1 /*
2 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2025 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 "asm/macroAssembler.inline.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 "compiler/oopMap.hpp"
32 #include "gc/shared/cardTable.hpp"
33 #include "gc/shared/cardTableBarrierSet.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "nativeInst_ppc.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 "utilities/powerOfTwo.hpp"
45 #include "vmreg_ppc.inline.hpp"
46
47 // Implementation of StubAssembler
48
49 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
50 address entry_point, int number_of_arguments) {
51 set_num_rt_args(0); // Nothing on stack
52 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
53 oop_result1 != metadata_result, "registers must be different");
54
55 // Currently no stack banging. We assume that there are enough
56 // StackShadowPages (which have been banged in generate_stack_overflow_check)
57 // for the stub frame and the runtime frames.
58
59 set_last_Java_frame(R1_SP, noreg);
60
61 // ARG1 must hold thread address.
62 mr(R3_ARG1, R16_thread);
63
64 address return_pc = call_c(entry_point);
65
66 // Last java sp can be null when the RT call was preempted
67 reset_last_Java_frame(false /* check_last_java_sp */);
68
69 // Check for pending exceptions.
70 {
71 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
72 cmpdi(CR0, 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(CR0, 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_oop_offset()), R16_thread);
86 }
87 if (metadata_result->is_valid()) {
88 std(R0, in_bytes(JavaThread::vm_result_metadata_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 == (int)C1StubId::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(C1StubId::forward_exception_id));
105 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(C1StubId::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(oop_result1);
116 }
117 if (metadata_result->is_valid()) {
118 get_vm_result_metadata(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 }
167 }
168
169 if (save_fpu_registers) {
170 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
171 FloatRegister r = as_FloatRegister(i);
172 int sp_offset = fpu_reg_save_offsets[i];
173 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset >> 2), r->as_VMReg());
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, _abi0(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, 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, 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, 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, R1_SP);
230 }
231 }
232
233 __ pop_frame();
234 __ ld(R0, _abi0(lr), R1_SP);
235 __ mtlr(R0);
236 }
237
238
239 void Runtime1::initialize_pd() {
240 int i;
241 int sp_offset = frame::native_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, frame::alignment_in_bytes);
256 }
257
258 uint Runtime1::runtime_blob_current_thread_offset(frame f) {
259 // On PPC virtual threads don't save the JavaThread* in their context (e.g. C1 stub frames).
260 ShouldNotCallThis();
261 return 0;
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(CR0, 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 != nullptr, "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(CR0, 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(C1StubId id, StubAssembler* sasm) {
395 OopMapSet* oop_maps = nullptr;
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 C1StubId::forward_exception_id:
404 {
405 oop_maps = generate_handle_exception(id, sasm);
406 }
407 break;
408
409 case C1StubId::new_instance_id:
410 case C1StubId::fast_new_instance_id:
411 case C1StubId::fast_new_instance_init_check_id:
412 {
413 if (id == C1StubId::new_instance_id) {
414 __ set_info("new_instance", dont_gc_arguments);
415 } else if (id == C1StubId::fast_new_instance_id) {
416 __ set_info("fast new_instance", dont_gc_arguments);
417 } else {
418 assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId");
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 C1StubId::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 C1StubId::new_type_array_id:
434 case C1StubId::new_object_array_id:
435 {
436 if (id == C1StubId::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 == C1StubId::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(CR0, R0, tag);
450 __ beq(CR0, 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 == C1StubId::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 C1StubId::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 C1StubId::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 __ lbz(t, in_bytes(Klass::misc_flags_offset()), t);
486 __ testbitdi(CR0, R0, t, exact_log2(KlassFlags::_misc_has_finalizer));
487 // Return if has_finalizer bit == 0 (CR0.eq).
488 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
489
490 __ mflr(R0);
491 __ std(R0, _abi0(lr), R1_SP);
492 __ push_frame(frame::native_abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
493 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
494 OopMap* oop_map = new OopMap(frame::native_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, _abi0(lr), R1_SP);
502 __ mtlr(R0);
503 __ blr();
504 }
505 break;
506
507 case C1StubId::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 C1StubId::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 C1StubId::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 C1StubId::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 C1StubId::handle_exception_nofpu_id:
536 case C1StubId::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 C1StubId::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 C1StubId::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 if (AbortVMOnException) {
558 save_live_registers(sasm);
559 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), Rexception);
560 restore_live_registers(sasm, noreg, noreg);
561 }
562
563 __ ld(Rcaller_sp, 0, R1_SP);
564 __ push_frame_reg_args(0, R0); // dummy frame for C call
565 __ mr(Rexception_save, Rexception); // save over C call
566 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
567 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
568 __ verify_not_null_oop(Rexception_save);
569 __ mtctr(R3_RET);
570 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
571 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
572 __ mr(Rexception, Rexception_save); // restore
573 __ mtlr(Rexception_pc);
574 __ bctr();
575 }
576 break;
577
578 case C1StubId::throw_array_store_exception_id:
579 {
580 __ set_info("throw_array_store_exception", dont_gc_arguments);
581 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
582 }
583 break;
584
585 case C1StubId::throw_class_cast_exception_id:
586 {
587 __ set_info("throw_class_cast_exception", dont_gc_arguments);
588 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
589 }
590 break;
591
592 case C1StubId::throw_incompatible_class_change_error_id:
593 {
594 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
595 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
596 }
597 break;
598
599 case C1StubId::slow_subtype_check_id:
600 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
601 const Register sub_klass = R5,
602 super_klass = R4,
603 temp1_reg = R6;
604 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, noreg);
605 // Result is in CR0.
606 __ blr();
607 }
608 break;
609
610 case C1StubId::is_instance_of_id:
611 {
612 // Called like a C function, but without FunctionDescriptor (see LIR_Assembler::rt_call).
613
614 // Arguments and return value.
615 Register mirror = R3_ARG1;
616 Register obj = R4_ARG2;
617 Register result = R3_RET;
618
619 // Other argument registers can be used as temp registers.
620 Register klass = R5;
621 Register offset = R6;
622 Register sub_klass = R7;
623
624 Label is_secondary, success;
625
626 // Get the Klass*.
627 __ ld(klass, java_lang_Class::klass_offset(), mirror);
628
629 // Return false if obj or klass is null.
630 mirror = noreg; // killed by next instruction
631 __ li(result, 0); // assume result is false
632 __ cmpdi(CR0, obj, 0);
633 __ cmpdi(CR1, klass, 0);
634 __ cror(CR0, Assembler::equal, CR1, Assembler::equal);
635 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
636
637 __ lwz(offset, in_bytes(Klass::super_check_offset_offset()), klass);
638 __ load_klass(sub_klass, obj);
639 __ cmpwi(CR0, offset, in_bytes(Klass::secondary_super_cache_offset()));
640 __ beq(CR0, is_secondary); // Klass is a secondary superclass
641
642 // Klass is a concrete class
643 __ ldx(R0, sub_klass, offset);
644 __ cmpd(CR0, klass, R0);
645 if (VM_Version::has_brw()) {
646 // Power10 can set the result by one instruction. No need for a branch.
647 __ setbc(result, CR0, Assembler::equal);
648 } else {
649 __ beq(CR0, success);
650 }
651 __ blr();
652
653 __ bind(is_secondary);
654
655 // This is necessary because I am never in my own secondary_super list.
656 __ cmpd(CR0, sub_klass, klass);
657 __ beq(CR0, success);
658
659 __ lookup_secondary_supers_table_var(sub_klass, klass,
660 /*temps*/R9, R10, R11, R12,
661 /*result*/R8);
662 __ cmpdi(CR0, R8, 0); // 0 means is subclass
663 if (VM_Version::has_brw()) {
664 // Power10 can set the result by one instruction. No need for a branch.
665 __ setbc(result, CR0, Assembler::equal);
666 } else {
667 __ beq(CR0, success);
668 }
669 __ blr();
670
671 __ bind(success);
672 __ li(result, 1);
673 __ blr();
674 }
675 break;
676
677 case C1StubId::monitorenter_nofpu_id:
678 case C1StubId::monitorenter_id:
679 {
680 __ set_info("monitorenter", dont_gc_arguments);
681
682 int save_fpu_registers = (id == C1StubId::monitorenter_id);
683 // Make a frame and preserve the caller's caller-save registers.
684 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
685
686 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
687
688 oop_maps = new OopMapSet();
689 oop_maps->add_gc_map(call_offset, oop_map);
690
691 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
692 __ blr();
693 }
694 break;
695
696 case C1StubId::monitorexit_nofpu_id:
697 case C1StubId::monitorexit_id:
698 {
699 // note: Really a leaf routine but must setup last java sp
700 // => use call_RT for now (speed can be improved by
701 // doing last java sp setup manually).
702 __ set_info("monitorexit", dont_gc_arguments);
703
704 int save_fpu_registers = (id == C1StubId::monitorexit_id);
705 // Make a frame and preserve the caller's caller-save registers.
706 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
707
708 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
709
710 oop_maps = new OopMapSet();
711 oop_maps->add_gc_map(call_offset, oop_map);
712
713 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
714 __ blr();
715 }
716 break;
717
718 case C1StubId::deoptimize_id:
719 {
720 __ set_info("deoptimize", dont_gc_arguments);
721 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
722 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
723
724 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
725 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
726 address stub = deopt_blob->unpack_with_reexecution();
727 //__ load_const_optimized(R0, stub);
728 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
729 __ mtctr(R0);
730 __ bctr();
731 }
732 break;
733
734 case C1StubId::access_field_patching_id:
735 {
736 __ set_info("access_field_patching", dont_gc_arguments);
737 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
738 }
739 break;
740
741 case C1StubId::load_klass_patching_id:
742 {
743 __ set_info("load_klass_patching", dont_gc_arguments);
744 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
745 }
746 break;
747
748 case C1StubId::load_mirror_patching_id:
749 {
750 __ set_info("load_mirror_patching", dont_gc_arguments);
751 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
752 }
753 break;
754
755 case C1StubId::load_appendix_patching_id:
756 {
757 __ set_info("load_appendix_patching", dont_gc_arguments);
758 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
759 }
760 break;
761
762 case C1StubId::dtrace_object_alloc_id:
763 { // O0: object
764 __ unimplemented("stub dtrace_object_alloc_id");
765 __ set_info("dtrace_object_alloc", dont_gc_arguments);
766 // // We can't gc here so skip the oopmap but make sure that all
767 // // the live registers get saved.
768 // save_live_registers(sasm);
769 //
770 // __ save_thread(L7_thread_cache);
771 // __ call(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)),
772 // relocInfo::runtime_call_type);
773 // __ delayed()->mov(I0, O0);
774 // __ restore_thread(L7_thread_cache);
775 //
776 // restore_live_registers(sasm);
777 // __ ret();
778 // __ delayed()->restore();
779 }
780 break;
781
782 case C1StubId::predicate_failed_trap_id:
783 {
784 __ set_info("predicate_failed_trap", dont_gc_arguments);
785 OopMap* oop_map = save_live_registers(sasm);
786
787 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
788
789 oop_maps = new OopMapSet();
790 oop_maps->add_gc_map(call_offset, oop_map);
791
792 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
793 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
794 restore_live_registers(sasm, noreg, noreg);
795
796 address stub = deopt_blob->unpack_with_reexecution();
797 //__ load_const_optimized(R0, stub);
798 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
799 __ mtctr(R0);
800 __ bctr();
801 }
802 break;
803
804 default:
805 {
806 __ set_info("unimplemented entry", dont_gc_arguments);
807 __ mflr(R0);
808 __ std(R0, _abi0(lr), R1_SP);
809 __ push_frame(frame::native_abi_reg_args_size, R0); // empty dummy frame
810 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
811 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
812
813 __ load_const_optimized(R4_ARG2, (int)id);
814 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
815
816 oop_maps = new OopMapSet();
817 oop_maps->add_gc_map(call_offset, oop_map);
818 __ should_not_reach_here();
819 }
820 break;
821 }
822 return oop_maps;
823 }
824
825
826 OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler* sasm) {
827 __ block_comment("generate_handle_exception");
828
829 // Save registers, if required.
830 OopMapSet* oop_maps = new OopMapSet();
831 OopMap* oop_map = nullptr;
832 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
833 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
834
835 switch (id) {
836 case C1StubId::forward_exception_id:
837 // We're handling an exception in the context of a compiled frame.
838 // The registers have been saved in the standard places. Perform
839 // an exception lookup in the caller and dispatch to the handler
840 // if found. Otherwise unwind and dispatch to the callers
841 // exception handler.
842 oop_map = generate_oop_map(sasm, true);
843 // Transfer the pending exception to the exception_oop.
844 // Also load the PC which is typically at SP + frame_size_in_bytes +_abi0(lr),
845 // but we support additional slots in the frame for parameter passing.
846 __ ld(Rexception_pc, 0, R1_SP);
847 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
848 __ li(R0, 0);
849 __ ld(Rexception_pc, _abi0(lr), Rexception_pc);
850 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
851 break;
852 case C1StubId::handle_exception_nofpu_id:
853 case C1StubId::handle_exception_id:
854 // At this point all registers MAY be live.
855 oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id, Rexception_pc);
856 break;
857 case C1StubId::handle_exception_from_callee_id:
858 // At this point all registers except exception oop and exception pc are dead.
859 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
860 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
861 __ std(Rexception_pc, _abi0(lr), R1_SP);
862 __ push_frame(frame_size_in_bytes, R0);
863 break;
864 default: ShouldNotReachHere();
865 }
866
867 __ verify_not_null_oop(Rexception);
868
869 #ifdef ASSERT
870 // Check that fields in JavaThread for exception oop and issuing pc are
871 // empty before writing to them.
872 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
873 __ cmpdi(CR0, R0, 0);
874 __ asm_assert_eq("exception oop already set");
875 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
876 __ cmpdi(CR0, R0, 0);
877 __ asm_assert_eq("exception pc already set");
878 #endif
879
880 // Save the exception and issuing pc in the thread.
881 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
882 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
883
884 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
885 oop_maps->add_gc_map(call_offset, oop_map);
886
887 __ mtctr(R3_RET);
888
889 // Note: if nmethod has been deoptimized then regardless of
890 // whether it had a handler or not we will deoptimize
891 // by entering the deopt blob with a pending exception.
892
893 // Restore the registers that were saved at the beginning, remove
894 // the frame and jump to the exception handler.
895 switch (id) {
896 case C1StubId::forward_exception_id:
897 case C1StubId::handle_exception_nofpu_id:
898 case C1StubId::handle_exception_id:
899 restore_live_registers(sasm, noreg, noreg, id != C1StubId::handle_exception_nofpu_id);
900 __ bctr();
901 break;
902 case C1StubId::handle_exception_from_callee_id: {
903 __ pop_frame();
904 __ ld(Rexception_pc, _abi0(lr), R1_SP);
905 __ mtlr(Rexception_pc);
906 __ bctr();
907 break;
908 }
909 default: ShouldNotReachHere();
910 }
911
912 return oop_maps;
913 }
914
915 const char *Runtime1::pd_name_for_address(address entry) {
916 return "<unknown function>";
917 }
918
919 #undef __