1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "nativeInst_ppc.hpp"
32 #include "oops/compiledICHolder.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "prims/jvmtiExport.hpp"
35 #include "register_ppc.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/signature.hpp"
38 #include "runtime/vframeArray.hpp"
39 #include "utilities/macros.hpp"
40 #include "vmreg_ppc.inline.hpp"
41 #if INCLUDE_ALL_GCS
42 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
43 #endif
44
45 // Implementation of StubAssembler
46
47 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
48 address entry_point, int number_of_arguments) {
49 set_num_rt_args(0); // Nothing on stack
50 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
51 oop_result1 != metadata_result, "registers must be different");
52
53 // Currently no stack banging. We assume that there are enough
54 // StackShadowPages (which have been banged in generate_stack_overflow_check)
55 // for the stub frame and the runtime frames.
56
57 set_last_Java_frame(R1_SP, noreg);
58
59 // ARG1 must hold thread address.
60 mr(R3_ARG1, R16_thread);
61
62 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
63
64 reset_last_Java_frame();
65
66 // Check for pending exceptions.
67 {
68 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
69 cmpdi(CCR0, R0, 0);
70
71 // This used to conditionally jump to forward_exception however it is
72 // possible if we relocate that the branch will not reach. So we must jump
73 // around so we can always reach.
74
75 Label ok;
76 beq(CCR0, ok);
77
78 // Make sure that the vm_results are cleared.
79 if (oop_result1->is_valid() || metadata_result->is_valid()) {
80 li(R0, 0);
81 if (oop_result1->is_valid()) {
82 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
83 }
84 if (metadata_result->is_valid()) {
85 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
86 }
87 }
88
89 if (frame_size() == no_frame_size) {
90 ShouldNotReachHere(); // We always have a frame size.
91 //pop_frame(); // pop the stub frame
92 //ld(R0, _abi(lr), R1_SP);
93 //mtlr(R0);
94 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
95 //mtctr(R0);
96 //bctr();
97 } else if (_stub_id == Runtime1::forward_exception_id) {
98 should_not_reach_here();
99 } else {
100 // keep stub frame for next call_RT
101 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
102 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
103 mtctr(R0);
104 bctr();
105 }
106
107 bind(ok);
108 }
109
110 // Get oop results if there are any and reset the values in the thread.
111 if (oop_result1->is_valid()) {
112 get_vm_result(oop_result1);
113 }
114 if (metadata_result->is_valid()) {
115 get_vm_result_2(metadata_result);
116 }
117
118 return (int)(return_pc - code_section()->start());
119 }
120
121
122 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
123 mr_if_needed(R4_ARG2, arg1);
124 return call_RT(oop_result1, metadata_result, entry, 1);
125 }
126
127
128 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
129 mr_if_needed(R4_ARG2, arg1);
130 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
131 return call_RT(oop_result1, metadata_result, entry, 2);
132 }
133
134
135 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
136 mr_if_needed(R4_ARG2, arg1);
137 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
138 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
139 return call_RT(oop_result1, metadata_result, entry, 3);
140 }
141
142
143 // Implementation of Runtime1
144
145 #define __ sasm->
146
147 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
148 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
149 static int frame_size_in_bytes = -1;
150
151 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
152 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
153 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
154 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
155 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
156
157 int i;
158 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
159 Register r = as_Register(i);
160 if (FrameMap::reg_needs_save(r)) {
161 int sp_offset = cpu_reg_save_offsets[i];
162 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
163 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
164 }
165 }
166
167 if (save_fpu_registers) {
168 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
169 FloatRegister r = as_FloatRegister(i);
170 int sp_offset = fpu_reg_save_offsets[i];
171 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
172 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
173 }
174 }
175
176 return oop_map;
177 }
178
179 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
180 Register ret_pc = noreg, int stack_preserve = 0) {
181 if (ret_pc == noreg) {
182 ret_pc = R0;
183 __ mflr(ret_pc);
184 }
185 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method.
186 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
187
188 // Record volatile registers as callee-save values in an OopMap so
189 // their save locations will be propagated to the caller frame's
190 // RegisterMap during StackFrameStream construction (needed for
191 // deoptimization; see compiledVFrame::create_stack_value).
192 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
193
194 int i;
195 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
196 Register r = as_Register(i);
197 if (FrameMap::reg_needs_save(r)) {
198 int sp_offset = cpu_reg_save_offsets[i];
199 __ std(r, sp_offset + STACK_BIAS, R1_SP);
200 }
201 }
202
203 if (save_fpu_registers) {
204 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
205 FloatRegister r = as_FloatRegister(i);
206 int sp_offset = fpu_reg_save_offsets[i];
207 __ stfd(r, sp_offset + STACK_BIAS, R1_SP);
208 }
209 }
210
211 return generate_oop_map(sasm, save_fpu_registers);
212 }
213
214 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
215 bool restore_fpu_registers = true) {
216 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
217 Register r = as_Register(i);
218 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
219 int sp_offset = cpu_reg_save_offsets[i];
220 __ ld(r, sp_offset + STACK_BIAS, R1_SP);
221 }
222 }
223
224 if (restore_fpu_registers) {
225 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
226 FloatRegister r = as_FloatRegister(i);
227 int sp_offset = fpu_reg_save_offsets[i];
228 __ lfd(r, sp_offset + STACK_BIAS, R1_SP);
229 }
230 }
231
232 __ pop_frame();
233 __ ld(R0, _abi(lr), R1_SP);
234 __ mtlr(R0);
235 }
236
237
238 void Runtime1::initialize_pd() {
239 int i;
240 int sp_offset = frame::abi_reg_args_size;
241
242 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
243 Register r = as_Register(i);
244 if (FrameMap::reg_needs_save(r)) {
245 cpu_reg_save_offsets[i] = sp_offset;
246 sp_offset += BytesPerWord;
247 }
248 }
249
250 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
251 fpu_reg_save_offsets[i] = sp_offset;
252 sp_offset += BytesPerWord;
253 }
254 frame_size_in_bytes = align_size_up(sp_offset, frame::alignment_in_bytes);
255 }
256
257
258 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
259 // Make a frame and preserve the caller's caller-save registers.
260 OopMap* oop_map = save_live_registers(sasm);
261
262 int call_offset;
263 if (!has_argument) {
264 call_offset = __ call_RT(noreg, noreg, target);
265 } else {
266 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
267 }
268 OopMapSet* oop_maps = new OopMapSet();
269 oop_maps->add_gc_map(call_offset, oop_map);
270
271 __ should_not_reach_here();
272 return oop_maps;
273 }
274
275 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
276 int stack_parms) {
277 // Make a frame and preserve the caller's caller-save registers.
278 const int parm_size_in_bytes = align_size_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
279 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
280 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
281
282 int call_offset = 0;
283 switch (stack_parms) {
284 case 3:
285 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
286 case 2:
287 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
288 case 1:
289 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
290 call_offset = __ call_RT(noreg, noreg, target);
291 break;
292 default: Unimplemented(); break;
293 }
294 OopMapSet* oop_maps = new OopMapSet();
295 oop_maps->add_gc_map(call_offset, oop_map);
296
297 __ should_not_reach_here();
298 return oop_maps;
299 }
300
301
302 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
303 Register arg1, Register arg2, Register arg3) {
304 // Make a frame and preserve the caller's caller-save registers.
305 OopMap* oop_map = save_live_registers(sasm);
306
307 int call_offset;
308 if (arg1 == noreg) {
309 call_offset = __ call_RT(result, noreg, target);
310 } else if (arg2 == noreg) {
311 call_offset = __ call_RT(result, noreg, target, arg1);
312 } else if (arg3 == noreg) {
313 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
314 } else {
315 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
316 }
317 OopMapSet* oop_maps = new OopMapSet();
318 oop_maps->add_gc_map(call_offset, oop_map);
319
320 restore_live_registers(sasm, result, noreg);
321 __ blr();
322 return oop_maps;
323 }
324
325 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
326 int stack_parms, bool do_return = true) {
327 // Make a frame and preserve the caller's caller-save registers.
328 const int parm_size_in_bytes = align_size_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
329 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
330 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
331
332 int call_offset = 0;
333 switch (stack_parms) {
334 case 3:
335 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
336 case 2:
337 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
338 case 1:
339 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
340 call_offset = __ call_RT(result, noreg, target);
341 break;
342 default: Unimplemented(); break;
343 }
344 OopMapSet* oop_maps = new OopMapSet();
345 oop_maps->add_gc_map(call_offset, oop_map);
346
347 restore_live_registers(sasm, result, noreg);
348 if (do_return) __ blr();
349 return oop_maps;
350 }
351
352
353 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
354 // Make a frame and preserve the caller's caller-save registers.
355 OopMap* oop_map = save_live_registers(sasm);
356
357 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
358 int call_offset = __ call_RT(noreg, noreg, target);
359 OopMapSet* oop_maps = new OopMapSet();
360 oop_maps->add_gc_map(call_offset, oop_map);
361 __ cmpdi(CCR0, R3_RET, 0);
362
363 // Re-execute the patched instruction or, if the nmethod was deoptmized,
364 // return to the deoptimization handler entry that will cause re-execution
365 // of the current bytecode.
366 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
367 assert(deopt_blob != NULL, "deoptimization blob must have been created");
368
369 // Return to the deoptimization handler entry for unpacking and rexecute.
370 // If we simply returned the we'd deopt as if any call we patched had just
371 // returned.
372
373 restore_live_registers(sasm, noreg, noreg);
374 // Return if patching routine returned 0.
375 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
376
377 address stub = deopt_blob->unpack_with_reexecution();
378 //__ load_const_optimized(R0, stub);
379 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
380 __ mtctr(R0);
381 __ bctr();
382
383 return oop_maps;
384 }
385
386 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
387 OopMapSet* oop_maps = NULL;
388
389 // For better readability.
390 const bool must_gc_arguments = true;
391 const bool dont_gc_arguments = false;
392
393 // Stub code & info for the different stubs.
394 switch (id) {
395 case forward_exception_id:
396 {
397 oop_maps = generate_handle_exception(id, sasm);
398 }
399 break;
400
401 case new_instance_id:
402 case fast_new_instance_id:
403 case fast_new_instance_init_check_id:
404 {
405 if (id == new_instance_id) {
406 __ set_info("new_instance", dont_gc_arguments);
407 } else if (id == fast_new_instance_id) {
408 __ set_info("fast new_instance", dont_gc_arguments);
409 } else {
410 assert(id == fast_new_instance_init_check_id, "bad StubID");
411 __ set_info("fast new_instance init check", dont_gc_arguments);
412 }
413 // We don't support eden allocation.
414 // if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
415 // UseTLAB && FastTLABRefill) {
416 // if (id == fast_new_instance_init_check_id) {
417 // // make sure the klass is initialized
418 // __ lbz(R0, in_bytes(InstanceKlass::init_state_offset()), R3_ARG1);
419 // __ cmpwi(CCR0, R0, InstanceKlass::fully_initialized);
420 // __ bne(CCR0, slow_path);
421 // }
422 //#ifdef ASSERT
423 // // assert object can be fast path allocated
424 // {
425 // Label ok, not_ok;
426 // __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R3_ARG1);
427 // // make sure it's an instance (LH > 0)
428 // __ cmpwi(CCR0, R0, 0);
429 // __ ble(CCR0, not_ok);
430 // __ testbitdi(CCR0, R0, R0, Klass::_lh_instance_slow_path_bit);
431 // __ beq(CCR0, ok);
432 //
433 // __ bind(not_ok);
434 // __ stop("assert(can be fast path allocated)");
435 // __ bind(ok);
436 // }
437 //#endif // ASSERT
438 // // We don't support eden allocation.
439 // __ bind(slow_path);
440 // }
441 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
442 }
443 break;
444
445 case counter_overflow_id:
446 // Bci and method are on stack.
447 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
448 break;
449
450 case new_type_array_id:
451 case new_object_array_id:
452 {
453 if (id == new_type_array_id) {
454 __ set_info("new_type_array", dont_gc_arguments);
455 } else {
456 __ set_info("new_object_array", dont_gc_arguments);
457 }
458
459 #ifdef ASSERT
460 // Assert object type is really an array of the proper kind.
461 {
462 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
463 Label ok;
464 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
465 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
466 __ cmpwi(CCR0, R0, tag);
467 __ beq(CCR0, ok);
468 __ stop("assert(is an array klass)");
469 __ should_not_reach_here();
470 __ bind(ok);
471 }
472 #endif // ASSERT
473
474 // We don't support eden allocation.
475
476 if (id == new_type_array_id) {
477 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
478 } else {
479 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
480 }
481 }
482 break;
483
484 case new_multi_array_id:
485 {
486 // R4: klass
487 // R5: rank
488 // R6: address of 1st dimension
489 __ set_info("new_multi_array", dont_gc_arguments);
490 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
491 }
492 break;
493
494 case register_finalizer_id:
495 {
496 __ set_info("register_finalizer", dont_gc_arguments);
497 // This code is called via rt_call. Hence, caller-save registers have been saved.
498 Register t = R11_scratch1;
499
500 // Load the klass and check the has finalizer flag.
501 __ load_klass(t, R3_ARG1);
502 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
503 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
504 // Return if has_finalizer bit == 0 (CR0.eq).
505 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
506
507 __ mflr(R0);
508 __ std(R0, _abi(lr), R1_SP);
509 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
510 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
511 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
512 int call_offset = __ call_RT(noreg, noreg,
513 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
514 oop_maps = new OopMapSet();
515 oop_maps->add_gc_map(call_offset, oop_map);
516
517 __ pop_frame();
518 __ ld(R0, _abi(lr), R1_SP);
519 __ mtlr(R0);
520 __ blr();
521 }
522 break;
523
524 case throw_range_check_failed_id:
525 {
526 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
527 __ std(R0, -8, R1_SP); // Pass index on stack.
528 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 1);
529 }
530 break;
531
532 case throw_index_exception_id:
533 {
534 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
535 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
536 }
537 break;
538
539 case throw_div0_exception_id:
540 {
541 __ set_info("throw_div0_exception", dont_gc_arguments);
542 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
543 }
544 break;
545
546 case throw_null_pointer_exception_id:
547 {
548 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
549 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
550 }
551 break;
552
553 case handle_exception_nofpu_id:
554 case handle_exception_id:
555 {
556 __ set_info("handle_exception", dont_gc_arguments);
557 oop_maps = generate_handle_exception(id, sasm);
558 }
559 break;
560
561 case handle_exception_from_callee_id:
562 {
563 __ set_info("handle_exception_from_callee", dont_gc_arguments);
564 oop_maps = generate_handle_exception(id, sasm);
565 }
566 break;
567
568 case unwind_exception_id:
569 {
570 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
571 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
572 Rexception_save = R31, Rcaller_sp = R30;
573 __ set_info("unwind_exception", dont_gc_arguments);
574
575 __ ld(Rcaller_sp, 0, R1_SP);
576 __ push_frame_reg_args(0, R0); // dummy frame for C call
577 __ mr(Rexception_save, Rexception); // save over C call
578 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
579 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
580 __ verify_not_null_oop(Rexception_save);
581 __ mtctr(R3_RET);
582 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
583 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
584 __ mr(Rexception, Rexception_save); // restore
585 __ mtlr(Rexception_pc);
586 __ bctr();
587 }
588 break;
589
590 case throw_array_store_exception_id:
591 {
592 __ set_info("throw_array_store_exception", dont_gc_arguments);
593 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
594 }
595 break;
596
597 case throw_class_cast_exception_id:
598 {
599 __ set_info("throw_class_cast_exception", dont_gc_arguments);
600 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
601 }
602 break;
603
604 case throw_incompatible_class_change_error_id:
605 {
606 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
607 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
608 }
609 break;
610
611 case slow_subtype_check_id:
612 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
613 const Register sub_klass = R5,
614 super_klass = R4,
615 temp1_reg = R6,
616 temp2_reg = R0;
617 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
618 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
619 __ blr();
620 }
621 break;
622
623 case monitorenter_nofpu_id:
624 case monitorenter_id:
625 {
626 __ set_info("monitorenter", dont_gc_arguments);
627
628 int save_fpu_registers = (id == monitorenter_id);
629 // Make a frame and preserve the caller's caller-save registers.
630 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
631
632 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
633
634 oop_maps = new OopMapSet();
635 oop_maps->add_gc_map(call_offset, oop_map);
636
637 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
638 __ blr();
639 }
640 break;
641
642 case monitorexit_nofpu_id:
643 case monitorexit_id:
644 {
645 // note: Really a leaf routine but must setup last java sp
646 // => use call_RT for now (speed can be improved by
647 // doing last java sp setup manually).
648 __ set_info("monitorexit", dont_gc_arguments);
649
650 int save_fpu_registers = (id == monitorexit_id);
651 // Make a frame and preserve the caller's caller-save registers.
652 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
653
654 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
655
656 oop_maps = new OopMapSet();
657 oop_maps->add_gc_map(call_offset, oop_map);
658
659 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
660 __ blr();
661 }
662 break;
663
664 case deoptimize_id:
665 {
666 __ set_info("deoptimize", dont_gc_arguments);
667 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
668 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
669
670 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
671 assert(deopt_blob != NULL, "deoptimization blob must have been created");
672 address stub = deopt_blob->unpack_with_reexecution();
673 //__ load_const_optimized(R0, stub);
674 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
675 __ mtctr(R0);
676 __ bctr();
677 }
678 break;
679
680 case access_field_patching_id:
681 {
682 __ set_info("access_field_patching", dont_gc_arguments);
683 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
684 }
685 break;
686
687 case load_klass_patching_id:
688 {
689 __ set_info("load_klass_patching", dont_gc_arguments);
690 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
691 }
692 break;
693
694 case load_mirror_patching_id:
695 {
696 __ set_info("load_mirror_patching", dont_gc_arguments);
697 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
698 }
699 break;
700
701 case load_appendix_patching_id:
702 {
703 __ set_info("load_appendix_patching", dont_gc_arguments);
704 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
705 }
706 break;
707
708 case dtrace_object_alloc_id:
709 { // O0: object
710 __ unimplemented("stub dtrace_object_alloc_id");
711 __ set_info("dtrace_object_alloc", dont_gc_arguments);
712 // // We can't gc here so skip the oopmap but make sure that all
713 // // the live registers get saved.
714 // save_live_registers(sasm);
715 //
716 // __ save_thread(L7_thread_cache);
717 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
718 // relocInfo::runtime_call_type);
719 // __ delayed()->mov(I0, O0);
720 // __ restore_thread(L7_thread_cache);
721 //
722 // restore_live_registers(sasm);
723 // __ ret();
724 // __ delayed()->restore();
725 }
726 break;
727
728 #if INCLUDE_ALL_GCS
729 case g1_pre_barrier_slow_id:
730 {
731 BarrierSet* bs = Universe::heap()->barrier_set();
732 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
733 goto unimplemented_entry;
734 }
735
736 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
737
738 // Using stack slots: pre_val (pre-pushed), spill tmp, spill tmp2.
739 const int stack_slots = 3;
740 Register pre_val = R0; // previous value of memory
741 Register tmp = R14;
742 Register tmp2 = R15;
743
744 Label refill, restart;
745 int satb_q_index_byte_offset =
746 in_bytes(JavaThread::satb_mark_queue_offset() +
747 SATBMarkQueue::byte_offset_of_index());
748 int satb_q_buf_byte_offset =
749 in_bytes(JavaThread::satb_mark_queue_offset() +
750 SATBMarkQueue::byte_offset_of_buf());
751
752 // Spill
753 __ std(tmp, -16, R1_SP);
754 __ std(tmp2, -24, R1_SP);
755
756 __ bind(restart);
757 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
758 // size_t so ld_ptr is appropriate.
759 __ ld(tmp, satb_q_index_byte_offset, R16_thread);
760
761 // index == 0?
762 __ cmpdi(CCR0, tmp, 0);
763 __ beq(CCR0, refill);
764
765 __ ld(tmp2, satb_q_buf_byte_offset, R16_thread);
766 __ ld(pre_val, -8, R1_SP); // Load from stack.
767 __ addi(tmp, tmp, -oopSize);
768
769 __ std(tmp, satb_q_index_byte_offset, R16_thread);
770 __ stdx(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
771
772 // Restore temp registers and return-from-leaf.
773 __ ld(tmp2, -24, R1_SP);
774 __ ld(tmp, -16, R1_SP);
775 __ blr();
776
777 __ bind(refill);
778 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
779 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
780 __ mflr(R0);
781 __ std(R0, _abi(lr), R1_SP);
782 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
783 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), R16_thread);
784 __ pop_frame();
785 __ ld(R0, _abi(lr), R1_SP);
786 __ mtlr(R0);
787 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
788 __ b(restart);
789 }
790 break;
791
792 case g1_post_barrier_slow_id:
793 {
794 BarrierSet* bs = Universe::heap()->barrier_set();
795 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
796 goto unimplemented_entry;
797 }
798
799 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
800
801 // Using stack slots: spill addr, spill tmp2
802 const int stack_slots = 2;
803 Register tmp = R0;
804 Register addr = R14;
805 Register tmp2 = R15;
806 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base;
807
808 Label restart, refill, ret;
809
810 // Spill
811 __ std(addr, -8, R1_SP);
812 __ std(tmp2, -16, R1_SP);
813
814 __ srdi(addr, R0, CardTableModRefBS::card_shift); // Addr is passed in R0.
815 __ load_const_optimized(/*cardtable*/ tmp2, byte_map_base, tmp);
816 __ add(addr, tmp2, addr);
817 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
818
819 // Return if young card.
820 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::g1_young_card_val());
821 __ beq(CCR0, ret);
822
823 // Return if sequential consistent value is already dirty.
824 __ membar(Assembler::StoreLoad);
825 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
826
827 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::dirty_card_val());
828 __ beq(CCR0, ret);
829
830 // Not dirty.
831
832 // First, dirty it.
833 __ li(tmp, G1SATBCardTableModRefBS::dirty_card_val());
834 __ stb(tmp, 0, addr);
835
836 int dirty_card_q_index_byte_offset =
837 in_bytes(JavaThread::dirty_card_queue_offset() +
838 DirtyCardQueue::byte_offset_of_index());
839 int dirty_card_q_buf_byte_offset =
840 in_bytes(JavaThread::dirty_card_queue_offset() +
841 DirtyCardQueue::byte_offset_of_buf());
842
843 __ bind(restart);
844
845 // Get the index into the update buffer. DirtyCardQueue::_index is
846 // a size_t so ld_ptr is appropriate here.
847 __ ld(tmp2, dirty_card_q_index_byte_offset, R16_thread);
848
849 // index == 0?
850 __ cmpdi(CCR0, tmp2, 0);
851 __ beq(CCR0, refill);
852
853 __ ld(tmp, dirty_card_q_buf_byte_offset, R16_thread);
854 __ addi(tmp2, tmp2, -oopSize);
855
856 __ std(tmp2, dirty_card_q_index_byte_offset, R16_thread);
857 __ add(tmp2, tmp, tmp2);
858 __ std(addr, 0, tmp2); // [_buf + index] := <address_of_card>
859
860 // Restore temp registers and return-from-leaf.
861 __ bind(ret);
862 __ ld(tmp2, -16, R1_SP);
863 __ ld(addr, -8, R1_SP);
864 __ blr();
865
866 __ bind(refill);
867 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
868 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
869 __ mflr(R0);
870 __ std(R0, _abi(lr), R1_SP);
871 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
872 __ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), R16_thread);
873 __ pop_frame();
874 __ ld(R0, _abi(lr), R1_SP);
875 __ mtlr(R0);
876 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
877 __ b(restart);
878 }
879 break;
880 #endif // INCLUDE_ALL_GCS
881
882 case predicate_failed_trap_id:
883 {
884 __ set_info("predicate_failed_trap", dont_gc_arguments);
885 OopMap* oop_map = save_live_registers(sasm);
886
887 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
888
889 oop_maps = new OopMapSet();
890 oop_maps->add_gc_map(call_offset, oop_map);
891
892 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
893 assert(deopt_blob != NULL, "deoptimization blob must have been created");
894 restore_live_registers(sasm, noreg, noreg);
895
896 address stub = deopt_blob->unpack_with_reexecution();
897 //__ load_const_optimized(R0, stub);
898 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
899 __ mtctr(R0);
900 __ bctr();
901 }
902 break;
903
904 default:
905 unimplemented_entry:
906 {
907 __ set_info("unimplemented entry", dont_gc_arguments);
908 __ mflr(R0);
909 __ std(R0, _abi(lr), R1_SP);
910 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
911 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
912 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
913
914 __ load_const_optimized(R4_ARG2, (int)id);
915 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
916
917 oop_maps = new OopMapSet();
918 oop_maps->add_gc_map(call_offset, oop_map);
919 __ should_not_reach_here();
920 }
921 break;
922 }
923 return oop_maps;
924 }
925
926
927 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
928 __ block_comment("generate_handle_exception");
929
930 // Save registers, if required.
931 OopMapSet* oop_maps = new OopMapSet();
932 OopMap* oop_map = NULL;
933 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
934 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
935
936 switch (id) {
937 case forward_exception_id:
938 // We're handling an exception in the context of a compiled frame.
939 // The registers have been saved in the standard places. Perform
940 // an exception lookup in the caller and dispatch to the handler
941 // if found. Otherwise unwind and dispatch to the callers
942 // exception handler.
943 oop_map = generate_oop_map(sasm, true);
944 // Transfer the pending exception to the exception_oop.
945 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
946 // but we support additional slots in the frame for parameter passing.
947 __ ld(Rexception_pc, 0, R1_SP);
948 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
949 __ li(R0, 0);
950 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
951 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
952 break;
953 case handle_exception_nofpu_id:
954 case handle_exception_id:
955 // At this point all registers MAY be live.
956 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
957 break;
958 case handle_exception_from_callee_id:
959 // At this point all registers except exception oop and exception pc are dead.
960 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
961 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
962 __ std(Rexception_pc, _abi(lr), R1_SP);
963 __ push_frame(frame_size_in_bytes, R0);
964 break;
965 default: ShouldNotReachHere();
966 }
967
968 __ verify_not_null_oop(Rexception);
969
970 #ifdef ASSERT
971 // Check that fields in JavaThread for exception oop and issuing pc are
972 // empty before writing to them.
973 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
974 __ cmpdi(CCR0, R0, 0);
975 __ asm_assert_eq("exception oop already set", 0x963);
976 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
977 __ cmpdi(CCR0, R0, 0);
978 __ asm_assert_eq("exception pc already set", 0x962);
979 #endif
980
981 // Save the exception and issuing pc in the thread.
982 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
983 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
984
985 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
986 oop_maps->add_gc_map(call_offset, oop_map);
987
988 __ mtctr(R3_RET);
989
990 // Note: if nmethod has been deoptimized then regardless of
991 // whether it had a handler or not we will deoptimize
992 // by entering the deopt blob with a pending exception.
993
994 // Restore the registers that were saved at the beginning, remove
995 // the frame and jump to the exception handler.
996 switch (id) {
997 case forward_exception_id:
998 case handle_exception_nofpu_id:
999 case handle_exception_id:
1000 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
1001 __ bctr();
1002 break;
1003 case handle_exception_from_callee_id: {
1004 __ pop_frame();
1005 __ ld(Rexception_pc, _abi(lr), R1_SP);
1006 __ mtlr(Rexception_pc);
1007 __ bctr();
1008 break;
1009 }
1010 default: ShouldNotReachHere();
1011 }
1012
1013 return oop_maps;
1014 }
1015
1016 const char *Runtime1::pd_name_for_address(address entry) {
1017 return "<unknown function>";
1018 }
1019
1020 #undef __