1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. 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/assembler.hpp"
28 #include "c1/c1_CodeStubs.hpp"
29 #include "c1/c1_Defs.hpp"
30 #include "c1/c1_MacroAssembler.hpp"
31 #include "c1/c1_Runtime1.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/cardTable.hpp"
34 #include "gc/shared/cardTableBarrierSet.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "nativeInst_aarch64.hpp"
37 #include "oops/compiledICHolder.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "register_aarch64.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/signature.hpp"
43 #include "runtime/vframe.hpp"
44 #include "runtime/vframeArray.hpp"
45 #include "vmreg_aarch64.inline.hpp"
46 #if INCLUDE_ALL_GCS
47 #include "gc/g1/g1BarrierSet.hpp"
48 #include "gc/g1/g1CardTable.hpp"
49 #include "gc/shenandoah/shenandoahHeap.hpp"
50 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
51 #include "gc/g1/g1ThreadLocalData.hpp"
52 #endif
53
54
55 // Implementation of StubAssembler
56
57 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
58 // setup registers
59 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
60 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different");
61 assert(args_size >= 0, "illegal args_size");
62 bool align_stack = false;
63
64 mov(c_rarg0, rthread);
65 set_num_rt_args(0); // Nothing on stack
66
67 Label retaddr;
68 set_last_Java_frame(sp, rfp, retaddr, rscratch1);
69
70 // do the call
71 lea(rscratch1, RuntimeAddress(entry));
72 blrt(rscratch1, args_size + 1, 8, 1);
73 bind(retaddr);
74 int call_offset = offset();
75 // verify callee-saved register
76 #ifdef ASSERT
77 push(r0, sp);
78 { Label L;
79 get_thread(r0);
80 cmp(rthread, r0);
81 br(Assembler::EQ, L);
82 stop("StubAssembler::call_RT: rthread not callee saved?");
83 bind(L);
84 }
85 pop(r0, sp);
86 #endif
87 reset_last_Java_frame(true);
88 maybe_isb();
89
90 // check for pending exceptions
91 { Label L;
92 // check for pending exceptions (java_thread is set upon return)
93 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
94 cbz(rscratch1, L);
95 // exception pending => remove activation and forward to exception handler
96 // make sure that the vm_results are cleared
97 if (oop_result1->is_valid()) {
98 str(zr, Address(rthread, JavaThread::vm_result_offset()));
99 }
100 if (metadata_result->is_valid()) {
101 str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
102 }
103 if (frame_size() == no_frame_size) {
104 leave();
105 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
106 } else if (_stub_id == Runtime1::forward_exception_id) {
107 should_not_reach_here();
108 } else {
109 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
110 }
111 bind(L);
112 }
113 // get oop results if there are any and reset the values in the thread
114 if (oop_result1->is_valid()) {
115 get_vm_result(oop_result1, rthread);
116 }
117 if (metadata_result->is_valid()) {
118 get_vm_result_2(metadata_result, rthread);
119 }
120 return call_offset;
121 }
122
123
124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
125 mov(c_rarg1, 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 if (c_rarg1 == arg2) {
132 if (c_rarg2 == arg1) {
133 mov(rscratch1, arg1);
134 mov(arg1, arg2);
135 mov(arg2, rscratch1);
136 } else {
137 mov(c_rarg2, arg2);
138 mov(c_rarg1, arg1);
139 }
140 } else {
141 mov(c_rarg1, arg1);
142 mov(c_rarg2, arg2);
143 }
144 return call_RT(oop_result1, metadata_result, entry, 2);
145 }
146
147
148 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
149 // if there is any conflict use the stack
150 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
151 arg2 == c_rarg1 || arg1 == c_rarg3 ||
152 arg3 == c_rarg1 || arg1 == c_rarg2) {
153 stp(arg3, arg2, Address(pre(sp, 2 * wordSize)));
154 stp(arg1, zr, Address(pre(sp, -2 * wordSize)));
155 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize)));
156 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize)));
157 } else {
158 mov(c_rarg1, arg1);
159 mov(c_rarg2, arg2);
160 mov(c_rarg3, arg3);
161 }
162 return call_RT(oop_result1, metadata_result, entry, 3);
163 }
164
165 // Implementation of StubFrame
166
167 class StubFrame: public StackObj {
168 private:
169 StubAssembler* _sasm;
170
171 public:
172 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
173 void load_argument(int offset_in_words, Register reg);
174
175 ~StubFrame();
176 };;
177
178
179 #define __ _sasm->
180
181 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
182 _sasm = sasm;
183 __ set_info(name, must_gc_arguments);
184 __ enter();
185 }
186
187 // load parameters that were stored with LIR_Assembler::store_parameter
188 // Note: offsets for store_parameter and load_argument must match
189 void StubFrame::load_argument(int offset_in_words, Register reg) {
190 // rbp, + 0: link
191 // + 1: return address
192 // + 2: argument with offset 0
193 // + 3: argument with offset 1
194 // + 4: ...
195
196 __ ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord));
197 }
198
199
200 StubFrame::~StubFrame() {
201 __ leave();
202 __ ret(lr);
203 }
204
205 #undef __
206
207
208 // Implementation of Runtime1
209
210 #define __ sasm->
211
212 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
213
214 // Stack layout for saving/restoring all the registers needed during a runtime
215 // call (this includes deoptimization)
216 // Note: note that users of this frame may well have arguments to some runtime
217 // while these values are on the stack. These positions neglect those arguments
218 // but the code in save_live_registers will take the argument count into
219 // account.
220 //
221
222 enum reg_save_layout {
223 reg_save_frame_size = 32 /* float */ + 32 /* integer */
224 };
225
226 // Save off registers which might be killed by calls into the runtime.
227 // Tries to smart of about FP registers. In particular we separate
228 // saving and describing the FPU registers for deoptimization since we
229 // have to save the FPU registers twice if we describe them. The
230 // deopt blob is the only thing which needs to describe FPU registers.
231 // In all other cases it should be sufficient to simply save their
232 // current value.
233
234 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
235 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
236 static int reg_save_size_in_words;
237 static int frame_size_in_bytes = -1;
238
239 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
240 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord;
241 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
242 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
243 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
244
245 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
246 Register r = as_Register(i);
247 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) {
248 int sp_offset = cpu_reg_save_offsets[i];
249 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
250 r->as_VMReg());
251 }
252 }
253
254 if (save_fpu_registers) {
255 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
256 FloatRegister r = as_FloatRegister(i);
257 {
258 int sp_offset = fpu_reg_save_offsets[i];
259 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
260 r->as_VMReg());
261 }
262 }
263 }
264 return oop_map;
265 }
266
267 static OopMap* save_live_registers(StubAssembler* sasm,
268 bool save_fpu_registers = true) {
269 __ block_comment("save_live_registers");
270
271 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp
272
273 if (save_fpu_registers) {
274 for (int i = 30; i >= 0; i -= 2)
275 __ stpd(as_FloatRegister(i), as_FloatRegister(i+1),
276 Address(__ pre(sp, -2 * wordSize)));
277 } else {
278 __ add(sp, sp, -32 * wordSize);
279 }
280
281 return generate_oop_map(sasm, save_fpu_registers);
282 }
283
284 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
285 if (restore_fpu_registers) {
286 for (int i = 0; i < 32; i += 2)
287 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
288 Address(__ post(sp, 2 * wordSize)));
289 } else {
290 __ add(sp, sp, 32 * wordSize);
291 }
292
293 __ pop(RegSet::range(r0, r29), sp);
294 }
295
296 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) {
297
298 if (restore_fpu_registers) {
299 for (int i = 0; i < 32; i += 2)
300 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
301 Address(__ post(sp, 2 * wordSize)));
302 } else {
303 __ add(sp, sp, 32 * wordSize);
304 }
305
306 __ ldp(zr, r1, Address(__ post(sp, 16)));
307 __ pop(RegSet::range(r2, r29), sp);
308 }
309
310
311
312 void Runtime1::initialize_pd() {
313 int i;
314 int sp_offset = 0;
315
316 // all float registers are saved explicitly
317 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
318 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
319 fpu_reg_save_offsets[i] = sp_offset;
320 sp_offset += 2; // SP offsets are in halfwords
321 }
322
323 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
324 Register r = as_Register(i);
325 cpu_reg_save_offsets[i] = sp_offset;
326 sp_offset += 2; // SP offsets are in halfwords
327 }
328 }
329
330
331 // target: the entry point of the method that creates and posts the exception oop
332 // has_argument: true if the exception needs an argument (passed in rscratch1)
333
334 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
335 // make a frame and preserve the caller's caller-save registers
336 OopMap* oop_map = save_live_registers(sasm);
337 int call_offset;
338 if (!has_argument) {
339 call_offset = __ call_RT(noreg, noreg, target);
340 } else {
341 call_offset = __ call_RT(noreg, noreg, target, rscratch1);
342 }
343 OopMapSet* oop_maps = new OopMapSet();
344 oop_maps->add_gc_map(call_offset, oop_map);
345
346 __ should_not_reach_here();
347 return oop_maps;
348 }
349
350
351 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
352 __ block_comment("generate_handle_exception");
353
354 // incoming parameters
355 const Register exception_oop = r0;
356 const Register exception_pc = r3;
357 // other registers used in this stub
358
359 // Save registers, if required.
360 OopMapSet* oop_maps = new OopMapSet();
361 OopMap* oop_map = NULL;
362 switch (id) {
363 case forward_exception_id:
364 // We're handling an exception in the context of a compiled frame.
365 // The registers have been saved in the standard places. Perform
366 // an exception lookup in the caller and dispatch to the handler
367 // if found. Otherwise unwind and dispatch to the callers
368 // exception handler.
369 oop_map = generate_oop_map(sasm, 1 /*thread*/);
370
371 // load and clear pending exception oop into r0
372 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset()));
373 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
374
375 // load issuing PC (the return address for this stub) into r3
376 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord));
377
378 // make sure that the vm_results are cleared (may be unnecessary)
379 __ str(zr, Address(rthread, JavaThread::vm_result_offset()));
380 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
381 break;
382 case handle_exception_nofpu_id:
383 case handle_exception_id:
384 // At this point all registers MAY be live.
385 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id);
386 break;
387 case handle_exception_from_callee_id: {
388 // At this point all registers except exception oop (r0) and
389 // exception pc (lr) are dead.
390 const int frame_size = 2 /*fp, return address*/;
391 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
392 sasm->set_frame_size(frame_size);
393 break;
394 }
395 default:
396 __ should_not_reach_here();
397 break;
398 }
399
400 // verify that only r0 and r3 are valid at this time
401 __ invalidate_registers(false, true, true, false, true, true);
402 // verify that r0 contains a valid exception
403 __ verify_not_null_oop(exception_oop);
404
405 #ifdef ASSERT
406 // check that fields in JavaThread for exception oop and issuing pc are
407 // empty before writing to them
408 Label oop_empty;
409 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
410 __ cbz(rscratch1, oop_empty);
411 __ stop("exception oop already set");
412 __ bind(oop_empty);
413
414 Label pc_empty;
415 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
416 __ cbz(rscratch1, pc_empty);
417 __ stop("exception pc already set");
418 __ bind(pc_empty);
419 #endif
420
421 // save exception oop and issuing pc into JavaThread
422 // (exception handler will load it from here)
423 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset()));
424 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset()));
425
426 // patch throwing pc into return address (has bci & oop map)
427 __ str(exception_pc, Address(rfp, 1*BytesPerWord));
428
429 // compute the exception handler.
430 // the exception oop and the throwing pc are read from the fields in JavaThread
431 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
432 oop_maps->add_gc_map(call_offset, oop_map);
433
434 // r0: handler address
435 // will be the deopt blob if nmethod was deoptimized while we looked up
436 // handler regardless of whether handler existed in the nmethod.
437
438 // only r0 is valid at this time, all other registers have been destroyed by the runtime call
439 __ invalidate_registers(false, true, true, true, true, true);
440
441 // patch the return address, this stub will directly return to the exception handler
442 __ str(r0, Address(rfp, 1*BytesPerWord));
443
444 switch (id) {
445 case forward_exception_id:
446 case handle_exception_nofpu_id:
447 case handle_exception_id:
448 // Restore the registers that were saved at the beginning.
449 restore_live_registers(sasm, id != handle_exception_nofpu_id);
450 break;
451 case handle_exception_from_callee_id:
452 // Pop the return address.
453 __ leave();
454 __ ret(lr); // jump to exception handler
455 break;
456 default: ShouldNotReachHere();
457 }
458
459 return oop_maps;
460 }
461
462
463 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
464 // incoming parameters
465 const Register exception_oop = r0;
466 // callee-saved copy of exception_oop during runtime call
467 const Register exception_oop_callee_saved = r19;
468 // other registers used in this stub
469 const Register exception_pc = r3;
470 const Register handler_addr = r1;
471
472 // verify that only r0, is valid at this time
473 __ invalidate_registers(false, true, true, true, true, true);
474
475 #ifdef ASSERT
476 // check that fields in JavaThread for exception oop and issuing pc are empty
477 Label oop_empty;
478 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
479 __ cbz(rscratch1, oop_empty);
480 __ stop("exception oop must be empty");
481 __ bind(oop_empty);
482
483 Label pc_empty;
484 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
485 __ cbz(rscratch1, pc_empty);
486 __ stop("exception pc must be empty");
487 __ bind(pc_empty);
488 #endif
489
490 // Save our return address because
491 // exception_handler_for_return_address will destroy it. We also
492 // save exception_oop
493 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize)));
494
495 // search the exception handler address of the caller (using the return address)
496 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr);
497 // r0: exception handler address of the caller
498
499 // Only R0 is valid at this time; all other registers have been
500 // destroyed by the call.
501 __ invalidate_registers(false, true, true, true, false, true);
502
503 // move result of call into correct register
504 __ mov(handler_addr, r0);
505
506 // get throwing pc (= return address).
507 // lr has been destroyed by the call
508 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize)));
509 __ mov(r3, lr);
510
511 __ verify_not_null_oop(exception_oop);
512
513 // continue at exception handler (return address removed)
514 // note: do *not* remove arguments when unwinding the
515 // activation since the caller assumes having
516 // all arguments on the stack when entering the
517 // runtime to determine the exception handler
518 // (GC happens at call site with arguments!)
519 // r0: exception oop
520 // r3: throwing pc
521 // r1: exception handler
522 __ br(handler_addr);
523 }
524
525
526
527 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
528 // use the maximum number of runtime-arguments here because it is difficult to
529 // distinguish each RT-Call.
530 // Note: This number affects also the RT-Call in generate_handle_exception because
531 // the oop-map is shared for all calls.
532 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
533 assert(deopt_blob != NULL, "deoptimization blob must have been created");
534
535 OopMap* oop_map = save_live_registers(sasm);
536
537 __ mov(c_rarg0, rthread);
538 Label retaddr;
539 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1);
540 // do the call
541 __ lea(rscratch1, RuntimeAddress(target));
542 __ blrt(rscratch1, 1, 0, 1);
543 __ bind(retaddr);
544 OopMapSet* oop_maps = new OopMapSet();
545 oop_maps->add_gc_map(__ offset(), oop_map);
546 // verify callee-saved register
547 #ifdef ASSERT
548 { Label L;
549 __ get_thread(rscratch1);
550 __ cmp(rthread, rscratch1);
551 __ br(Assembler::EQ, L);
552 __ stop("StubAssembler::call_RT: rthread not callee saved?");
553 __ bind(L);
554 }
555 #endif
556 __ reset_last_Java_frame(true);
557 __ maybe_isb();
558
559 // check for pending exceptions
560 { Label L;
561 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
562 __ cbz(rscratch1, L);
563 // exception pending => remove activation and forward to exception handler
564
565 { Label L1;
566 __ cbnz(r0, L1); // have we deoptimized?
567 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
568 __ bind(L1);
569 }
570
571 // the deopt blob expects exceptions in the special fields of
572 // JavaThread, so copy and clear pending exception.
573
574 // load and clear pending exception
575 __ ldr(r0, Address(rthread, Thread::pending_exception_offset()));
576 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
577
578 // check that there is really a valid exception
579 __ verify_not_null_oop(r0);
580
581 // load throwing pc: this is the return address of the stub
582 __ mov(r3, lr);
583
584 #ifdef ASSERT
585 // check that fields in JavaThread for exception oop and issuing pc are empty
586 Label oop_empty;
587 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
588 __ cbz(rscratch1, oop_empty);
589 __ stop("exception oop must be empty");
590 __ bind(oop_empty);
591
592 Label pc_empty;
593 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
594 __ cbz(rscratch1, pc_empty);
595 __ stop("exception pc must be empty");
596 __ bind(pc_empty);
597 #endif
598
599 // store exception oop and throwing pc to JavaThread
600 __ str(r0, Address(rthread, JavaThread::exception_oop_offset()));
601 __ str(r3, Address(rthread, JavaThread::exception_pc_offset()));
602
603 restore_live_registers(sasm);
604
605 __ leave();
606
607 // Forward the exception directly to deopt blob. We can blow no
608 // registers and must leave throwing pc on the stack. A patch may
609 // have values live in registers so the entry point with the
610 // exception in tls.
611 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
612
613 __ bind(L);
614 }
615
616
617 // Runtime will return true if the nmethod has been deoptimized during
618 // the patching process. In that case we must do a deopt reexecute instead.
619
620 Label reexecuteEntry, cont;
621
622 __ cbz(r0, cont); // have we deoptimized?
623
624 // Will reexecute. Proper return address is already on the stack we just restore
625 // registers, pop all of our frame but the return address and jump to the deopt blob
626 restore_live_registers(sasm);
627 __ leave();
628 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
629
630 __ bind(cont);
631 restore_live_registers(sasm);
632 __ leave();
633 __ ret(lr);
634
635 return oop_maps;
636 }
637
638
639 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
640
641 const Register exception_oop = r0;
642 const Register exception_pc = r3;
643
644 // for better readability
645 const bool must_gc_arguments = true;
646 const bool dont_gc_arguments = false;
647
648 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
649 bool save_fpu_registers = true;
650
651 // stub code & info for the different stubs
652 OopMapSet* oop_maps = NULL;
653 OopMap* oop_map = NULL;
654 switch (id) {
655 {
656 case forward_exception_id:
657 {
658 oop_maps = generate_handle_exception(id, sasm);
659 __ leave();
660 __ ret(lr);
661 }
662 break;
663
664 case throw_div0_exception_id:
665 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
666 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
667 }
668 break;
669
670 case throw_null_pointer_exception_id:
671 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
672 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
673 }
674 break;
675
676 case new_instance_id:
677 case fast_new_instance_id:
678 case fast_new_instance_init_check_id:
679 {
680 Register klass = r3; // Incoming
681 Register obj = r0; // Result
682
683 if (id == new_instance_id) {
684 __ set_info("new_instance", dont_gc_arguments);
685 } else if (id == fast_new_instance_id) {
686 __ set_info("fast new_instance", dont_gc_arguments);
687 } else {
688 assert(id == fast_new_instance_init_check_id, "bad StubID");
689 __ set_info("fast new_instance init check", dont_gc_arguments);
690 }
691
692 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
693 UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
694 Label slow_path;
695 Register obj_size = r2;
696 Register t1 = r19;
697 Register t2 = r4;
698 assert_different_registers(klass, obj, obj_size, t1, t2);
699
700 __ stp(r19, zr, Address(__ pre(sp, -2 * wordSize)));
701
702 if (id == fast_new_instance_init_check_id) {
703 // make sure the klass is initialized
704 __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset()));
705 __ cmpw(rscratch1, InstanceKlass::fully_initialized);
706 __ br(Assembler::NE, slow_path);
707 }
708
709 #ifdef ASSERT
710 // assert object can be fast path allocated
711 {
712 Label ok, not_ok;
713 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
714 __ cmp(obj_size, 0u);
715 __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0)
716 __ tstw(obj_size, Klass::_lh_instance_slow_path_bit);
717 __ br(Assembler::EQ, ok);
718 __ bind(not_ok);
719 __ stop("assert(can be fast path allocated)");
720 __ should_not_reach_here();
721 __ bind(ok);
722 }
723 #endif // ASSERT
724
725 // get the instance size (size is postive so movl is fine for 64bit)
726 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
727
728 __ eden_allocate(obj, obj_size, 0, t1, slow_path);
729 __ incr_allocated_bytes(rthread, obj_size, 0, rscratch1);
730
731 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false);
732 __ verify_oop(obj);
733 __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize)));
734 __ ret(lr);
735
736 __ bind(slow_path);
737 __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize)));
738 }
739
740 __ enter();
741 OopMap* map = save_live_registers(sasm);
742 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
743 oop_maps = new OopMapSet();
744 oop_maps->add_gc_map(call_offset, map);
745 restore_live_registers_except_r0(sasm);
746 __ verify_oop(obj);
747 __ leave();
748 __ ret(lr);
749
750 // r0,: new instance
751 }
752
753 break;
754
755 case counter_overflow_id:
756 {
757 Register bci = r0, method = r1;
758 __ enter();
759 OopMap* map = save_live_registers(sasm);
760 // Retrieve bci
761 __ ldrw(bci, Address(rfp, 2*BytesPerWord));
762 // And a pointer to the Method*
763 __ ldr(method, Address(rfp, 3*BytesPerWord));
764 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
765 oop_maps = new OopMapSet();
766 oop_maps->add_gc_map(call_offset, map);
767 restore_live_registers(sasm);
768 __ leave();
769 __ ret(lr);
770 }
771 break;
772
773 case new_type_array_id:
774 case new_object_array_id:
775 {
776 Register length = r19; // Incoming
777 Register klass = r3; // Incoming
778 Register obj = r0; // Result
779
780 if (id == new_type_array_id) {
781 __ set_info("new_type_array", dont_gc_arguments);
782 } else {
783 __ set_info("new_object_array", dont_gc_arguments);
784 }
785
786 #ifdef ASSERT
787 // assert object type is really an array of the proper kind
788 {
789 Label ok;
790 Register t0 = obj;
791 __ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
792 __ asrw(t0, t0, Klass::_lh_array_tag_shift);
793 int tag = ((id == new_type_array_id)
794 ? Klass::_lh_array_tag_type_value
795 : Klass::_lh_array_tag_obj_value);
796 __ mov(rscratch1, tag);
797 __ cmpw(t0, rscratch1);
798 __ br(Assembler::EQ, ok);
799 __ stop("assert(is an array klass)");
800 __ should_not_reach_here();
801 __ bind(ok);
802 }
803 #endif // ASSERT
804
805 if (UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
806 Register arr_size = r4;
807 Register t1 = r2;
808 Register t2 = r5;
809 Label slow_path;
810 assert_different_registers(length, klass, obj, arr_size, t1, t2);
811
812 // check that array length is small enough for fast path.
813 __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length);
814 __ cmpw(length, rscratch1);
815 __ br(Assembler::HI, slow_path);
816
817 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
818 // since size is positive ldrw does right thing on 64bit
819 __ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
820 // since size is positive movw does right thing on 64bit
821 __ movw(arr_size, length);
822 __ lslvw(arr_size, length, t1);
823 __ ubfx(t1, t1, Klass::_lh_header_size_shift,
824 exact_log2(Klass::_lh_header_size_mask + 1));
825 __ add(arr_size, arr_size, t1);
826 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
827 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
828
829 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
830 __ incr_allocated_bytes(rthread, arr_size, 0, rscratch1);
831
832 __ initialize_header(obj, klass, length, t1, t2);
833 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
834 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
835 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
836 __ andr(t1, t1, Klass::_lh_header_size_mask);
837 __ sub(arr_size, arr_size, t1); // body length
838 __ add(t1, t1, obj); // body start
839 __ initialize_body(t1, arr_size, 0, t2);
840 __ verify_oop(obj);
841
842 __ ret(lr);
843
844 __ bind(slow_path);
845 }
846
847 __ enter();
848 OopMap* map = save_live_registers(sasm);
849 int call_offset;
850 if (id == new_type_array_id) {
851 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
852 } else {
853 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
854 }
855
856 oop_maps = new OopMapSet();
857 oop_maps->add_gc_map(call_offset, map);
858 restore_live_registers_except_r0(sasm);
859
860 __ verify_oop(obj);
861 __ leave();
862 __ ret(lr);
863
864 // r0: new array
865 }
866 break;
867
868 case new_multi_array_id:
869 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
870 // r0,: klass
871 // r19,: rank
872 // r2: address of 1st dimension
873 OopMap* map = save_live_registers(sasm);
874 __ mov(c_rarg1, r0);
875 __ mov(c_rarg3, r2);
876 __ mov(c_rarg2, r19);
877 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3);
878
879 oop_maps = new OopMapSet();
880 oop_maps->add_gc_map(call_offset, map);
881 restore_live_registers_except_r0(sasm);
882
883 // r0,: new multi array
884 __ verify_oop(r0);
885 }
886 break;
887
888 case register_finalizer_id:
889 {
890 __ set_info("register_finalizer", dont_gc_arguments);
891
892 // This is called via call_runtime so the arguments
893 // will be place in C abi locations
894
895 __ verify_oop(c_rarg0);
896
897 // load the klass and check the has finalizer flag
898 Label register_finalizer;
899 Register t = r5;
900 __ load_klass(t, r0);
901 __ ldrw(t, Address(t, Klass::access_flags_offset()));
902 __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer);
903 __ ret(lr);
904
905 __ bind(register_finalizer);
906 __ enter();
907 OopMap* oop_map = save_live_registers(sasm);
908 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0);
909 oop_maps = new OopMapSet();
910 oop_maps->add_gc_map(call_offset, oop_map);
911
912 // Now restore all the live registers
913 restore_live_registers(sasm);
914
915 __ leave();
916 __ ret(lr);
917 }
918 break;
919
920 case throw_class_cast_exception_id:
921 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
922 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
923 }
924 break;
925
926 case throw_incompatible_class_change_error_id:
927 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
928 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
929 }
930 break;
931
932 case slow_subtype_check_id:
933 {
934 // Typical calling sequence:
935 // __ push(klass_RInfo); // object klass or other subclass
936 // __ push(sup_k_RInfo); // array element klass or other superclass
937 // __ bl(slow_subtype_check);
938 // Note that the subclass is pushed first, and is therefore deepest.
939 enum layout {
940 r0_off, r0_off_hi,
941 r2_off, r2_off_hi,
942 r4_off, r4_off_hi,
943 r5_off, r5_off_hi,
944 sup_k_off, sup_k_off_hi,
945 klass_off, klass_off_hi,
946 framesize,
947 result_off = sup_k_off
948 };
949
950 __ set_info("slow_subtype_check", dont_gc_arguments);
951 __ push(RegSet::of(r0, r2, r4, r5), sp);
952
953 // This is called by pushing args and not with C abi
954 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
955 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
956
957 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size));
958
959 Label miss;
960 __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss);
961
962 // fallthrough on success:
963 __ mov(rscratch1, 1);
964 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
965 __ pop(RegSet::of(r0, r2, r4, r5), sp);
966 __ ret(lr);
967
968 __ bind(miss);
969 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
970 __ pop(RegSet::of(r0, r2, r4, r5), sp);
971 __ ret(lr);
972 }
973 break;
974
975 case monitorenter_nofpu_id:
976 save_fpu_registers = false;
977 // fall through
978 case monitorenter_id:
979 {
980 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
981 OopMap* map = save_live_registers(sasm, save_fpu_registers);
982
983 // Called with store_parameter and not C abi
984
985 f.load_argument(1, r0); // r0,: object
986 f.load_argument(0, r1); // r1,: lock address
987
988 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1);
989
990 oop_maps = new OopMapSet();
991 oop_maps->add_gc_map(call_offset, map);
992 restore_live_registers(sasm, save_fpu_registers);
993 }
994 break;
995
996 case monitorexit_nofpu_id:
997 save_fpu_registers = false;
998 // fall through
999 case monitorexit_id:
1000 {
1001 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1002 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1003
1004 // Called with store_parameter and not C abi
1005
1006 f.load_argument(0, r0); // r0,: lock address
1007
1008 // note: really a leaf routine but must setup last java sp
1009 // => use call_RT for now (speed can be improved by
1010 // doing last java sp setup manually)
1011 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0);
1012
1013 oop_maps = new OopMapSet();
1014 oop_maps->add_gc_map(call_offset, map);
1015 restore_live_registers(sasm, save_fpu_registers);
1016 }
1017 break;
1018
1019 case deoptimize_id:
1020 {
1021 StubFrame f(sasm, "deoptimize", dont_gc_arguments);
1022 OopMap* oop_map = save_live_registers(sasm);
1023 f.load_argument(0, c_rarg1);
1024 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1);
1025
1026 oop_maps = new OopMapSet();
1027 oop_maps->add_gc_map(call_offset, oop_map);
1028 restore_live_registers(sasm);
1029 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1030 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1031 __ leave();
1032 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1033 }
1034 break;
1035
1036 case throw_range_check_failed_id:
1037 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
1038 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1039 }
1040 break;
1041
1042 case unwind_exception_id:
1043 { __ set_info("unwind_exception", dont_gc_arguments);
1044 // note: no stubframe since we are about to leave the current
1045 // activation and we are calling a leaf VM function only.
1046 generate_unwind_exception(sasm);
1047 }
1048 break;
1049
1050 case access_field_patching_id:
1051 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
1052 // we should set up register map
1053 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1054 }
1055 break;
1056
1057 case load_klass_patching_id:
1058 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
1059 // we should set up register map
1060 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1061 }
1062 break;
1063
1064 case load_mirror_patching_id:
1065 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
1066 // we should set up register map
1067 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1068 }
1069 break;
1070
1071 case load_appendix_patching_id:
1072 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
1073 // we should set up register map
1074 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1075 }
1076 break;
1077
1078 case handle_exception_nofpu_id:
1079 case handle_exception_id:
1080 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1081 oop_maps = generate_handle_exception(id, sasm);
1082 }
1083 break;
1084
1085 case handle_exception_from_callee_id:
1086 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1087 oop_maps = generate_handle_exception(id, sasm);
1088 }
1089 break;
1090
1091 case throw_index_exception_id:
1092 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
1093 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1094 }
1095 break;
1096
1097 case throw_array_store_exception_id:
1098 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
1099 // tos + 0: link
1100 // + 1: return address
1101 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1102 }
1103 break;
1104
1105 #if INCLUDE_ALL_GCS
1106
1107 case g1_pre_barrier_slow_id:
1108 {
1109 StubFrame f(sasm, "g1_pre_barrier", dont_gc_arguments);
1110 // arg0 : previous value of memory
1111
1112 BarrierSet* bs = BarrierSet::barrier_set();
1113 if (bs->kind() != BarrierSet::G1BarrierSet && bs->kind() != BarrierSet::Shenandoah) {
1114 __ mov(r0, (int)id);
1115 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1116 __ should_not_reach_here();
1117 break;
1118 }
1119
1120 if (bs->kind() == BarrierSet::Shenandoah && !ShenandoahSATBBarrier) {
1121 break;
1122 }
1123
1124 const Register pre_val = r0;
1125 const Register thread = rthread;
1126 const Register tmp = rscratch1;
1127
1128 Address in_progress(thread, in_bytes(UseG1GC ? G1ThreadLocalData::satb_mark_queue_active_offset()
1129 : ShenandoahThreadLocalData::satb_mark_queue_active_offset()));
1130 Address queue_index(thread, in_bytes(UseG1GC ? G1ThreadLocalData::satb_mark_queue_index_offset()
1131 : ShenandoahThreadLocalData::satb_mark_queue_index_offset()));
1132 Address buffer(thread, in_bytes(UseG1GC ? G1ThreadLocalData::satb_mark_queue_buffer_offset()
1133 : ShenandoahThreadLocalData::satb_mark_queue_buffer_offset()));
1134
1135 Label done;
1136 Label runtime;
1137
1138 if (UseShenandoahGC) {
1139 Address gc_state(thread, in_bytes(ShenandoahThreadLocalData::gc_state_offset()));
1140 __ ldrb(tmp, gc_state);
1141 __ tbz(tmp, ShenandoahHeap::MARKING_BITPOS, done);
1142 } else {
1143 assert(UseG1GC, "Should be");
1144 // Is marking still active?
1145 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
1146 __ ldrw(tmp, in_progress);
1147 } else {
1148 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
1149 __ ldrb(tmp, in_progress);
1150 }
1151 __ cbzw(tmp, done);
1152 }
1153
1154 // Can we store original value in the thread's buffer?
1155 __ ldr(tmp, queue_index);
1156 __ cbz(tmp, runtime);
1157
1158 __ sub(tmp, tmp, wordSize);
1159 __ str(tmp, queue_index);
1160 __ ldr(rscratch2, buffer);
1161 __ add(tmp, tmp, rscratch2);
1162 f.load_argument(0, rscratch2);
1163 __ str(rscratch2, Address(tmp, 0));
1164 __ b(done);
1165
1166 __ bind(runtime);
1167 __ push_call_clobbered_registers();
1168 f.load_argument(0, pre_val);
1169 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
1170 __ pop_call_clobbered_registers();
1171 __ bind(done);
1172 }
1173 break;
1174 case g1_post_barrier_slow_id:
1175 {
1176 StubFrame f(sasm, "g1_post_barrier", dont_gc_arguments);
1177
1178 BarrierSet* bs = BarrierSet::barrier_set();
1179 if (bs->kind() != BarrierSet::G1BarrierSet) {
1180 __ mov(r0, (int)id);
1181 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1182 __ should_not_reach_here();
1183 break;
1184 }
1185
1186 // arg0: store_address
1187 Address store_addr(rfp, 2*BytesPerWord);
1188
1189 Label done;
1190 Label runtime;
1191
1192 // At this point we know new_value is non-NULL and the new_value crosses regions.
1193 // Must check to see if card is already dirty
1194
1195 const Register thread = rthread;
1196
1197 Address queue_index(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_index_offset()));
1198 Address buffer(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_buffer_offset()));
1199
1200 const Register card_offset = rscratch2;
1201 // LR is free here, so we can use it to hold the byte_map_base.
1202 const Register byte_map_base = lr;
1203
1204 assert_different_registers(card_offset, byte_map_base, rscratch1);
1205
1206 f.load_argument(0, card_offset);
1207 __ lsr(card_offset, card_offset, CardTable::card_shift);
1208 __ load_byte_map_base(byte_map_base);
1209 __ ldrb(rscratch1, Address(byte_map_base, card_offset));
1210 __ cmpw(rscratch1, (int)G1CardTable::g1_young_card_val());
1211 __ br(Assembler::EQ, done);
1212
1213 assert((int)CardTable::dirty_card_val() == 0, "must be 0");
1214
1215 __ membar(Assembler::StoreLoad);
1216 __ ldrb(rscratch1, Address(byte_map_base, card_offset));
1217 __ cbzw(rscratch1, done);
1218
1219 // storing region crossing non-NULL, card is clean.
1220 // dirty card and log.
1221 __ strb(zr, Address(byte_map_base, card_offset));
1222
1223 // Convert card offset into an address in card_addr
1224 Register card_addr = card_offset;
1225 __ add(card_addr, byte_map_base, card_addr);
1226
1227 __ ldr(rscratch1, queue_index);
1228 __ cbz(rscratch1, runtime);
1229 __ sub(rscratch1, rscratch1, wordSize);
1230 __ str(rscratch1, queue_index);
1231
1232 // Reuse LR to hold buffer_addr
1233 const Register buffer_addr = lr;
1234
1235 __ ldr(buffer_addr, buffer);
1236 __ str(card_addr, Address(buffer_addr, rscratch1));
1237 __ b(done);
1238
1239 __ bind(runtime);
1240 __ push_call_clobbered_registers();
1241 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
1242 __ pop_call_clobbered_registers();
1243 __ bind(done);
1244
1245 }
1246 break;
1247 #endif
1248
1249 case predicate_failed_trap_id:
1250 {
1251 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
1252
1253 OopMap* map = save_live_registers(sasm);
1254
1255 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1256 oop_maps = new OopMapSet();
1257 oop_maps->add_gc_map(call_offset, map);
1258 restore_live_registers(sasm);
1259 __ leave();
1260 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1261 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1262
1263 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1264 }
1265 break;
1266
1267
1268 default:
1269 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
1270 __ mov(r0, (int)id);
1271 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1272 __ should_not_reach_here();
1273 }
1274 break;
1275 }
1276 }
1277 return oop_maps;
1278 }
1279
1280 #undef __
1281
1282 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }