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 "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 "gc/shared/cardTable.hpp"
33 #include "gc/shared/cardTableBarrierSet.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "nativeInst_ppc.hpp"
36 #include "oops/compiledICHolder.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 "vmreg_ppc.inline.hpp"
46
47 // Implementation of StubAssembler
48
49 int StubAssembler::call_RT(Register oop_result1, Register metadata_result,
50 address entry_point, int number_of_arguments) {
51 set_num_rt_args(0); // Nothing on stack
52 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) ||
53 oop_result1 != metadata_result, "registers must be different");
54
55 // Currently no stack banging. We assume that there are enough
56 // StackShadowPages (which have been banged in generate_stack_overflow_check)
57 // for the stub frame and the runtime frames.
58
59 set_last_Java_frame(R1_SP, noreg);
60
61 // ARG1 must hold thread address.
62 mr(R3_ARG1, R16_thread);
63
64 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0);
65
66 reset_last_Java_frame();
67
68 // Check for pending exceptions.
69 {
70 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread);
71 cmpdi(CCR0, R0, 0);
72
73 // This used to conditionally jump to forward_exception however it is
74 // possible if we relocate that the branch will not reach. So we must jump
75 // around so we can always reach.
76
77 Label ok;
78 beq(CCR0, ok);
79
80 // Make sure that the vm_results are cleared.
81 if (oop_result1->is_valid() || metadata_result->is_valid()) {
82 li(R0, 0);
83 if (oop_result1->is_valid()) {
84 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread);
85 }
86 if (metadata_result->is_valid()) {
87 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread);
88 }
89 }
90
91 if (frame_size() == no_frame_size) {
92 ShouldNotReachHere(); // We always have a frame size.
93 //pop_frame(); // pop the stub frame
94 //ld(R0, _abi(lr), R1_SP);
95 //mtlr(R0);
96 //load_const_optimized(R0, StubRoutines::forward_exception_entry());
97 //mtctr(R0);
98 //bctr();
99 } else if (_stub_id == Runtime1::forward_exception_id) {
100 should_not_reach_here();
101 } else {
102 // keep stub frame for next call_RT
103 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id));
104 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id)));
105 mtctr(R0);
106 bctr();
107 }
108
109 bind(ok);
110 }
111
112 // Get oop results if there are any and reset the values in the thread.
113 if (oop_result1->is_valid()) {
114 get_vm_result(oop_result1);
115 }
116 if (metadata_result->is_valid()) {
117 get_vm_result_2(metadata_result);
118 }
119
120 return (int)(return_pc - code_section()->start());
121 }
122
123
124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
125 mr_if_needed(R4_ARG2, arg1);
126 return call_RT(oop_result1, metadata_result, entry, 1);
127 }
128
129
130 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
131 mr_if_needed(R4_ARG2, arg1);
132 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
133 return call_RT(oop_result1, metadata_result, entry, 2);
134 }
135
136
137 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
138 mr_if_needed(R4_ARG2, arg1);
139 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument");
140 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument");
141 return call_RT(oop_result1, metadata_result, entry, 3);
142 }
143
144
145 // Implementation of Runtime1
146
147 #define __ sasm->
148
149 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
150 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
151 static int frame_size_in_bytes = -1;
152
153 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
154 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init");
155 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
156 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
157 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
158
159 int i;
160 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
161 Register r = as_Register(i);
162 if (FrameMap::reg_needs_save(r)) {
163 int sp_offset = cpu_reg_save_offsets[i];
164 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
165 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
166 }
167 }
168
169 if (save_fpu_registers) {
170 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
171 FloatRegister r = as_FloatRegister(i);
172 int sp_offset = fpu_reg_save_offsets[i];
173 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg());
174 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next());
175 }
176 }
177
178 return oop_map;
179 }
180
181 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true,
182 Register ret_pc = noreg, int stack_preserve = 0) {
183 if (ret_pc == noreg) {
184 ret_pc = R0;
185 __ mflr(ret_pc);
186 }
187 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method.
188 __ push_frame(frame_size_in_bytes + stack_preserve, R0);
189
190 // Record volatile registers as callee-save values in an OopMap so
191 // their save locations will be propagated to the caller frame's
192 // RegisterMap during StackFrameStream construction (needed for
193 // deoptimization; see compiledVFrame::create_stack_value).
194 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)).
195
196 int i;
197 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
198 Register r = as_Register(i);
199 if (FrameMap::reg_needs_save(r)) {
200 int sp_offset = cpu_reg_save_offsets[i];
201 __ std(r, sp_offset + STACK_BIAS, R1_SP);
202 }
203 }
204
205 if (save_fpu_registers) {
206 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
207 FloatRegister r = as_FloatRegister(i);
208 int sp_offset = fpu_reg_save_offsets[i];
209 __ stfd(r, sp_offset + STACK_BIAS, R1_SP);
210 }
211 }
212
213 return generate_oop_map(sasm, save_fpu_registers);
214 }
215
216 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2,
217 bool restore_fpu_registers = true) {
218 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
219 Register r = as_Register(i);
220 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) {
221 int sp_offset = cpu_reg_save_offsets[i];
222 __ ld(r, sp_offset + STACK_BIAS, R1_SP);
223 }
224 }
225
226 if (restore_fpu_registers) {
227 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
228 FloatRegister r = as_FloatRegister(i);
229 int sp_offset = fpu_reg_save_offsets[i];
230 __ lfd(r, sp_offset + STACK_BIAS, R1_SP);
231 }
232 }
233
234 __ pop_frame();
235 __ ld(R0, _abi(lr), R1_SP);
236 __ mtlr(R0);
237 }
238
239
240 void Runtime1::initialize_pd() {
241 int i;
242 int sp_offset = frame::abi_reg_args_size;
243
244 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
245 Register r = as_Register(i);
246 if (FrameMap::reg_needs_save(r)) {
247 cpu_reg_save_offsets[i] = sp_offset;
248 sp_offset += BytesPerWord;
249 }
250 }
251
252 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
253 fpu_reg_save_offsets[i] = sp_offset;
254 sp_offset += BytesPerWord;
255 }
256 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes);
257 }
258
259
260 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
261 // Make a frame and preserve the caller's caller-save registers.
262 OopMap* oop_map = save_live_registers(sasm);
263
264 int call_offset;
265 if (!has_argument) {
266 call_offset = __ call_RT(noreg, noreg, target);
267 } else {
268 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2);
269 }
270 OopMapSet* oop_maps = new OopMapSet();
271 oop_maps->add_gc_map(call_offset, oop_map);
272
273 __ should_not_reach_here();
274 return oop_maps;
275 }
276
277 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target,
278 int stack_parms) {
279 // Make a frame and preserve the caller's caller-save registers.
280 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
281 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
282 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
283
284 int call_offset = 0;
285 switch (stack_parms) {
286 case 3:
287 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
288 case 2:
289 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
290 case 1:
291 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
292 case 0:
293 call_offset = __ call_RT(noreg, noreg, target);
294 break;
295 default: Unimplemented(); break;
296 }
297 OopMapSet* oop_maps = new OopMapSet();
298 oop_maps->add_gc_map(call_offset, oop_map);
299
300 __ should_not_reach_here();
301 return oop_maps;
302 }
303
304
305 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
306 Register arg1, Register arg2, Register arg3) {
307 // Make a frame and preserve the caller's caller-save registers.
308 OopMap* oop_map = save_live_registers(sasm);
309
310 int call_offset;
311 if (arg1 == noreg) {
312 call_offset = __ call_RT(result, noreg, target);
313 } else if (arg2 == noreg) {
314 call_offset = __ call_RT(result, noreg, target, arg1);
315 } else if (arg3 == noreg) {
316 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
317 } else {
318 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
319 }
320 OopMapSet* oop_maps = new OopMapSet();
321 oop_maps->add_gc_map(call_offset, oop_map);
322
323 restore_live_registers(sasm, result, noreg);
324 __ blr();
325 return oop_maps;
326 }
327
328 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target,
329 int stack_parms, bool do_return = true) {
330 // Make a frame and preserve the caller's caller-save registers.
331 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes);
332 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord);
333 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes);
334
335 int call_offset = 0;
336 switch (stack_parms) {
337 case 3:
338 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP);
339 case 2:
340 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP);
341 case 1:
342 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP);
343 case 0:
344 call_offset = __ call_RT(result, noreg, target);
345 break;
346 default: Unimplemented(); break;
347 }
348 OopMapSet* oop_maps = new OopMapSet();
349 oop_maps->add_gc_map(call_offset, oop_map);
350
351 restore_live_registers(sasm, result, noreg);
352 if (do_return) __ blr();
353 return oop_maps;
354 }
355
356
357 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
358 // Make a frame and preserve the caller's caller-save registers.
359 OopMap* oop_map = save_live_registers(sasm);
360
361 // Call the runtime patching routine, returns non-zero if nmethod got deopted.
362 int call_offset = __ call_RT(noreg, noreg, target);
363 OopMapSet* oop_maps = new OopMapSet();
364 oop_maps->add_gc_map(call_offset, oop_map);
365 __ cmpdi(CCR0, R3_RET, 0);
366
367 // Re-execute the patched instruction or, if the nmethod was deoptmized,
368 // return to the deoptimization handler entry that will cause re-execution
369 // of the current bytecode.
370 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
371 assert(deopt_blob != NULL, "deoptimization blob must have been created");
372
373 // Return to the deoptimization handler entry for unpacking and rexecute.
374 // If we simply returned the we'd deopt as if any call we patched had just
375 // returned.
376
377 restore_live_registers(sasm, noreg, noreg);
378 // Return if patching routine returned 0.
379 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
380
381 address stub = deopt_blob->unpack_with_reexecution();
382 //__ load_const_optimized(R0, stub);
383 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
384 __ mtctr(R0);
385 __ bctr();
386
387 return oop_maps;
388 }
389
390 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
391 OopMapSet* oop_maps = NULL;
392
393 // For better readability.
394 const bool must_gc_arguments = true;
395 const bool dont_gc_arguments = false;
396
397 // Stub code & info for the different stubs.
398 switch (id) {
399 case forward_exception_id:
400 {
401 oop_maps = generate_handle_exception(id, sasm);
402 }
403 break;
404
405 case new_instance_id:
406 case fast_new_instance_id:
407 case fast_new_instance_init_check_id:
408 {
409 if (id == new_instance_id) {
410 __ set_info("new_instance", dont_gc_arguments);
411 } else if (id == fast_new_instance_id) {
412 __ set_info("fast new_instance", dont_gc_arguments);
413 } else {
414 assert(id == fast_new_instance_init_check_id, "bad StubID");
415 __ set_info("fast new_instance init check", dont_gc_arguments);
416 }
417
418 // We don't support eden allocation.
419
420 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2);
421 }
422 break;
423
424 case counter_overflow_id:
425 // Bci and method are on stack.
426 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2);
427 break;
428
429 case new_type_array_id:
430 case new_object_array_id:
431 {
432 if (id == new_type_array_id) {
433 __ set_info("new_type_array", dont_gc_arguments);
434 } else {
435 __ set_info("new_object_array", dont_gc_arguments);
436 }
437
438 #ifdef ASSERT
439 // Assert object type is really an array of the proper kind.
440 {
441 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value;
442 Label ok;
443 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2);
444 __ srawi(R0, R0, Klass::_lh_array_tag_shift);
445 __ cmpwi(CCR0, R0, tag);
446 __ beq(CCR0, ok);
447 __ stop("assert(is an array klass)");
448 __ should_not_reach_here();
449 __ bind(ok);
450 }
451 #endif // ASSERT
452
453 // We don't support eden allocation.
454
455 if (id == new_type_array_id) {
456 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3);
457 } else {
458 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3);
459 }
460 }
461 break;
462
463 case new_multi_array_id:
464 {
465 // R4: klass
466 // R5: rank
467 // R6: address of 1st dimension
468 __ set_info("new_multi_array", dont_gc_arguments);
469 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4);
470 }
471 break;
472
473 case register_finalizer_id:
474 {
475 __ set_info("register_finalizer", dont_gc_arguments);
476 // This code is called via rt_call. Hence, caller-save registers have been saved.
477 Register t = R11_scratch1;
478
479 // Load the klass and check the has finalizer flag.
480 __ load_klass(t, R3_ARG1);
481 __ lwz(t, in_bytes(Klass::access_flags_offset()), t);
482 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER));
483 // Return if has_finalizer bit == 0 (CR0.eq).
484 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn);
485
486 __ mflr(R0);
487 __ std(R0, _abi(lr), R1_SP);
488 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs).
489 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
490 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
491 int call_offset = __ call_RT(noreg, noreg,
492 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1);
493 oop_maps = new OopMapSet();
494 oop_maps->add_gc_map(call_offset, oop_map);
495
496 __ pop_frame();
497 __ ld(R0, _abi(lr), R1_SP);
498 __ mtlr(R0);
499 __ blr();
500 }
501 break;
502
503 case throw_range_check_failed_id:
504 {
505 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded.
506 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2);
507 }
508 break;
509
510 case throw_index_exception_id:
511 {
512 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded.
513 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
514 }
515 break;
516
517 case throw_div0_exception_id:
518 {
519 __ set_info("throw_div0_exception", dont_gc_arguments);
520 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
521 }
522 break;
523
524 case throw_null_pointer_exception_id:
525 {
526 __ set_info("throw_null_pointer_exception", dont_gc_arguments);
527 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
528 }
529 break;
530
531 case handle_exception_nofpu_id:
532 case handle_exception_id:
533 {
534 __ set_info("handle_exception", dont_gc_arguments);
535 oop_maps = generate_handle_exception(id, sasm);
536 }
537 break;
538
539 case handle_exception_from_callee_id:
540 {
541 __ set_info("handle_exception_from_callee", dont_gc_arguments);
542 oop_maps = generate_handle_exception(id, sasm);
543 }
544 break;
545
546 case unwind_exception_id:
547 {
548 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
549 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/,
550 Rexception_save = R31, Rcaller_sp = R30;
551 __ set_info("unwind_exception", dont_gc_arguments);
552
553 __ ld(Rcaller_sp, 0, R1_SP);
554 __ push_frame_reg_args(0, R0); // dummy frame for C call
555 __ mr(Rexception_save, Rexception); // save over C call
556 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
557 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc);
558 __ verify_not_null_oop(Rexception_save);
559 __ mtctr(R3_RET);
560 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc
561 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once.
562 __ mr(Rexception, Rexception_save); // restore
563 __ mtlr(Rexception_pc);
564 __ bctr();
565 }
566 break;
567
568 case throw_array_store_exception_id:
569 {
570 __ set_info("throw_array_store_exception", dont_gc_arguments);
571 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
572 }
573 break;
574
575 case throw_class_cast_exception_id:
576 {
577 __ set_info("throw_class_cast_exception", dont_gc_arguments);
578 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
579 }
580 break;
581
582 case throw_incompatible_class_change_error_id:
583 {
584 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
585 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
586 }
587 break;
588
589 case slow_subtype_check_id:
590 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
591 const Register sub_klass = R5,
592 super_klass = R4,
593 temp1_reg = R6,
594 temp2_reg = R0;
595 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful
596 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne
597 __ blr();
598 }
599 break;
600
601 case monitorenter_nofpu_id:
602 case monitorenter_id:
603 {
604 __ set_info("monitorenter", dont_gc_arguments);
605
606 int save_fpu_registers = (id == monitorenter_id);
607 // Make a frame and preserve the caller's caller-save registers.
608 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
609
610 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3);
611
612 oop_maps = new OopMapSet();
613 oop_maps->add_gc_map(call_offset, oop_map);
614
615 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
616 __ blr();
617 }
618 break;
619
620 case monitorexit_nofpu_id:
621 case monitorexit_id:
622 {
623 // note: Really a leaf routine but must setup last java sp
624 // => use call_RT for now (speed can be improved by
625 // doing last java sp setup manually).
626 __ set_info("monitorexit", dont_gc_arguments);
627
628 int save_fpu_registers = (id == monitorexit_id);
629 // Make a frame and preserve the caller's caller-save registers.
630 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
631
632 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2);
633
634 oop_maps = new OopMapSet();
635 oop_maps->add_gc_map(call_offset, oop_map);
636
637 restore_live_registers(sasm, noreg, noreg, save_fpu_registers);
638 __ blr();
639 }
640 break;
641
642 case deoptimize_id:
643 {
644 __ set_info("deoptimize", dont_gc_arguments);
645 __ std(R0, -8, R1_SP); // Pass trap_request on stack.
646 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false);
647
648 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
649 assert(deopt_blob != NULL, "deoptimization blob must have been created");
650 address stub = deopt_blob->unpack_with_reexecution();
651 //__ load_const_optimized(R0, stub);
652 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
653 __ mtctr(R0);
654 __ bctr();
655 }
656 break;
657
658 case access_field_patching_id:
659 {
660 __ set_info("access_field_patching", dont_gc_arguments);
661 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
662 }
663 break;
664
665 case load_klass_patching_id:
666 {
667 __ set_info("load_klass_patching", dont_gc_arguments);
668 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
669 }
670 break;
671
672 case load_mirror_patching_id:
673 {
674 __ set_info("load_mirror_patching", dont_gc_arguments);
675 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
676 }
677 break;
678
679 case load_appendix_patching_id:
680 {
681 __ set_info("load_appendix_patching", dont_gc_arguments);
682 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
683 }
684 break;
685
686 case dtrace_object_alloc_id:
687 { // O0: object
688 __ unimplemented("stub dtrace_object_alloc_id");
689 __ set_info("dtrace_object_alloc", dont_gc_arguments);
690 // // We can't gc here so skip the oopmap but make sure that all
691 // // the live registers get saved.
692 // save_live_registers(sasm);
693 //
694 // __ save_thread(L7_thread_cache);
695 // __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
696 // relocInfo::runtime_call_type);
697 // __ delayed()->mov(I0, O0);
698 // __ restore_thread(L7_thread_cache);
699 //
700 // restore_live_registers(sasm);
701 // __ ret();
702 // __ delayed()->restore();
703 }
704 break;
705
706 case predicate_failed_trap_id:
707 {
708 __ set_info("predicate_failed_trap", dont_gc_arguments);
709 OopMap* oop_map = save_live_registers(sasm);
710
711 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
712
713 oop_maps = new OopMapSet();
714 oop_maps->add_gc_map(call_offset, oop_map);
715
716 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
717 assert(deopt_blob != NULL, "deoptimization blob must have been created");
718 restore_live_registers(sasm, noreg, noreg);
719
720 address stub = deopt_blob->unpack_with_reexecution();
721 //__ load_const_optimized(R0, stub);
722 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
723 __ mtctr(R0);
724 __ bctr();
725 }
726 break;
727
728 default:
729 {
730 __ set_info("unimplemented entry", dont_gc_arguments);
731 __ mflr(R0);
732 __ std(R0, _abi(lr), R1_SP);
733 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame
734 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord);
735 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0);
736
737 __ load_const_optimized(R4_ARG2, (int)id);
738 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2);
739
740 oop_maps = new OopMapSet();
741 oop_maps->add_gc_map(call_offset, oop_map);
742 __ should_not_reach_here();
743 }
744 break;
745 }
746 return oop_maps;
747 }
748
749
750 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
751 __ block_comment("generate_handle_exception");
752
753 // Save registers, if required.
754 OopMapSet* oop_maps = new OopMapSet();
755 OopMap* oop_map = NULL;
756 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/,
757 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/;
758
759 switch (id) {
760 case forward_exception_id:
761 // We're handling an exception in the context of a compiled frame.
762 // The registers have been saved in the standard places. Perform
763 // an exception lookup in the caller and dispatch to the handler
764 // if found. Otherwise unwind and dispatch to the callers
765 // exception handler.
766 oop_map = generate_oop_map(sasm, true);
767 // Transfer the pending exception to the exception_oop.
768 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr),
769 // but we support additional slots in the frame for parameter passing.
770 __ ld(Rexception_pc, 0, R1_SP);
771 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
772 __ li(R0, 0);
773 __ ld(Rexception_pc, _abi(lr), Rexception_pc);
774 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread);
775 break;
776 case handle_exception_nofpu_id:
777 case handle_exception_id:
778 // At this point all registers MAY be live.
779 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc);
780 break;
781 case handle_exception_from_callee_id:
782 // At this point all registers except exception oop and exception pc are dead.
783 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
784 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
785 __ std(Rexception_pc, _abi(lr), R1_SP);
786 __ push_frame(frame_size_in_bytes, R0);
787 break;
788 default: ShouldNotReachHere();
789 }
790
791 __ verify_not_null_oop(Rexception);
792
793 #ifdef ASSERT
794 // Check that fields in JavaThread for exception oop and issuing pc are
795 // empty before writing to them.
796 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
797 __ cmpdi(CCR0, R0, 0);
798 __ asm_assert_eq("exception oop already set", 0x963);
799 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
800 __ cmpdi(CCR0, R0, 0);
801 __ asm_assert_eq("exception pc already set", 0x962);
802 #endif
803
804 // Save the exception and issuing pc in the thread.
805 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
806 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread);
807
808 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
809 oop_maps->add_gc_map(call_offset, oop_map);
810
811 __ mtctr(R3_RET);
812
813 // Note: if nmethod has been deoptimized then regardless of
814 // whether it had a handler or not we will deoptimize
815 // by entering the deopt blob with a pending exception.
816
817 // Restore the registers that were saved at the beginning, remove
818 // the frame and jump to the exception handler.
819 switch (id) {
820 case forward_exception_id:
821 case handle_exception_nofpu_id:
822 case handle_exception_id:
823 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id);
824 __ bctr();
825 break;
826 case handle_exception_from_callee_id: {
827 __ pop_frame();
828 __ ld(Rexception_pc, _abi(lr), R1_SP);
829 __ mtlr(Rexception_pc);
830 __ bctr();
831 break;
832 }
833 default: ShouldNotReachHere();
834 }
835
836 return oop_maps;
837 }
838
839 const char *Runtime1::pd_name_for_address(address entry) {
840 return "<unknown function>";
841 }
842
843 #undef __