1 /*
2 * Copyright (c) 1999, 2017, 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/cardTableModRefBS.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/g1CardTable.hpp"
48 #include "gc/g1/g1BarrierSet.hpp"
49 #endif
50
51
52 // Implementation of StubAssembler
53
54 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
55 // setup registers
56 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
57 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different");
58 assert(args_size >= 0, "illegal args_size");
59 bool align_stack = false;
60
61 mov(c_rarg0, rthread);
62 set_num_rt_args(0); // Nothing on stack
63
64 Label retaddr;
65 set_last_Java_frame(sp, rfp, retaddr, rscratch1);
66
67 // do the call
68 lea(rscratch1, RuntimeAddress(entry));
69 blrt(rscratch1, args_size + 1, 8, 1);
70 bind(retaddr);
71 int call_offset = offset();
72 // verify callee-saved register
73 #ifdef ASSERT
74 push(r0, sp);
75 { Label L;
76 get_thread(r0);
77 cmp(rthread, r0);
78 br(Assembler::EQ, L);
79 stop("StubAssembler::call_RT: rthread not callee saved?");
80 bind(L);
81 }
82 pop(r0, sp);
83 #endif
84 reset_last_Java_frame(true);
85 maybe_isb();
86
87 // check for pending exceptions
88 { Label L;
89 // check for pending exceptions (java_thread is set upon return)
90 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
91 cbz(rscratch1, L);
92 // exception pending => remove activation and forward to exception handler
93 // make sure that the vm_results are cleared
94 if (oop_result1->is_valid()) {
95 str(zr, Address(rthread, JavaThread::vm_result_offset()));
96 }
97 if (metadata_result->is_valid()) {
98 str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
99 }
100 if (frame_size() == no_frame_size) {
101 leave();
102 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
103 } else if (_stub_id == Runtime1::forward_exception_id) {
104 should_not_reach_here();
105 } else {
106 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
107 }
108 bind(L);
109 }
110 // get oop results if there are any and reset the values in the thread
111 if (oop_result1->is_valid()) {
112 get_vm_result(oop_result1, rthread);
113 }
114 if (metadata_result->is_valid()) {
115 get_vm_result_2(metadata_result, rthread);
116 }
117 return call_offset;
118 }
119
120
121 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
122 mov(c_rarg1, arg1);
123 return call_RT(oop_result1, metadata_result, entry, 1);
124 }
125
126
127 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
128 if (c_rarg1 == arg2) {
129 if (c_rarg2 == arg1) {
130 mov(rscratch1, arg1);
131 mov(arg1, arg2);
132 mov(arg2, rscratch1);
133 } else {
134 mov(c_rarg2, arg2);
135 mov(c_rarg1, arg1);
136 }
137 } else {
138 mov(c_rarg1, arg1);
139 mov(c_rarg2, arg2);
140 }
141 return call_RT(oop_result1, metadata_result, entry, 2);
142 }
143
144
145 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
146 // if there is any conflict use the stack
147 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
148 arg2 == c_rarg1 || arg1 == c_rarg3 ||
149 arg3 == c_rarg1 || arg1 == c_rarg2) {
150 stp(arg3, arg2, Address(pre(sp, 2 * wordSize)));
151 stp(arg1, zr, Address(pre(sp, -2 * wordSize)));
152 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize)));
153 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize)));
154 } else {
155 mov(c_rarg1, arg1);
156 mov(c_rarg2, arg2);
157 mov(c_rarg3, arg3);
158 }
159 return call_RT(oop_result1, metadata_result, entry, 3);
160 }
161
162 // Implementation of StubFrame
163
164 class StubFrame: public StackObj {
165 private:
166 StubAssembler* _sasm;
167
168 public:
169 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
170 void load_argument(int offset_in_words, Register reg);
171
172 ~StubFrame();
173 };;
174
175
176 #define __ _sasm->
177
178 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
179 _sasm = sasm;
180 __ set_info(name, must_gc_arguments);
181 __ enter();
182 }
183
184 // load parameters that were stored with LIR_Assembler::store_parameter
185 // Note: offsets for store_parameter and load_argument must match
186 void StubFrame::load_argument(int offset_in_words, Register reg) {
187 // rbp, + 0: link
188 // + 1: return address
189 // + 2: argument with offset 0
190 // + 3: argument with offset 1
191 // + 4: ...
192
193 __ ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord));
194 }
195
196
197 StubFrame::~StubFrame() {
198 __ leave();
199 __ ret(lr);
200 }
201
202 #undef __
203
204
205 // Implementation of Runtime1
206
207 #define __ sasm->
208
209 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
210
211 // Stack layout for saving/restoring all the registers needed during a runtime
212 // call (this includes deoptimization)
213 // Note: note that users of this frame may well have arguments to some runtime
214 // while these values are on the stack. These positions neglect those arguments
215 // but the code in save_live_registers will take the argument count into
216 // account.
217 //
218
219 enum reg_save_layout {
220 reg_save_frame_size = 32 /* float */ + 32 /* integer */
221 };
222
223 // Save off registers which might be killed by calls into the runtime.
224 // Tries to smart of about FP registers. In particular we separate
225 // saving and describing the FPU registers for deoptimization since we
226 // have to save the FPU registers twice if we describe them. The
227 // deopt blob is the only thing which needs to describe FPU registers.
228 // In all other cases it should be sufficient to simply save their
229 // current value.
230
231 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
232 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
233 static int reg_save_size_in_words;
234 static int frame_size_in_bytes = -1;
235
236 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
237 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord;
238 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
239 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
240 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
241
242 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
243 Register r = as_Register(i);
244 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) {
245 int sp_offset = cpu_reg_save_offsets[i];
246 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
247 r->as_VMReg());
248 }
249 }
250
251 if (save_fpu_registers) {
252 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
253 FloatRegister r = as_FloatRegister(i);
254 {
255 int sp_offset = fpu_reg_save_offsets[i];
256 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
257 r->as_VMReg());
258 }
259 }
260 }
261 return oop_map;
262 }
263
264 static OopMap* save_live_registers(StubAssembler* sasm,
265 bool save_fpu_registers = true) {
266 __ block_comment("save_live_registers");
267
268 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp
269
270 if (save_fpu_registers) {
271 for (int i = 30; i >= 0; i -= 2)
272 __ stpd(as_FloatRegister(i), as_FloatRegister(i+1),
273 Address(__ pre(sp, -2 * wordSize)));
274 } else {
275 __ add(sp, sp, -32 * wordSize);
276 }
277
278 return generate_oop_map(sasm, save_fpu_registers);
279 }
280
281 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
282 if (restore_fpu_registers) {
283 for (int i = 0; i < 32; i += 2)
284 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
285 Address(__ post(sp, 2 * wordSize)));
286 } else {
287 __ add(sp, sp, 32 * wordSize);
288 }
289
290 __ pop(RegSet::range(r0, r29), sp);
291 }
292
293 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) {
294
295 if (restore_fpu_registers) {
296 for (int i = 0; i < 32; i += 2)
297 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
298 Address(__ post(sp, 2 * wordSize)));
299 } else {
300 __ add(sp, sp, 32 * wordSize);
301 }
302
303 __ ldp(zr, r1, Address(__ post(sp, 16)));
304 __ pop(RegSet::range(r2, r29), sp);
305 }
306
307
308
309 void Runtime1::initialize_pd() {
310 int i;
311 int sp_offset = 0;
312
313 // all float registers are saved explicitly
314 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
315 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
316 fpu_reg_save_offsets[i] = sp_offset;
317 sp_offset += 2; // SP offsets are in halfwords
318 }
319
320 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
321 Register r = as_Register(i);
322 cpu_reg_save_offsets[i] = sp_offset;
323 sp_offset += 2; // SP offsets are in halfwords
324 }
325 }
326
327
328 // target: the entry point of the method that creates and posts the exception oop
329 // has_argument: true if the exception needs an argument (passed in rscratch1)
330
331 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
332 // make a frame and preserve the caller's caller-save registers
333 OopMap* oop_map = save_live_registers(sasm);
334 int call_offset;
335 if (!has_argument) {
336 call_offset = __ call_RT(noreg, noreg, target);
337 } else {
338 call_offset = __ call_RT(noreg, noreg, target, rscratch1);
339 }
340 OopMapSet* oop_maps = new OopMapSet();
341 oop_maps->add_gc_map(call_offset, oop_map);
342
343 __ should_not_reach_here();
344 return oop_maps;
345 }
346
347
348 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
349 __ block_comment("generate_handle_exception");
350
351 // incoming parameters
352 const Register exception_oop = r0;
353 const Register exception_pc = r3;
354 // other registers used in this stub
355
356 // Save registers, if required.
357 OopMapSet* oop_maps = new OopMapSet();
358 OopMap* oop_map = NULL;
359 switch (id) {
360 case forward_exception_id:
361 // We're handling an exception in the context of a compiled frame.
362 // The registers have been saved in the standard places. Perform
363 // an exception lookup in the caller and dispatch to the handler
364 // if found. Otherwise unwind and dispatch to the callers
365 // exception handler.
366 oop_map = generate_oop_map(sasm, 1 /*thread*/);
367
368 // load and clear pending exception oop into r0
369 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset()));
370 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
371
372 // load issuing PC (the return address for this stub) into r3
373 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord));
374
375 // make sure that the vm_results are cleared (may be unnecessary)
376 __ str(zr, Address(rthread, JavaThread::vm_result_offset()));
377 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
378 break;
379 case handle_exception_nofpu_id:
380 case handle_exception_id:
381 // At this point all registers MAY be live.
382 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id);
383 break;
384 case handle_exception_from_callee_id: {
385 // At this point all registers except exception oop (r0) and
386 // exception pc (lr) are dead.
387 const int frame_size = 2 /*fp, return address*/;
388 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
389 sasm->set_frame_size(frame_size);
390 break;
391 }
392 default:
393 __ should_not_reach_here();
394 break;
395 }
396
397 // verify that only r0 and r3 are valid at this time
398 __ invalidate_registers(false, true, true, false, true, true);
399 // verify that r0 contains a valid exception
400 __ verify_not_null_oop(exception_oop);
401
402 #ifdef ASSERT
403 // check that fields in JavaThread for exception oop and issuing pc are
404 // empty before writing to them
405 Label oop_empty;
406 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
407 __ cbz(rscratch1, oop_empty);
408 __ stop("exception oop already set");
409 __ bind(oop_empty);
410
411 Label pc_empty;
412 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
413 __ cbz(rscratch1, pc_empty);
414 __ stop("exception pc already set");
415 __ bind(pc_empty);
416 #endif
417
418 // save exception oop and issuing pc into JavaThread
419 // (exception handler will load it from here)
420 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset()));
421 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset()));
422
423 // patch throwing pc into return address (has bci & oop map)
424 __ str(exception_pc, Address(rfp, 1*BytesPerWord));
425
426 // compute the exception handler.
427 // the exception oop and the throwing pc are read from the fields in JavaThread
428 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
429 oop_maps->add_gc_map(call_offset, oop_map);
430
431 // r0: handler address
432 // will be the deopt blob if nmethod was deoptimized while we looked up
433 // handler regardless of whether handler existed in the nmethod.
434
435 // only r0 is valid at this time, all other registers have been destroyed by the runtime call
436 __ invalidate_registers(false, true, true, true, true, true);
437
438 // patch the return address, this stub will directly return to the exception handler
439 __ str(r0, Address(rfp, 1*BytesPerWord));
440
441 switch (id) {
442 case forward_exception_id:
443 case handle_exception_nofpu_id:
444 case handle_exception_id:
445 // Restore the registers that were saved at the beginning.
446 restore_live_registers(sasm, id != handle_exception_nofpu_id);
447 break;
448 case handle_exception_from_callee_id:
449 // Pop the return address.
450 __ leave();
451 __ ret(lr); // jump to exception handler
452 break;
453 default: ShouldNotReachHere();
454 }
455
456 return oop_maps;
457 }
458
459
460 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
461 // incoming parameters
462 const Register exception_oop = r0;
463 // callee-saved copy of exception_oop during runtime call
464 const Register exception_oop_callee_saved = r19;
465 // other registers used in this stub
466 const Register exception_pc = r3;
467 const Register handler_addr = r1;
468
469 // verify that only r0, is valid at this time
470 __ invalidate_registers(false, true, true, true, true, true);
471
472 #ifdef ASSERT
473 // check that fields in JavaThread for exception oop and issuing pc are empty
474 Label oop_empty;
475 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
476 __ cbz(rscratch1, oop_empty);
477 __ stop("exception oop must be empty");
478 __ bind(oop_empty);
479
480 Label pc_empty;
481 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
482 __ cbz(rscratch1, pc_empty);
483 __ stop("exception pc must be empty");
484 __ bind(pc_empty);
485 #endif
486
487 // Save our return address because
488 // exception_handler_for_return_address will destroy it. We also
489 // save exception_oop
490 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize)));
491
492 // search the exception handler address of the caller (using the return address)
493 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr);
494 // r0: exception handler address of the caller
495
496 // Only R0 is valid at this time; all other registers have been
497 // destroyed by the call.
498 __ invalidate_registers(false, true, true, true, false, true);
499
500 // move result of call into correct register
501 __ mov(handler_addr, r0);
502
503 // get throwing pc (= return address).
504 // lr has been destroyed by the call
505 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize)));
506 __ mov(r3, lr);
507
508 __ verify_not_null_oop(exception_oop);
509
510 // continue at exception handler (return address removed)
511 // note: do *not* remove arguments when unwinding the
512 // activation since the caller assumes having
513 // all arguments on the stack when entering the
514 // runtime to determine the exception handler
515 // (GC happens at call site with arguments!)
516 // r0: exception oop
517 // r3: throwing pc
518 // r1: exception handler
519 __ br(handler_addr);
520 }
521
522
523
524 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
525 // use the maximum number of runtime-arguments here because it is difficult to
526 // distinguish each RT-Call.
527 // Note: This number affects also the RT-Call in generate_handle_exception because
528 // the oop-map is shared for all calls.
529 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
530 assert(deopt_blob != NULL, "deoptimization blob must have been created");
531
532 OopMap* oop_map = save_live_registers(sasm);
533
534 __ mov(c_rarg0, rthread);
535 Label retaddr;
536 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1);
537 // do the call
538 __ lea(rscratch1, RuntimeAddress(target));
539 __ blrt(rscratch1, 1, 0, 1);
540 __ bind(retaddr);
541 OopMapSet* oop_maps = new OopMapSet();
542 oop_maps->add_gc_map(__ offset(), oop_map);
543 // verify callee-saved register
544 #ifdef ASSERT
545 { Label L;
546 __ get_thread(rscratch1);
547 __ cmp(rthread, rscratch1);
548 __ br(Assembler::EQ, L);
549 __ stop("StubAssembler::call_RT: rthread not callee saved?");
550 __ bind(L);
551 }
552 #endif
553 __ reset_last_Java_frame(true);
554 __ maybe_isb();
555
556 // check for pending exceptions
557 { Label L;
558 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
559 __ cbz(rscratch1, L);
560 // exception pending => remove activation and forward to exception handler
561
562 { Label L1;
563 __ cbnz(r0, L1); // have we deoptimized?
564 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
565 __ bind(L1);
566 }
567
568 // the deopt blob expects exceptions in the special fields of
569 // JavaThread, so copy and clear pending exception.
570
571 // load and clear pending exception
572 __ ldr(r0, Address(rthread, Thread::pending_exception_offset()));
573 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
574
575 // check that there is really a valid exception
576 __ verify_not_null_oop(r0);
577
578 // load throwing pc: this is the return address of the stub
579 __ mov(r3, lr);
580
581 #ifdef ASSERT
582 // check that fields in JavaThread for exception oop and issuing pc are empty
583 Label oop_empty;
584 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
585 __ cbz(rscratch1, oop_empty);
586 __ stop("exception oop must be empty");
587 __ bind(oop_empty);
588
589 Label pc_empty;
590 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
591 __ cbz(rscratch1, pc_empty);
592 __ stop("exception pc must be empty");
593 __ bind(pc_empty);
594 #endif
595
596 // store exception oop and throwing pc to JavaThread
597 __ str(r0, Address(rthread, JavaThread::exception_oop_offset()));
598 __ str(r3, Address(rthread, JavaThread::exception_pc_offset()));
599
600 restore_live_registers(sasm);
601
602 __ leave();
603
604 // Forward the exception directly to deopt blob. We can blow no
605 // registers and must leave throwing pc on the stack. A patch may
606 // have values live in registers so the entry point with the
607 // exception in tls.
608 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
609
610 __ bind(L);
611 }
612
613
614 // Runtime will return true if the nmethod has been deoptimized during
615 // the patching process. In that case we must do a deopt reexecute instead.
616
617 Label reexecuteEntry, cont;
618
619 __ cbz(r0, cont); // have we deoptimized?
620
621 // Will reexecute. Proper return address is already on the stack we just restore
622 // registers, pop all of our frame but the return address and jump to the deopt blob
623 restore_live_registers(sasm);
624 __ leave();
625 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
626
627 __ bind(cont);
628 restore_live_registers(sasm);
629 __ leave();
630 __ ret(lr);
631
632 return oop_maps;
633 }
634
635
636 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
637
638 const Register exception_oop = r0;
639 const Register exception_pc = r3;
640
641 // for better readability
642 const bool must_gc_arguments = true;
643 const bool dont_gc_arguments = false;
644
645 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
646 bool save_fpu_registers = true;
647
648 // stub code & info for the different stubs
649 OopMapSet* oop_maps = NULL;
650 OopMap* oop_map = NULL;
651 switch (id) {
652 {
653 case forward_exception_id:
654 {
655 oop_maps = generate_handle_exception(id, sasm);
656 __ leave();
657 __ ret(lr);
658 }
659 break;
660
661 case throw_div0_exception_id:
662 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
663 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
664 }
665 break;
666
667 case throw_null_pointer_exception_id:
668 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
669 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
670 }
671 break;
672
673 case new_instance_id:
674 case fast_new_instance_id:
675 case fast_new_instance_init_check_id:
676 {
677 Register klass = r3; // Incoming
678 Register obj = r0; // Result
679
680 if (id == new_instance_id) {
681 __ set_info("new_instance", dont_gc_arguments);
682 } else if (id == fast_new_instance_id) {
683 __ set_info("fast new_instance", dont_gc_arguments);
684 } else {
685 assert(id == fast_new_instance_init_check_id, "bad StubID");
686 __ set_info("fast new_instance init check", dont_gc_arguments);
687 }
688
689 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
690 UseTLAB && FastTLABRefill) {
691 Label slow_path;
692 Register obj_size = r2;
693 Register t1 = r19;
694 Register t2 = r4;
695 assert_different_registers(klass, obj, obj_size, t1, t2);
696
697 __ stp(r5, r19, Address(__ pre(sp, -2 * wordSize)));
698
699 if (id == fast_new_instance_init_check_id) {
700 // make sure the klass is initialized
701 __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset()));
702 __ cmpw(rscratch1, InstanceKlass::fully_initialized);
703 __ br(Assembler::NE, slow_path);
704 }
705
706 #ifdef ASSERT
707 // assert object can be fast path allocated
708 {
709 Label ok, not_ok;
710 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
711 __ cmp(obj_size, 0u);
712 __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0)
713 __ tstw(obj_size, Klass::_lh_instance_slow_path_bit);
714 __ br(Assembler::EQ, ok);
715 __ bind(not_ok);
716 __ stop("assert(can be fast path allocated)");
717 __ should_not_reach_here();
718 __ bind(ok);
719 }
720 #endif // ASSERT
721
722 // if we got here then the TLAB allocation failed, so try
723 // refilling the TLAB or allocating directly from eden.
724 Label retry_tlab, try_eden;
725 __ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy r3 (klass), returns r5
726
727 __ bind(retry_tlab);
728
729 // get the instance size (size is postive so movl is fine for 64bit)
730 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
731
732 __ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path);
733
734 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ true);
735 __ verify_oop(obj);
736 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
737 __ ret(lr);
738
739 __ bind(try_eden);
740 // get the instance size (size is postive so movl is fine for 64bit)
741 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
742
743 __ eden_allocate(obj, obj_size, 0, t1, slow_path);
744 __ incr_allocated_bytes(rthread, obj_size, 0, rscratch1);
745
746 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false);
747 __ verify_oop(obj);
748 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
749 __ ret(lr);
750
751 __ bind(slow_path);
752 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
753 }
754
755 __ enter();
756 OopMap* map = save_live_registers(sasm);
757 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
758 oop_maps = new OopMapSet();
759 oop_maps->add_gc_map(call_offset, map);
760 restore_live_registers_except_r0(sasm);
761 __ verify_oop(obj);
762 __ leave();
763 __ ret(lr);
764
765 // r0,: new instance
766 }
767
768 break;
769
770 case counter_overflow_id:
771 {
772 Register bci = r0, method = r1;
773 __ enter();
774 OopMap* map = save_live_registers(sasm);
775 // Retrieve bci
776 __ ldrw(bci, Address(rfp, 2*BytesPerWord));
777 // And a pointer to the Method*
778 __ ldr(method, Address(rfp, 3*BytesPerWord));
779 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
780 oop_maps = new OopMapSet();
781 oop_maps->add_gc_map(call_offset, map);
782 restore_live_registers(sasm);
783 __ leave();
784 __ ret(lr);
785 }
786 break;
787
788 case new_type_array_id:
789 case new_object_array_id:
790 {
791 Register length = r19; // Incoming
792 Register klass = r3; // Incoming
793 Register obj = r0; // Result
794
795 if (id == new_type_array_id) {
796 __ set_info("new_type_array", dont_gc_arguments);
797 } else {
798 __ set_info("new_object_array", dont_gc_arguments);
799 }
800
801 #ifdef ASSERT
802 // assert object type is really an array of the proper kind
803 {
804 Label ok;
805 Register t0 = obj;
806 __ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
807 __ asrw(t0, t0, Klass::_lh_array_tag_shift);
808 int tag = ((id == new_type_array_id)
809 ? Klass::_lh_array_tag_type_value
810 : Klass::_lh_array_tag_obj_value);
811 __ mov(rscratch1, tag);
812 __ cmpw(t0, rscratch1);
813 __ br(Assembler::EQ, ok);
814 __ stop("assert(is an array klass)");
815 __ should_not_reach_here();
816 __ bind(ok);
817 }
818 #endif // ASSERT
819
820 if (UseTLAB && FastTLABRefill) {
821 Register arr_size = r4;
822 Register t1 = r2;
823 Register t2 = r5;
824 Label slow_path;
825 assert_different_registers(length, klass, obj, arr_size, t1, t2);
826
827 // check that array length is small enough for fast path.
828 __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length);
829 __ cmpw(length, rscratch1);
830 __ br(Assembler::HI, slow_path);
831
832 // if we got here then the TLAB allocation failed, so try
833 // refilling the TLAB or allocating directly from eden.
834 Label retry_tlab, try_eden;
835 const Register thread =
836 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves r19 & r3, returns rthread
837
838 __ bind(retry_tlab);
839
840 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
841 // since size is positive ldrw does right thing on 64bit
842 __ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
843 __ lslvw(arr_size, length, t1);
844 __ ubfx(t1, t1, Klass::_lh_header_size_shift,
845 exact_log2(Klass::_lh_header_size_mask + 1));
846 __ add(arr_size, arr_size, t1);
847 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
848 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
849
850 __ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path); // preserves arr_size
851
852 __ initialize_header(obj, klass, length, t1, t2);
853 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
854 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
855 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
856 __ andr(t1, t1, Klass::_lh_header_size_mask);
857 __ sub(arr_size, arr_size, t1); // body length
858 __ add(t1, t1, obj); // body start
859 if (!ZeroTLAB) {
860 __ initialize_body(t1, arr_size, 0, t2);
861 }
862 __ verify_oop(obj);
863
864 __ ret(lr);
865
866 __ bind(try_eden);
867 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
868 // since size is positive ldrw does right thing on 64bit
869 __ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
870 // since size is postive movw does right thing on 64bit
871 __ movw(arr_size, length);
872 __ lslvw(arr_size, length, t1);
873 __ ubfx(t1, t1, Klass::_lh_header_size_shift,
874 exact_log2(Klass::_lh_header_size_mask + 1));
875 __ add(arr_size, arr_size, t1);
876 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
877 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
878
879 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
880 __ incr_allocated_bytes(thread, arr_size, 0, rscratch1);
881
882 __ initialize_header(obj, klass, length, t1, t2);
883 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
884 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
885 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
886 __ andr(t1, t1, Klass::_lh_header_size_mask);
887 __ sub(arr_size, arr_size, t1); // body length
888 __ add(t1, t1, obj); // body start
889 __ initialize_body(t1, arr_size, 0, t2);
890 __ verify_oop(obj);
891
892 __ ret(lr);
893
894 __ bind(slow_path);
895 }
896
897 __ enter();
898 OopMap* map = save_live_registers(sasm);
899 int call_offset;
900 if (id == new_type_array_id) {
901 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
902 } else {
903 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
904 }
905
906 oop_maps = new OopMapSet();
907 oop_maps->add_gc_map(call_offset, map);
908 restore_live_registers_except_r0(sasm);
909
910 __ verify_oop(obj);
911 __ leave();
912 __ ret(lr);
913
914 // r0: new array
915 }
916 break;
917
918 case new_multi_array_id:
919 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
920 // r0,: klass
921 // r19,: rank
922 // r2: address of 1st dimension
923 OopMap* map = save_live_registers(sasm);
924 __ mov(c_rarg1, r0);
925 __ mov(c_rarg3, r2);
926 __ mov(c_rarg2, r19);
927 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3);
928
929 oop_maps = new OopMapSet();
930 oop_maps->add_gc_map(call_offset, map);
931 restore_live_registers_except_r0(sasm);
932
933 // r0,: new multi array
934 __ verify_oop(r0);
935 }
936 break;
937
938 case register_finalizer_id:
939 {
940 __ set_info("register_finalizer", dont_gc_arguments);
941
942 // This is called via call_runtime so the arguments
943 // will be place in C abi locations
944
945 __ verify_oop(c_rarg0);
946
947 // load the klass and check the has finalizer flag
948 Label register_finalizer;
949 Register t = r5;
950 __ load_klass(t, r0);
951 __ ldrw(t, Address(t, Klass::access_flags_offset()));
952 __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer);
953 __ ret(lr);
954
955 __ bind(register_finalizer);
956 __ enter();
957 OopMap* oop_map = save_live_registers(sasm);
958 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0);
959 oop_maps = new OopMapSet();
960 oop_maps->add_gc_map(call_offset, oop_map);
961
962 // Now restore all the live registers
963 restore_live_registers(sasm);
964
965 __ leave();
966 __ ret(lr);
967 }
968 break;
969
970 case throw_class_cast_exception_id:
971 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
972 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
973 }
974 break;
975
976 case throw_incompatible_class_change_error_id:
977 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
978 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
979 }
980 break;
981
982 case slow_subtype_check_id:
983 {
984 // Typical calling sequence:
985 // __ push(klass_RInfo); // object klass or other subclass
986 // __ push(sup_k_RInfo); // array element klass or other superclass
987 // __ bl(slow_subtype_check);
988 // Note that the subclass is pushed first, and is therefore deepest.
989 enum layout {
990 r0_off, r0_off_hi,
991 r2_off, r2_off_hi,
992 r4_off, r4_off_hi,
993 r5_off, r5_off_hi,
994 sup_k_off, sup_k_off_hi,
995 klass_off, klass_off_hi,
996 framesize,
997 result_off = sup_k_off
998 };
999
1000 __ set_info("slow_subtype_check", dont_gc_arguments);
1001 __ push(RegSet::of(r0, r2, r4, r5), sp);
1002
1003 // This is called by pushing args and not with C abi
1004 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
1005 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
1006
1007 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size));
1008
1009 Label miss;
1010 __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss);
1011
1012 // fallthrough on success:
1013 __ mov(rscratch1, 1);
1014 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
1015 __ pop(RegSet::of(r0, r2, r4, r5), sp);
1016 __ ret(lr);
1017
1018 __ bind(miss);
1019 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
1020 __ pop(RegSet::of(r0, r2, r4, r5), sp);
1021 __ ret(lr);
1022 }
1023 break;
1024
1025 case monitorenter_nofpu_id:
1026 save_fpu_registers = false;
1027 // fall through
1028 case monitorenter_id:
1029 {
1030 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
1031 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1032
1033 // Called with store_parameter and not C abi
1034
1035 f.load_argument(1, r0); // r0,: object
1036 f.load_argument(0, r1); // r1,: lock address
1037
1038 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1);
1039
1040 oop_maps = new OopMapSet();
1041 oop_maps->add_gc_map(call_offset, map);
1042 restore_live_registers(sasm, save_fpu_registers);
1043 }
1044 break;
1045
1046 case monitorexit_nofpu_id:
1047 save_fpu_registers = false;
1048 // fall through
1049 case monitorexit_id:
1050 {
1051 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1052 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1053
1054 // Called with store_parameter and not C abi
1055
1056 f.load_argument(0, r0); // r0,: lock address
1057
1058 // note: really a leaf routine but must setup last java sp
1059 // => use call_RT for now (speed can be improved by
1060 // doing last java sp setup manually)
1061 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0);
1062
1063 oop_maps = new OopMapSet();
1064 oop_maps->add_gc_map(call_offset, map);
1065 restore_live_registers(sasm, save_fpu_registers);
1066 }
1067 break;
1068
1069 case deoptimize_id:
1070 {
1071 StubFrame f(sasm, "deoptimize", dont_gc_arguments);
1072 OopMap* oop_map = save_live_registers(sasm);
1073 f.load_argument(0, c_rarg1);
1074 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1);
1075
1076 oop_maps = new OopMapSet();
1077 oop_maps->add_gc_map(call_offset, oop_map);
1078 restore_live_registers(sasm);
1079 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1080 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1081 __ leave();
1082 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1083 }
1084 break;
1085
1086 case throw_range_check_failed_id:
1087 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
1088 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1089 }
1090 break;
1091
1092 case unwind_exception_id:
1093 { __ set_info("unwind_exception", dont_gc_arguments);
1094 // note: no stubframe since we are about to leave the current
1095 // activation and we are calling a leaf VM function only.
1096 generate_unwind_exception(sasm);
1097 }
1098 break;
1099
1100 case access_field_patching_id:
1101 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
1102 // we should set up register map
1103 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1104 }
1105 break;
1106
1107 case load_klass_patching_id:
1108 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
1109 // we should set up register map
1110 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1111 }
1112 break;
1113
1114 case load_mirror_patching_id:
1115 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
1116 // we should set up register map
1117 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1118 }
1119 break;
1120
1121 case load_appendix_patching_id:
1122 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
1123 // we should set up register map
1124 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1125 }
1126 break;
1127
1128 case handle_exception_nofpu_id:
1129 case handle_exception_id:
1130 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1131 oop_maps = generate_handle_exception(id, sasm);
1132 }
1133 break;
1134
1135 case handle_exception_from_callee_id:
1136 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1137 oop_maps = generate_handle_exception(id, sasm);
1138 }
1139 break;
1140
1141 case throw_index_exception_id:
1142 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
1143 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1144 }
1145 break;
1146
1147 case throw_array_store_exception_id:
1148 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
1149 // tos + 0: link
1150 // + 1: return address
1151 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1152 }
1153 break;
1154
1155 #if INCLUDE_ALL_GCS
1156
1157 case g1_pre_barrier_slow_id:
1158 {
1159 StubFrame f(sasm, "g1_pre_barrier", dont_gc_arguments);
1160 // arg0 : previous value of memory
1161
1162 BarrierSet* bs = Universe::heap()->barrier_set();
1163 if (bs->kind() != BarrierSet::G1BarrierSet) {
1164 __ mov(r0, (int)id);
1165 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1166 __ should_not_reach_here();
1167 break;
1168 }
1169
1170 const Register pre_val = r0;
1171 const Register thread = rthread;
1172 const Register tmp = rscratch1;
1173
1174 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1175 SATBMarkQueue::byte_offset_of_active()));
1176
1177 Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1178 SATBMarkQueue::byte_offset_of_index()));
1179 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1180 SATBMarkQueue::byte_offset_of_buf()));
1181
1182 Label done;
1183 Label runtime;
1184
1185 // Is marking still active?
1186 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
1187 __ ldrw(tmp, in_progress);
1188 } else {
1189 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
1190 __ ldrb(tmp, in_progress);
1191 }
1192 __ cbzw(tmp, done);
1193
1194 // Can we store original value in the thread's buffer?
1195 __ ldr(tmp, queue_index);
1196 __ cbz(tmp, runtime);
1197
1198 __ sub(tmp, tmp, wordSize);
1199 __ str(tmp, queue_index);
1200 __ ldr(rscratch2, buffer);
1201 __ add(tmp, tmp, rscratch2);
1202 f.load_argument(0, rscratch2);
1203 __ str(rscratch2, Address(tmp, 0));
1204 __ b(done);
1205
1206 __ bind(runtime);
1207 __ push_call_clobbered_registers();
1208 f.load_argument(0, pre_val);
1209 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
1210 __ pop_call_clobbered_registers();
1211 __ bind(done);
1212 }
1213 break;
1214 case g1_post_barrier_slow_id:
1215 {
1216 StubFrame f(sasm, "g1_post_barrier", dont_gc_arguments);
1217
1218 // arg0: store_address
1219 Address store_addr(rfp, 2*BytesPerWord);
1220
1221 BarrierSet* bs = Universe::heap()->barrier_set();
1222 CardTableModRefBS* ctbs = barrier_set_cast<CardTableModRefBS>(bs);
1223 CardTable* ct = ctbs->card_table();
1224 assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code");
1225
1226 Label done;
1227 Label runtime;
1228
1229 // At this point we know new_value is non-NULL and the new_value crosses regions.
1230 // Must check to see if card is already dirty
1231
1232 const Register thread = rthread;
1233
1234 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
1235 DirtyCardQueue::byte_offset_of_index()));
1236 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
1237 DirtyCardQueue::byte_offset_of_buf()));
1238
1239 const Register card_offset = rscratch2;
1240 // LR is free here, so we can use it to hold the byte_map_base.
1241 const Register byte_map_base = lr;
1242
1243 assert_different_registers(card_offset, byte_map_base, rscratch1);
1244
1245 f.load_argument(0, card_offset);
1246 __ lsr(card_offset, card_offset, CardTable::card_shift);
1247 __ load_byte_map_base(byte_map_base);
1248 __ ldrb(rscratch1, Address(byte_map_base, card_offset));
1249 __ cmpw(rscratch1, (int)G1CardTable::g1_young_card_val());
1250 __ br(Assembler::EQ, done);
1251
1252 assert((int)CardTable::dirty_card_val() == 0, "must be 0");
1253
1254 __ membar(Assembler::StoreLoad);
1255 __ ldrb(rscratch1, Address(byte_map_base, card_offset));
1256 __ cbzw(rscratch1, done);
1257
1258 // storing region crossing non-NULL, card is clean.
1259 // dirty card and log.
1260 __ strb(zr, Address(byte_map_base, card_offset));
1261
1262 // Convert card offset into an address in card_addr
1263 Register card_addr = card_offset;
1264 __ add(card_addr, byte_map_base, card_addr);
1265
1266 __ ldr(rscratch1, queue_index);
1267 __ cbz(rscratch1, runtime);
1268 __ sub(rscratch1, rscratch1, wordSize);
1269 __ str(rscratch1, queue_index);
1270
1271 // Reuse LR to hold buffer_addr
1272 const Register buffer_addr = lr;
1273
1274 __ ldr(buffer_addr, buffer);
1275 __ str(card_addr, Address(buffer_addr, rscratch1));
1276 __ b(done);
1277
1278 __ bind(runtime);
1279 __ push_call_clobbered_registers();
1280 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
1281 __ pop_call_clobbered_registers();
1282 __ bind(done);
1283
1284 }
1285 break;
1286 #endif
1287
1288 case predicate_failed_trap_id:
1289 {
1290 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
1291
1292 OopMap* map = save_live_registers(sasm);
1293
1294 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1295 oop_maps = new OopMapSet();
1296 oop_maps->add_gc_map(call_offset, map);
1297 restore_live_registers(sasm);
1298 __ leave();
1299 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1300 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1301
1302 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1303 }
1304 break;
1305
1306
1307 default:
1308 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
1309 __ mov(r0, (int)id);
1310 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1311 __ should_not_reach_here();
1312 }
1313 break;
1314 }
1315 }
1316 return oop_maps;
1317 }
1318
1319 #undef __
1320
1321 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }