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Implement TABLESWITCH opcode
[jamvm-avr32-jem.git] / src / interp / engine / interp_jem.c
bloba1a509a89035ba118b610dc10001a30d0a4f268b
1 /*
2 * Copyright (C) 2003, 2004, 2005, 2006, 2007
3 * Robert Lougher <rob@lougher.org.uk>.
4 *
5 * This file is part of JamVM.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2,
10 * or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 */
21
22 #define _GNU_SOURCE
23 #include <arpa/inet.h>
24 #include <math.h>
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29
30 #include "jam.h"
31 #include "thread.h"
32 #include "lock.h"
33 #include "interp.h"
34
35 #include "interp-direct.h"
36
37 #include <sys/syscall.h>
38 #include <unistd.h>
39 #include <sys/mman.h>
40
41 #include <sys/types.h>
42 #include <linux/unistd.h>
43
44 #include <asm/byteorder.h>
45 #include <asm/cachectl.h>
46
47 #include "arch/avr32_jem.h"
48 #include "interp_jem.h"
49
50 union jecr {
51 struct {
52 uint8_t dummy;
53 uint8_t opcode;
54 uint8_t op1;
55 uint8_t op2;
56 } s;
57 uint32_t i;
58 };
59
60 /**
61 * Interpreter execution context
62 */
63 struct intrp_ctx {
64 /* JEM state */
65 struct jem_state jem;
66
67 /* the interpreter execution context */
68 Frame *frame;
69 MethodBlock *mb;
70 MethodBlock *new_mb;
71 ConstantPool *cp;
72 Object *this;
73 uintptr_t *lvars_jem;
74 uintptr_t *ostack;
75 uintptr_t *arg1;
76 ExecEnv *ee;
77 };
78
79 #define GET_THIS(ctx) do { \
80 if (!((ctx)->mb->access_flags & ACC_STATIC) && (ctx)->mb->max_locals && \
81 *(ctx)->lvars_jem) { \
82 uintptr_t *__p = (uintptr_t *)*(ctx)->lvars_jem; \
83 (ctx)->this = JAM_OBJECT(__p); \
84 } else \
85 (ctx)->this = NULL; \
86 jam_dprintf("[%s] %smethod with %d vars, assigning %p\n", __func__, \
87 (ctx)->mb->access_flags & ACC_STATIC ? "static " : "", \
88 (ctx)->mb->max_locals, (ctx)->this); \
89 } while (0)
90
91 typedef int handler_fn(struct intrp_ctx *ctx);
92
93 static void jem_opcode_rewrite(uint32_t new_opcode, char *pc, int argc, ...)
94 {
95 int i;
96 va_list vargs;
97
98 va_start(vargs, argc);
99 pc[0] = new_opcode;
100 for (i = 1; i <= argc; i++)
101 pc[i] = (char)va_arg(vargs, int);
102 va_end(vargs);
103 syscall(__NR_cacheflush, CACHE_IFLUSH, (int)pc & ~31, 32);
104 }
105
106 #define min(x, y) ({ typeof(x) _x = (x); typeof(y) _y = (y); _x > _y ? _y : _x; })
107
108 //check if it is an valid object ref (see alloc.c)
109 #define OBJECT_GRAIN 8
110 #define IS_OBJECT(ptr) !(((uintptr_t)(ptr))&(OBJECT_GRAIN-1))
111
112 #define JEM_THROW_EXCEPTION(excep_name, message) \
113 ({ \
114 ctx->frame->last_pc = (CodePntr)ctx->jem.jpc; \
115 signalException(excep_name, message); \
116 jem_throwException(ctx); \
117 })
118
119 #define JEM_NULL_POINTER_CHECK(ref) \
120 if (!ref) JEM_THROW_EXCEPTION("java/lang/NullPointerException", NULL);
121
122 /*********************************************
123 * JEM Trap Handlers **
124 * *******************************************/
125 static int trap_debug(struct intrp_ctx *ctx)
126 {
127 #ifdef JEM_DEBUG
128 struct jem_state *jem = &ctx->jem;
129 union jecr jecr_u;
130 int i;
131 static unsigned long count;
132
133 jecr_u.i = jem->jecr;
134
135 jam_printf("[%lu] (%u): Trap 0x%08x: ostack 0x%x, opcode 0x%x @ 0x%08x, "
136 "operand 1 0x%x, operand 2 0x%x. Operands:\n",
137 count++, pthread_self(), jem->trap_pc, ctx->ostack, jecr_u.s.opcode,
138 jem->jpc, jecr_u.s.op1, jecr_u.s.op2);
139
140 for (i = 0; i < jem->josp; i++) {
141 uint32_t v;
142 if (ostack_read_u32(ctx->frame->ostack, ctx->ostack, i, &v) >= 0)
143 jam_printf("\tToS-%d: 0x%x\n", i, v);
144 }
145 #endif
146 return 1;
147 }
148
149
150 static int jem_throwException(struct intrp_ctx *ctx)
151 {
152 struct jem_state *jem = &ctx->jem;
153 ExecEnv *ee = ctx->ee;
154 Object *excep = ee->exception;
155 ee->exception = NULL;
156
157 jem->jpc = (unsigned long)findCatchBlock(excep->class);
158 jam_dprintf("Found exception handler at 0x%08x\n", jem->jpc);
159
160 /* If we didn't find a handler, restore exception and
161 return to previous invocation */
162
163 if (!jem->jpc) {
164 ee->exception = excep;
165 /* Original code had a "return NULL" here, which means, end of
166 * executeJava */
167 return JEM_TRAP_HANDLER_FINISH;
168 }
169
170 /* If we're handling a stack overflow, reduce the stack
171 back past the red zone to enable handling of further
172 overflows */
173
174 if (ee->overflow) {
175 ee->overflow = FALSE;
176 ee->stack_end -= STACK_RED_ZONE_SIZE;
177 }
178
179 /* Setup intepreter to run the found catch block */
180
181 ctx->frame = ee->last_frame;
182 ctx->mb = ctx->frame->mb;
183 ctx->ostack = ctx->frame->ostack;
184 ctx->lvars_jem = ctx->frame->lvars_jem - 1;
185
186 GET_THIS(ctx);
187
188 ctx->cp = &(CLASS_CB(ctx->mb->class)->constant_pool);
189
190 /* FIXME: don't know if this is correct, depends how we implement
191 * exceptions */
192 ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, (uint32_t)excep);
193
194 /* Dispatch to the first bytecode */
195 return 0;
196 }
197
198 static int opc_return(struct intrp_ctx *ctx)
199 {
200 ExecEnv *ee = ctx->ee;
201
202 /* Set interpreter state to previous frame */
203 if (ctx->frame->prev->mb == NULL) {
204 /* The previous frame is a dummy frame - this indicates
205 * top of this Java invocation. */
206 return JEM_TRAP_HANDLER_FINISH;
207 }
208
209 ctx->frame = ctx->frame->prev;
210
211 jam_dprintf("[%s] return to frame %p mb %p\n", __func__, ctx->frame, ctx->frame->mb);
212
213 if (ctx->mb->access_flags & ACC_SYNCHRONIZED) {
214 Object *sync_ob = ctx->mb->access_flags & ACC_STATIC ? (Object*)ctx->mb->class : ctx->this;
215 jam_dprintf("[%s] %smethod unlock obj %p\n", __func__,
216 ctx->mb->access_flags & ACC_STATIC ? "static " : "", sync_ob);
217 objectUnlock(sync_ob);
218 }
219
220 ctx->ostack = ctx->lvars_jem - ctx->mb->max_locals + 1 - ctx->mb->args_count;
221 ctx->mb = ctx->frame->mb;
222 ctx->lvars_jem = ctx->frame->lvars_jem - 1;
223
224 GET_THIS(ctx);
225
226 ctx->jem.jpc = (uint32_t)ctx->frame->last_pc;
227 ctx->cp = &(CLASS_CB(ctx->mb->class)->constant_pool);
228 jam_dprintf("[OPC_RETURN] ostack: %p, lvars_jem: %p this: %p class %p\n",
229 ctx->ostack, ctx->lvars_jem, ctx->this,
230 ctx->this ? ctx->this->class : NULL);
231
232 /* Pop frame */
233 ee->last_frame = ctx->frame;
234
235 return 0;
236 }
237
238 static int invokeMethod(struct intrp_ctx *ctx)
239 {
240 ExecEnv *ee = ctx->ee;
241 /* Seems like the original jamvm reused top of caller's stack for callee's
242 * local variables for passing of method arguments. Our stack and
243 * local variables grow in opposite directions now, so, this is impossible.
244 * ctx->ostack points at the beginning of the free space above ostack.
245 */
246 Frame *new_frame = (Frame *)(ctx->ostack + ctx->new_mb->max_locals);
247 Object *sync_ob = NULL;
248 int i;
249 uintptr_t *aobj;
250
251 jam_dprintf("[invokeMethod] with args count %d, frame %p, return to 0x%08x\n",
252 ctx->new_mb->args_count, new_frame, ctx->jem.jpc);
253
254 ctx->frame->last_pc = (CodePntr)ctx->jem.jpc;
255 ctx->ostack = (uintptr_t *)(new_frame + 1);
256
257 if (ostack_overflows(ctx->ostack, ctx->new_mb->max_stack, (uintptr_t *)ee->stack_end)) {
258 if (ee->overflow++) {
259 /* Overflow when we're already throwing stack overflow.
260 Stack extension should be enough to throw exception,
261 so something's seriously gone wrong - abort the VM! */
262 jam_printf("Fatal stack overflow! Aborting VM.\n");
263 exitVM(1);
264 }
265 ee->stack_end += STACK_RED_ZONE_SIZE;
266 return JEM_THROW_EXCEPTION("java/lang/StackOverflowError", NULL);
267 }
268
269 //TODO
270 new_frame->mb = ctx->new_mb;
271 //TODO: it seemed lvars is in java stack, but jos[8] should be part of java stack
272 // lvars_jem requires that the highest pointer should refer to the first local variables LV0
273 // Here still not touch the java stack, allocate lvars_jem from native heap
274
275 new_frame->lvars_jem = (uintptr_t *)new_frame;
276
277 for (i = 0; i < ctx->new_mb->max_locals; i++) {
278 if (i < ctx->new_mb->args_count) {
279 *(new_frame->lvars_jem - 1 - i) = *(ctx->arg1 + i);
280 jam_dprintf("arg[%d] = 0x%x@%p\n", i, *(ctx->arg1 + i), ctx->arg1 + i);
281 }
282 #ifdef JEM_DEBUG
283 else
284 *(new_frame->lvars_jem - 1 - i) = 0xdeadbeef;
285 #endif
286 }
287
288 jam_dprintf("[invokeMethod] %s::%s() lvars_jem %p\n",
289 CLASS_CB(ctx->new_mb->class)->name, ctx->new_mb->name, new_frame->lvars_jem);
290
291 new_frame->ostack = ctx->ostack;
292 new_frame->prev = ctx->frame;
293
294 ee->last_frame = new_frame;
295
296 if (ctx->new_mb->access_flags & ACC_SYNCHRONIZED) {
297 aobj = (uintptr_t *)*ctx->arg1;
298 sync_ob = ctx->new_mb->access_flags & ACC_STATIC ?
299 (Object*)ctx->new_mb->class : JAM_OBJECT(aobj);
300 objectLock(sync_ob);
301 }
302
303 if (ctx->new_mb->access_flags & ACC_NATIVE) {
304 //FIXME: the object references in JEM are direct pointer to instance variables.
305 // While JamVM requires object references as pointers to Object type.
306 jam_dprintf("[invokeMethod] invoke native method using %p invoker\n",
307 ctx->new_mb->native_invoker);
308 ctx->ostack = (*(uintptr_t *(*)(Class*, MethodBlock*, uintptr_t*))
309 ctx->new_mb->native_invoker)(ctx->new_mb->class, ctx->new_mb, ctx->arg1);
310
311 if (sync_ob)
312 objectUnlock(sync_ob);
313
314 ee->last_frame = ctx->frame;
315
316 if (exceptionOccured0(ee)) {
317 jam_dprintf("[invokeMethod] exception occured, goto throwException\n");
318 return jem_throwException(ctx);
319 }
320
321 jam_dprintf("[invokeMethod] finish native method invoke, return to loop\n");
322 } else {
323 ctx->frame = new_frame;
324 ctx->mb = ctx->new_mb;
325 ctx->lvars_jem = new_frame->lvars_jem - 1;
326
327 GET_THIS(ctx);
328
329 ctx->jem.jpc = (unsigned long)ctx->mb->code & ~3;
330 ctx->cp = &(CLASS_CB(ctx->mb->class)->constant_pool);
331
332 jam_dprintf("[invokeMethod] invoke virtual method: mb %x "
333 "lvars %x jpc %x cp %x\n", ctx->mb,
334 ctx->lvars_jem, ctx->jem.jpc, ctx->cp);
335 }
336
337 return 0;
338 }
339
340 static int opc_invokesuper_quick(struct intrp_ctx *ctx)
341 {
342 struct jem_state *jem = &ctx->jem;
343 Operand *operand = &jem->operand;
344
345 jam_dprintf("[OPC_INVOKESUPER_QUICK] method table indx %d\n", operand->i);
346 ctx->new_mb = CLASS_CB(CLASS_CB(ctx->mb->class)->super)->method_table[operand->i];
347 jam_dprintf("[OPC_INVOKESUPER_QUICK] method args count %d\n", ctx->new_mb->args_count);
348
349 // set up jem operand stack
350 ctx->arg1 = ostack_address(ctx->frame->ostack, ctx->mb->max_stack,
351 ctx->ostack - ctx->frame->ostack - ctx->new_mb->args_count);
352 JEM_NULL_POINTER_CHECK(*ctx->arg1);
353 jam_dprintf("[OP_INVOKESUPER_QUICK] arg1 %x\n", *ctx->arg1);
354 return invokeMethod(ctx);
355 }
356
357 static int opc_invokenonvirtual_quick(struct intrp_ctx *ctx)
358 {
359 struct jem_state *jem = &ctx->jem;
360 Operand *operand = &jem->operand;
361
362 ctx->new_mb = (MethodBlock*)operand->pntr;
363 jam_dprintf("[%s] new methodblock %s (%x) with %d args\n",
364 __func__, ctx->new_mb->name, ctx->new_mb, ctx->new_mb->args_count);
365 ctx->arg1 = ostack_address(ctx->frame->ostack, ctx->mb->max_stack,
366 ctx->ostack - ctx->frame->ostack - ctx->new_mb->args_count);
367
368 jam_dprintf("[%s] ctx->arg1 %x\n", __func__, *ctx->arg1);
369 JEM_NULL_POINTER_CHECK(*ctx->arg1);
370 return invokeMethod(ctx);
371 }
372
373 static int opc_invokevirtual_quick(struct intrp_ctx *ctx)
374 {
375 struct jem_state *jem = &ctx->jem;
376 Object *obj;
377 ctx->arg1 = ostack_address(ctx->frame->ostack, ctx->mb->max_stack,
378 ctx->ostack - ctx->frame->ostack - INV_QUICK_ARGS(jem));
379 JEM_NULL_POINTER_CHECK(*ctx->arg1);
380 Class *new_class;
381
382 //in case of "AALOAD" loads JAM obj from reference array
383 obj = (Object *)*ctx->arg1;
384 if (!JAM_ON_STACK || !IS_JAM_OBJECT(obj)) {
385 obj = JAM_OBJECT((uintptr_t *)obj);
386 //we should ensure ostack contains no JAM object
387 *ctx->arg1 = (uintptr_t)INST_DATA(obj);
388 }
389
390 jam_dprintf("[OPC_INVOKEVIRTUAL_QUICK] invoke on object %p from %p class %p\n",
391 obj, ctx->arg1, obj->class);
392 new_class = obj->class;
393 ctx->new_mb = CLASS_CB(new_class)->method_table[INV_QUICK_IDX(jem)];
394 jam_dprintf("[OPC_INVOKEVIRTUAL_QUICK] invoke method 0x%08x\n",
395 ctx->new_mb);
396 return invokeMethod(ctx);
397 }
398
399 static int opc_invokevirtual(struct intrp_ctx *ctx)
400 {
401 int idx;
402 ExecEnv *ee = ctx->ee;
403 struct jem_state *jem = &ctx->jem;
404
405 idx = jem->jecr & 0xffff;
406 ctx->frame->last_pc = (CodePntr)jem->jpc;
407 ctx->new_mb = resolveMethod(ctx->mb->class, idx);
408
409 if (exceptionOccured0(ee))
410 return jem_throwException(ctx);
411
412 jem->operand.uu.u1 = ctx->new_mb->args_count;
413 jem->operand.uu.u2 = ctx->new_mb->method_table_index;
414
415 jam_dprintf("[OPC_INVOKEVIRTUAL] invoke 0x%08x with args count %d\n",
416 ctx->new_mb, ctx->new_mb->args_count);
417
418 return opc_invokevirtual_quick(ctx);
419 }
420
421 static int opc_invokespecial(struct intrp_ctx *ctx)
422 {
423 int idx;
424 struct jem_state *jem = &ctx->jem;
425 Operand *operand = &jem->operand;
426 ExecEnv *ee = ctx->ee;
427
428 /* INVOKESPECIAL's operands represent an index into the Constant Pool */
429 idx = jem->jecr & 0xffff;
430
431 jam_dprintf("[OPC_INVOKESPECIAL] constant pool index %d\n", idx);
432
433 ctx->new_mb = resolveMethod(ctx->mb->class, idx);
434
435 if (exceptionOccured0(ee))
436 return jem_throwException(ctx);
437
438 jam_dprintf("Resolved %s\n", ctx->new_mb->name);
439
440 /* Check if invoking a super method... */
441 if ((CLASS_CB(ctx->mb->class)->access_flags & ACC_SUPER) &&
442 ((ctx->new_mb->access_flags & ACC_PRIVATE) == 0) && (ctx->new_mb->name[0] != '<')) {
443
444 operand->i = ctx->new_mb->method_table_index;
445 return opc_invokesuper_quick(ctx);
446 #if 0 /* FIXME: verify this whole "pc" chemistry is indeed unneeded */
447 OPCODE_REWRITE(OPC_INVOKESUPER_QUICK, cache, operand);
448 #endif
449 } else {
450 operand->pntr = ctx->new_mb;
451 return opc_invokenonvirtual_quick(ctx);
452 }
453
454 return 0;
455 }
456
457 static int opc_invokestatic_quick(struct intrp_ctx *ctx)
458 {
459 struct jem_state *jem = &ctx->jem;
460
461 ctx->new_mb = RESOLVED_METHOD(jem);
462 ctx->arg1 = ostack_address(ctx->frame->ostack, ctx->mb->max_stack,
463 ctx->ostack - ctx->frame->ostack - ctx->new_mb->args_count);
464 return invokeMethod(ctx);
465 }
466
467 static int opc_invokestatic(struct intrp_ctx *ctx)
468 {
469 int idx, cache;
470 struct jem_state *jem = &ctx->jem;
471 Operand *operand = &jem->operand;
472 ExecEnv *ee = ctx->ee;
473
474 idx = jem->jecr & 0xffff;
475
476 ctx->frame->last_pc = (CodePntr)jem->jpc;
477 ctx->new_mb = resolveMethod(ctx->mb->class, idx);
478
479 if (exceptionOccured0(ee))
480 return jem_throwException(ctx);
481
482 operand->pntr = ctx->new_mb;
483 return opc_invokestatic_quick(ctx);
484 }
485
486 static int opc_new_quick(struct intrp_ctx *ctx)
487 {
488 struct jem_state *jem = &ctx->jem;
489 Operand *operand = &jem->operand;
490 Class *class = (Class*)CP_INFO(ctx->cp, operand->uui.u1);
491 Object *obj;
492
493 ctx->frame->last_pc = (CodePntr)jem->jpc;
494 if ((obj = allocObject(class)) == NULL)
495 return jem_throwException(ctx);
496 jam_dprintf("[OPC_NEW_QUICK] push obj ref %x to stack\n", obj);
497 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
498 (uint32_t)INST_DATA(obj));
499 }
500
501 static int opc_new(struct intrp_ctx *ctx)
502 {
503 struct jem_state *jem = &ctx->jem;
504 Operand *operand = &jem->operand;
505 int idx = jem->jecr & 0xffff;
506 int opcode = (jem->jecr >> 16) & 0xff;
507 Class *class;
508 ExecEnv *ee = ctx->ee;
509
510 operand->uui.u1 = idx;
511 operand->uui.u2 = opcode;
512
513 jam_dprintf("[OPC_NEW] opcode: 0x%x, index: 0x%x\n", opcode, idx);
514
515 ctx->frame->last_pc = (CodePntr)jem->jpc;
516 class = resolveClass(ctx->mb->class, idx, opcode == OPC_NEW);
517 if (exceptionOccured0(ee))
518 return jem_throwException(ctx);
519
520 if (opcode == OPC_NEW) {
521 ClassBlock *cb = CLASS_CB(class);
522 if (cb->access_flags & (ACC_INTERFACE | ACC_ABSTRACT)) {
523 signalException("java/lang/InstantiationError", cb->name);
524 return jem_throwException(ctx);
525 }
526 /* rewrite opcode to OPC_NEW_QUICK (0xDD) */
527 jem_opcode_rewrite(0xDD, (char*)jem->jpc - 3, 0);
528 }
529
530 return opc_new_quick(ctx);
531 }
532
533 static int opc_anewarray_quick(struct intrp_ctx *ctx)
534 {
535 struct jem_state *jem = &ctx->jem;
536 ConstantPool *cp = ctx->cp;
537 Class *class = RESOLVED_CLASS(jem);
538 char *name = CLASS_CB(class)->name;
539 int count;
540 Class *array_class;
541 char *ac_name;
542 Object *obj;
543 ExecEnv *ee = ctx->ee;
544
545 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, count);
546 ctx->frame->last_pc = (CodePntr)jem->jpc;
547
548 jam_dprintf("[OPC_ANEWARRAY_QUICK] array %s size %d\n", name, count);
549 if (count < 0) {
550 signalException("java/lang/NegativeArraySizeException", NULL);
551 return jem_throwException(ctx);
552 }
553
554 ac_name = sysMalloc(strlen(name) + 4);
555
556 if (name[0] == '[')
557 sprintf(ac_name, "[%s", name);
558 else
559 sprintf(ac_name, "[L%s;", name);
560
561 array_class = findArrayClassFromClass(ac_name, ctx->mb->class);
562 free(ac_name);
563
564 if (exceptionOccured0(ee))
565 return jem_throwException(ctx);
566
567 if ((obj = allocArray(array_class, count, sizeof(Object*))) == NULL)
568 return jem_throwException(ctx);
569
570 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
571 (uint32_t)ARRAY_DATA(obj));
572 }
573
574 static int opc_anewarray(struct intrp_ctx *ctx)
575 {
576 struct jem_state *jem = &ctx->jem;
577 Operand *operand = &jem->operand;
578 int idx = jem->jecr & 0xffff;
579 int opcode = (jem->jecr >> 16) & 0xff;
580 Class *class;
581 ExecEnv *ee = ctx->ee;
582
583 operand->uui.u1 = idx;
584 operand->uui.u2 = opcode;
585
586 jam_dprintf("[OPC_ANEWARRAY] index: 0x%x\n", idx);
587
588 ctx->frame->last_pc = (CodePntr)jem->jpc;
589 //resolve the array class
590 class = resolveClass(ctx->mb->class, idx, FALSE);
591
592 if (exceptionOccured0(ee))
593 return jem_throwException(ctx);
594
595 return opc_anewarray_quick(ctx);
596 }
597
598 static int opc_multianewarray_quick(struct intrp_ctx *ctx)
599 {
600 struct jem_state *jem = &ctx->jem;
601 ConstantPool *cp = ctx->cp;
602 Class *class = RESOLVED_CLASS(jem);
603 int i, dim = MULTI_ARRAY_DIM(jem);
604 int count;
605 Object *obj;
606 ExecEnv *ee = ctx->ee;
607
608 ctx->frame->last_pc = (CodePntr)jem->jpc;
609
610 jam_dprintf("[OPC_MULTIANEWARRAY_QUICK]: alloc %d dimensional array for class %s\n", dim, CLASS_CB(class)->name);
611 for (i = 0; i < dim; i++) {
612 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, count);
613 jam_dprintf("[OPC_MULTIANEWARRAY_QUICK]: elements %d for dim %d\n", count, i);
614 if (count < 0) {
615 signalException("java/lang/NegativeArraySizeException", NULL);
616 return jem_throwException(ctx);
617 }
618 }
619
620 /* counts are still stored in ostack even after we did pop them out */
621 if ((obj = allocMultiArray(class, dim, (intptr_t *)ctx->ostack)) == NULL)
622 return jem_throwException(ctx);
623
624 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
625 (uint32_t)ARRAY_DATA(obj));
626 }
627
628 static int opc_multianewarray(struct intrp_ctx *ctx)
629 {
630 struct jem_state *jem = &ctx->jem;
631 Operand *operand = &jem->operand;
632 int idx = operand->uui.u1 = jem->jecr & 0xffff;
633
634 Class *class;
635 ExecEnv *ee = ctx->ee;
636
637 /* dimensions */
638 operand->uui.u2 = *(unsigned char*)jem->jpc;
639 jem->jpc++; /* skip dims */
640
641 ctx->frame->last_pc = (CodePntr)jem->jpc;
642 /* resolve the array class */
643 class = resolveClass(ctx->mb->class, idx, FALSE);
644
645 if (exceptionOccured0(ee))
646 return jem_throwException(ctx);
647
648 return opc_multianewarray_quick(ctx);
649 }
650
651 static int opc_newarray(struct intrp_ctx *ctx)
652 {
653 struct jem_state *jem = &ctx->jem;
654 int type = (jem->jecr >> 8) & 0xff;
655 int count;
656 Object *obj;
657
658 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, count);
659 ctx->frame->last_pc = (CodePntr)jem->jpc;
660
661 jam_dprintf("[OPC_NEWARRAY] alloc array type %d, count %d\n", type, count);
662 if ((obj = allocTypeArray(type, count)) == NULL)
663 return jem_throwException(ctx);
664
665 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
666 (uint32_t)ARRAY_DATA(obj));
667 }
668
669 static int opc_putfield_quick(struct intrp_ctx *ctx)
670 {
671 uint32_t arg;
672 uint32_t obj;
673 struct jem_state *jem = &ctx->jem;
674
675 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, arg);
676 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, obj);
677 jam_dprintf("[OPC_PUTFIELD_QUICK] put field %x to obj(%d) %x\n", arg,
678 SINGLE_INDEX(jem), obj);
679
680 JEM_NULL_POINTER_CHECK(obj);
681
682 if (JAM_ON_STACK && IS_JAM_OBJECT(obj))
683 obj = (uint32_t)INST_DATA((Object *)obj);
684
685 ((uint32_t*)obj)[SINGLE_INDEX(jem)] = arg;
686
687 return 0;
688 }
689
690 static int opc_putfield2_quick(struct intrp_ctx *ctx)
691 {
692 uint64_t arg;
693 uint32_t obj;
694 struct jem_state *jem = &ctx->jem;
695
696 ostack_pop_u64(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, arg);
697 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, obj);
698
699 JEM_NULL_POINTER_CHECK((uintptr_t*)obj);
700
701 if (JAM_ON_STACK && IS_JAM_OBJECT(obj))
702 obj = (uint32_t)INST_DATA((Object *)obj);
703
704 *(uint64_t *)&(((uint32_t*)obj)[SINGLE_INDEX(jem)]) = arg;
705 jam_dprintf("[OPC_PUTFIELD2_QUICK] put 64 bit %08x to obj %08x\n", arg, obj);
706
707 return 0;
708 }
709
710 static int opc_putfield_quick_jem0(struct intrp_ctx *ctx)
711 {
712 uint32_t arg;
713 uintptr_t *aobj;
714 struct jem_state *jem = &ctx->jem;
715
716 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, arg);
717 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
718 jam_dprintf("[OPC_PUTFIELD_QUICK_JEM0] field %x\n", arg);
719
720 JEM_NULL_POINTER_CHECK(aobj);
721
722 if (JAM_ON_STACK && arg && !IS_JAM_OBJECT(arg))
723 arg = (uint32_t)JAM_OBJECT((uintptr_t *)arg);
724
725 if (JAM_ON_STACK && IS_JAM_OBJECT(aobj))
726 aobj = INST_DATA((Object *)aobj);
727
728 aobj[SINGLE_INDEX(jem)] = arg;
729 jam_dprintf("[OPC_PUTFIELD_QUICK_JEM0] put field %x to obj(%d) %x\n", arg,
730 SINGLE_INDEX(jem), aobj);
731
732 return 0;
733 }
734
735 static int opc_putfield_quick_jem1(struct intrp_ctx *ctx)
736 {
737 uintptr_t *aobj, *arg;
738 struct jem_state *jem = &ctx->jem;
739
740 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, arg);
741 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
742 jam_dprintf("[OPC_PUTFIELD_QUICK_JEM1] field %p\n", arg);
743
744 if (JAM_ON_STACK && arg && !IS_JAM_ARRAY(arg))
745 arg = (uintptr_t *)JAM_ARRAY(arg);
746
747 if (JAM_ON_STACK && IS_JAM_OBJECT(aobj))
748 aobj = INST_DATA((Object *)aobj);
749
750 JEM_NULL_POINTER_CHECK(aobj);
751 aobj[SINGLE_INDEX(jem)] = (uintptr_t)arg;
752 jam_dprintf("[OPC_PUTFIELD_QUICK_JEM1] put field %p to obj(%d) %p\n", arg,
753 SINGLE_INDEX(jem), aobj);
754
755 return 0;
756 }
757
758 static int opc_putfield(struct intrp_ctx *ctx)
759 {
760 struct jem_state *jem = &ctx->jem;
761 int idx = jem->jecr & 0xffff;
762 FieldBlock *fb;
763 ExecEnv *ee = ctx->ee;
764
765 jam_dprintf("[OPC_PUTFIELD] constant pool index %d\n", idx);
766
767 ctx->frame->last_pc = (CodePntr)jem->jpc;
768 fb = resolveField(ctx->mb->class, idx);
769 jam_dprintf("[OPC_PUTFIELD] resolve field 0x%08x, type %c, name %s\n", fb, *fb->type, fb->name);
770
771 if (exceptionOccured0(ee))
772 return jem_throwException(ctx);
773
774 jem->operand.i = fb->offset;
775 switch (*fb->type) {
776 case 'J':
777 case 'D':
778 /* rewrite opc_putfield to opc_putfield2_quick */
779 jem_opcode_rewrite(0xD1, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
780 return opc_putfield2_quick(ctx);
781 case 'L':
782 jem_opcode_rewrite(0xCF, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
783 return opc_putfield_quick_jem0(ctx);
784 case '[':
785 jem_opcode_rewrite(0xCF, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
786 return opc_putfield_quick_jem1(ctx);
787 default:
788 jem_opcode_rewrite(0xCF, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
789 return opc_putfield_quick(ctx);
790 }
791 }
792
793 static int opc_getfield2_quick(struct intrp_ctx *ctx)
794 {
795 uint32_t *obj;
796 struct jem_state *jem = &ctx->jem;
797 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, obj);
798 JEM_NULL_POINTER_CHECK(obj);
799
800 if (JAM_ON_STACK && IS_JAM_OBJECT(obj))
801 obj = (uint32_t*)INST_DATA((Object*)obj);
802
803 jam_dprintf("[OPC_GETFIELD2_QUICK] get 64 bit field %08x from obj %08x\n",
804 *(uint64_t*)(&(obj[SINGLE_INDEX(jem)])), obj);
805
806 return ostack_push_u64(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
807 *(uint64_t*)(&(obj[SINGLE_INDEX(jem)])));
808 }
809
810 static int opc_getfield_quick(struct intrp_ctx *ctx)
811 {
812 uintptr_t *aobj;
813 struct jem_state *jem = &ctx->jem;
814
815 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
816 JEM_NULL_POINTER_CHECK(aobj);
817
818 if (JAM_ON_STACK && IS_JAM_OBJECT(aobj))
819 aobj = (uint32_t*)INST_DATA((Object*)aobj);
820
821 jam_dprintf("[OPC_GETFIELD_QUICK] get field %08x from obj %08x\n",
822 aobj[SINGLE_INDEX(jem)], aobj);
823 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
824 aobj[SINGLE_INDEX(jem)]);
825 }
826
827 static int opc_getfield_quick_jem0(struct intrp_ctx *ctx)
828 {
829 uint32_t *aobj;
830 struct jem_state *jem = &ctx->jem;
831
832 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
833 JEM_NULL_POINTER_CHECK(aobj);
834
835 if (JAM_ON_STACK && IS_JAM_OBJECT(aobj))
836 aobj = (uint32_t*)INST_DATA((Object*)aobj);
837
838 uint32_t value = aobj[SINGLE_INDEX(jem)];
839 if (value) {
840 Object *ref = (Object*)value;
841 if (JAM_ON_STACK && IS_JAM_OBJECT(ref))
842 //jamvm objref
843 value = (uint32_t)INST_DATA(ref);
844 jam_dprintf("[OPC_GETFIELD_QUICK_JEM0] obj %p ref %x, class %p : %p\n",
845 aobj, value, JAM_OBJECT((void *)value)->class, ref->class);
846 }
847 jam_dprintf("[OPC_GETFIELD_QUICK_JEM0] put obj ref %x\n", value);
848 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
849 }
850
851 static int opc_getfield_quick_jem1(struct intrp_ctx *ctx)
852 {
853 uint32_t *aobj;
854 struct jem_state *jem = &ctx->jem;
855
856 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
857 JEM_NULL_POINTER_CHECK(aobj);
858
859 //"aaload" would put jamvm obj ref onto the ostack
860 if (JAM_ON_STACK && IS_JAM_OBJECT(aobj))
861 aobj = (uint32_t*)INST_DATA((Object*)aobj);
862
863 uint32_t value = aobj[SINGLE_INDEX(jem)];
864 jam_dprintf("[OPC_GETFIELD_QUICK_JEM1] array ref %x\n", value);
865 if (value) {
866 Object *ref = (Object*)value;
867 if (JAM_ON_STACK && IS_JAM_ARRAY(ref))
868 value = (uint32_t)ARRAY_DATA(ref);
869 }
870 jam_dprintf("[OPC_GETFIELD_QUICK_JEM1] put array ref %x\n", value);
871 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
872 }
873
874 static int opc_getfield(struct intrp_ctx *ctx)
875 {
876 struct jem_state *jem = &ctx->jem;
877 int idx = jem->jecr & 0xffff;
878 FieldBlock *fb;
879 ExecEnv *ee = ctx->ee;
880
881 jam_dprintf("[OPC_GETFIELD] constant pool index %d\n", idx);
882
883 ctx->frame->last_pc = (CodePntr)jem->jpc;
884 fb = resolveField(ctx->mb->class, idx);
885
886 if (exceptionOccured0(ee))
887 return jem_throwException(ctx);
888
889 jem->operand.i = fb->offset;
890
891 jam_dprintf("[OPC_GETFIELD] resolve field %s @ %p, type %c, offset %i, class %p\n",
892 fb->name, fb, *fb->type, jem->operand.i, fb->class);
893
894 switch (*fb->type) {
895 case 'J':
896 case 'D':
897 jem_opcode_rewrite(0xD0, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
898 return opc_getfield2_quick(ctx);
899 /*
900 * Though we assume all objrefs/arrayrefs here should be JEM compliant, but
901 * in case of some JNI code will set field natively, we still handle it
902 * separately here.
903 */
904 case 'L':
905 jem_opcode_rewrite(0xCE, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
906 return opc_getfield_quick_jem0(ctx);
907 case '[':
908 jem_opcode_rewrite(0xCE, (char*)jem->jpc - 3, 2, fb->offset >> 8, fb->offset);
909 return opc_getfield_quick_jem1(ctx);
910 default:
911 //jem_opcode_rewrite(0xCE, (char*)jem->jpc - 3, 2, (fb->offset>>8)&0xff, (fb->offset)&0xff);
912 return opc_getfield_quick(ctx);
913 }
914 }
915
916 static int opc_ldc_w_quick_jem(struct intrp_ctx *ctx)
917 {
918 struct jem_state *jem = &ctx->jem;
919 //CONSTANT_Class and CONSTANT_String are stored as object reference
920 Object *cp_info = (Object*)CP_INFO(ctx->cp, DOUBLE_INDEX(jem));
921 jam_dprintf("[OPC_LDC_W_QUICK_JEM] push String ref %x to stack\n", cp_info);
922 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
923 (uint32_t)INST_DATA(cp_info));
924 }
925
926 static int opc_ldc_quick(struct intrp_ctx *ctx)
927 {
928 struct jem_state *jem = &ctx->jem;
929 uint32_t constant = RESOLVED_CONSTANT(jem);
930 jam_dprintf("[OPC_LDC_QUICK] push constant %x to stack\n", constant);
931 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, (uintptr_t)constant);
932 }
933
934 static int opc_ldc_common(struct intrp_ctx *ctx, int idx)
935 {
936 struct jem_state *jem = &ctx->jem;
937 ExecEnv *ee = ctx->ee;
938 ctx->frame->last_pc = (CodePntr)jem->jpc;
939
940 jem->operand.u = resolveSingleConstant(ctx->mb->class, idx);
941
942 if (exceptionOccured0(ee))
943 return jem_throwException(ctx);
944
945 switch (CP_TYPE(ctx->cp, idx)) {
946 case CONSTANT_ResolvedClass:
947 case CONSTANT_ResolvedString:
948 jem->operand.i = idx;
949 return opc_ldc_w_quick_jem(ctx);
950 default:
951 jem_opcode_rewrite(0xCB, (char*)jem->jpc - 2, 0);
952 return opc_ldc_quick(ctx);
953 }
954 }
955
956 static int opc_ldc(struct intrp_ctx *ctx)
957 {
958 int idx;
959 ExecEnv *ee = ctx->ee;
960 struct jem_state *jem = &ctx->jem;
961
962 idx = (jem->jecr & 0xff00) >> 8;
963
964 jam_dprintf("[OPC_LDC] constant pool index %d\n", idx);
965 return opc_ldc_common(ctx, idx);
966 }
967
968 static int opc_ldc_w(struct intrp_ctx *ctx)
969 {
970 int idx;
971 ExecEnv *ee = ctx->ee;
972 struct jem_state *jem = &ctx->jem;
973
974 idx = (jem->jecr & 0xffff);
975
976 jam_dprintf("[OPC_LDC_W] constant pool index %d\n", idx);
977 return opc_ldc_common(ctx, idx);
978 }
979
980 static int opc_monitorenter(struct intrp_ctx *ctx)
981 {
982 Object *obj;
983 uintptr_t *ptr;
984 struct jem_state *jem = &ctx->jem;
985 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ptr);
986
987 obj = JAM_OBJECT(ptr);
988 if (!IS_OBJECT(obj))
989 /* is an array ref */
990 obj = JAM_ARRAY(ptr);
991 jam_dprintf("[OPC_MONITORENTER] lock %x\n", obj);
992 JEM_NULL_POINTER_CHECK(obj);
993 objectLock(obj);
994 return 0;
995 }
996
997 static int opc_monitorexit(struct intrp_ctx *ctx)
998 {
999 Object *obj;
1000 uintptr_t *ptr;
1001 struct jem_state *jem = &ctx->jem;
1002 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ptr);
1003
1004 obj = JAM_OBJECT(ptr);
1005 if (!IS_OBJECT(obj))
1006 /* is an array ref */
1007 obj = JAM_ARRAY(ptr);
1008 jam_dprintf("[OPC_MONITOREXIT] unlock %x\n", obj);
1009 JEM_NULL_POINTER_CHECK(obj);
1010 objectUnlock(obj);
1011 return 0;
1012 }
1013
1014 static int opc_getstatic_quick(struct intrp_ctx *ctx)
1015 {
1016 struct jem_state *jem = &ctx->jem;
1017 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
1018 RESOLVED_FIELD(jem)->static_value);
1019 }
1020
1021 static int opc_getstatic2_quick(struct intrp_ctx *ctx)
1022 {
1023 struct jem_state *jem = &ctx->jem;
1024 return ostack_push_u64(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
1025 RESOLVED_FIELD(jem)->static_value);
1026 }
1027
1028 static int opc_getstatic_quick_jem0(struct intrp_ctx *ctx)
1029 {
1030 struct jem_state *jem = &ctx->jem;
1031 uintptr_t value = RESOLVED_FIELD(jem)->static_value;
1032
1033 jam_dprintf("[OPC_GETSTATIC_QUICK_JEM0] obj ref %x\n", value);
1034 if (value) {
1035 Object *ref = (Object *)value;
1036 if (!JAM_ON_STACK || IS_JAM_OBJECT(ref))
1037 //jamvm objref
1038 value = (uintptr_t)INST_DATA(ref);
1039 }
1040 jam_dprintf("[OPC_GETSTATIC_QUICK_JEM0] put obj ref %x\n", value);
1041 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
1042 }
1043
1044 static int opc_getstatic_quick_jem1(struct intrp_ctx *ctx)
1045 {
1046 struct jem_state *jem = &ctx->jem;
1047 uintptr_t value = RESOLVED_FIELD(jem)->static_value;
1048 jam_dprintf("[OPC_GETSTATIC_QUICK_JEM1] array ref %x\n", value);
1049 if (value) {
1050 Object *ref = (Object*)value;
1051 if (!JAM_ON_STACK || IS_JAM_ARRAY(ref))
1052 //jamvm arrayref
1053 value = (uintptr_t)ARRAY_DATA(ref);
1054 }
1055 jam_dprintf("[OPC_GETSTATIC_QUICK_JEM1] put array ref %x\n", value);
1056 return ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
1057 }
1058
1059 static int opc_getstatic(struct intrp_ctx *ctx)
1060 {
1061 int idx;
1062 FieldBlock *fb;
1063 Operand operand;
1064 ExecEnv *ee = ctx->ee;
1065 struct jem_state *jem = &ctx->jem;
1066
1067 idx = (int)(jem->jecr & 0xffff);
1068 jam_dprintf("[OPC_GETSTATIC] constant pool index %d class %s\n",idx,CLASS_CB(ctx->mb->class)->name);
1069
1070 ctx->frame->last_pc = (CodePntr)jem->jpc;
1071 fb = resolveField(ctx->mb->class, idx);
1072
1073 if (exceptionOccured0(ee))
1074 return jem_throwException(ctx);
1075
1076 jam_dprintf("[OPC_GETSTATIC] get static for field %08x, type %c\n", fb, *fb->type);
1077 jem->operand.pntr = fb;
1078 switch (*fb->type) {
1079 case 'J':
1080 case 'D':
1081 return opc_getstatic2_quick(ctx);
1082 /*
1083 * see opc_getfield
1084 */
1085 case 'L':
1086 return opc_getstatic_quick_jem0(ctx);
1087 case '[':
1088 return opc_getstatic_quick_jem1(ctx);
1089 default:
1090 return opc_getstatic_quick(ctx);
1091 }
1092 }
1093
1094 static int opc_putstatic2_quick(struct intrp_ctx *ctx)
1095 {
1096 struct jem_state *jem = &ctx->jem;
1097 return ostack_pop_u64(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
1098 *(u8*)&RESOLVED_FIELD(jem)->static_value);
1099 }
1100
1101 static int opc_putstatic_quick(struct intrp_ctx *ctx)
1102 {
1103 struct jem_state *jem = &ctx->jem;
1104 return ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
1105 RESOLVED_FIELD(jem)->static_value);
1106 }
1107
1108 static int opc_putstatic_quick_jem0(struct intrp_ctx *ctx)
1109 {
1110 uintptr_t value;
1111 struct jem_state *jem = &ctx->jem;
1112 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
1113
1114 jam_dprintf("[OPC_PUTSTATIC_QUICK_JEM0] obj %x\n", value);
1115 if (value && (!JAM_ON_STACK || !IS_JAM_OBJECT(value)))
1116 value = (uintptr_t)JAM_OBJECT((uintptr_t *)value);
1117 jam_dprintf("[OPC_PUTSTATIC_QUICK_JEM0] put obj %x\n", value);
1118 RESOLVED_FIELD(jem)->static_value = value;
1119 return 0;
1120 }
1121
1122 static int opc_putstatic_quick_jem1(struct intrp_ctx *ctx)
1123 {
1124 uintptr_t *value;
1125 struct jem_state *jem = &ctx->jem;
1126 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
1127
1128 jam_dprintf("[OPC_PUTSTATIC_QUICK_JEM1] array %p\n", value);
1129 if (value && (!JAM_ON_STACK || !IS_JAM_ARRAY(value)))
1130 value = (uintptr_t*)JAM_ARRAY(value);
1131 jam_dprintf("[OPC_PUTSTATIC_QUICK_JEM1] put array %p\n", value);
1132 RESOLVED_FIELD(jem)->static_value = (uintptr_t)value;
1133 return 0;
1134 }
1135
1136 static int opc_putstatic(struct intrp_ctx *ctx)
1137 {
1138 int idx;
1139 FieldBlock *fb;
1140 Operand operand;
1141 ExecEnv *ee = ctx->ee;
1142 struct jem_state *jem = &ctx->jem;
1143
1144 idx = (int)(jem->jecr & 0xffff);
1145
1146 ctx->frame->last_pc = (CodePntr)jem->jpc;
1147 fb = resolveField(ctx->mb->class, idx);
1148
1149 if (exceptionOccured0(ee))
1150 return jem_throwException(ctx);
1151
1152 jam_dprintf("[OPC_PUTSTATIC] put static for field %08x, type %c\n", fb, *fb->type);
1153 jem->operand.pntr = fb;
1154 switch (*fb->type) {
1155 case 'J':
1156 case 'D':
1157 //jem_opcode_rewrite(0xD5, (char*)jem->jpc - 3);
1158 return opc_putstatic2_quick(ctx);
1159 case 'L':
1160 return opc_putstatic_quick_jem0(ctx);
1161 case '[':
1162 return opc_putstatic_quick_jem1(ctx);
1163 default:
1164 return opc_putstatic_quick(ctx);
1165 }
1166 }
1167
1168 static int opc_checkcast_quick(struct intrp_ctx *ctx)
1169 {
1170 struct jem_state *jem = &ctx->jem;
1171 ConstantPool *cp = ctx->cp;
1172 Class *class = RESOLVED_CLASS(jem);
1173 Object *obj;
1174 uintptr_t *ptr;
1175
1176 ostack_read_u32(ctx->frame->ostack, ctx->ostack, 0, &ptr);
1177 jam_dprintf("[OPC_CHECKCAST_QUICK] check cast for JEM type %x (class %s)\n", ptr, CLASS_CB(class)->name);
1178 if (ptr != NULL) {
1179 #warning Does not look right!
1180 if (!JAM_ON_STACK || !IS_JAM_OBJECT(ptr) || !IS_JAM_ARRAY(ptr)) {
1181 obj = JAM_OBJECT(ptr);
1182 if (!IS_OBJECT(obj)) {
1183 jam_dprintf("[OPC_CHECKCAST_QUICK] check cast for array\n");
1184 //should be array ref
1185 obj = JAM_ARRAY(ptr);
1186 }
1187 jam_dprintf("[OPC_CHECKCAST_QUICK] check cast for object %x\n", obj);
1188 } else {
1189 obj = (Object*)ptr;
1190 }
1191 jam_dprintf("[OPC_CHECKCAST_QUICK] check class %p (%s) for obj %p (%s)\n",
1192 class, CLASS_CB(class)->name, obj->class, CLASS_CB(obj->class)->name);
1193 if (!isInstanceOf(class, obj->class))
1194 return JEM_THROW_EXCEPTION("java/lang/ClassCastException", CLASS_CB(obj->class)->name);
1195 }
1196
1197 return 0;
1198 }
1199
1200 static int opc_checkcast(struct intrp_ctx *ctx)
1201 {
1202 struct jem_state *jem = &ctx->jem;
1203 Operand *operand = &jem->operand;
1204 int idx = jem->jecr & 0xffff;
1205 int opcode = (jem->jecr >> 16) & 0xff;
1206 Class *class;
1207 ExecEnv *ee = ctx->ee;
1208
1209 operand->uui.u1 = idx;
1210 operand->uui.u2 = opcode;
1211
1212 jam_dprintf("[OPC_CHECKCAST] index: 0x%x\n", idx);
1213
1214 ctx->frame->last_pc = (CodePntr)jem->jpc;
1215 //resolve the cast class
1216 class = resolveClass(ctx->mb->class, idx, FALSE);
1217
1218 if (exceptionOccured0(ee))
1219 return jem_throwException(ctx);
1220
1221 return opc_checkcast_quick(ctx);
1222 }
1223
1224 static int opc_invokeinterface_quick(struct intrp_ctx *ctx)
1225 {
1226 int mtbl_idx;
1227 ClassBlock *cb;
1228 Object *objref;
1229 int cache = ctx->jem.operand.uu.u2;
1230
1231 ctx->new_mb = (MethodBlock *)CP_INFO(ctx->cp, ctx->jem.operand.uu.u1);
1232 ctx->arg1 = ostack_address(ctx->frame->ostack, ctx->mb->max_stack,
1233 ctx->ostack - ctx->frame->ostack - ctx->new_mb->args_count);
1234
1235 jam_dprintf("[OPC_INVOKEINTERFACE_QUICK] newmb %x (name %s) (args count %d) objref(jem) %x\n",
1236 ctx->new_mb, ctx->new_mb->name, ctx->new_mb->args_count, ctx->arg1);
1237
1238 objref = (Object *)*ctx->arg1;
1239 #warning Does not look right!
1240 if (!JAM_ON_STACK || !IS_JAM_OBJECT(objref) || !IS_JAM_ARRAY(objref)) {
1241 objref = JAM_OBJECT((uintptr_t *)objref);
1242 if (!IS_OBJECT(objref))
1243 objref = JAM_ARRAY((uintptr_t *)*ctx->arg1);
1244 } else {
1245 //turn type in the stack to JEM type ref
1246 *ctx->arg1 = (uintptr_t)INST_DATA(objref);
1247 }
1248 JEM_NULL_POINTER_CHECK(objref);
1249
1250 cb = CLASS_CB(objref->class);
1251
1252 if ((cache >= cb->imethod_table_size) ||
1253 (ctx->new_mb->class != cb->imethod_table[cache].interface)) {
1254 for (cache = 0; (cache < cb->imethod_table_size) &&
1255 (ctx->new_mb->class != cb->imethod_table[cache].interface); cache++);
1256
1257 if (cache == cb->imethod_table_size)
1258 return JEM_THROW_EXCEPTION("java/lang/IncompatibleClassChangeError",
1259 "unimplemented interface");
1260 }
1261
1262 mtbl_idx = cb->imethod_table[cache].offsets[ctx->new_mb->method_table_index];
1263 jam_dprintf("[OPC_INVOKEINTERFACE_QUICK] find method at %d\n", mtbl_idx);
1264 ctx->new_mb = cb->method_table[mtbl_idx];
1265 jam_dprintf("[OPC_INVOKEINTERFACE_QUICK] invoking method at %d\n", mtbl_idx);
1266 return invokeMethod(ctx);
1267 }
1268
1269 static int opc_invokeinterface(struct intrp_ctx *ctx)
1270 {
1271 struct jem_state *jem = &ctx->jem;
1272 Operand *operand = &jem->operand;
1273 ExecEnv *ee = ctx->ee;
1274
1275 int idx = operand->uu.u1 = jem->jecr & 0xffff;
1276 /*NOTES: invokeinterface opcode is supposed to take 4 operands.
1277 * For JEM, two index bytes has been processed before trap,
1278 * so offset jpc 4 operands for next opcode
1279 *FIXME: ? not know why JEM does not handle this */
1280 ctx->frame->last_pc = (CodePntr)(jem->jpc += 2);
1281 ctx-> new_mb = resolveInterfaceMethod(ctx->mb->class, idx);
1282
1283 jam_dprintf("[OPC_INVOKEINTERFACE] constant pool index %d\n", idx);
1284 if (exceptionOccured0(ee))
1285 return jem_throwException(ctx);
1286
1287 if (CLASS_CB(ctx->new_mb->class)->access_flags & ACC_INTERFACE) {
1288 operand->uu.u2 = 0;
1289 return opc_invokeinterface_quick(ctx);
1290 } else {
1291 operand->uu.u1 = ctx->new_mb->args_count;
1292 operand->uu.u2 = ctx->new_mb->method_table_index;
1293 return opc_invokevirtual_quick(ctx);
1294 }
1295 }
1296
1297 static int opc_instanceof_quick(struct intrp_ctx *ctx)
1298 {
1299 struct jem_state *jem = &ctx->jem;
1300 ConstantPool *cp = ctx->cp;
1301 Class *class = RESOLVED_CLASS(jem);
1302 Object *obj;
1303 uintptr_t *ptr;
1304
1305 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ptr);
1306 if (ptr != NULL) {
1307 obj = JAM_OBJECT(ptr);
1308 if (!IS_OBJECT(obj)) {
1309 jam_dprintf("[OPC_INSTANCEOF_QUICK] instanceof for array\n");
1310 //should be array ref
1311 obj = JAM_ARRAY(ptr);
1312 }
1313
1314 jam_dprintf("[OPC_INSTANCEOF_QUICK] check instanceof class %s for obj(%s)\n",
1315 CLASS_CB(class)->name, CLASS_CB(obj->class)->name);
1316 }
1317 ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack,
1318 ptr ? (uint32_t)isInstanceOf(class, obj->class) : 0);
1319 return 0;
1320 }
1321
1322 static int opc_instanceof(struct intrp_ctx *ctx)
1323 {
1324 struct jem_state *jem = &ctx->jem;
1325 Operand *operand = &jem->operand;
1326 int idx = jem->jecr & 0xffff;
1327 int opcode = (jem->jecr >> 16) & 0xff;
1328 Class *class;
1329 ExecEnv *ee = ctx->ee;
1330
1331 operand->uui.u1 = idx;
1332 operand->uui.u2 = opcode;
1333
1334 jam_dprintf("[OPC_INSTANCEOF] index: 0x%x\n", idx);
1335
1336 ctx->frame->last_pc = (CodePntr)jem->jpc;
1337 //resolve the cast class
1338 class = resolveClass(ctx->mb->class, idx, FALSE);
1339
1340 if (exceptionOccured0(ee))
1341 return jem_throwException(ctx);
1342
1343 return opc_instanceof_quick(ctx);
1344 }
1345
1346 static int opc_aastore(struct intrp_ctx *ctx)
1347 {
1348 Object *obj;
1349 uintptr_t *aobj;
1350 int idx ;
1351 Object *array;
1352
1353 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, aobj);
1354 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, idx);
1355 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, array);
1356
1357 jam_dprintf("[OPC_AASTORE] obj %p, index %d, array %p\n", aobj, idx, array);
1358
1359 /* aobj does point to an object, but we do not know if that's an array or
1360 * not, and we need to know that for the arrayStoreCheck() check below */
1361 #warning Does not look right!
1362 if (aobj && (!JAM_ON_STACK || !IS_JAM_OBJECT(aobj) || !IS_JAM_ARRAY(aobj))) {
1363 if (!IS_OBJECT(JAM_OBJECT(aobj))) {
1364 //in case of storing an array to another array
1365 obj = JAM_ARRAY(aobj);
1366 } else {
1367 obj = JAM_OBJECT(aobj);
1368 }
1369 } else
1370 obj = (Object *)aobj;
1371 array = JAM_ARRAY((uintptr_t *)array);
1372
1373 jam_dprintf("[OPC_AASTORE] store obj ref %p of %p to array %p[%d/%d] of %p\n",
1374 obj, obj->class, array, idx, array->instance[0], array->class);
1375 JEM_NULL_POINTER_CHECK(array);
1376
1377 if (idx >= ARRAY_LEN(array)) {
1378 char buff[MAX_INT_DIGITS];
1379 snprintf(buff, MAX_INT_DIGITS, "%d", idx);
1380 JEM_THROW_EXCEPTION("java/lang/ArrayIndexOutOfBoundsException", buff);
1381 }
1382
1383 if (obj != NULL && !arrayStoreCheck(array->class, obj->class))
1384 JEM_THROW_EXCEPTION("java/lang/ArrayStoreException", NULL);
1385
1386 //FIXME: If we set JEM ref here, it is very likely that some native jamvm code would directly offset
1387 // the array to get the non jamvm refs to use, which then causes segfault.
1388 #if JAM_ON_STACK
1389 ((Object**)ARRAY_DATA(array))[idx] = obj;
1390 #else
1391 ((uintptr_t**)ARRAY_DATA(array))[idx] = aobj;
1392 #endif
1393 return 0;
1394 }
1395
1396 static int do_javaExceptions(struct intrp_ctx *ctx)
1397 {
1398 union jecr jecr_u;
1399 struct jem_state *jem = &ctx->jem;
1400
1401 /* deliberate segfault */
1402 /* *(int *)0 = 0; */
1403
1404 jecr_u.i = jem->jecr;
1405 /* This should not happen, because we don't use the "Java Handle" (H)
1406 * bit in the Status Register and we set JBCR to 0x80000000 - still
1407 * it does happen, but seems to be harmless so far. Just ignore. */
1408 if (jecr_u.s.opcode == OPC_AASTORE)
1409 return opc_aastore(ctx);
1410
1411 return 1;
1412 }
1413
1414 static int opc_afireturn(struct intrp_ctx *ctx)
1415 {
1416 uint32_t val;
1417 int ret;
1418 struct jem_state *jem = &ctx->jem;
1419
1420 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, val);
1421
1422 jam_dprintf("[OPC_AFIRETURN] return 0x%08x @ %p, this %p\n",
1423 val, ctx->lvars_jem, ctx->this);
1424
1425 ret = opc_return(ctx);
1426 if (!ret)
1427 ret = ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, val);
1428 else
1429 /* Function returning a value must have local variables */
1430 *ctx->lvars_jem = val;
1431
1432 return ret;
1433 }
1434
1435 static int opc_ldreturn(struct intrp_ctx *ctx)
1436 {
1437 uint64_t val;
1438 int ret;
1439
1440 struct jem_state *jem = &ctx->jem;
1441 ostack_pop_u64(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, val);
1442
1443 jam_dprintf("[OPC_LDRETURN] return %lld\n", val);
1444
1445 ret = opc_return(ctx);
1446
1447 if (!ret)
1448 ret = ostack_push_u64(ctx->frame->ostack, ctx->mb->max_stack,
1449 ctx->ostack, val);
1450 else
1451 /* Function returning a value must have local variables */
1452 *(uint64_t*)ctx->lvars_jem = val;
1453
1454 return ret;
1455 }
1456
1457 static int opc_fcmpg(struct intrp_ctx *ctx)
1458 {
1459 float v1, v2;
1460 int res;
1461 struct jem_state *jem = &ctx->jem;
1462 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v2);
1463 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v1);
1464 if (v1 == v2)
1465 res = 0;
1466 else if (v1 < v2)
1467 res = -1;
1468 else if (v1 > v2)
1469 res = 1;
1470 else
1471 res = 1; /* isNaN */
1472 jam_dprintf("[OPC_FCMPG] result %d\n", res);
1473 ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, res);
1474 return 0;
1475 }
1476
1477 static int opc_fcmpl(struct intrp_ctx *ctx)
1478 {
1479 float v1, v2;
1480 int res;
1481 struct jem_state *jem = &ctx->jem;
1482 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v2);
1483 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v1);
1484 if (v1 == v2)
1485 res = 0;
1486 else if (v1 < v2)
1487 res = -1;
1488 else if (v1 > v2)
1489 res = 1;
1490 else
1491 res = -1;
1492 jam_dprintf("[OPC_FCMPL] result %d\n", res);
1493 ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, res);
1494 return 0;
1495 }
1496
1497 static int opc_i2f(struct intrp_ctx *ctx)
1498 {
1499 int i;
1500 struct jem_state *jem = &ctx->jem;
1501 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, i);
1502
1503 float f = (float)i;
1504 jam_dprintf("[OPC_I2F] convert to %f\n", f);
1505 ostack_push_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, f);
1506 return 0;
1507 }
1508
1509 static int opc_i2d(struct intrp_ctx *ctx)
1510 {
1511 return JEM_TRAP_HANDLER_FINISH;
1512 }
1513
1514 static int opc_fmul(struct intrp_ctx *ctx)
1515 {
1516 float v1, v2;
1517 float ret;
1518 struct jem_state *jem = &ctx->jem;
1519 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v2);
1520 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v1);
1521 ret = v1 * v2;
1522 jam_dprintf("[OPC_FMUL] result %f\n", ret);
1523 ostack_push_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ret);
1524 return 0;
1525 }
1526
1527 static int opc_fadd(struct intrp_ctx *ctx)
1528 {
1529 float v1, v2;
1530 float ret;
1531 struct jem_state *jem = &ctx->jem;
1532 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v2);
1533 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v1);
1534 ret = v1 + v2;
1535 jam_dprintf("[OPC_FADD] result %f\n", ret);
1536 ostack_push_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ret);
1537 return 0;
1538 }
1539
1540 static int opc_fsub(struct intrp_ctx *ctx)
1541 {
1542 float v1, v2;
1543 float ret;
1544 struct jem_state *jem = &ctx->jem;
1545 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v2);
1546 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, v1);
1547 ret = v1 - v2;
1548 jam_dprintf("[OPC_FSUB] result %f\n", ret);
1549 ostack_push_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, ret);
1550 return 0;
1551 }
1552
1553 static int opc_f2i(struct intrp_ctx *ctx)
1554 {
1555 int res;
1556 float value;
1557 struct jem_state *jem = &ctx->jem;
1558 ostack_pop_f32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, value);
1559 jam_dprintf("[OPC_F2I] float value %f\n", value);
1560 if (value >= (float)INT_MAX)
1561 res = INT_MAX;
1562 else if (value <= (float)INT_MIN)
1563 res = INT_MIN;
1564 else if (value != value)
1565 res = 0;
1566 else
1567 res = (int)value;
1568 jam_dprintf("[OPC_F2I] int value %d\n", res);
1569 ostack_push_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, res);
1570 return 0;
1571 }
1572
1573 static int opc_iinc(struct intrp_ctx *ctx)
1574 {
1575 union jecr jecr_u;
1576 jecr_u.i = ctx->jem.jecr;
1577 int index = (int)jecr_u.s.op1;
1578 int con = (int)jecr_u.s.op2;
1579 uintptr_t *ptr = ctx->lvars_jem;
1580
1581 jam_dprintf("[OPC_IINC] add %d to local var %x at %d (%d)\n",
1582 con, ptr[-index], index, ctx->mb->max_locals);
1583 ptr[-index] = ptr[-index] + con;
1584
1585 jam_dprintf("[OPC_IINC] local var is %x now\n", ptr[-index]);
1586 return 0;
1587 }
1588
1589 static int opc_tableswitch(struct intrp_ctx *ctx)
1590 {
1591 /* On entry JPC points to "default" */
1592 int32_t dflt, high, low, *dflt_p;
1593 int32_t idx;
1594 uint32_t target;
1595 uint8_t *tswitch;
1596 int i;
1597
1598 tswitch = (uint8_t *)(ctx->jem.jpc - 3);
1599 dflt_p = (int32_t *)(ctx->jem.jpc & ~3);
1600
1601 dflt = __be32_to_cpu(*dflt_p);
1602 low = __be32_to_cpu(*(dflt_p + 1));
1603 high = __be32_to_cpu(*(dflt_p + 2));
1604
1605 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, idx);
1606
1607 if (idx < low || idx > high)
1608 target = dflt;
1609 else
1610 target = __be32_to_cpu(*(dflt_p + 3 + idx - low));
1611
1612 #ifdef JEM_DEBUG
1613 for (i = 0; i <= high - low; i++) {
1614 int32_t *addr = dflt_p + 3 + i;
1615
1616 if (!(i & 15))
1617 jam_dprintf("%p:", addr);
1618 jam_dprintf(" 0x%x", *addr);
1619 if ((i & 15) == 15 || i == high - low)
1620 jam_dprintf("\n", addr);
1621 }
1622 #endif
1623
1624 jam_dprintf("[%s] trap @%p, jpc 0x%x, default 0x%x @ %p, low %d, high %d, idx %d, target 0x%x\n",
1625 __func__, tswitch, ctx->jem.jpc, dflt, dflt_p, low, high, idx, target);
1626
1627 ctx->jem.jpc = (uint32_t)(tswitch + target);
1628
1629 return 0;
1630 }
1631
1632 static int opc_athrow(struct intrp_ctx *ctx)
1633 {
1634 Object *obj;
1635 ostack_pop_u32(ctx->frame->ostack, ctx->mb->max_stack, ctx->ostack, obj);
1636 ctx->frame->last_pc = (CodePntr)ctx->jem.jpc;
1637 ExecEnv *ee = ctx->ee;
1638
1639 JEM_NULL_POINTER_CHECK(obj);
1640
1641 if (!JAM_ON_STACK || !IS_JAM_OBJECT(obj))
1642 obj = JAM_OBJECT((uintptr_t *)obj);
1643
1644 jam_dprintf("[OPC_ATHROW] throw exception %s\n", CLASS_CB(obj->class)->name);
1645 ee->exception = obj;
1646 return jem_throwException(ctx);
1647 }
1648
1649 static int do_stackOverflow(struct intrp_ctx *ctx)
1650 {
1651 jam_dprintf("[TRAP] STACK OVERFLOW XXXXXXXX\n");
1652 return 0;
1653 }
1654
1655 static int do_stackUnderflow(struct intrp_ctx *ctx)
1656 {
1657 jam_dprintf("[TRAP] STACK UNDERFLOW XXXXXXXX\n");
1658 return 1;
1659 }
1660
1661 static int do_stackOverflow1(struct intrp_ctx *ctx)
1662 {
1663 jam_dprintf("[TRAP] STACK OVERFLOW1XXXXXXXX\n");
1664 return 1;
1665 }
1666
1667 static int do_stackUnderflow1(struct intrp_ctx *ctx)
1668 {
1669 jam_dprintf("[TRAP] STACK UNDERFLOW1XXXXXXXX\n");
1670 return 1;
1671 }
1672
1673 static handler_fn *trap_handler_f[256] = {
1674 [OPC_INVOKEINTERFACE] = opc_invokeinterface,
1675 [OPC_INVOKESPECIAL] = opc_invokespecial,
1676 [OPC_INVOKESUPER_QUICK] = opc_invokesuper_quick,
1677 [OPC_INVOKENONVIRTUAL_QUICK] = opc_invokenonvirtual_quick,
1678 [OPC_INVOKEVIRTUAL] = opc_invokevirtual,
1679 [OPC_INVOKEVIRTUAL_QUICK] = opc_invokevirtual_quick,
1680 [OPC_INVOKESTATIC] = opc_invokestatic,
1681 // [OPC_INVOKESTATIC_QUICK] = opc_invokestatic_quick,
1682 [OPC_NEW] = opc_new,
1683 [0xDD] = opc_new, /* JEM: NEW_QUICK */
1684 [OPC_RETURN] = opc_return,
1685 [OPC_ARETURN] = opc_afireturn,
1686 [OPC_IRETURN] = opc_afireturn,
1687 [OPC_FRETURN] = opc_afireturn,
1688 [OPC_PUTFIELD] = opc_putfield,
1689 // [OPC_PUTFIELD_QUICK] = opc_putfield_quick,
1690 // [OPC_PUTFIELD2_QUICK] = opc_putfield2_quick,
1691 // [OPC_LDC_W_QUICK] = opc_ldc_w_quick,
1692 // [OPC_LDC_QUICK] = opc_ldc_quick,
1693 [OPC_LDC_W] = opc_ldc_w,
1694 [OPC_LDC] = opc_ldc,
1695 [OPC_MONITORENTER] = opc_monitorenter,
1696 [OPC_MONITOREXIT] = opc_monitorexit,
1697 [OPC_GETSTATIC] = opc_getstatic,
1698 // [OPC_GETSTATIC_QUICK] = opc_getstatic_quick,
1699 // [OPC_GETSTATIC2_QUICK] = opc_getstatic2_quick,
1700 [OPC_PUTSTATIC] = opc_putstatic,
1701 [OPC_PUTSTATIC_QUICK] = opc_putstatic_quick,
1702 [OPC_PUTSTATIC2_QUICK] = opc_putstatic2_quick,
1703 [OPC_ANEWARRAY] = opc_anewarray,
1704 [OPC_ANEWARRAY_QUICK] = opc_anewarray_quick,
1705 [OPC_MULTIANEWARRAY] = opc_multianewarray,
1706 [OPC_NEWARRAY] = opc_newarray,
1707 [OPC_CHECKCAST] = opc_checkcast,
1708 [OPC_CHECKCAST_QUICK] = opc_checkcast_quick,
1709 [OPC_GETFIELD] = opc_getfield,
1710 // [OPC_GETFIELD_QUICK] = opc_getfield_quick,
1711 // [OPC_GETFIELD2_QUICK] = opc_getfield2_quick,
1712 [OPC_FCMPL] = opc_fcmpl,
1713 [OPC_FCMPG] = opc_fcmpg,
1714 [OPC_I2F] = opc_i2f,
1715 [OPC_I2D] = opc_i2d,
1716 [OPC_FMUL] = opc_fmul,
1717 // [OPC_FADD] = opc_fadd,
1718 // [OPC_FSUB] = opc_fsub,
1719 [OPC_F2I] = opc_f2i,
1720 [OPC_IINC] = opc_iinc,
1721 [OPC_INSTANCEOF] = opc_instanceof,
1722 [OPC_ATHROW] = opc_athrow,
1723 [OPC_LRETURN] = opc_ldreturn,
1724 [OPC_TABLESWITCH] = opc_tableswitch,
1725 };
1726
1727 static handler_fn *exception_handler_f[] = {
1728 [0] = do_javaExceptions,
1729 [1] = do_stackOverflow,
1730 [2] = do_stackUnderflow,
1731 [3] = do_stackOverflow1,
1732 [4] = do_stackUnderflow1,
1733 };
1734
1735 struct jem_profile {
1736 unsigned long time;
1737 unsigned int n;
1738 };
1739
1740 static struct jem_profile prof[256];
1741
1742 /******************************/
1743 uintptr_t *executeJava(void)
1744 {
1745 /**
1746 * load trap entries to JEM trap table set when initializing JamVM
1747 */
1748 int i;
1749 uint32_t jep;
1750 int done;
1751 #ifdef JEM_PROFILE
1752 static struct timeval tv1, tv2;
1753 #endif
1754 ExecEnv *ee = getExecEnv();
1755
1756 /* Initialize interpreter's static environment */
1757 struct intrp_ctx ctx;
1758 struct jem_state *jem = &ctx.jem;
1759
1760 ctx.ee = ee;
1761 ctx.frame = ee->last_frame;
1762 ctx.mb = ctx.frame->mb;
1763 /*
1764 * We use ostack to save overflowing Java Operand Stack elements. On a stack
1765 * overflow we free a half of the stack (4 elements) to avoid an immediate
1766 * next overflow. When entering a trap, the Operand Stack is saved in a
1767 * temporary array in the reverse order:
1768 * ATTENTION: Looks like ToS is really in r0, not in r7, as JEM manual says
1769 * jos[0] = r7 (?)
1770 * ...
1771 * jos[7 - N] = rN (ToS - N)
1772 * ...
1773 * jos[7] = r0 (ToS)
1774 * UPDATE (27.06.2008)
1775 * I think, actually, the manual is right in some way... If you access
1776 * registers individually _when_ JOSP == N + 1 != 0. If they are read out
1777 * with an ldm, you get this:
1778 * jos[0] = r7 (?)
1779 * ...
1780 * jos[7 - N] = rN (ToS)
1781 * ...
1782 * jos[7] = r0 (ToS - N)
1783 * on an overflow we push r3..r0, i.e., jos[4..7] to the frame stack, and
1784 * set saved JOSP to 4.
1785 */
1786 unsigned long jos[8];
1787
1788 ctx.ostack = ctx.frame->ostack;
1789 ctx.cp = &(CLASS_CB(ctx.mb->class)->constant_pool);
1790 /* End enterpreter's static environment */
1791
1792 //fetch the original pc before prepare direct mb
1793 //TODO:
1794 /* I think, mb->code is indeed a copy of the original code[] array from the
1795 * class object. See class.c::defineClass():390 */
1796
1797 if (ctx.frame->lvars_jem) {
1798 ctx.lvars_jem = ctx.frame->lvars_jem - 1;
1799
1800 GET_THIS(&ctx);
1801 } else {
1802 jam_printf("BUG: lvars_jem == NULL!!!");
1803 exitVM(1);
1804 }
1805
1806 jam_dprintf("[executeJava] ostack %08x locals %d lvars_jem %08x\n",
1807 ctx.ostack, ctx.mb->max_locals, ctx.lvars_jem);
1808 jam_dprintf("[executeJava] execute method %s on class %s\n",
1809 ctx.mb->name, CLASS_CB(ctx.mb->class)->name);
1810
1811 #if 0
1812 /* Don't think we need it, at least, not in the direct.c form. There the code
1813 * is converted into an internal representation, which is useless for JEM */
1814 PREPARE_MB(ctx.mb);//see direct.c (prepare)
1815 #endif
1816
1817 jem->jpc = (unsigned long)ctx.mb->code & ~3;
1818 jam_dprintf("[executeJava] begin on opcode %04x (%04x)\n",
1819 *(char*)jem->jpc, *((char*)jem->jpc + 1));
1820
1821 do {
1822 #ifdef JEM_PROFILE
1823 /* This is not thread-safe. Have to use TLS. */
1824 static
1825 #endif
1826 int opcode;
1827
1828 #ifdef JEM_DEBUG
1829 jam_dprintf("About to enter JEM at 0x%08x, this = %p, class = %p. Code:",
1830 jem->jpc, ctx.this, ctx.this ? ctx.this->class : NULL);
1831 for (i = 0; i < 32 && jem->jpc + i < (unsigned long)(ctx.mb->code + ctx.mb->code_size); i++) {
1832 if (!(i & 0xf))
1833 jam_dprintf("\n0x%04x:", i);
1834 jam_dprintf(" 0x%02x", ((char*)jem->jpc)[i]);
1835 }
1836
1837 jam_dprintf("\nUp to 8 first Local Variables out of %d:\n", ctx.mb->max_locals);
1838 for (i = 0; i < min(8, ctx.mb->max_locals); i++)
1839 jam_dprintf("LVAR_%d: 0x%08x\n", i, *(ctx.lvars_jem - i), ctx.lvars_jem - i);
1840 #endif
1841
1842 /* On entry we need last Java Operand Stack depth, set it not deeper
1843 * than half hardware stack */
1844 jem->josp = min(5, ostack_depth(ctx.frame->ostack, ctx.ostack));
1845 jam_dprintf("Pop %d words to JEM stack from %p:%p\n", jem->josp,
1846 ctx.frame->ostack, ctx.ostack);
1847 /* As long as we are in asm, top jem.josp stack elements belong JEM */
1848 for (i = 0; i < jem->josp; i++)
1849 ostack_pop_u32(ctx.frame->ostack, ctx.mb->max_stack, ctx.ostack,
1850 jos[7 - jem->josp + 1 + i]);
1851
1852 #ifdef JEM_PROFILE
1853 if (tv1.tv_sec) {
1854 gettimeofday(&tv2, NULL);
1855 prof[opcode].time += (tv2.tv_sec - tv1.tv_sec) * 1000000 +
1856 tv2.tv_usec - tv1.tv_usec;
1857 prof[opcode].n++;
1858 }
1859 #endif
1860
1861 __asm__ __volatile__(
1862 ".globl debug_jem_enter\n"
1863 "debug_jem_enter:\n"
1864 " pushm r0-r7,r10-r11\n"
1865 " mov r8, %[cp]\n"
1866 " mov r9, %[lv0]\n"
1867 " mov lr, %[jpc]\n"
1868 " mov r12, %[josp]\n" /* Cannot use %[josp] ... */
1869 " mov r11, %[ostack]\n"
1870 " pushm r11\n" /* Need ostack below */
1871 " ldm r11, r0-r7\n" /* Restore Java Operands */
1872 " cp.w r12, 0\n" /* Test josp == 0 */
1873 " breq 4f\n"
1874 "5: incjosp 1\n" /* ... for loop counter, */
1875 " sub r12, 1\n" /* because it can be */
1876 " brne 5b\n" /* one of r0-r7 */
1877 "4: popjc\n" /* Restore Local Variables */
1878 " sub r10, pc, . - trap\n" /* These 3 instructions */
1879 " retj\n" /* have to stay */
1880 "trap: pushjc\n" /* together */
1881 " mfsr r11, 0x58\n" /* JOSP */
1882 " lsl r11, 28\n" /* Clear r11[31:3] using */
1883 " lsr r11, 28\n" /* one register */
1884 " mov r8, r11\n"
1885 " breq 2f\n"
1886 "3: incjosp -1\n"
1887 " sub r11, 1\n"
1888 " brne 3b\n"
1889 "2: popm r11\n" /* ostack */
1890 " stm r11, r0-r7\n" /* Save Java Operands */
1891 " popm r0-r7,r10-r11\n"
1892 " mov %[tpc], r12\n"
1893 " mov %[jpc], lr\n" /* Resume address */
1894 " mfsr %[jecr], 0x54\n" /* JECR */
1895 " mov %[josp], r8\n" /* JOSP */
1896 " .globl debug_jem_exit\n"
1897 "debug_jem_exit:\n"
1898 : [jecr] "=r" (jem->jecr), [tpc] "=r" (jem->trap_pc),
1899 [josp] "+r" (jem->josp), [jpc] "+r" (jem->jpc)
1900 : [cp] "r" (ctx.cp->info), [lv0] "r" (ctx.lvars_jem),
1901 [ostack] "r" (jos)
1902 : "r8", "r9", "lr", "r12", "memory"
1903 );
1904 /*
1905 * trap_pc now holds trap pc, describing which trap has been entered,
1906 * jecr holds JECR with the trapping bytecode at bits 23..16, possibly
1907 * arguments at bits 7..0 and 15..8,
1908 * josp holds JOSP (JOSP & 0xf),
1909 * jos holds stored registers r7-r0 (note order!) - Java Operand Stack
1910 * jpc points at the trapping opcode, in case of exceptions and stack
1911 * over- and underflows, and at the next opcode, in case of a trap
1912 */
1913
1914 #ifdef JEM_PROFILE
1915 gettimeofday(&tv1, NULL);
1916 #endif
1917
1918 for (i = 0; i < jem->josp; i++)
1919 ostack_push_u32(ctx.frame->ostack, ctx.mb->max_stack, ctx.ostack,
1920 jos[7 - i]);
1921
1922 opcode = (jem->jecr >> 16) & 0xff;
1923
1924 jep = jem->trap_pc & 0xfff;
1925
1926 trap_debug(&ctx);
1927 if (jep < 0x280)
1928 done = exception_handler_f[jep >> 7](&ctx);
1929 else if (trap_handler_f[opcode])
1930 done = trap_handler_f[opcode](&ctx);
1931 else {
1932 /* Unimplemented */
1933 jam_printf("Unimplemented Java Opcode 0x%02x\n", opcode);
1934 exitVM(1);
1935 }
1936
1937 #ifdef JEM_DEBUG
1938 usleep(100);
1939 #endif
1940 } while (done != JEM_TRAP_HANDLER_FINISH);
1941
1942 return ctx.ostack;
1943
1944 // DISPATCH_FIRST;
1945
1946 jam_dprintf("Unknown Java Opcodes\n");
1947 exitVM(1);
1948 }
1949
1950 #ifndef executeJava
1951 void initialiseInterpreter(InitArgs *args) {
1952 initialiseDirect(args);
1953 }
1954 #endif
1955
1956 void dump_profile(void)
1957 {
1958 #ifdef JEM_PROFILE
1959 int i;
1960
1961 for (i = 0; i < 256; i++)
1962 if (prof[i].n)
1963 jam_printf("0x%x:\t%u times,\t%lu usec\n", i, prof[i].n, prof[i].time);
1964 #endif
1965 }
Java Extension Module for JamVM on AVR32