1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2023 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 "asm/macroAssembler.inline.hpp"
28 #include "c1/c1_Defs.hpp"
29 #include "c1/c1_MacroAssembler.hpp"
30 #include "c1/c1_Runtime1.hpp"
31 #include "ci/ciUtilities.hpp"
32 #include "compiler/oopMap.hpp"
33 #include "gc/shared/cardTable.hpp"
34 #include "gc/shared/cardTableBarrierSet.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "nativeInst_ppc.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "register_ppc.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/signature.hpp"
42 #include "runtime/vframeArray.hpp"
43 #include "utilities/align.hpp"
44 #include "utilities/macros.hpp"
45 #include "utilities/powerOfTwo.hpp"
46 #include "vmreg_ppc.inline.hpp"
47
48 // Implementation of StubAssembler
49
50 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
51 address entry_point, int number_of_arguments) {
52 set_num_rt_args(0); // Nothing on stack
53 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
54 oop_result1 != metadata_result, "registers must be different");
55
56 // Currently no stack banging. We assume that there are enough
57 // StackShadowPages (which have been banged in generate_stack_overflow_check)
58 // for the stub frame and the runtime frames.
59
60 set_last_Java_frame(R1_SP, noreg);
61
62 // ARG1 must hold thread address.
63 mr(R3_ARG1, R16_thread);
64
65 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
66
67 reset_last_Java_frame();
68
69 // Check for pending exceptions.
70 {
71 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
72 cmpdi(CCR0, R0, 0);
73
74 // This used to conditionally jump to forward_exception however it is
75 // possible if we relocate that the branch will not reach. So we must jump
76 // around so we can always reach.
77
78 Label ok;
79 beq(CCR0, ok);
80
81 // Make sure that the vm_results are cleared.
82 if (oop_result1->is_valid() || metadata_result->is_valid()) {
83 li(R0, 0);
84 if (oop_result1->is_valid()) {
85 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
86 }
87 if (metadata_result->is_valid()) {
88 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
89 }
90 }
91
92 if (frame_size() == no_frame_size) {
93 ShouldNotReachHere(); // We always have a frame size.
94 //pop_frame(); // pop the stub frame
95 //ld(R0, _abi0(lr), R1_SP);
96 //mtlr(R0);
97 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
98 //mtctr(R0);
99 //bctr();
100 } else if (_stub_id == Runtime1::forward_exception_id) {
101 should_not_reach_here();
102 } else {
103 // keep stub frame for next call_RT
104 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
105 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
106 mtctr(R0);
107 bctr();
108 }
109
110 bind(ok);
111 }
112
113 // Get oop results if there are any and reset the values in the thread.
114 if (oop_result1->is_valid()) {
115 get_vm_result(oop_result1);
116 }
117 if (metadata_result->is_valid()) {
118 get_vm_result_2(metadata_result);
119 }
120
121 return (int)(return_pc - code_section()->start());
122 }
123
124
125 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
126 mr_if_needed(R4_ARG2, arg1);
127 return call_RT(oop_result1, metadata_result, entry, 1);
128 }
129
130
131 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
132 mr_if_needed(R4_ARG2, arg1);
133 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
134 return call_RT(oop_result1, metadata_result, entry, 2);
135 }
136
137
138 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
139 mr_if_needed(R4_ARG2, arg1);
140 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
141 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
142 return call_RT(oop_result1, metadata_result, entry, 3);
143 }
144
145
146 // Implementation of Runtime1
147
148 #define __ sasm->
149
150 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
151 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
152 static int frame_size_in_bytes = -1;
153
154 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
155 assert(frame_size_in_bytes > frame::native_abi_reg_args_size, "init");
156 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
157 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
158 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
159
160 int i;
161 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
162 Register r = as_Register(i);
163 if (FrameMap::reg_needs_save(r)) {
164 int sp_offset = cpu_reg_save_offsets[i];
165 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
166 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
167 }
168 }
169
170 if (save_fpu_registers) {
171 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
172 FloatRegister r = as_FloatRegister(i);
173 int sp_offset = fpu_reg_save_offsets[i];
174 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
175 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
176 }
177 }
178
179 return oop_map;
180 }
181
182 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
183 Register ret_pc = noreg, int stack_preserve = 0) {
184 if (ret_pc == noreg) {
185 ret_pc = R0;
186 __ mflr(ret_pc);
187 }
188 __ std(ret_pc, _abi0(lr), R1_SP); // C code needs pc in C1 method.
189 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
190
191 // Record volatile registers as callee-save values in an OopMap so
192 // their save locations will be propagated to the caller frame's
193 // RegisterMap during StackFrameStream construction (needed for
194 // deoptimization; see compiledVFrame::create_stack_value).
195 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
196
197 int i;
198 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
199 Register r = as_Register(i);
200 if (FrameMap::reg_needs_save(r)) {
201 int sp_offset = cpu_reg_save_offsets[i];
202 __ std(r, sp_offset, R1_SP);
203 }
204 }
205
206 if (save_fpu_registers) {
207 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
208 FloatRegister r = as_FloatRegister(i);
209 int sp_offset = fpu_reg_save_offsets[i];
210 __ stfd(r, sp_offset, R1_SP);
211 }
212 }
213
214 return generate_oop_map(sasm, save_fpu_registers);
215 }
216
217 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
218 bool restore_fpu_registers = true) {
219 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
220 Register r = as_Register(i);
221 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
222 int sp_offset = cpu_reg_save_offsets[i];
223 __ ld(r, sp_offset, R1_SP);
224 }
225 }
226
227 if (restore_fpu_registers) {
228 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
229 FloatRegister r = as_FloatRegister(i);
230 int sp_offset = fpu_reg_save_offsets[i];
231 __ lfd(r, sp_offset, R1_SP);
232 }
233 }
234
235 __ pop_frame();
236 __ ld(R0, _abi0(lr), R1_SP);
237 __ mtlr(R0);
238 }
239
240
241 void Runtime1::initialize_pd() {
242 int i;
243 int sp_offset = frame::native_abi_reg_args_size;
244
245 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
246 Register r = as_Register(i);
247 if (FrameMap::reg_needs_save(r)) {
248 cpu_reg_save_offsets[i] = sp_offset;
249 sp_offset += BytesPerWord;
250 }
251 }
252
253 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
254 fpu_reg_save_offsets[i] = sp_offset;
255 sp_offset += BytesPerWord;
256 }
257 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes);
258 }
259
260 uint Runtime1::runtime_blob_current_thread_offset(frame f) {
261 Unimplemented();
262 return 0;
263 }
264
265 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
266 // Make a frame and preserve the caller's caller-save registers.
267 OopMap* oop_map = save_live_registers(sasm);
268
269 int call_offset;
270 if (!has_argument) {
271 call_offset = __ call_RT(noreg, noreg, target);
272 } else {
273 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
274 }
275 OopMapSet* oop_maps = new OopMapSet();
276 oop_maps->add_gc_map(call_offset, oop_map);
277
278 __ should_not_reach_here();
279 return oop_maps;
280 }
281
282 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
283 int stack_parms) {
284 // Make a frame and preserve the caller's caller-save registers.
285 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
286 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
287 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
288
289 int call_offset = 0;
290 switch (stack_parms) {
291 case 3:
292 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
293 case 2:
294 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
295 case 1:
296 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
297 case 0:
298 call_offset = __ call_RT(noreg, noreg, target);
299 break;
300 default: Unimplemented(); break;
301 }
302 OopMapSet* oop_maps = new OopMapSet();
303 oop_maps->add_gc_map(call_offset, oop_map);
304
305 __ should_not_reach_here();
306 return oop_maps;
307 }
308
309
310 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
311 Register arg1, Register arg2, Register arg3) {
312 // Make a frame and preserve the caller's caller-save registers.
313 OopMap* oop_map = save_live_registers(sasm);
314
315 int call_offset;
316 if (arg1 == noreg) {
317 call_offset = __ call_RT(result, noreg, target);
318 } else if (arg2 == noreg) {
319 call_offset = __ call_RT(result, noreg, target, arg1);
320 } else if (arg3 == noreg) {
321 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
322 } else {
323 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
324 }
325 OopMapSet* oop_maps = new OopMapSet();
326 oop_maps->add_gc_map(call_offset, oop_map);
327
328 restore_live_registers(sasm, result, noreg);
329 __ blr();
330 return oop_maps;
331 }
332
333 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
334 int stack_parms, bool do_return = true) {
335 // Make a frame and preserve the caller's caller-save registers.
336 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
337 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
338 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
339
340 int call_offset = 0;
341 switch (stack_parms) {
342 case 3:
343 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
344 case 2:
345 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
346 case 1:
347 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
348 case 0:
349 call_offset = __ call_RT(result, noreg, target);
350 break;
351 default: Unimplemented(); break;
352 }
353 OopMapSet* oop_maps = new OopMapSet();
354 oop_maps->add_gc_map(call_offset, oop_map);
355
356 restore_live_registers(sasm, result, noreg);
357 if (do_return) __ blr();
358 return oop_maps;
359 }
360
361
362 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
363 // Make a frame and preserve the caller's caller-save registers.
364 OopMap* oop_map = save_live_registers(sasm);
365
366 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
367 int call_offset = __ call_RT(noreg, noreg, target);
368 OopMapSet* oop_maps = new OopMapSet();
369 oop_maps->add_gc_map(call_offset, oop_map);
370 __ cmpdi(CCR0, R3_RET, 0);
371
372 // Re-execute the patched instruction or, if the nmethod was deoptmized,
373 // return to the deoptimization handler entry that will cause re-execution
374 // of the current bytecode.
375 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
376 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
377
378 // Return to the deoptimization handler entry for unpacking and rexecute.
379 // If we simply returned the we'd deopt as if any call we patched had just
380 // returned.
381
382 restore_live_registers(sasm, noreg, noreg);
383 // Return if patching routine returned 0.
384 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
385
386 address stub = deopt_blob->unpack_with_reexecution();
387 //__ load_const_optimized(R0, stub);
388 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
389 __ mtctr(R0);
390 __ bctr();
391
392 return oop_maps;
393 }
394
395 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
396 OopMapSet* oop_maps = nullptr;
397
398 // For better readability.
399 const bool must_gc_arguments = true;
400 const bool dont_gc_arguments = false;
401
402 // Stub code & info for the different stubs.
403 switch (id) {
404 case forward_exception_id:
405 {
406 oop_maps = generate_handle_exception(id, sasm);
407 }
408 break;
409
410 case new_instance_id:
411 case fast_new_instance_id:
412 case fast_new_instance_init_check_id:
413 {
414 if (id == new_instance_id) {
415 __ set_info("new_instance", dont_gc_arguments);
416 } else if (id == fast_new_instance_id) {
417 __ set_info("fast new_instance", dont_gc_arguments);
418 } else {
419 assert(id == fast_new_instance_init_check_id, "bad StubID");
420 __ set_info("fast new_instance init check", dont_gc_arguments);
421 }
422
423 // We don't support eden allocation.
424
425 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
426 }
427 break;
428
429 case counter_overflow_id:
430 // Bci and method are on stack.
431 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
432 break;
433
434 case new_type_array_id:
435 case new_object_array_id:
436 {
437 if (id == new_type_array_id) {
438 __ set_info("new_type_array", dont_gc_arguments);
439 } else {
440 __ set_info("new_object_array", dont_gc_arguments);
441 }
442
443 #ifdef ASSERT
444 // Assert object type is really an array of the proper kind.
445 {
446 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
447 Label ok;
448 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
449 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
450 __ cmpwi(CCR0, R0, tag);
451 __ beq(CCR0, ok);
452 __ stop("assert(is an array klass)");
453 __ should_not_reach_here();
454 __ bind(ok);
455 }
456 #endif // ASSERT
457
458 // We don't support eden allocation.
459
460 if (id == new_type_array_id) {
461 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
462 } else {
463 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
464 }
465 }
466 break;
467
468 case new_multi_array_id:
469 {
470 // R4: klass
471 // R5: rank
472 // R6: address of 1st dimension
473 __ set_info("new_multi_array", dont_gc_arguments);
474 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
475 }
476 break;
477
478 case register_finalizer_id:
479 {
480 __ set_info("register_finalizer", dont_gc_arguments);
481 // This code is called via rt_call. Hence, caller-save registers have been saved.
482 Register t = R11_scratch1;
483
484 // Load the klass and check the has finalizer flag.
485 __ load_klass(t, R3_ARG1);
486 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
487 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
488 // Return if has_finalizer bit == 0 (CR0.eq).
489 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
490
491 __ mflr(R0);
492 __ std(R0, _abi0(lr), R1_SP);
493 __ push_frame(frame::native_abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
494 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
495 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
496 int call_offset = __ call_RT(noreg, noreg,
497 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
498 oop_maps = new OopMapSet();
499 oop_maps->add_gc_map(call_offset, oop_map);
500
501 __ pop_frame();
502 __ ld(R0, _abi0(lr), R1_SP);
503 __ mtlr(R0);
504 __ blr();
505 }
506 break;
507
508 case throw_range_check_failed_id:
509 {
510 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
511 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
512 }
513 break;
514
515 case throw_index_exception_id:
516 {
517 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
518 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
519 }
520 break;
521
522 case throw_div0_exception_id:
523 {
524 __ set_info("throw_div0_exception", dont_gc_arguments);
525 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
526 }
527 break;
528
529 case throw_null_pointer_exception_id:
530 {
531 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
532 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
533 }
534 break;
535
536 case handle_exception_nofpu_id:
537 case handle_exception_id:
538 {
539 __ set_info("handle_exception", dont_gc_arguments);
540 oop_maps = generate_handle_exception(id, sasm);
541 }
542 break;
543
544 case handle_exception_from_callee_id:
545 {
546 __ set_info("handle_exception_from_callee", dont_gc_arguments);
547 oop_maps = generate_handle_exception(id, sasm);
548 }
549 break;
550
551 case unwind_exception_id:
552 {
553 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
554 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
555 Rexception_save = R31, Rcaller_sp = R30;
556 __ set_info("unwind_exception", dont_gc_arguments);
557
558 if (AbortVMOnException) {
559 save_live_registers(sasm);
560 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), Rexception);
561 restore_live_registers(sasm, noreg, noreg);
562 }
563
564 __ ld(Rcaller_sp, 0, R1_SP);
565 __ push_frame_reg_args(0, R0); // dummy frame for C call
566 __ mr(Rexception_save, Rexception); // save over C call
567 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
568 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
569 __ verify_not_null_oop(Rexception_save);
570 __ mtctr(R3_RET);
571 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
572 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
573 __ mr(Rexception, Rexception_save); // restore
574 __ mtlr(Rexception_pc);
575 __ bctr();
576 }
577 break;
578
579 case throw_array_store_exception_id:
580 {
581 __ set_info("throw_array_store_exception", dont_gc_arguments);
582 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
583 }
584 break;
585
586 case throw_class_cast_exception_id:
587 {
588 __ set_info("throw_class_cast_exception", dont_gc_arguments);
589 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
590 }
591 break;
592
593 case throw_incompatible_class_change_error_id:
594 {
595 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
596 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
597 }
598 break;
599
600 case slow_subtype_check_id:
601 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
602 const Register sub_klass = R5,
603 super_klass = R4,
604 temp1_reg = R6,
605 temp2_reg = R0;
606 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
607 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
608 __ blr();
609 }
610 break;
611
612 case monitorenter_nofpu_id:
613 case monitorenter_id:
614 {
615 __ set_info("monitorenter", dont_gc_arguments);
616
617 int save_fpu_registers = (id == monitorenter_id);
618 // Make a frame and preserve the caller's caller-save registers.
619 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
620
621 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
622
623 oop_maps = new OopMapSet();
624 oop_maps->add_gc_map(call_offset, oop_map);
625
626 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
627 __ blr();
628 }
629 break;
630
631 case monitorexit_nofpu_id:
632 case monitorexit_id:
633 {
634 // note: Really a leaf routine but must setup last java sp
635 // => use call_RT for now (speed can be improved by
636 // doing last java sp setup manually).
637 __ set_info("monitorexit", dont_gc_arguments);
638
639 int save_fpu_registers = (id == monitorexit_id);
640 // Make a frame and preserve the caller's caller-save registers.
641 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
642
643 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
644
645 oop_maps = new OopMapSet();
646 oop_maps->add_gc_map(call_offset, oop_map);
647
648 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
649 __ blr();
650 }
651 break;
652
653 case deoptimize_id:
654 {
655 __ set_info("deoptimize", dont_gc_arguments);
656 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
657 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
658
659 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
660 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
661 address stub = deopt_blob->unpack_with_reexecution();
662 //__ load_const_optimized(R0, stub);
663 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
664 __ mtctr(R0);
665 __ bctr();
666 }
667 break;
668
669 case access_field_patching_id:
670 {
671 __ set_info("access_field_patching", dont_gc_arguments);
672 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
673 }
674 break;
675
676 case load_klass_patching_id:
677 {
678 __ set_info("load_klass_patching", dont_gc_arguments);
679 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
680 }
681 break;
682
683 case load_mirror_patching_id:
684 {
685 __ set_info("load_mirror_patching", dont_gc_arguments);
686 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
687 }
688 break;
689
690 case load_appendix_patching_id:
691 {
692 __ set_info("load_appendix_patching", dont_gc_arguments);
693 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
694 }
695 break;
696
697 case dtrace_object_alloc_id:
698 { // O0: object
699 __ unimplemented("stub dtrace_object_alloc_id");
700 __ set_info("dtrace_object_alloc", dont_gc_arguments);
701 // // We can't gc here so skip the oopmap but make sure that all
702 // // the live registers get saved.
703 // save_live_registers(sasm);
704 //
705 // __ save_thread(L7_thread_cache);
706 // __ call(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)),
707 // relocInfo::runtime_call_type);
708 // __ delayed()->mov(I0, O0);
709 // __ restore_thread(L7_thread_cache);
710 //
711 // restore_live_registers(sasm);
712 // __ ret();
713 // __ delayed()->restore();
714 }
715 break;
716
717 case predicate_failed_trap_id:
718 {
719 __ set_info("predicate_failed_trap", dont_gc_arguments);
720 OopMap* oop_map = save_live_registers(sasm);
721
722 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
723
724 oop_maps = new OopMapSet();
725 oop_maps->add_gc_map(call_offset, oop_map);
726
727 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
728 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
729 restore_live_registers(sasm, noreg, noreg);
730
731 address stub = deopt_blob->unpack_with_reexecution();
732 //__ load_const_optimized(R0, stub);
733 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
734 __ mtctr(R0);
735 __ bctr();
736 }
737 break;
738
739 default:
740 {
741 __ set_info("unimplemented entry", dont_gc_arguments);
742 __ mflr(R0);
743 __ std(R0, _abi0(lr), R1_SP);
744 __ push_frame(frame::native_abi_reg_args_size, R0); // empty dummy frame
745 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
746 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
747
748 __ load_const_optimized(R4_ARG2, (int)id);
749 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
750
751 oop_maps = new OopMapSet();
752 oop_maps->add_gc_map(call_offset, oop_map);
753 __ should_not_reach_here();
754 }
755 break;
756 }
757 return oop_maps;
758 }
759
760
761 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
762 __ block_comment("generate_handle_exception");
763
764 // Save registers, if required.
765 OopMapSet* oop_maps = new OopMapSet();
766 OopMap* oop_map = nullptr;
767 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
768 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
769
770 switch (id) {
771 case forward_exception_id:
772 // We're handling an exception in the context of a compiled frame.
773 // The registers have been saved in the standard places. Perform
774 // an exception lookup in the caller and dispatch to the handler
775 // if found. Otherwise unwind and dispatch to the callers
776 // exception handler.
777 oop_map = generate_oop_map(sasm, true);
778 // Transfer the pending exception to the exception_oop.
779 // Also load the PC which is typically at SP + frame_size_in_bytes +_abi0(lr),
780 // but we support additional slots in the frame for parameter passing.
781 __ ld(Rexception_pc, 0, R1_SP);
782 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
783 __ li(R0, 0);
784 __ ld(Rexception_pc, _abi0(lr), Rexception_pc);
785 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
786 break;
787 case handle_exception_nofpu_id:
788 case handle_exception_id:
789 // At this point all registers MAY be live.
790 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
791 break;
792 case handle_exception_from_callee_id:
793 // At this point all registers except exception oop and exception pc are dead.
794 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
795 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
796 __ std(Rexception_pc, _abi0(lr), R1_SP);
797 __ push_frame(frame_size_in_bytes, R0);
798 break;
799 default: ShouldNotReachHere();
800 }
801
802 __ verify_not_null_oop(Rexception);
803
804 #ifdef ASSERT
805 // Check that fields in JavaThread for exception oop and issuing pc are
806 // empty before writing to them.
807 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
808 __ cmpdi(CCR0, R0, 0);
809 __ asm_assert_eq("exception oop already set");
810 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
811 __ cmpdi(CCR0, R0, 0);
812 __ asm_assert_eq("exception pc already set");
813 #endif
814
815 // Save the exception and issuing pc in the thread.
816 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
817 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
818
819 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
820 oop_maps->add_gc_map(call_offset, oop_map);
821
822 __ mtctr(R3_RET);
823
824 // Note: if nmethod has been deoptimized then regardless of
825 // whether it had a handler or not we will deoptimize
826 // by entering the deopt blob with a pending exception.
827
828 // Restore the registers that were saved at the beginning, remove
829 // the frame and jump to the exception handler.
830 switch (id) {
831 case forward_exception_id:
832 case handle_exception_nofpu_id:
833 case handle_exception_id:
834 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
835 __ bctr();
836 break;
837 case handle_exception_from_callee_id: {
838 __ pop_frame();
839 __ ld(Rexception_pc, _abi0(lr), R1_SP);
840 __ mtlr(Rexception_pc);
841 __ bctr();
842 break;
843 }
844 default: ShouldNotReachHere();
845 }
846
847 return oop_maps;
848 }
849
850 const char *Runtime1::pd_name_for_address(address entry) {
851 return "<unknown function>";
852 }
853
854 #undef __