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
261 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
262 // Make a frame and preserve the caller's caller-save registers.
263 OopMap* oop_map = save_live_registers(sasm);
264
265 int call_offset;
266 if (!has_argument) {
267 call_offset = __ call_RT(noreg, noreg, target);
268 } else {
269 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
270 }
271 OopMapSet* oop_maps = new OopMapSet();
272 oop_maps->add_gc_map(call_offset, oop_map);
273
274 __ should_not_reach_here();
275 return oop_maps;
276 }
277
278 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
279 int stack_parms) {
280 // Make a frame and preserve the caller's caller-save registers.
281 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
282 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
283 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
284
285 int call_offset = 0;
286 switch (stack_parms) {
287 case 3:
288 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
289 case 2:
290 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
291 case 1:
292 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
293 case 0:
294 call_offset = __ call_RT(noreg, noreg, target);
295 break;
296 default: Unimplemented(); break;
297 }
298 OopMapSet* oop_maps = new OopMapSet();
299 oop_maps->add_gc_map(call_offset, oop_map);
300
301 __ should_not_reach_here();
302 return oop_maps;
303 }
304
305
306 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
307 Register arg1, Register arg2, Register arg3) {
308 // Make a frame and preserve the caller's caller-save registers.
309 OopMap* oop_map = save_live_registers(sasm);
310
311 int call_offset;
312 if (arg1 == noreg) {
313 call_offset = __ call_RT(result, noreg, target);
314 } else if (arg2 == noreg) {
315 call_offset = __ call_RT(result, noreg, target, arg1);
316 } else if (arg3 == noreg) {
317 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
318 } else {
319 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
320 }
321 OopMapSet* oop_maps = new OopMapSet();
322 oop_maps->add_gc_map(call_offset, oop_map);
323
324 restore_live_registers(sasm, result, noreg);
325 __ blr();
326 return oop_maps;
327 }
328
329 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
330 int stack_parms, bool do_return = true) {
331 // Make a frame and preserve the caller's caller-save registers.
332 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
333 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
334 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
335
336 int call_offset = 0;
337 switch (stack_parms) {
338 case 3:
339 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
340 case 2:
341 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
342 case 1:
343 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
344 case 0:
345 call_offset = __ call_RT(result, noreg, target);
346 break;
347 default: Unimplemented(); break;
348 }
349 OopMapSet* oop_maps = new OopMapSet();
350 oop_maps->add_gc_map(call_offset, oop_map);
351
352 restore_live_registers(sasm, result, noreg);
353 if (do_return) __ blr();
354 return oop_maps;
355 }
356
357
358 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
359 // Make a frame and preserve the caller's caller-save registers.
360 OopMap* oop_map = save_live_registers(sasm);
361
362 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
363 int call_offset = __ call_RT(noreg, noreg, target);
364 OopMapSet* oop_maps = new OopMapSet();
365 oop_maps->add_gc_map(call_offset, oop_map);
366 __ cmpdi(CCR0, R3_RET, 0);
367
368 // Re-execute the patched instruction or, if the nmethod was deoptmized,
369 // return to the deoptimization handler entry that will cause re-execution
370 // of the current bytecode.
371 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
372 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
373
374 // Return to the deoptimization handler entry for unpacking and rexecute.
375 // If we simply returned the we'd deopt as if any call we patched had just
376 // returned.
377
378 restore_live_registers(sasm, noreg, noreg);
379 // Return if patching routine returned 0.
380 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
381
382 address stub = deopt_blob->unpack_with_reexecution();
383 //__ load_const_optimized(R0, stub);
384 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
385 __ mtctr(R0);
386 __ bctr();
387
388 return oop_maps;
389 }
390
391 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
392 OopMapSet* oop_maps = nullptr;
393
394 // For better readability.
395 const bool must_gc_arguments = true;
396 const bool dont_gc_arguments = false;
397
398 // Stub code & info for the different stubs.
399 switch (id) {
400 case forward_exception_id:
401 {
402 oop_maps = generate_handle_exception(id, sasm);
403 }
404 break;
405
406 case new_instance_id:
407 case fast_new_instance_id:
408 case fast_new_instance_init_check_id:
409 {
410 if (id == new_instance_id) {
411 __ set_info("new_instance", dont_gc_arguments);
412 } else if (id == fast_new_instance_id) {
413 __ set_info("fast new_instance", dont_gc_arguments);
414 } else {
415 assert(id == fast_new_instance_init_check_id, "bad StubID");
416 __ set_info("fast new_instance init check", dont_gc_arguments);
417 }
418
419 // We don't support eden allocation.
420
421 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
422 }
423 break;
424
425 case counter_overflow_id:
426 // Bci and method are on stack.
427 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
428 break;
429
430 case new_type_array_id:
431 case new_object_array_id:
432 {
433 if (id == new_type_array_id) {
434 __ set_info("new_type_array", dont_gc_arguments);
435 } else {
436 __ set_info("new_object_array", dont_gc_arguments);
437 }
438
439 #ifdef ASSERT
440 // Assert object type is really an array of the proper kind.
441 {
442 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
443 Label ok;
444 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
445 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
446 __ cmpwi(CCR0, R0, tag);
447 __ beq(CCR0, ok);
448 __ stop("assert(is an array klass)");
449 __ should_not_reach_here();
450 __ bind(ok);
451 }
452 #endif // ASSERT
453
454 // We don't support eden allocation.
455
456 if (id == new_type_array_id) {
457 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
458 } else {
459 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
460 }
461 }
462 break;
463
464 case new_multi_array_id:
465 {
466 // R4: klass
467 // R5: rank
468 // R6: address of 1st dimension
469 __ set_info("new_multi_array", dont_gc_arguments);
470 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
471 }
472 break;
473
474 case register_finalizer_id:
475 {
476 __ set_info("register_finalizer", dont_gc_arguments);
477 // This code is called via rt_call. Hence, caller-save registers have been saved.
478 Register t = R11_scratch1;
479
480 // Load the klass and check the has finalizer flag.
481 __ load_klass(t, R3_ARG1);
482 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
483 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
484 // Return if has_finalizer bit == 0 (CR0.eq).
485 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
486
487 __ mflr(R0);
488 __ std(R0, _abi0(lr), R1_SP);
489 __ push_frame(frame::native_abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
490 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
491 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
492 int call_offset = __ call_RT(noreg, noreg,
493 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
494 oop_maps = new OopMapSet();
495 oop_maps->add_gc_map(call_offset, oop_map);
496
497 __ pop_frame();
498 __ ld(R0, _abi0(lr), R1_SP);
499 __ mtlr(R0);
500 __ blr();
501 }
502 break;
503
504 case throw_range_check_failed_id:
505 {
506 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
507 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
508 }
509 break;
510
511 case throw_index_exception_id:
512 {
513 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
514 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
515 }
516 break;
517
518 case throw_div0_exception_id:
519 {
520 __ set_info("throw_div0_exception", dont_gc_arguments);
521 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
522 }
523 break;
524
525 case throw_null_pointer_exception_id:
526 {
527 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
528 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
529 }
530 break;
531
532 case handle_exception_nofpu_id:
533 case handle_exception_id:
534 {
535 __ set_info("handle_exception", dont_gc_arguments);
536 oop_maps = generate_handle_exception(id, sasm);
537 }
538 break;
539
540 case handle_exception_from_callee_id:
541 {
542 __ set_info("handle_exception_from_callee", dont_gc_arguments);
543 oop_maps = generate_handle_exception(id, sasm);
544 }
545 break;
546
547 case unwind_exception_id:
548 {
549 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
550 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
551 Rexception_save = R31, Rcaller_sp = R30;
552 __ set_info("unwind_exception", dont_gc_arguments);
553
554 if (AbortVMOnException) {
555 save_live_registers(sasm);
556 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), Rexception);
557 restore_live_registers(sasm, noreg, noreg);
558 }
559
560 __ ld(Rcaller_sp, 0, R1_SP);
561 __ push_frame_reg_args(0, R0); // dummy frame for C call
562 __ mr(Rexception_save, Rexception); // save over C call
563 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
564 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
565 __ verify_not_null_oop(Rexception_save);
566 __ mtctr(R3_RET);
567 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc
568 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
569 __ mr(Rexception, Rexception_save); // restore
570 __ mtlr(Rexception_pc);
571 __ bctr();
572 }
573 break;
574
575 case throw_array_store_exception_id:
576 {
577 __ set_info("throw_array_store_exception", dont_gc_arguments);
578 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
579 }
580 break;
581
582 case throw_class_cast_exception_id:
583 {
584 __ set_info("throw_class_cast_exception", dont_gc_arguments);
585 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
586 }
587 break;
588
589 case throw_incompatible_class_change_error_id:
590 {
591 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
592 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
593 }
594 break;
595
596 case slow_subtype_check_id:
597 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
598 const Register sub_klass = R5,
599 super_klass = R4,
600 temp1_reg = R6,
601 temp2_reg = R0;
602 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
603 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
604 __ blr();
605 }
606 break;
607
608 case monitorenter_nofpu_id:
609 case monitorenter_id:
610 {
611 __ set_info("monitorenter", dont_gc_arguments);
612
613 int save_fpu_registers = (id == monitorenter_id);
614 // Make a frame and preserve the caller's caller-save registers.
615 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
616
617 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
618
619 oop_maps = new OopMapSet();
620 oop_maps->add_gc_map(call_offset, oop_map);
621
622 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
623 __ blr();
624 }
625 break;
626
627 case monitorexit_nofpu_id:
628 case monitorexit_id:
629 {
630 // note: Really a leaf routine but must setup last java sp
631 // => use call_RT for now (speed can be improved by
632 // doing last java sp setup manually).
633 __ set_info("monitorexit", dont_gc_arguments);
634
635 int save_fpu_registers = (id == monitorexit_id);
636 // Make a frame and preserve the caller's caller-save registers.
637 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
638
639 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
640
641 oop_maps = new OopMapSet();
642 oop_maps->add_gc_map(call_offset, oop_map);
643
644 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
645 __ blr();
646 }
647 break;
648
649 case deoptimize_id:
650 {
651 __ set_info("deoptimize", dont_gc_arguments);
652 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
653 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
654
655 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
656 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
657 address stub = deopt_blob->unpack_with_reexecution();
658 //__ load_const_optimized(R0, stub);
659 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
660 __ mtctr(R0);
661 __ bctr();
662 }
663 break;
664
665 case access_field_patching_id:
666 {
667 __ set_info("access_field_patching", dont_gc_arguments);
668 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
669 }
670 break;
671
672 case load_klass_patching_id:
673 {
674 __ set_info("load_klass_patching", dont_gc_arguments);
675 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
676 }
677 break;
678
679 case load_mirror_patching_id:
680 {
681 __ set_info("load_mirror_patching", dont_gc_arguments);
682 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
683 }
684 break;
685
686 case load_appendix_patching_id:
687 {
688 __ set_info("load_appendix_patching", dont_gc_arguments);
689 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
690 }
691 break;
692
693 case dtrace_object_alloc_id:
694 { // O0: object
695 __ unimplemented("stub dtrace_object_alloc_id");
696 __ set_info("dtrace_object_alloc", dont_gc_arguments);
697 // // We can't gc here so skip the oopmap but make sure that all
698 // // the live registers get saved.
699 // save_live_registers(sasm);
700 //
701 // __ save_thread(L7_thread_cache);
702 // __ call(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)),
703 // relocInfo::runtime_call_type);
704 // __ delayed()->mov(I0, O0);
705 // __ restore_thread(L7_thread_cache);
706 //
707 // restore_live_registers(sasm);
708 // __ ret();
709 // __ delayed()->restore();
710 }
711 break;
712
713 case predicate_failed_trap_id:
714 {
715 __ set_info("predicate_failed_trap", dont_gc_arguments);
716 OopMap* oop_map = save_live_registers(sasm);
717
718 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
719
720 oop_maps = new OopMapSet();
721 oop_maps->add_gc_map(call_offset, oop_map);
722
723 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
724 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
725 restore_live_registers(sasm, noreg, noreg);
726
727 address stub = deopt_blob->unpack_with_reexecution();
728 //__ load_const_optimized(R0, stub);
729 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
730 __ mtctr(R0);
731 __ bctr();
732 }
733 break;
734
735 default:
736 {
737 __ set_info("unimplemented entry", dont_gc_arguments);
738 __ mflr(R0);
739 __ std(R0, _abi0(lr), R1_SP);
740 __ push_frame(frame::native_abi_reg_args_size, R0); // empty dummy frame
741 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord);
742 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0);
743
744 __ load_const_optimized(R4_ARG2, (int)id);
745 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
746
747 oop_maps = new OopMapSet();
748 oop_maps->add_gc_map(call_offset, oop_map);
749 __ should_not_reach_here();
750 }
751 break;
752 }
753 return oop_maps;
754 }
755
756
757 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
758 __ block_comment("generate_handle_exception");
759
760 // Save registers, if required.
761 OopMapSet* oop_maps = new OopMapSet();
762 OopMap* oop_map = nullptr;
763 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
764 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
765
766 switch (id) {
767 case forward_exception_id:
768 // We're handling an exception in the context of a compiled frame.
769 // The registers have been saved in the standard places. Perform
770 // an exception lookup in the caller and dispatch to the handler
771 // if found. Otherwise unwind and dispatch to the callers
772 // exception handler.
773 oop_map = generate_oop_map(sasm, true);
774 // Transfer the pending exception to the exception_oop.
775 // Also load the PC which is typically at SP + frame_size_in_bytes +_abi0(lr),
776 // but we support additional slots in the frame for parameter passing.
777 __ ld(Rexception_pc, 0, R1_SP);
778 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
779 __ li(R0, 0);
780 __ ld(Rexception_pc, _abi0(lr), Rexception_pc);
781 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
782 break;
783 case handle_exception_nofpu_id:
784 case handle_exception_id:
785 // At this point all registers MAY be live.
786 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
787 break;
788 case handle_exception_from_callee_id:
789 // At this point all registers except exception oop and exception pc are dead.
790 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
791 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
792 __ std(Rexception_pc, _abi0(lr), R1_SP);
793 __ push_frame(frame_size_in_bytes, R0);
794 break;
795 default: ShouldNotReachHere();
796 }
797
798 __ verify_not_null_oop(Rexception);
799
800 #ifdef ASSERT
801 // Check that fields in JavaThread for exception oop and issuing pc are
802 // empty before writing to them.
803 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
804 __ cmpdi(CCR0, R0, 0);
805 __ asm_assert_eq("exception oop already set");
806 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
807 __ cmpdi(CCR0, R0, 0);
808 __ asm_assert_eq("exception pc already set");
809 #endif
810
811 // Save the exception and issuing pc in the thread.
812 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
813 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
814
815 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
816 oop_maps->add_gc_map(call_offset, oop_map);
817
818 __ mtctr(R3_RET);
819
820 // Note: if nmethod has been deoptimized then regardless of
821 // whether it had a handler or not we will deoptimize
822 // by entering the deopt blob with a pending exception.
823
824 // Restore the registers that were saved at the beginning, remove
825 // the frame and jump to the exception handler.
826 switch (id) {
827 case forward_exception_id:
828 case handle_exception_nofpu_id:
829 case handle_exception_id:
830 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
831 __ bctr();
832 break;
833 case handle_exception_from_callee_id: {
834 __ pop_frame();
835 __ ld(Rexception_pc, _abi0(lr), R1_SP);
836 __ mtlr(Rexception_pc);
837 __ bctr();
838 break;
839 }
840 default: ShouldNotReachHere();
841 }
842
843 return oop_maps;
844 }
845
846 const char *Runtime1::pd_name_for_address(address entry) {
847 return "<unknown function>";
848 }
849
850 #undef __