data.c 7.2 KB

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  1. /*
  2. Data access
  3. */
  4. /* $Header$ */
  5. #include <em_abs.h>
  6. #include "logging.h"
  7. #include "nofloat.h"
  8. #include "global.h"
  9. #include "log.h"
  10. #include "trap.h"
  11. #include "warn.h"
  12. #include "alloc.h"
  13. #include "memdirect.h"
  14. #include "mem.h"
  15. #include "shadow.h"
  16. #define HEAPSIZE 1000L /* initial heap size */
  17. extern size maxheap; /* from main.c */
  18. #ifdef LOGGING
  19. char *data_sh; /* shadowbytes */
  20. #endif LOGGING
  21. PRIVATE warn_dtbits();
  22. init_data(hb)
  23. ptr hb;
  24. {
  25. HB = hb; /* set Heap Base */
  26. HP = HB; /* initialize Heap Pointer */
  27. HL = HB + HEAPSIZE; /* initialize Heap Limit */
  28. data = Malloc((size)p2i(HL), "data space");
  29. #ifdef LOGGING
  30. data_sh = Malloc((size)p2i(HL), "shadowspace for data");
  31. dt_clear_area(i2p(0), HL);
  32. #endif LOGGING
  33. }
  34. /********************************************************
  35. * EM-register division. *
  36. ********************************************************
  37. * *
  38. * newHP(p) - check and adjust HeapPointer. *
  39. * *
  40. ********************************************************/
  41. newHP(ap)
  42. ptr ap;
  43. {
  44. register ptr p = ap;
  45. if (in_gda(p)) {
  46. wtrap(WHPGDA, EHEAP);
  47. }
  48. if (in_stack(p)) {
  49. wtrap(WHPSTACK, EHEAP);
  50. }
  51. if (!is_aligned(p, wsize)) {
  52. wtrap(WHPODD, EHEAP);
  53. }
  54. if (maxheap) {
  55. /* more than allowed on command line */
  56. if (p - HB > maxheap) {
  57. warning(WEHEAP);
  58. trap(EHEAP);
  59. }
  60. }
  61. if (p > HL) {
  62. /* extend heap space */
  63. HL = i2p(allocfrac(p2i(p)) - 1);
  64. data = Realloc(data, (size)(p2i(HL) + 1), "heap space");
  65. #ifdef LOGGING
  66. data_sh = Realloc(data_sh, (size)(p2i(HL) + 1),
  67. "shadowspace for heap");
  68. #endif LOGGING
  69. }
  70. #ifdef LOGGING
  71. if (p > HP) {
  72. dt_clear_area(HP, p);
  73. }
  74. #endif LOGGING
  75. HP = p;
  76. }
  77. /************************************************************************
  78. * Data store division. *
  79. ************************************************************************
  80. * *
  81. * dt_stdp(addr, p) - STore Data Pointer. *
  82. * dt_stn(addr, l, n) - STore N byte integer. *
  83. * dt_stf(addr, f, n) - STore n byte Floating point number. *
  84. * *
  85. ************************************************************************/
  86. dt_stdp(addr, ap)
  87. ptr addr, ap;
  88. {
  89. register int i;
  90. register long p = (long) ap;
  91. LOG(("@g6 dt_stdp(%lu, %lu)", addr, p));
  92. ch_in_data(addr, psize);
  93. ch_aligned(addr, wsize);
  94. for (i = 0; i < (int) psize; i++) {
  95. ch_dt_prot(addr + i);
  96. data_loc(addr + i) = (char) (p);
  97. dt_dp(addr + i);
  98. p = p>>8;
  99. }
  100. }
  101. dt_stip(addr, ap)
  102. ptr addr, ap;
  103. {
  104. register int i;
  105. register long p = (long) ap;
  106. LOG(("@g6 dt_stip(%lu, %lu)", addr, p));
  107. ch_in_data(addr, psize);
  108. ch_aligned(addr, wsize);
  109. for (i = 0; i < (int) psize; i++) {
  110. ch_dt_prot(addr + i);
  111. data_loc(addr + i) = (char) (p);
  112. dt_ip(addr + i);
  113. p = p>>8;
  114. }
  115. }
  116. dt_stn(addr, al, n)
  117. ptr addr;
  118. long al;
  119. size n;
  120. {
  121. register int i;
  122. register long l = al;
  123. LOG(("@g6 dt_stn(%lu, %lu, %lu)", addr, l, n));
  124. ch_in_data(addr, n);
  125. ch_aligned(addr, n);
  126. for (i = 0; i < (int) n; i++) {
  127. ch_dt_prot(addr + i);
  128. data_loc(addr + i) = (char) l;
  129. #ifdef LOGGING
  130. if (al == 0 && n == psize) {
  131. /* a psize zero, ambiguous */
  132. dt_sh(addr + i) = (SH_INT|SH_DATAP);
  133. }
  134. else {
  135. dt_sh(addr + i) = SH_INT;
  136. }
  137. #endif LOGGING
  138. l = l>>8;
  139. }
  140. }
  141. #ifndef NOFLOAT
  142. dt_stf(addr, f, n)
  143. ptr addr;
  144. double f;
  145. size n;
  146. {
  147. register char *cp = (char *) &f;
  148. register int i;
  149. LOG(("@g6 dt_stf(%lu, %g, %lu)", addr, f, n));
  150. ch_in_data(addr, n);
  151. ch_aligned(addr, wsize);
  152. for (i = 0; i < (int) n; i++) {
  153. ch_dt_prot(addr + i);
  154. data_loc(addr + i) = *cp++;
  155. dt_fl(addr + i);
  156. }
  157. }
  158. #endif NOFLOAT
  159. /************************************************************************
  160. * Data load division. *
  161. ************************************************************************
  162. * *
  163. * dt_lddp(addr) - LoaD Data Pointer from data. *
  164. * dt_ldip(addr) - LoaD Instruction Pointer from data. *
  165. * dt_ldu(addr, n) - LoaD n Unsigned bytes from data. *
  166. * dt_lds(addr, n) - LoaD n Signed bytes from data. *
  167. * *
  168. ************************************************************************/
  169. ptr dt_lddp(addr)
  170. ptr addr;
  171. {
  172. register ptr p;
  173. LOG(("@g6 dt_lddp(%lu)", addr));
  174. ch_in_data(addr, psize);
  175. ch_aligned(addr, wsize);
  176. #ifdef LOGGING
  177. if (!is_dt_set(addr, psize, SH_DATAP)) {
  178. warning(WGDPEXP);
  179. warn_dtbits(addr, psize);
  180. }
  181. #endif LOGGING
  182. p = p_in_data(addr);
  183. LOG(("@g6 dt_lddp() returns %lu", p));
  184. return (p);
  185. }
  186. ptr dt_ldip(addr)
  187. ptr addr;
  188. {
  189. register ptr p;
  190. LOG(("@g6 dt_ldip(%lu)", addr));
  191. ch_in_data(addr, psize);
  192. ch_aligned(addr, wsize);
  193. #ifdef LOGGING
  194. if (!is_dt_set(addr, psize, SH_INSP)) {
  195. warning(WGIPEXP);
  196. warn_dtbits(addr, psize);
  197. }
  198. #endif LOGGING
  199. p = p_in_data(addr);
  200. LOG(("@g6 dt_ldip() returns %lu", p));
  201. return (p);
  202. }
  203. unsigned long dt_ldu(addr, n)
  204. ptr addr;
  205. size n;
  206. {
  207. register int i;
  208. register unsigned long u = 0;
  209. LOG(("@g6 dt_ldu(%lu, %lu)", addr, n));
  210. ch_in_data(addr, n);
  211. ch_aligned(addr, n);
  212. #ifdef LOGGING
  213. if (!is_dt_set(addr, n, SH_INT)) {
  214. warning(n == 1 ? WGCEXP : WGIEXP);
  215. warn_dtbits(addr, n);
  216. }
  217. #endif LOGGING
  218. for (i = (int) n-1; i >= 0; i--) {
  219. u = (u<<8) | btou(data_loc(addr + i));
  220. }
  221. LOG(("@g6 dt_ldu() returns %lu", u));
  222. return (u);
  223. }
  224. long dt_lds(addr, n)
  225. ptr addr;
  226. size n;
  227. {
  228. register int i;
  229. register long l;
  230. LOG(("@g6 dt_lds(%lu, %lu)", addr, n));
  231. ch_in_data(addr, n);
  232. ch_aligned(addr, n);
  233. #ifdef LOGGING
  234. if (!is_dt_set(addr, n, SH_INT)) {
  235. warning(n == 1 ? WGCEXP : WGIEXP);
  236. warn_dtbits(addr, n);
  237. }
  238. #endif LOGGING
  239. l = btos(data_loc(addr + n - 1));
  240. for (i = n - 2; i >= 0; i--) {
  241. l = (l<<8) | btol(data_loc(addr + i));
  242. }
  243. LOG(("@g6 dt_lds() returns %lu", l));
  244. return (l);
  245. }
  246. /************************************************************************
  247. * Data move division *
  248. ************************************************************************
  249. * *
  250. * dt_mvd(d2, d1, n) - Move n bytes in data from d1 to d2. *
  251. * dt_mvs(d, s, n) - Move n bytes from s in stack to d in data. *
  252. * *
  253. * See st_mvs() in stack.c for a description. *
  254. * *
  255. ************************************************************************/
  256. dt_mvd(d2, d1, n) /* d1 -> d2 */
  257. ptr d2, d1;
  258. size n;
  259. {
  260. register int i;
  261. ch_in_data(d1, n);
  262. ch_aligned(d1, wsize);
  263. ch_in_data(d2, n);
  264. ch_aligned(d2, wsize);
  265. for (i = 0; i < (int) n; i++) {
  266. ch_dt_prot(d2 + i);
  267. data_loc(d2 + i) = data_loc(d1 + i);
  268. #ifdef LOGGING
  269. dt_sh(d2 + i) = dt_sh(d1 + i) & ~SH_PROT;
  270. #endif LOGGING
  271. }
  272. }
  273. dt_mvs(d, s, n) /* s -> d */
  274. ptr d, s;
  275. size n;
  276. {
  277. register int i;
  278. ch_in_stack(s, n);
  279. ch_aligned(s, wsize);
  280. ch_in_data(d, n);
  281. ch_aligned(d, wsize);
  282. for (i = 0; i < (int) n; i++) {
  283. ch_dt_prot(d + i);
  284. ch_st_prot(s + i);
  285. data_loc(d + i) = stack_loc(s + i);
  286. #ifdef LOGGING
  287. dt_sh(d + i) = st_sh(s + i) & ~SH_PROT;
  288. #endif LOGGING
  289. }
  290. }
  291. #ifdef LOGGING
  292. PRIVATE warn_dtbits(addr, n)
  293. ptr addr;
  294. size n;
  295. {
  296. register int or_bits = 0;
  297. register int and_bits = 0xff;
  298. while (n--) {
  299. or_bits |= dt_sh(addr);
  300. and_bits &= dt_sh(addr);
  301. addr++;
  302. }
  303. if (or_bits != and_bits) {
  304. /* no use trying to diagnose */
  305. warningcont(WWASMISC);
  306. return;
  307. }
  308. if (or_bits == 0)
  309. warningcont(WWASUND);
  310. if (or_bits & SH_INT)
  311. warningcont(WWASINT);
  312. if (or_bits & SH_FLOAT)
  313. warningcont(WWASFLOAT);
  314. if (or_bits & SH_DATAP)
  315. warningcont(WWASDATAP);
  316. if (or_bits & SH_INSP)
  317. warningcont(WWASINSP);
  318. }
  319. #endif LOGGING