Annotation of OpenXM_contrib/gc/gcconfig.h, Revision 1.1.1.3
1.1 maekawa 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:
1.1.1.3 ! maekawa 16: #ifndef GCCONFIG_H
1.1 maekawa 17:
1.1.1.3 ! maekawa 18: # define GCCONFIG_H
1.1 maekawa 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
1.1.1.2 maekawa 46: # if defined(__OpenBSD__) && defined(__sparc__)
47: # define SPARC
48: # define OPENBSD
49: # define mach_type_known
50: # endif
1.1 maekawa 51: # if defined(__NetBSD__) && defined(m68k)
52: # define M68K
53: # define NETBSD
54: # define mach_type_known
55: # endif
1.1.1.2 maekawa 56: # if defined(__NetBSD__) && defined(arm32)
57: # define ARM32
58: # define NETBSD
59: # define mach_type_known
60: # endif
1.1 maekawa 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
1.1.1.3 ! maekawa 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 */
1.1 maekawa 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
1.1.1.2 maekawa 116: # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
117: && !defined(__OpenBSD__)
1.1 maekawa 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
1.1.1.2 maekawa 141: # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
1.1 maekawa 142: || defined(hppa) || defined(__hppa__)
143: # define HP_PA
1.1.1.2 maekawa 144: # ifndef LINUX
145: # define HPUX
146: # endif
1.1 maekawa 147: # define mach_type_known
148: # endif
1.1.1.2 maekawa 149: # if defined(LINUX) && (defined(i386) || defined(__i386__))
1.1 maekawa 150: # define I386
151: # define mach_type_known
152: # endif
1.1.1.2 maekawa 153: # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
154: # define IA64
155: # define mach_type_known
156: # endif
1.1 maekawa 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
1.1.1.3 ! maekawa 165: # if defined(LINUX) && (defined(sparc) || defined(__sparc__))
1.1 maekawa 166: # define SPARC
167: # define mach_type_known
168: # endif
1.1.1.3 ! maekawa 169: # if defined(LINUX) && defined(arm)
! 170: # define ARM32
! 171: # define mach_type_known
! 172: # endif
1.1 maekawa 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
1.1.1.2 maekawa 180: # if defined(_AMIGA) && !defined(AMIGA)
1.1 maekawa 181: # define AMIGA
1.1.1.2 maekawa 182: # endif
183: # ifdef AMIGA
184: # define M68K
1.1 maekawa 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
1.1.1.2 maekawa 197: # if defined(macosx)
198: # define MACOSX
199: # define POWERPC
200: # define mach_type_known
201: # endif
1.1 maekawa 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
1.1.1.3 ! maekawa 265: # if defined(__MINGW32__)
! 266: # define I386
! 267: # define MSWIN32
! 268: # define mach_type_known
! 269: # endif
1.1 maekawa 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
1.1.1.2 maekawa 280: # if defined(__pj__)
281: # define PJ
282: # define mach_type_known
283: # endif
1.1 maekawa 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 */
1.1.1.3 ! maekawa 338: /* ARM32 ==> Intel StrongARM */
! 339: /* IA64 ==> Intel IA64 */
! 340: /* (e.g. Itanium) */
1.1 maekawa 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: *
1.1.1.3 ! maekawa 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: *
1.1 maekawa 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.
1.1.1.3 ! maekawa 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.
1.1 maekawa 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
1.1.1.2 maekawa 547: # define ALIGNMENT 2 /* Still necessary? Could it be 4? */
1.1 maekawa 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
1.1.1.2 maekawa 557: # define ALIGNMENT 4 /* Guess. Can someone verify? */
558: /* This was 2, but that didn't sound right. */
1.1 maekawa 559: # define OS_TYPE "LINUX"
560: # define HEURISTIC1
1.1.1.3 ! maekawa 561: # define DYNAMIC_LOADING
1.1 maekawa 562: # undef STACK_GRAN
563: # define STACK_GRAN 0x10000000
1.1.1.2 maekawa 564: /* Stack usually starts at 0x80000000 */
1.1.1.3 ! maekawa 565: # define LINUX_DATA_START
1.1 maekawa 566: extern int _end;
567: # define DATAEND (&_end)
568: # endif
1.1.1.2 maekawa 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
1.1 maekawa 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. */
625: # define HEURISTIC2
626: # include <unistd.h>
627: # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
628: /* getpagesize() appeared to be missing from at least one */
629: /* Solaris 5.4 installation. Weird. */
630: # define DYNAMIC_LOADING
631: # endif
632: # ifdef SUNOS4
633: # define OS_TYPE "SUNOS4"
634: /* [If you have a weak stomach, don't read this.] */
635: /* We would like to use: */
636: /* # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */
637: /* This fails occasionally, due to an ancient, but very */
638: /* persistent ld bug. &etext is set 32 bytes too high. */
639: /* We instead read the text segment size from the a.out */
640: /* header, which happens to be mapped into our address space */
641: /* at the start of the text segment. The detective work here */
642: /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
643: /* Serpette of INRIA. */
644: /* This assumes ZMAGIC, i.e. demand-loadable executables. */
645: # define TEXTSTART 0x2000
646: # define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
647: # define MPROTECT_VDB
648: # define HEURISTIC1
649: # define DYNAMIC_LOADING
650: # endif
651: # ifdef DRSNX
652: # define CPP_WORDSZ 32
653: # define OS_TYPE "DRSNX"
654: extern char * GC_SysVGetDataStart();
655: extern int etext;
656: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
657: # define MPROTECT_VDB
658: # define STACKBOTTOM ((ptr_t) 0xdfff0000)
659: # define DYNAMIC_LOADING
660: # endif
661: # ifdef LINUX
662: # define OS_TYPE "LINUX"
663: # ifdef __ELF__
1.1.1.3 ! maekawa 664: # define LINUX_DATA_START
! 665: # define DYNAMIC_LOADING
1.1 maekawa 666: # else
667: Linux Sparc non elf ?
668: # endif
669: extern int _end;
670: # define DATAEND (&_end)
671: # define SVR4
672: # define STACKBOTTOM ((ptr_t) 0xf0000000)
673: # endif
1.1.1.2 maekawa 674: # ifdef OPENBSD
675: # define OS_TYPE "OPENBSD"
676: # define STACKBOTTOM ((ptr_t) 0xf8000000)
677: # define DATASTART ((ptr_t)(&etext))
678: # endif
1.1 maekawa 679: # endif
680:
681: # ifdef I386
682: # define MACH_TYPE "I386"
683: # define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers */
684: /* except Borland. The -a4 option fixes */
685: /* Borland. */
686: /* Ivan Demakov: For Watcom the option is -zp4. */
687: # ifndef SMALL_CONFIG
688: # define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
689: /* improvement on Pentiums. */
690: # endif
691: # ifdef SEQUENT
692: # define OS_TYPE "SEQUENT"
693: extern int etext;
694: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
695: # define STACKBOTTOM ((ptr_t) 0x3ffff000)
696: # endif
697: # ifdef SUNOS5
698: # define OS_TYPE "SUNOS5"
699: extern int etext, _start;
700: extern char * GC_SysVGetDataStart();
701: # define DATASTART GC_SysVGetDataStart(0x1000, &etext)
702: # define STACKBOTTOM ((ptr_t)(&_start))
703: /** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
704: /*# define PROC_VDB*/
705: # define DYNAMIC_LOADING
706: # ifndef USE_MMAP
707: # define USE_MMAP
708: # endif
709: # ifdef USE_MMAP
710: # define HEAP_START (ptr_t)0x40000000
711: # else
712: # define HEAP_START DATAEND
713: # endif
714: # endif
715: # ifdef SCO
716: # define OS_TYPE "SCO"
717: extern int etext;
718: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
719: & ~0x3fffff) \
720: +((word)&etext & 0xfff))
721: # define STACKBOTTOM ((ptr_t) 0x7ffffffc)
722: # endif
723: # ifdef SCO_ELF
724: # define OS_TYPE "SCO_ELF"
725: extern int etext;
726: # define DATASTART ((ptr_t)(&etext))
727: # define STACKBOTTOM ((ptr_t) 0x08048000)
728: # define DYNAMIC_LOADING
729: # define ELF_CLASS ELFCLASS32
730: # endif
731: # ifdef LINUX
732: # define OS_TYPE "LINUX"
1.1.1.3 ! maekawa 733: # define LINUX_STACKBOTTOM
! 734: # if 0
! 735: # define HEURISTIC1
! 736: # undef STACK_GRAN
! 737: # define STACK_GRAN 0x10000000
! 738: /* STACKBOTTOM is usually 0xc0000000, but this changes with */
! 739: /* different kernel configurations. In particular, systems */
! 740: /* with 2GB physical memory will usually move the user */
! 741: /* address space limit, and hence initial SP to 0x80000000. */
! 742: # endif
1.1 maekawa 743: # if !defined(LINUX_THREADS) || !defined(REDIRECT_MALLOC)
744: # define MPROTECT_VDB
745: # else
746: /* We seem to get random errors in incremental mode, */
747: /* possibly because Linux threads is itself a malloc client */
748: /* and can't deal with the signals. */
749: # endif
750: # ifdef __ELF__
751: # define DYNAMIC_LOADING
752: # ifdef UNDEFINED /* includes ro data */
753: extern int _etext;
754: # define DATASTART ((ptr_t)((((word) (&_etext)) + 0xfff) & ~0xfff))
755: # endif
756: # include <features.h>
757: # if defined(__GLIBC__) && __GLIBC__ >= 2
1.1.1.3 ! maekawa 758: # define LINUX_DATA_START
1.1 maekawa 759: # else
760: extern char **__environ;
761: # define DATASTART ((ptr_t)(&__environ))
762: /* hideous kludge: __environ is the first */
763: /* word in crt0.o, and delimits the start */
764: /* of the data segment, no matter which */
765: /* ld options were passed through. */
766: /* We could use _etext instead, but that */
767: /* would include .rodata, which may */
768: /* contain large read-only data tables */
769: /* that we'd rather not scan. */
770: # endif
771: extern int _end;
772: # define DATAEND (&_end)
773: # else
774: extern int etext;
775: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
776: # endif
1.1.1.3 ! maekawa 777: # ifdef USE_I686_PREFETCH
! 778: # define PREFETCH(x) \
! 779: __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
! 780: /* Empirically prefetcht0 is much more effective at reducing */
! 781: /* cache miss stalls for the targetted load instructions. But it */
! 782: /* seems to interfere enough with other cache traffic that the net */
! 783: /* result is worse than prefetchnta. */
! 784: # if 0
! 785: /* Using prefetches for write seems to have a slight negative */
! 786: /* impact on performance, at least for a PIII/500. */
! 787: # define PREFETCH_FOR_WRITE(x) \
! 788: __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
! 789: # endif
! 790: # endif
! 791: # ifdef USE_3DNOW_PREFETCH
! 792: # define PREFETCH(x) \
! 793: __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
! 794: # define PREFETCH_FOR_WRITE(x)
! 795: __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
! 796: # endif
1.1 maekawa 797: # endif
798: # ifdef CYGWIN32
799: # define OS_TYPE "CYGWIN32"
800: extern int _data_start__;
801: extern int _data_end__;
802: extern int _bss_start__;
803: extern int _bss_end__;
804: /* For binutils 2.9.1, we have */
805: /* DATASTART = _data_start__ */
806: /* DATAEND = _bss_end__ */
807: /* whereas for some earlier versions it was */
808: /* DATASTART = _bss_start__ */
809: /* DATAEND = _data_end__ */
810: /* To get it right for both, we take the */
811: /* minumum/maximum of the two. */
812: # define MAX(x,y) ((x) > (y) ? (x) : (y))
813: # define MIN(x,y) ((x) < (y) ? (x) : (y))
814: # define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__))
815: # define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__))
816: # undef STACK_GRAN
817: # define STACK_GRAN 0x10000
818: # define HEURISTIC1
819: # endif
820: # ifdef OS2
821: # define OS_TYPE "OS2"
822: /* STACKBOTTOM and DATASTART are handled specially in */
823: /* os_dep.c. OS2 actually has the right */
824: /* system call! */
825: # define DATAEND /* not needed */
826: # endif
827: # ifdef MSWIN32
828: # define OS_TYPE "MSWIN32"
829: /* STACKBOTTOM and DATASTART are handled specially in */
830: /* os_dep.c. */
831: # ifndef __WATCOMC__
832: # define MPROTECT_VDB
833: # endif
834: # define DATAEND /* not needed */
835: # endif
836: # ifdef DJGPP
837: # define OS_TYPE "DJGPP"
838: # include "stubinfo.h"
839: extern int etext;
840: extern int _stklen;
841: extern int __djgpp_stack_limit;
842: # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff))
843: /* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
844: + _stklen)) */
845: # define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
846: /* This may not be right. */
847: # endif
848: # ifdef OPENBSD
849: # define OS_TYPE "OPENBSD"
850: # endif
851: # ifdef FREEBSD
852: # define OS_TYPE "FREEBSD"
853: # define MPROTECT_VDB
854: # endif
855: # ifdef NETBSD
856: # define OS_TYPE "NETBSD"
857: # endif
858: # ifdef THREE86BSD
859: # define OS_TYPE "THREE86BSD"
860: # endif
861: # ifdef BSDI
862: # define OS_TYPE "BSDI"
863: # endif
864: # if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) \
865: || defined(THREE86BSD) || defined(BSDI)
866: # define HEURISTIC2
867: extern char etext;
868: # define DATASTART ((ptr_t)(&etext))
869: # endif
870: # ifdef NEXT
871: # define OS_TYPE "NEXT"
872: # define DATASTART ((ptr_t) get_etext())
873: # define STACKBOTTOM ((ptr_t)0xc0000000)
874: # define DATAEND /* not needed */
875: # endif
876: # ifdef DOS4GW
877: # define OS_TYPE "DOS4GW"
878: extern long __nullarea;
879: extern char _end;
880: extern char *_STACKTOP;
881: /* Depending on calling conventions Watcom C either precedes
882: or does not precedes with undescore names of C-variables.
883: Make sure startup code variables always have the same names. */
884: #pragma aux __nullarea "*";
885: #pragma aux _end "*";
886: # define STACKBOTTOM ((ptr_t) _STACKTOP)
887: /* confused? me too. */
888: # define DATASTART ((ptr_t) &__nullarea)
889: # define DATAEND ((ptr_t) &_end)
890: # endif
891: # endif
892:
893: # ifdef NS32K
894: # define MACH_TYPE "NS32K"
895: # define ALIGNMENT 4
896: extern char **environ;
897: # define DATASTART ((ptr_t)(&environ))
898: /* hideous kludge: environ is the first */
899: /* word in crt0.o, and delimits the start */
900: /* of the data segment, no matter which */
901: /* ld options were passed through. */
902: # define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
903: # endif
904:
905: # ifdef MIPS
906: # define MACH_TYPE "MIPS"
907: /* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
1.1.1.3 ! maekawa 908: # ifdef LINUX
! 909: /* This was developed for a linuxce style platform. Probably */
! 910: /* needs to be tweaked for workstation class machines. */
! 911: # define OS_TYPE "LINUX"
! 912: extern int __data_start;
! 913: # define DATASTART ((ptr_t)(&__data_start))
! 914: # define ALIGNMENT 4
! 915: # define USE_GENERIC_PUSH_REGS 1
! 916: # define STACKBOTTOM 0x80000000
! 917: /* In many cases, this should probably use LINUX_STACKBOTTOM */
! 918: /* instead. But some kernel versions seem to give the wrong */
! 919: /* value from /proc. */
! 920: # endif /* Linux */
1.1 maekawa 921: # ifdef ULTRIX
1.1.1.3 ! maekawa 922: # define HEURISTIC2
! 923: # define DATASTART (ptr_t)0x10000000
! 924: /* Could probably be slightly higher since */
! 925: /* startup code allocates lots of stuff. */
1.1 maekawa 926: # define OS_TYPE "ULTRIX"
927: # define ALIGNMENT 4
928: # endif
929: # ifdef RISCOS
1.1.1.3 ! maekawa 930: # define HEURISTIC2
! 931: # define DATASTART (ptr_t)0x10000000
1.1 maekawa 932: # define OS_TYPE "RISCOS"
933: # define ALIGNMENT 4 /* Required by hardware */
934: # endif
935: # ifdef IRIX5
1.1.1.3 ! maekawa 936: # define HEURISTIC2
! 937: extern int _fdata;
! 938: # define DATASTART ((ptr_t)(&_fdata))
! 939: # ifdef USE_MMAP
! 940: # define HEAP_START (ptr_t)0x30000000
! 941: # else
! 942: # define HEAP_START DATASTART
! 943: # endif
! 944: /* Lowest plausible heap address. */
! 945: /* In the MMAP case, we map there. */
! 946: /* In either case it is used to identify */
! 947: /* heap sections so they're not */
! 948: /* considered as roots. */
1.1 maekawa 949: # define OS_TYPE "IRIX5"
950: # define MPROTECT_VDB
951: # ifdef _MIPS_SZPTR
952: # define CPP_WORDSZ _MIPS_SZPTR
953: # define ALIGNMENT (_MIPS_SZPTR/8)
954: # if CPP_WORDSZ != 64
955: # define ALIGN_DOUBLE
956: # endif
957: # else
958: # define ALIGNMENT 4
959: # define ALIGN_DOUBLE
960: # endif
961: # define DYNAMIC_LOADING
962: # endif
963: # endif
964:
965: # ifdef RS6000
966: # define MACH_TYPE "RS6000"
967: # define ALIGNMENT 4
968: # define DATASTART ((ptr_t)0x20000000)
969: extern int errno;
970: # define STACKBOTTOM ((ptr_t)((ulong)&errno))
971: # define DYNAMIC_LOADING
972: /* For really old versions of AIX, this may have to be removed. */
973: # endif
974:
975: # ifdef HP_PA
1.1.1.2 maekawa 976: /* OS is assumed to be HP/UX */
1.1 maekawa 977: # define MACH_TYPE "HP_PA"
1.1.1.2 maekawa 978: # define OS_TYPE "HPUX"
979: # ifdef __LP64__
980: # define CPP_WORDSZ 64
981: # define ALIGNMENT 8
982: # else
983: # define CPP_WORDSZ 32
984: # define ALIGNMENT 4
985: # define ALIGN_DOUBLE
986: # endif
1.1 maekawa 987: extern int __data_start;
988: # define DATASTART ((ptr_t)(&__data_start))
989: # if 0
990: /* The following appears to work for 7xx systems running HP/UX */
991: /* 9.xx Furthermore, it might result in much faster */
992: /* collections than HEURISTIC2, which may involve scanning */
993: /* segments that directly precede the stack. It is not the */
994: /* default, since it may not work on older machine/OS */
995: /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
996: /* this.) */
997: # define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */
998: # else
1.1.1.3 ! maekawa 999: /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
! 1000: /* to this. We'll probably do this on other platforms, too. */
! 1001: /* For now I'll use it where I can test it. */
! 1002: extern char ** environ;
! 1003: # define STACKBOTTOM ((ptr_t)environ)
1.1 maekawa 1004: # endif
1005: # define STACK_GROWS_UP
1006: # define DYNAMIC_LOADING
1.1.1.2 maekawa 1007: # ifndef HPUX_THREADS
1008: # define MPROTECT_VDB
1009: # endif
1.1 maekawa 1010: # include <unistd.h>
1011: # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
1012: # endif
1013:
1014: # ifdef ALPHA
1015: # define MACH_TYPE "ALPHA"
1016: # define ALIGNMENT 8
1.1.1.3 ! maekawa 1017: # define USE_GENERIC_PUSH_REGS
! 1018: /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
! 1019: /* fp registers in some cases when the target is a 21264. The assembly */
! 1020: /* code doesn't handle that yet, and version dependencies make that a */
! 1021: /* bit tricky. Do the easy thing for now. */
1.1 maekawa 1022: # ifdef OSF1
1023: # define OS_TYPE "OSF1"
1024: # define DATASTART ((ptr_t) 0x140000000)
1.1.1.3 ! maekawa 1025: extern int _end;
1.1 maekawa 1026: # define DATAEND ((ptr_t) &_end)
1027: # define HEURISTIC2
1028: /* Normally HEURISTIC2 is too conervative, since */
1029: /* the text segment immediately follows the stack. */
1030: /* Hence we give an upper pound. */
1031: extern int __start;
1032: # define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1)))
1033: # define CPP_WORDSZ 64
1034: # define MPROTECT_VDB
1035: # define DYNAMIC_LOADING
1036: # endif
1037: # ifdef LINUX
1038: # define OS_TYPE "LINUX"
1039: # define CPP_WORDSZ 64
1040: # define STACKBOTTOM ((ptr_t) 0x120000000)
1041: # ifdef __ELF__
1.1.1.3 ! maekawa 1042: # define LINUX_DATA_START
1.1.1.2 maekawa 1043: # define DYNAMIC_LOADING
1.1.1.3 ! maekawa 1044: /* This doesn't work if the collector is in a dynamic library. */
1.1 maekawa 1045: # else
1046: # define DATASTART ((ptr_t) 0x140000000)
1047: # endif
1048: extern int _end;
1049: # define DATAEND (&_end)
1050: # define MPROTECT_VDB
1051: /* Has only been superficially tested. May not */
1052: /* work on all versions. */
1053: # endif
1054: # endif
1055:
1.1.1.2 maekawa 1056: # ifdef IA64
1057: # define MACH_TYPE "IA64"
1058: # define ALIGN_DOUBLE
1059: /* Requires 16 byte alignment for malloc */
1060: # define ALIGNMENT 8
1.1.1.3 ! maekawa 1061: # define USE_GENERIC_PUSH_REGS
! 1062: /* We need to get preserved registers in addition to register windows. */
! 1063: /* That's easiest to do with setjmp. */
1.1.1.2 maekawa 1064: # ifdef HPUX
1065: --> needs work
1066: # endif
1067: # ifdef LINUX
1068: # define OS_TYPE "LINUX"
1069: # define CPP_WORDSZ 64
1070: /* This should really be done through /proc, but that */
1071: /* requires we run on an IA64 kernel. */
1072: # define STACKBOTTOM ((ptr_t) 0xa000000000000000l)
1073: /* We also need the base address of the register stack */
1074: /* backing store. There is probably a better way to */
1075: /* get that, too ... */
1076: # define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l)
1.1.1.3 ! maekawa 1077: # if 1
! 1078: # define SEARCH_FOR_DATA_START
! 1079: # define DATASTART GC_data_start
! 1080: # else
! 1081: extern int data_start;
! 1082: # define DATASTART ((ptr_t)(&data_start))
! 1083: # endif
1.1.1.2 maekawa 1084: # define DYNAMIC_LOADING
1.1.1.3 ! maekawa 1085: # define MPROTECT_VDB
! 1086: /* Requires Linux 2.3.47 or later. */
1.1.1.2 maekawa 1087: extern int _end;
1088: # define DATAEND (&_end)
1.1.1.3 ! maekawa 1089: # define PREFETCH(x) \
! 1090: __asm__ (" lfetch [%0]": : "r"((void *)(x)))
! 1091: # define PREFETCH_FOR_WRITE(x) \
! 1092: __asm__ (" lfetch.excl [%0]": : "r"((void *)(x)))
! 1093: # define CLEAR_DOUBLE(x) \
! 1094: __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
1.1.1.2 maekawa 1095: # endif
1096: # endif
1097:
1.1 maekawa 1098: # ifdef M88K
1099: # define MACH_TYPE "M88K"
1100: # define ALIGNMENT 4
1101: # define ALIGN_DOUBLE
1102: extern int etext;
1103: # ifdef CX_UX
1104: # define OS_TYPE "CX_UX"
1105: # define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000)
1106: # endif
1107: # ifdef DGUX
1108: # define OS_TYPE "DGUX"
1109: extern char * GC_SysVGetDataStart();
1110: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
1111: # endif
1112: # define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
1113: # endif
1114:
1115: # ifdef S370
1116: # define MACH_TYPE "S370"
1117: # define OS_TYPE "UTS4"
1118: # define ALIGNMENT 4 /* Required by hardware */
1119: extern int etext;
1120: extern int _etext;
1121: extern int _end;
1122: extern char * GC_SysVGetDataStart();
1123: # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
1124: # define DATAEND (&_end)
1125: # define HEURISTIC2
1126: # endif
1127:
1.1.1.2 maekawa 1128: # if defined(PJ)
1129: # define ALIGNMENT 4
1130: extern int _etext;
1131: # define DATASTART ((ptr_t)(&_etext))
1132: # define HEURISTIC1
1133: # endif
1134:
1135: # ifdef ARM32
1136: # define CPP_WORDSZ 32
1137: # define MACH_TYPE "ARM32"
1138: # define ALIGNMENT 4
1139: # ifdef NETBSD
1140: # define OS_TYPE "NETBSD"
1141: # define HEURISTIC2
1142: extern char etext;
1143: # define DATASTART ((ptr_t)(&etext))
1144: # define USE_GENERIC_PUSH_REGS
1145: # endif
1.1.1.3 ! maekawa 1146: # ifdef LINUX
! 1147: # define OS_TYPE "LINUX"
! 1148: # define HEURISTIC1
! 1149: # undef STACK_GRAN
! 1150: # define STACK_GRAN 0x10000000
! 1151: # define USE_GENERIC_PUSH_REGS
! 1152: # ifdef __ELF__
! 1153: # define DYNAMIC_LOADING
! 1154: # include <features.h>
! 1155: # if defined(__GLIBC__) && __GLIBC__ >= 2
! 1156: # define LINUX_DATA_START
! 1157: # else
! 1158: extern char **__environ;
! 1159: # define DATASTART ((ptr_t)(&__environ))
! 1160: /* hideous kludge: __environ is the first */
! 1161: /* word in crt0.o, and delimits the start */
! 1162: /* of the data segment, no matter which */
! 1163: /* ld options were passed through. */
! 1164: /* We could use _etext instead, but that */
! 1165: /* would include .rodata, which may */
! 1166: /* contain large read-only data tables */
! 1167: /* that we'd rather not scan. */
! 1168: # endif
! 1169: extern int _end;
! 1170: # define DATAEND (&_end)
! 1171: # else
! 1172: extern int etext;
! 1173: # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
! 1174: # endif
! 1175: # endif
! 1176: #endif
! 1177:
! 1178: #ifdef LINUX_DATA_START
! 1179: /* Some Linux distributions arrange to define __data_start. Some */
! 1180: /* define data_start as a weak symbol. The latter is technically */
! 1181: /* broken, since the user program may define data_start, in which */
! 1182: /* case we lose. Nonetheless, we try both, prefering __data_start. */
! 1183: /* We assume gcc. */
! 1184: # pragma weak __data_start
! 1185: extern int __data_start;
! 1186: # pragma weak data_start
! 1187: extern int data_start;
! 1188: # define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start))
1.1.1.2 maekawa 1189: #endif
1190:
1.1 maekawa 1191: # ifndef STACK_GROWS_UP
1192: # define STACK_GROWS_DOWN
1193: # endif
1194:
1195: # ifndef CPP_WORDSZ
1196: # define CPP_WORDSZ 32
1197: # endif
1198:
1199: # ifndef OS_TYPE
1200: # define OS_TYPE ""
1201: # endif
1202:
1203: # ifndef DATAEND
1204: extern int end;
1205: # define DATAEND (&end)
1206: # endif
1207:
1208: # if defined(SVR4) && !defined(GETPAGESIZE)
1209: # include <unistd.h>
1210: # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
1211: # endif
1212:
1213: # ifndef GETPAGESIZE
1214: # if defined(SUNOS5) || defined(IRIX5)
1215: # include <unistd.h>
1216: # endif
1217: # define GETPAGESIZE() getpagesize()
1218: # endif
1219:
1220: # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
1221: /* OS has SVR4 generic features. Probably others also qualify. */
1222: # define SVR4
1223: # endif
1224:
1225: # if defined(SUNOS5) || defined(DRSNX)
1226: /* OS has SUNOS5 style semi-undocumented interface to dynamic */
1227: /* loader. */
1228: # define SUNOS5DL
1229: /* OS has SUNOS5 style signal handlers. */
1230: # define SUNOS5SIGS
1231: # endif
1232:
1.1.1.2 maekawa 1233: # if defined(HPUX)
1234: # define SUNOS5SIGS
1235: # endif
1236:
1.1 maekawa 1237: # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
1238: -> bad word size
1239: # endif
1240:
1241: # ifdef PCR
1242: # undef DYNAMIC_LOADING
1243: # undef STACKBOTTOM
1244: # undef HEURISTIC1
1245: # undef HEURISTIC2
1246: # undef PROC_VDB
1247: # undef MPROTECT_VDB
1248: # define PCR_VDB
1249: # endif
1250:
1251: # ifdef SRC_M3
1252: /* Postponed for now. */
1253: # undef PROC_VDB
1254: # undef MPROTECT_VDB
1255: # endif
1256:
1257: # ifdef SMALL_CONFIG
1258: /* Presumably not worth the space it takes. */
1259: # undef PROC_VDB
1260: # undef MPROTECT_VDB
1261: # endif
1262:
1.1.1.2 maekawa 1263: # ifdef USE_MUNMAP
1264: # undef MPROTECT_VDB /* Can't deal with address space holes. */
1265: # endif
1266:
1.1 maekawa 1267: # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
1268: # define DEFAULT_VDB
1269: # endif
1270:
1.1.1.3 ! maekawa 1271: # ifndef PREFETCH
! 1272: # define PREFETCH(x)
! 1273: # define NO_PREFETCH
! 1274: # endif
! 1275:
! 1276: # ifndef PREFETCH_FOR_WRITE
! 1277: # define PREFETCH_FOR_WRITE(x)
! 1278: # define NO_PREFETCH_FOR_WRITE
! 1279: # endif
! 1280:
! 1281: # ifndef CACHE_LINE_SIZE
! 1282: # define CACHE_LINE_SIZE 32 /* Wild guess */
! 1283: # endif
! 1284:
! 1285: # ifndef CLEAR_DOUBLE
! 1286: # define CLEAR_DOUBLE(x) \
! 1287: ((word*)x)[0] = 0; \
! 1288: ((word*)x)[1] = 0;
! 1289: # endif /* CLEAR_DOUBLE */
! 1290:
1.1 maekawa 1291: # if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
1292: # define SOLARIS_THREADS
1293: # endif
1294: # if defined(IRIX_THREADS) && !defined(IRIX5)
1295: --> inconsistent configuration
1296: # endif
1297: # if defined(IRIX_JDK_THREADS) && !defined(IRIX5)
1298: --> inconsistent configuration
1299: # endif
1300: # if defined(LINUX_THREADS) && !defined(LINUX)
1301: --> inconsistent configuration
1302: # endif
1303: # if defined(SOLARIS_THREADS) && !defined(SUNOS5)
1304: --> inconsistent configuration
1305: # endif
1.1.1.2 maekawa 1306: # if defined(HPUX_THREADS) && !defined(HPUX)
1307: --> inconsistent configuration
1308: # endif
1.1 maekawa 1309: # if defined(PCR) || defined(SRC_M3) || \
1310: defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
1311: defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
1.1.1.2 maekawa 1312: defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
1.1 maekawa 1313: # define THREADS
1314: # endif
1315:
1316: # if defined(HP_PA) || defined(M88K) || defined(POWERPC) \
1317: || (defined(I386) && defined(OS2)) || defined(UTS4) || defined(LINT)
1318: /* Use setjmp based hack to mark from callee-save registers. */
1319: # define USE_GENERIC_PUSH_REGS
1320: # endif
1321: # if defined(SPARC) && !defined(LINUX)
1322: # define SAVE_CALL_CHAIN
1323: # define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
1324: /* include assembly code to do it well. */
1325: # endif
1326:
1.1.1.3 ! maekawa 1327: # endif /* GCCONFIG_H */
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