1 /*
2 * Copyright (c) 1999, 2017, 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/align.hpp"
40 #include "utilities/macros.hpp"
41 #include "vmreg_ppc.inline.hpp"
42 #if INCLUDE_ALL_GCS
43 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
44 #endif
45
46 // Implementation of StubAssembler
47
48 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
49 address entry_point, int number_of_arguments) {
50 set_num_rt_args(0); // Nothing on stack
51 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
52 oop_result1 != metadata_result, "registers must be different");
53
54 // Currently no stack banging. We assume that there are enough
55 // StackShadowPages (which have been banged in generate_stack_overflow_check)
56 // for the stub frame and the runtime frames.
57
58 set_last_Java_frame(R1_SP, noreg);
59
60 // ARG1 must hold thread address.
61 mr(R3_ARG1, R16_thread);
62
63 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
64
65 reset_last_Java_frame();
66
67 // Check for pending exceptions.
68 {
69 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
70 cmpdi(CCR0, R0, 0);
71
72 // This used to conditionally jump to forward_exception however it is
73 // possible if we relocate that the branch will not reach. So we must jump
74 // around so we can always reach.
75
76 Label ok;
77 beq(CCR0, ok);
78
79 // Make sure that the vm_results are cleared.
80 if (oop_result1->is_valid() || metadata_result->is_valid()) {
81 li(R0, 0);
82 if (oop_result1->is_valid()) {
83 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
84 }
85 if (metadata_result->is_valid()) {
86 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
87 }
88 }
89
90 if (frame_size() == no_frame_size) {
91 ShouldNotReachHere(); // We always have a frame size.
92 //pop_frame(); // pop the stub frame
93 //ld(R0, _abi(lr), R1_SP);
94 //mtlr(R0);
95 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
96 //mtctr(R0);
97 //bctr();
98 } else if (_stub_id == Runtime1::forward_exception_id) {
99 should_not_reach_here();
100 } else {
101 // keep stub frame for next call_RT
102 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
103 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
104 mtctr(R0);
105 bctr();
106 }
107
108 bind(ok);
109 }
110
111 // Get oop results if there are any and reset the values in the thread.
112 if (oop_result1->is_valid()) {
113 get_vm_result(oop_result1);
114 }
115 if (metadata_result->is_valid()) {
116 get_vm_result_2(metadata_result);
117 }
118
119 return (int)(return_pc - code_section()->start());
120 }
121
122
123 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
124 mr_if_needed(R4_ARG2, arg1);
125 return call_RT(oop_result1, metadata_result, entry, 1);
126 }
127
128
129 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
130 mr_if_needed(R4_ARG2, arg1);
131 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
132 return call_RT(oop_result1, metadata_result, entry, 2);
133 }
134
135
136 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
137 mr_if_needed(R4_ARG2, arg1);
138 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
139 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
140 return call_RT(oop_result1, metadata_result, entry, 3);
141 }
142
143
144 // Implementation of Runtime1
145
146 #define __ sasm->
147
148 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
149 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
150 static int frame_size_in_bytes = -1;
151
152 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
153 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
154 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
155 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
156 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
157
158 int i;
159 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
160 Register r = as_Register(i);
161 if (FrameMap::reg_needs_save(r)) {
162 int sp_offset = cpu_reg_save_offsets[i];
163 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
164 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
165 }
166 }
167
168 if (save_fpu_registers) {
169 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
170 FloatRegister r = as_FloatRegister(i);
171 int sp_offset = fpu_reg_save_offsets[i];
172 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
173 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
174 }
175 }
176
177 return oop_map;
178 }
179
180 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
181 Register ret_pc = noreg, int stack_preserve = 0) {
182 if (ret_pc == noreg) {
183 ret_pc = R0;
184 __ mflr(ret_pc);
185 }
186 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method.
187 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
188
189 // Record volatile registers as callee-save values in an OopMap so
190 // their save locations will be propagated to the caller frame's
191 // RegisterMap during StackFrameStream construction (needed for
192 // deoptimization; see compiledVFrame::create_stack_value).
193 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
194
195 int i;
196 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
197 Register r = as_Register(i);
198 if (FrameMap::reg_needs_save(r)) {
199 int sp_offset = cpu_reg_save_offsets[i];
200 __ std(r, sp_offset + STACK_BIAS, R1_SP);
201 }
202 }
203
204 if (save_fpu_registers) {
205 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
206 FloatRegister r = as_FloatRegister(i);
207 int sp_offset = fpu_reg_save_offsets[i];
208 __ stfd(r, sp_offset + STACK_BIAS, R1_SP);
209 }
210 }
211
212 return generate_oop_map(sasm, save_fpu_registers);
213 }
214
215 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
216 bool restore_fpu_registers = true) {
217 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
218 Register r = as_Register(i);
219 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
220 int sp_offset = cpu_reg_save_offsets[i];
221 __ ld(r, sp_offset + STACK_BIAS, R1_SP);
222 }
223 }
224
225 if (restore_fpu_registers) {
226 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
227 FloatRegister r = as_FloatRegister(i);
228 int sp_offset = fpu_reg_save_offsets[i];
229 __ lfd(r, sp_offset + STACK_BIAS, R1_SP);
230 }
231 }
232
233 __ pop_frame();
234 __ ld(R0, _abi(lr), R1_SP);
235 __ mtlr(R0);
236 }
237
238
239 void Runtime1::initialize_pd() {
240 int i;
241 int sp_offset = frame::abi_reg_args_size;
242
243 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
244 Register r = as_Register(i);
245 if (FrameMap::reg_needs_save(r)) {
246 cpu_reg_save_offsets[i] = sp_offset;
247 sp_offset += BytesPerWord;
248 }
249 }
250
251 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
252 fpu_reg_save_offsets[i] = sp_offset;
253 sp_offset += BytesPerWord;
254 }
255 frame_size_in_bytes = align_up(sp_offset, (int)frame::alignment_in_bytes);
256 }
257
258
259 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
260 // Make a frame and preserve the caller's caller-save registers.
261 OopMap* oop_map = save_live_registers(sasm);
262
263 int call_offset;
264 if (!has_argument) {
265 call_offset = __ call_RT(noreg, noreg, target);
266 } else {
267 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
268 }
269 OopMapSet* oop_maps = new OopMapSet();
270 oop_maps->add_gc_map(call_offset, oop_map);
271
272 __ should_not_reach_here();
273 return oop_maps;
274 }
275
276 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
277 int stack_parms) {
278 // Make a frame and preserve the caller's caller-save registers.
279 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, (int)frame::alignment_in_bytes);
280 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
281 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
282
283 int call_offset = 0;
284 switch (stack_parms) {
285 case 3:
286 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
287 case 2:
288 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
289 case 1:
290 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
291 case 0:
292 call_offset = __ call_RT(noreg, noreg, target);
293 break;
294 default: Unimplemented(); break;
295 }
296 OopMapSet* oop_maps = new OopMapSet();
297 oop_maps->add_gc_map(call_offset, oop_map);
298
299 __ should_not_reach_here();
300 return oop_maps;
301 }
302
303
304 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
305 Register arg1, Register arg2, Register arg3) {
306 // Make a frame and preserve the caller's caller-save registers.
307 OopMap* oop_map = save_live_registers(sasm);
308
309 int call_offset;
310 if (arg1 == noreg) {
311 call_offset = __ call_RT(result, noreg, target);
312 } else if (arg2 == noreg) {
313 call_offset = __ call_RT(result, noreg, target, arg1);
314 } else if (arg3 == noreg) {
315 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
316 } else {
317 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
318 }
319 OopMapSet* oop_maps = new OopMapSet();
320 oop_maps->add_gc_map(call_offset, oop_map);
321
322 restore_live_registers(sasm, result, noreg);
323 __ blr();
324 return oop_maps;
325 }
326
327 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
328 int stack_parms, bool do_return = true) {
329 // Make a frame and preserve the caller's caller-save registers.
330 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, (int)frame::alignment_in_bytes);
331 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
332 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
333
334 int call_offset = 0;
335 switch (stack_parms) {
336 case 3:
337 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
338 case 2:
339 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
340 case 1:
341 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
342 case 0:
343 call_offset = __ call_RT(result, noreg, target);
344 break;
345 default: Unimplemented(); break;
346 }
347 OopMapSet* oop_maps = new OopMapSet();
348 oop_maps->add_gc_map(call_offset, oop_map);
349
350 restore_live_registers(sasm, result, noreg);
351 if (do_return) __ blr();
352 return oop_maps;
353 }
354
355
356 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
357 // Make a frame and preserve the caller's caller-save registers.
358 OopMap* oop_map = save_live_registers(sasm);
359
360 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
361 int call_offset = __ call_RT(noreg, noreg, target);
362 OopMapSet* oop_maps = new OopMapSet();
363 oop_maps->add_gc_map(call_offset, oop_map);
364 __ cmpdi(CCR0, R3_RET, 0);
365
366 // Re-execute the patched instruction or, if the nmethod was deoptmized,
367 // return to the deoptimization handler entry that will cause re-execution
368 // of the current bytecode.
369 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
370 assert(deopt_blob != NULL, "deoptimization blob must have been created");
371
372 // Return to the deoptimization handler entry for unpacking and rexecute.
373 // If we simply returned the we'd deopt as if any call we patched had just
374 // returned.
375
376 restore_live_registers(sasm, noreg, noreg);
377 // Return if patching routine returned 0.
378 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
379
380 address stub = deopt_blob->unpack_with_reexecution();
381 //__ load_const_optimized(R0, stub);
382 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
383 __ mtctr(R0);
384 __ bctr();
385
386 return oop_maps;
387 }
388
389 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
390 OopMapSet* oop_maps = NULL;
391
392 // For better readability.
393 const bool must_gc_arguments = true;
394 const bool dont_gc_arguments = false;
395
396 // Stub code & info for the different stubs.
397 switch (id) {
398 case forward_exception_id:
399 {
400 oop_maps = generate_handle_exception(id, sasm);
401 }
402 break;
403
404 case new_instance_id:
405 case fast_new_instance_id:
406 case fast_new_instance_init_check_id:
407 {
408 if (id == new_instance_id) {
409 __ set_info("new_instance", dont_gc_arguments);
410 } else if (id == fast_new_instance_id) {
411 __ set_info("fast new_instance", dont_gc_arguments);
412 } else {
413 assert(id == fast_new_instance_init_check_id, "bad StubID");
414 __ set_info("fast new_instance init check", dont_gc_arguments);
415 }
416 // We don't support eden allocation.
417 // if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
418 // UseTLAB && FastTLABRefill) {
419 // if (id == fast_new_instance_init_check_id) {
420 // // make sure the klass is initialized
421 // __ lbz(R0, in_bytes(InstanceKlass::init_state_offset()), R3_ARG1);
422 // __ cmpwi(CCR0, R0, InstanceKlass::fully_initialized);
423 // __ bne(CCR0, slow_path);
424 // }
425 //#ifdef ASSERT
426 // // assert object can be fast path allocated
427 // {
428 // Label ok, not_ok;
429 // __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R3_ARG1);
430 // // make sure it's an instance (LH > 0)
431 // __ cmpwi(CCR0, R0, 0);
432 // __ ble(CCR0, not_ok);
433 // __ testbitdi(CCR0, R0, R0, Klass::_lh_instance_slow_path_bit);
434 // __ beq(CCR0, ok);
435 //
436 // __ bind(not_ok);
437 // __ stop("assert(can be fast path allocated)");
438 // __ bind(ok);
439 // }
440 //#endif // ASSERT
441 // // We don't support eden allocation.
442 // __ bind(slow_path);
443 // }
444 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
445 }
446 break;
447
448 case counter_overflow_id:
449 // Bci and method are on stack.
450 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
451 break;
452
453 case new_type_array_id:
454 case new_object_array_id:
455 {
456 if (id == new_type_array_id) {
457 __ set_info("new_type_array", dont_gc_arguments);
458 } else {
459 __ set_info("new_object_array", dont_gc_arguments);
460 }
461
462 #ifdef ASSERT
463 // Assert object type is really an array of the proper kind.
464 {
465 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
466 Label ok;
467 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
468 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
469 __ cmpwi(CCR0, R0, tag);
470 __ beq(CCR0, ok);
471 __ stop("assert(is an array klass)");
472 __ should_not_reach_here();
473 __ bind(ok);
474 }
475 #endif // ASSERT
476
477 // We don't support eden allocation.
478
479 if (id == new_type_array_id) {
480 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
481 } else {
482 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
483 }
484 }
485 break;
486
487 case new_multi_array_id:
488 {
489 // R4: klass
490 // R5: rank
491 // R6: address of 1st dimension
492 __ set_info("new_multi_array", dont_gc_arguments);
493 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
494 }
495 break;
496
497 case register_finalizer_id:
498 {
499 __ set_info("register_finalizer", dont_gc_arguments);
500 // This code is called via rt_call. Hence, caller-save registers have been saved.
501 Register t = R11_scratch1;
502
503 // Load the klass and check the has finalizer flag.
504 __ load_klass(t, R3_ARG1);
505 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
506 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
507 // Return if has_finalizer bit == 0 (CR0.eq).
508 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
509
510 __ mflr(R0);
511 __ std(R0, _abi(lr), R1_SP);
512 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
513 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
514 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
515 int call_offset = __ call_RT(noreg, noreg,
516 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
517 oop_maps = new OopMapSet();
518 oop_maps->add_gc_map(call_offset, oop_map);
519
520 __ pop_frame();
521 __ ld(R0, _abi(lr), R1_SP);
522 __ mtlr(R0);
523 __ blr();
524 }
525 break;
526
527 case throw_range_check_failed_id:
528 {
529 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
530 __ std(R0, -8, R1_SP); // Pass index on stack.
531 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 1);
532 }
533 break;
534
535 case throw_index_exception_id:
536 {
537 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
538 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
539 }
540 break;
541
542 case throw_div0_exception_id:
543 {
544 __ set_info("throw_div0_exception", dont_gc_arguments);
545 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
546 }
547 break;
548
549 case throw_null_pointer_exception_id:
550 {
551 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
552 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
553 }
554 break;
555
556 case handle_exception_nofpu_id:
557 case handle_exception_id:
558 {
559 __ set_info("handle_exception", dont_gc_arguments);
560 oop_maps = generate_handle_exception(id, sasm);
561 }
562 break;
563
564 case handle_exception_from_callee_id:
565 {
566 __ set_info("handle_exception_from_callee", dont_gc_arguments);
567 oop_maps = generate_handle_exception(id, sasm);
568 }
569 break;
570
571 case unwind_exception_id:
572 {
573 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
574 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
575 Rexception_save = R31, Rcaller_sp = R30;
576 __ set_info("unwind_exception", dont_gc_arguments);
577
578 __ ld(Rcaller_sp, 0, R1_SP);
579 __ push_frame_reg_args(0, R0); // dummy frame for C call
580 __ mr(Rexception_save, Rexception); // save over C call
581 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
582 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
583 __ verify_not_null_oop(Rexception_save);
584 __ mtctr(R3_RET);
585 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
586 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
587 __ mr(Rexception, Rexception_save); // restore
588 __ mtlr(Rexception_pc);
589 __ bctr();
590 }
591 break;
592
593 case throw_array_store_exception_id:
594 {
595 __ set_info("throw_array_store_exception", dont_gc_arguments);
596 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
597 }
598 break;
599
600 case throw_class_cast_exception_id:
601 {
602 __ set_info("throw_class_cast_exception", dont_gc_arguments);
603 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
604 }
605 break;
606
607 case throw_incompatible_class_change_error_id:
608 {
609 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
610 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
611 }
612 break;
613
614 case slow_subtype_check_id:
615 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
616 const Register sub_klass = R5,
617 super_klass = R4,
618 temp1_reg = R6,
619 temp2_reg = R0;
620 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
621 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
622 __ blr();
623 }
624 break;
625
626 case monitorenter_nofpu_id:
627 case monitorenter_id:
628 {
629 __ set_info("monitorenter", dont_gc_arguments);
630
631 int save_fpu_registers = (id == monitorenter_id);
632 // Make a frame and preserve the caller's caller-save registers.
633 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
634
635 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
636
637 oop_maps = new OopMapSet();
638 oop_maps->add_gc_map(call_offset, oop_map);
639
640 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
641 __ blr();
642 }
643 break;
644
645 case monitorexit_nofpu_id:
646 case monitorexit_id:
647 {
648 // note: Really a leaf routine but must setup last java sp
649 // => use call_RT for now (speed can be improved by
650 // doing last java sp setup manually).
651 __ set_info("monitorexit", dont_gc_arguments);
652
653 int save_fpu_registers = (id == monitorexit_id);
654 // Make a frame and preserve the caller's caller-save registers.
655 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
656
657 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
658
659 oop_maps = new OopMapSet();
660 oop_maps->add_gc_map(call_offset, oop_map);
661
662 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
663 __ blr();
664 }
665 break;
666
667 case deoptimize_id:
668 {
669 __ set_info("deoptimize", dont_gc_arguments);
670 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
671 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
672
673 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
674 assert(deopt_blob != NULL, "deoptimization blob must have been created");
675 address stub = deopt_blob->unpack_with_reexecution();
676 //__ load_const_optimized(R0, stub);
677 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
678 __ mtctr(R0);
679 __ bctr();
680 }
681 break;
682
683 case access_field_patching_id:
684 {
685 __ set_info("access_field_patching", dont_gc_arguments);
686 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
687 }
688 break;
689
690 case load_klass_patching_id:
691 {
692 __ set_info("load_klass_patching", dont_gc_arguments);
693 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
694 }
695 break;
696
697 case load_mirror_patching_id:
698 {
699 __ set_info("load_mirror_patching", dont_gc_arguments);
700 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
701 }
702 break;
703
704 case load_appendix_patching_id:
705 {
706 __ set_info("load_appendix_patching", dont_gc_arguments);
707 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
708 }
709 break;
710
711 case dtrace_object_alloc_id:
712 { // O0: object
713 __ unimplemented("stub dtrace_object_alloc_id");
714 __ set_info("dtrace_object_alloc", dont_gc_arguments);
715 // // We can't gc here so skip the oopmap but make sure that all
716 // // the live registers get saved.
717 // save_live_registers(sasm);
718 //
719 // __ save_thread(L7_thread_cache);
720 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
721 // relocInfo::runtime_call_type);
722 // __ delayed()->mov(I0, O0);
723 // __ restore_thread(L7_thread_cache);
724 //
725 // restore_live_registers(sasm);
726 // __ ret();
727 // __ delayed()->restore();
728 }
729 break;
730
731 #if INCLUDE_ALL_GCS
732 case g1_pre_barrier_slow_id:
733 {
734 BarrierSet* bs = Universe::heap()->barrier_set();
735 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
736 goto unimplemented_entry;
737 }
738
739 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
740
741 // Using stack slots: pre_val (pre-pushed), spill tmp, spill tmp2.
742 const int stack_slots = 3;
743 Register pre_val = R0; // previous value of memory
744 Register tmp = R14;
745 Register tmp2 = R15;
746
747 Label refill, restart, marking_not_active;
748 int satb_q_active_byte_offset =
749 in_bytes(JavaThread::satb_mark_queue_offset() +
750 SATBMarkQueue::byte_offset_of_active());
751 int satb_q_index_byte_offset =
752 in_bytes(JavaThread::satb_mark_queue_offset() +
753 SATBMarkQueue::byte_offset_of_index());
754 int satb_q_buf_byte_offset =
755 in_bytes(JavaThread::satb_mark_queue_offset() +
756 SATBMarkQueue::byte_offset_of_buf());
757
758 // Spill
759 __ std(tmp, -16, R1_SP);
760 __ std(tmp2, -24, R1_SP);
761
762 // Is marking still active?
763 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
764 __ lwz(tmp, satb_q_active_byte_offset, R16_thread);
765 } else {
766 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
767 __ lbz(tmp, satb_q_active_byte_offset, R16_thread);
768 }
769 __ cmpdi(CCR0, tmp, 0);
770 __ beq(CCR0, marking_not_active);
771
772 __ bind(restart);
773 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
774 // size_t so ld_ptr is appropriate.
775 __ ld(tmp, satb_q_index_byte_offset, R16_thread);
776
777 // index == 0?
778 __ cmpdi(CCR0, tmp, 0);
779 __ beq(CCR0, refill);
780
781 __ ld(tmp2, satb_q_buf_byte_offset, R16_thread);
782 __ ld(pre_val, -8, R1_SP); // Load from stack.
783 __ addi(tmp, tmp, -oopSize);
784
785 __ std(tmp, satb_q_index_byte_offset, R16_thread);
786 __ stdx(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
787
788 __ bind(marking_not_active);
789 // Restore temp registers and return-from-leaf.
790 __ ld(tmp2, -24, R1_SP);
791 __ ld(tmp, -16, R1_SP);
792 __ blr();
793
794 __ bind(refill);
795 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
796 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
797 __ mflr(R0);
798 __ std(R0, _abi(lr), R1_SP);
799 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
800 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), R16_thread);
801 __ pop_frame();
802 __ ld(R0, _abi(lr), R1_SP);
803 __ mtlr(R0);
804 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
805 __ b(restart);
806 }
807 break;
808
809 case g1_post_barrier_slow_id:
810 {
811 BarrierSet* bs = Universe::heap()->barrier_set();
812 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
813 goto unimplemented_entry;
814 }
815
816 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
817
818 // Using stack slots: spill addr, spill tmp2
819 const int stack_slots = 2;
820 Register tmp = R0;
821 Register addr = R14;
822 Register tmp2 = R15;
823 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base;
824
825 Label restart, refill, ret;
826
827 // Spill
828 __ std(addr, -8, R1_SP);
829 __ std(tmp2, -16, R1_SP);
830
831 __ srdi(addr, R0, CardTableModRefBS::card_shift); // Addr is passed in R0.
832 __ load_const_optimized(/*cardtable*/ tmp2, byte_map_base, tmp);
833 __ add(addr, tmp2, addr);
834 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
835
836 // Return if young card.
837 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::g1_young_card_val());
838 __ beq(CCR0, ret);
839
840 // Return if sequential consistent value is already dirty.
841 __ membar(Assembler::StoreLoad);
842 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
843
844 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::dirty_card_val());
845 __ beq(CCR0, ret);
846
847 // Not dirty.
848
849 // First, dirty it.
850 __ li(tmp, G1SATBCardTableModRefBS::dirty_card_val());
851 __ stb(tmp, 0, addr);
852
853 int dirty_card_q_index_byte_offset =
854 in_bytes(JavaThread::dirty_card_queue_offset() +
855 DirtyCardQueue::byte_offset_of_index());
856 int dirty_card_q_buf_byte_offset =
857 in_bytes(JavaThread::dirty_card_queue_offset() +
858 DirtyCardQueue::byte_offset_of_buf());
859
860 __ bind(restart);
861
862 // Get the index into the update buffer. DirtyCardQueue::_index is
863 // a size_t so ld_ptr is appropriate here.
864 __ ld(tmp2, dirty_card_q_index_byte_offset, R16_thread);
865
866 // index == 0?
867 __ cmpdi(CCR0, tmp2, 0);
868 __ beq(CCR0, refill);
869
870 __ ld(tmp, dirty_card_q_buf_byte_offset, R16_thread);
871 __ addi(tmp2, tmp2, -oopSize);
872
873 __ std(tmp2, dirty_card_q_index_byte_offset, R16_thread);
874 __ add(tmp2, tmp, tmp2);
875 __ std(addr, 0, tmp2); // [_buf + index] := <address_of_card>
876
877 // Restore temp registers and return-from-leaf.
878 __ bind(ret);
879 __ ld(tmp2, -16, R1_SP);
880 __ ld(addr, -8, R1_SP);
881 __ blr();
882
883 __ bind(refill);
884 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
885 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
886 __ mflr(R0);
887 __ std(R0, _abi(lr), R1_SP);
888 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
889 __ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), R16_thread);
890 __ pop_frame();
891 __ ld(R0, _abi(lr), R1_SP);
892 __ mtlr(R0);
893 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
894 __ b(restart);
895 }
896 break;
897 #endif // INCLUDE_ALL_GCS
898
899 case predicate_failed_trap_id:
900 {
901 __ set_info("predicate_failed_trap", dont_gc_arguments);
902 OopMap* oop_map = save_live_registers(sasm);
903
904 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
905
906 oop_maps = new OopMapSet();
907 oop_maps->add_gc_map(call_offset, oop_map);
908
909 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
910 assert(deopt_blob != NULL, "deoptimization blob must have been created");
911 restore_live_registers(sasm, noreg, noreg);
912
913 address stub = deopt_blob->unpack_with_reexecution();
914 //__ load_const_optimized(R0, stub);
915 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
916 __ mtctr(R0);
917 __ bctr();
918 }
919 break;
920
921 default:
922 unimplemented_entry:
923 {
924 __ set_info("unimplemented entry", dont_gc_arguments);
925 __ mflr(R0);
926 __ std(R0, _abi(lr), R1_SP);
927 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
928 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
929 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
930
931 __ load_const_optimized(R4_ARG2, (int)id);
932 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
933
934 oop_maps = new OopMapSet();
935 oop_maps->add_gc_map(call_offset, oop_map);
936 __ should_not_reach_here();
937 }
938 break;
939 }
940 return oop_maps;
941 }
942
943
944 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
945 __ block_comment("generate_handle_exception");
946
947 // Save registers, if required.
948 OopMapSet* oop_maps = new OopMapSet();
949 OopMap* oop_map = NULL;
950 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
951 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
952
953 switch (id) {
954 case forward_exception_id:
955 // We're handling an exception in the context of a compiled frame.
956 // The registers have been saved in the standard places. Perform
957 // an exception lookup in the caller and dispatch to the handler
958 // if found. Otherwise unwind and dispatch to the callers
959 // exception handler.
960 oop_map = generate_oop_map(sasm, true);
961 // Transfer the pending exception to the exception_oop.
962 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
963 // but we support additional slots in the frame for parameter passing.
964 __ ld(Rexception_pc, 0, R1_SP);
965 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
966 __ li(R0, 0);
967 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
968 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
969 break;
970 case handle_exception_nofpu_id:
971 case handle_exception_id:
972 // At this point all registers MAY be live.
973 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
974 break;
975 case handle_exception_from_callee_id:
976 // At this point all registers except exception oop and exception pc are dead.
977 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
978 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
979 __ std(Rexception_pc, _abi(lr), R1_SP);
980 __ push_frame(frame_size_in_bytes, R0);
981 break;
982 default: ShouldNotReachHere();
983 }
984
985 __ verify_not_null_oop(Rexception);
986
987 #ifdef ASSERT
988 // Check that fields in JavaThread for exception oop and issuing pc are
989 // empty before writing to them.
990 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
991 __ cmpdi(CCR0, R0, 0);
992 __ asm_assert_eq("exception oop already set", 0x963);
993 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
994 __ cmpdi(CCR0, R0, 0);
995 __ asm_assert_eq("exception pc already set", 0x962);
996 #endif
997
998 // Save the exception and issuing pc in the thread.
999 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
1000 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
1001
1002 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1003 oop_maps->add_gc_map(call_offset, oop_map);
1004
1005 __ mtctr(R3_RET);
1006
1007 // Note: if nmethod has been deoptimized then regardless of
1008 // whether it had a handler or not we will deoptimize
1009 // by entering the deopt blob with a pending exception.
1010
1011 // Restore the registers that were saved at the beginning, remove
1012 // the frame and jump to the exception handler.
1013 switch (id) {
1014 case forward_exception_id:
1015 case handle_exception_nofpu_id:
1016 case handle_exception_id:
1017 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
1018 __ bctr();
1019 break;
1020 case handle_exception_from_callee_id: {
1021 __ pop_frame();
1022 __ ld(Rexception_pc, _abi(lr), R1_SP);
1023 __ mtlr(Rexception_pc);
1024 __ bctr();
1025 break;
1026 }
1027 default: ShouldNotReachHere();
1028 }
1029
1030 return oop_maps;
1031 }
1032
1033 const char *Runtime1::pd_name_for_address(address entry) {
1034 return "<unknown function>";
1035 }
1036
1037 #undef __