1 /*
2 * Copyright (c) 1999, 2015, 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 "interpreter/interpreter.hpp"
34 #include "nativeInst_aarch64.hpp"
35 #include "oops/compiledICHolder.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "register_aarch64.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/signature.hpp"
41 #include "runtime/vframe.hpp"
42 #include "runtime/vframeArray.hpp"
43 #include "vmreg_aarch64.inline.hpp"
44 #if INCLUDE_ALL_GCS
45 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
46 #endif
47
48
49 // Implementation of StubAssembler
50
51 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
52 // setup registers
53 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
54 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different");
55 assert(args_size >= 0, "illegal args_size");
56 bool align_stack = false;
57
58 mov(c_rarg0, rthread);
59 set_num_rt_args(0); // Nothing on stack
60
61 Label retaddr;
62 set_last_Java_frame(sp, rfp, retaddr, rscratch1);
63
64 // do the call
65 lea(rscratch1, RuntimeAddress(entry));
66 blrt(rscratch1, args_size + 1, 8, 1);
67 bind(retaddr);
68 int call_offset = offset();
69 // verify callee-saved register
70 #ifdef ASSERT
71 push(r0, sp);
72 { Label L;
73 get_thread(r0);
74 cmp(rthread, r0);
75 br(Assembler::EQ, L);
76 stop("StubAssembler::call_RT: rthread not callee saved?");
77 bind(L);
78 }
79 pop(r0, sp);
80 #endif
81 reset_last_Java_frame(true, true);
82 maybe_isb();
83
84 // check for pending exceptions
85 { Label L;
86 // check for pending exceptions (java_thread is set upon return)
87 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
88 cbz(rscratch1, L);
89 // exception pending => remove activation and forward to exception handler
90 // make sure that the vm_results are cleared
91 if (oop_result1->is_valid()) {
92 str(zr, Address(rthread, JavaThread::vm_result_offset()));
93 }
94 if (metadata_result->is_valid()) {
95 str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
96 }
97 if (frame_size() == no_frame_size) {
98 leave();
99 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
100 } else if (_stub_id == Runtime1::forward_exception_id) {
101 should_not_reach_here();
102 } else {
103 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
104 }
105 bind(L);
106 }
107 // get oop results if there are any and reset the values in the thread
108 if (oop_result1->is_valid()) {
109 get_vm_result(oop_result1, rthread);
110 }
111 if (metadata_result->is_valid()) {
112 get_vm_result_2(metadata_result, rthread);
113 }
114 return call_offset;
115 }
116
117
118 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
119 mov(c_rarg1, arg1);
120 return call_RT(oop_result1, metadata_result, entry, 1);
121 }
122
123
124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
125 if (c_rarg1 == arg2) {
126 if (c_rarg2 == arg1) {
127 mov(rscratch1, arg1);
128 mov(arg1, arg2);
129 mov(arg2, rscratch1);
130 } else {
131 mov(c_rarg2, arg2);
132 mov(c_rarg1, arg1);
133 }
134 } else {
135 mov(c_rarg1, arg1);
136 mov(c_rarg2, arg2);
137 }
138 return call_RT(oop_result1, metadata_result, entry, 2);
139 }
140
141
142 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
143 // if there is any conflict use the stack
144 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
145 arg2 == c_rarg1 || arg1 == c_rarg3 ||
146 arg3 == c_rarg1 || arg1 == c_rarg2) {
147 stp(arg3, arg2, Address(pre(sp, 2 * wordSize)));
148 stp(arg1, zr, Address(pre(sp, -2 * wordSize)));
149 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize)));
150 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize)));
151 } else {
152 mov(c_rarg1, arg1);
153 mov(c_rarg2, arg2);
154 mov(c_rarg3, arg3);
155 }
156 return call_RT(oop_result1, metadata_result, entry, 3);
157 }
158
159 // Implementation of StubFrame
160
161 class StubFrame: public StackObj {
162 private:
163 StubAssembler* _sasm;
164
165 public:
166 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
167 void load_argument(int offset_in_words, Register reg);
168
169 ~StubFrame();
170 };;
171
172
173 #define __ _sasm->
174
175 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
176 _sasm = sasm;
177 __ set_info(name, must_gc_arguments);
178 __ enter();
179 }
180
181 // load parameters that were stored with LIR_Assembler::store_parameter
182 // Note: offsets for store_parameter and load_argument must match
183 void StubFrame::load_argument(int offset_in_words, Register reg) {
184 // rbp, + 0: link
185 // + 1: return address
186 // + 2: argument with offset 0
187 // + 3: argument with offset 1
188 // + 4: ...
189
190 __ ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord));
191 }
192
193
194 StubFrame::~StubFrame() {
195 __ leave();
196 __ ret(lr);
197 }
198
199 #undef __
200
201
202 // Implementation of Runtime1
203
204 #define __ sasm->
205
206 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
207
208 // Stack layout for saving/restoring all the registers needed during a runtime
209 // call (this includes deoptimization)
210 // Note: note that users of this frame may well have arguments to some runtime
211 // while these values are on the stack. These positions neglect those arguments
212 // but the code in save_live_registers will take the argument count into
213 // account.
214 //
215
216 enum reg_save_layout {
217 reg_save_frame_size = 32 /* float */ + 32 /* integer */
218 };
219
220 // Save off registers which might be killed by calls into the runtime.
221 // Tries to smart of about FP registers. In particular we separate
222 // saving and describing the FPU registers for deoptimization since we
223 // have to save the FPU registers twice if we describe them. The
224 // deopt blob is the only thing which needs to describe FPU registers.
225 // In all other cases it should be sufficient to simply save their
226 // current value.
227
228 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
229 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
230 static int reg_save_size_in_words;
231 static int frame_size_in_bytes = -1;
232
233 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
234 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord;
235 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
236 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
237 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
238
239 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
240 Register r = as_Register(i);
241 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) {
242 int sp_offset = cpu_reg_save_offsets[i];
243 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
244 r->as_VMReg());
245 }
246 }
247
248 if (save_fpu_registers) {
249 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
250 FloatRegister r = as_FloatRegister(i);
251 {
252 int sp_offset = fpu_reg_save_offsets[i];
253 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
254 r->as_VMReg());
255 }
256 }
257 }
258 return oop_map;
259 }
260
261 static OopMap* save_live_registers(StubAssembler* sasm,
262 bool save_fpu_registers = true) {
263 __ block_comment("save_live_registers");
264
265 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp
266
267 if (save_fpu_registers) {
268 for (int i = 30; i >= 0; i -= 2)
269 __ stpd(as_FloatRegister(i), as_FloatRegister(i+1),
270 Address(__ pre(sp, -2 * wordSize)));
271 } else {
272 __ add(sp, sp, -32 * wordSize);
273 }
274
275 return generate_oop_map(sasm, save_fpu_registers);
276 }
277
278 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
279 if (restore_fpu_registers) {
280 for (int i = 0; i < 32; i += 2)
281 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
282 Address(__ post(sp, 2 * wordSize)));
283 } else {
284 __ add(sp, sp, 32 * wordSize);
285 }
286
287 __ pop(RegSet::range(r0, r29), sp);
288 }
289
290 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) {
291
292 if (restore_fpu_registers) {
293 for (int i = 0; i < 32; i += 2)
294 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
295 Address(__ post(sp, 2 * wordSize)));
296 } else {
297 __ add(sp, sp, 32 * wordSize);
298 }
299
300 __ ldp(zr, r1, Address(__ post(sp, 16)));
301 __ pop(RegSet::range(r2, r29), sp);
302 }
303
304
305
306 void Runtime1::initialize_pd() {
307 int i;
308 int sp_offset = 0;
309
310 // all float registers are saved explicitly
311 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
312 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
313 fpu_reg_save_offsets[i] = sp_offset;
314 sp_offset += 2; // SP offsets are in halfwords
315 }
316
317 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
318 Register r = as_Register(i);
319 cpu_reg_save_offsets[i] = sp_offset;
320 sp_offset += 2; // SP offsets are in halfwords
321 }
322 }
323
324
325 // target: the entry point of the method that creates and posts the exception oop
326 // has_argument: true if the exception needs an argument (passed in rscratch1)
327
328 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
329 // make a frame and preserve the caller's caller-save registers
330 OopMap* oop_map = save_live_registers(sasm);
331 int call_offset;
332 if (!has_argument) {
333 call_offset = __ call_RT(noreg, noreg, target);
334 } else {
335 call_offset = __ call_RT(noreg, noreg, target, rscratch1);
336 }
337 OopMapSet* oop_maps = new OopMapSet();
338 oop_maps->add_gc_map(call_offset, oop_map);
339
340 __ should_not_reach_here();
341 return oop_maps;
342 }
343
344
345 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
346 __ block_comment("generate_handle_exception");
347
348 // incoming parameters
349 const Register exception_oop = r0;
350 const Register exception_pc = r3;
351 // other registers used in this stub
352
353 // Save registers, if required.
354 OopMapSet* oop_maps = new OopMapSet();
355 OopMap* oop_map = NULL;
356 switch (id) {
357 case forward_exception_id:
358 // We're handling an exception in the context of a compiled frame.
359 // The registers have been saved in the standard places. Perform
360 // an exception lookup in the caller and dispatch to the handler
361 // if found. Otherwise unwind and dispatch to the callers
362 // exception handler.
363 oop_map = generate_oop_map(sasm, 1 /*thread*/);
364
365 // load and clear pending exception oop into r0
366 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset()));
367 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
368
369 // load issuing PC (the return address for this stub) into r3
370 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord));
371
372 // make sure that the vm_results are cleared (may be unnecessary)
373 __ str(zr, Address(rthread, JavaThread::vm_result_offset()));
374 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
375 break;
376 case handle_exception_nofpu_id:
377 case handle_exception_id:
378 // At this point all registers MAY be live.
379 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id);
380 break;
381 case handle_exception_from_callee_id: {
382 // At this point all registers except exception oop (r0) and
383 // exception pc (lr) are dead.
384 const int frame_size = 2 /*fp, return address*/;
385 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
386 sasm->set_frame_size(frame_size);
387 break;
388 }
389 default:
390 __ should_not_reach_here();
391 break;
392 }
393
394 // verify that only r0 and r3 are valid at this time
395 __ invalidate_registers(false, true, true, false, true, true);
396 // verify that r0 contains a valid exception
397 __ verify_not_null_oop(exception_oop);
398
399 #ifdef ASSERT
400 // check that fields in JavaThread for exception oop and issuing pc are
401 // empty before writing to them
402 Label oop_empty;
403 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
404 __ cbz(rscratch1, oop_empty);
405 __ stop("exception oop already set");
406 __ bind(oop_empty);
407
408 Label pc_empty;
409 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
410 __ cbz(rscratch1, pc_empty);
411 __ stop("exception pc already set");
412 __ bind(pc_empty);
413 #endif
414
415 // save exception oop and issuing pc into JavaThread
416 // (exception handler will load it from here)
417 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset()));
418 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset()));
419
420 // patch throwing pc into return address (has bci & oop map)
421 __ str(exception_pc, Address(rfp, 1*BytesPerWord));
422
423 // compute the exception handler.
424 // the exception oop and the throwing pc are read from the fields in JavaThread
425 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
426 oop_maps->add_gc_map(call_offset, oop_map);
427
428 // r0: handler address
429 // will be the deopt blob if nmethod was deoptimized while we looked up
430 // handler regardless of whether handler existed in the nmethod.
431
432 // only r0 is valid at this time, all other registers have been destroyed by the runtime call
433 __ invalidate_registers(false, true, true, true, true, true);
434
435 // patch the return address, this stub will directly return to the exception handler
436 __ str(r0, Address(rfp, 1*BytesPerWord));
437
438 switch (id) {
439 case forward_exception_id:
440 case handle_exception_nofpu_id:
441 case handle_exception_id:
442 // Restore the registers that were saved at the beginning.
443 restore_live_registers(sasm, id != handle_exception_nofpu_id);
444 break;
445 case handle_exception_from_callee_id:
446 // Pop the return address since we are possibly changing SP (restoring from BP).
447 __ leave();
448
449 // Restore SP from FP if the exception PC is a method handle call site.
450 {
451 Label nope;
452 __ ldrw(rscratch1, Address(rthread, JavaThread::is_method_handle_return_offset()));
453 __ cbzw(rscratch1, nope);
454 __ mov(sp, rfp);
455 __ bind(nope);
456 }
457
458 __ ret(lr); // jump to exception handler
459 break;
460 default: ShouldNotReachHere();
461 }
462
463 return oop_maps;
464 }
465
466
467 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
468 // incoming parameters
469 const Register exception_oop = r0;
470 // callee-saved copy of exception_oop during runtime call
471 const Register exception_oop_callee_saved = r19;
472 // other registers used in this stub
473 const Register exception_pc = r3;
474 const Register handler_addr = r1;
475
476 // verify that only r0, is valid at this time
477 __ invalidate_registers(false, true, true, true, true, true);
478
479 #ifdef ASSERT
480 // check that fields in JavaThread for exception oop and issuing pc are empty
481 Label oop_empty;
482 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
483 __ cbz(rscratch1, oop_empty);
484 __ stop("exception oop must be empty");
485 __ bind(oop_empty);
486
487 Label pc_empty;
488 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
489 __ cbz(rscratch1, pc_empty);
490 __ stop("exception pc must be empty");
491 __ bind(pc_empty);
492 #endif
493
494 // Save our return address because
495 // exception_handler_for_return_address will destroy it. We also
496 // save exception_oop
497 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize)));
498
499 // search the exception handler address of the caller (using the return address)
500 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr);
501 // r0: exception handler address of the caller
502
503 // Only R0 is valid at this time; all other registers have been
504 // destroyed by the call.
505 __ invalidate_registers(false, true, true, true, false, true);
506
507 // move result of call into correct register
508 __ mov(handler_addr, r0);
509
510 // get throwing pc (= return address).
511 // lr has been destroyed by the call
512 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize)));
513 __ mov(r3, lr);
514
515 __ verify_not_null_oop(exception_oop);
516
517 {
518 Label foo;
519 __ ldrw(rscratch1, Address(rthread, JavaThread::is_method_handle_return_offset()));
520 __ cbzw(rscratch1, foo);
521 __ mov(sp, rfp);
522 __ bind(foo);
523 }
524
525 // continue at exception handler (return address removed)
526 // note: do *not* remove arguments when unwinding the
527 // activation since the caller assumes having
528 // all arguments on the stack when entering the
529 // runtime to determine the exception handler
530 // (GC happens at call site with arguments!)
531 // r0: exception oop
532 // r3: throwing pc
533 // r1: exception handler
534 __ br(handler_addr);
535 }
536
537
538
539 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
540 // use the maximum number of runtime-arguments here because it is difficult to
541 // distinguish each RT-Call.
542 // Note: This number affects also the RT-Call in generate_handle_exception because
543 // the oop-map is shared for all calls.
544 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
545 assert(deopt_blob != NULL, "deoptimization blob must have been created");
546
547 OopMap* oop_map = save_live_registers(sasm);
548
549 __ mov(c_rarg0, rthread);
550 Label retaddr;
551 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1);
552 // do the call
553 __ lea(rscratch1, RuntimeAddress(target));
554 __ blrt(rscratch1, 1, 0, 1);
555 __ bind(retaddr);
556 OopMapSet* oop_maps = new OopMapSet();
557 oop_maps->add_gc_map(__ offset(), oop_map);
558 // verify callee-saved register
559 #ifdef ASSERT
560 { Label L;
561 __ get_thread(rscratch1);
562 __ cmp(rthread, rscratch1);
563 __ br(Assembler::EQ, L);
564 __ stop("StubAssembler::call_RT: rthread not callee saved?");
565 __ bind(L);
566 }
567 #endif
568 __ reset_last_Java_frame(true, false);
569 __ maybe_isb();
570
571 // check for pending exceptions
572 { Label L;
573 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
574 __ cbz(rscratch1, L);
575 // exception pending => remove activation and forward to exception handler
576
577 { Label L1;
578 __ cbnz(r0, L1); // have we deoptimized?
579 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
580 __ bind(L1);
581 }
582
583 // the deopt blob expects exceptions in the special fields of
584 // JavaThread, so copy and clear pending exception.
585
586 // load and clear pending exception
587 __ ldr(r0, Address(rthread, Thread::pending_exception_offset()));
588 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
589
590 // check that there is really a valid exception
591 __ verify_not_null_oop(r0);
592
593 // load throwing pc: this is the return address of the stub
594 __ mov(r3, lr);
595
596 #ifdef ASSERT
597 // check that fields in JavaThread for exception oop and issuing pc are empty
598 Label oop_empty;
599 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
600 __ cbz(rscratch1, oop_empty);
601 __ stop("exception oop must be empty");
602 __ bind(oop_empty);
603
604 Label pc_empty;
605 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
606 __ cbz(rscratch1, pc_empty);
607 __ stop("exception pc must be empty");
608 __ bind(pc_empty);
609 #endif
610
611 // store exception oop and throwing pc to JavaThread
612 __ str(r0, Address(rthread, JavaThread::exception_oop_offset()));
613 __ str(r3, Address(rthread, JavaThread::exception_pc_offset()));
614
615 restore_live_registers(sasm);
616
617 __ leave();
618
619 // Forward the exception directly to deopt blob. We can blow no
620 // registers and must leave throwing pc on the stack. A patch may
621 // have values live in registers so the entry point with the
622 // exception in tls.
623 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
624
625 __ bind(L);
626 }
627
628
629 // Runtime will return true if the nmethod has been deoptimized during
630 // the patching process. In that case we must do a deopt reexecute instead.
631
632 Label reexecuteEntry, cont;
633
634 __ cbz(r0, cont); // have we deoptimized?
635
636 // Will reexecute. Proper return address is already on the stack we just restore
637 // registers, pop all of our frame but the return address and jump to the deopt blob
638 restore_live_registers(sasm);
639 __ leave();
640 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
641
642 __ bind(cont);
643 restore_live_registers(sasm);
644 __ leave();
645 __ ret(lr);
646
647 return oop_maps;
648 }
649
650
651 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
652
653 const Register exception_oop = r0;
654 const Register exception_pc = r3;
655
656 // for better readability
657 const bool must_gc_arguments = true;
658 const bool dont_gc_arguments = false;
659
660 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
661 bool save_fpu_registers = true;
662
663 // stub code & info for the different stubs
664 OopMapSet* oop_maps = NULL;
665 OopMap* oop_map = NULL;
666 switch (id) {
667 {
668 case forward_exception_id:
669 {
670 oop_maps = generate_handle_exception(id, sasm);
671 __ leave();
672 __ ret(lr);
673 }
674 break;
675
676 case throw_div0_exception_id:
677 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
678 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
679 }
680 break;
681
682 case throw_null_pointer_exception_id:
683 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
684 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
685 }
686 break;
687
688 case new_instance_id:
689 case fast_new_instance_id:
690 case fast_new_instance_init_check_id:
691 {
692 Register klass = r3; // Incoming
693 Register obj = r0; // Result
694
695 if (id == new_instance_id) {
696 __ set_info("new_instance", dont_gc_arguments);
697 } else if (id == fast_new_instance_id) {
698 __ set_info("fast new_instance", dont_gc_arguments);
699 } else {
700 assert(id == fast_new_instance_init_check_id, "bad StubID");
701 __ set_info("fast new_instance init check", dont_gc_arguments);
702 }
703
704 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
705 UseTLAB && FastTLABRefill) {
706 Label slow_path;
707 Register obj_size = r2;
708 Register t1 = r19;
709 Register t2 = r4;
710 assert_different_registers(klass, obj, obj_size, t1, t2);
711
712 __ stp(r5, r19, Address(__ pre(sp, -2 * wordSize)));
713
714 if (id == fast_new_instance_init_check_id) {
715 // make sure the klass is initialized
716 __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset()));
717 __ cmpw(rscratch1, InstanceKlass::fully_initialized);
718 __ br(Assembler::NE, slow_path);
719 }
720
721 #ifdef ASSERT
722 // assert object can be fast path allocated
723 {
724 Label ok, not_ok;
725 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
726 __ cmp(obj_size, 0u);
727 __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0)
728 __ tstw(obj_size, Klass::_lh_instance_slow_path_bit);
729 __ br(Assembler::EQ, ok);
730 __ bind(not_ok);
731 __ stop("assert(can be fast path allocated)");
732 __ should_not_reach_here();
733 __ bind(ok);
734 }
735 #endif // ASSERT
736
737 // if we got here then the TLAB allocation failed, so try
738 // refilling the TLAB or allocating directly from eden.
739 Label retry_tlab, try_eden;
740 __ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy r3 (klass), returns r5
741
742 __ bind(retry_tlab);
743
744 // get the instance size (size is postive so movl is fine for 64bit)
745 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
746
747 __ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path);
748
749 __ initialize_object(obj, klass, obj_size, 0, t1, t2);
750 __ verify_oop(obj);
751 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
752 __ ret(lr);
753
754 __ bind(try_eden);
755 // get the instance size (size is postive so movl is fine for 64bit)
756 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
757
758 __ eden_allocate(obj, obj_size, 0, t1, slow_path);
759 __ incr_allocated_bytes(rthread, obj_size, 0, rscratch1);
760
761 __ initialize_object(obj, klass, obj_size, 0, t1, t2);
762 __ verify_oop(obj);
763 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
764 __ ret(lr);
765
766 __ bind(slow_path);
767 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize)));
768 }
769
770 __ enter();
771 OopMap* map = save_live_registers(sasm);
772 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
773 oop_maps = new OopMapSet();
774 oop_maps->add_gc_map(call_offset, map);
775 restore_live_registers_except_r0(sasm);
776 __ verify_oop(obj);
777 __ leave();
778 __ ret(lr);
779
780 // r0,: new instance
781 }
782
783 break;
784
785 case counter_overflow_id:
786 {
787 Register bci = r0, method = r1;
788 __ enter();
789 OopMap* map = save_live_registers(sasm);
790 // Retrieve bci
791 __ ldrw(bci, Address(rfp, 2*BytesPerWord));
792 // And a pointer to the Method*
793 __ ldr(method, Address(rfp, 3*BytesPerWord));
794 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
795 oop_maps = new OopMapSet();
796 oop_maps->add_gc_map(call_offset, map);
797 restore_live_registers(sasm);
798 __ leave();
799 __ ret(lr);
800 }
801 break;
802
803 case new_type_array_id:
804 case new_object_array_id:
805 {
806 Register length = r19; // Incoming
807 Register klass = r3; // Incoming
808 Register obj = r0; // Result
809
810 if (id == new_type_array_id) {
811 __ set_info("new_type_array", dont_gc_arguments);
812 } else {
813 __ set_info("new_object_array", dont_gc_arguments);
814 }
815
816 #ifdef ASSERT
817 // assert object type is really an array of the proper kind
818 {
819 Label ok;
820 Register t0 = obj;
821 __ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
822 __ asrw(t0, t0, Klass::_lh_array_tag_shift);
823 int tag = ((id == new_type_array_id)
824 ? Klass::_lh_array_tag_type_value
825 : Klass::_lh_array_tag_obj_value);
826 __ mov(rscratch1, tag);
827 __ cmpw(t0, rscratch1);
828 __ br(Assembler::EQ, ok);
829 __ stop("assert(is an array klass)");
830 __ should_not_reach_here();
831 __ bind(ok);
832 }
833 #endif // ASSERT
834
835 if (UseTLAB && FastTLABRefill) {
836 Register arr_size = r4;
837 Register t1 = r2;
838 Register t2 = r5;
839 Label slow_path;
840 assert_different_registers(length, klass, obj, arr_size, t1, t2);
841
842 // check that array length is small enough for fast path.
843 __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length);
844 __ cmpw(length, rscratch1);
845 __ br(Assembler::HI, slow_path);
846
847 // if we got here then the TLAB allocation failed, so try
848 // refilling the TLAB or allocating directly from eden.
849 Label retry_tlab, try_eden;
850 const Register thread =
851 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves r19 & r3, returns rthread
852
853 __ bind(retry_tlab);
854
855 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
856 // since size is positive ldrw does right thing on 64bit
857 __ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
858 __ lslvw(arr_size, length, t1);
859 __ ubfx(t1, t1, Klass::_lh_header_size_shift,
860 exact_log2(Klass::_lh_header_size_mask + 1));
861 __ add(arr_size, arr_size, t1);
862 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
863 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
864
865 __ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path); // preserves arr_size
866
867 __ initialize_header(obj, klass, length, t1, t2);
868 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
869 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
870 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
871 __ andr(t1, t1, Klass::_lh_header_size_mask);
872 __ sub(arr_size, arr_size, t1); // body length
873 __ add(t1, t1, obj); // body start
874 __ initialize_body(t1, arr_size, 0, t2);
875 __ verify_oop(obj);
876
877 __ ret(lr);
878
879 __ bind(try_eden);
880 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
881 // since size is positive ldrw does right thing on 64bit
882 __ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
883 // since size is postive movw does right thing on 64bit
884 __ movw(arr_size, length);
885 __ lslvw(arr_size, length, t1);
886 __ ubfx(t1, t1, Klass::_lh_header_size_shift,
887 exact_log2(Klass::_lh_header_size_mask + 1));
888 __ add(arr_size, arr_size, t1);
889 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
890 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
891
892 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
893 __ incr_allocated_bytes(thread, arr_size, 0, rscratch1);
894
895 __ initialize_header(obj, klass, length, t1, t2);
896 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
897 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
898 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
899 __ andr(t1, t1, Klass::_lh_header_size_mask);
900 __ sub(arr_size, arr_size, t1); // body length
901 __ add(t1, t1, obj); // body start
902 __ initialize_body(t1, arr_size, 0, t2);
903 __ verify_oop(obj);
904
905 __ ret(lr);
906
907 __ bind(slow_path);
908 }
909
910 __ enter();
911 OopMap* map = save_live_registers(sasm);
912 int call_offset;
913 if (id == new_type_array_id) {
914 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
915 } else {
916 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
917 }
918
919 oop_maps = new OopMapSet();
920 oop_maps->add_gc_map(call_offset, map);
921 restore_live_registers_except_r0(sasm);
922
923 __ verify_oop(obj);
924 __ leave();
925 __ ret(lr);
926
927 // r0: new array
928 }
929 break;
930
931 case new_multi_array_id:
932 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
933 // r0,: klass
934 // r19,: rank
935 // r2: address of 1st dimension
936 OopMap* map = save_live_registers(sasm);
937 __ mov(c_rarg1, r0);
938 __ mov(c_rarg3, r2);
939 __ mov(c_rarg2, r19);
940 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3);
941
942 oop_maps = new OopMapSet();
943 oop_maps->add_gc_map(call_offset, map);
944 restore_live_registers_except_r0(sasm);
945
946 // r0,: new multi array
947 __ verify_oop(r0);
948 }
949 break;
950
951 case register_finalizer_id:
952 {
953 __ set_info("register_finalizer", dont_gc_arguments);
954
955 // This is called via call_runtime so the arguments
956 // will be place in C abi locations
957
958 __ verify_oop(c_rarg0);
959
960 // load the klass and check the has finalizer flag
961 Label register_finalizer;
962 Register t = r5;
963 __ load_klass(t, r0);
964 __ ldrw(t, Address(t, Klass::access_flags_offset()));
965 __ tst(t, JVM_ACC_HAS_FINALIZER);
966 __ br(Assembler::NE, register_finalizer);
967 __ ret(lr);
968
969 __ bind(register_finalizer);
970 __ enter();
971 OopMap* oop_map = save_live_registers(sasm);
972 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0);
973 oop_maps = new OopMapSet();
974 oop_maps->add_gc_map(call_offset, oop_map);
975
976 // Now restore all the live registers
977 restore_live_registers(sasm);
978
979 __ leave();
980 __ ret(lr);
981 }
982 break;
983
984 case throw_class_cast_exception_id:
985 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
986 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
987 }
988 break;
989
990 case throw_incompatible_class_change_error_id:
991 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
992 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
993 }
994 break;
995
996 case slow_subtype_check_id:
997 {
998 // Typical calling sequence:
999 // __ push(klass_RInfo); // object klass or other subclass
1000 // __ push(sup_k_RInfo); // array element klass or other superclass
1001 // __ bl(slow_subtype_check);
1002 // Note that the subclass is pushed first, and is therefore deepest.
1003 enum layout {
1004 r0_off, r0_off_hi,
1005 r2_off, r2_off_hi,
1006 r4_off, r4_off_hi,
1007 r5_off, r5_off_hi,
1008 sup_k_off, sup_k_off_hi,
1009 klass_off, klass_off_hi,
1010 framesize,
1011 result_off = sup_k_off
1012 };
1013
1014 __ set_info("slow_subtype_check", dont_gc_arguments);
1015 __ push(RegSet::of(r0, r2, r4, r5), sp);
1016
1017 // This is called by pushing args and not with C abi
1018 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
1019 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
1020
1021 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size));
1022
1023 Label miss;
1024 __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss);
1025
1026 // fallthrough on success:
1027 __ mov(rscratch1, 1);
1028 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
1029 __ pop(RegSet::of(r0, r2, r4, r5), sp);
1030 __ ret(lr);
1031
1032 __ bind(miss);
1033 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
1034 __ pop(RegSet::of(r0, r2, r4, r5), sp);
1035 __ ret(lr);
1036 }
1037 break;
1038
1039 case monitorenter_nofpu_id:
1040 save_fpu_registers = false;
1041 // fall through
1042 case monitorenter_id:
1043 {
1044 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
1045 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1046
1047 // Called with store_parameter and not C abi
1048
1049 f.load_argument(1, r0); // r0,: object
1050 f.load_argument(0, r1); // r1,: lock address
1051
1052 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1);
1053
1054 oop_maps = new OopMapSet();
1055 oop_maps->add_gc_map(call_offset, map);
1056 restore_live_registers(sasm, save_fpu_registers);
1057 }
1058 break;
1059
1060 case monitorexit_nofpu_id:
1061 save_fpu_registers = false;
1062 // fall through
1063 case monitorexit_id:
1064 {
1065 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1066 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1067
1068 // Called with store_parameter and not C abi
1069
1070 f.load_argument(0, r0); // r0,: lock address
1071
1072 // note: really a leaf routine but must setup last java sp
1073 // => use call_RT for now (speed can be improved by
1074 // doing last java sp setup manually)
1075 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0);
1076
1077 oop_maps = new OopMapSet();
1078 oop_maps->add_gc_map(call_offset, map);
1079 restore_live_registers(sasm, save_fpu_registers);
1080 }
1081 break;
1082
1083 case deoptimize_id:
1084 {
1085 StubFrame f(sasm, "deoptimize", dont_gc_arguments);
1086 OopMap* oop_map = save_live_registers(sasm);
1087 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize));
1088 oop_maps = new OopMapSet();
1089 oop_maps->add_gc_map(call_offset, oop_map);
1090 restore_live_registers(sasm);
1091 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1092 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1093 __ leave();
1094 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1095 }
1096 break;
1097
1098 case throw_range_check_failed_id:
1099 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
1100 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1101 }
1102 break;
1103
1104 case unwind_exception_id:
1105 { __ set_info("unwind_exception", dont_gc_arguments);
1106 // note: no stubframe since we are about to leave the current
1107 // activation and we are calling a leaf VM function only.
1108 generate_unwind_exception(sasm);
1109 }
1110 break;
1111
1112 case access_field_patching_id:
1113 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
1114 // we should set up register map
1115 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1116 }
1117 break;
1118
1119 case load_klass_patching_id:
1120 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
1121 // we should set up register map
1122 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1123 }
1124 break;
1125
1126 case load_mirror_patching_id:
1127 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
1128 // we should set up register map
1129 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1130 }
1131 break;
1132
1133 case load_appendix_patching_id:
1134 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
1135 // we should set up register map
1136 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1137 }
1138 break;
1139
1140 case handle_exception_nofpu_id:
1141 case handle_exception_id:
1142 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1143 oop_maps = generate_handle_exception(id, sasm);
1144 }
1145 break;
1146
1147 case handle_exception_from_callee_id:
1148 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1149 oop_maps = generate_handle_exception(id, sasm);
1150 }
1151 break;
1152
1153 case throw_index_exception_id:
1154 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
1155 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1156 }
1157 break;
1158
1159 case throw_array_store_exception_id:
1160 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
1161 // tos + 0: link
1162 // + 1: return address
1163 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1164 }
1165 break;
1166
1167 #if INCLUDE_ALL_GCS
1168
1169 // Registers to be saved around calls to g1_wb_pre or g1_wb_post
1170 #define G1_SAVE_REGS (RegSet::range(r0, r18) - RegSet::of(rscratch1, rscratch2))
1171
1172 case g1_pre_barrier_slow_id:
1173 {
1174 StubFrame f(sasm, "g1_pre_barrier", dont_gc_arguments);
1175 // arg0 : previous value of memory
1176
1177 BarrierSet* bs = Universe::heap()->barrier_set();
1178 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
1179 __ mov(r0, (int)id);
1180 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1181 __ should_not_reach_here();
1182 break;
1183 }
1184
1185 const Register pre_val = r0;
1186 const Register thread = rthread;
1187 const Register tmp = rscratch1;
1188
1189 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1190 PtrQueue::byte_offset_of_active()));
1191
1192 Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1193 PtrQueue::byte_offset_of_index()));
1194 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1195 PtrQueue::byte_offset_of_buf()));
1196
1197 Label done;
1198 Label runtime;
1199
1200 // Can we store original value in the thread's buffer?
1201 __ ldr(tmp, queue_index);
1202 __ cbz(tmp, runtime);
1203
1204 __ sub(tmp, tmp, wordSize);
1205 __ str(tmp, queue_index);
1206 __ ldr(rscratch2, buffer);
1207 __ add(tmp, tmp, rscratch2);
1208 f.load_argument(0, rscratch2);
1209 __ str(rscratch2, Address(tmp, 0));
1210 __ b(done);
1211
1212 __ bind(runtime);
1213 __ push(G1_SAVE_REGS, sp);
1214 f.load_argument(0, pre_val);
1215 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
1216 __ pop(G1_SAVE_REGS, sp);
1217 __ bind(done);
1218 }
1219 break;
1220 case g1_post_barrier_slow_id:
1221 {
1222 StubFrame f(sasm, "g1_post_barrier", dont_gc_arguments);
1223
1224 // arg0: store_address
1225 Address store_addr(rfp, 2*BytesPerWord);
1226
1227 BarrierSet* bs = Universe::heap()->barrier_set();
1228 CardTableModRefBS* ct = (CardTableModRefBS*)bs;
1229 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
1230
1231 Label done;
1232 Label runtime;
1233
1234 // At this point we know new_value is non-NULL and the new_value crosses regions.
1235 // Must check to see if card is already dirty
1236
1237 const Register thread = rthread;
1238
1239 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
1240 PtrQueue::byte_offset_of_index()));
1241 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
1242 PtrQueue::byte_offset_of_buf()));
1243
1244 const Register card_addr = rscratch2;
1245 ExternalAddress cardtable((address) ct->byte_map_base);
1246
1247 f.load_argument(0, card_addr);
1248 __ lsr(card_addr, card_addr, CardTableModRefBS::card_shift);
1249 unsigned long offset;
1250 __ adrp(rscratch1, cardtable, offset);
1251 __ add(card_addr, card_addr, rscratch1);
1252 __ ldrb(rscratch1, Address(card_addr, offset));
1253 __ cmpw(rscratch1, (int)G1SATBCardTableModRefBS::g1_young_card_val());
1254 __ br(Assembler::EQ, done);
1255
1256 assert((int)CardTableModRefBS::dirty_card_val() == 0, "must be 0");
1257
1258 __ membar(Assembler::StoreLoad);
1259 __ ldrb(rscratch1, Address(card_addr, offset));
1260 __ cbzw(rscratch1, done);
1261
1262 // storing region crossing non-NULL, card is clean.
1263 // dirty card and log.
1264 __ strb(zr, Address(card_addr, offset));
1265
1266 __ ldr(rscratch1, queue_index);
1267 __ cbz(rscratch1, runtime);
1268 __ sub(rscratch1, rscratch1, wordSize);
1269 __ str(rscratch1, queue_index);
1270
1271 const Register buffer_addr = r0;
1272
1273 __ push(RegSet::of(r0, r1), sp);
1274 __ ldr(buffer_addr, buffer);
1275 __ str(card_addr, Address(buffer_addr, rscratch1));
1276 __ pop(RegSet::of(r0, r1), sp);
1277 __ b(done);
1278
1279 __ bind(runtime);
1280 __ push(G1_SAVE_REGS, sp);
1281 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
1282 __ pop(G1_SAVE_REGS, sp);
1283 __ bind(done);
1284
1285 }
1286 break;
1287 #endif
1288
1289 case predicate_failed_trap_id:
1290 {
1291 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
1292
1293 OopMap* map = save_live_registers(sasm);
1294
1295 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1296 oop_maps = new OopMapSet();
1297 oop_maps->add_gc_map(call_offset, map);
1298 restore_live_registers(sasm);
1299 __ leave();
1300 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1301 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1302
1303 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1304 }
1305 break;
1306
1307
1308 default:
1309 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
1310 __ mov(r0, (int)id);
1311 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1312 __ should_not_reach_here();
1313 }
1314 break;
1315 }
1316 }
1317 return oop_maps;
1318 }
1319
1320 #undef __
1321
1322 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }