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/libs/headers/gc/private/gcconfig.h

http://github.com/nddrylliog/ooc
C++ Header | 2059 lines | 1564 code | 47 blank | 448 comment | 275 complexity | 2a6a61c616fd00185f50c6008a551596 MD5 | raw file
    

  1. /* 
    2. 

  2.  * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
    3. 

  3.  * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
    4. 

  4.  * Copyright (c) 1996 by Silicon Graphics.  All rights reserved.
    5. 

  5.  * Copyright (c) 2000-2004 Hewlett-Packard Development Company, L.P.
    6. 

  6.  *
    7. 

  7.  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
    8. 

  8.  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
    9. 

  9.  *
    10. 

  10.  * Permission is hereby granted to use or copy this program
    11. 

  11.  * for any purpose,  provided the above notices are retained on all copies.
    12. 

  12.  * Permission to modify the code and to distribute modified code is granted,
    13. 

  13.  * provided the above notices are retained, and a notice that the code was
    14. 

  14.  * modified is included with the above copyright notice.
    15. 

  15.  */
    16. 

  16. 

  17. /*
    18. 

  18.  * This header is private to the gc.  It is almost always included from
    19. 

  19.  * gc_priv.h.  However it is possible to include it by itself if just the
    20. 

  20.  * configuration macros are needed.  In that
    21. 

  21.  * case, a few declarations relying on types declared in gc_priv.h will be
    22. 

  22.  * omitted.
    23. 

  23.  */
    24. 

  24.  
    25. 

  25. #ifndef GCCONFIG_H
    26. 

  26. 

  27. # define GCCONFIG_H
    28. 

  28. 

  29. # ifndef GC_PRIVATE_H
    30. 

  30.     /* Fake ptr_t declaration, just to avoid compilation errors.	*/
    31. 

  31.     /* This avoids many instances if "ifndef GC_PRIVATE_H" below.	*/
    32. 

  32.     typedef struct GC_undefined_struct * ptr_t;
    33. 

  33. #   include <stddef.h>	/* For size_t etc. */
    34. 

  34. # endif
    35. 

  35. 

  36. /* Machine dependent parameters.  Some tuning parameters can be found	*/
    37. 

  37. /* near the top of gc_private.h.					*/
    38. 

  38. 

  39. /* Machine specific parts contributed by various people.  See README file. */
    40. 

  40. 

  41. /* First a unified test for Linux: */
    42. 

  42. # if defined(linux) || defined(__linux__)
    43. 

  43. #  ifndef LINUX
    44. 

  44. #    define LINUX
    45. 

  45. #  endif
    46. 

  46. # endif
    47. 

  47. 

  48. /* And one for NetBSD: */
    49. 

  49. # if defined(__NetBSD__)
    50. 

  50. #    define NETBSD
    51. 

  51. # endif
    52. 

  52. 

  53. /* And one for OpenBSD: */
    54. 

  54. # if defined(__OpenBSD__)
    55. 

  55. #    define OPENBSD
    56. 

  56. # endif
    57. 

  57. 

  58. /* And one for FreeBSD: */
    59. 

  59. # if (defined(__FreeBSD__) || defined(__DragonFly__) || \
    60. 

  60.       defined(__FreeBSD_kernel__)) && !defined(FREEBSD)
    61. 

  61. #    define FREEBSD
    62. 

  62. # endif
    63. 

  63. 

  64. /* Determine the machine type: */
    65. 

  65. # if defined(__arm__) || defined(__thumb__)
    66. 

  66. #    define ARM32
    67. 

  67. #    if !defined(LINUX) && !defined(NETBSD)
    68. 

  68. #      define NOSYS
    69. 

  69. #      define mach_type_known
    70. 

  70. #    endif
    71. 

  71. # endif
    72. 

  72. # if defined(sun) && defined(mc68000)
    73. 

  73. #    error SUNOS4 no longer supported
    74. 

  74. # endif
    75. 

  75. # if defined(hp9000s300)
    76. 

  76. #    error M68K based HP machines no longer supported.
    77. 

  77. # endif
    78. 

  78. # if defined(OPENBSD) && defined(m68k)
    79. 

  79. #    define M68K
    80. 

  80. #    define mach_type_known
    81. 

  81. # endif
    82. 

  82. # if defined(OPENBSD) && defined(__sparc__)
    83. 

  83. #    define SPARC
    84. 

  84. #    define mach_type_known
    85. 

  85. # endif
    86. 

  86. # if defined(NETBSD) && (defined(m68k) || defined(__m68k__))
    87. 

  87. #    define M68K
    88. 

  88. #    define mach_type_known
    89. 

  89. # endif
    90. 

  90. # if defined(NETBSD) && defined(__powerpc__)
    91. 

  91. #    define POWERPC
    92. 

  92. #    define mach_type_known
    93. 

  93. # endif
    94. 

  94. # if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))
    95. 

  95. #    define ARM32
    96. 

  96. #    define mach_type_known
    97. 

  97. # endif
    98. 

  98. # if defined(NETBSD) && defined(__sh__)
    99. 

  99. #    define SH
    100. 

  100. #    define mach_type_known
    101. 

  101. # endif
    102. 

  102. # if defined(vax)
    103. 

  103. #    define VAX
    104. 

  104. #    ifdef ultrix
    105. 

  105. #	define ULTRIX
    106. 

  106. #    else
    107. 

  107. #	define BSD
    108. 

  108. #    endif
    109. 

  109. #    define mach_type_known
    110. 

  110. # endif
    111. 

  111. # if defined(__NetBSD__) && defined(__vax__)
    112. 

  112. #    define VAX
    113. 

  113. #    define mach_type_known
    114. 

  114. # endif
    115. 

  115. # if defined(mips) || defined(__mips) || defined(_mips)
    116. 

  116. #    define MIPS
    117. 

  117. #    if defined(nec_ews) || defined(_nec_ews)
    118. 

  118. #      define EWS4800
    119. 

  119. #    endif
    120. 

  120. #    if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD)
    121. 

  121. #      if defined(ultrix) || defined(__ultrix)
    122. 

  122. #	 define ULTRIX
    123. 

  123. #      else
    124. 

  124. #	 define IRIX5   /* or IRIX 6.X */
    125. 

  125. #      endif
    126. 

  126. #    endif /* !LINUX */
    127. 

  127. #    if defined(__NetBSD__) && defined(__MIPSEL__)
    128. 

  128. #      undef ULTRIX
    129. 

  129. #    endif
    130. 

  130. #    define mach_type_known
    131. 

  131. # endif
    132. 

  132. # if defined(DGUX) && (defined(i386) || defined(__i386__))
    133. 

  133. #    define I386
    134. 

  134. #    ifndef _USING_DGUX
    135. 

  135. #    define _USING_DGUX
    136. 

  136. #    endif
    137. 

  137. #    define mach_type_known
    138. 

  138. # endif
    139. 

  139. # if defined(sequent) && (defined(i386) || defined(__i386__))
    140. 

  140. #    define I386
    141. 

  141. #    define SEQUENT
    142. 

  142. #    define mach_type_known
    143. 

  143. # endif
    144. 

  144. # if defined(sun) && (defined(i386) || defined(__i386__))
    145. 

  145. #    define I386
    146. 

  146. #    define SOLARIS
    147. 

  147. #    define mach_type_known
    148. 

  148. # endif
    149. 

  149. # if defined(sun) && defined(__amd64)
    150. 

  150. #    define X86_64
    151. 

  151. #    define SOLARIS
    152. 

  152. #    define mach_type_known
    153. 

  153. # endif
    154. 

  154. # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
    155. 

  155. #    define I386
    156. 

  156. #    define OS2
    157. 

  157. #    define mach_type_known
    158. 

  158. # endif
    159. 

  159. # if defined(ibm032)
    160. 

  160. #   error IBM PC/RT no longer supported.
    161. 

  161. # endif
    162. 

  162. # if defined(sun) && (defined(sparc) || defined(__sparc))
    163. 

  163. #   define SPARC
    164. 

  164.     /* Test for SunOS 5.x */
    165. 

  165. #     include <errno.h>
    166. 

  166. #     define SOLARIS
    167. 

  167. #   define mach_type_known
    168. 

  168. # endif
    169. 

  169. # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
    170. 

  170.      && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__) \
    171. 

  171.      && !defined(__DragonFly__)
    172. 

  172. #   define SPARC
    173. 

  173. #   define DRSNX
    174. 

  174. #   define mach_type_known
    175. 

  175. # endif
    176. 

  176. # if defined(_IBMR2)
    177. 

  177. #   define POWERPC
    178. 

  178. #   define AIX
    179. 

  179. #   define mach_type_known
    180. 

  180. # endif
    181. 

  181. # if defined(__NetBSD__) && defined(__sparc__)
    182. 

  182. #   define SPARC
    183. 

  183. #   define mach_type_known
    184. 

  184. # endif
    185. 

  185. # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
    186. 

  186. 	/* The above test may need refinement	*/
    187. 

  187. #   define I386
    188. 

  188. #   if defined(_SCO_ELF)
    189. 

  189. #     define SCO_ELF
    190. 

  190. #   else
    191. 

  191. #     define SCO
    192. 

  192. #   endif
    193. 

  193. #   define mach_type_known
    194. 

  194. # endif
    195. 

  195. # if defined(_AUX_SOURCE)
    196. 

  196. #   error A/UX no longer supported
    197. 

  197. # endif
    198. 

  198. # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
    199. 

  199.      || defined(hppa) || defined(__hppa__)
    200. 

  200. #   define HP_PA
    201. 

  201. #   if !defined(LINUX) && !defined(HPUX)
    202. 

  202. #     define HPUX
    203. 

  203. #   endif
    204. 

  204. #   define mach_type_known
    205. 

  205. # endif
    206. 

  206. # if defined(__ia64) && (defined(_HPUX_SOURCE) || defined(__HP_aCC))
    207. 

  207. #   define IA64
    208. 

  208. #   ifndef HPUX
    209. 

  209. #     define HPUX
    210. 

  210. #   endif
    211. 

  211. #   define mach_type_known
    212. 

  212. # endif
    213. 

  213. # if defined(__BEOS__) && defined(_X86_)
    214. 

  214. #    define I386
    215. 

  215. #    define BEOS
    216. 

  216. #    define mach_type_known
    217. 

  217. # endif
    218. 

  218. # if defined(LINUX) && (defined(i386) || defined(__i386__))
    219. 

  219. #    define I386
    220. 

  220. #    define mach_type_known
    221. 

  221. # endif
    222. 

  222. # if defined(LINUX) && defined(__x86_64__)
    223. 

  223. #    define X86_64
    224. 

  224. #    define mach_type_known
    225. 

  225. # endif
    226. 

  226. # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
    227. 

  227. #    define IA64
    228. 

  228. #    define mach_type_known
    229. 

  229. # endif
    230. 

  230. # if defined(LINUX) && defined(__arm__)
    231. 

  231. #    define ARM32
    232. 

  232. #    define mach_type_known
    233. 

  233. # endif
    234. 

  234. # if defined(LINUX) && defined(__cris__)
    235. 

  235. #    ifndef CRIS
    236. 

  236. #	define CRIS
    237. 

  237. #    endif
    238. 

  238. #    define mach_type_known
    239. 

  239. # endif
    240. 

  240. # if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) || \
    241. 

  241. 		        defined(powerpc64) || defined(__powerpc64__))
    242. 

  242. #    define POWERPC
    243. 

  243. #    define mach_type_known
    244. 

  244. # endif
    245. 

  245. # if defined(FREEBSD) && (defined(powerpc) || defined(__powerpc__))
    246. 

  246. #    define POWERPC
    247. 

  247. #    define mach_type_known
    248. 

  248. # endif
    249. 

  249. # if defined(LINUX) && defined(__mc68000__)
    250. 

  250. #    define M68K
    251. 

  251. #    define mach_type_known
    252. 

  252. # endif
    253. 

  253. # if defined(LINUX) && (defined(sparc) || defined(__sparc__))
    254. 

  254. #    define SPARC
    255. 

  255. #    define mach_type_known
    256. 

  256. # endif
    257. 

  257. # if defined(LINUX) && defined(__arm__)
    258. 

  258. #    define ARM32
    259. 

  259. #    define mach_type_known
    260. 

  260. # endif
    261. 

  261. # if defined(LINUX) && defined(__sh__)
    262. 

  262. #    define SH
    263. 

  263. #    define mach_type_known
    264. 

  264. # endif
    265. 

  265. # if defined(LINUX) && defined(__m32r__)
    266. 

  266. #    define M32R
    267. 

  267. #    define mach_type_known
    268. 

  268. # endif
    269. 

  269. # if defined(__alpha) || defined(__alpha__)
    270. 

  270. #   define ALPHA
    271. 

  271. #   if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)
    272. 

  272. #     define OSF1	/* a.k.a Digital Unix */
    273. 

  273. #   endif
    274. 

  274. #   define mach_type_known
    275. 

  275. # endif
    276. 

  276. # if defined(_AMIGA) && !defined(AMIGA)
    277. 

  277. #   define AMIGA
    278. 

  278. # endif
    279. 

  279. # ifdef AMIGA 
    280. 

  280. #   define M68K
    281. 

  281. #   define mach_type_known
    282. 

  282. # endif
    283. 

  283. # if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
    284. 

  284. #   define M68K
    285. 

  285. #   define MACOS
    286. 

  286. #   define mach_type_known
    287. 

  287. # endif
    288. 

  288. # if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)
    289. 

  289. #   define POWERPC
    290. 

  290. #   define MACOS
    291. 

  291. #   define mach_type_known
    292. 

  292. # endif
    293. 

  293. # if defined(macosx) || (defined(__APPLE__) && defined(__MACH__))
    294. 

  294. #   define DARWIN
    295. 

  295. #   if defined(__ppc__)  || defined(__ppc64__)
    296. 

  296. #    define POWERPC
    297. 

  297. #    define mach_type_known
    298. 

  298. #   elif defined(__x86_64__)
    299. 

  299. #    define X86_64
    300. 

  300. #    define mach_type_known
    301. 

  301. #   elif defined(__i386__)
    302. 

  302. #    define I386
    303. 

  303. #    define mach_type_known
    304. 

  304. #   endif
    305. 

  305. # endif
    306. 

  306. # if defined(NeXT) && defined(mc68000)
    307. 

  307. #   define M68K
    308. 

  308. #   define NEXT
    309. 

  309. #   define mach_type_known
    310. 

  310. # endif
    311. 

  311. # if defined(NeXT) && (defined(i386) || defined(__i386__))
    312. 

  312. #   define I386
    313. 

  313. #   define NEXT
    314. 

  314. #   define mach_type_known
    315. 

  315. # endif
    316. 

  316. # if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))
    317. 

  317. #   define I386
    318. 

  318. #   define OPENBSD
    319. 

  319. #   define mach_type_known
    320. 

  320. # endif
    321. 

  321. # if defined(FREEBSD) && (defined(i386) || defined(__i386__))
    322. 

  322. #   define I386
    323. 

  323. #   define mach_type_known
    324. 

  324. # endif
    325. 

  325. # if defined(FREEBSD) && defined(__x86_64__)
    326. 

  326. #   define X86_64
    327. 

  327. #   define mach_type_known
    328. 

  328. # endif
    329. 

  329. # if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
    330. 

  330. #   define I386
    331. 

  331. #   define mach_type_known
    332. 

  332. # endif
    333. 

  333. # if defined(__NetBSD__) && defined(__x86_64__)
    334. 

  334. #    define X86_64
    335. 

  335. #    define mach_type_known
    336. 

  336. # endif
    337. 

  337. # if defined(FREEBSD) && defined(__sparc__)
    338. 

  338. #    define SPARC
    339. 

  339. #    define mach_type_known
    340. 

  340. # endif
    341. 

  341. # if defined(bsdi) && (defined(i386) || defined(__i386__))
    342. 

  342. #    define I386
    343. 

  343. #    define BSDI
    344. 

  344. #    define mach_type_known
    345. 

  345. # endif
    346. 

  346. # if !defined(mach_type_known) && defined(__386BSD__)
    347. 

  347. #   define I386
    348. 

  348. #   define THREE86BSD
    349. 

  349. #   define mach_type_known
    350. 

  350. # endif
    351. 

  351. # if defined(_CX_UX) && defined(_M88K)
    352. 

  352. #   define M88K
    353. 

  353. #   define CX_UX
    354. 

  354. #   define mach_type_known
    355. 

  355. # endif
    356. 

  356. # if defined(DGUX) && defined(m88k)
    357. 

  357. #   define M88K
    358. 

  358.     /* DGUX defined */
    359. 

  359. #   define mach_type_known
    360. 

  360. # endif
    361. 

  361. # if defined(_WIN32_WCE)
    362. 

  362.     /* SH3, SH4, MIPS already defined for corresponding architectures */
    363. 

  363. #   if defined(SH3) || defined(SH4)
    364. 

  364. #     define SH
    365. 

  365. #   endif
    366. 

  366. #   if defined(x86)
    367. 

  367. #     define I386
    368. 

  368. #   endif
    369. 

  369. #   if defined(ARM)
    370. 

  370. #     define ARM32
    371. 

  371. #   endif
    372. 

  372. #   define MSWINCE
    373. 

  373. #   define mach_type_known
    374. 

  374. # else
    375. 

  375. #   if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
    376. 

  376.         || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
    377. 

  377. #     if defined(__LP64__) || defined(_WIN64)
    378. 

  378. #	define X86_64
    379. 

  379. #     else
    380. 

  380. #       define I386
    381. 

  381. #     endif
    382. 

  382. #     define MSWIN32	/* or Win64 */
    383. 

  383. #     define mach_type_known
    384. 

  384. #   endif
    385. 

  385. #   if defined(_MSC_VER) && defined(_M_IA64)
    386. 

  386. #     define IA64
    387. 

  387. #     define MSWIN32	/* Really win64, but we don't treat 64-bit 	*/
    388. 

  388. 			/* variants as a differnt platform.		*/
    389. 

  389. #   endif
    390. 

  390. # endif
    391. 

  391. # if defined(__DJGPP__)
    392. 

  392. #   define I386
    393. 

  393. #   ifndef DJGPP
    394. 

  394. #     define DJGPP  /* MSDOS running the DJGPP port of GCC */
    395. 

  395. #   endif
    396. 

  396. #   define mach_type_known
    397. 

  397. # endif
    398. 

  398. # if defined(__CYGWIN32__) || defined(__CYGWIN__)
    399. 

  399. #   define I386
    400. 

  400. #   define CYGWIN32
    401. 

  401. #   define mach_type_known
    402. 

  402. # endif
    403. 

  403. # if defined(__MINGW32__)
    404. 

  404. #   define I386
    405. 

  405. #   define MSWIN32
    406. 

  406. #   define mach_type_known
    407. 

  407. # endif
    408. 

  408. # if defined(__BORLANDC__)
    409. 

  409. #   define I386
    410. 

  410. #   define MSWIN32
    411. 

  411. #   define mach_type_known
    412. 

  412. # endif
    413. 

  413. # if defined(_UTS) && !defined(mach_type_known)
    414. 

  414. #   define S370
    415. 

  415. #   define UTS4
    416. 

  416. #   define mach_type_known
    417. 

  417. # endif
    418. 

  418. # if defined(__pj__)
    419. 

  419. #   error PicoJava no longer supported
    420. 

  420.     /* The implementation had problems, and I haven't heard of users	*/
    421. 

  421.     /* in ages.  If you want it resurrected, let me know.		*/
    422. 

  422. # endif
    423. 

  423. # if defined(__embedded__) && defined(PPC)
    424. 

  424. #   define POWERPC
    425. 

  425. #   define NOSYS
    426. 

  426. #   define mach_type_known
    427. 

  427. # endif
    428. 

  428. /* Ivan Demakov */
    429. 

  429. # if defined(__WATCOMC__) && defined(__386__)
    430. 

  430. #   define I386
    431. 

  431. #   if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
    432. 

  432. #     if defined(__OS2__)
    433. 

  433. #       define OS2
    434. 

  434. #     else
    435. 

  435. #       if defined(__WINDOWS_386__) || defined(__NT__)
    436. 

  436. #         define MSWIN32
    437. 

  437. #       else
    438. 

  438. #         define DOS4GW
    439. 

  439. #       endif
    440. 

  440. #     endif
    441. 

  441. #   endif
    442. 

  442. #   define mach_type_known
    443. 

  443. # endif
    444. 

  444. # if defined(__s390__) && defined(LINUX)
    445. 

  445. #    define S390
    446. 

  446. #    define mach_type_known
    447. 

  447. # endif
    448. 

  448. # if defined(__GNU__)
    449. 

  449. #   if defined(__i386__)
    450. 

  450. /* The Debian Hurd running on generic PC */  
    451. 

  451. #     define  HURD
    452. 

  452. #     define  I386
    453. 

  453. #     define  mach_type_known
    454. 

  454. #    endif 
    455. 

  455. # endif
    456. 

  456. # if defined(__TANDEM)
    457. 

  457.     /* Nonstop S-series */
    458. 

  458.     /* FIXME: Should recognize Integrity series? */
    459. 

  459. #   define MIPS
    460. 

  460. #   define NONSTOP
    461. 

  461. #   define mach_type_known
    462. 

  462. # endif
    463. 

  463. 

  464. /* Feel free to add more clauses here */
    465. 

  465. 

  466. /* Or manually define the machine type here.  A machine type is 	*/
    467. 

  467. /* characterized by the architecture.  Some				*/
    468. 

  468. /* machine types are further subdivided by OS.				*/
    469. 

  469. /* Macros such as LINUX, FREEBSD, etc. distinguish them.		*/
    470. 

  470. /* SYSV on an M68K actually means A/UX.					*/
    471. 

  471. /* The distinction in these cases is usually the stack starting address */
    472. 

  472. # ifndef mach_type_known
    473. 

  473. #   error "The collector has not been ported to this machine/OS combination."
    474. 

  474. # endif
    475. 

  475. 		    /* Mapping is: M68K       ==> Motorola 680X0	*/
    476. 

  476. 		    /*		   (NEXT, and SYSV (A/UX),		*/
    477. 

  477. 		    /*		   MACOS and AMIGA variants)		*/
    478. 

  478. 		    /*             I386       ==> Intel 386	 	*/
    479. 

  479. 		    /*		    (SEQUENT, OS2, SCO, LINUX, NETBSD,	*/
    480. 

  480. 		    /*		     FREEBSD, THREE86BSD, MSWIN32,	*/
    481. 

  481. 		    /* 		     BSDI,SOLARIS, NEXT, other variants)	*/
    482. 

  482.                     /*             NS32K      ==> Encore Multimax 	*/
    483. 

  483.                     /*             MIPS       ==> R2000 through R14K	*/
    484. 

  484.                     /*			(many variants)			*/
    485. 

  485.                     /*		   VAX	      ==> DEC VAX		*/
    486. 

  486.                     /*			(BSD, ULTRIX variants)		*/
    487. 

  487.                     /*		   HP_PA      ==> HP9000/700 & /800	*/
    488. 

  488.                     /*				  HP/UX, LINUX		*/
    489. 

  489. 		    /*		   SPARC      ==> SPARC	v7/v8/v9	*/
    490. 

  490. 		    /*			(SOLARIS, LINUX, DRSNX variants)	*/
    491. 

  491. 		    /* 		   ALPHA      ==> DEC Alpha 		*/
    492. 

  492. 		    /*			(OSF1 and LINUX variants)	*/
    493. 

  493. 		    /* 		   M88K       ==> Motorola 88XX0        */
    494. 

  494. 		    /* 		        (CX_UX and DGUX)		*/
    495. 

  495. 		    /* 		   S370	      ==> 370-like machine	*/
    496. 

  496. 		    /* 			running Amdahl UTS4		*/
    497. 

  497.                     /*             S390       ==> 390-like machine      */
    498. 

  498. 		    /*                  running LINUX                   */
    499. 

  499. 		    /* 		   ARM32      ==> Intel StrongARM	*/
    500. 

  500. 		    /* 		   IA64	      ==> Intel IPF		*/
    501. 

  501. 		    /*				  (e.g. Itanium)	*/
    502. 

  502. 		    /*			(LINUX and HPUX)	        */
    503. 

  503. 		    /*		   SH	      ==> Hitachi SuperH	*/
    504. 

  504. 		    /* 			(LINUX & MSWINCE)		*/
    505. 

  505. 		    /* 		   X86_64     ==> AMD x86-64		*/
    506. 

  506. 		    /*		   POWERPC    ==> IBM/Apple PowerPC	*/
    507. 

  507. 		    /*			(MACOS(<=9),DARWIN(incl.MACOSX),*/
    508. 

  508. 		    /*			 LINUX, NETBSD, AIX, NOSYS	*/
    509. 

  509. 		    /*			 variants)			*/
    510. 

  510. 		    /*			Handles 32 and 64-bit variants.	*/
    511. 

  511. 		    /*		   CRIS       ==> Axis Etrax		*/
    512. 

  512. 		    /*		   M32R	      ==> Renesas M32R		*/
    513. 

  513. 

  514. 

  515. /*
    516. 

  516.  * For each architecture and OS, the following need to be defined:
    517. 

  517.  *
    518. 

  518.  * CPP_WORDSZ is a simple integer constant representing the word size.
    519. 

  519.  * in bits.  We assume byte addressibility, where a byte has 8 bits.
    520. 

  520.  * We also assume CPP_WORDSZ is either 32 or 64.
    521. 

  521.  * (We care about the length of pointers, not hardware
    522. 

  522.  * bus widths.  Thus a 64 bit processor with a C compiler that uses
    523. 

  523.  * 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)
    524. 

  524.  *
    525. 

  525.  * MACH_TYPE is a string representation of the machine type.
    526. 

  526.  * OS_TYPE is analogous for the OS.
    527. 

  527.  *
    528. 

  528.  * ALIGNMENT is the largest N, such that
    529. 

  529.  * all pointer are guaranteed to be aligned on N byte boundaries.
    530. 

  530.  * defining it to be 1 will always work, but perform poorly.
    531. 

  531.  *
    532. 

  532.  * DATASTART is the beginning of the data segment.
    533. 

  533.  * On some platforms SEARCH_FOR_DATA_START is defined.
    534. 

  534.  * SEARCH_FOR_DATASTART will cause GC_data_start to
    535. 

  535.  * be set to an address determined by accessing data backwards from _end
    536. 

  536.  * until an unmapped page is found.  DATASTART will be defined to be
    537. 

  537.  * GC_data_start.
    538. 

  538.  * On UNIX-like systems, the collector will scan the area between DATASTART
    539. 

  539.  * and DATAEND for root pointers.
    540. 

  540.  *
    541. 

  541.  * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.
    542. 

  542.  * RTH suggests gaining access to linker script synth'd values with
    543. 

  543.  * this idiom instead of `&end' where `end' is defined as ``extern int end;'' .
    544. 

  544.  * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g.,
    545. 

  545.  * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-*
    546. 

  546.  * without any special options.
    547. 

  547.  *
    548. 

  548.  * STACKBOTTOM is the cool end of the stack, which is usually the
    549. 

  549.  * highest address in the stack.
    550. 

  550.  * Under PCR or OS/2, we have other ways of finding thread stacks.
    551. 

  551.  * For each machine, the following should:
    552. 

  552.  * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
    553. 

  553.  * 2) define exactly one of
    554. 

  554.  *	STACKBOTTOM (should be defined to be an expression)
    555. 

  555.  *	LINUX_STACKBOTTOM
    556. 

  556.  *	HEURISTIC1
    557. 

  557.  *	HEURISTIC2
    558. 

  558.  * If STACKBOTTOM is defined, then it's value will be used directly as the
    559. 

  559.  * stack base.  If LINUX_STACKBOTTOM is defined, then it will be determined
    560. 

  560.  * with a method appropriate for most Linux systems.  Currently we look
    561. 

  561.  * first for __libc_stack_end (currently only id USE_LIBC_PRIVATES is
    562. 

  562.  * defined), and if that fails read it from /proc.  (If USE_LIBC_PRIVATES
    563. 

  563.  * is not defined and NO_PROC_STAT is defined, we revert to HEURISTIC2.)
    564. 

  564.  * If either of the last two macros are defined, then STACKBOTTOM is computed
    565. 

  565.  * during collector startup using one of the following two heuristics:
    566. 

  566.  * HEURISTIC1:  Take an address inside GC_init's frame, and round it up to
    567. 

  567.  *		the next multiple of STACK_GRAN.
    568. 

  568.  * HEURISTIC2:  Take an address inside GC_init's frame, increment it repeatedly
    569. 

  569.  *		in small steps (decrement if STACK_GROWS_UP), and read the value
    570. 

  570.  *		at each location.  Remember the value when the first
    571. 

  571.  *		Segmentation violation or Bus error is signalled.  Round that
    572. 

  572.  *		to the nearest plausible page boundary, and use that instead
    573. 

  573.  *		of STACKBOTTOM.
    574. 

  574.  *
    575. 

  575.  * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
    576. 

  576.  * the value of environ is a pointer that can serve as STACKBOTTOM.
    577. 

  577.  * I expect that HEURISTIC2 can be replaced by this approach, which
    578. 

  578.  * interferes far less with debugging.  However it has the disadvantage
    579. 

  579.  * that it's confused by a putenv call before the collector is initialized.
    580. 

  580.  * This could be dealt with by intercepting putenv ...
    581. 

  581.  *
    582. 

  582.  * If no expression for STACKBOTTOM can be found, and neither of the above
    583. 

  583.  * heuristics are usable, the collector can still be used with all of the above
    584. 

  584.  * undefined, provided one of the following is done:
    585. 

  585.  * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
    586. 

  586.  *    without reference to STACKBOTTOM.  This is appropriate for use in
    587. 

  587.  *    conjunction with thread packages, since there will be multiple stacks.
    588. 

  588.  *    (Allocating thread stacks in the heap, and treating them as ordinary
    589. 

  589.  *    heap data objects is also possible as a last resort.  However, this is
    590. 

  590.  *    likely to introduce significant amounts of excess storage retention
    591. 

  591.  *    unless the dead parts of the thread stacks are periodically cleared.)
    592. 

  592.  * 2) Client code may set GC_stackbottom before calling any GC_ routines.
    593. 

  593.  *    If the author of the client code controls the main program, this is
    594. 

  594.  *    easily accomplished by introducing a new main program, setting
    595. 

  595.  *    GC_stackbottom to the address of a local variable, and then calling
    596. 

  596.  *    the original main program.  The new main program would read something
    597. 

  597.  *    like:
    598. 

  598.  *
    599. 

  599.  *		# include "gc_private.h"
    600. 

  600.  *
    601. 

  601.  *		main(argc, argv, envp)
    602. 

  602.  *		int argc;
    603. 

  603.  *		char **argv, **envp;
    604. 

  604.  *		{
    605. 

  605.  *		    int dummy;
    606. 

  606.  *
    607. 

  607.  *		    GC_stackbottom = (ptr_t)(&dummy);
    608. 

  608.  *		    return(real_main(argc, argv, envp));
    609. 

  609.  *		}
    610. 

  610.  *
    611. 

  611.  *
    612. 

  612.  * Each architecture may also define the style of virtual dirty bit
    613. 

  613.  * implementation to be used:
    614. 

  614.  *   MPROTECT_VDB: Write protect the heap and catch faults.
    615. 

  615.  *   GWW_VDB: Use win32 GetWriteWatch primitive.
    616. 

  616.  *   PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
    617. 

  617.  *
    618. 

  618.  * The first and second one may be combined, in which case a runtime
    619. 

  619.  * selection will be made, based on GetWriteWatch availability.
    620. 

  620.  *
    621. 

  621.  * An architecture may define DYNAMIC_LOADING if dynamic_load.c
    622. 

  622.  * defined GC_register_dynamic_libraries() for the architecture.
    623. 

  623.  *
    624. 

  624.  * An architecture may define PREFETCH(x) to preload the cache with *x.
    625. 

  625.  * This defaults to a no-op.
    626. 

  626.  *
    627. 

  627.  * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
    628. 

  628.  *
    629. 

  629.  * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
    630. 

  630.  * clear the two words at GC_malloc-aligned address x.  By default,
    631. 

  631.  * word stores of 0 are used instead.
    632. 

  632.  *
    633. 

  633.  * HEAP_START may be defined as the initial address hint for mmap-based
    634. 

  634.  * allocation.
    635. 

  635.  */
    636. 

  636. 

  637. /* If we are using a recent version of gcc, we can use __builtin_unwind_init()
    638. 

  638.  * to push the relevant registers onto the stack.
    639. 

  639.  */
    640. 

  640. # if defined(__GNUC__) && ((__GNUC__ >= 3) || \
    641. 

  641. 			   (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) \
    642. 

  642. 		       && !defined(__INTEL_COMPILER) && !defined(__PATHCC__)
    643. 

  643. #   define HAVE_BUILTIN_UNWIND_INIT
    644. 

  644. # endif
    645. 

  645. 

  646. # define STACK_GRAN 0x1000000
    647. 

  647. # ifdef M68K
    648. 

  648. #   define MACH_TYPE "M68K"
    649. 

  649. #   define ALIGNMENT 2
    650. 

  650. #   ifdef OPENBSD
    651. 

  651. #	define OS_TYPE "OPENBSD"
    652. 

  652. #	define HEURISTIC2
    653. 

  653. #	ifdef __ELF__
    654. 

  654. #	  define DATASTART GC_data_start
    655. 

  655. #	  define DYNAMIC_LOADING
    656. 

  656. #	else
    657. 

  657. 	  extern char etext[];
    658. 

  658. #	  define DATASTART ((ptr_t)(etext))
    659. 

  659. #       endif
    660. 

  660. #   endif
    661. 

  661. #   ifdef NETBSD
    662. 

  662. #	define OS_TYPE "NETBSD"
    663. 

  663. #	define HEURISTIC2
    664. 

  664. #	ifdef __ELF__
    665. 

  665. #	  define DATASTART GC_data_start
    666. 

  666. #	  define DYNAMIC_LOADING
    667. 

  667. #	else
    668. 

  668. 	  extern char etext[];
    669. 

  669. #	  define DATASTART ((ptr_t)(etext))
    670. 

  670. #       endif
    671. 

  671. #   endif
    672. 

  672. #   ifdef LINUX
    673. 

  673. #       define OS_TYPE "LINUX"
    674. 

  674. #       define LINUX_STACKBOTTOM
    675. 

  675. #       define MPROTECT_VDB
    676. 

  676. #       ifdef __ELF__
    677. 

  677. #            define DYNAMIC_LOADING
    678. 

  678. #	     include <features.h>
    679. 

  679. #	     if defined(__GLIBC__)&& __GLIBC__>=2
    680. 

  680. #              define SEARCH_FOR_DATA_START
    681. 

  681. #	     else /* !GLIBC2 */
    682. 

  682.                extern char **__environ;
    683. 

  683. #              define DATASTART ((ptr_t)(&__environ))
    684. 

  684.                              /* hideous kludge: __environ is the first */
    685. 

  685.                              /* word in crt0.o, and delimits the start */
    686. 

  686.                              /* of the data segment, no matter which   */
    687. 

  687.                              /* ld options were passed through.        */
    688. 

  688.                              /* We could use _etext instead, but that  */
    689. 

  689.                              /* would include .rodata, which may       */
    690. 

  690.                              /* contain large read-only data tables    */
    691. 

  691.                              /* that we'd rather not scan.             */
    692. 

  692. #	     endif /* !GLIBC2 */
    693. 

  693.              extern int _end[];
    694. 

  694. #            define DATAEND (_end)
    695. 

  695. #       else
    696. 

  696.              extern int etext[];
    697. 

  697. #            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    698. 

  698. #       endif
    699. 

  699. #   endif
    700. 

  700. #   ifdef AMIGA
    701. 

  701. #	define OS_TYPE "AMIGA"
    702. 

  702.  	    	/* STACKBOTTOM and DATASTART handled specially	*/
    703. 

  703.  	    	/* in os_dep.c					*/
    704. 

  704. # 	define DATAEND	/* not needed */
    705. 

  705. #	define GETPAGESIZE() 4096
    706. 

  706. #   endif
    707. 

  707. #   ifdef MACOS
    708. 

  708. #     ifndef __LOWMEM__
    709. 

  709. #     include <LowMem.h>
    710. 

  710. #     endif
    711. 

  711. #     define OS_TYPE "MACOS"
    712. 

  712. 			/* see os_dep.c for details of global data segments. */
    713. 

  713. #     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
    714. 

  714. #     define DATAEND	/* not needed */
    715. 

  715. #     define GETPAGESIZE() 4096
    716. 

  716. #   endif
    717. 

  717. #   ifdef NEXT
    718. 

  718. #	define OS_TYPE "NEXT"
    719. 

  719. #	define DATASTART ((ptr_t) get_etext())
    720. 

  720. #	define STACKBOTTOM ((ptr_t) 0x4000000)
    721. 

  721. #	define DATAEND	/* not needed */
    722. 

  722. #   endif
    723. 

  723. # endif
    724. 

  724. 

  725. # if defined(POWERPC)
    726. 

  726. #   define MACH_TYPE "POWERPC"
    727. 

  727. #   ifdef MACOS
    728. 

  728. #     define ALIGNMENT 2  /* Still necessary?  Could it be 4?	*/
    729. 

  729. #     ifndef __LOWMEM__
    730. 

  730. #     include <LowMem.h>
    731. 

  731. #     endif
    732. 

  732. #     define OS_TYPE "MACOS"
    733. 

  733. 			/* see os_dep.c for details of global data segments. */
    734. 

  734. #     define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
    735. 

  735. #     define DATAEND  /* not needed */
    736. 

  736. #   endif
    737. 

  737. #   ifdef LINUX
    738. 

  738. #     if defined(__powerpc64__)
    739. 

  739. #       define ALIGNMENT 8
    740. 

  740. #       define CPP_WORDSZ 64
    741. 

  741. #       ifndef HBLKSIZE
    742. 

  742. #         define HBLKSIZE 4096
    743. 

  743. #       endif
    744. 

  744. #     else
    745. 

  745. #       define ALIGNMENT 4
    746. 

  746. #     endif
    747. 

  747. #     define OS_TYPE "LINUX"
    748. 

  748.       /* HEURISTIC1 has been reliably reported to fail for a 32-bit	*/
    749. 

  749.       /* executable on a 64 bit kernel.					*/
    750. 

  750. #     define LINUX_STACKBOTTOM
    751. 

  751. #     define DYNAMIC_LOADING
    752. 

  752. #     define SEARCH_FOR_DATA_START
    753. 

  753.       extern int _end[];
    754. 

  754. #     define DATAEND (_end)
    755. 

  755. #   endif
    756. 

  756. #   ifdef DARWIN
    757. 

  757. #     define OS_TYPE "DARWIN"
    758. 

  758. #     define DYNAMIC_LOADING
    759. 

  759. #     if defined(__ppc64__)
    760. 

  760. #       define ALIGNMENT 8
    761. 

  761. #       define CPP_WORDSZ 64
    762. 

  762. #       define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
    763. 

  763. #       define CACHE_LINE_SIZE 64
    764. 

  764. #       ifndef HBLKSIZE
    765. 

  765. #         define HBLKSIZE 4096
    766. 

  766. #       endif
    767. 

  767. #     else
    768. 

  768. #       define ALIGNMENT 4
    769. 

  769. #       define STACKBOTTOM ((ptr_t) 0xc0000000)
    770. 

  770. #     endif
    771. 

  771.       /* XXX: see get_end(3), get_etext() and get_end() should not be used.
    772. 

  772. 	 These aren't used when dyld support is enabled (it is by default) */
    773. 

  773. #     define DATASTART ((ptr_t) get_etext())
    774. 

  774. #     define DATAEND	((ptr_t) get_end())
    775. 

  775. #     define USE_MMAP
    776. 

  776. #     define USE_MMAP_ANON
    777. 

  777. #     ifdef GC_DARWIN_THREADS
    778. 

  778. #       define MPROTECT_VDB
    779. 

  779. #     endif
    780. 

  780. #     include <unistd.h>
    781. 

  781. #     define GETPAGESIZE() getpagesize()
    782. 

  782. #     if defined(USE_PPC_PREFETCH) && defined(__GNUC__)
    783. 

  783. 	/* The performance impact of prefetches is untested */
    784. 

  784. #	define PREFETCH(x) \
    785. 

  785. 	  __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))
    786. 

  786. #	define PREFETCH_FOR_WRITE(x) \
    787. 

  787. 	  __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))
    788. 

  788. #     endif
    789. 

  789.       /* There seems to be some issues with trylock hanging on darwin. This
    790. 

  790. 	 should be looked into some more */
    791. 

  791. #     define NO_PTHREAD_TRYLOCK
    792. 

  792. #   endif
    793. 

  793. #   ifdef FREEBSD
    794. 

  794. #       define ALIGNMENT 4
    795. 

  795. #       define OS_TYPE "FREEBSD"
    796. 

  796. #       ifndef GC_FREEBSD_THREADS
    797. 

  797. #           define MPROTECT_VDB
    798. 

  798. #       endif
    799. 

  799. #       define SIG_SUSPEND SIGUSR1
    800. 

  800. #       define SIG_THR_RESTART SIGUSR2
    801. 

  801. #       define FREEBSD_STACKBOTTOM
    802. 

  802. #       ifdef __ELF__
    803. 

  803. #           define DYNAMIC_LOADING
    804. 

  804. #       endif
    805. 

  805.         extern char etext[];
    806. 

  806.         extern char * GC_FreeBSDGetDataStart();
    807. 

  807. #       define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
    808. 

  808. #   endif
    809. 

  809. #   ifdef NETBSD
    810. 

  810. #     define ALIGNMENT 4
    811. 

  811. #     define OS_TYPE "NETBSD"
    812. 

  812. #     define HEURISTIC2
    813. 

  813.       extern char etext[];
    814. 

  814. #     define DATASTART GC_data_start
    815. 

  815. #     define DYNAMIC_LOADING
    816. 

  816. #   endif
    817. 

  817. #   ifdef AIX
    818. 

  818. #     define OS_TYPE "AIX"
    819. 

  819. #     undef ALIGNMENT /* in case it's defined	*/
    820. 

  820. #     ifdef IA64
    821. 

  821. #       undef IA64
    822. 

  822.           /* DOB: some AIX installs stupidly define IA64 in */
    823. 

  823.           /* /usr/include/sys/systemcfg.h   		    */
    824. 

  824. #     endif
    825. 

  825. #     ifdef __64BIT__
    826. 

  826. #       define ALIGNMENT 8
    827. 

  827. #       define CPP_WORDSZ 64
    828. 

  828. #       define STACKBOTTOM ((ptr_t)0x1000000000000000)
    829. 

  829. #     else
    830. 

  830. #       define ALIGNMENT 4
    831. 

  831. #       define CPP_WORDSZ 32
    832. 

  832. #       define STACKBOTTOM ((ptr_t)((ulong)&errno))
    833. 

  833. #     endif
    834. 

  834. #     define USE_MMAP
    835. 

  835. #     define USE_MMAP_ANON
    836. 

  836. 	/* From AIX linker man page:
    837. 

  837. 	_text Specifies the first location of the program.
    838. 

  838. 	_etext Specifies the first location after the program.
    839. 

  839. 	_data Specifies the first location of the data.
    840. 

  840. 	_edata Specifies the first location after the initialized data
    841. 

  841. 	_end or end Specifies the first location after all data.
    842. 

  842. 	*/
    843. 

  843.       extern int _data[], _end[];
    844. 

  844. #     define DATASTART ((ptr_t)((ulong)_data))
    845. 

  845. #     define DATAEND ((ptr_t)((ulong)_end))
    846. 

  846.       extern int errno;
    847. 

  847. #     define DYNAMIC_LOADING
    848. 

  848. 	/* For really old versions of AIX, this may have to be removed. */
    849. 

  849. #   endif
    850. 

  850. 

  851. #   ifdef NOSYS
    852. 

  852. #     define ALIGNMENT 4
    853. 

  853. #     define OS_TYPE "NOSYS"
    854. 

  854.       extern void __end[], __dso_handle[];
    855. 

  855. #     define DATASTART (__dso_handle)  /* OK, that's ugly.  */
    856. 

  856. #     define DATAEND (__end)
    857. 

  857. 	/* Stack starts at 0xE0000000 for the simulator.  */
    858. 

  858. #     undef STACK_GRAN
    859. 

  859. #     define STACK_GRAN 0x10000000
    860. 

  860. #     define HEURISTIC1
    861. 

  861. #   endif
    862. 

  862. # endif
    863. 

  863. 

  864. # ifdef VAX
    865. 

  865. #   define MACH_TYPE "VAX"
    866. 

  866. #   define ALIGNMENT 4	/* Pointers are longword aligned by 4.2 C compiler */
    867. 

  867.     extern char etext[];
    868. 

  868. #   define DATASTART ((ptr_t)(etext))
    869. 

  869. #   ifdef BSD
    870. 

  870. #	define OS_TYPE "BSD"
    871. 

  871. #	define HEURISTIC1
    872. 

  872. 			/* HEURISTIC2 may be OK, but it's hard to test. */
    873. 

  873. #   endif
    874. 

  874. #   ifdef ULTRIX
    875. 

  875. #	define OS_TYPE "ULTRIX"
    876. 

  876. #	define STACKBOTTOM ((ptr_t) 0x7fffc800)
    877. 

  877. #   endif
    878. 

  878. # endif
    879. 

  879. 

  880. # ifdef SPARC
    881. 

  881. #   define MACH_TYPE "SPARC"
    882. 

  882. #   if defined(__arch64__) || defined(__sparcv9)
    883. 

  883. #     define ALIGNMENT 8
    884. 

  884. #     define CPP_WORDSZ 64
    885. 

  885. #     define ELF_CLASS ELFCLASS64
    886. 

  886. #   else
    887. 

  887. #     define ALIGNMENT 4	/* Required by hardware	*/
    888. 

  888. #     define CPP_WORDSZ 32
    889. 

  889. #   endif
    890. 

  890.     /* Don't define USE_ASM_PUSH_REGS.  We do use an asm helper, but	*/
    891. 

  891.     /* not to push the registers on the mark stack.			*/
    892. 

  892. #   ifdef SOLARIS
    893. 

  893. #	define OS_TYPE "SOLARIS"
    894. 

  894. 	extern int _etext[];
    895. 

  895. 	extern int _end[];
    896. 

  896. 	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    897. 

  897. #       define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
    898. 

  898. #	define DATAEND (_end)
    899. 

  899. #	if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
    900. 

  900. #	    define USE_MMAP
    901. 

  901. 	    /* Otherwise we now use calloc.  Mmap may result in the	*/
    902. 

  902. 	    /* heap interleaved with thread stacks, which can result in	*/
    903. 

  903. 	    /* excessive blacklisting.  Sbrk is unusable since it	*/
    904. 

  904. 	    /* doesn't interact correctly with the system malloc.	*/
    905. 

  905. #	endif
    906. 

  906. #       ifdef USE_MMAP
    907. 

  907. #         define HEAP_START (ptr_t)0x40000000
    908. 

  908. #       else
    909. 

  909. #	  define HEAP_START DATAEND
    910. 

  910. #       endif
    911. 

  911. #	define PROC_VDB
    912. 

  912. /*	HEURISTIC1 reportedly no longer works under 2.7.  		*/
    913. 

  913. /*  	HEURISTIC2 probably works, but this appears to be preferable.	*/
    914. 

  914. /*	Apparently USRSTACK is defined to be USERLIMIT, but in some	*/
    915. 

  915. /* 	installations that's undefined.  We work around this with a	*/
    916. 

  916. /*	gross hack:							*/
    917. 

  917. #       include <sys/vmparam.h>
    918. 

  918. #	ifdef USERLIMIT
    919. 

  919. 	  /* This should work everywhere, but doesn't.	*/
    920. 

  920. #	  define STACKBOTTOM USRSTACK
    921. 

  921. #       else
    922. 

  922. #	  define HEURISTIC2
    923. 

  923. #       endif
    924. 

  924. #	include <unistd.h>
    925. 

  925. #       define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
    926. 

  926. 		/* getpagesize() appeared to be missing from at least one */
    927. 

  927. 		/* Solaris 5.4 installation.  Weird.			  */
    928. 

  928. #	define DYNAMIC_LOADING
    929. 

  929. #   endif
    930. 

  930. #   ifdef DRSNX
    931. 

  931. #	define OS_TYPE "DRSNX"
    932. 

  932. 	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    933. 

  933. 	extern int etext[];
    934. 

  934. #       define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)etext)
    935. 

  935. #	define MPROTECT_VDB
    936. 

  936. #       define STACKBOTTOM ((ptr_t) 0xdfff0000)
    937. 

  937. #	define DYNAMIC_LOADING
    938. 

  938. #   endif
    939. 

  939. #   ifdef LINUX
    940. 

  940. #     define OS_TYPE "LINUX"
    941. 

  941. #     ifdef __ELF__
    942. 

  942. #       define DYNAMIC_LOADING
    943. 

  943. #     else
    944. 

  944.           Linux Sparc/a.out not supported
    945. 

  945. #     endif
    946. 

  946.       extern int _end[];
    947. 

  947.       extern int _etext[];
    948. 

  948. #     define DATAEND (_end)
    949. 

  949. #     define SVR4
    950. 

  950.       extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    951. 

  951. #     ifdef __arch64__
    952. 

  952. #	define DATASTART GC_SysVGetDataStart(0x100000, (ptr_t)_etext)
    953. 

  953. #     else
    954. 

  954. #       define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
    955. 

  955. #     endif
    956. 

  956. #     define LINUX_STACKBOTTOM
    957. 

  957. #   endif
    958. 

  958. #   ifdef OPENBSD
    959. 

  959. #     define OS_TYPE "OPENBSD"
    960. 

  960. #     define STACKBOTTOM ((ptr_t) 0xf8000000)
    961. 

  961.       extern int etext[];
    962. 

  962. #     define DATASTART ((ptr_t)(etext))
    963. 

  963. #   endif
    964. 

  964. #   ifdef NETBSD
    965. 

  965. #     define OS_TYPE "NETBSD"
    966. 

  966. #     define HEURISTIC2
    967. 

  967. #     ifdef __ELF__
    968. 

  968. #	define DATASTART GC_data_start
    969. 

  969. #	define DYNAMIC_LOADING
    970. 

  970. #     else
    971. 

  971. 	extern char etext[];
    972. 

  972. #	define DATASTART ((ptr_t)(etext))
    973. 

  973. #     endif
    974. 

  974. #   endif
    975. 

  975. #   ifdef FREEBSD
    976. 

  976. #	define OS_TYPE "FREEBSD"
    977. 

  977. #	define SIG_SUSPEND SIGUSR1
    978. 

  978. #	define SIG_THR_RESTART SIGUSR2
    979. 

  979. #	define FREEBSD_STACKBOTTOM
    980. 

  980. #	ifdef __ELF__
    981. 

  981. #	    define DYNAMIC_LOADING
    982. 

  982. #	endif
    983. 

  983. 	extern char etext[];
    984. 

  984. 	extern char edata[];
    985. 

  985. 	extern char end[];
    986. 

  986. #	define NEED_FIND_LIMIT
    987. 

  987. #	define DATASTART ((ptr_t)(&etext))
    988. 

  988. #	define DATAEND (GC_find_limit (DATASTART, TRUE))
    989. 

  989. #	define DATASTART2 ((ptr_t)(&edata))
    990. 

  990. #	define DATAEND2 ((ptr_t)(&end))
    991. 

  991. #   endif
    992. 

  992. # endif
    993. 

  993. 

  994. # ifdef I386
    995. 

  995. #   define MACH_TYPE "I386"
    996. 

  996. #   if defined(__LP64__) || defined(_WIN64)
    997. 

  997. #     error This should be handled as X86_64
    998. 

  998. #   else
    999. 

  999. #     define CPP_WORDSZ 32
    1000. 

  1000. #     define ALIGNMENT 4
    1001. 

  1001. 			/* Appears to hold for all "32 bit" compilers	*/
    1002. 

  1002. 			/* except Borland.  The -a4 option fixes 	*/
    1003. 

  1003. 			/* Borland.					*/
    1004. 

  1004.                         /* Ivan Demakov: For Watcom the option is -zp4. */
    1005. 

  1005. #   endif
    1006. 

  1006. #   ifdef SEQUENT
    1007. 

  1007. #	define OS_TYPE "SEQUENT"
    1008. 

  1008. 	extern int etext[];
    1009. 

  1009. #       define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    1010. 

  1010. #       define STACKBOTTOM ((ptr_t) 0x3ffff000) 
    1011. 

  1011. #   endif
    1012. 

  1012. #   ifdef BEOS
    1013. 

  1013. #     define OS_TYPE "BEOS"
    1014. 

  1014. #     include <OS.h>
    1015. 

  1015. #     define GETPAGESIZE() B_PAGE_SIZE
    1016. 

  1016.       extern int etext[];
    1017. 

  1017. #     define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    1018. 

  1018. #   endif
    1019. 

  1019. #   ifdef SOLARIS
    1020. 

  1020. #	define OS_TYPE "SOLARIS"
    1021. 

  1021.         extern int _etext[], _end[];
    1022. 

  1022.   	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    1023. 

  1023. #       define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_etext)
    1024. 

  1024. #	define DATAEND (_end)
    1025. 

  1025. /*	# define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7,  	*/
    1026. 

  1026. /*      but reportedly breaks under 2.8.  It appears that the stack	*/
    1027. 

  1027. /* 	base is a property of the executable, so this should not break	*/
    1028. 

  1028. /* 	old executables.						*/
    1029. 

  1029. /*  	HEURISTIC2 probably works, but this appears to be preferable.	*/
    1030. 

  1030. #       include <sys/vm.h>
    1031. 

  1031. #	define STACKBOTTOM USRSTACK
    1032. 

  1032. /* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
    1033. 

  1033. /* It appears to be fixed in 2.8 and 2.9.				*/
    1034. 

  1034. #	ifdef SOLARIS25_PROC_VDB_BUG_FIXED
    1035. 

  1035. #	  define PROC_VDB
    1036. 

  1036. #	endif
    1037. 

  1037. #	define DYNAMIC_LOADING
    1038. 

  1038. #	if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
    1039. 

  1039. #	    define USE_MMAP
    1040. 

  1040. 	    /* Otherwise we now use calloc.  Mmap may result in the	*/
    1041. 

  1041. 	    /* heap interleaved with thread stacks, which can result in	*/
    1042. 

  1042. 	    /* excessive blacklisting.  Sbrk is unusable since it	*/
    1043. 

  1043. 	    /* doesn't interact correctly with the system malloc.	*/
    1044. 

  1044. #	endif
    1045. 

  1045. #       ifdef USE_MMAP
    1046. 

  1046. #         define HEAP_START (ptr_t)0x40000000
    1047. 

  1047. #       else
    1048. 

  1048. #	  define HEAP_START DATAEND
    1049. 

  1049. #       endif
    1050. 

  1050. #   endif
    1051. 

  1051. #   ifdef SCO
    1052. 

  1052. #	define OS_TYPE "SCO"
    1053. 

  1053. 	extern int etext[];
    1054. 

  1054. #   	define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
    1055. 

  1055. 				  & ~0x3fffff) \
    1056. 

  1056. 				 +((word)etext & 0xfff))
    1057. 

  1057. #	define STACKBOTTOM ((ptr_t) 0x7ffffffc)
    1058. 

  1058. #   endif
    1059. 

  1059. #   ifdef SCO_ELF
    1060. 

  1060. #       define OS_TYPE "SCO_ELF"
    1061. 

  1061.         extern int etext[];
    1062. 

  1062. #       define DATASTART ((ptr_t)(etext))
    1063. 

  1063. #       define STACKBOTTOM ((ptr_t) 0x08048000)
    1064. 

  1064. #       define DYNAMIC_LOADING
    1065. 

  1065. #	define ELF_CLASS ELFCLASS32
    1066. 

  1066. #   endif
    1067. 

  1067. #   ifdef DGUX
    1068. 

  1068. #	define OS_TYPE "DGUX"
    1069. 

  1069. 	extern int _etext, _end;
    1070. 

  1070. 	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    1071. 

  1071. #	define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)(&_etext))
    1072. 

  1072. #	define DATAEND (&_end)
    1073. 

  1073. #	define STACK_GROWS_DOWN
    1074. 

  1074. #	define HEURISTIC2
    1075. 

  1075. #	include <unistd.h>
    1076. 

  1076. #	define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
    1077. 

  1077. #	define DYNAMIC_LOADING
    1078. 

  1078. #	ifndef USE_MMAP
    1079. 

  1079. #	  define USE_MMAP
    1080. 

  1080. #	endif /* USE_MMAP */
    1081. 

  1081. #	define MAP_FAILED (void *) -1
    1082. 

  1082. #	ifdef USE_MMAP
    1083. 

  1083. #	  define HEAP_START (ptr_t)0x40000000
    1084. 

  1084. #	else /* USE_MMAP */
    1085. 

  1085. #	  define HEAP_START DATAEND
    1086. 

  1086. #	endif /* USE_MMAP */
    1087. 

  1087. #   endif /* DGUX */
    1088. 

  1088. 

  1089. #   ifdef LINUX
    1090. 

  1090. #	define OS_TYPE "LINUX"
    1091. 

  1091. #       define LINUX_STACKBOTTOM
    1092. 

  1092. 	/* On I386 Linux, enable HEURISTIC2 as a backup to /proc data	*/
    1093. 

  1093. 	/* for the case where /proc is missing or nobbled (grsec)	*/
    1094. 

  1094. #	define HEURISTIC2
    1095. 

  1095. #	if 0
    1096. 

  1096. #	  define HEURISTIC1
    1097. 

  1097. #         undef STACK_GRAN
    1098. 

  1098. #         define STACK_GRAN 0x10000000
    1099. 

  1099. 	  /* STACKBOTTOM is usually 0xc0000000, but this changes with	*/
    1100. 

  1100. 	  /* different kernel configurations.  In particular, systems	*/
    1101. 

  1101. 	  /* with 2GB physical memory will usually move the user	*/
    1102. 

  1102. 	  /* address space limit, and hence initial SP to 0x80000000.	*/
    1103. 

  1103. #       endif
    1104. 

  1104. #       if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
    1105. 

  1105. #	    define MPROTECT_VDB
    1106. 

  1106. #	else
    1107. 

  1107. 	    /* We seem to get random errors in incremental mode,	*/
    1108. 

  1108. 	    /* possibly because Linux threads is itself a malloc client */
    1109. 

  1109. 	    /* and can't deal with the signals.				*/
    1110. 

  1110. #	endif
    1111. 

  1111. #	define HEAP_START (ptr_t)0x1000
    1112. 

  1112. 		/* This encourages mmap to give us low addresses,	*/
    1113. 

  1113. 		/* thus allowing the heap to grow to ~3GB		*/
    1114. 

  1114. #       ifdef __ELF__
    1115. 

  1115. #            define DYNAMIC_LOADING
    1116. 

  1116. #	     ifdef UNDEFINED	/* includes ro data */
    1117. 

  1117. 	       extern int _etext[];
    1118. 

  1118. #              define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
    1119. 

  1119. #	     endif
    1120. 

  1120. #	     include <features.h>
    1121. 

  1121. #	     if defined(__GLIBC__) && __GLIBC__ >= 2
    1122. 

  1122. #		 define SEARCH_FOR_DATA_START
    1123. 

  1123. #	     else
    1124. 

  1124.      	         extern char **__environ;
    1125. 

  1125. #                define DATASTART ((ptr_t)(&__environ))
    1126. 

  1126. 			      /* hideous kludge: __environ is the first */
    1127. 

  1127. 			      /* word in crt0.o, and delimits the start */
    1128. 

  1128. 			      /* of the data segment, no matter which   */
    1129. 

  1129. 			      /* ld options were passed through.        */
    1130. 

  1130. 			      /* We could use _etext instead, but that  */
    1131. 

  1131. 			      /* would include .rodata, which may       */
    1132. 

  1132. 			      /* contain large read-only data tables    */
    1133. 

  1133. 			      /* that we'd rather not scan.		*/
    1134. 

  1134. #	     endif
    1135. 

  1135. 	     extern int _end[];
    1136. 

  1136. #	     define DATAEND (_end)
    1137. 

  1137. #	else
    1138. 

  1138. 	     extern int etext[];
    1139. 

  1139. #            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    1140. 

  1140. #       endif
    1141. 

  1141. #	ifdef USE_I686_PREFETCH
    1142. 

  1142. 	  /* FIXME: Thus should use __builtin_prefetch, but we'll leave that	*/
    1143. 

  1143. 	  /* for the next rtelease.						*/
    1144. 

  1144. #	  define PREFETCH(x) \
    1145. 

  1145. 	    __asm__ __volatile__ ("	prefetchnta	%0": : "m"(*(char *)(x)))
    1146. 

  1146. 	    /* Empirically prefetcht0 is much more effective at reducing	*/
    1147. 

  1147. 	    /* cache miss stalls for the targetted load instructions.  But it	*/
    1148. 

  1148. 	    /* seems to interfere enough with other cache traffic that the net	*/
    1149. 

  1149. 	    /* result is worse than prefetchnta.				*/
    1150. 

  1150. #         if 0 
    1151. 

  1151. 	    /* Using prefetches for write seems to have a slight negative	*/
    1152. 

  1152. 	    /* impact on performance, at least for a PIII/500.			*/
    1153. 

  1153. #	    define PREFETCH_FOR_WRITE(x) \
    1154. 

  1154. 	      __asm__ __volatile__ ("	prefetcht0	%0": : "m"(*(char *)(x)))
    1155. 

  1155. #	  endif
    1156. 

  1156. #	endif
    1157. 

  1157. #	ifdef USE_3DNOW_PREFETCH
    1158. 

  1158. #	  define PREFETCH(x) \
    1159. 

  1159. 	    __asm__ __volatile__ ("	prefetch	%0": : "m"(*(char *)(x)))
    1160. 

  1160. #	  define PREFETCH_FOR_WRITE(x) \
    1161. 

  1161. 	    __asm__ __volatile__ ("	prefetchw	%0": : "m"(*(char *)(x)))
    1162. 

  1162. #	endif
    1163. 

  1163. #   endif
    1164. 

  1164. #   ifdef CYGWIN32
    1165. 

  1165. #       define OS_TYPE "CYGWIN32"
    1166. 

  1166. #       define DATASTART ((ptr_t)GC_DATASTART)  /* From gc.h */
    1167. 

  1167. #       define DATAEND	 ((ptr_t)GC_DATAEND)
    1168. 

  1168. #	undef STACK_GRAN
    1169. 

  1169. #       define STACK_GRAN 0x10000
    1170. 

  1170. #       define HEURISTIC1
    1171. 

  1171. #   endif
    1172. 

  1172. #   ifdef OS2
    1173. 

  1173. #	define OS_TYPE "OS2"
    1174. 

  1174.  	    	/* STACKBOTTOM and DATASTART are handled specially in 	*/
    1175. 

  1175. 		/* os_dep.c. OS2 actually has the right			*/
    1176. 

  1176. 		/* system call!						*/
    1177. 

  1177. #	define DATAEND	/* not needed */
    1178. 

  1178. #   endif
    1179. 

  1179. #   ifdef MSWIN32
    1180. 

  1180. #	define OS_TYPE "MSWIN32"
    1181. 

  1181. 		/* STACKBOTTOM and DATASTART are handled specially in 	*/
    1182. 

  1182. 		/* os_dep.c.						*/
    1183. 

  1183. #       if !defined(__WATCOMC__)
    1184. 

  1184. #	  define MPROTECT_VDB
    1185. 

  1185. 	  /* We also avoided doing this in the past with GC_WIN32_THREADS */
    1186. 

  1186. 	  /* Hopefully that's fixed.					  */
    1187. 

  1187. #	endif
    1188. 

  1188. #	if _MSC_VER >= 1300  /* .NET, i.e. > VisualStudio 6	*/
    1189. 

  1189. #         define GWW_VDB
    1190. 

  1190. #	endif
    1191. 

  1191. #       define DATAEND  /* not needed */
    1192. 

  1192. #   endif
    1193. 

  1193. #   ifdef MSWINCE
    1194. 

  1194. #	define OS_TYPE "MSWINCE"
    1195. 

  1195. #       define DATAEND  /* not needed */
    1196. 

  1196. #   endif
    1197. 

  1197. #   ifdef DJGPP
    1198. 

  1198. #       define OS_TYPE "DJGPP"
    1199. 

  1199. #       include "stubinfo.h"
    1200. 

  1200.         extern int etext[];
    1201. 

  1201.         extern int _stklen;
    1202. 

  1202.         extern int __djgpp_stack_limit;
    1203. 

  1203. #       define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))
    1204. 

  1204. /* #       define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
    1205. 

  1205.                                                      + _stklen)) */
    1206. 

  1206. #       define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
    1207. 

  1207. 		/* This may not be right.  */
    1208. 

  1208. #   endif
    1209. 

  1209. #   ifdef OPENBSD
    1210. 

  1210. #	define OS_TYPE "OPENBSD"
    1211. 

  1211. #   endif
    1212. 

  1212. #   ifdef FREEBSD
    1213. 

  1213. #	define OS_TYPE "FREEBSD"
    1214. 

  1214. #	ifndef GC_FREEBSD_THREADS
    1215. 

  1215. #	    define MPROTECT_VDB
    1216. 

  1216. #	endif
    1217. 

  1217. #	ifdef __GLIBC__
    1218. 

  1218. #	    define SIG_SUSPEND		(32+6)
    1219. 

  1219. #	    define SIG_THR_RESTART	(32+5)
    1220. 

  1220. 	    extern int _end[];
    1221. 

  1221. #	    define DATAEND (_end)
    1222. 

  1222. #	else
    1223. 

  1223. #	    define SIG_SUSPEND SIGUSR1
    1224. 

  1224. #	    define SIG_THR_RESTART SIGUSR2
    1225. 

  1225. #	endif
    1226. 

  1226. #	define FREEBSD_STACKBOTTOM
    1227. 

  1227. #	ifdef __ELF__
    1228. 

  1228. #	    define DYNAMIC_LOADING
    1229. 

  1229. #	endif
    1230. 

  1230. 	extern char etext[];
    1231. 

  1231. 	extern char * GC_FreeBSDGetDataStart(size_t, ptr_t);
    1232. 

  1232. #	define DATASTART GC_FreeBSDGetDataStart(0x1000, (ptr_t)etext)
    1233. 

  1233. #   endif
    1234. 

  1234. #   ifdef NETBSD
    1235. 

  1235. #	define OS_TYPE "NETBSD"
    1236. 

  1236. #	ifdef __ELF__
    1237. 

  1237. #	    define DYNAMIC_LOADING
    1238. 

  1238. #	endif
    1239. 

  1239. #   endif
    1240. 

  1240. #   ifdef THREE86BSD
    1241. 

  1241. #	define OS_TYPE "THREE86BSD"
    1242. 

  1242. #   endif
    1243. 

  1243. #   ifdef BSDI
    1244. 

  1244. #	define OS_TYPE "BSDI"
    1245. 

  1245. #   endif
    1246. 

  1246. #   if defined(OPENBSD) || defined(NETBSD) \
    1247. 

  1247.         || defined(THREE86BSD) || defined(BSDI)
    1248. 

  1248. #	define HEURISTIC2
    1249. 

  1249. 	extern char etext[];
    1250. 

  1250. #	define DATASTART ((ptr_t)(etext))
    1251. 

  1251. #   endif
    1252. 

  1252. #   ifdef NEXT
    1253. 

  1253. #	define OS_TYPE "NEXT"
    1254. 

  1254. #	define DATASTART ((ptr_t) get_etext())
    1255. 

  1255. #	define STACKBOTTOM ((ptr_t)0xc0000000)
    1256. 

  1256. #	define DATAEND	/* not needed */
    1257. 

  1257. #   endif
    1258. 

  1258. #   ifdef DOS4GW
    1259. 

  1259. #     define OS_TYPE "DOS4GW"
    1260. 

  1260.       extern long __nullarea;
    1261. 

  1261.       extern char _end;
    1262. 

  1262.       extern char *_STACKTOP;
    1263. 

  1263.       /* Depending on calling conventions Watcom C either precedes
    1264. 

  1264.          or does not precedes with undescore names of C-variables.
    1265. 

  1265.          Make sure startup code variables always have the same names.  */
    1266. 

  1266.       #pragma aux __nullarea "*";
    1267. 

  1267.       #pragma aux _end "*";
    1268. 

  1268. #     define STACKBOTTOM ((ptr_t) _STACKTOP)
    1269. 

  1269.                          /* confused? me too. */
    1270. 

  1270. #     define DATASTART ((ptr_t) &__nullarea)
    1271. 

  1271. #     define DATAEND ((ptr_t) &_end)
    1272. 

  1272. #   endif
    1273. 

  1273. #   ifdef HURD
    1274. 

  1274. #     define OS_TYPE "HURD"
    1275. 

  1275. #     define STACK_GROWS_DOWN
    1276. 

  1276. #     define HEURISTIC2
    1277. 

  1277. #     define SIG_SUSPEND SIGUSR1
    1278. 

  1278. #     define SIG_THR_RESTART SIGUSR2
    1279. 

  1279. #     define SEARCH_FOR_DATA_START
    1280. 

  1280.       extern int _end[];
    1281. 

  1281. #     define DATAEND ((ptr_t) (_end))
    1282. 

  1282. /* #     define MPROTECT_VDB  Not quite working yet? */
    1283. 

  1283. #     define DYNAMIC_LOADING
    1284. 

  1284. #   endif
    1285. 

  1285. #   ifdef DARWIN
    1286. 

  1286. #     define OS_TYPE "DARWIN"
    1287. 

  1287. #     define DARWIN_DONT_PARSE_STACK
    1288. 

  1288. #     define DYNAMIC_LOADING
    1289. 

  1289.       /* XXX: see get_end(3), get_etext() and get_end() should not be used.
    1290. 

  1290. 	 These aren't used when dyld support is enabled (it is by default) */
    1291. 

  1291. #     define DATASTART ((ptr_t) get_etext())
    1292. 

  1292. #     define DATAEND	((ptr_t) get_end())
    1293. 

  1293. #     define STACKBOTTOM ((ptr_t) 0xc0000000)
    1294. 

  1294. #     define USE_MMAP
    1295. 

  1295. #     define USE_MMAP_ANON
    1296. 

  1296. #     ifdef GC_DARWIN_THREADS
    1297. 

  1297. #       define MPROTECT_VDB
    1298. 

  1298. #     endif
    1299. 

  1299. #     include <unistd.h>
    1300. 

  1300. #     define GETPAGESIZE() getpagesize()
    1301. 

  1301.       /* There seems to be some issues with trylock hanging on darwin. This
    1302. 

  1302. 	 should be looked into some more */
    1303. 

  1303. #      define NO_PTHREAD_TRYLOCK
    1304. 

  1304. #   endif /* DARWIN */
    1305. 

  1305. # endif
    1306. 

  1306. 

  1307. # ifdef NS32K
    1308. 

  1308. #   define MACH_TYPE "NS32K"
    1309. 

  1309. #   define ALIGNMENT 4
    1310. 

  1310.     extern char **environ;
    1311. 

  1311. #   define DATASTART ((ptr_t)(&environ))
    1312. 

  1312. 			      /* hideous kludge: environ is the first   */
    1313. 

  1313. 			      /* word in crt0.o, and delimits the start */
    1314. 

  1314. 			      /* of the data segment, no matter which   */
    1315. 

  1315. 			      /* ld options were passed through.        */
    1316. 

  1316. #   define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
    1317. 

  1317. # endif
    1318. 

  1318. 

  1319. # ifdef MIPS
    1320. 

  1320. #   define MACH_TYPE "MIPS"
    1321. 

  1321. #   ifdef LINUX
    1322. 

  1322.       /* This was developed for a linuxce style platform.  Probably	*/
    1323. 

  1323.       /* needs to be tweaked for workstation class machines.		*/
    1324. 

  1324. #     define OS_TYPE "LINUX"
    1325. 

  1325. #     define DYNAMIC_LOADING
    1326. 

  1326.       extern int _end[];
    1327. 

  1327. #     define DATAEND (_end)
    1328. 

  1328.       extern int __data_start[];
    1329. 

  1329. #     define DATASTART ((ptr_t)(__data_start))
    1330. 

  1330. #     ifdef _MIPS_SZPTR
    1331. 

  1331. #	define CPP_WORDSZ _MIPS_SZPTR
    1332. 

  1332. #	define ALIGNMENT (_MIPS_SZPTR/8)
    1333. 

  1333. #     else
    1334. 

  1334. #	define ALIGNMENT 4
    1335. 

  1335. #     endif
    1336. 

  1336. #     if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
    1337. 

  1337. #        define LINUX_STACKBOTTOM
    1338. 

  1338. #     else
    1339. 

  1339. #        define STACKBOTTOM 0x80000000
    1340. 

  1340. #     endif
    1341. 

  1341. #   endif /* Linux */
    1342. 

  1342. #   ifdef EWS4800
    1343. 

  1343. #      define HEURISTIC2
    1344. 

  1344. #      if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
    1345. 

  1345.          extern int _fdata[], _end[];
    1346. 

  1346. #        define DATASTART ((ptr_t)_fdata)
    1347. 

  1347. #        define DATAEND ((ptr_t)_end)
    1348. 

  1348. #        define CPP_WORDSZ _MIPS_SZPTR
    1349. 

  1349. #        define ALIGNMENT (_MIPS_SZPTR/8)
    1350. 

  1350. #      else
    1351. 

  1351.          extern int etext[], edata[], end[];
    1352. 

  1352.          extern int _DYNAMIC_LINKING[], _gp[];
    1353. 

  1353. #        define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \
    1354. 

  1354.                + ((word)etext & 0xffff)))
    1355. 

  1355. #        define DATAEND (edata)
    1356. 

  1356. #        define DATASTART2 (_DYNAMIC_LINKING \
    1357. 

  1357.                ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
    1358. 

  1358.                : (ptr_t)edata)
    1359. 

  1359. #        define DATAEND2 (end)
    1360. 

  1360. #        define ALIGNMENT 4
    1361. 

  1361. #      endif
    1362. 

  1362. #      define OS_TYPE "EWS4800"
    1363. 

  1363. #   endif
    1364. 

  1364. #   ifdef ULTRIX
    1365. 

  1365. #	define HEURISTIC2
    1366. 

  1366. #       define DATASTART (ptr_t)0x10000000
    1367. 

  1367. 			      /* Could probably be slightly higher since */
    1368. 

  1368. 			      /* startup code allocates lots of stuff.   */
    1369. 

  1369. #	define OS_TYPE "ULTRIX"
    1370. 

  1370. #       define ALIGNMENT 4
    1371. 

  1371. #   endif
    1372. 

  1372. #   ifdef IRIX5
    1373. 

  1373. #	define HEURISTIC2
    1374. 

  1374.         extern int _fdata[];
    1375. 

  1375. #       define DATASTART ((ptr_t)(_fdata))
    1376. 

  1376. #       ifdef USE_MMAP
    1377. 

  1377. #         define HEAP_START (ptr_t)0x30000000
    1378. 

  1378. #       else
    1379. 

  1379. #	  define HEAP_START DATASTART
    1380. 

  1380. #       endif
    1381. 

  1381. 			      /* Lowest plausible heap address.		*/
    1382. 

  1382. 			      /* In the MMAP case, we map there.	*/
    1383. 

  1383. 			      /* In either case it is used to identify	*/
    1384. 

  1384. 			      /* heap sections so they're not 		*/
    1385. 

  1385. 			      /* considered as roots.			*/
    1386. 

  1386. #	define OS_TYPE "IRIX5"
    1387. 

  1387. /*#       define MPROTECT_VDB DOB: this should work, but there is evidence */
    1388. 

  1388. /* 	  	of recent breakage.					   */
    1389. 

  1389. #       ifdef _MIPS_SZPTR
    1390. 

  1390. #	  define CPP_WORDSZ _MIPS_SZPTR
    1391. 

  1391. #	  define ALIGNMENT (_MIPS_SZPTR/8)
    1392. 

  1392. #	else
    1393. 

  1393. #         define ALIGNMENT 4
    1394. 

  1394. #	endif
    1395. 

  1395. #	define DYNAMIC_LOADING
    1396. 

  1396. #   endif
    1397. 

  1397. #   ifdef MSWINCE
    1398. 

  1398. #       define OS_TYPE "MSWINCE"
    1399. 

  1399. #       define ALIGNMENT 4
    1400. 

  1400. #       define DATAEND /* not needed */
    1401. 

  1401. #   endif
    1402. 

  1402. #   if defined(NETBSD)
    1403. 

  1403. #     define OS_TYPE "NETBSD"
    1404. 

  1404. #     define ALIGNMENT 4
    1405. 

  1405. #     define HEURISTIC2
    1406. 

  1406. #     ifdef __ELF__
    1407. 

  1407.         extern int etext[];
    1408. 

  1408. #       define DATASTART GC_data_start
    1409. 

  1409. #       define NEED_FIND_LIMIT
    1410. 

  1410. #       define DYNAMIC_LOADING
    1411. 

  1411. #     else
    1412. 

  1412. #       define DATASTART ((ptr_t) 0x10000000)
    1413. 

  1413. #       define STACKBOTTOM ((ptr_t) 0x7ffff000)
    1414. 

  1414. #     endif /* _ELF_ */
    1415. 

  1415. #  endif
    1416. 

  1416. #  if defined(NONSTOP)
    1417. 

  1417. #    define CPP_WORDSZ 32
    1418. 

  1418. #    define OS_TYPE "NONSTOP"
    1419. 

  1419. #    define ALIGNMENT 4
    1420. 

  1420. #    define DATASTART ((ptr_t) 0x08000000)
    1421. 

  1421.      extern char **environ;
    1422. 

  1422. #    define DATAEND ((ptr_t)(environ - 0x10))
    1423. 

  1423. #    define STACKBOTTOM ((ptr_t) 0x4fffffff)
    1424. 

  1424. #   endif
    1425. 

  1425. # endif
    1426. 

  1426. 

  1427. # ifdef HP_PA
    1428. 

  1428. #   define MACH_TYPE "HP_PA"
    1429. 

  1429. #   ifdef __LP64__
    1430. 

  1430. #     define CPP_WORDSZ 64
    1431. 

  1431. #     define ALIGNMENT 8
    1432. 

  1432. #   else
    1433. 

  1433. #     define CPP_WORDSZ 32
    1434. 

  1434. #     define ALIGNMENT 4
    1435. 

  1435. #   endif
    1436. 

  1436. #   if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)
    1437. 

  1437. #     ifndef LINUX /* For now. */
    1438. 

  1438. #       define MPROTECT_VDB
    1439. 

  1439. #     endif
    1440. 

  1440. #   else
    1441. 

  1441. #     ifdef PARALLEL_MARK
    1442. 

  1442. #	define USE_MARK_BYTES
    1443. 

  1443. 		/* Minimize compare-and-swap usage.		*/
    1444. 

  1444. #     endif
    1445. 

  1445. #   endif
    1446. 

  1446. #   define STACK_GROWS_UP
    1447. 

  1447. #   ifdef HPUX
    1448. 

  1448. #     define OS_TYPE "HPUX"
    1449. 

  1449.       extern int __data_start[];
    1450. 

  1450. #     define DATASTART ((ptr_t)(__data_start))
    1451. 

  1451. #     if 0
    1452. 

  1452. 	/* The following appears to work for 7xx systems running HP/UX	*/
    1453. 

  1453. 	/* 9.xx Furthermore, it might result in much faster		*/
    1454. 

  1454. 	/* collections than HEURISTIC2, which may involve scanning	*/
    1455. 

  1455. 	/* segments that directly precede the stack.  It is not the	*/
    1456. 

  1456. 	/* default, since it may not work on older machine/OS		*/
    1457. 

  1457. 	/* combinations. (Thanks to Raymond X.T. Nijssen for uncovering	*/
    1458. 

  1458. 	/* this.)							*/
    1459. 

  1459. #       define STACKBOTTOM ((ptr_t) 0x7b033000)  /* from /etc/conf/h/param.h */
    1460. 

  1460. #     else
    1461. 

  1461. 	/* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2	*/
    1462. 

  1462. 	/* to this.  Note that the GC must be initialized before the	*/
    1463. 

  1463.     	/* first putenv call.						*/
    1464. 

  1464. 	extern char ** environ;
    1465. 

  1465. #       define STACKBOTTOM ((ptr_t)environ)
    1466. 

  1466. #     endif
    1467. 

  1467. #     define DYNAMIC_LOADING
    1468. 

  1468. #     include <unistd.h>
    1469. 

  1469. #     define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
    1470. 

  1470. #     ifndef __GNUC__
    1471. 

  1471. #       define PREFETCH(x)  { \
    1472. 

  1472.                               register long addr = (long)(x); \
    1473. 

  1473.                               (void) _asm ("LDW", 0, 0, addr, 0); \
    1474. 

  1474.                             }
    1475. 

  1475. #     endif
    1476. 

  1476. #   endif /* HPUX */
    1477. 

  1477. #   ifdef LINUX
    1478. 

  1478. #     define OS_TYPE "LINUX"
    1479. 

  1479. #     define LINUX_STACKBOTTOM
    1480. 

  1480. #     define DYNAMIC_LOADING
    1481. 

  1481. #     define SEARCH_FOR_DATA_START
    1482. 

  1482.       extern int _end[];
    1483. 

  1483. #     define DATAEND (&_end)
    1484. 

  1484. #   endif /* LINUX */
    1485. 

  1485. # endif /* HP_PA */
    1486. 

  1486. 

  1487. # ifdef ALPHA
    1488. 

  1488. #   define MACH_TYPE "ALPHA"
    1489. 

  1489. #   define ALIGNMENT 8
    1490. 

  1490. #   define CPP_WORDSZ 64
    1491. 

  1491. #   ifdef NETBSD
    1492. 

  1492. #	define OS_TYPE "NETBSD"
    1493. 

  1493. #	define HEURISTIC2
    1494. 

  1494. #	define DATASTART GC_data_start
    1495. 

  1495. #	define ELFCLASS32 32
    1496. 

  1496. #	define ELFCLASS64 64
    1497. 

  1497. #	define ELF_CLASS ELFCLASS64
    1498. 

  1498. #       define DYNAMIC_LOADING
    1499. 

  1499. #   endif
    1500. 

  1500. #   ifdef OPENBSD
    1501. 

  1501. #	define OS_TYPE "OPENBSD"
    1502. 

  1502. #	define HEURISTIC2
    1503. 

  1503. #   	ifdef __ELF__	/* since OpenBSD/Alpha 2.9 */
    1504. 

  1504. #	   define DATASTART GC_data_start
    1505. 

  1505. #   	   define ELFCLASS32 32
    1506. 

  1506. #   	   define ELFCLASS64 64
    1507. 

  1507. #   	   define ELF_CLASS ELFCLASS64
    1508. 

  1508. #       else		/* ECOFF, until OpenBSD/Alpha 2.7 */
    1509. 

  1509. #   	   define DATASTART ((ptr_t) 0x140000000)
    1510. 

  1510. #   	endif
    1511. 

  1511. #   endif
    1512. 

  1512. #   ifdef FREEBSD
    1513. 

  1513. #	define OS_TYPE "FREEBSD"
    1514. 

  1514. /* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
    1515. 

  1515. #	define SIG_SUSPEND SIGUSR1
    1516. 

  1516. #	define SIG_THR_RESTART SIGUSR2
    1517. 

  1517. #	define FREEBSD_STACKBOTTOM
    1518. 

  1518. #	ifdef __ELF__
    1519. 

  1519. #	    define DYNAMIC_LOADING
    1520. 

  1520. #	endif
    1521. 

  1521. /* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
    1522. 

  1522. 	extern char etext[];
    1523. 

  1523. 	extern char edata[];
    1524. 

  1524. 	extern char end[];
    1525. 

  1525. #	define NEED_FIND_LIMIT
    1526. 

  1526. #	define DATASTART ((ptr_t)(&etext))
    1527. 

  1527. #	define DATAEND (GC_find_limit (DATASTART, TRUE))
    1528. 

  1528. #	define DATASTART2 ((ptr_t)(&edata))
    1529. 

  1529. #	define DATAEND2 ((ptr_t)(&end))
    1530. 

  1530. #   endif
    1531. 

  1531. #   ifdef OSF1
    1532. 

  1532. #	define OS_TYPE "OSF1"
    1533. 

  1533. #   	define DATASTART ((ptr_t) 0x140000000)
    1534. 

  1534. 	extern int _end[];
    1535. 

  1535. #   	define DATAEND ((ptr_t) &_end)
    1536. 

  1536.  	extern char ** environ;
    1537. 

  1537. 	/* round up from the value of environ to the nearest page boundary */
    1538. 

  1538. 	/* Probably breaks if putenv is called before collector 	   */
    1539. 

  1539. 	/* initialization.						   */
    1540. 

  1540. #	define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
    1541. 

  1541. /* #   	define HEURISTIC2 */
    1542. 

  1542. 	/* Normally HEURISTIC2 is too conervative, since		*/
    1543. 

  1543. 	/* the text segment immediately follows the stack.		*/
    1544. 

  1544. 	/* Hence we give an upper pound.				*/
    1545. 

  1545. 	/* This is currently unused, since we disabled HEURISTIC2	*/
    1546. 

  1546.     	extern int __start[];
    1547. 

  1547. #   	define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
    1548. 

  1548. #	ifndef GC_OSF1_THREADS
    1549. 

  1549. 	  /* Unresolved signal issues with threads.	*/
    1550. 

  1550. #   	  define MPROTECT_VDB
    1551. 

  1551. #       endif
    1552. 

  1552. #   	define DYNAMIC_LOADING
    1553. 

  1553. #   endif
    1554. 

  1554. #   ifdef LINUX
    1555. 

  1555. #       define OS_TYPE "LINUX"
    1556. 

  1556. #       define LINUX_STACKBOTTOM
    1557. 

  1557. #       ifdef __ELF__
    1558. 

  1558. #	  define SEARCH_FOR_DATA_START
    1559. 

  1559. #         define DYNAMIC_LOADING
    1560. 

  1560. #       else
    1561. 

  1561. #           define DATASTART ((ptr_t) 0x140000000)
    1562. 

  1562. #       endif
    1563. 

  1563. 	extern int _end[];
    1564. 

  1564. #	define DATAEND (_end)
    1565. 

  1565. #	define MPROTECT_VDB
    1566. 

  1566. 		/* Has only been superficially tested.  May not	*/
    1567. 

  1567. 		/* work on all versions.			*/
    1568. 

  1568. #   endif
    1569. 

  1569. # endif
    1570. 

  1570. 

  1571. # ifdef IA64
    1572. 

  1572. #   define MACH_TYPE "IA64"
    1573. 

  1573. #   ifdef HPUX
    1574. 

  1574. #	ifdef _ILP32
    1575. 

  1575. #	  define CPP_WORDSZ 32
    1576. 

  1576. 	    /* Requires 8 byte alignment for malloc */
    1577. 

  1577. #   	  define ALIGNMENT 4
    1578. 

  1578. #       else
    1579. 

  1579. #	  ifndef _LP64
    1580. 

  1580. 		---> unknown ABI
    1581. 

  1581. #         endif
    1582. 

  1582. #	  define CPP_WORDSZ 64
    1583. 

  1583. 	    /* Requires 16 byte alignment for malloc */
    1584. 

  1584. #         define ALIGNMENT 8
    1585. 

  1585. #       endif
    1586. 

  1586. #       define OS_TYPE "HPUX"	
    1587. 

  1587.         extern int __data_start[];
    1588. 

  1588. #       define DATASTART ((ptr_t)(__data_start))
    1589. 

  1589.         /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2	*/
    1590. 

  1590.         /* to this.  Note that the GC must be initialized before the	*/
    1591. 

  1591.     	/* first putenv call.						*/
    1592. 

  1592. 	extern char ** environ;
    1593. 

  1593. #       define STACKBOTTOM ((ptr_t)environ)
    1594. 

  1594. #       define HPUX_STACKBOTTOM
    1595. 

  1595. #       define DYNAMIC_LOADING
    1596. 

  1596. #       include <unistd.h>
    1597. 

  1597. #       define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
    1598. 

  1598.  	/* The following was empirically determined, and is probably	*/
    1599. 

  1599. 	/* not very robust.						*/
    1600. 

  1600. 	/* Note that the backing store base seems to be at a nice 	*/
    1601. 

  1601. 	/* address minus one page.					*/
    1602. 

  1602. #	define BACKING_STORE_DISPLACEMENT 0x1000000
    1603. 

  1603. #	define BACKING_STORE_ALIGNMENT 0x1000
    1604. 

  1604. 	extern ptr_t GC_register_stackbottom;
    1605. 

  1605. #	define BACKING_STORE_BASE GC_register_stackbottom
    1606. 

  1606. 	/* Known to be wrong for recent HP/UX versions!!!	*/
    1607. 

  1607. #   endif
    1608. 

  1608. #   ifdef LINUX
    1609. 

  1609. #   	define CPP_WORDSZ 64
    1610. 

  1610. #   	define ALIGNMENT 8
    1611. 

  1611. #       define OS_TYPE "LINUX"
    1612. 

  1612. 	/* The following works on NUE and older kernels:	*/
    1613. 

  1613. /* #       define STACKBOTTOM ((ptr_t) 0xa000000000000000l)	*/
    1614. 

  1614. 	/* This does not work on NUE:				*/
    1615. 

  1615. #       define LINUX_STACKBOTTOM
    1616. 

  1616. 	/* We also need the base address of the register stack	*/
    1617. 

  1617. 	/* backing store.  This is computed in 			*/
    1618. 

  1618. 	/* GC_linux_register_stack_base based on the following	*/
    1619. 

  1619. 	/* constants:						*/
    1620. 

  1620. #       define BACKING_STORE_ALIGNMENT 0x100000
    1621. 

  1621. #       define BACKING_STORE_DISPLACEMENT 0x80000000
    1622. 

  1622. 	extern ptr_t GC_register_stackbottom;
    1623. 

  1623. #	define BACKING_STORE_BASE GC_register_stackbottom
    1624. 

  1624. #	define SEARCH_FOR_DATA_START
    1625. 

  1625. #	ifdef __GNUC__
    1626. 

  1626. #         define DYNAMIC_LOADING
    1627. 

  1627. #	else
    1628. 

  1628. 	  /* In the Intel compiler environment, we seem to end up with  */
    1629. 

  1629. 	  /* statically linked executables and an undefined reference	*/
    1630. 

  1630. 	  /* to _DYNAMIC						*/
    1631. 

  1631. #  	endif
    1632. 

  1632. #	define MPROTECT_VDB
    1633. 

  1633. 		/* Requires Linux 2.3.47 or later.	*/
    1634. 

  1634. 	extern int _end[];
    1635. 

  1635. #	define DATAEND (_end)
    1636. 

  1636. #       ifdef __GNUC__
    1637. 

  1637. #	  ifndef __INTEL_COMPILER
    1638. 

  1638. #	    define PREFETCH(x) \
    1639. 

  1639. 	      __asm__ ("	lfetch	[%0]": : "r"(x))
    1640. 

  1640. #	    define PREFETCH_FOR_WRITE(x) \
    1641. 

  1641. 	      __asm__ ("	lfetch.excl	[%0]": : "r"(x))
    1642. 

  1642. #	    define CLEAR_DOUBLE(x) \
    1643. 

  1643. 	      __asm__ ("	stf.spill	[%0]=f0": : "r"((void *)(x)))
    1644. 

  1644. #	  else
    1645. 

  1645. #           include <ia64intrin.h>
    1646. 

  1646. #	    define PREFETCH(x) \
    1647. 

  1647. 	      __lfetch(__lfhint_none, (x))
    1648. 

  1648. #	    define PREFETCH_FOR_WRITE(x) \
    1649. 

  1649. 	      __lfetch(__lfhint_nta,  (x))
    1650. 

  1650. #	    define CLEAR_DOUBLE(x) \
    1651. 

  1651. 	      __stf_spill((void *)(x), 0)
    1652. 

  1652. #	  endif // __INTEL_COMPILER
    1653. 

  1653. #       endif
    1654. 

  1654. #   endif
    1655. 

  1655. #   ifdef MSWIN32
    1656. 

  1656.       /* FIXME: This is a very partial guess.  There is no port, yet.	*/
    1657. 

  1657. #     define OS_TYPE "MSWIN32"
    1658. 

  1658. 		/* STACKBOTTOM and DATASTART are handled specially in 	*/
    1659. 

  1659. 		/* os_dep.c.						*/
    1660. 

  1660. #     define DATAEND  /* not needed */
    1661. 

  1661. #     if defined(_WIN64)
    1662. 

  1662. #       define CPP_WORDSZ 64
    1663. 

  1663. #     else
    1664. 

  1664. #       define CPP_WORDSZ 32   /* Is this possible?	*/
    1665. 

  1665. #     endif
    1666. 

  1666. #     define ALIGNMENT 8
    1667. 

  1667. #     define STRTOULL _strtoui64
    1668. 

  1668. #   endif
    1669. 

  1669. # endif
    1670. 

  1670. 

  1671. # ifdef M88K
    1672. 

  1672. #   define MACH_TYPE "M88K"
    1673. 

  1673. #   define ALIGNMENT 4
    1674. 

  1674.     extern int etext[];
    1675. 

  1675. #   ifdef CX_UX
    1676. 

  1676. #	define OS_TYPE "CX_UX"
    1677. 

  1677. #       define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
    1678. 

  1678. #   endif
    1679. 

  1679. #   ifdef  DGUX
    1680. 

  1680. #	define OS_TYPE "DGUX"
    1681. 

  1681. 	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    1682. 

  1682. #       define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)etext)
    1683. 

  1683. #   endif
    1684. 

  1684. #   define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
    1685. 

  1685. # endif
    1686. 

  1686. 

  1687. # ifdef S370
    1688. 

  1688.     /* If this still works, and if anyone cares, this should probably	*/
    1689. 

  1689.     /* be moved to the S390 category.					*/
    1690. 

  1690. #   define MACH_TYPE "S370"
    1691. 

  1691. #   define ALIGNMENT 4	/* Required by hardware	*/
    1692. 

  1692. #   ifdef UTS4
    1693. 

  1693. #       define OS_TYPE "UTS4"
    1694. 

  1694. 	extern int etext[];
    1695. 

  1695. 	extern int _etext[];
    1696. 

  1696. 	extern int _end[];
    1697. 

  1697. 	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    1698. 

  1698. #       define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext)
    1699. 

  1699. #	define DATAEND (_end)
    1700. 

  1700. #	define HEURISTIC2
    1701. 

  1701. #   endif
    1702. 

  1702. # endif
    1703. 

  1703. 

  1704. # ifdef S390
    1705. 

  1705. #   define MACH_TYPE "S390"
    1706. 

  1706. #   ifndef __s390x__
    1707. 

  1707. #   define ALIGNMENT 4
    1708. 

  1708. #   define CPP_WORDSZ 32
    1709. 

  1709. #   else
    1710. 

  1710. #   define ALIGNMENT 8
    1711. 

  1711. #   define CPP_WORDSZ 64
    1712. 

  1712. #   ifndef HBLKSIZE
    1713. 

  1713. #     define HBLKSIZE 4096
    1714. 

  1714. #   endif
    1715. 

  1715. #   endif
    1716. 

  1716. #   ifdef LINUX
    1717. 

  1717. #       define OS_TYPE "LINUX"
    1718. 

  1718. #       define LINUX_STACKBOTTOM
    1719. 

  1719. #       define DYNAMIC_LOADING
    1720. 

  1720. 	extern int __data_start[];
    1721. 

  1721. #       define DATASTART ((ptr_t)(__data_start))
    1722. 

  1722.     extern int _end[];
    1723. 

  1723. #   define DATAEND (_end)
    1724. 

  1724. #   define CACHE_LINE_SIZE 256
    1725. 

  1725. #   define GETPAGESIZE() 4096
    1726. 

  1726. #   endif
    1727. 

  1727. # endif
    1728. 

  1728. 

  1729. # ifdef ARM32
    1730. 

  1730. #   define CPP_WORDSZ 32
    1731. 

  1731. #   define MACH_TYPE "ARM32"
    1732. 

  1732. #   define ALIGNMENT 4
    1733. 

  1733. #   ifdef NETBSD
    1734. 

  1734. #       define OS_TYPE "NETBSD"
    1735. 

  1735. #       define HEURISTIC2
    1736. 

  1736. #	ifdef __ELF__
    1737. 

  1737. #          define DATASTART GC_data_start
    1738. 

  1738. #	   define DYNAMIC_LOADING
    1739. 

  1739. #	else
    1740. 

  1740.            extern char etext[];
    1741. 

  1741. #          define DATASTART ((ptr_t)(etext))
    1742. 

  1742. #	endif
    1743. 

  1743. #   endif
    1744. 

  1744. #   ifdef LINUX
    1745. 

  1745. #       define OS_TYPE "LINUX"
    1746. 

  1746. #       define LINUX_STACKBOTTOM
    1747. 

  1747. #       undef STACK_GRAN
    1748. 

  1748. #       define STACK_GRAN 0x10000000
    1749. 

  1749. #       ifdef __ELF__
    1750. 

  1750. #            define DYNAMIC_LOADING
    1751. 

  1751. #	     include <features.h>
    1752. 

  1752. #	     if defined(__GLIBC__) && __GLIBC__ >= 2
    1753. 

  1753. #		 define SEARCH_FOR_DATA_START
    1754. 

  1754. #	     else
    1755. 

  1755.      	         extern char **__environ;
    1756. 

  1756. #                define DATASTART ((ptr_t)(&__environ))
    1757. 

  1757. 			      /* hideous kludge: __environ is the first */
    1758. 

  1758. 			      /* word in crt0.o, and delimits the start */
    1759. 

  1759. 			      /* of the data segment, no matter which   */
    1760. 

  1760. 			      /* ld options were passed through.        */
    1761. 

  1761. 			      /* We could use _etext instead, but that  */
    1762. 

  1762. 			      /* would include .rodata, which may       */
    1763. 

  1763. 			      /* contain large read-only data tables    */
    1764. 

  1764. 			      /* that we'd rather not scan.		*/
    1765. 

  1765. #	     endif
    1766. 

  1766. 	     extern int _end[];
    1767. 

  1767. #	     define DATAEND (_end)
    1768. 

  1768. #	else
    1769. 

  1769. 	     extern int etext[];
    1770. 

  1770. #            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    1771. 

  1771. #       endif
    1772. 

  1772. #   endif
    1773. 

  1773. #   ifdef MSWINCE
    1774. 

  1774. #     define OS_TYPE "MSWINCE"
    1775. 

  1775. #     define DATAEND /* not needed */
    1776. 

  1776. #   endif
    1777. 

  1777. #   ifdef NOSYS
    1778. 

  1778.       /* __data_start is usually defined in the target linker script.  */
    1779. 

  1779.       extern int __data_start[];
    1780. 

  1780. #     define DATASTART (ptr_t)(__data_start)
    1781. 

  1781.       /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S  */
    1782. 

  1782.       extern void *__stack_base__;
    1783. 

  1783. #     define STACKBOTTOM ((ptr_t) (__stack_base__))
    1784. 

  1784. #   endif
    1785. 

  1785. #endif
    1786. 

  1786. 

  1787. # ifdef CRIS
    1788. 

  1788. #   define MACH_TYPE "CRIS"
    1789. 

  1789. #   define CPP_WORDSZ 32
    1790. 

  1790. #   define ALIGNMENT 1
    1791. 

  1791. #   define OS_TYPE "LINUX"
    1792. 

  1792. #   define DYNAMIC_LOADING
    1793. 

  1793. #   define LINUX_STACKBOTTOM
    1794. 

  1794. #   define SEARCH_FOR_DATA_START
    1795. 

  1795.       extern int _end[];
    1796. 

  1796. #   define DATAEND (_end)
    1797. 

  1797. # endif
    1798. 

  1798. 

  1799. # ifdef SH
    1800. 

  1800. #   define MACH_TYPE "SH"
    1801. 

  1801. #   define ALIGNMENT 4
    1802. 

  1802. #   ifdef MSWINCE
    1803. 

  1803. #     define OS_TYPE "MSWINCE"
    1804. 

  1804. #     define DATAEND /* not needed */
    1805. 

  1805. #   endif
    1806. 

  1806. #   ifdef LINUX
    1807. 

  1807. #     define OS_TYPE "LINUX"
    1808. 

  1808. #     define LINUX_STACKBOTTOM
    1809. 

  1809. #     define DYNAMIC_LOADING
    1810. 

  1810. #     define SEARCH_FOR_DATA_START
    1811. 

  1811.       extern int _end[];
    1812. 

  1812. #     define DATAEND (_end)
    1813. 

  1813. #   endif
    1814. 

  1814. #   ifdef NETBSD
    1815. 

  1815. #      define OS_TYPE "NETBSD"
    1816. 

  1816. #      define HEURISTIC2
    1817. 

  1817. #      define DATASTART GC_data_start
    1818. 

  1818. #      define DYNAMIC_LOADING
    1819. 

  1819. #   endif
    1820. 

  1820. # endif
    1821. 

  1821.  
    1822. 

  1822. # ifdef SH4
    1823. 

  1823. #   define MACH_TYPE "SH4"
    1824. 

  1824. #   define OS_TYPE "MSWINCE"
    1825. 

  1825. #   define ALIGNMENT 4
    1826. 

  1826. #   define DATAEND /* not needed */
    1827. 

  1827. # endif
    1828. 

  1828. 

  1829. # ifdef M32R
    1830. 

  1830. #   define CPP_WORDSZ 32
    1831. 

  1831. #   define MACH_TYPE "M32R"
    1832. 

  1832. #   define ALIGNMENT 4
    1833. 

  1833. #   ifdef LINUX
    1834. 

  1834. #     define OS_TYPE "LINUX"
    1835. 

  1835. #     define LINUX_STACKBOTTOM
    1836. 

  1836. #     undef STACK_GRAN
    1837. 

  1837. #     define STACK_GRAN 0x10000000
    1838. 

  1838. #     define DYNAMIC_LOADING
    1839. 

  1839. #     define SEARCH_FOR_DATA_START
    1840. 

  1840.       extern int _end[];
    1841. 

  1841. #     define DATAEND (_end)
    1842. 

  1842. #   endif
    1843. 

  1843. # endif
    1844. 

  1844. 

  1845. # ifdef X86_64
    1846. 

  1846. #   define MACH_TYPE "X86_64"
    1847. 

  1847. #   define ALIGNMENT 8
    1848. 

  1848. #   define CPP_WORDSZ 64
    1849. 

  1849. #   ifndef HBLKSIZE
    1850. 

  1850. #     define HBLKSIZE 4096
    1851. 

  1851. #   endif
    1852. 

  1852. #   define CACHE_LINE_SIZE 64
    1853. 

  1853. #   ifdef LINUX
    1854. 

  1854. #	define OS_TYPE "LINUX"
    1855. 

  1855. #       define LINUX_STACKBOTTOM
    1856. 

  1856. 	/* On x86_64 Linux, enable HEURISTIC2 as a backup to /proc data	*/
    1857. 

  1857. 	/* for the case where /proc is missing or nobbled (grsec)	*/
    1858. 

  1858. #	define HEURISTIC2
    1859. 

  1859. #       if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
    1860. 

  1860. #	    define MPROTECT_VDB
    1861. 

  1861. #	else
    1862. 

  1862. 	    /* We seem to get random errors in incremental mode,	*/
    1863. 

  1863. 	    /* possibly because Linux threads is itself a malloc client */
    1864. 

  1864. 	    /* and can't deal with the signals.				*/
    1865. 

  1865. #	endif
    1866. 

  1866. #       ifdef __ELF__
    1867. 

  1867. #            define DYNAMIC_LOADING
    1868. 

  1868. #	     ifdef UNDEFINED	/* includes ro data */
    1869. 

  1869. 	       extern int _etext[];
    1870. 

  1870. #              define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
    1871. 

  1871. #	     endif
    1872. 

  1872. #	     include <features.h>
    1873. 

  1873. #	     define SEARCH_FOR_DATA_START
    1874. 

  1874. 	     extern int _end[];
    1875. 

  1875. #	     define DATAEND (_end)
    1876. 

  1876. #	else
    1877. 

  1877. 	     extern int etext[];
    1878. 

  1878. #            define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
    1879. 

  1879. #       endif
    1880. 

  1880. #       if defined(__GNUC__) && __GNUC__ >= 3
    1881. 

  1881. #	    define PREFETCH(x) __builtin_prefetch((x), 0, 0)
    1882. 

  1882. #	    define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1)
    1883. 

  1883. #	endif
    1884. 

  1884. #   endif
    1885. 

  1885. #   ifdef DARWIN
    1886. 

  1886. #     define OS_TYPE "DARWIN"
    1887. 

  1887. #     define DARWIN_DONT_PARSE_STACK
    1888. 

  1888. #     define DYNAMIC_LOADING
    1889. 

  1889.       /* XXX: see get_end(3), get_etext() and get_end() should not be used.
    1890. 

  1890. 	 These aren't used when dyld support is enabled (it is by default) */
    1891. 

  1891. #     define DATASTART ((ptr_t) get_etext())
    1892. 

  1892. #     define DATAEND	((ptr_t) get_end())
    1893. 

  1893. #     define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
    1894. 

  1894. #     define USE_MMAP
    1895. 

  1895. #     define USE_MMAP_ANON
    1896. 

  1896. #     ifdef GC_DARWIN_THREADS
    1897. 

  1897. #       define MPROTECT_VDB
    1898. 

  1898. #     endif
    1899. 

  1899. #     include <unistd.h>
    1900. 

  1900. #     define GETPAGESIZE() getpagesize()
    1901. 

  1901.       /* There seems to be some issues with trylock hanging on darwin. This
    1902. 

  1902. 	 should be looked into some more */
    1903. 

  1903. #     define NO_PTHREAD_TRYLOCK
    1904. 

  1904. #   endif
    1905. 

  1905. #   ifdef FREEBSD
    1906. 

  1906. #	define OS_TYPE "FREEBSD"
    1907. 

  1907. #	ifndef GC_FREEBSD_THREADS
    1908. 

  1908. #	    define MPROTECT_VDB
    1909. 

  1909. #	endif
    1910. 

  1910. #	ifdef __GLIBC__
    1911. 

  1911. #	    define SIG_SUSPEND		(32+6)
    1912. 

  1912. #	    define SIG_THR_RESTART	(32+5)
    1913. 

  1913. 	    extern int _end[];
    1914. 

  1914. #	    define DATAEND (_end)
    1915. 

  1915. #	else
    1916. 

  1916. #	    define SIG_SUSPEND SIGUSR1
    1917. 

  1917. #	    define SIG_THR_RESTART SIGUSR2
    1918. 

  1918. #	endif
    1919. 

  1919. #	define FREEBSD_STACKBOTTOM
    1920. 

  1920. #	ifdef __ELF__
    1921. 

  1921. #	    define DYNAMIC_LOADING
    1922. 

  1922. #	endif
    1923. 

  1923. 	extern char etext[];
    1924. 

  1924. 	extern char * GC_FreeBSDGetDataStart();
    1925. 

  1925. #	define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
    1926. 

  1926. #   endif
    1927. 

  1927. #   ifdef NETBSD
    1928. 

  1928. #	define OS_TYPE "NETBSD"
    1929. 

  1929. #	ifdef __ELF__
    1930. 

  1930. #	    define DYNAMIC_LOADING
    1931. 

  1931. #	endif
    1932. 

  1932. #	define HEURISTIC2
    1933. 

  1933. 	extern char etext[];
    1934. 

  1934. #	define SEARCH_FOR_DATA_START
    1935. 

  1935. #   endif
    1936. 

  1936. #   ifdef SOLARIS
    1937. 

  1937. #	define OS_TYPE "SOLARIS"
    1938. 

  1938. #	define ELF_CLASS ELFCLASS64
    1939. 

  1939.         extern int _etext[], _end[];
    1940. 

  1940.   	extern ptr_t GC_SysVGetDataStart(size_t, ptr_t);
    1941. 

  1941. #       define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_etext)
    1942. 

  1942. #	define DATAEND (_end)
    1943. 

  1943. /*	# define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7,  	*/
    1944. 

  1944. /*      but reportedly breaks under 2.8.  It appears that the stack	*/
    1945. 

  1945. /* 	base is a property of the executable, so this should not break	*/
    1946. 

  1946. /* 	old executables.						*/
    1947. 

  1947. /*  	HEURISTIC2 probably works, but this appears to be preferable.	*/
    1948. 

  1948. /*	Apparently USRSTACK is defined to be USERLIMIT, but in some	*/
    1949. 

  1949. /* 	installations that's undefined.  We work around this with a	*/
    1950. 

  1950. /*	gross hack:							*/
    1951. 

  1951. #       include <sys/vmparam.h>
    1952. 

  1952. #	ifdef USERLIMIT
    1953. 

  1953. 	  /* This should work everywhere, but doesn't.	*/
    1954. 

  1954. #	  define STACKBOTTOM USRSTACK
    1955. 

  1955. #       else
    1956. 

  1956. #	  define HEURISTIC2
    1957. 

  1957. #       endif
    1958. 

  1958. /* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
    1959. 

  1959. /* It appears to be fixed in 2.8 and 2.9.				*/
    1960. 

  1960. #	ifdef SOLARIS25_PROC_VDB_BUG_FIXED
    1961. 

  1961. #	  define PROC_VDB
    1962. 

  1962. #	endif
    1963. 

  1963. #	define DYNAMIC_LOADING
    1964. 

  1964. #	if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
    1965. 

  1965. #	    define USE_MMAP
    1966. 

  1966. 	    /* Otherwise we now use calloc.  Mmap may result in the	*/
    1967. 

  1967. 	    /* heap interleaved with thread stacks, which can result in	*/
    1968. 

  1968. 	    /* excessive blacklisting.  Sbrk is unusable since it	*/
    1969. 

  1969. 	    /* doesn't interact correctly with the system malloc.	*/
    1970. 

  1970. #	endif
    1971. 

  1971. #       ifdef USE_MMAP
    1972. 

  1972. #         define HEAP_START (ptr_t)0x40000000
    1973. 

  1973. #       else
    1974. 

  1974. #	  define HEAP_START DATAEND
    1975. 

  1975. #       endif
    1976. 

  1976. #   endif
    1977. 

  1977. #   ifdef MSWIN32
    1978. 

  1978. #	define OS_TYPE "MSWIN32"
    1979. 

  1979. 		/* STACKBOTTOM and DATASTART are handled specially in 	*/
    1980. 

  1980. 		/* os_dep.c.						*/
    1981. 

  1981. #       if !defined(__WATCOMC__)
    1982. 

  1982. #	  define MPROTECT_VDB
    1983. 

  1983. 	  /* We also avoided doing this in the past with GC_WIN32_THREADS */
    1984. 

  1984. 	  /* Hopefully that's fixed.					  */
    1985. 

  1985. #	endif
    1986. 

  1986. #	if _MSC_VER >= 1300  /* .NET, i.e. > VisualStudio 6	*/
    1987. 

  1987. #         define GWW_VDB
    1988. 

  1988. #	endif
    1989. 

  1989. #       define DATAEND  /* not needed */
    1990. 

  1990. #   endif
    1991. 

  1991. # endif
    1992. 

  1992. 

  1993. #if defined(LINUX_STACKBOTTOM) && defined(NO_PROC_STAT) \
    1994. 

  1994.     && !defined(USE_LIBC_PRIVATES)
    1995. 

  1995.     /* This combination will fail, since we have no way to get	*/
    1996. 

  1996.     /* the stack base.	Use HEURISTIC2 instead.			*/
    1997. 

  1997. #   undef LINUX_STACKBOTTOM
    1998. 

  1998. #   define HEURISTIC2
    1999. 

  1999.     /* This may still fail on some architectures like IA64.	*/
    2000. 

  2000.     /* We tried ...						*/
    2001. 

  2001. #endif
    2002. 

  2002. 

  2003. #if defined(LINUX) && defined(USE_MMAP)
    2004. 

  2004.     /* The kernel may do a somewhat better job merging mappings etc.	*/
    2005. 

  2005.     /* with anonymous mappings.						*/
    2006. 

  2006. #   define USE_MMAP_ANON
    2007. 

  2007. #endif
    2008. 

  2008. 

  2009. #if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
    2010. 

  2010.     /* Nptl allocates thread stacks with mmap, which is fine.  But it	*/
    2011. 

  2011.     /* keeps a cache of thread stacks.  Thread stacks contain the	*/
    2012. 

  2012.     /* thread control blocks.  These in turn contain a pointer to	*/
    2013. 

  2013.     /* (sizeof (void *) from the beginning of) the dtv for thread-local	*/
    2014. 

  2014.     /* storage, which is calloc allocated.  If we don't scan the cached	*/
    2015. 

  2015.     /* thread stacks, we appear to lose the dtv.  This tends to		*/
    2016. 

  2016.     /* result in something that looks like a bogus dtv count, which	*/
    2017. 

  2017.     /* tends to result in a memset call on a block that is way too	*/
    2018. 

  2018.     /* large.  Sometimes we're lucky and the process just dies ...	*/
    2019. 

  2019.     /* There seems to be a similar issue with some other memory 	*/
    2020. 

  2020.     /* allocated by the dynamic loader.					*/
    2021. 

  2021.     /* This should be avoidable by either:				*/
    2022. 

  2022.     /* - Defining USE_PROC_FOR_LIBRARIES here.				*/
    2023. 

  2023.     /*   That performs very poorly, precisely because we end up 	*/
    2024. 

  2024.     /*   scanning cached stacks.					*/
    2025. 

  2025.     /* - Have calloc look at its callers.  				*/
    2026. 

  2026.     /*   In spite of the fact that it is gross and disgusting.		*/
    2027. 

  2027.     /* In fact neither seems to suffice, probably in part because 	*/
    2028. 

  2028.     /* even with USE_PROC_FOR_LIBRARIES, we don't scan parts of stack	*/
    2029. 

  2029.     /* segments that appear to be out of bounds.  Thus we actually	*/
    2030. 

  2030.     /* do both, which seems to yield the best results.			*/
    2031. 

  2031. 

  2032. #   define USE_PROC_FOR_LIBRARIES
    2033. 

  2033. #endif
    2034. 

  2034. 

  2035. # ifndef STACK_GROWS_UP
    2036. 

  2036. #   define STACK_GROWS_DOWN
    2037. 

  2037. # endif
    2038. 

  2038. 

  2039. # ifndef CPP_WORDSZ
    2040. 

  2040. #   define CPP_WORDSZ 32
    2041. 

  2041. # endif
    2042. 

  2042. 

  2043. # ifndef OS_TYPE
    2044. 

  2044. #   define OS_TYPE ""
    2045. 

  2045. # endif
    2046. 

  2046. 

  2047. # ifndef DATAEND
    2048. 

  2048.     extern int end[];
    2049. 

  2049. #   define DATAEND (end)
    2050. 

  2050. # endif
    2051. 

  2051. 

  2052. # if defined(SVR4) && !defined(GETPAGESIZE)
    2053. 

  2053. #    include <unistd.h>
    2054. 

  2054. #    define GETPAGESIZE()  sysconf(_SC_PAGESIZE)
    2055. 

  2055. # endif
    2056. 

  2056. 

  2057. # ifndef GETPAGESIZE
    2058. 

  2058. #   if defined(SOLARIS) || defined(IRIX5) || defined(LINUX) \
    2059. 

  2059.        || define
    2060.