
1979 # endif
1980
1981 # ifdef SH4
1982 # define MACH_TYPE "SH4"
1983 # define OS_TYPE "MSWINCE"
1984 # define ALIGNMENT 4
1985 # define DATAEND /* not needed */
1986 # endif
1987
1988 # ifdef M32R
1989 # define CPP_WORDSZ 32
1990 # define MACH_TYPE "M32R"
1991 # define ALIGNMENT 4
1992 # ifdef LINUX
1993 # define OS_TYPE "LINUX"
1994 # define LINUX_STACKBOTTOM
1995 # undef STACK_GRAN
1996 # define STACK_GRAN 0x10000000
1997 # define USE_GENERIC_PUSH_REGS
1998 # define DYNAMIC_LOADING
1999 # define SEARCH_FOR_DATA_START
2000 extern int _end[];
2001 # define DATAEND (_end)
2002 # endif
2003 # endif
2004
2005 # ifdef X86_64
2006 # define MACH_TYPE "X86_64"
2007 # ifdef __ILP32__
2008 # define ALIGNMENT 4
2009 # define CPP_WORDSZ 32
2010 # else
2011 # define ALIGNMENT 8
2012 # define CPP_WORDSZ 64
2013 # endif
2014 # ifndef HBLKSIZE
2015 # define HBLKSIZE 4096
2016 # endif
2017 # define CACHE_LINE_SIZE 64
2018 # define USE_GENERIC_PUSH_REGS
2019 # ifdef LINUX
2020 # define OS_TYPE "LINUX"
2021 # define LINUX_STACKBOTTOM
2022 # if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
2023 # define MPROTECT_VDB
2024 # else
2025 /* We seem to get random errors in incremental mode, */
2026 /* possibly because Linux threads is itself a malloc client */
2027 /* and can't deal with the signals. */
2028 # endif
2029 # ifdef __ELF__
2030 # define DYNAMIC_LOADING
2031 # ifdef UNDEFINED /* includes ro data */
2032 extern int _etext[];
2033 # define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
2034 # endif
2035 # include <features.h>
2036 # define SEARCH_FOR_DATA_START
2037 extern int _end[];
2038 # define DATAEND (_end)
2039 # else
2040 extern int etext[];
2041 # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
2042 # endif
2043 # if defined(__GNUC__) && __GNUC >= 3
2044 # define PREFETCH(x) __builtin_prefetch((x), 0, 0)
2045 # define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1)
2046 # endif
2047 # endif
2048 # ifdef DARWIN
2049 # define OS_TYPE "DARWIN"
2050 # define DARWIN_DONT_PARSE_STACK
2051 # define DYNAMIC_LOADING
2052 /* XXX: see get_end(3), get_etext() and get_end() should not be used.
2053 These aren't used when dyld support is enabled (it is by default) */
2054 # define DATASTART ((ptr_t) get_etext())
2055 # define DATAEND ((ptr_t) get_end())
2056 # ifdef HAVE_PTHREAD_GET_STACKADDR_NP
2057 # define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self())
2058 # else
2059 # define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
2060 # endif
2061 # define USE_MMAP
2062 # define USE_MMAP_ANON
2063 # ifdef GC_DARWIN_THREADS
2064 # define MPROTECT_VDB
2065 # endif
2066 # include <unistd.h>
2067 # define GETPAGESIZE() getpagesize()
2068 /* There seems to be some issues with trylock hanging on darwin. This
2069 should be looked into some more */
2070 # define NO_PTHREAD_TRYLOCK
2071 # endif
2072 # ifdef FREEBSD
2073 # define OS_TYPE "FREEBSD"
2074 # ifndef GC_FREEBSD_THREADS
2075 # define MPROTECT_VDB
2076 # endif
2077 # ifdef __GLIBC__
2078 # define SIG_SUSPEND (32+6)
2079 # define SIG_THR_RESTART (32+5)
2080 extern int _end[];
2081 # define DATAEND (_end)
2082 # else
2083 # define SIG_SUSPEND SIGUSR1
2084 # define SIG_THR_RESTART SIGUSR2
2085 # endif
2086 # define FREEBSD_STACKBOTTOM
2087 # ifdef __ELF__
2088 # define DYNAMIC_LOADING
2089 # endif
2090 extern char etext[];
2091 extern char * GC_FreeBSDGetDataStart();
2092 # define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
2093 # endif
2094 # ifdef NETBSD
2095 # define OS_TYPE "NETBSD"
2096 # ifdef __ELF__
2097 # define DYNAMIC_LOADING
2098 # endif
2099 # define HEURISTIC2
2100 extern char etext[];
2101 # define SEARCH_FOR_DATA_START
2102 # endif
2103 # ifdef SUNOS5
2104 # define ELF_CLASS ELFCLASS64
2105 # define OS_TYPE "SUNOS5"
2106 extern int _etext[], _end[];
2107 extern ptr_t GC_SysVGetDataStart();
2108 # define DATASTART GC_SysVGetDataStart(0x1000, _etext)
2109 # define DATAEND (_end)
2110 /* # define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7, */
2111 /* but reportedly breaks under 2.8. It appears that the stack */
2112 /* base is a property of the executable, so this should not break */
2113 /* old executables. */
2114 /* HEURISTIC2 probably works, but this appears to be preferable. */
2115 /* # include <sys/vm.h> */
2116 /* # define STACKBOTTOM USRSTACK */
2117 # define HEURISTIC2
2118 # define PROC_VDB
2119 # define DYNAMIC_LOADING
2120 # if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
2121 # define USE_MMAP
2122 /* Otherwise we now use calloc. Mmap may result in the */
2123 /* heap interleaved with thread stacks, which can result in */
2124 /* excessive blacklisting. Sbrk is unusable since it */
2125 /* doesn't interact correctly with the system malloc. */
2126 # endif
2127 # ifdef USE_MMAP
2128 # define HEAP_START (ptr_t)0x40000000
2129 # else
2130 # define HEAP_START DATAEND
2131 # endif
2132 # endif
2133 # endif
2134
2135 #if defined(LINUX) && defined(USE_MMAP)
2136 /* The kernel may do a somewhat better job merging mappings etc. */
2137 /* with anonymous mappings. */
2138 # define USE_MMAP_ANON
2139 #endif
2140
2141 #if defined(LINUX) && defined(REDIRECT_MALLOC)
2142 /* Rld appears to allocate some memory with its own allocator, and */
2143 /* some through malloc, which might be redirected. To make this */
2144 /* work with collectable memory, we have to scan memory allocated */
2145 /* by rld's internal malloc. */
2146 # define USE_PROC_FOR_LIBRARIES
2147 #endif
2148
2149 # ifndef STACK_GROWS_UP
2150 # define STACK_GROWS_DOWN
2151 # endif
2152
2153 # ifndef CPP_WORDSZ
2154 # define CPP_WORDSZ 32
2155 # endif
2156
2157 # ifndef OS_TYPE
2158 # define OS_TYPE ""
2159 # endif
2160
2161 # ifndef DATAEND
2162 extern int end[];
2163 # define DATAEND (end)
2164 # endif
2165
2166 # if defined(SVR4) && !defined(GETPAGESIZE)
2167 # include <unistd.h>
2168 # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
2169 # endif
2170
2171 # ifndef GETPAGESIZE
2172 # if defined(SUNOS5) || defined(IRIX5)
2173 # include <unistd.h>
2174 # endif
2175 # define GETPAGESIZE() getpagesize()
2176 # endif
2177
2178 # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
2179 /* OS has SVR4 generic features. Probably others also qualify. */
2180 # define SVR4
2181 # endif
2182
2183 # if defined(SUNOS5) || defined(DRSNX)
2184 /* OS has SUNOS5 style semi-undocumented interface to dynamic */
2185 /* loader. */
2186 # define SUNOS5DL
2187 /* OS has SUNOS5 style signal handlers. */
2188 # define SUNOS5SIGS
2189 # endif
2190
2191 # if defined(HPUX)
2192 # define SUNOS5SIGS
2193 # endif
2194
2195 # if defined(FREEBSD) && ((__FreeBSD__ >= 4) || (__FreeBSD_kernel__ >= 4))
2196 # define SUNOS5SIGS
2197 # endif
2198
2199 # if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \
2200 || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
2201 || defined(DGUX) || defined(BSD) || defined(SUNOS4) \
2202 || defined(_AIX) || defined(DARWIN) || defined(OSF1) \
2203 || defined(HURD)
2204 # define UNIX_LIKE /* Basic Unix-like system calls work. */
2205 # endif
2206
2207 # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
2208 -> bad word size
2209 # endif
2210
2211 # ifdef PCR
2212 # undef DYNAMIC_LOADING
2213 # undef STACKBOTTOM
2214 # undef HEURISTIC1
2215 # undef HEURISTIC2
2216 # undef PROC_VDB
2217 # undef MPROTECT_VDB
2218 # define PCR_VDB
2219 # endif
2220
2221 # ifdef SRC_M3
2222 /* Postponed for now. */
2223 # undef PROC_VDB
2224 # undef MPROTECT_VDB
2225 # endif
2226
2227 # ifdef SMALL_CONFIG
2228 /* Presumably not worth the space it takes. */
2229 # undef PROC_VDB
2230 # undef MPROTECT_VDB
2231 # endif
2232
2233 # ifdef USE_MUNMAP
2234 # undef MPROTECT_VDB /* Can't deal with address space holes. */
2235 # endif
2236
2237 # ifdef PARALLEL_MARK
2238 # undef MPROTECT_VDB /* For now. */
2239 # endif
2240
2241 # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
2242 # define DEFAULT_VDB
2243 # endif
2244
2245 # ifndef PREFETCH
2246 # define PREFETCH(x)
2247 # define NO_PREFETCH
2248 # endif
2249
2250 # ifndef PREFETCH_FOR_WRITE
2251 # define PREFETCH_FOR_WRITE(x)
2252 # define NO_PREFETCH_FOR_WRITE
2253 # endif
2254
2255 # ifndef CACHE_LINE_SIZE
2256 # define CACHE_LINE_SIZE 32 /* Wild guess */
2257 # endif
2258
2259 # if defined(LINUX) || defined(HURD) || defined(__GLIBC__)
2260 # define REGISTER_LIBRARIES_EARLY
2261 /* We sometimes use dl_iterate_phdr, which may acquire an internal */
2262 /* lock. This isn't safe after the world has stopped. So we must */
2263 /* call GC_register_dynamic_libraries before stopping the world. */
2264 /* For performance reasons, this may be beneficial on other */
2265 /* platforms as well, though it should be avoided in win32. */
2266 # endif /* LINUX */
2267
2268 # if defined(SEARCH_FOR_DATA_START)
2269 extern ptr_t GC_data_start;
2270 # define DATASTART GC_data_start
2271 # endif
2272
2273 # ifndef CLEAR_DOUBLE
2274 # define CLEAR_DOUBLE(x) \
2275 ((word*)x)[0] = 0; \
2276 ((word*)x)[1] = 0;
2277 # endif /* CLEAR_DOUBLE */
2278
2279 # if defined(GC_IRIX_THREADS) && !defined(IRIX5)
2280 --> inconsistent configuration
2281 # endif
2282 # if defined(GC_LINUX_THREADS) && !defined(LINUX)
2283 --> inconsistent configuration
2284 # endif
2285 # if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)
2286 --> inconsistent configuration
2287 # endif
2288 # if defined(GC_HPUX_THREADS) && !defined(HPUX)
2289 --> inconsistent configuration
2290 # endif
2291 # if defined(GC_AIX_THREADS) && !defined(_AIX)
2292 --> inconsistent configuration
2293 # endif
2294 # if defined(GC_GNU_THREADS) && !defined(HURD)
2295 --> inconsistent configuration
2296 # endif
2297 # if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32)
2298 --> inconsistent configuration
2299 # endif
2300
2301 # if defined(PCR) || defined(SRC_M3) || \
2302 defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \
2303 defined(GC_PTHREADS)
2304 # define THREADS
2305 # endif
2306
2307 # if defined(HP_PA) || defined(M88K) \
2308 || defined(POWERPC) && !defined(DARWIN) \
2309 || defined(LINT) || defined(MSWINCE) || defined(ARM32) || defined(CRIS) \
2310 || (defined(I386) && defined(__LCC__))
2311 /* Use setjmp based hack to mark from callee-save registers. */
2312 /* The define should move to the individual platform */
2313 /* descriptions. */
2314 # define USE_GENERIC_PUSH_REGS
2315 # endif
2316
2317 # if defined(MSWINCE)
2318 # define NO_GETENV
2319 # endif
2320
2321 # if defined(SPARC)
2322 # define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
2323 /* include assembly code to do it well. */
2324 # endif
2325
2326 /* Can we save call chain in objects for debugging? */
2327 /* SET NFRAMES (# of saved frames) and NARGS (#of args for each */
2328 /* frame) to reasonable values for the platform. */
2329 /* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified */
2330 /* at build time, though we feel free to adjust it slightly. */
2331 /* Define NEED_CALLINFO if we either save the call stack or */
2332 /* GC_ADD_CALLER is defined. */
2333 /* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */
2334
2335 #if defined(SPARC)
2336 # define CAN_SAVE_CALL_ARGS
2337 #endif
2338 #if (defined(I386) || defined(X86_64)) && (defined(LINUX) || defined(__GLIBC__))
2339 /* SAVE_CALL_CHAIN is supported if the code is compiled to save */
2340 /* frame pointers by default, i.e. no -fomit-frame-pointer flag. */
2341 # define CAN_SAVE_CALL_ARGS
2342 #endif
2343
2344 # if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \
2345 && defined(GC_CAN_SAVE_CALL_STACKS)
2346 # define SAVE_CALL_CHAIN
2347 # endif
2348 # ifdef SAVE_CALL_CHAIN
2349 # if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)
2350 # define NARGS SAVE_CALL_NARGS
2351 # else
2352 # define NARGS 0 /* Number of arguments to save for each call. */
2353 # endif
2354 # endif
2355 # ifdef SAVE_CALL_CHAIN
2356 # ifndef SAVE_CALL_COUNT
2357 # define NFRAMES 6 /* Number of frames to save. Even for */
2358 /* alignment reasons. */
2359 # else
2360 # define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)
2361 # endif
2362 # define NEED_CALLINFO
2363 # endif /* SAVE_CALL_CHAIN */
2364 # ifdef GC_ADD_CALLER
2365 # define NFRAMES 1
2366 # define NARGS 0
2367 # define NEED_CALLINFO
2368 # endif
2369
2370 # if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)
2371 # define DBG_HDRS_ALL
2372 # endif
2373
2374 # if defined(POINTER_MASK) && !defined(POINTER_SHIFT)
2375 # define POINTER_SHIFT 0
2376 # endif
2377
2378 # if defined(POINTER_SHIFT) && !defined(POINTER_MASK)
2379 # define POINTER_MASK ((GC_word)(-1))
2380 # endif
2381
2382 # if !defined(FIXUP_POINTER) && defined(POINTER_MASK)
2383 # define FIXUP_POINTER(p) (p) = ((p) & (POINTER_MASK) << POINTER_SHIFT)
2384 # endif
2385
2386 # if defined(FIXUP_POINTER)
2387 # define NEED_FIXUP_POINTER 1
2388 # else
2389 # define NEED_FIXUP_POINTER 0
2390 # define FIXUP_POINTER(p)
2391 # endif
2392
2393 #ifdef GC_PRIVATE_H
2394 /* This relies on some type definitions from gc_priv.h, from */
2395 /* where it's normally included. */
2396 /* */
2397 /* How to get heap memory from the OS: */
2398 /* Note that sbrk()-like allocation is preferred, since it */
2399 /* usually makes it possible to merge consecutively allocated */
2400 /* chunks. It also avoids unintented recursion with */
2401 /* -DREDIRECT_MALLOC. */
2402 /* GET_MEM() returns a HLKSIZE aligned chunk. */
2403 /* 0 is taken to mean failure. */
2404 /* In the case os USE_MMAP, the argument must also be a */
2405 /* physical page size. */
2406 /* GET_MEM is currently not assumed to retrieve 0 filled space, */
2407 /* though we should perhaps take advantage of the case in which */
2408 /* does. */
2409 struct hblk; /* See gc_priv.h. */
2410 # ifdef PCR
2411 char * real_malloc();
2412 # define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \
2413 + GC_page_size-1)
2414 # else
2415 # ifdef OS2
2416 void * os2_alloc(size_t bytes);
2417 # define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \
2418 + GC_page_size) \
2419 + GC_page_size-1)
2420 # else
2421 # if defined(NEXT) || defined(DOS4GW) || \
2422 (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \
2423 (defined(SUNOS5) && !defined(USE_MMAP))
2424 # define GET_MEM(bytes) HBLKPTR((size_t) \
2425 calloc(1, (size_t)bytes + GC_page_size) \
2426 + GC_page_size-1)
2427 # else
2428 # if defined(MSWIN32) || defined(CYGWIN32)
2429 extern ptr_t GC_win32_get_mem();
2430 # define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
2431 # else
2432 # ifdef MACOS
2433 # if defined(USE_TEMPORARY_MEMORY)
2434 extern Ptr GC_MacTemporaryNewPtr(size_t size,
2435 Boolean clearMemory);
2436 # define GET_MEM(bytes) HBLKPTR( \
2437 GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \
2438 + GC_page_size-1)
2439 # else
2440 # define GET_MEM(bytes) HBLKPTR( \
2441 NewPtrClear(bytes + GC_page_size) + GC_page_size-1)
2442 # endif
2443 # else
2444 # ifdef MSWINCE
2445 extern ptr_t GC_wince_get_mem();
2446 # define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
2447 # else
2448 # if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
2449 extern void *GC_amiga_get_mem(size_t size);
2450 # define GET_MEM(bytes) HBLKPTR((size_t) \
2451 GC_amiga_get_mem((size_t)bytes + GC_page_size) \
2452 + GC_page_size-1)
2453 # else
2454 extern ptr_t GC_unix_get_mem();
2455 # define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
2456 # endif
2457 # endif
2458 # endif
2459 # endif
2460 # endif
2461 # endif
2462 # endif
2463
2464 #endif /* GC_PRIVATE_H */
2465
2466 #if defined(_AIX) && !defined(__GNUC__) && !defined(__STDC__)
2467 /* IBMs xlc compiler doesn't appear to follow the convention of */
2468 /* defining __STDC__ to be zero in extended mode. */
2469 # define __STDC__ 0
2470 #endif
2471
2472 # endif /* GCCONFIG_H */
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