1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2015 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 #if INCLUDE_ALL_GCS
46 #include "gc/g1/g1BarrierSet.hpp"
47 #include "gc/g1/g1CardTable.hpp"
48 #endif
49
50 // Implementation of StubAssembler
51
52 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
53 address entry_point, int number_of_arguments) {
54 set_num_rt_args(0); // Nothing on stack
55 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
56 oop_result1 != metadata_result, "registers must be different");
57
58 // Currently no stack banging. We assume that there are enough
59 // StackShadowPages (which have been banged in generate_stack_overflow_check)
60 // for the stub frame and the runtime frames.
61
62 set_last_Java_frame(R1_SP, noreg);
63
64 // ARG1 must hold thread address.
65 mr(R3_ARG1, R16_thread);
66
67 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
68
69 reset_last_Java_frame();
70
71 // Check for pending exceptions.
72 {
73 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
74 cmpdi(CCR0, R0, 0);
75
76 // This used to conditionally jump to forward_exception however it is
77 // possible if we relocate that the branch will not reach. So we must jump
78 // around so we can always reach.
79
80 Label ok;
81 beq(CCR0, ok);
82
83 // Make sure that the vm_results are cleared.
84 if (oop_result1->is_valid() || metadata_result->is_valid()) {
85 li(R0, 0);
86 if (oop_result1->is_valid()) {
87 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
88 }
89 if (metadata_result->is_valid()) {
90 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
91 }
92 }
93
94 if (frame_size() == no_frame_size) {
95 ShouldNotReachHere(); // We always have a frame size.
96 //pop_frame(); // pop the stub frame
97 //ld(R0, _abi(lr), R1_SP);
98 //mtlr(R0);
99 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
100 //mtctr(R0);
101 //bctr();
102 } else if (_stub_id == Runtime1::forward_exception_id) {
103 should_not_reach_here();
104 } else {
105 // keep stub frame for next call_RT
106 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
107 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
108 mtctr(R0);
109 bctr();
110 }
111
112 bind(ok);
113 }
114
115 // Get oop results if there are any and reset the values in the thread.
116 if (oop_result1->is_valid()) {
117 get_vm_result(oop_result1);
118 }
119 if (metadata_result->is_valid()) {
120 get_vm_result_2(metadata_result);
121 }
122
123 return (int)(return_pc - code_section()->start());
124 }
125
126
127 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
128 mr_if_needed(R4_ARG2, arg1);
129 return call_RT(oop_result1, metadata_result, entry, 1);
130 }
131
132
133 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
134 mr_if_needed(R4_ARG2, arg1);
135 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
136 return call_RT(oop_result1, metadata_result, entry, 2);
137 }
138
139
140 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
141 mr_if_needed(R4_ARG2, arg1);
142 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
143 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
144 return call_RT(oop_result1, metadata_result, entry, 3);
145 }
146
147
148 // Implementation of Runtime1
149
150 #define __ sasm->
151
152 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
153 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
154 static int frame_size_in_bytes = -1;
155
156 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
157 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
158 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
159 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
160 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
161
162 int i;
163 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
164 Register r = as_Register(i);
165 if (FrameMap::reg_needs_save(r)) {
166 int sp_offset = cpu_reg_save_offsets[i];
167 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
168 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
169 }
170 }
171
172 if (save_fpu_registers) {
173 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
174 FloatRegister r = as_FloatRegister(i);
175 int sp_offset = fpu_reg_save_offsets[i];
176 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
177 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
178 }
179 }
180
181 return oop_map;
182 }
183
184 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
185 Register ret_pc = noreg, int stack_preserve = 0) {
186 if (ret_pc == noreg) {
187 ret_pc = R0;
188 __ mflr(ret_pc);
189 }
190 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method.
191 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
192
193 // Record volatile registers as callee-save values in an OopMap so
194 // their save locations will be propagated to the caller frame's
195 // RegisterMap during StackFrameStream construction (needed for
196 // deoptimization; see compiledVFrame::create_stack_value).
197 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
198
199 int i;
200 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
201 Register r = as_Register(i);
202 if (FrameMap::reg_needs_save(r)) {
203 int sp_offset = cpu_reg_save_offsets[i];
204 __ std(r, sp_offset + STACK_BIAS, R1_SP);
205 }
206 }
207
208 if (save_fpu_registers) {
209 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
210 FloatRegister r = as_FloatRegister(i);
211 int sp_offset = fpu_reg_save_offsets[i];
212 __ stfd(r, sp_offset + STACK_BIAS, R1_SP);
213 }
214 }
215
216 return generate_oop_map(sasm, save_fpu_registers);
217 }
218
219 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
220 bool restore_fpu_registers = true) {
221 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
222 Register r = as_Register(i);
223 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
224 int sp_offset = cpu_reg_save_offsets[i];
225 __ ld(r, sp_offset + STACK_BIAS, R1_SP);
226 }
227 }
228
229 if (restore_fpu_registers) {
230 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
231 FloatRegister r = as_FloatRegister(i);
232 int sp_offset = fpu_reg_save_offsets[i];
233 __ lfd(r, sp_offset + STACK_BIAS, R1_SP);
234 }
235 }
236
237 __ pop_frame();
238 __ ld(R0, _abi(lr), R1_SP);
239 __ mtlr(R0);
240 }
241
242
243 void Runtime1::initialize_pd() {
244 int i;
245 int sp_offset = frame::abi_reg_args_size;
246
247 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
248 Register r = as_Register(i);
249 if (FrameMap::reg_needs_save(r)) {
250 cpu_reg_save_offsets[i] = sp_offset;
251 sp_offset += BytesPerWord;
252 }
253 }
254
255 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
256 fpu_reg_save_offsets[i] = sp_offset;
257 sp_offset += BytesPerWord;
258 }
259 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes);
260 }
261
262
263 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
264 // Make a frame and preserve the caller's caller-save registers.
265 OopMap* oop_map = save_live_registers(sasm);
266
267 int call_offset;
268 if (!has_argument) {
269 call_offset = __ call_RT(noreg, noreg, target);
270 } else {
271 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
272 }
273 OopMapSet* oop_maps = new OopMapSet();
274 oop_maps->add_gc_map(call_offset, oop_map);
275
276 __ should_not_reach_here();
277 return oop_maps;
278 }
279
280 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
281 int stack_parms) {
282 // Make a frame and preserve the caller's caller-save registers.
283 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
284 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
285 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
286
287 int call_offset = 0;
288 switch (stack_parms) {
289 case 3:
290 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
291 case 2:
292 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
293 case 1:
294 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
295 case 0:
296 call_offset = __ call_RT(noreg, noreg, target);
297 break;
298 default: Unimplemented(); break;
299 }
300 OopMapSet* oop_maps = new OopMapSet();
301 oop_maps->add_gc_map(call_offset, oop_map);
302
303 __ should_not_reach_here();
304 return oop_maps;
305 }
306
307
308 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
309 Register arg1, Register arg2, Register arg3) {
310 // Make a frame and preserve the caller's caller-save registers.
311 OopMap* oop_map = save_live_registers(sasm);
312
313 int call_offset;
314 if (arg1 == noreg) {
315 call_offset = __ call_RT(result, noreg, target);
316 } else if (arg2 == noreg) {
317 call_offset = __ call_RT(result, noreg, target, arg1);
318 } else if (arg3 == noreg) {
319 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
320 } else {
321 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
322 }
323 OopMapSet* oop_maps = new OopMapSet();
324 oop_maps->add_gc_map(call_offset, oop_map);
325
326 restore_live_registers(sasm, result, noreg);
327 __ blr();
328 return oop_maps;
329 }
330
331 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
332 int stack_parms, bool do_return = true) {
333 // Make a frame and preserve the caller's caller-save registers.
334 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
335 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
336 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
337
338 int call_offset = 0;
339 switch (stack_parms) {
340 case 3:
341 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
342 case 2:
343 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
344 case 1:
345 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
346 case 0:
347 call_offset = __ call_RT(result, noreg, target);
348 break;
349 default: Unimplemented(); break;
350 }
351 OopMapSet* oop_maps = new OopMapSet();
352 oop_maps->add_gc_map(call_offset, oop_map);
353
354 restore_live_registers(sasm, result, noreg);
355 if (do_return) __ blr();
356 return oop_maps;
357 }
358
359
360 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
361 // Make a frame and preserve the caller's caller-save registers.
362 OopMap* oop_map = save_live_registers(sasm);
363
364 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
365 int call_offset = __ call_RT(noreg, noreg, target);
366 OopMapSet* oop_maps = new OopMapSet();
367 oop_maps->add_gc_map(call_offset, oop_map);
368 __ cmpdi(CCR0, R3_RET, 0);
369
370 // Re-execute the patched instruction or, if the nmethod was deoptmized,
371 // return to the deoptimization handler entry that will cause re-execution
372 // of the current bytecode.
373 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
374 assert(deopt_blob != NULL, "deoptimization blob must have been created");
375
376 // Return to the deoptimization handler entry for unpacking and rexecute.
377 // If we simply returned the we'd deopt as if any call we patched had just
378 // returned.
379
380 restore_live_registers(sasm, noreg, noreg);
381 // Return if patching routine returned 0.
382 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
383
384 address stub = deopt_blob->unpack_with_reexecution();
385 //__ load_const_optimized(R0, stub);
386 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
387 __ mtctr(R0);
388 __ bctr();
389
390 return oop_maps;
391 }
392
393 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
394 OopMapSet* oop_maps = NULL;
395
396 // For better readability.
397 const bool must_gc_arguments = true;
398 const bool dont_gc_arguments = false;
399
400 // Stub code & info for the different stubs.
401 switch (id) {
402 case forward_exception_id:
403 {
404 oop_maps = generate_handle_exception(id, sasm);
405 }
406 break;
407
408 case new_instance_id:
409 case fast_new_instance_id:
410 case fast_new_instance_init_check_id:
411 {
412 if (id == new_instance_id) {
413 __ set_info("new_instance", dont_gc_arguments);
414 } else if (id == fast_new_instance_id) {
415 __ set_info("fast new_instance", dont_gc_arguments);
416 } else {
417 assert(id == fast_new_instance_init_check_id, "bad StubID");
418 __ set_info("fast new_instance init check", dont_gc_arguments);
419 }
420
421 // We don't support eden allocation.
422
423 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
424 }
425 break;
426
427 case counter_overflow_id:
428 // Bci and method are on stack.
429 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
430 break;
431
432 case new_type_array_id:
433 case new_object_array_id:
434 {
435 if (id == new_type_array_id) {
436 __ set_info("new_type_array", dont_gc_arguments);
437 } else {
438 __ set_info("new_object_array", dont_gc_arguments);
439 }
440
441 #ifdef ASSERT
442 // Assert object type is really an array of the proper kind.
443 {
444 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
445 Label ok;
446 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
447 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
448 __ cmpwi(CCR0, R0, tag);
449 __ beq(CCR0, ok);
450 __ stop("assert(is an array klass)");
451 __ should_not_reach_here();
452 __ bind(ok);
453 }
454 #endif // ASSERT
455
456 // We don't support eden allocation.
457
458 if (id == new_type_array_id) {
459 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
460 } else {
461 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
462 }
463 }
464 break;
465
466 case new_multi_array_id:
467 {
468 // R4: klass
469 // R5: rank
470 // R6: address of 1st dimension
471 __ set_info("new_multi_array", dont_gc_arguments);
472 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
473 }
474 break;
475
476 case register_finalizer_id:
477 {
478 __ set_info("register_finalizer", dont_gc_arguments);
479 // This code is called via rt_call. Hence, caller-save registers have been saved.
480 Register t = R11_scratch1;
481
482 // Load the klass and check the has finalizer flag.
483 __ load_klass(t, R3_ARG1);
484 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
485 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
486 // Return if has_finalizer bit == 0 (CR0.eq).
487 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
488
489 __ mflr(R0);
490 __ std(R0, _abi(lr), R1_SP);
491 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
492 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
493 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
494 int call_offset = __ call_RT(noreg, noreg,
495 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
496 oop_maps = new OopMapSet();
497 oop_maps->add_gc_map(call_offset, oop_map);
498
499 __ pop_frame();
500 __ ld(R0, _abi(lr), R1_SP);
501 __ mtlr(R0);
502 __ blr();
503 }
504 break;
505
506 case throw_range_check_failed_id:
507 {
508 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
509 __ std(R0, -8, R1_SP); // Pass index on stack.
510 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 1);
511 }
512 break;
513
514 case 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 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 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 handle_exception_nofpu_id:
536 case 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 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 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 __ ld(Rcaller_sp, 0, R1_SP);
558 __ push_frame_reg_args(0, R0); // dummy frame for C call
559 __ mr(Rexception_save, Rexception); // save over C call
560 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
561 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
562 __ verify_not_null_oop(Rexception_save);
563 __ mtctr(R3_RET);
564 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
565 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
566 __ mr(Rexception, Rexception_save); // restore
567 __ mtlr(Rexception_pc);
568 __ bctr();
569 }
570 break;
571
572 case throw_array_store_exception_id:
573 {
574 __ set_info("throw_array_store_exception", dont_gc_arguments);
575 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
576 }
577 break;
578
579 case throw_class_cast_exception_id:
580 {
581 __ set_info("throw_class_cast_exception", dont_gc_arguments);
582 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
583 }
584 break;
585
586 case throw_incompatible_class_change_error_id:
587 {
588 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
589 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
590 }
591 break;
592
593 case slow_subtype_check_id:
594 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
595 const Register sub_klass = R5,
596 super_klass = R4,
597 temp1_reg = R6,
598 temp2_reg = R0;
599 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
600 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
601 __ blr();
602 }
603 break;
604
605 case monitorenter_nofpu_id:
606 case monitorenter_id:
607 {
608 __ set_info("monitorenter", dont_gc_arguments);
609
610 int save_fpu_registers = (id == monitorenter_id);
611 // Make a frame and preserve the caller's caller-save registers.
612 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
613
614 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
615
616 oop_maps = new OopMapSet();
617 oop_maps->add_gc_map(call_offset, oop_map);
618
619 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
620 __ blr();
621 }
622 break;
623
624 case monitorexit_nofpu_id:
625 case monitorexit_id:
626 {
627 // note: Really a leaf routine but must setup last java sp
628 // => use call_RT for now (speed can be improved by
629 // doing last java sp setup manually).
630 __ set_info("monitorexit", dont_gc_arguments);
631
632 int save_fpu_registers = (id == monitorexit_id);
633 // Make a frame and preserve the caller's caller-save registers.
634 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
635
636 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
637
638 oop_maps = new OopMapSet();
639 oop_maps->add_gc_map(call_offset, oop_map);
640
641 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
642 __ blr();
643 }
644 break;
645
646 case deoptimize_id:
647 {
648 __ set_info("deoptimize", dont_gc_arguments);
649 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
650 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
651
652 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
653 assert(deopt_blob != NULL, "deoptimization blob must have been created");
654 address stub = deopt_blob->unpack_with_reexecution();
655 //__ load_const_optimized(R0, stub);
656 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
657 __ mtctr(R0);
658 __ bctr();
659 }
660 break;
661
662 case access_field_patching_id:
663 {
664 __ set_info("access_field_patching", dont_gc_arguments);
665 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
666 }
667 break;
668
669 case load_klass_patching_id:
670 {
671 __ set_info("load_klass_patching", dont_gc_arguments);
672 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
673 }
674 break;
675
676 case load_mirror_patching_id:
677 {
678 __ set_info("load_mirror_patching", dont_gc_arguments);
679 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
680 }
681 break;
682
683 case load_appendix_patching_id:
684 {
685 __ set_info("load_appendix_patching", dont_gc_arguments);
686 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
687 }
688 break;
689
690 case dtrace_object_alloc_id:
691 { // O0: object
692 __ unimplemented("stub dtrace_object_alloc_id");
693 __ set_info("dtrace_object_alloc", dont_gc_arguments);
694 // // We can't gc here so skip the oopmap but make sure that all
695 // // the live registers get saved.
696 // save_live_registers(sasm);
697 //
698 // __ save_thread(L7_thread_cache);
699 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
700 // relocInfo::runtime_call_type);
701 // __ delayed()->mov(I0, O0);
702 // __ restore_thread(L7_thread_cache);
703 //
704 // restore_live_registers(sasm);
705 // __ ret();
706 // __ delayed()->restore();
707 }
708 break;
709
710 #if INCLUDE_ALL_GCS
711 case g1_pre_barrier_slow_id:
712 {
713 BarrierSet* bs = Universe::heap()->barrier_set();
714 if (bs->kind() != BarrierSet::G1BarrierSet) {
715 goto unimplemented_entry;
716 }
717
718 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
719
720 // Using stack slots: pre_val (pre-pushed), spill tmp, spill tmp2.
721 const int stack_slots = 3;
722 Register pre_val = R0; // previous value of memory
723 Register tmp = R14;
724 Register tmp2 = R15;
725
726 Label refill, restart, marking_not_active;
727 int satb_q_active_byte_offset =
728 in_bytes(JavaThread::satb_mark_queue_offset() +
729 SATBMarkQueue::byte_offset_of_active());
730 int satb_q_index_byte_offset =
731 in_bytes(JavaThread::satb_mark_queue_offset() +
732 SATBMarkQueue::byte_offset_of_index());
733 int satb_q_buf_byte_offset =
734 in_bytes(JavaThread::satb_mark_queue_offset() +
735 SATBMarkQueue::byte_offset_of_buf());
736
737 // Spill
738 __ std(tmp, -16, R1_SP);
739 __ std(tmp2, -24, R1_SP);
740
741 // Is marking still active?
742 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
743 __ lwz(tmp, satb_q_active_byte_offset, R16_thread);
744 } else {
745 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
746 __ lbz(tmp, satb_q_active_byte_offset, R16_thread);
747 }
748 __ cmpdi(CCR0, tmp, 0);
749 __ beq(CCR0, marking_not_active);
750
751 __ bind(restart);
752 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
753 // size_t so ld_ptr is appropriate.
754 __ ld(tmp, satb_q_index_byte_offset, R16_thread);
755
756 // index == 0?
757 __ cmpdi(CCR0, tmp, 0);
758 __ beq(CCR0, refill);
759
760 __ ld(tmp2, satb_q_buf_byte_offset, R16_thread);
761 __ ld(pre_val, -8, R1_SP); // Load from stack.
762 __ addi(tmp, tmp, -oopSize);
763
764 __ std(tmp, satb_q_index_byte_offset, R16_thread);
765 __ stdx(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
766
767 __ bind(marking_not_active);
768 // Restore temp registers and return-from-leaf.
769 __ ld(tmp2, -24, R1_SP);
770 __ ld(tmp, -16, R1_SP);
771 __ blr();
772
773 __ bind(refill);
774 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
775 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
776 __ mflr(R0);
777 __ std(R0, _abi(lr), R1_SP);
778 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
779 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), R16_thread);
780 __ pop_frame();
781 __ ld(R0, _abi(lr), R1_SP);
782 __ mtlr(R0);
783 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
784 __ b(restart);
785 }
786 break;
787
788 case g1_post_barrier_slow_id:
789 {
790 BarrierSet* bs = Universe::heap()->barrier_set();
791 if (bs->kind() != BarrierSet::G1BarrierSet) {
792 goto unimplemented_entry;
793 }
794
795 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
796
797 // Using stack slots: spill addr, spill tmp2
798 const int stack_slots = 2;
799 Register tmp = R0;
800 Register addr = R14;
801 Register tmp2 = R15;
802 jbyte* byte_map_base = ci_card_table_address();
803
804 Label restart, refill, ret;
805
806 // Spill
807 __ std(addr, -8, R1_SP);
808 __ std(tmp2, -16, R1_SP);
809
810 __ srdi(addr, R0, CardTable::card_shift); // Addr is passed in R0.
811 __ load_const_optimized(/*cardtable*/ tmp2, byte_map_base, tmp);
812 __ add(addr, tmp2, addr);
813 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
814
815 // Return if young card.
816 __ cmpwi(CCR0, tmp, G1CardTable::g1_young_card_val());
817 __ beq(CCR0, ret);
818
819 // Return if sequential consistent value is already dirty.
820 __ membar(Assembler::StoreLoad);
821 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable]
822
823 __ cmpwi(CCR0, tmp, G1CardTable::dirty_card_val());
824 __ beq(CCR0, ret);
825
826 // Not dirty.
827
828 // First, dirty it.
829 __ li(tmp, G1CardTable::dirty_card_val());
830 __ stb(tmp, 0, addr);
831
832 int dirty_card_q_index_byte_offset =
833 in_bytes(JavaThread::dirty_card_queue_offset() +
834 DirtyCardQueue::byte_offset_of_index());
835 int dirty_card_q_buf_byte_offset =
836 in_bytes(JavaThread::dirty_card_queue_offset() +
837 DirtyCardQueue::byte_offset_of_buf());
838
839 __ bind(restart);
840
841 // Get the index into the update buffer. DirtyCardQueue::_index is
842 // a size_t so ld_ptr is appropriate here.
843 __ ld(tmp2, dirty_card_q_index_byte_offset, R16_thread);
844
845 // index == 0?
846 __ cmpdi(CCR0, tmp2, 0);
847 __ beq(CCR0, refill);
848
849 __ ld(tmp, dirty_card_q_buf_byte_offset, R16_thread);
850 __ addi(tmp2, tmp2, -oopSize);
851
852 __ std(tmp2, dirty_card_q_index_byte_offset, R16_thread);
853 __ add(tmp2, tmp, tmp2);
854 __ std(addr, 0, tmp2); // [_buf + index] := <address_of_card>
855
856 // Restore temp registers and return-from-leaf.
857 __ bind(ret);
858 __ ld(tmp2, -16, R1_SP);
859 __ ld(addr, -8, R1_SP);
860 __ blr();
861
862 __ bind(refill);
863 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord;
864 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
865 __ mflr(R0);
866 __ std(R0, _abi(lr), R1_SP);
867 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call
868 __ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), R16_thread);
869 __ pop_frame();
870 __ ld(R0, _abi(lr), R1_SP);
871 __ mtlr(R0);
872 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
873 __ b(restart);
874 }
875 break;
876 #endif // INCLUDE_ALL_GCS
877
878 case predicate_failed_trap_id:
879 {
880 __ set_info("predicate_failed_trap", dont_gc_arguments);
881 OopMap* oop_map = save_live_registers(sasm);
882
883 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
884
885 oop_maps = new OopMapSet();
886 oop_maps->add_gc_map(call_offset, oop_map);
887
888 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
889 assert(deopt_blob != NULL, "deoptimization blob must have been created");
890 restore_live_registers(sasm, noreg, noreg);
891
892 address stub = deopt_blob->unpack_with_reexecution();
893 //__ load_const_optimized(R0, stub);
894 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
895 __ mtctr(R0);
896 __ bctr();
897 }
898 break;
899
900 default:
901 unimplemented_entry:
902 {
903 __ set_info("unimplemented entry", dont_gc_arguments);
904 __ mflr(R0);
905 __ std(R0, _abi(lr), R1_SP);
906 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
907 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
908 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
909
910 __ load_const_optimized(R4_ARG2, (int)id);
911 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
912
913 oop_maps = new OopMapSet();
914 oop_maps->add_gc_map(call_offset, oop_map);
915 __ should_not_reach_here();
916 }
917 break;
918 }
919 return oop_maps;
920 }
921
922
923 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
924 __ block_comment("generate_handle_exception");
925
926 // Save registers, if required.
927 OopMapSet* oop_maps = new OopMapSet();
928 OopMap* oop_map = NULL;
929 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
930 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
931
932 switch (id) {
933 case forward_exception_id:
934 // We're handling an exception in the context of a compiled frame.
935 // The registers have been saved in the standard places. Perform
936 // an exception lookup in the caller and dispatch to the handler
937 // if found. Otherwise unwind and dispatch to the callers
938 // exception handler.
939 oop_map = generate_oop_map(sasm, true);
940 // Transfer the pending exception to the exception_oop.
941 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
942 // but we support additional slots in the frame for parameter passing.
943 __ ld(Rexception_pc, 0, R1_SP);
944 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
945 __ li(R0, 0);
946 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
947 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
948 break;
949 case handle_exception_nofpu_id:
950 case handle_exception_id:
951 // At this point all registers MAY be live.
952 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
953 break;
954 case handle_exception_from_callee_id:
955 // At this point all registers except exception oop and exception pc are dead.
956 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
957 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
958 __ std(Rexception_pc, _abi(lr), R1_SP);
959 __ push_frame(frame_size_in_bytes, R0);
960 break;
961 default: ShouldNotReachHere();
962 }
963
964 __ verify_not_null_oop(Rexception);
965
966 #ifdef ASSERT
967 // Check that fields in JavaThread for exception oop and issuing pc are
968 // empty before writing to them.
969 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
970 __ cmpdi(CCR0, R0, 0);
971 __ asm_assert_eq("exception oop already set", 0x963);
972 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
973 __ cmpdi(CCR0, R0, 0);
974 __ asm_assert_eq("exception pc already set", 0x962);
975 #endif
976
977 // Save the exception and issuing pc in the thread.
978 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
979 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
980
981 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
982 oop_maps->add_gc_map(call_offset, oop_map);
983
984 __ mtctr(R3_RET);
985
986 // Note: if nmethod has been deoptimized then regardless of
987 // whether it had a handler or not we will deoptimize
988 // by entering the deopt blob with a pending exception.
989
990 // Restore the registers that were saved at the beginning, remove
991 // the frame and jump to the exception handler.
992 switch (id) {
993 case forward_exception_id:
994 case handle_exception_nofpu_id:
995 case handle_exception_id:
996 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
997 __ bctr();
998 break;
999 case handle_exception_from_callee_id: {
1000 __ pop_frame();
1001 __ ld(Rexception_pc, _abi(lr), R1_SP);
1002 __ mtlr(Rexception_pc);
1003 __ bctr();
1004 break;
1005 }
1006 default: ShouldNotReachHere();
1007 }
1008
1009 return oop_maps;
1010 }
1011
1012 const char *Runtime1::pd_name_for_address(address entry) {
1013 return "<unknown function>";
1014 }
1015
1016 #undef __