1 /*
2 * Copyright (c) 1999, 2024, 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(entry_point);
66
67 // Last java sp can be null when the RT call was preempted
68 reset_last_Java_frame(false /* check_last_java_sp */);
69
70 // Check for pending exceptions.
71 {
72 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
73 cmpdi(CCR0, R0, 0);
74
75 // This used to conditionally jump to forward_exception however it is
76 // possible if we relocate that the branch will not reach. So we must jump
77 // around so we can always reach.
78
79 Label ok;
80 beq(CCR0, ok);
81
82 // Make sure that the vm_results are cleared.
83 if (oop_result1->is_valid() || metadata_result->is_valid()) {
84 li(R0, 0);
85 if (oop_result1->is_valid()) {
86 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
87 }
88 if (metadata_result->is_valid()) {
89 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
90 }
91 }
92
93 if (frame_size() == no_frame_size) {
94 ShouldNotReachHere(); // We always have a frame size.
95 //pop_frame(); // pop the stub frame
96 //ld(R0, _abi0(lr), R1_SP);
97 //mtlr(R0);
98 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
99 //mtctr(R0);
100 //bctr();
101 } else if (_stub_id == (int)C1StubId::forward_exception_id) {
102 should_not_reach_here();
103 } else {
104 // keep stub frame for next call_RT
105 //load_const_optimized(R0, Runtime1::entry_for(C1StubId::forward_exception_id));
106 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(C1StubId::forward_exception_id)));
107 mtctr(R0);
108 bctr();
109 }
110
111 bind(ok);
112 }
113
114 // Get oop results if there are any and reset the values in the thread.
115 if (oop_result1->is_valid()) {
116 get_vm_result(oop_result1);
117 }
118 if (metadata_result->is_valid()) {
119 get_vm_result_2(metadata_result);
120 }
121
122 return (int)(return_pc - code_section()->start());
123 }
124
125
126 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
127 mr_if_needed(R4_ARG2, arg1);
128 return call_RT(oop_result1, metadata_result, entry, 1);
129 }
130
131
132 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
133 mr_if_needed(R4_ARG2, arg1);
134 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
135 return call_RT(oop_result1, metadata_result, entry, 2);
136 }
137
138
139 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
140 mr_if_needed(R4_ARG2, arg1);
141 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
142 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
143 return call_RT(oop_result1, metadata_result, entry, 3);
144 }
145
146
147 // Implementation of Runtime1
148
149 #define __ sasm->
150
151 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
152 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
153 static int frame_size_in_bytes = -1;
154
155 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
156 assert(frame_size_in_bytes > frame::native_abi_reg_args_size, "init");
157 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
158 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
159 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
160
161 int i;
162 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
163 Register r = as_Register(i);
164 if (FrameMap::reg_needs_save(r)) {
165 int sp_offset = cpu_reg_save_offsets[i];
166 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
167 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
168 }
169 }
170
171 if (save_fpu_registers) {
172 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
173 FloatRegister r = as_FloatRegister(i);
174 int sp_offset = fpu_reg_save_offsets[i];
175 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
176 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
177 }
178 }
179
180 return oop_map;
181 }
182
183 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
184 Register ret_pc = noreg, int stack_preserve = 0) {
185 if (ret_pc == noreg) {
186 ret_pc = R0;
187 __ mflr(ret_pc);
188 }
189 __ std(ret_pc, _abi0(lr), R1_SP); // C code needs pc in C1 method.
190 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
191
192 // Record volatile registers as callee-save values in an OopMap so
193 // their save locations will be propagated to the caller frame's
194 // RegisterMap during StackFrameStream construction (needed for
195 // deoptimization; see compiledVFrame::create_stack_value).
196 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
197
198 int i;
199 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
200 Register r = as_Register(i);
201 if (FrameMap::reg_needs_save(r)) {
202 int sp_offset = cpu_reg_save_offsets[i];
203 __ std(r, sp_offset, R1_SP);
204 }
205 }
206
207 if (save_fpu_registers) {
208 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
209 FloatRegister r = as_FloatRegister(i);
210 int sp_offset = fpu_reg_save_offsets[i];
211 __ stfd(r, sp_offset, R1_SP);
212 }
213 }
214
215 return generate_oop_map(sasm, save_fpu_registers);
216 }
217
218 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
219 bool restore_fpu_registers = true) {
220 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
221 Register r = as_Register(i);
222 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
223 int sp_offset = cpu_reg_save_offsets[i];
224 __ ld(r, sp_offset, R1_SP);
225 }
226 }
227
228 if (restore_fpu_registers) {
229 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
230 FloatRegister r = as_FloatRegister(i);
231 int sp_offset = fpu_reg_save_offsets[i];
232 __ lfd(r, sp_offset, R1_SP);
233 }
234 }
235
236 __ pop_frame();
237 __ ld(R0, _abi0(lr), R1_SP);
238 __ mtlr(R0);
239 }
240
241
242 void Runtime1::initialize_pd() {
243 int i;
244 int sp_offset = frame::native_abi_reg_args_size;
245
246 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
247 Register r = as_Register(i);
248 if (FrameMap::reg_needs_save(r)) {
249 cpu_reg_save_offsets[i] = sp_offset;
250 sp_offset += BytesPerWord;
251 }
252 }
253
254 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
255 fpu_reg_save_offsets[i] = sp_offset;
256 sp_offset += BytesPerWord;
257 }
258 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes);
259 }
260
261 uint Runtime1::runtime_blob_current_thread_offset(frame f) {
262 // On PPC virtual threads don't save the JavaThread* in their context (e.g. C1 stub frames).
263 ShouldNotCallThis();
264 return 0;
265 }
266
267 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
268 // Make a frame and preserve the caller's caller-save registers.
269 OopMap* oop_map = save_live_registers(sasm);
270
271 int call_offset;
272 if (!has_argument) {
273 call_offset = __ call_RT(noreg, noreg, target);
274 } else {
275 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
276 }
277 OopMapSet* oop_maps = new OopMapSet();
278 oop_maps->add_gc_map(call_offset, oop_map);
279
280 __ should_not_reach_here();
281 return oop_maps;
282 }
283
284 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
285 int stack_parms) {
286 // Make a frame and preserve the caller's caller-save registers.
287 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
288 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
289 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
290
291 int call_offset = 0;
292 switch (stack_parms) {
293 case 3:
294 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
295 case 2:
296 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
297 case 1:
298 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
299 case 0:
300 call_offset = __ call_RT(noreg, noreg, target);
301 break;
302 default: Unimplemented(); break;
303 }
304 OopMapSet* oop_maps = new OopMapSet();
305 oop_maps->add_gc_map(call_offset, oop_map);
306
307 __ should_not_reach_here();
308 return oop_maps;
309 }
310
311
312 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
313 Register arg1, Register arg2, Register arg3) {
314 // Make a frame and preserve the caller's caller-save registers.
315 OopMap* oop_map = save_live_registers(sasm);
316
317 int call_offset;
318 if (arg1 == noreg) {
319 call_offset = __ call_RT(result, noreg, target);
320 } else if (arg2 == noreg) {
321 call_offset = __ call_RT(result, noreg, target, arg1);
322 } else if (arg3 == noreg) {
323 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
324 } else {
325 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
326 }
327 OopMapSet* oop_maps = new OopMapSet();
328 oop_maps->add_gc_map(call_offset, oop_map);
329
330 restore_live_registers(sasm, result, noreg);
331 __ blr();
332 return oop_maps;
333 }
334
335 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
336 int stack_parms, bool do_return = true) {
337 // Make a frame and preserve the caller's caller-save registers.
338 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
339 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
340 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
341
342 int call_offset = 0;
343 switch (stack_parms) {
344 case 3:
345 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
346 case 2:
347 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
348 case 1:
349 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
350 case 0:
351 call_offset = __ call_RT(result, noreg, target);
352 break;
353 default: Unimplemented(); break;
354 }
355 OopMapSet* oop_maps = new OopMapSet();
356 oop_maps->add_gc_map(call_offset, oop_map);
357
358 restore_live_registers(sasm, result, noreg);
359 if (do_return) __ blr();
360 return oop_maps;
361 }
362
363
364 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
365 // Make a frame and preserve the caller's caller-save registers.
366 OopMap* oop_map = save_live_registers(sasm);
367
368 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
369 int call_offset = __ call_RT(noreg, noreg, target);
370 OopMapSet* oop_maps = new OopMapSet();
371 oop_maps->add_gc_map(call_offset, oop_map);
372 __ cmpdi(CCR0, R3_RET, 0);
373
374 // Re-execute the patched instruction or, if the nmethod was deoptmized,
375 // return to the deoptimization handler entry that will cause re-execution
376 // of the current bytecode.
377 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
378 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
379
380 // Return to the deoptimization handler entry for unpacking and rexecute.
381 // If we simply returned the we'd deopt as if any call we patched had just
382 // returned.
383
384 restore_live_registers(sasm, noreg, noreg);
385 // Return if patching routine returned 0.
386 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
387
388 address stub = deopt_blob->unpack_with_reexecution();
389 //__ load_const_optimized(R0, stub);
390 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
391 __ mtctr(R0);
392 __ bctr();
393
394 return oop_maps;
395 }
396
397 OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
398 OopMapSet* oop_maps = nullptr;
399
400 // For better readability.
401 const bool must_gc_arguments = true;
402 const bool dont_gc_arguments = false;
403
404 // Stub code & info for the different stubs.
405 switch (id) {
406 case C1StubId::forward_exception_id:
407 {
408 oop_maps = generate_handle_exception(id, sasm);
409 }
410 break;
411
412 case C1StubId::new_instance_id:
413 case C1StubId::fast_new_instance_id:
414 case C1StubId::fast_new_instance_init_check_id:
415 {
416 if (id == C1StubId::new_instance_id) {
417 __ set_info("new_instance", dont_gc_arguments);
418 } else if (id == C1StubId::fast_new_instance_id) {
419 __ set_info("fast new_instance", dont_gc_arguments);
420 } else {
421 assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId");
422 __ set_info("fast new_instance init check", dont_gc_arguments);
423 }
424
425 // We don't support eden allocation.
426
427 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
428 }
429 break;
430
431 case C1StubId::counter_overflow_id:
432 // Bci and method are on stack.
433 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
434 break;
435
436 case C1StubId::new_type_array_id:
437 case C1StubId::new_object_array_id:
438 {
439 if (id == C1StubId::new_type_array_id) {
440 __ set_info("new_type_array", dont_gc_arguments);
441 } else {
442 __ set_info("new_object_array", dont_gc_arguments);
443 }
444
445 #ifdef ASSERT
446 // Assert object type is really an array of the proper kind.
447 {
448 int tag = (id == C1StubId::new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
449 Label ok;
450 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
451 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
452 __ cmpwi(CCR0, R0, tag);
453 __ beq(CCR0, ok);
454 __ stop("assert(is an array klass)");
455 __ should_not_reach_here();
456 __ bind(ok);
457 }
458 #endif // ASSERT
459
460 // We don't support eden allocation.
461
462 if (id == C1StubId::new_type_array_id) {
463 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
464 } else {
465 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
466 }
467 }
468 break;
469
470 case C1StubId::new_multi_array_id:
471 {
472 // R4: klass
473 // R5: rank
474 // R6: address of 1st dimension
475 __ set_info("new_multi_array", dont_gc_arguments);
476 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
477 }
478 break;
479
480 case C1StubId::register_finalizer_id:
481 {
482 __ set_info("register_finalizer", dont_gc_arguments);
483 // This code is called via rt_call. Hence, caller-save registers have been saved.
484 Register t = R11_scratch1;
485
486 // Load the klass and check the has finalizer flag.
487 __ load_klass(t, R3_ARG1);
488 __ lbz(t, in_bytes(Klass::misc_flags_offset()), t);
489 __ testbitdi(CCR0, R0, t, exact_log2(KlassFlags::_misc_has_finalizer));
490 // Return if has_finalizer bit == 0 (CR0.eq).
491 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
492
493 __ mflr(R0);
494 __ std(R0, _abi0(lr), R1_SP);
495 __ push_frame(frame::native_abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
496 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
497 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
498 int call_offset = __ call_RT(noreg, noreg,
499 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
500 oop_maps = new OopMapSet();
501 oop_maps->add_gc_map(call_offset, oop_map);
502
503 __ pop_frame();
504 __ ld(R0, _abi0(lr), R1_SP);
505 __ mtlr(R0);
506 __ blr();
507 }
508 break;
509
510 case C1StubId::throw_range_check_failed_id:
511 {
512 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
513 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
514 }
515 break;
516
517 case C1StubId::throw_index_exception_id:
518 {
519 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
520 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
521 }
522 break;
523
524 case C1StubId::throw_div0_exception_id:
525 {
526 __ set_info("throw_div0_exception", dont_gc_arguments);
527 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
528 }
529 break;
530
531 case C1StubId::throw_null_pointer_exception_id:
532 {
533 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
534 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
535 }
536 break;
537
538 case C1StubId::handle_exception_nofpu_id:
539 case C1StubId::handle_exception_id:
540 {
541 __ set_info("handle_exception", dont_gc_arguments);
542 oop_maps = generate_handle_exception(id, sasm);
543 }
544 break;
545
546 case C1StubId::handle_exception_from_callee_id:
547 {
548 __ set_info("handle_exception_from_callee", dont_gc_arguments);
549 oop_maps = generate_handle_exception(id, sasm);
550 }
551 break;
552
553 case C1StubId::unwind_exception_id:
554 {
555 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
556 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
557 Rexception_save = R31, Rcaller_sp = R30;
558 __ set_info("unwind_exception", dont_gc_arguments);
559
560 if (AbortVMOnException) {
561 save_live_registers(sasm);
562 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), Rexception);
563 restore_live_registers(sasm, noreg, noreg);
564 }
565
566 __ ld(Rcaller_sp, 0, R1_SP);
567 __ push_frame_reg_args(0, R0); // dummy frame for C call
568 __ mr(Rexception_save, Rexception); // save over C call
569 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
570 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
571 __ verify_not_null_oop(Rexception_save);
572 __ mtctr(R3_RET);
573 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
574 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
575 __ mr(Rexception, Rexception_save); // restore
576 __ mtlr(Rexception_pc);
577 __ bctr();
578 }
579 break;
580
581 case C1StubId::throw_array_store_exception_id:
582 {
583 __ set_info("throw_array_store_exception", dont_gc_arguments);
584 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
585 }
586 break;
587
588 case C1StubId::throw_class_cast_exception_id:
589 {
590 __ set_info("throw_class_cast_exception", dont_gc_arguments);
591 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
592 }
593 break;
594
595 case C1StubId::throw_incompatible_class_change_error_id:
596 {
597 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
598 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
599 }
600 break;
601
602 case C1StubId::slow_subtype_check_id:
603 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
604 const Register sub_klass = R5,
605 super_klass = R4,
606 temp1_reg = R6,
607 temp2_reg = R0;
608 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
609 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
610 __ blr();
611 }
612 break;
613
614 case C1StubId::monitorenter_nofpu_id:
615 case C1StubId::monitorenter_id:
616 {
617 __ set_info("monitorenter", dont_gc_arguments);
618
619 int save_fpu_registers = (id == C1StubId::monitorenter_id);
620 // Make a frame and preserve the caller's caller-save registers.
621 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
622
623 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
624
625 oop_maps = new OopMapSet();
626 oop_maps->add_gc_map(call_offset, oop_map);
627
628 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
629 __ blr();
630 }
631 break;
632
633 case C1StubId::monitorexit_nofpu_id:
634 case C1StubId::monitorexit_id:
635 {
636 // note: Really a leaf routine but must setup last java sp
637 // => use call_RT for now (speed can be improved by
638 // doing last java sp setup manually).
639 __ set_info("monitorexit", dont_gc_arguments);
640
641 int save_fpu_registers = (id == C1StubId::monitorexit_id);
642 // Make a frame and preserve the caller's caller-save registers.
643 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
644
645 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
646
647 oop_maps = new OopMapSet();
648 oop_maps->add_gc_map(call_offset, oop_map);
649
650 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
651 __ blr();
652 }
653 break;
654
655 case C1StubId::deoptimize_id:
656 {
657 __ set_info("deoptimize", dont_gc_arguments);
658 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
659 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
660
661 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
662 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
663 address stub = deopt_blob->unpack_with_reexecution();
664 //__ load_const_optimized(R0, stub);
665 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
666 __ mtctr(R0);
667 __ bctr();
668 }
669 break;
670
671 case C1StubId::access_field_patching_id:
672 {
673 __ set_info("access_field_patching", dont_gc_arguments);
674 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
675 }
676 break;
677
678 case C1StubId::load_klass_patching_id:
679 {
680 __ set_info("load_klass_patching", dont_gc_arguments);
681 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
682 }
683 break;
684
685 case C1StubId::load_mirror_patching_id:
686 {
687 __ set_info("load_mirror_patching", dont_gc_arguments);
688 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
689 }
690 break;
691
692 case C1StubId::load_appendix_patching_id:
693 {
694 __ set_info("load_appendix_patching", dont_gc_arguments);
695 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
696 }
697 break;
698
699 case C1StubId::dtrace_object_alloc_id:
700 { // O0: object
701 __ unimplemented("stub dtrace_object_alloc_id");
702 __ set_info("dtrace_object_alloc", dont_gc_arguments);
703 // // We can't gc here so skip the oopmap but make sure that all
704 // // the live registers get saved.
705 // save_live_registers(sasm);
706 //
707 // __ save_thread(L7_thread_cache);
708 // __ call(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)),
709 // relocInfo::runtime_call_type);
710 // __ delayed()->mov(I0, O0);
711 // __ restore_thread(L7_thread_cache);
712 //
713 // restore_live_registers(sasm);
714 // __ ret();
715 // __ delayed()->restore();
716 }
717 break;
718
719 case C1StubId::predicate_failed_trap_id:
720 {
721 __ set_info("predicate_failed_trap", dont_gc_arguments);
722 OopMap* oop_map = save_live_registers(sasm);
723
724 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
725
726 oop_maps = new OopMapSet();
727 oop_maps->add_gc_map(call_offset, oop_map);
728
729 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
730 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
731 restore_live_registers(sasm, noreg, noreg);
732
733 address stub = deopt_blob->unpack_with_reexecution();
734 //__ load_const_optimized(R0, stub);
735 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
736 __ mtctr(R0);
737 __ bctr();
738 }
739 break;
740
741 default:
742 {
743 __ set_info("unimplemented entry", dont_gc_arguments);
744 __ mflr(R0);
745 __ std(R0, _abi0(lr), R1_SP);
746 __ push_frame(frame::native_abi_reg_args_size, R0); // empty dummy frame
747 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
748 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
749
750 __ load_const_optimized(R4_ARG2, (int)id);
751 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
752
753 oop_maps = new OopMapSet();
754 oop_maps->add_gc_map(call_offset, oop_map);
755 __ should_not_reach_here();
756 }
757 break;
758 }
759 return oop_maps;
760 }
761
762
763 OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler* sasm) {
764 __ block_comment("generate_handle_exception");
765
766 // Save registers, if required.
767 OopMapSet* oop_maps = new OopMapSet();
768 OopMap* oop_map = nullptr;
769 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
770 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
771
772 switch (id) {
773 case C1StubId::forward_exception_id:
774 // We're handling an exception in the context of a compiled frame.
775 // The registers have been saved in the standard places. Perform
776 // an exception lookup in the caller and dispatch to the handler
777 // if found. Otherwise unwind and dispatch to the callers
778 // exception handler.
779 oop_map = generate_oop_map(sasm, true);
780 // Transfer the pending exception to the exception_oop.
781 // Also load the PC which is typically at SP + frame_size_in_bytes +_abi0(lr),
782 // but we support additional slots in the frame for parameter passing.
783 __ ld(Rexception_pc, 0, R1_SP);
784 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
785 __ li(R0, 0);
786 __ ld(Rexception_pc, _abi0(lr), Rexception_pc);
787 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
788 break;
789 case C1StubId::handle_exception_nofpu_id:
790 case C1StubId::handle_exception_id:
791 // At this point all registers MAY be live.
792 oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id, Rexception_pc);
793 break;
794 case C1StubId::handle_exception_from_callee_id:
795 // At this point all registers except exception oop and exception pc are dead.
796 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
797 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
798 __ std(Rexception_pc, _abi0(lr), R1_SP);
799 __ push_frame(frame_size_in_bytes, R0);
800 break;
801 default: ShouldNotReachHere();
802 }
803
804 __ verify_not_null_oop(Rexception);
805
806 #ifdef ASSERT
807 // Check that fields in JavaThread for exception oop and issuing pc are
808 // empty before writing to them.
809 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
810 __ cmpdi(CCR0, R0, 0);
811 __ asm_assert_eq("exception oop already set");
812 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
813 __ cmpdi(CCR0, R0, 0);
814 __ asm_assert_eq("exception pc already set");
815 #endif
816
817 // Save the exception and issuing pc in the thread.
818 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
819 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
820
821 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
822 oop_maps->add_gc_map(call_offset, oop_map);
823
824 __ mtctr(R3_RET);
825
826 // Note: if nmethod has been deoptimized then regardless of
827 // whether it had a handler or not we will deoptimize
828 // by entering the deopt blob with a pending exception.
829
830 // Restore the registers that were saved at the beginning, remove
831 // the frame and jump to the exception handler.
832 switch (id) {
833 case C1StubId::forward_exception_id:
834 case C1StubId::handle_exception_nofpu_id:
835 case C1StubId::handle_exception_id:
836 restore_live_registers(sasm, noreg, noreg, id != C1StubId::handle_exception_nofpu_id);
837 __ bctr();
838 break;
839 case C1StubId::handle_exception_from_callee_id: {
840 __ pop_frame();
841 __ ld(Rexception_pc, _abi0(lr), R1_SP);
842 __ mtlr(Rexception_pc);
843 __ bctr();
844 break;
845 }
846 default: ShouldNotReachHere();
847 }
848
849 return oop_maps;
850 }
851
852 const char *Runtime1::pd_name_for_address(address entry) {
853 return "<unknown function>";
854 }
855
856 #undef __