1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2018 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "ci/ciUtilities.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "nativeInst_ppc.hpp"
35 #include "oops/compiledICHolder.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "register_ppc.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/signature.hpp"
41 #include "runtime/vframeArray.hpp"
42 #include "utilities/align.hpp"
43 #include "utilities/macros.hpp"
44 #include "vmreg_ppc.inline.hpp"
45
46 // Implementation of StubAssembler
47
48 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
49 address entry_point, int number_of_arguments) {
50 set_num_rt_args(0); // Nothing on stack
51 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
52 oop_result1 != metadata_result, "registers must be different");
53
54 // Currently no stack banging. We assume that there are enough
55 // StackShadowPages (which have been banged in generate_stack_overflow_check)
56 // for the stub frame and the runtime frames.
57
58 set_last_Java_frame(R1_SP, noreg);
59
60 // ARG1 must hold thread address.
61 mr(R3_ARG1, R16_thread);
62
63 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
64
65 reset_last_Java_frame();
66
67 // Check for pending exceptions.
68 {
69 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
70 cmpdi(CCR0, R0, 0);
71
72 // This used to conditionally jump to forward_exception however it is
73 // possible if we relocate that the branch will not reach. So we must jump
74 // around so we can always reach.
75
76 Label ok;
77 beq(CCR0, ok);
78
79 // Make sure that the vm_results are cleared.
80 if (oop_result1->is_valid() || metadata_result->is_valid()) {
81 li(R0, 0);
82 if (oop_result1->is_valid()) {
83 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
84 }
85 if (metadata_result->is_valid()) {
86 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
87 }
88 }
89
90 if (frame_size() == no_frame_size) {
91 ShouldNotReachHere(); // We always have a frame size.
92 //pop_frame(); // pop the stub frame
93 //ld(R0, _abi(lr), R1_SP);
94 //mtlr(R0);
95 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
96 //mtctr(R0);
97 //bctr();
98 } else if (_stub_id == Runtime1::forward_exception_id) {
99 should_not_reach_here();
100 } else {
101 // keep stub frame for next call_RT
102 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
103 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
104 mtctr(R0);
105 bctr();
106 }
107
108 bind(ok);
109 }
110
111 // Get oop results if there are any and reset the values in the thread.
112 if (oop_result1->is_valid()) {
113 get_vm_result(oop_result1);
114 }
115 if (metadata_result->is_valid()) {
116 get_vm_result_2(metadata_result);
117 }
118
119 return (int)(return_pc - code_section()->start());
120 }
121
122
123 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
124 mr_if_needed(R4_ARG2, arg1);
125 return call_RT(oop_result1, metadata_result, entry, 1);
126 }
127
128
129 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
130 mr_if_needed(R4_ARG2, arg1);
131 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
132 return call_RT(oop_result1, metadata_result, entry, 2);
133 }
134
135
136 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
137 mr_if_needed(R4_ARG2, arg1);
138 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
139 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
140 return call_RT(oop_result1, metadata_result, entry, 3);
141 }
142
143
144 // Implementation of Runtime1
145
146 #define __ sasm->
147
148 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
149 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
150 static int frame_size_in_bytes = -1;
151
152 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
153 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
154 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
155 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
156 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
157
158 int i;
159 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
160 Register r = as_Register(i);
161 if (FrameMap::reg_needs_save(r)) {
162 int sp_offset = cpu_reg_save_offsets[i];
163 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
164 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
165 }
166 }
167
168 if (save_fpu_registers) {
169 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
170 FloatRegister r = as_FloatRegister(i);
171 int sp_offset = fpu_reg_save_offsets[i];
172 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
173 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
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, _abi(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 + STACK_BIAS, 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 + STACK_BIAS, 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 + STACK_BIAS, 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 + STACK_BIAS, R1_SP);
230 }
231 }
232
233 __ pop_frame();
234 __ ld(R0, _abi(lr), R1_SP);
235 __ mtlr(R0);
236 }
237
238
239 void Runtime1::initialize_pd() {
240 int i;
241 int sp_offset = frame::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
259 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
260 // Make a frame and preserve the caller's caller-save registers.
261 OopMap* oop_map = save_live_registers(sasm);
262
263 int call_offset;
264 if (!has_argument) {
265 call_offset = __ call_RT(noreg, noreg, target);
266 } else {
267 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
268 }
269 OopMapSet* oop_maps = new OopMapSet();
270 oop_maps->add_gc_map(call_offset, oop_map);
271
272 __ should_not_reach_here();
273 return oop_maps;
274 }
275
276 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
277 int stack_parms) {
278 // Make a frame and preserve the caller's caller-save registers.
279 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
280 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
281 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
282
283 int call_offset = 0;
284 switch (stack_parms) {
285 case 3:
286 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
287 case 2:
288 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
289 case 1:
290 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
291 case 0:
292 call_offset = __ call_RT(noreg, noreg, target);
293 break;
294 default: Unimplemented(); break;
295 }
296 OopMapSet* oop_maps = new OopMapSet();
297 oop_maps->add_gc_map(call_offset, oop_map);
298
299 __ should_not_reach_here();
300 return oop_maps;
301 }
302
303
304 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
305 Register arg1, Register arg2, Register arg3) {
306 // Make a frame and preserve the caller's caller-save registers.
307 OopMap* oop_map = save_live_registers(sasm);
308
309 int call_offset;
310 if (arg1 == noreg) {
311 call_offset = __ call_RT(result, noreg, target);
312 } else if (arg2 == noreg) {
313 call_offset = __ call_RT(result, noreg, target, arg1);
314 } else if (arg3 == noreg) {
315 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
316 } else {
317 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
318 }
319 OopMapSet* oop_maps = new OopMapSet();
320 oop_maps->add_gc_map(call_offset, oop_map);
321
322 restore_live_registers(sasm, result, noreg);
323 __ blr();
324 return oop_maps;
325 }
326
327 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
328 int stack_parms, bool do_return = true) {
329 // Make a frame and preserve the caller's caller-save registers.
330 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
331 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
332 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
333
334 int call_offset = 0;
335 switch (stack_parms) {
336 case 3:
337 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
338 case 2:
339 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
340 case 1:
341 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
342 case 0:
343 call_offset = __ call_RT(result, noreg, target);
344 break;
345 default: Unimplemented(); break;
346 }
347 OopMapSet* oop_maps = new OopMapSet();
348 oop_maps->add_gc_map(call_offset, oop_map);
349
350 restore_live_registers(sasm, result, noreg);
351 if (do_return) __ blr();
352 return oop_maps;
353 }
354
355
356 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
357 // Make a frame and preserve the caller's caller-save registers.
358 OopMap* oop_map = save_live_registers(sasm);
359
360 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
361 int call_offset = __ call_RT(noreg, noreg, target);
362 OopMapSet* oop_maps = new OopMapSet();
363 oop_maps->add_gc_map(call_offset, oop_map);
364 __ cmpdi(CCR0, R3_RET, 0);
365
366 // Re-execute the patched instruction or, if the nmethod was deoptmized,
367 // return to the deoptimization handler entry that will cause re-execution
368 // of the current bytecode.
369 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
370 assert(deopt_blob != NULL, "deoptimization blob must have been created");
371
372 // Return to the deoptimization handler entry for unpacking and rexecute.
373 // If we simply returned the we'd deopt as if any call we patched had just
374 // returned.
375
376 restore_live_registers(sasm, noreg, noreg);
377 // Return if patching routine returned 0.
378 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
379
380 address stub = deopt_blob->unpack_with_reexecution();
381 //__ load_const_optimized(R0, stub);
382 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
383 __ mtctr(R0);
384 __ bctr();
385
386 return oop_maps;
387 }
388
389 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
390 OopMapSet* oop_maps = NULL;
391
392 // For better readability.
393 const bool must_gc_arguments = true;
394 const bool dont_gc_arguments = false;
395
396 // Stub code & info for the different stubs.
397 switch (id) {
398 case forward_exception_id:
399 {
400 oop_maps = generate_handle_exception(id, sasm);
401 }
402 break;
403
404 case new_instance_id:
405 case fast_new_instance_id:
406 case fast_new_instance_init_check_id:
407 {
408 if (id == new_instance_id) {
409 __ set_info("new_instance", dont_gc_arguments);
410 } else if (id == fast_new_instance_id) {
411 __ set_info("fast new_instance", dont_gc_arguments);
412 } else {
413 assert(id == fast_new_instance_init_check_id, "bad StubID");
414 __ set_info("fast new_instance init check", dont_gc_arguments);
415 }
416
417 // We don't support eden allocation.
418
419 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
420 }
421 break;
422
423 case counter_overflow_id:
424 // Bci and method are on stack.
425 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
426 break;
427
428 case new_type_array_id:
429 case new_object_array_id:
430 {
431 if (id == new_type_array_id) {
432 __ set_info("new_type_array", dont_gc_arguments);
433 } else {
434 __ set_info("new_object_array", dont_gc_arguments);
435 }
436
437 #ifdef ASSERT
438 // Assert object type is really an array of the proper kind.
439 {
440 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
441 Label ok;
442 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
443 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
444 __ cmpwi(CCR0, R0, tag);
445 __ beq(CCR0, ok);
446 __ stop("assert(is an array klass)");
447 __ should_not_reach_here();
448 __ bind(ok);
449 }
450 #endif // ASSERT
451
452 // We don't support eden allocation.
453
454 if (id == new_type_array_id) {
455 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
456 } else {
457 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
458 }
459 }
460 break;
461
462 case new_multi_array_id:
463 {
464 // R4: klass
465 // R5: rank
466 // R6: address of 1st dimension
467 __ set_info("new_multi_array", dont_gc_arguments);
468 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
469 }
470 break;
471
472 case register_finalizer_id:
473 {
474 __ set_info("register_finalizer", dont_gc_arguments);
475 // This code is called via rt_call. Hence, caller-save registers have been saved.
476 Register t = R11_scratch1;
477
478 // Load the klass and check the has finalizer flag.
479 __ load_klass(t, R3_ARG1);
480 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
481 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
482 // Return if has_finalizer bit == 0 (CR0.eq).
483 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
484
485 __ mflr(R0);
486 __ std(R0, _abi(lr), R1_SP);
487 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
488 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
489 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
490 int call_offset = __ call_RT(noreg, noreg,
491 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
492 oop_maps = new OopMapSet();
493 oop_maps->add_gc_map(call_offset, oop_map);
494
495 __ pop_frame();
496 __ ld(R0, _abi(lr), R1_SP);
497 __ mtlr(R0);
498 __ blr();
499 }
500 break;
501
502 case throw_range_check_failed_id:
503 {
504 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
505 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
506 }
507 break;
508
509 case throw_index_exception_id:
510 {
511 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
512 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
513 }
514 break;
515
516 case throw_div0_exception_id:
517 {
518 __ set_info("throw_div0_exception", dont_gc_arguments);
519 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
520 }
521 break;
522
523 case throw_null_pointer_exception_id:
524 {
525 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
526 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
527 }
528 break;
529
530 case handle_exception_nofpu_id:
531 case handle_exception_id:
532 {
533 __ set_info("handle_exception", dont_gc_arguments);
534 oop_maps = generate_handle_exception(id, sasm);
535 }
536 break;
537
538 case handle_exception_from_callee_id:
539 {
540 __ set_info("handle_exception_from_callee", dont_gc_arguments);
541 oop_maps = generate_handle_exception(id, sasm);
542 }
543 break;
544
545 case unwind_exception_id:
546 {
547 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
548 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
549 Rexception_save = R31, Rcaller_sp = R30;
550 __ set_info("unwind_exception", dont_gc_arguments);
551
552 __ ld(Rcaller_sp, 0, R1_SP);
553 __ push_frame_reg_args(0, R0); // dummy frame for C call
554 __ mr(Rexception_save, Rexception); // save over C call
555 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
556 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
557 __ verify_not_null_oop(Rexception_save);
558 __ mtctr(R3_RET);
559 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
560 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
561 __ mr(Rexception, Rexception_save); // restore
562 __ mtlr(Rexception_pc);
563 __ bctr();
564 }
565 break;
566
567 case throw_array_store_exception_id:
568 {
569 __ set_info("throw_array_store_exception", dont_gc_arguments);
570 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
571 }
572 break;
573
574 case throw_class_cast_exception_id:
575 {
576 __ set_info("throw_class_cast_exception", dont_gc_arguments);
577 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
578 }
579 break;
580
581 case throw_incompatible_class_change_error_id:
582 {
583 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
584 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
585 }
586 break;
587
588 case slow_subtype_check_id:
589 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
590 const Register sub_klass = R5,
591 super_klass = R4,
592 temp1_reg = R6,
593 temp2_reg = R0;
594 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
595 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
596 __ blr();
597 }
598 break;
599
600 case monitorenter_nofpu_id:
601 case monitorenter_id:
602 {
603 __ set_info("monitorenter", dont_gc_arguments);
604
605 int save_fpu_registers = (id == monitorenter_id);
606 // Make a frame and preserve the caller's caller-save registers.
607 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
608
609 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
610
611 oop_maps = new OopMapSet();
612 oop_maps->add_gc_map(call_offset, oop_map);
613
614 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
615 __ blr();
616 }
617 break;
618
619 case monitorexit_nofpu_id:
620 case monitorexit_id:
621 {
622 // note: Really a leaf routine but must setup last java sp
623 // => use call_RT for now (speed can be improved by
624 // doing last java sp setup manually).
625 __ set_info("monitorexit", dont_gc_arguments);
626
627 int save_fpu_registers = (id == monitorexit_id);
628 // Make a frame and preserve the caller's caller-save registers.
629 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
630
631 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
632
633 oop_maps = new OopMapSet();
634 oop_maps->add_gc_map(call_offset, oop_map);
635
636 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
637 __ blr();
638 }
639 break;
640
641 case deoptimize_id:
642 {
643 __ set_info("deoptimize", dont_gc_arguments);
644 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
645 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
646
647 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
648 assert(deopt_blob != NULL, "deoptimization blob must have been created");
649 address stub = deopt_blob->unpack_with_reexecution();
650 //__ load_const_optimized(R0, stub);
651 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
652 __ mtctr(R0);
653 __ bctr();
654 }
655 break;
656
657 case access_field_patching_id:
658 {
659 __ set_info("access_field_patching", dont_gc_arguments);
660 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
661 }
662 break;
663
664 case load_klass_patching_id:
665 {
666 __ set_info("load_klass_patching", dont_gc_arguments);
667 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
668 }
669 break;
670
671 case load_mirror_patching_id:
672 {
673 __ set_info("load_mirror_patching", dont_gc_arguments);
674 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
675 }
676 break;
677
678 case load_appendix_patching_id:
679 {
680 __ set_info("load_appendix_patching", dont_gc_arguments);
681 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
682 }
683 break;
684
685 case dtrace_object_alloc_id:
686 { // O0: object
687 __ unimplemented("stub dtrace_object_alloc_id");
688 __ set_info("dtrace_object_alloc", dont_gc_arguments);
689 // // We can't gc here so skip the oopmap but make sure that all
690 // // the live registers get saved.
691 // save_live_registers(sasm);
692 //
693 // __ save_thread(L7_thread_cache);
694 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
695 // relocInfo::runtime_call_type);
696 // __ delayed()->mov(I0, O0);
697 // __ restore_thread(L7_thread_cache);
698 //
699 // restore_live_registers(sasm);
700 // __ ret();
701 // __ delayed()->restore();
702 }
703 break;
704
705 case predicate_failed_trap_id:
706 {
707 __ set_info("predicate_failed_trap", dont_gc_arguments);
708 OopMap* oop_map = save_live_registers(sasm);
709
710 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
711
712 oop_maps = new OopMapSet();
713 oop_maps->add_gc_map(call_offset, oop_map);
714
715 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
716 assert(deopt_blob != NULL, "deoptimization blob must have been created");
717 restore_live_registers(sasm, noreg, noreg);
718
719 address stub = deopt_blob->unpack_with_reexecution();
720 //__ load_const_optimized(R0, stub);
721 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
722 __ mtctr(R0);
723 __ bctr();
724 }
725 break;
726
727 default:
728 {
729 __ set_info("unimplemented entry", dont_gc_arguments);
730 __ mflr(R0);
731 __ std(R0, _abi(lr), R1_SP);
732 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
733 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
734 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
735
736 __ load_const_optimized(R4_ARG2, (int)id);
737 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
738
739 oop_maps = new OopMapSet();
740 oop_maps->add_gc_map(call_offset, oop_map);
741 __ should_not_reach_here();
742 }
743 break;
744 }
745 return oop_maps;
746 }
747
748
749 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
750 __ block_comment("generate_handle_exception");
751
752 // Save registers, if required.
753 OopMapSet* oop_maps = new OopMapSet();
754 OopMap* oop_map = NULL;
755 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
756 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
757
758 switch (id) {
759 case forward_exception_id:
760 // We're handling an exception in the context of a compiled frame.
761 // The registers have been saved in the standard places. Perform
762 // an exception lookup in the caller and dispatch to the handler
763 // if found. Otherwise unwind and dispatch to the callers
764 // exception handler.
765 oop_map = generate_oop_map(sasm, true);
766 // Transfer the pending exception to the exception_oop.
767 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
768 // but we support additional slots in the frame for parameter passing.
769 __ ld(Rexception_pc, 0, R1_SP);
770 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
771 __ li(R0, 0);
772 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
773 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
774 break;
775 case handle_exception_nofpu_id:
776 case handle_exception_id:
777 // At this point all registers MAY be live.
778 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
779 break;
780 case handle_exception_from_callee_id:
781 // At this point all registers except exception oop and exception pc are dead.
782 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
783 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
784 __ std(Rexception_pc, _abi(lr), R1_SP);
785 __ push_frame(frame_size_in_bytes, R0);
786 break;
787 default: ShouldNotReachHere();
788 }
789
790 __ verify_not_null_oop(Rexception);
791
792 #ifdef ASSERT
793 // Check that fields in JavaThread for exception oop and issuing pc are
794 // empty before writing to them.
795 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
796 __ cmpdi(CCR0, R0, 0);
797 __ asm_assert_eq("exception oop already set", 0x963);
798 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
799 __ cmpdi(CCR0, R0, 0);
800 __ asm_assert_eq("exception pc already set", 0x962);
801 #endif
802
803 // Save the exception and issuing pc in the thread.
804 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
805 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
806
807 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
808 oop_maps->add_gc_map(call_offset, oop_map);
809
810 __ mtctr(R3_RET);
811
812 // Note: if nmethod has been deoptimized then regardless of
813 // whether it had a handler or not we will deoptimize
814 // by entering the deopt blob with a pending exception.
815
816 // Restore the registers that were saved at the beginning, remove
817 // the frame and jump to the exception handler.
818 switch (id) {
819 case forward_exception_id:
820 case handle_exception_nofpu_id:
821 case handle_exception_id:
822 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
823 __ bctr();
824 break;
825 case handle_exception_from_callee_id: {
826 __ pop_frame();
827 __ ld(Rexception_pc, _abi(lr), R1_SP);
828 __ mtlr(Rexception_pc);
829 __ bctr();
830 break;
831 }
832 default: ShouldNotReachHere();
833 }
834
835 return oop_maps;
836 }
837
838 const char *Runtime1::pd_name_for_address(address entry) {
839 return "<unknown function>";
840 }
841
842 #undef __