1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2018 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 "ci/ciUtilities.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "nativeInst_ppc.hpp"
35 #include "oops/compiledICHolder.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "register_ppc.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/signature.hpp"
41 #include "runtime/vframeArray.hpp"
42 #include "utilities/align.hpp"
43 #include "utilities/macros.hpp"
44 #include "vmreg_ppc.inline.hpp"
45 #if INCLUDE_ALL_GCS
46 #include "gc/g1/g1BarrierSet.hpp"
47 #include "gc/g1/g1CardTable.hpp"
48 #include "gc/g1/g1ThreadLocalData.hpp"
49 #endif
50
51 // Implementation of StubAssembler
52
53 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
54 address entry_point, int number_of_arguments) {
55 set_num_rt_args(0); // Nothing on stack
56 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
57 oop_result1 != metadata_result, "registers must be different");
58
59 // Currently no stack banging. We assume that there are enough
60 // StackShadowPages (which have been banged in generate_stack_overflow_check)
61 // for the stub frame and the runtime frames.
62
63 set_last_Java_frame(R1_SP, noreg);
64
65 // ARG1 must hold thread address.
66 mr(R3_ARG1, R16_thread);
67
68 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
69
70 reset_last_Java_frame();
71
72 // Check for pending exceptions.
73 {
74 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
75 cmpdi(CCR0, R0, 0);
76
77 // This used to conditionally jump to forward_exception however it is
78 // possible if we relocate that the branch will not reach. So we must jump
79 // around so we can always reach.
80
81 Label ok;
82 beq(CCR0, ok);
83
84 // Make sure that the vm_results are cleared.
85 if (oop_result1->is_valid() || metadata_result->is_valid()) {
86 li(R0, 0);
87 if (oop_result1->is_valid()) {
88 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
89 }
90 if (metadata_result->is_valid()) {
91 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
92 }
93 }
94
95 if (frame_size() == no_frame_size) {
96 ShouldNotReachHere(); // We always have a frame size.
97 //pop_frame(); // pop the stub frame
98 //ld(R0, _abi(lr), R1_SP);
99 //mtlr(R0);
100 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
101 //mtctr(R0);
102 //bctr();
103 } else if (_stub_id == Runtime1::forward_exception_id) {
104 should_not_reach_here();
105 } else {
106 // keep stub frame for next call_RT
107 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
108 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
109 mtctr(R0);
110 bctr();
111 }
112
113 bind(ok);
114 }
115
116 // Get oop results if there are any and reset the values in the thread.
117 if (oop_result1->is_valid()) {
118 get_vm_result(oop_result1);
119 }
120 if (metadata_result->is_valid()) {
121 get_vm_result_2(metadata_result);
122 }
123
124 return (int)(return_pc - code_section()->start());
125 }
126
127
128 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
129 mr_if_needed(R4_ARG2, arg1);
130 return call_RT(oop_result1, metadata_result, entry, 1);
131 }
132
133
134 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
135 mr_if_needed(R4_ARG2, arg1);
136 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
137 return call_RT(oop_result1, metadata_result, entry, 2);
138 }
139
140
141 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
142 mr_if_needed(R4_ARG2, arg1);
143 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
144 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
145 return call_RT(oop_result1, metadata_result, entry, 3);
146 }
147
148
149 // Implementation of Runtime1
150
151 #define __ sasm->
152
153 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
154 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
155 static int frame_size_in_bytes = -1;
156
157 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
158 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
159 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
160 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
161 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
162
163 int i;
164 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
165 Register r = as_Register(i);
166 if (FrameMap::reg_needs_save(r)) {
167 int sp_offset = cpu_reg_save_offsets[i];
168 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
169 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
170 }
171 }
172
173 if (save_fpu_registers) {
174 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
175 FloatRegister r = as_FloatRegister(i);
176 int sp_offset = fpu_reg_save_offsets[i];
177 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
178 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
179 }
180 }
181
182 return oop_map;
183 }
184
185 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
186 Register ret_pc = noreg, int stack_preserve = 0) {
187 if (ret_pc == noreg) {
188 ret_pc = R0;
189 __ mflr(ret_pc);
190 }
191 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method.
192 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
193
194 // Record volatile registers as callee-save values in an OopMap so
195 // their save locations will be propagated to the caller frame's
196 // RegisterMap during StackFrameStream construction (needed for
197 // deoptimization; see compiledVFrame::create_stack_value).
198 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
199
200 int i;
201 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
202 Register r = as_Register(i);
203 if (FrameMap::reg_needs_save(r)) {
204 int sp_offset = cpu_reg_save_offsets[i];
205 __ std(r, sp_offset + STACK_BIAS, R1_SP);
206 }
207 }
208
209 if (save_fpu_registers) {
210 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
211 FloatRegister r = as_FloatRegister(i);
212 int sp_offset = fpu_reg_save_offsets[i];
213 __ stfd(r, sp_offset + STACK_BIAS, R1_SP);
214 }
215 }
216
217 return generate_oop_map(sasm, save_fpu_registers);
218 }
219
220 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
221 bool restore_fpu_registers = true) {
222 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
223 Register r = as_Register(i);
224 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
225 int sp_offset = cpu_reg_save_offsets[i];
226 __ ld(r, sp_offset + STACK_BIAS, R1_SP);
227 }
228 }
229
230 if (restore_fpu_registers) {
231 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
232 FloatRegister r = as_FloatRegister(i);
233 int sp_offset = fpu_reg_save_offsets[i];
234 __ lfd(r, sp_offset + STACK_BIAS, R1_SP);
235 }
236 }
237
238 __ pop_frame();
239 __ ld(R0, _abi(lr), R1_SP);
240 __ mtlr(R0);
241 }
242
243
244 void Runtime1::initialize_pd() {
245 int i;
246 int sp_offset = frame::abi_reg_args_size;
247
248 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
249 Register r = as_Register(i);
250 if (FrameMap::reg_needs_save(r)) {
251 cpu_reg_save_offsets[i] = sp_offset;
252 sp_offset += BytesPerWord;
253 }
254 }
255
256 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
257 fpu_reg_save_offsets[i] = sp_offset;
258 sp_offset += BytesPerWord;
259 }
260 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes);
261 }
262
263
264 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
265 // Make a frame and preserve the caller's caller-save registers.
266 OopMap* oop_map = save_live_registers(sasm);
267
268 int call_offset;
269 if (!has_argument) {
270 call_offset = __ call_RT(noreg, noreg, target);
271 } else {
272 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
273 }
274 OopMapSet* oop_maps = new OopMapSet();
275 oop_maps->add_gc_map(call_offset, oop_map);
276
277 __ should_not_reach_here();
278 return oop_maps;
279 }
280
281 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
282 int stack_parms) {
283 // Make a frame and preserve the caller's caller-save registers.
284 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
285 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
286 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
287
288 int call_offset = 0;
289 switch (stack_parms) {
290 case 3:
291 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
292 case 2:
293 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
294 case 1:
295 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
296 case 0:
297 call_offset = __ call_RT(noreg, noreg, target);
298 break;
299 default: Unimplemented(); break;
300 }
301 OopMapSet* oop_maps = new OopMapSet();
302 oop_maps->add_gc_map(call_offset, oop_map);
303
304 __ should_not_reach_here();
305 return oop_maps;
306 }
307
308
309 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
310 Register arg1, Register arg2, Register arg3) {
311 // Make a frame and preserve the caller's caller-save registers.
312 OopMap* oop_map = save_live_registers(sasm);
313
314 int call_offset;
315 if (arg1 == noreg) {
316 call_offset = __ call_RT(result, noreg, target);
317 } else if (arg2 == noreg) {
318 call_offset = __ call_RT(result, noreg, target, arg1);
319 } else if (arg3 == noreg) {
320 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
321 } else {
322 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
323 }
324 OopMapSet* oop_maps = new OopMapSet();
325 oop_maps->add_gc_map(call_offset, oop_map);
326
327 restore_live_registers(sasm, result, noreg);
328 __ blr();
329 return oop_maps;
330 }
331
332 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
333 int stack_parms, bool do_return = true) {
334 // Make a frame and preserve the caller's caller-save registers.
335 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
336 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
337 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
338
339 int call_offset = 0;
340 switch (stack_parms) {
341 case 3:
342 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
343 case 2:
344 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
345 case 1:
346 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
347 case 0:
348 call_offset = __ call_RT(result, noreg, target);
349 break;
350 default: Unimplemented(); break;
351 }
352 OopMapSet* oop_maps = new OopMapSet();
353 oop_maps->add_gc_map(call_offset, oop_map);
354
355 restore_live_registers(sasm, result, noreg);
356 if (do_return) __ blr();
357 return oop_maps;
358 }
359
360
361 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
362 // Make a frame and preserve the caller's caller-save registers.
363 OopMap* oop_map = save_live_registers(sasm);
364
365 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
366 int call_offset = __ call_RT(noreg, noreg, target);
367 OopMapSet* oop_maps = new OopMapSet();
368 oop_maps->add_gc_map(call_offset, oop_map);
369 __ cmpdi(CCR0, R3_RET, 0);
370
371 // Re-execute the patched instruction or, if the nmethod was deoptmized,
372 // return to the deoptimization handler entry that will cause re-execution
373 // of the current bytecode.
374 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
375 assert(deopt_blob != NULL, "deoptimization blob must have been created");
376
377 // Return to the deoptimization handler entry for unpacking and rexecute.
378 // If we simply returned the we'd deopt as if any call we patched had just
379 // returned.
380
381 restore_live_registers(sasm, noreg, noreg);
382 // Return if patching routine returned 0.
383 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
384
385 address stub = deopt_blob->unpack_with_reexecution();
386 //__ load_const_optimized(R0, stub);
387 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
388 __ mtctr(R0);
389 __ bctr();
390
391 return oop_maps;
392 }
393
394 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
395 OopMapSet* oop_maps = NULL;
396
397 // For better readability.
398 const bool must_gc_arguments = true;
399 const bool dont_gc_arguments = false;
400
401 // Stub code & info for the different stubs.
402 switch (id) {
403 case forward_exception_id:
404 {
405 oop_maps = generate_handle_exception(id, sasm);
406 }
407 break;
408
409 case new_instance_id:
410 case fast_new_instance_id:
411 case fast_new_instance_init_check_id:
412 {
413 if (id == new_instance_id) {
414 __ set_info("new_instance", dont_gc_arguments);
415 } else if (id == fast_new_instance_id) {
416 __ set_info("fast new_instance", dont_gc_arguments);
417 } else {
418 assert(id == fast_new_instance_init_check_id, "bad StubID");
419 __ set_info("fast new_instance init check", dont_gc_arguments);
420 }
421
422 // We don't support eden allocation.
423
424 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
425 }
426 break;
427
428 case counter_overflow_id:
429 // Bci and method are on stack.
430 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
431 break;
432
433 case new_type_array_id:
434 case new_object_array_id:
435 {
436 if (id == new_type_array_id) {
437 __ set_info("new_type_array", dont_gc_arguments);
438 } else {
439 __ set_info("new_object_array", dont_gc_arguments);
440 }
441
442 #ifdef ASSERT
443 // Assert object type is really an array of the proper kind.
444 {
445 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
446 Label ok;
447 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
448 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
449 __ cmpwi(CCR0, R0, tag);
450 __ beq(CCR0, ok);
451 __ stop("assert(is an array klass)");
452 __ should_not_reach_here();
453 __ bind(ok);
454 }
455 #endif // ASSERT
456
457 // We don't support eden allocation.
458
459 if (id == new_type_array_id) {
460 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
461 } else {
462 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
463 }
464 }
465 break;
466
467 case new_multi_array_id:
468 {
469 // R4: klass
470 // R5: rank
471 // R6: address of 1st dimension
472 __ set_info("new_multi_array", dont_gc_arguments);
473 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
474 }
475 break;
476
477 case register_finalizer_id:
478 {
479 __ set_info("register_finalizer", dont_gc_arguments);
480 // This code is called via rt_call. Hence, caller-save registers have been saved.
481 Register t = R11_scratch1;
482
483 // Load the klass and check the has finalizer flag.
484 __ load_klass(t, R3_ARG1);
485 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
486 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
487 // Return if has_finalizer bit == 0 (CR0.eq).
488 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
489
490 __ mflr(R0);
491 __ std(R0, _abi(lr), R1_SP);
492 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
493 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
494 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
495 int call_offset = __ call_RT(noreg, noreg,
496 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
497 oop_maps = new OopMapSet();
498 oop_maps->add_gc_map(call_offset, oop_map);
499
500 __ pop_frame();
501 __ ld(R0, _abi(lr), R1_SP);
502 __ mtlr(R0);
503 __ blr();
504 }
505 break;
506
507 case throw_range_check_failed_id:
508 {
509 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
510 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
511 }
512 break;
513
514 case throw_index_exception_id:
515 {
516 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
517 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
518 }
519 break;
520
521 case throw_div0_exception_id:
522 {
523 __ set_info("throw_div0_exception", dont_gc_arguments);
524 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
525 }
526 break;
527
528 case throw_null_pointer_exception_id:
529 {
530 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
531 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
532 }
533 break;
534
535 case handle_exception_nofpu_id:
536 case handle_exception_id:
537 {
538 __ set_info("handle_exception", dont_gc_arguments);
539 oop_maps = generate_handle_exception(id, sasm);
540 }
541 break;
542
543 case handle_exception_from_callee_id:
544 {
545 __ set_info("handle_exception_from_callee", dont_gc_arguments);
546 oop_maps = generate_handle_exception(id, sasm);
547 }
548 break;
549
550 case unwind_exception_id:
551 {
552 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
553 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
554 Rexception_save = R31, Rcaller_sp = R30;
555 __ set_info("unwind_exception", dont_gc_arguments);
556
557 __ ld(Rcaller_sp, 0, R1_SP);
558 __ push_frame_reg_args(0, R0); // dummy frame for C call
559 __ mr(Rexception_save, Rexception); // save over C call
560 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
561 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
562 __ verify_not_null_oop(Rexception_save);
563 __ mtctr(R3_RET);
564 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
565 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
566 __ mr(Rexception, Rexception_save); // restore
567 __ mtlr(Rexception_pc);
568 __ bctr();
569 }
570 break;
571
572 case throw_array_store_exception_id:
573 {
574 __ set_info("throw_array_store_exception", dont_gc_arguments);
575 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
576 }
577 break;
578
579 case throw_class_cast_exception_id:
580 {
581 __ set_info("throw_class_cast_exception", dont_gc_arguments);
582 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
583 }
584 break;
585
586 case throw_incompatible_class_change_error_id:
587 {
588 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
589 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
590 }
591 break;
592
593 case slow_subtype_check_id:
594 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
595 const Register sub_klass = R5,
596 super_klass = R4,
597 temp1_reg = R6,
598 temp2_reg = R0;
599 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
600 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
601 __ blr();
602 }
603 break;
604
605 case monitorenter_nofpu_id:
606 case monitorenter_id:
607 {
608 __ set_info("monitorenter", dont_gc_arguments);
609
610 int save_fpu_registers = (id == monitorenter_id);
611 // Make a frame and preserve the caller's caller-save registers.
612 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
613
614 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
615
616 oop_maps = new OopMapSet();
617 oop_maps->add_gc_map(call_offset, oop_map);
618
619 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
620 __ blr();
621 }
622 break;
623
624 case monitorexit_nofpu_id:
625 case monitorexit_id:
626 {
627 // note: Really a leaf routine but must setup last java sp
628 // => use call_RT for now (speed can be improved by
629 // doing last java sp setup manually).
630 __ set_info("monitorexit", dont_gc_arguments);
631
632 int save_fpu_registers = (id == monitorexit_id);
633 // Make a frame and preserve the caller's caller-save registers.
634 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
635
636 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
637
638 oop_maps = new OopMapSet();
639 oop_maps->add_gc_map(call_offset, oop_map);
640
641 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
642 __ blr();
643 }
644 break;
645
646 case deoptimize_id:
647 {
648 __ set_info("deoptimize", dont_gc_arguments);
649 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
650 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
651
652 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
653 assert(deopt_blob != NULL, "deoptimization blob must have been created");
654 address stub = deopt_blob->unpack_with_reexecution();
655 //__ load_const_optimized(R0, stub);
656 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
657 __ mtctr(R0);
658 __ bctr();
659 }
660 break;
661
662 case access_field_patching_id:
663 {
664 __ set_info("access_field_patching", dont_gc_arguments);
665 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
666 }
667 break;
668
669 case load_klass_patching_id:
670 {
671 __ set_info("load_klass_patching", dont_gc_arguments);
672 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
673 }
674 break;
675
676 case load_mirror_patching_id:
677 {
678 __ set_info("load_mirror_patching", dont_gc_arguments);
679 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
680 }
681 break;
682
683 case load_appendix_patching_id:
684 {
685 __ set_info("load_appendix_patching", dont_gc_arguments);
686 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
687 }
688 break;
689
690 case dtrace_object_alloc_id:
691 { // O0: object
692 __ unimplemented("stub dtrace_object_alloc_id");
693 __ set_info("dtrace_object_alloc", dont_gc_arguments);
694 // // We can't gc here so skip the oopmap but make sure that all
695 // // the live registers get saved.
696 // save_live_registers(sasm);
697 //
698 // __ save_thread(L7_thread_cache);
699 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
700 // relocInfo::runtime_call_type);
701 // __ delayed()->mov(I0, O0);
702 // __ restore_thread(L7_thread_cache);
703 //
704 // restore_live_registers(sasm);
705 // __ ret();
706 // __ delayed()->restore();
707 }
708 break;
709
710 #if INCLUDE_ALL_GCS
711 case g1_pre_barrier_slow_id:
712 {
713 BarrierSet* bs = BarrierSet::barrier_set();
714 if (bs->kind() != BarrierSet::G1BarrierSet) {
715 goto unimplemented_entry;
716 }
717
718 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
719
720 // Using stack slots: pre_val (pre-pushed), spill tmp, spill tmp2.
721 const int stack_slots = 3;
722 Register pre_val = R0; // previous value of memory
723 Register tmp = R14;
724 Register tmp2 = R15;
725
726 Label refill, restart, marking_not_active;
727 int satb_q_active_byte_offset = in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset());
728 int satb_q_index_byte_offset = in_bytes(G1ThreadLocalData::satb_mark_queue_index_offset());
729 int satb_q_buf_byte_offset = in_bytes(G1ThreadLocalData::satb_mark_queue_buffer_offset());
730
731 // Spill
732 __ std(tmp, -16, R1_SP);
733 __ std(tmp2, -24, R1_SP);
734
735 // Is marking still active?
736 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
737 __ lwz(tmp, satb_q_active_byte_offset, R16_thread);
738 } else {
739 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
740 __ lbz(tmp, satb_q_active_byte_offset, R16_thread);
741 }
742 __ cmpdi(CCR0, tmp, 0);
743 __ beq(CCR0, marking_not_active);
744
745 __ bind(restart);
746 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
747 // size_t so ld_ptr is appropriate.
748 __ ld(tmp, satb_q_index_byte_offset, R16_thread);
749
750 // index == 0?
751 __ cmpdi(CCR0, tmp, 0);
752 __ beq(CCR0, refill);
753
754 __ ld(tmp2, satb_q_buf_byte_offset, R16_thread);
755 __ ld(pre_val, -8, R1_SP); // Load from stack.
756 __ addi(tmp, tmp, -oopSize);
757
758 __ std(tmp, satb_q_index_byte_offset, R16_thread);
759 __ stdx(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
760
761 __ bind(marking_not_active);
762 // Restore temp registers and return-from-leaf.
763 __ ld(tmp2, -24, R1_SP);
764 __ ld(tmp, -16, R1_SP);
765 __ blr();
766
767 __ bind(refill);
768 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
769 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
770 __ mflr(R0);
771 __ std(R0, _abi(lr), R1_SP);
772 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
773 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), R16_thread);
774 __ pop_frame();
775 __ ld(R0, _abi(lr), R1_SP);
776 __ mtlr(R0);
777 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
778 __ b(restart);
779 }
780 break;
781
782 case g1_post_barrier_slow_id:
783 {
784 BarrierSet* bs = BarrierSet::barrier_set();
785 if (bs->kind() != BarrierSet::G1BarrierSet) {
786 goto unimplemented_entry;
787 }
788
789 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
790
791 // Using stack slots: spill addr, spill tmp2
792 const int stack_slots = 2;
793 Register tmp = R0;
794 Register addr = R14;
795 Register tmp2 = R15;
796 jbyte* byte_map_base = ci_card_table_address();
797
798 Label restart, refill, ret;
799
800 // Spill
801 __ std(addr, -8, R1_SP);
802 __ std(tmp2, -16, R1_SP);
803
804 __ srdi(addr, R0, CardTable::card_shift); // Addr is passed in R0.
805 __ load_const_optimized(/*cardtable*/ tmp2, byte_map_base, tmp);
806 __ add(addr, tmp2, addr);
807 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
808
809 // Return if young card.
810 __ cmpwi(CCR0, tmp, G1CardTable::g1_young_card_val());
811 __ beq(CCR0, ret);
812
813 // Return if sequential consistent value is already dirty.
814 __ membar(Assembler::StoreLoad);
815 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
816
817 __ cmpwi(CCR0, tmp, G1CardTable::dirty_card_val());
818 __ beq(CCR0, ret);
819
820 // Not dirty.
821
822 // First, dirty it.
823 __ li(tmp, G1CardTable::dirty_card_val());
824 __ stb(tmp, 0, addr);
825
826 int dirty_card_q_index_byte_offset = in_bytes(G1ThreadLocalData::dirty_card_queue_index_offset());
827 int dirty_card_q_buf_byte_offset = in_bytes(G1ThreadLocalData::dirty_card_queue_buffer_offset());
828
829 __ bind(restart);
830
831 // Get the index into the update buffer. DirtyCardQueue::_index is
832 // a size_t so ld_ptr is appropriate here.
833 __ ld(tmp2, dirty_card_q_index_byte_offset, R16_thread);
834
835 // index == 0?
836 __ cmpdi(CCR0, tmp2, 0);
837 __ beq(CCR0, refill);
838
839 __ ld(tmp, dirty_card_q_buf_byte_offset, R16_thread);
840 __ addi(tmp2, tmp2, -oopSize);
841
842 __ std(tmp2, dirty_card_q_index_byte_offset, R16_thread);
843 __ add(tmp2, tmp, tmp2);
844 __ std(addr, 0, tmp2); // [_buf + index] := <address_of_card>
845
846 // Restore temp registers and return-from-leaf.
847 __ bind(ret);
848 __ ld(tmp2, -16, R1_SP);
849 __ ld(addr, -8, R1_SP);
850 __ blr();
851
852 __ bind(refill);
853 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
854 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
855 __ mflr(R0);
856 __ std(R0, _abi(lr), R1_SP);
857 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
858 __ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), R16_thread);
859 __ pop_frame();
860 __ ld(R0, _abi(lr), R1_SP);
861 __ mtlr(R0);
862 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
863 __ b(restart);
864 }
865 break;
866 #endif // INCLUDE_ALL_GCS
867
868 case predicate_failed_trap_id:
869 {
870 __ set_info("predicate_failed_trap", dont_gc_arguments);
871 OopMap* oop_map = save_live_registers(sasm);
872
873 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
874
875 oop_maps = new OopMapSet();
876 oop_maps->add_gc_map(call_offset, oop_map);
877
878 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
879 assert(deopt_blob != NULL, "deoptimization blob must have been created");
880 restore_live_registers(sasm, noreg, noreg);
881
882 address stub = deopt_blob->unpack_with_reexecution();
883 //__ load_const_optimized(R0, stub);
884 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
885 __ mtctr(R0);
886 __ bctr();
887 }
888 break;
889
890 default:
891 unimplemented_entry:
892 {
893 __ set_info("unimplemented entry", dont_gc_arguments);
894 __ mflr(R0);
895 __ std(R0, _abi(lr), R1_SP);
896 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
897 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
898 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
899
900 __ load_const_optimized(R4_ARG2, (int)id);
901 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
902
903 oop_maps = new OopMapSet();
904 oop_maps->add_gc_map(call_offset, oop_map);
905 __ should_not_reach_here();
906 }
907 break;
908 }
909 return oop_maps;
910 }
911
912
913 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
914 __ block_comment("generate_handle_exception");
915
916 // Save registers, if required.
917 OopMapSet* oop_maps = new OopMapSet();
918 OopMap* oop_map = NULL;
919 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
920 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
921
922 switch (id) {
923 case forward_exception_id:
924 // We're handling an exception in the context of a compiled frame.
925 // The registers have been saved in the standard places. Perform
926 // an exception lookup in the caller and dispatch to the handler
927 // if found. Otherwise unwind and dispatch to the callers
928 // exception handler.
929 oop_map = generate_oop_map(sasm, true);
930 // Transfer the pending exception to the exception_oop.
931 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
932 // but we support additional slots in the frame for parameter passing.
933 __ ld(Rexception_pc, 0, R1_SP);
934 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
935 __ li(R0, 0);
936 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
937 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
938 break;
939 case handle_exception_nofpu_id:
940 case handle_exception_id:
941 // At this point all registers MAY be live.
942 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
943 break;
944 case handle_exception_from_callee_id:
945 // At this point all registers except exception oop and exception pc are dead.
946 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
947 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
948 __ std(Rexception_pc, _abi(lr), R1_SP);
949 __ push_frame(frame_size_in_bytes, R0);
950 break;
951 default: ShouldNotReachHere();
952 }
953
954 __ verify_not_null_oop(Rexception);
955
956 #ifdef ASSERT
957 // Check that fields in JavaThread for exception oop and issuing pc are
958 // empty before writing to them.
959 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
960 __ cmpdi(CCR0, R0, 0);
961 __ asm_assert_eq("exception oop already set", 0x963);
962 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
963 __ cmpdi(CCR0, R0, 0);
964 __ asm_assert_eq("exception pc already set", 0x962);
965 #endif
966
967 // Save the exception and issuing pc in the thread.
968 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
969 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
970
971 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
972 oop_maps->add_gc_map(call_offset, oop_map);
973
974 __ mtctr(R3_RET);
975
976 // Note: if nmethod has been deoptimized then regardless of
977 // whether it had a handler or not we will deoptimize
978 // by entering the deopt blob with a pending exception.
979
980 // Restore the registers that were saved at the beginning, remove
981 // the frame and jump to the exception handler.
982 switch (id) {
983 case forward_exception_id:
984 case handle_exception_nofpu_id:
985 case handle_exception_id:
986 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
987 __ bctr();
988 break;
989 case handle_exception_from_callee_id: {
990 __ pop_frame();
991 __ ld(Rexception_pc, _abi(lr), R1_SP);
992 __ mtlr(Rexception_pc);
993 __ bctr();
994 break;
995 }
996 default: ShouldNotReachHere();
997 }
998
999 return oop_maps;
1000 }
1001
1002 const char *Runtime1::pd_name_for_address(address entry) {
1003 return "<unknown function>";
1004 }
1005
1006 #undef __