Annotation of OpenXM_contrib2/asir2000/gc5.3/gcconfig.h.linux, Revision 1.4
1.1 noro 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(LINUX)
73: # if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
74: # define ULTRIX
75: # else
76: # if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
77: || defined(__SYSTYPE_SVR4__)
78: # define IRIX5 /* or IRIX 6.X */
79: # else
80: # define RISCOS /* or IRIX 4.X */
81: # endif
82: # endif
83: # endif /* !LINUX */
84: # define mach_type_known
85: # endif
86: # if defined(sequent) && defined(i386)
87: # define I386
88: # define SEQUENT
89: # define mach_type_known
90: # endif
91: # if defined(sun) && defined(i386)
92: # define I386
93: # define SUNOS5
94: # define mach_type_known
95: # endif
96: # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
97: # define I386
98: # define OS2
99: # define mach_type_known
100: # endif
101: # if defined(ibm032)
102: # define RT
103: # define mach_type_known
104: # endif
105: # if defined(sun) && (defined(sparc) || defined(__sparc))
106: # define SPARC
107: /* Test for SunOS 5.x */
108: # include <errno.h>
109: # ifdef ECHRNG
110: # define SUNOS5
111: # else
112: # define SUNOS4
113: # endif
114: # define mach_type_known
115: # endif
116: # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
117: && !defined(__OpenBSD__)
118: # define SPARC
119: # define DRSNX
120: # define mach_type_known
121: # endif
122: # if defined(_IBMR2)
123: # define RS6000
124: # define mach_type_known
125: # endif
126: # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
127: /* The above test may need refinement */
128: # define I386
129: # if defined(_SCO_ELF)
130: # define SCO_ELF
131: # else
132: # define SCO
133: # endif
134: # define mach_type_known
135: # endif
136: # if defined(_AUX_SOURCE)
137: # define M68K
138: # define SYSV
139: # define mach_type_known
140: # endif
141: # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
142: || defined(hppa) || defined(__hppa__)
143: # define HP_PA
144: # ifndef LINUX
145: # define HPUX
146: # endif
147: # define mach_type_known
148: # endif
149: # if defined(LINUX) && (defined(i386) || defined(__i386__))
150: # define I386
151: # define mach_type_known
152: # endif
153: # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
154: # define IA64
155: # define mach_type_known
156: # endif
157: # if defined(LINUX) && defined(powerpc)
158: # define POWERPC
159: # define mach_type_known
160: # endif
161: # if defined(LINUX) && defined(__mc68000__)
162: # define M68K
163: # define mach_type_known
164: # endif
165: # if defined(LINUX) && (defined(sparc) || defined(__sparc__))
166: # define SPARC
167: # define mach_type_known
168: # endif
169: # if defined(LINUX) && defined(arm)
170: # define ARM32
171: # define mach_type_known
172: # endif
173: # if defined(__alpha) || defined(__alpha__)
174: # define ALPHA
175: # if !defined(LINUX)
176: # define OSF1 /* a.k.a Digital Unix */
177: # endif
178: # define mach_type_known
179: # endif
180: # if defined(_AMIGA) && !defined(AMIGA)
181: # define AMIGA
182: # endif
183: # ifdef AMIGA
184: # define M68K
185: # define mach_type_known
186: # endif
187: # if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
188: # define M68K
189: # define MACOS
190: # define mach_type_known
191: # endif
192: # if defined(__MWERKS__) && defined(__powerc)
193: # define POWERPC
194: # define MACOS
195: # define mach_type_known
196: # endif
197: # if defined(macosx)
198: # define MACOSX
199: # define POWERPC
200: # define mach_type_known
201: # endif
202: # if defined(NeXT) && defined(mc68000)
203: # define M68K
204: # define NEXT
205: # define mach_type_known
206: # endif
207: # if defined(NeXT) && defined(i386)
208: # define I386
209: # define NEXT
210: # define mach_type_known
211: # endif
212: # if defined(__OpenBSD__) && defined(i386)
213: # define I386
214: # define OPENBSD
215: # define mach_type_known
216: # endif
217: # if defined(__FreeBSD__) && defined(i386)
218: # define I386
219: # define FREEBSD
220: # define mach_type_known
221: # endif
222: # if defined(__NetBSD__) && defined(i386)
223: # define I386
224: # define NETBSD
225: # define mach_type_known
226: # endif
227: # if defined(bsdi) && defined(i386)
228: # define I386
229: # define BSDI
230: # define mach_type_known
231: # endif
232: # if !defined(mach_type_known) && defined(__386BSD__)
233: # define I386
234: # define THREE86BSD
235: # define mach_type_known
236: # endif
237: # if defined(_CX_UX) && defined(_M88K)
238: # define M88K
239: # define CX_UX
240: # define mach_type_known
241: # endif
242: # if defined(DGUX)
243: # define M88K
244: /* DGUX defined */
245: # define mach_type_known
246: # endif
247: # if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
248: || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
249: # define I386
250: # define MSWIN32 /* or Win32s */
251: # define mach_type_known
252: # endif
253: # if defined(__DJGPP__)
254: # define I386
255: # ifndef DJGPP
256: # define DJGPP /* MSDOS running the DJGPP port of GCC */
257: # endif
258: # define mach_type_known
259: # endif
260: # if defined(__CYGWIN32__) || defined(__CYGWIN__)
261: # define I386
262: # define CYGWIN32
263: # define mach_type_known
264: # endif
265: # if defined(__MINGW32__)
266: # define I386
267: # define MSWIN32
268: # define mach_type_known
269: # endif
270: # if defined(__BORLANDC__)
271: # define I386
272: # define MSWIN32
273: # define mach_type_known
274: # endif
275: # if defined(_UTS) && !defined(mach_type_known)
276: # define S370
277: # define UTS4
278: # define mach_type_known
279: # endif
280: # if defined(__pj__)
281: # define PJ
282: # define mach_type_known
283: # endif
284: /* Ivan Demakov */
285: # if defined(__WATCOMC__) && defined(__386__)
286: # define I386
287: # if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
288: # if defined(__OS2__)
289: # define OS2
290: # else
291: # if defined(__WINDOWS_386__) || defined(__NT__)
292: # define MSWIN32
293: # else
294: # define DOS4GW
295: # endif
296: # endif
297: # endif
298: # define mach_type_known
299: # endif
300:
301: /* Feel free to add more clauses here */
302:
303: /* Or manually define the machine type here. A machine type is */
304: /* characterized by the architecture. Some */
305: /* machine types are further subdivided by OS. */
306: /* the macros ULTRIX, RISCOS, and BSD to distinguish. */
307: /* Note that SGI IRIX is treated identically to RISCOS. */
308: /* SYSV on an M68K actually means A/UX. */
309: /* The distinction in these cases is usually the stack starting address */
310: # ifndef mach_type_known
311: --> unknown machine type
312: # endif
313: /* Mapping is: M68K ==> Motorola 680X0 */
314: /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
315: /* MACOS and AMIGA variants) */
316: /* I386 ==> Intel 386 */
317: /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
318: /* FREEBSD, THREE86BSD, MSWIN32, */
319: /* BSDI,SUNOS5, NEXT, other variants) */
320: /* NS32K ==> Encore Multimax */
321: /* MIPS ==> R2000 or R3000 */
322: /* (RISCOS, ULTRIX variants) */
323: /* VAX ==> DEC VAX */
324: /* (BSD, ULTRIX variants) */
325: /* RS6000 ==> IBM RS/6000 AIX3.X */
326: /* RT ==> IBM PC/RT */
327: /* HP_PA ==> HP9000/700 & /800 */
328: /* HP/UX */
329: /* SPARC ==> SPARC under SunOS */
330: /* (SUNOS4, SUNOS5, */
331: /* DRSNX variants) */
332: /* ALPHA ==> DEC Alpha */
333: /* (OSF1 and LINUX variants) */
334: /* M88K ==> Motorola 88XX0 */
335: /* (CX_UX and DGUX) */
336: /* S370 ==> 370-like machine */
337: /* running Amdahl UTS4 */
338: /* ARM32 ==> Intel StrongARM */
339: /* IA64 ==> Intel IA64 */
340: /* (e.g. Itanium) */
341:
342:
343: /*
344: * For each architecture and OS, the following need to be defined:
345: *
346: * CPP_WORD_SZ is a simple integer constant representing the word size.
347: * in bits. We assume byte addressibility, where a byte has 8 bits.
348: * We also assume CPP_WORD_SZ is either 32 or 64.
349: * (We care about the length of pointers, not hardware
350: * bus widths. Thus a 64 bit processor with a C compiler that uses
351: * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
352: *
353: * MACH_TYPE is a string representation of the machine type.
354: * OS_TYPE is analogous for the OS.
355: *
356: * ALIGNMENT is the largest N, such that
357: * all pointer are guaranteed to be aligned on N byte boundaries.
358: * defining it to be 1 will always work, but perform poorly.
359: *
360: * DATASTART is the beginning of the data segment.
361: * On UNIX systems, the collector will scan the area between DATASTART
362: * and DATAEND for root pointers.
363: *
364: * DATAEND, if not &end.
365: *
366: * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
367: * the pointer size.
368: *
369: * STACKBOTTOM is the cool end of the stack, which is usually the
370: * highest address in the stack.
371: * Under PCR or OS/2, we have other ways of finding thread stacks.
372: * For each machine, the following should:
373: * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
374: * 2) define exactly one of
375: * STACKBOTTOM (should be defined to be an expression)
376: * HEURISTIC1
377: * HEURISTIC2
378: * If either of the last two macros are defined, then STACKBOTTOM is computed
379: * during collector startup using one of the following two heuristics:
380: * HEURISTIC1: Take an address inside GC_init's frame, and round it up to
381: * the next multiple of STACK_GRAN.
382: * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
383: * in small steps (decrement if STACK_GROWS_UP), and read the value
384: * at each location. Remember the value when the first
385: * Segmentation violation or Bus error is signalled. Round that
386: * to the nearest plausible page boundary, and use that instead
387: * of STACKBOTTOM.
388: *
389: * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
390: * the value of environ is a pointer that can serve as STACKBOTTOM.
391: * I expect that HEURISTIC2 can be replaced by this approach, which
392: * interferes far less with debugging.
393: *
394: * If no expression for STACKBOTTOM can be found, and neither of the above
395: * heuristics are usable, the collector can still be used with all of the above
396: * undefined, provided one of the following is done:
397: * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
398: * without reference to STACKBOTTOM. This is appropriate for use in
399: * conjunction with thread packages, since there will be multiple stacks.
400: * (Allocating thread stacks in the heap, and treating them as ordinary
401: * heap data objects is also possible as a last resort. However, this is
402: * likely to introduce significant amounts of excess storage retention
403: * unless the dead parts of the thread stacks are periodically cleared.)
404: * 2) Client code may set GC_stackbottom before calling any GC_ routines.
405: * If the author of the client code controls the main program, this is
406: * easily accomplished by introducing a new main program, setting
407: * GC_stackbottom to the address of a local variable, and then calling
408: * the original main program. The new main program would read something
409: * like:
410: *
411: * # include "gc_private.h"
412: *
413: * main(argc, argv, envp)
414: * int argc;
415: * char **argv, **envp;
416: * {
417: * int dummy;
418: *
419: * GC_stackbottom = (ptr_t)(&dummy);
420: * return(real_main(argc, argv, envp));
421: * }
422: *
423: *
424: * Each architecture may also define the style of virtual dirty bit
425: * implementation to be used:
426: * MPROTECT_VDB: Write protect the heap and catch faults.
427: * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
428: *
429: * An architecture may define DYNAMIC_LOADING if dynamic_load.c
430: * defined GC_register_dynamic_libraries() for the architecture.
431: *
432: * An architecture may define PREFETCH(x) to preload the cache with *x.
433: * This defaults to a no-op.
434: *
435: * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
436: *
437: * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
438: * clear the two words at GC_malloc-aligned address x. By default,
439: * word stores of 0 are used instead.
440: */
441:
442:
443: # define STACK_GRAN 0x1000000
444: # ifdef M68K
445: # define MACH_TYPE "M68K"
446: # define ALIGNMENT 2
447: # ifdef OPENBSD
448: # define OS_TYPE "OPENBSD"
449: # define HEURISTIC2
450: extern char etext;
451: # define DATASTART ((ptr_t)(&etext))
452: # endif
453: # ifdef NETBSD
454: # define OS_TYPE "NETBSD"
455: # define HEURISTIC2
456: extern char etext;
457: # define DATASTART ((ptr_t)(&etext))
458: # endif
459: # ifdef LINUX
460: # define OS_TYPE "LINUX"
461: # define STACKBOTTOM ((ptr_t)0xf0000000)
462: # define MPROTECT_VDB
463: # ifdef __ELF__
464: # define DYNAMIC_LOADING
465: extern char **__environ;
466: # define DATASTART ((ptr_t)(&__environ))
467: /* hideous kludge: __environ is the first */
468: /* word in crt0.o, and delimits the start */
469: /* of the data segment, no matter which */
470: /* ld options were passed through. */
471: /* We could use _etext instead, but that */
472: /* would include .rodata, which may */
473: /* contain large read-only data tables */
474: /* that we'd rather not scan. */
475: extern int _end;
476: # define DATAEND (&_end)
477: # else
478: extern int etext;
479: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
480: # endif
481: # endif
482: # ifdef SUNOS4
483: # define OS_TYPE "SUNOS4"
484: extern char etext;
485: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff))
486: # define HEURISTIC1 /* differs */
487: # define DYNAMIC_LOADING
488: # endif
489: # ifdef HP
490: # define OS_TYPE "HP"
491: extern char etext;
492: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
493: # define STACKBOTTOM ((ptr_t) 0xffeffffc)
494: /* empirically determined. seems to work. */
495: # include <unistd.h>
496: # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
497: # endif
498: # ifdef SYSV
499: # define OS_TYPE "SYSV"
500: extern etext;
501: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
502: & ~0x3fffff) \
503: +((word)&etext & 0x1fff))
504: /* This only works for shared-text binaries with magic number 0413.
505: The other sorts of SysV binaries put the data at the end of the text,
506: in which case the default of &etext would work. Unfortunately,
507: handling both would require having the magic-number available.
508: -- Parag
509: */
510: # define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
511: /* The stack starts at the top of memory, but */
512: /* 0x0 cannot be used as setjump_test complains */
513: /* that the stack direction is incorrect. Two */
514: /* bytes down from 0x0 should be safe enough. */
515: /* --Parag */
516: # include <sys/mmu.h>
517: # define GETPAGESIZE() PAGESIZE /* Is this still right? */
518: # endif
519: # ifdef AMIGA
520: # define OS_TYPE "AMIGA"
521: /* STACKBOTTOM and DATASTART handled specially */
522: /* in os_dep.c */
523: # define DATAEND /* not needed */
524: # define GETPAGESIZE() 4096
525: # endif
526: # ifdef MACOS
527: # ifndef __LOWMEM__
528: # include <LowMem.h>
529: # endif
530: # define OS_TYPE "MACOS"
531: /* see os_dep.c for details of global data segments. */
532: # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
533: # define DATAEND /* not needed */
534: # define GETPAGESIZE() 4096
535: # endif
536: # ifdef NEXT
537: # define OS_TYPE "NEXT"
538: # define DATASTART ((ptr_t) get_etext())
539: # define STACKBOTTOM ((ptr_t) 0x4000000)
540: # define DATAEND /* not needed */
541: # endif
542: # endif
543:
544: # ifdef POWERPC
545: # define MACH_TYPE "POWERPC"
546: # ifdef MACOS
547: # define ALIGNMENT 2 /* Still necessary? Could it be 4? */
548: # ifndef __LOWMEM__
549: # include <LowMem.h>
550: # endif
551: # define OS_TYPE "MACOS"
552: /* see os_dep.c for details of global data segments. */
553: # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
554: # define DATAEND /* not needed */
555: # endif
556: # ifdef LINUX
557: # define ALIGNMENT 4 /* Guess. Can someone verify? */
558: /* This was 2, but that didn't sound right. */
559: # define OS_TYPE "LINUX"
560: # define HEURISTIC1
561: # define DYNAMIC_LOADING
562: # undef STACK_GRAN
563: # define STACK_GRAN 0x10000000
564: /* Stack usually starts at 0x80000000 */
565: # define LINUX_DATA_START
566: extern int _end;
567: # define DATAEND (&_end)
568: # endif
569: # ifdef MACOSX
570: # define ALIGNMENT 4
571: # define OS_TYPE "MACOSX"
572: # define DATASTART ((ptr_t) get_etext())
573: # define STACKBOTTOM ((ptr_t) 0xc0000000)
574: # define DATAEND /* not needed */
575: # endif
576: # endif
577:
578: # ifdef VAX
579: # define MACH_TYPE "VAX"
580: # define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
581: extern char etext;
582: # define DATASTART ((ptr_t)(&etext))
583: # ifdef BSD
584: # define OS_TYPE "BSD"
585: # define HEURISTIC1
586: /* HEURISTIC2 may be OK, but it's hard to test. */
587: # endif
588: # ifdef ULTRIX
589: # define OS_TYPE "ULTRIX"
590: # define STACKBOTTOM ((ptr_t) 0x7fffc800)
591: # endif
592: # endif
593:
594: # ifdef RT
595: # define MACH_TYPE "RT"
596: # define ALIGNMENT 4
597: # define DATASTART ((ptr_t) 0x10000000)
598: # define STACKBOTTOM ((ptr_t) 0x1fffd800)
599: # endif
600:
601: # ifdef SPARC
602: # define MACH_TYPE "SPARC"
603: # define ALIGNMENT 4 /* Required by hardware */
604: # define ALIGN_DOUBLE
605: extern int etext;
606: # ifdef SUNOS5
607: # define OS_TYPE "SUNOS5"
608: extern int _etext;
609: extern int _end;
610: extern char * GC_SysVGetDataStart();
611: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
612: # define DATAEND (&_end)
613: # ifndef USE_MMAP
614: # define USE_MMAP
615: # endif
616: # ifdef USE_MMAP
617: # define HEAP_START (ptr_t)0x40000000
618: # else
619: # define HEAP_START DATAEND
620: # endif
621: # define PROC_VDB
622: /* HEURISTIC1 reportedly no longer works under 2.7. Thus we */
623: /* switched to HEURISTIC2, eventhough it creates some debugging */
624: /* issues. */
1.4 ! noro 625: #if MPI
1.1 noro 626: extern int *StackBottom;
627: # define STACKBOTTOM (ptr_t)(StackBottom)
628: #else
629: # define HEURISTIC2
630: #endif
631: # include <unistd.h>
632: # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
633: /* getpagesize() appeared to be missing from at least one */
634: /* Solaris 5.4 installation. Weird. */
635: # define DYNAMIC_LOADING
636: # endif
637: # ifdef SUNOS4
638: # define OS_TYPE "SUNOS4"
639: /* [If you have a weak stomach, don't read this.] */
640: /* We would like to use: */
641: /* # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */
642: /* This fails occasionally, due to an ancient, but very */
643: /* persistent ld bug. &etext is set 32 bytes too high. */
644: /* We instead read the text segment size from the a.out */
645: /* header, which happens to be mapped into our address space */
646: /* at the start of the text segment. The detective work here */
647: /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
648: /* Serpette of INRIA. */
649: /* This assumes ZMAGIC, i.e. demand-loadable executables. */
650: # define TEXTSTART 0x2000
651: # define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
652: # define MPROTECT_VDB
653: # define HEURISTIC1
654: # define DYNAMIC_LOADING
655: # endif
656: # ifdef DRSNX
657: # define CPP_WORDSZ 32
658: # define OS_TYPE "DRSNX"
659: extern char * GC_SysVGetDataStart();
660: extern int etext;
661: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
662: # define MPROTECT_VDB
663: # define STACKBOTTOM ((ptr_t) 0xdfff0000)
664: # define DYNAMIC_LOADING
665: # endif
666: # ifdef LINUX
667: # define OS_TYPE "LINUX"
668: # ifdef __ELF__
669: # define LINUX_DATA_START
670: # define DYNAMIC_LOADING
671: # else
672: Linux Sparc non elf ?
673: # endif
674: extern int _end;
675: # define DATAEND (&_end)
676: # define SVR4
677: # define STACKBOTTOM ((ptr_t) 0xf0000000)
678: # endif
679: # ifdef OPENBSD
680: # define OS_TYPE "OPENBSD"
681: # define STACKBOTTOM ((ptr_t) 0xf8000000)
682: # define DATASTART ((ptr_t)(&etext))
683: # endif
684: # endif
685:
686: # ifdef I386
687: # define MACH_TYPE "I386"
688: # define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers */
689: /* except Borland. The -a4 option fixes */
690: /* Borland. */
691: /* Ivan Demakov: For Watcom the option is -zp4. */
692: # ifndef SMALL_CONFIG
693: # define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
694: /* improvement on Pentiums. */
695: # endif
696: # ifdef SEQUENT
697: # define OS_TYPE "SEQUENT"
698: extern int etext;
699: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
700: # define STACKBOTTOM ((ptr_t) 0x3ffff000)
701: # endif
702: # ifdef SUNOS5
703: # define OS_TYPE "SUNOS5"
704: extern int etext, _start;
705: extern char * GC_SysVGetDataStart();
706: # define DATASTART GC_SysVGetDataStart(0x1000, &etext)
707: # define STACKBOTTOM ((ptr_t)(&_start))
708: /** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
709: /*# define PROC_VDB*/
710: # define DYNAMIC_LOADING
711: # ifndef USE_MMAP
712: # define USE_MMAP
713: # endif
714: # ifdef USE_MMAP
715: # define HEAP_START (ptr_t)0x40000000
716: # else
717: # define HEAP_START DATAEND
718: # endif
719: # endif
720: # ifdef SCO
721: # define OS_TYPE "SCO"
722: extern int etext;
723: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
724: & ~0x3fffff) \
725: +((word)&etext & 0xfff))
726: # define STACKBOTTOM ((ptr_t) 0x7ffffffc)
727: # endif
728: # ifdef SCO_ELF
729: # define OS_TYPE "SCO_ELF"
730: extern int etext;
731: # define DATASTART ((ptr_t)(&etext))
732: # define STACKBOTTOM ((ptr_t) 0x08048000)
733: # define DYNAMIC_LOADING
734: # define ELF_CLASS ELFCLASS32
735: # endif
736: # ifdef LINUX
737: # define OS_TYPE "LINUX"
738: # define USE_MMAP
1.2 noro 739: # define HEAP_START 0x40000000
1.1 noro 740: # define LINUX_STACKBOTTOM
741: # if 0
742: # define HEURISTIC1
743: # undef STACK_GRAN
744: # define STACK_GRAN 0x10000000
745: /* STACKBOTTOM is usually 0xc0000000, but this changes with */
746: /* different kernel configurations. In particular, systems */
747: /* with 2GB physical memory will usually move the user */
748: /* address space limit, and hence initial SP to 0x80000000. */
749: # endif
750: # if !defined(LINUX_THREADS) || !defined(REDIRECT_MALLOC)
751: # define MPROTECT_VDB
752: # else
753: /* We seem to get random errors in incremental mode, */
754: /* possibly because Linux threads is itself a malloc client */
755: /* and can't deal with the signals. */
756: # endif
757: # ifdef __ELF__
758: # define DYNAMIC_LOADING
759: # ifdef UNDEFINED /* includes ro data */
760: extern int _etext;
761: # define DATASTART ((ptr_t)((((word) (&_etext)) + 0xfff) & ~0xfff))
762: # endif
763: # include <features.h>
764: # if defined(__GLIBC__) && __GLIBC__ >= 2
765: # define LINUX_DATA_START
766: # else
767: extern char **__environ;
768: # define DATASTART ((ptr_t)(&__environ))
769: /* hideous kludge: __environ is the first */
770: /* word in crt0.o, and delimits the start */
771: /* of the data segment, no matter which */
772: /* ld options were passed through. */
773: /* We could use _etext instead, but that */
774: /* would include .rodata, which may */
775: /* contain large read-only data tables */
776: /* that we'd rather not scan. */
777: # endif
778: extern int _end;
779: # define DATAEND (&_end)
780: # else
781: extern int etext;
782: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
783: # endif
784: # ifdef USE_I686_PREFETCH
785: # define PREFETCH(x) \
786: __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
787: /* Empirically prefetcht0 is much more effective at reducing */
788: /* cache miss stalls for the targetted load instructions. But it */
789: /* seems to interfere enough with other cache traffic that the net */
790: /* result is worse than prefetchnta. */
791: # if 0
792: /* Using prefetches for write seems to have a slight negative */
793: /* impact on performance, at least for a PIII/500. */
794: # define PREFETCH_FOR_WRITE(x) \
795: __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
796: # endif
797: # endif
798: # ifdef USE_3DNOW_PREFETCH
799: # define PREFETCH(x) \
800: __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
801: # define PREFETCH_FOR_WRITE(x)
802: __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
803: # endif
804: # endif
805: # ifdef CYGWIN32
806: # define OS_TYPE "CYGWIN32"
807: extern int _data_start__;
808: extern int _data_end__;
809: extern int _bss_start__;
810: extern int _bss_end__;
811: /* For binutils 2.9.1, we have */
812: /* DATASTART = _data_start__ */
813: /* DATAEND = _bss_end__ */
814: /* whereas for some earlier versions it was */
815: /* DATASTART = _bss_start__ */
816: /* DATAEND = _data_end__ */
817: /* To get it right for both, we take the */
818: /* minumum/maximum of the two. */
819: # define MAX(x,y) ((x) > (y) ? (x) : (y))
820: # define MIN(x,y) ((x) < (y) ? (x) : (y))
821: # define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__))
822: # define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__))
823: # undef STACK_GRAN
824: # define STACK_GRAN 0x10000
825: # define HEURISTIC1
826: # endif
827: # ifdef OS2
828: # define OS_TYPE "OS2"
829: /* STACKBOTTOM and DATASTART are handled specially in */
830: /* os_dep.c. OS2 actually has the right */
831: /* system call! */
832: # define DATAEND /* not needed */
833: # endif
834: # ifdef MSWIN32
835: # define OS_TYPE "MSWIN32"
836: /* STACKBOTTOM and DATASTART are handled specially in */
837: /* os_dep.c. */
838: # ifndef __WATCOMC__
839: # define MPROTECT_VDB
840: # endif
841: # define DATAEND /* not needed */
842: # endif
843: # ifdef DJGPP
844: # define OS_TYPE "DJGPP"
845: # include "stubinfo.h"
846: extern int etext;
847: extern int _stklen;
848: extern int __djgpp_stack_limit;
849: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff))
850: /* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
851: + _stklen)) */
852: # define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
853: /* This may not be right. */
854: # endif
855: # ifdef OPENBSD
856: # define OS_TYPE "OPENBSD"
857: # endif
858: # ifdef FREEBSD
859: # define OS_TYPE "FREEBSD"
860: # define MPROTECT_VDB
861: # endif
862: # ifdef NETBSD
863: # define OS_TYPE "NETBSD"
864: # endif
865: # ifdef THREE86BSD
866: # define OS_TYPE "THREE86BSD"
867: # endif
868: # ifdef BSDI
869: # define OS_TYPE "BSDI"
870: # endif
871: # if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) \
872: || defined(THREE86BSD) || defined(BSDI)
873: # define HEURISTIC2
874: extern char etext;
875: # define DATASTART ((ptr_t)(&etext))
876: # endif
877: # ifdef NEXT
878: # define OS_TYPE "NEXT"
879: # define DATASTART ((ptr_t) get_etext())
880: # define STACKBOTTOM ((ptr_t)0xc0000000)
881: # define DATAEND /* not needed */
882: # endif
883: # ifdef DOS4GW
884: # define OS_TYPE "DOS4GW"
885: extern long __nullarea;
886: extern char _end;
887: extern char *_STACKTOP;
888: /* Depending on calling conventions Watcom C either precedes
889: or does not precedes with undescore names of C-variables.
890: Make sure startup code variables always have the same names. */
891: #pragma aux __nullarea "*";
892: #pragma aux _end "*";
893: # define STACKBOTTOM ((ptr_t) _STACKTOP)
894: /* confused? me too. */
895: # define DATASTART ((ptr_t) &__nullarea)
896: # define DATAEND ((ptr_t) &_end)
897: # endif
898: # endif
899:
900: # ifdef NS32K
901: # define MACH_TYPE "NS32K"
902: # define ALIGNMENT 4
903: extern char **environ;
904: # define DATASTART ((ptr_t)(&environ))
905: /* hideous kludge: environ is the first */
906: /* word in crt0.o, and delimits the start */
907: /* of the data segment, no matter which */
908: /* ld options were passed through. */
909: # define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
910: # endif
911:
912: # ifdef MIPS
913: # define MACH_TYPE "MIPS"
914: /* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
915: # ifdef LINUX
916: /* This was developed for a linuxce style platform. Probably */
917: /* needs to be tweaked for workstation class machines. */
918: # define OS_TYPE "LINUX"
919: extern int __data_start;
920: # define DATASTART ((ptr_t)(&__data_start))
921: # define ALIGNMENT 4
922: # define USE_GENERIC_PUSH_REGS 1
923: # define STACKBOTTOM 0x80000000
924: /* In many cases, this should probably use LINUX_STACKBOTTOM */
925: /* instead. But some kernel versions seem to give the wrong */
926: /* value from /proc. */
927: # endif /* Linux */
928: # ifdef ULTRIX
929: # define HEURISTIC2
930: # define DATASTART (ptr_t)0x10000000
931: /* Could probably be slightly higher since */
932: /* startup code allocates lots of stuff. */
933: # define OS_TYPE "ULTRIX"
934: # define ALIGNMENT 4
935: # endif
936: # ifdef RISCOS
937: # define HEURISTIC2
938: # define DATASTART (ptr_t)0x10000000
939: # define OS_TYPE "RISCOS"
940: # define ALIGNMENT 4 /* Required by hardware */
941: # endif
942: # ifdef IRIX5
943: # define HEURISTIC2
944: extern int _fdata;
945: # define DATASTART ((ptr_t)(&_fdata))
946: # ifdef USE_MMAP
947: # define HEAP_START (ptr_t)0x30000000
948: # else
949: # define HEAP_START DATASTART
950: # endif
951: /* Lowest plausible heap address. */
952: /* In the MMAP case, we map there. */
953: /* In either case it is used to identify */
954: /* heap sections so they're not */
955: /* considered as roots. */
956: # define OS_TYPE "IRIX5"
957: # define MPROTECT_VDB
958: # ifdef _MIPS_SZPTR
959: # define CPP_WORDSZ _MIPS_SZPTR
960: # define ALIGNMENT (_MIPS_SZPTR/8)
961: # if CPP_WORDSZ != 64
962: # define ALIGN_DOUBLE
963: # endif
964: # else
965: # define ALIGNMENT 4
966: # define ALIGN_DOUBLE
967: # endif
968: # define DYNAMIC_LOADING
969: # endif
970: # endif
971:
972: # ifdef RS6000
973: # define MACH_TYPE "RS6000"
974: # define ALIGNMENT 4
975: # define DATASTART ((ptr_t)0x20000000)
976: extern int errno;
977: # define STACKBOTTOM ((ptr_t)((ulong)&errno))
978: # define DYNAMIC_LOADING
979: /* For really old versions of AIX, this may have to be removed. */
980: # endif
981:
982: # ifdef HP_PA
983: /* OS is assumed to be HP/UX */
984: # define MACH_TYPE "HP_PA"
985: # define OS_TYPE "HPUX"
986: # ifdef __LP64__
987: # define CPP_WORDSZ 64
988: # define ALIGNMENT 8
989: # else
990: # define CPP_WORDSZ 32
991: # define ALIGNMENT 4
992: # define ALIGN_DOUBLE
993: # endif
994: extern int __data_start;
995: # define DATASTART ((ptr_t)(&__data_start))
996: # if 0
997: /* The following appears to work for 7xx systems running HP/UX */
998: /* 9.xx Furthermore, it might result in much faster */
999: /* collections than HEURISTIC2, which may involve scanning */
1000: /* segments that directly precede the stack. It is not the */
1001: /* default, since it may not work on older machine/OS */
1002: /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
1003: /* this.) */
1004: # define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */
1005: # else
1006: /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
1007: /* to this. We'll probably do this on other platforms, too. */
1008: /* For now I'll use it where I can test it. */
1009: extern char ** environ;
1010: # define STACKBOTTOM ((ptr_t)environ)
1011: # endif
1012: # define STACK_GROWS_UP
1013: # define DYNAMIC_LOADING
1014: # ifndef HPUX_THREADS
1015: # define MPROTECT_VDB
1016: # endif
1017: # include <unistd.h>
1018: # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
1019: # endif
1020:
1021: # ifdef ALPHA
1022: # define MACH_TYPE "ALPHA"
1023: # define ALIGNMENT 8
1024: # define USE_GENERIC_PUSH_REGS
1025: /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
1026: /* fp registers in some cases when the target is a 21264. The assembly */
1027: /* code doesn't handle that yet, and version dependencies make that a */
1028: /* bit tricky. Do the easy thing for now. */
1029: # ifdef OSF1
1030: # define OS_TYPE "OSF1"
1031: # define DATASTART ((ptr_t) 0x140000000)
1032: extern int _end;
1033: # define DATAEND ((ptr_t) &_end)
1034: # define HEURISTIC2
1035: /* Normally HEURISTIC2 is too conervative, since */
1036: /* the text segment immediately follows the stack. */
1037: /* Hence we give an upper pound. */
1038: extern int __start;
1039: # define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1)))
1040: # define CPP_WORDSZ 64
1041: # define MPROTECT_VDB
1042: # define DYNAMIC_LOADING
1043: # endif
1044: # ifdef LINUX
1045: # define OS_TYPE "LINUX"
1046: # define CPP_WORDSZ 64
1047: # define STACKBOTTOM ((ptr_t) 0x120000000)
1048: # ifdef __ELF__
1049: # define LINUX_DATA_START
1050: # define DYNAMIC_LOADING
1051: /* This doesn't work if the collector is in a dynamic library. */
1052: # else
1053: # define DATASTART ((ptr_t) 0x140000000)
1054: # endif
1055: extern int _end;
1056: # define DATAEND (&_end)
1057: # define MPROTECT_VDB
1058: /* Has only been superficially tested. May not */
1059: /* work on all versions. */
1060: # endif
1061: # endif
1062:
1063: # ifdef IA64
1064: # define MACH_TYPE "IA64"
1065: # define ALIGN_DOUBLE
1066: /* Requires 16 byte alignment for malloc */
1067: # define ALIGNMENT 8
1068: # define USE_GENERIC_PUSH_REGS
1069: /* We need to get preserved registers in addition to register windows. */
1070: /* That's easiest to do with setjmp. */
1071: # ifdef HPUX
1072: --> needs work
1073: # endif
1074: # ifdef LINUX
1075: # define OS_TYPE "LINUX"
1076: # define CPP_WORDSZ 64
1077: /* This should really be done through /proc, but that */
1078: /* requires we run on an IA64 kernel. */
1079: # define STACKBOTTOM ((ptr_t) 0xa000000000000000l)
1080: /* We also need the base address of the register stack */
1081: /* backing store. There is probably a better way to */
1082: /* get that, too ... */
1083: # define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l)
1084: # if 1
1085: # define SEARCH_FOR_DATA_START
1086: # define DATASTART GC_data_start
1087: # else
1088: extern int data_start;
1089: # define DATASTART ((ptr_t)(&data_start))
1090: # endif
1091: # define DYNAMIC_LOADING
1092: # define MPROTECT_VDB
1093: /* Requires Linux 2.3.47 or later. */
1094: extern int _end;
1095: # define DATAEND (&_end)
1096: # define PREFETCH(x) \
1097: __asm__ (" lfetch [%0]": : "r"((void *)(x)))
1098: # define PREFETCH_FOR_WRITE(x) \
1099: __asm__ (" lfetch.excl [%0]": : "r"((void *)(x)))
1100: # define CLEAR_DOUBLE(x) \
1101: __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
1102: # endif
1103: # endif
1104:
1105: # ifdef M88K
1106: # define MACH_TYPE "M88K"
1107: # define ALIGNMENT 4
1108: # define ALIGN_DOUBLE
1109: extern int etext;
1110: # ifdef CX_UX
1111: # define OS_TYPE "CX_UX"
1112: # define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000)
1113: # endif
1114: # ifdef DGUX
1115: # define OS_TYPE "DGUX"
1116: extern char * GC_SysVGetDataStart();
1117: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
1118: # endif
1119: # define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
1120: # endif
1121:
1122: # ifdef S370
1123: # define MACH_TYPE "S370"
1124: # define OS_TYPE "UTS4"
1125: # define ALIGNMENT 4 /* Required by hardware */
1126: extern int etext;
1127: extern int _etext;
1128: extern int _end;
1129: extern char * GC_SysVGetDataStart();
1130: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
1131: # define DATAEND (&_end)
1132: # define HEURISTIC2
1133: # endif
1134:
1135: # if defined(PJ)
1136: # define ALIGNMENT 4
1137: extern int _etext;
1138: # define DATASTART ((ptr_t)(&_etext))
1139: # define HEURISTIC1
1140: # endif
1141:
1142: # ifdef ARM32
1143: # define CPP_WORDSZ 32
1144: # define MACH_TYPE "ARM32"
1145: # define ALIGNMENT 4
1146: # ifdef NETBSD
1147: # define OS_TYPE "NETBSD"
1148: # define HEURISTIC2
1149: extern char etext;
1150: # define DATASTART ((ptr_t)(&etext))
1151: # define USE_GENERIC_PUSH_REGS
1152: # endif
1153: # ifdef LINUX
1154: # define OS_TYPE "LINUX"
1155: # define HEURISTIC1
1156: # undef STACK_GRAN
1157: # define STACK_GRAN 0x10000000
1158: # define USE_GENERIC_PUSH_REGS
1159: # ifdef __ELF__
1160: # define DYNAMIC_LOADING
1161: # include <features.h>
1162: # if defined(__GLIBC__) && __GLIBC__ >= 2
1163: # define LINUX_DATA_START
1164: # else
1165: extern char **__environ;
1166: # define DATASTART ((ptr_t)(&__environ))
1167: /* hideous kludge: __environ is the first */
1168: /* word in crt0.o, and delimits the start */
1169: /* of the data segment, no matter which */
1170: /* ld options were passed through. */
1171: /* We could use _etext instead, but that */
1172: /* would include .rodata, which may */
1173: /* contain large read-only data tables */
1174: /* that we'd rather not scan. */
1175: # endif
1176: extern int _end;
1177: # define DATAEND (&_end)
1178: # else
1179: extern int etext;
1180: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
1181: # endif
1182: # endif
1183: #endif
1184:
1185: #ifdef LINUX_DATA_START
1186: /* Some Linux distributions arrange to define __data_start. Some */
1187: /* define data_start as a weak symbol. The latter is technically */
1188: /* broken, since the user program may define data_start, in which */
1189: /* case we lose. Nonetheless, we try both, prefering __data_start. */
1190: /* We assume gcc. */
1191: # pragma weak __data_start
1192: extern int __data_start;
1193: # pragma weak data_start
1194: extern int data_start;
1195: # define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start))
1196: #endif
1197:
1198: # ifndef STACK_GROWS_UP
1199: # define STACK_GROWS_DOWN
1200: # endif
1201:
1202: # ifndef CPP_WORDSZ
1203: # define CPP_WORDSZ 32
1204: # endif
1205:
1206: # ifndef OS_TYPE
1207: # define OS_TYPE ""
1208: # endif
1209:
1210: # ifndef DATAEND
1211: extern int end;
1212: # define DATAEND (&end)
1213: # endif
1214:
1215: # if defined(SVR4) && !defined(GETPAGESIZE)
1216: # include <unistd.h>
1217: # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
1218: # endif
1219:
1220: # ifndef GETPAGESIZE
1221: # if defined(SUNOS5) || defined(IRIX5)
1222: # include <unistd.h>
1223: # endif
1224: # define GETPAGESIZE() getpagesize()
1225: # endif
1226:
1227: # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
1228: /* OS has SVR4 generic features. Probably others also qualify. */
1229: # define SVR4
1230: # endif
1231:
1232: # if defined(SUNOS5) || defined(DRSNX)
1233: /* OS has SUNOS5 style semi-undocumented interface to dynamic */
1234: /* loader. */
1235: # define SUNOS5DL
1236: /* OS has SUNOS5 style signal handlers. */
1237: # define SUNOS5SIGS
1238: # endif
1239:
1240: # if defined(HPUX)
1241: # define SUNOS5SIGS
1242: # endif
1243:
1244: # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
1245: -> bad word size
1246: # endif
1247:
1248: # ifdef PCR
1249: # undef DYNAMIC_LOADING
1250: # undef STACKBOTTOM
1251: # undef HEURISTIC1
1252: # undef HEURISTIC2
1253: # undef PROC_VDB
1254: # undef MPROTECT_VDB
1255: # define PCR_VDB
1256: # endif
1257:
1258: # ifdef SRC_M3
1259: /* Postponed for now. */
1260: # undef PROC_VDB
1261: # undef MPROTECT_VDB
1262: # endif
1263:
1264: # ifdef SMALL_CONFIG
1265: /* Presumably not worth the space it takes. */
1266: # undef PROC_VDB
1267: # undef MPROTECT_VDB
1268: # endif
1269:
1270: # ifdef USE_MUNMAP
1271: # undef MPROTECT_VDB /* Can't deal with address space holes. */
1272: # endif
1273:
1274: # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
1275: # define DEFAULT_VDB
1276: # endif
1277:
1278: # ifndef PREFETCH
1279: # define PREFETCH(x)
1280: # define NO_PREFETCH
1281: # endif
1282:
1283: # ifndef PREFETCH_FOR_WRITE
1284: # define PREFETCH_FOR_WRITE(x)
1285: # define NO_PREFETCH_FOR_WRITE
1286: # endif
1287:
1288: # ifndef CACHE_LINE_SIZE
1289: # define CACHE_LINE_SIZE 32 /* Wild guess */
1290: # endif
1291:
1292: # ifndef CLEAR_DOUBLE
1293: # define CLEAR_DOUBLE(x) \
1294: ((word*)x)[0] = 0; \
1295: ((word*)x)[1] = 0;
1296: # endif /* CLEAR_DOUBLE */
1297:
1298: # if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
1299: # define SOLARIS_THREADS
1300: # endif
1301: # if defined(IRIX_THREADS) && !defined(IRIX5)
1302: --> inconsistent configuration
1303: # endif
1304: # if defined(IRIX_JDK_THREADS) && !defined(IRIX5)
1305: --> inconsistent configuration
1306: # endif
1307: # if defined(LINUX_THREADS) && !defined(LINUX)
1308: --> inconsistent configuration
1309: # endif
1310: # if defined(SOLARIS_THREADS) && !defined(SUNOS5)
1311: --> inconsistent configuration
1312: # endif
1313: # if defined(HPUX_THREADS) && !defined(HPUX)
1314: --> inconsistent configuration
1315: # endif
1316: # if defined(PCR) || defined(SRC_M3) || \
1317: defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
1318: defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
1319: defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
1320: # define THREADS
1321: # endif
1322:
1323: # if defined(HP_PA) || defined(M88K) || defined(POWERPC) \
1324: || (defined(I386) && defined(OS2)) || defined(UTS4) || defined(LINT)
1325: /* Use setjmp based hack to mark from callee-save registers. */
1326: # define USE_GENERIC_PUSH_REGS
1327: # endif
1328: # if defined(SPARC) && !defined(LINUX)
1329: # define SAVE_CALL_CHAIN
1330: # define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
1331: /* include assembly code to do it well. */
1332: # endif
1333:
1334: # endif /* GCCONFIG_H */
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