1 /*
2 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2021, 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 "asm/assembler.hpp"
27 #include "c1/c1_CodeStubs.hpp"
28 #include "c1/c1_Defs.hpp"
29 #include "c1/c1_MacroAssembler.hpp"
30 #include "c1/c1_Runtime1.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "compiler/oopMap.hpp"
33 #include "gc/shared/cardTable.hpp"
34 #include "gc/shared/cardTableBarrierSet.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "gc/shared/tlab_globals.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "memory/universe.hpp"
39 #include "nativeInst_aarch64.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "register_aarch64.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/signature.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/vframe.hpp"
47 #include "runtime/vframeArray.hpp"
48 #include "utilities/powerOfTwo.hpp"
49 #include "vmreg_aarch64.inline.hpp"
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 blr(rscratch1);
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
86 // check for pending exceptions
87 { Label L;
88 // check for pending exceptions (java_thread is set upon return)
89 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
90 cbz(rscratch1, L);
91 // exception pending => remove activation and forward to exception handler
92 // make sure that the vm_results are cleared
93 if (oop_result1->is_valid()) {
94 str(zr, Address(rthread, JavaThread::vm_result_oop_offset()));
95 }
96 if (metadata_result->is_valid()) {
97 str(zr, Address(rthread, JavaThread::vm_result_metadata_offset()));
98 }
99 if (frame_size() == no_frame_size) {
100 leave();
101 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
102 } else if (_stub_id == (int)C1StubId::forward_exception_id) {
103 should_not_reach_here();
104 } else {
105 far_jump(RuntimeAddress(Runtime1::entry_for(C1StubId::forward_exception_id)));
106 }
107 bind(L);
108 }
109 // get oop results if there are any and reset the values in the thread
110 if (oop_result1->is_valid()) {
111 get_vm_result_oop(oop_result1, rthread);
112 }
113 if (metadata_result->is_valid()) {
114 get_vm_result_metadata(metadata_result, rthread);
115 }
116 return call_offset;
117 }
118
119
120 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
121 mov(c_rarg1, arg1);
122 return call_RT(oop_result1, metadata_result, entry, 1);
123 }
124
125
126 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
127 if (c_rarg1 == arg2) {
128 if (c_rarg2 == arg1) {
129 mov(rscratch1, arg1);
130 mov(arg1, arg2);
131 mov(arg2, rscratch1);
132 } else {
133 mov(c_rarg2, arg2);
134 mov(c_rarg1, arg1);
135 }
136 } else {
137 mov(c_rarg1, arg1);
138 mov(c_rarg2, arg2);
139 }
140 return call_RT(oop_result1, metadata_result, entry, 2);
141 }
142
143
144 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
145 // if there is any conflict use the stack
146 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
147 arg2 == c_rarg1 || arg2 == c_rarg3 ||
148 arg3 == c_rarg1 || arg3 == c_rarg2) {
149 stp(arg3, arg2, Address(pre(sp, -2 * wordSize)));
150 stp(arg1, zr, Address(pre(sp, -2 * wordSize)));
151 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize)));
152 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize)));
153 } else {
154 mov(c_rarg1, arg1);
155 mov(c_rarg2, arg2);
156 mov(c_rarg3, arg3);
157 }
158 return call_RT(oop_result1, metadata_result, entry, 3);
159 }
160
161 enum return_state_t {
162 does_not_return, requires_return, requires_pop_epilogue_return
163 };
164
165 // Implementation of StubFrame
166
167 class StubFrame: public StackObj {
168 private:
169 StubAssembler* _sasm;
170 return_state_t _return_state;
171
172 public:
173 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state=requires_return);
174 void load_argument(int offset_in_words, Register reg);
175
176 ~StubFrame();
177 };;
178
179 void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
180 set_info(name, must_gc_arguments);
181 enter();
182 }
183
184 void StubAssembler::epilogue(bool use_pop) {
185 // Avoid using a leave instruction when this frame may
186 // have been frozen, since the current value of rfp
187 // restored from the stub would be invalid. We still
188 // must restore the rfp value saved on enter though.
189 if (use_pop) {
190 ldp(rfp, lr, Address(post(sp, 2 * wordSize)));
191 authenticate_return_address();
192 } else {
193 leave();
194 }
195 ret(lr);
196 }
197
198 #define __ _sasm->
199
200 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state) {
201 _sasm = sasm;
202 _return_state = return_state;
203 __ prologue(name, must_gc_arguments);
204 }
205
206 // load parameters that were stored with LIR_Assembler::store_parameter
207 // Note: offsets for store_parameter and load_argument must match
208 void StubFrame::load_argument(int offset_in_words, Register reg) {
209 __ load_parameter(offset_in_words, reg);
210 }
211
212 StubFrame::~StubFrame() {
213 if (_return_state == does_not_return) {
214 __ should_not_reach_here();
215 } else {
216 __ epilogue(_return_state == requires_pop_epilogue_return);
217 }
218 }
219
220 #undef __
221
222
223 // Implementation of Runtime1
224
225 #define __ sasm->
226
227 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
228
229 // Stack layout for saving/restoring all the registers needed during a runtime
230 // call (this includes deoptimization)
231 // Note: note that users of this frame may well have arguments to some runtime
232 // while these values are on the stack. These positions neglect those arguments
233 // but the code in save_live_registers will take the argument count into
234 // account.
235 //
236
237 enum reg_save_layout {
238 reg_save_frame_size = 32 /* float */ + 32 /* integer */
239 };
240
241 // Save off registers which might be killed by calls into the runtime.
242 // Tries to smart of about FP registers. In particular we separate
243 // saving and describing the FPU registers for deoptimization since we
244 // have to save the FPU registers twice if we describe them. The
245 // deopt blob is the only thing which needs to describe FPU registers.
246 // In all other cases it should be sufficient to simply save their
247 // current value.
248
249 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
250 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
251 static int reg_save_size_in_words;
252 static int frame_size_in_bytes = -1;
253
254 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
255 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord;
256 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
257 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
258 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
259
260 for (int i = 0; i < FrameMap::nof_caller_save_cpu_regs(); i++) {
261 LIR_Opr opr = FrameMap::caller_save_cpu_reg_at(i);
262 Register r = opr->as_register();
263 int reg_num = r->encoding();
264 int sp_offset = cpu_reg_save_offsets[reg_num];
265 oop_map->set_callee_saved(VMRegImpl::stack2reg(cpu_reg_save_offsets[reg_num]), r->as_VMReg());
266 }
267
268 Register r = rthread;
269 int reg_num = r->encoding();
270 oop_map->set_callee_saved(VMRegImpl::stack2reg(cpu_reg_save_offsets[reg_num]), r->as_VMReg());
271
272 if (save_fpu_registers) {
273 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
274 FloatRegister r = as_FloatRegister(i);
275 {
276 int sp_offset = fpu_reg_save_offsets[i];
277 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
278 r->as_VMReg());
279 }
280 }
281 }
282 return oop_map;
283 }
284
285 static OopMap* save_live_registers(StubAssembler* sasm,
286 bool save_fpu_registers = true) {
287 __ block_comment("save_live_registers");
288
289 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp
290
291 if (save_fpu_registers) {
292 for (int i = 31; i>= 0; i -= 4) {
293 __ sub(sp, sp, 4 * wordSize); // no pre-increment for st1. Emulate it without modifying other registers
294 __ st1(as_FloatRegister(i-3), as_FloatRegister(i-2), as_FloatRegister(i-1),
295 as_FloatRegister(i), __ T1D, Address(sp));
296 }
297 } else {
298 __ add(sp, sp, -32 * wordSize);
299 }
300
301 return generate_oop_map(sasm, save_fpu_registers);
302 }
303
304 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
305 if (restore_fpu_registers) {
306 for (int i = 0; i < 32; i += 4)
307 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2),
308 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize)));
309 } else {
310 __ add(sp, sp, 32 * wordSize);
311 }
312
313 __ pop(RegSet::range(r0, r29), sp);
314 }
315
316 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) {
317
318 if (restore_fpu_registers) {
319 for (int i = 0; i < 32; i += 4)
320 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2),
321 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize)));
322 } else {
323 __ add(sp, sp, 32 * wordSize);
324 }
325
326 __ ldp(zr, r1, Address(__ post(sp, 16)));
327 __ pop(RegSet::range(r2, r29), sp);
328 }
329
330
331
332 void Runtime1::initialize_pd() {
333 int i;
334 int sp_offset = 0;
335
336 // all float registers are saved explicitly
337 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
338 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
339 fpu_reg_save_offsets[i] = sp_offset;
340 sp_offset += 2; // SP offsets are in halfwords
341 }
342
343 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
344 Register r = as_Register(i);
345 cpu_reg_save_offsets[i] = sp_offset;
346 sp_offset += 2; // SP offsets are in halfwords
347 }
348 }
349
350 // return: offset in 64-bit words.
351 uint Runtime1::runtime_blob_current_thread_offset(frame f) {
352 CodeBlob* cb = f.cb();
353 assert(cb == Runtime1::blob_for(C1StubId::monitorenter_id) ||
354 cb == Runtime1::blob_for(C1StubId::monitorenter_nofpu_id), "must be");
355 assert(cb != nullptr && cb->is_runtime_stub(), "invalid frame");
356 int offset = cpu_reg_save_offsets[rthread->encoding()];
357 return offset / 2; // SP offsets are in halfwords
358 }
359
360 // target: the entry point of the method that creates and posts the exception oop
361 // has_argument: true if the exception needs arguments (passed in rscratch1 and rscratch2)
362
363 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
364 // make a frame and preserve the caller's caller-save registers
365 OopMap* oop_map = save_live_registers(sasm);
366 int call_offset;
367 if (!has_argument) {
368 call_offset = __ call_RT(noreg, noreg, target);
369 } else {
370 __ mov(c_rarg1, rscratch1);
371 __ mov(c_rarg2, rscratch2);
372 call_offset = __ call_RT(noreg, noreg, target);
373 }
374 OopMapSet* oop_maps = new OopMapSet();
375 oop_maps->add_gc_map(call_offset, oop_map);
376 return oop_maps;
377 }
378
379
380 OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm) {
381 __ block_comment("generate_handle_exception");
382
383 // incoming parameters
384 const Register exception_oop = r0;
385 const Register exception_pc = r3;
386 // other registers used in this stub
387
388 // Save registers, if required.
389 OopMapSet* oop_maps = new OopMapSet();
390 OopMap* oop_map = nullptr;
391 switch (id) {
392 case C1StubId::forward_exception_id:
393 // We're handling an exception in the context of a compiled frame.
394 // The registers have been saved in the standard places. Perform
395 // an exception lookup in the caller and dispatch to the handler
396 // if found. Otherwise unwind and dispatch to the callers
397 // exception handler.
398 oop_map = generate_oop_map(sasm, 1 /*thread*/);
399
400 // load and clear pending exception oop into r0
401 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset()));
402 __ str(zr, Address(rthread, Thread::pending_exception_offset()));
403
404 // load issuing PC (the return address for this stub) into r3
405 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord));
406 __ authenticate_return_address(exception_pc);
407
408 // make sure that the vm_results are cleared (may be unnecessary)
409 __ str(zr, Address(rthread, JavaThread::vm_result_oop_offset()));
410 __ str(zr, Address(rthread, JavaThread::vm_result_metadata_offset()));
411 break;
412 case C1StubId::handle_exception_nofpu_id:
413 case C1StubId::handle_exception_id:
414 // At this point all registers MAY be live.
415 oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id);
416 break;
417 case C1StubId::handle_exception_from_callee_id: {
418 // At this point all registers except exception oop (r0) and
419 // exception pc (lr) are dead.
420 const int frame_size = 2 /*fp, return address*/;
421 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
422 sasm->set_frame_size(frame_size);
423 break;
424 }
425 default: ShouldNotReachHere();
426 }
427
428 // verify that only r0 and r3 are valid at this time
429 __ invalidate_registers(false, true, true, false, true, true);
430 // verify that r0 contains a valid exception
431 __ verify_not_null_oop(exception_oop);
432
433 #ifdef ASSERT
434 // check that fields in JavaThread for exception oop and issuing pc are
435 // empty before writing to them
436 Label oop_empty;
437 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
438 __ cbz(rscratch1, oop_empty);
439 __ stop("exception oop already set");
440 __ bind(oop_empty);
441
442 Label pc_empty;
443 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
444 __ cbz(rscratch1, pc_empty);
445 __ stop("exception pc already set");
446 __ bind(pc_empty);
447 #endif
448
449 // save exception oop and issuing pc into JavaThread
450 // (exception handler will load it from here)
451 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset()));
452 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset()));
453
454 // patch throwing pc into return address (has bci & oop map)
455 __ protect_return_address(exception_pc);
456 __ str(exception_pc, Address(rfp, 1*BytesPerWord));
457
458 // compute the exception handler.
459 // the exception oop and the throwing pc are read from the fields in JavaThread
460 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
461 oop_maps->add_gc_map(call_offset, oop_map);
462
463 // r0: handler address
464 // will be the deopt blob if nmethod was deoptimized while we looked up
465 // handler regardless of whether handler existed in the nmethod.
466
467 // only r0 is valid at this time, all other registers have been destroyed by the runtime call
468 __ invalidate_registers(false, true, true, true, true, true);
469
470 // patch the return address, this stub will directly return to the exception handler
471 __ protect_return_address(r0);
472 __ str(r0, Address(rfp, 1*BytesPerWord));
473
474 switch (id) {
475 case C1StubId::forward_exception_id:
476 case C1StubId::handle_exception_nofpu_id:
477 case C1StubId::handle_exception_id:
478 // Restore the registers that were saved at the beginning.
479 restore_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id);
480 break;
481 case C1StubId::handle_exception_from_callee_id:
482 break;
483 default: ShouldNotReachHere();
484 }
485
486 return oop_maps;
487 }
488
489
490 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
491 // incoming parameters
492 const Register exception_oop = r0;
493 // callee-saved copy of exception_oop during runtime call
494 const Register exception_oop_callee_saved = r19;
495 // other registers used in this stub
496 const Register exception_pc = r3;
497 const Register handler_addr = r1;
498
499 if (AbortVMOnException) {
500 __ mov(rscratch1, exception_oop);
501 __ enter();
502 save_live_registers(sasm);
503 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), rscratch1);
504 restore_live_registers(sasm);
505 __ leave();
506 }
507
508 // verify that only r0, is valid at this time
509 __ invalidate_registers(false, true, true, true, true, true);
510
511 #ifdef ASSERT
512 // check that fields in JavaThread for exception oop and issuing pc are empty
513 Label oop_empty;
514 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
515 __ cbz(rscratch1, oop_empty);
516 __ stop("exception oop must be empty");
517 __ bind(oop_empty);
518
519 Label pc_empty;
520 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
521 __ cbz(rscratch1, pc_empty);
522 __ stop("exception pc must be empty");
523 __ bind(pc_empty);
524 #endif
525
526 // Save our return address because
527 // exception_handler_for_return_address will destroy it. We also
528 // save exception_oop
529 __ mov(r3, lr);
530 __ protect_return_address();
531 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize)));
532
533 // search the exception handler address of the caller (using the return address)
534 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, r3);
535 // r0: exception handler address of the caller
536
537 // Only R0 is valid at this time; all other registers have been
538 // destroyed by the call.
539 __ invalidate_registers(false, true, true, true, false, true);
540
541 // move result of call into correct register
542 __ mov(handler_addr, r0);
543
544 // get throwing pc (= return address).
545 // lr has been destroyed by the call
546 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize)));
547 __ authenticate_return_address();
548 __ mov(r3, lr);
549
550 __ verify_not_null_oop(exception_oop);
551
552 // continue at exception handler (return address removed)
553 // note: do *not* remove arguments when unwinding the
554 // activation since the caller assumes having
555 // all arguments on the stack when entering the
556 // runtime to determine the exception handler
557 // (GC happens at call site with arguments!)
558 // r0: exception oop
559 // r3: throwing pc
560 // r1: exception handler
561 __ br(handler_addr);
562 }
563
564
565
566 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
567 // use the maximum number of runtime-arguments here because it is difficult to
568 // distinguish each RT-Call.
569 // Note: This number affects also the RT-Call in generate_handle_exception because
570 // the oop-map is shared for all calls.
571 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
572 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
573
574 OopMap* oop_map = save_live_registers(sasm);
575
576 __ mov(c_rarg0, rthread);
577 Label retaddr;
578 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1);
579 // do the call
580 __ lea(rscratch1, RuntimeAddress(target));
581 __ blr(rscratch1);
582 __ bind(retaddr);
583 OopMapSet* oop_maps = new OopMapSet();
584 oop_maps->add_gc_map(__ offset(), oop_map);
585 // verify callee-saved register
586 #ifdef ASSERT
587 { Label L;
588 __ get_thread(rscratch1);
589 __ cmp(rthread, rscratch1);
590 __ br(Assembler::EQ, L);
591 __ stop("StubAssembler::call_RT: rthread not callee saved?");
592 __ bind(L);
593 }
594 #endif
595
596 __ reset_last_Java_frame(true);
597
598 #ifdef ASSERT
599 // check that fields in JavaThread for exception oop and issuing pc are empty
600 Label oop_empty;
601 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
602 __ cbz(rscratch1, oop_empty);
603 __ stop("exception oop must be empty");
604 __ bind(oop_empty);
605
606 Label pc_empty;
607 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
608 __ cbz(rscratch1, pc_empty);
609 __ stop("exception pc must be empty");
610 __ bind(pc_empty);
611 #endif
612
613 // Runtime will return true if the nmethod has been deoptimized, this is the
614 // expected scenario and anything else is an error. Note that we maintain a
615 // check on the result purely as a defensive measure.
616 Label no_deopt;
617 __ cbz(r0, no_deopt); // Have we deoptimized?
618
619 // Perform a re-execute. The proper return address is already on the stack,
620 // we just need to restore registers, pop all of our frame but the return
621 // address and jump to the deopt blob.
622 restore_live_registers(sasm);
623 __ leave();
624 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
625
626 __ bind(no_deopt);
627 __ stop("deopt not performed");
628
629 return oop_maps;
630 }
631
632
633 OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) {
634
635 const Register exception_oop = r0;
636 const Register exception_pc = r3;
637
638 // for better readability
639 const bool must_gc_arguments = true;
640 const bool dont_gc_arguments = false;
641
642 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
643 bool save_fpu_registers = true;
644
645 // stub code & info for the different stubs
646 OopMapSet* oop_maps = nullptr;
647 OopMap* oop_map = nullptr;
648 switch (id) {
649 {
650 case C1StubId::forward_exception_id:
651 {
652 oop_maps = generate_handle_exception(id, sasm);
653 __ leave();
654 __ ret(lr);
655 }
656 break;
657
658 case C1StubId::throw_div0_exception_id:
659 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return);
660 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
661 }
662 break;
663
664 case C1StubId::throw_null_pointer_exception_id:
665 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return);
666 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
667 }
668 break;
669
670 case C1StubId::new_instance_id:
671 case C1StubId::fast_new_instance_id:
672 case C1StubId::fast_new_instance_init_check_id:
673 {
674 Register klass = r3; // Incoming
675 Register obj = r0; // Result
676
677 if (id == C1StubId::new_instance_id) {
678 __ set_info("new_instance", dont_gc_arguments);
679 } else if (id == C1StubId::fast_new_instance_id) {
680 __ set_info("fast new_instance", dont_gc_arguments);
681 } else {
682 assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId");
683 __ set_info("fast new_instance init check", dont_gc_arguments);
684 }
685
686 __ enter();
687 OopMap* map = save_live_registers(sasm);
688 int call_offset;
689 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
690 oop_maps = new OopMapSet();
691 oop_maps->add_gc_map(call_offset, map);
692 restore_live_registers_except_r0(sasm);
693 __ verify_oop(obj);
694 __ leave();
695 __ ret(lr);
696
697 // r0,: new instance
698 }
699
700 break;
701
702 case C1StubId::counter_overflow_id:
703 {
704 Register bci = r0, method = r1;
705 __ enter();
706 OopMap* map = save_live_registers(sasm);
707 // Retrieve bci
708 __ ldrw(bci, Address(rfp, 2*BytesPerWord));
709 // And a pointer to the Method*
710 __ ldr(method, Address(rfp, 3*BytesPerWord));
711 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
712 oop_maps = new OopMapSet();
713 oop_maps->add_gc_map(call_offset, map);
714 restore_live_registers(sasm);
715 __ leave();
716 __ ret(lr);
717 }
718 break;
719
720 case C1StubId::new_type_array_id:
721 case C1StubId::new_object_array_id:
722 case C1StubId::new_null_free_array_id:
723 {
724 Register length = r19; // Incoming
725 Register klass = r3; // Incoming
726 Register obj = r0; // Result
727
728 if (id == C1StubId::new_type_array_id) {
729 __ set_info("new_type_array", dont_gc_arguments);
730 } else if (id == C1StubId::new_object_array_id) {
731 __ set_info("new_object_array", dont_gc_arguments);
732 } else {
733 __ set_info("new_null_free_array", dont_gc_arguments);
734 }
735
736 #ifdef ASSERT
737 // assert object type is really an array of the proper kind
738 {
739 Label ok;
740 Register t0 = obj;
741 __ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
742 __ asrw(t0, t0, Klass::_lh_array_tag_shift);
743 switch (id) {
744 case C1StubId::new_type_array_id:
745 __ cmpw(t0, Klass::_lh_array_tag_type_value);
746 __ br(Assembler::EQ, ok);
747 __ stop("assert(is a type array klass)");
748 break;
749 case C1StubId::new_object_array_id:
750 __ cmpw(t0, Klass::_lh_array_tag_obj_value); // new "[Ljava/lang/Object;"
751 __ br(Assembler::EQ, ok);
752 __ cmpw(t0, Klass::_lh_array_tag_vt_value); // new "[LVT;"
753 __ br(Assembler::EQ, ok);
754 __ stop("assert(is an object or inline type array klass)");
755 break;
756 case C1StubId::new_null_free_array_id:
757 __ cmpw(t0, Klass::_lh_array_tag_vt_value); // the array can be a flat array.
758 __ br(Assembler::EQ, ok);
759 __ cmpw(t0, Klass::_lh_array_tag_obj_value); // the array cannot be a flat array (due to InlineArrayElementMaxFlatSize, etc)
760 __ br(Assembler::EQ, ok);
761 __ stop("assert(is an object or inline type array klass)");
762 break;
763 default: ShouldNotReachHere();
764 }
765 __ should_not_reach_here();
766 __ bind(ok);
767 }
768 #endif // ASSERT
769
770 __ enter();
771 OopMap* map = save_live_registers(sasm);
772 int call_offset;
773 if (id == C1StubId::new_type_array_id) {
774 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
775 } else if (id == C1StubId::new_object_array_id) {
776 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
777 } else {
778 assert(id == C1StubId::new_null_free_array_id, "must be");
779 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_null_free_array), klass, length);
780 }
781
782 oop_maps = new OopMapSet();
783 oop_maps->add_gc_map(call_offset, map);
784 restore_live_registers_except_r0(sasm);
785
786 __ verify_oop(obj);
787 __ leave();
788 __ ret(lr);
789
790 // r0: new array
791 }
792 break;
793
794 case C1StubId::new_multi_array_id:
795 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
796 // r0,: klass
797 // r19,: rank
798 // r2: address of 1st dimension
799 OopMap* map = save_live_registers(sasm);
800 __ mov(c_rarg1, r0);
801 __ mov(c_rarg3, r2);
802 __ mov(c_rarg2, r19);
803 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3);
804
805 oop_maps = new OopMapSet();
806 oop_maps->add_gc_map(call_offset, map);
807 restore_live_registers_except_r0(sasm);
808
809 // r0,: new multi array
810 __ verify_oop(r0);
811 }
812 break;
813
814 case C1StubId::buffer_inline_args_id:
815 case C1StubId::buffer_inline_args_no_receiver_id:
816 {
817 const char* name = (id == C1StubId::buffer_inline_args_id) ?
818 "buffer_inline_args" : "buffer_inline_args_no_receiver";
819 StubFrame f(sasm, name, dont_gc_arguments);
820 OopMap* map = save_live_registers(sasm);
821 Register method = r19; // Incoming
822 address entry = (id == C1StubId::buffer_inline_args_id) ?
823 CAST_FROM_FN_PTR(address, buffer_inline_args) :
824 CAST_FROM_FN_PTR(address, buffer_inline_args_no_receiver);
825 // This is called from a C1 method's scalarized entry point
826 // where r0-r7 may be holding live argument values so we can't
827 // return the result in r0 as the other stubs do. LR is used as
828 // a temporay below to avoid the result being clobbered by
829 // restore_live_registers.
830 int call_offset = __ call_RT(lr, noreg, entry, method);
831 oop_maps = new OopMapSet();
832 oop_maps->add_gc_map(call_offset, map);
833 restore_live_registers(sasm);
834 __ mov(r20, lr);
835 __ verify_oop(r20); // r20: an array of buffered value objects
836 }
837 break;
838
839 case C1StubId::load_flat_array_id:
840 {
841 StubFrame f(sasm, "load_flat_array", dont_gc_arguments);
842 OopMap* map = save_live_registers(sasm);
843
844 // Called with store_parameter and not C abi
845
846 f.load_argument(1, r0); // r0,: array
847 f.load_argument(0, r1); // r1,: index
848 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, load_flat_array), r0, r1);
849
850 // Ensure the stores that initialize the buffer are visible
851 // before any subsequent store that publishes this reference.
852 __ membar(Assembler::StoreStore);
853
854 oop_maps = new OopMapSet();
855 oop_maps->add_gc_map(call_offset, map);
856 restore_live_registers_except_r0(sasm);
857
858 // r0: loaded element at array[index]
859 __ verify_oop(r0);
860 }
861 break;
862
863 case C1StubId::store_flat_array_id:
864 {
865 StubFrame f(sasm, "store_flat_array", dont_gc_arguments);
866 OopMap* map = save_live_registers(sasm, 4);
867
868 // Called with store_parameter and not C abi
869
870 f.load_argument(2, r0); // r0: array
871 f.load_argument(1, r1); // r1: index
872 f.load_argument(0, r2); // r2: value
873 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, store_flat_array), r0, r1, r2);
874
875 oop_maps = new OopMapSet();
876 oop_maps->add_gc_map(call_offset, map);
877 restore_live_registers_except_r0(sasm);
878 }
879 break;
880
881 case C1StubId::substitutability_check_id:
882 {
883 StubFrame f(sasm, "substitutability_check", dont_gc_arguments);
884 OopMap* map = save_live_registers(sasm);
885
886 // Called with store_parameter and not C abi
887
888 f.load_argument(1, r1); // r1,: left
889 f.load_argument(0, r2); // r2,: right
890 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, substitutability_check), r1, r2);
891
892 oop_maps = new OopMapSet();
893 oop_maps->add_gc_map(call_offset, map);
894 restore_live_registers_except_r0(sasm);
895
896 // r0,: are the two operands substitutable
897 }
898 break;
899
900 case C1StubId::register_finalizer_id:
901 {
902 __ set_info("register_finalizer", dont_gc_arguments);
903
904 // This is called via call_runtime so the arguments
905 // will be place in C abi locations
906
907 __ verify_oop(c_rarg0);
908
909 // load the klass and check the has finalizer flag
910 Label register_finalizer;
911 Register t = r5;
912 __ load_klass(t, r0);
913 __ ldrb(t, Address(t, Klass::misc_flags_offset()));
914 __ tbnz(t, exact_log2(KlassFlags::_misc_has_finalizer), register_finalizer);
915 __ ret(lr);
916
917 __ bind(register_finalizer);
918 __ enter();
919 OopMap* oop_map = save_live_registers(sasm);
920 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0);
921 oop_maps = new OopMapSet();
922 oop_maps->add_gc_map(call_offset, oop_map);
923
924 // Now restore all the live registers
925 restore_live_registers(sasm);
926
927 __ leave();
928 __ ret(lr);
929 }
930 break;
931
932 case C1StubId::throw_class_cast_exception_id:
933 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return);
934 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
935 }
936 break;
937
938 case C1StubId::throw_incompatible_class_change_error_id:
939 { StubFrame f(sasm, "throw_incompatible_class_change_error", dont_gc_arguments, does_not_return);
940 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
941 }
942 break;
943
944 case C1StubId::throw_illegal_monitor_state_exception_id:
945 { StubFrame f(sasm, "throw_illegal_monitor_state_exception", dont_gc_arguments);
946 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_illegal_monitor_state_exception), false);
947 }
948 break;
949
950 case C1StubId::throw_identity_exception_id:
951 { StubFrame f(sasm, "throw_identity_exception", dont_gc_arguments);
952 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_identity_exception), true);
953 }
954 break;
955
956 case C1StubId::slow_subtype_check_id:
957 {
958 // Typical calling sequence:
959 // __ push(klass_RInfo); // object klass or other subclass
960 // __ push(sup_k_RInfo); // array element klass or other superclass
961 // __ bl(slow_subtype_check);
962 // Note that the subclass is pushed first, and is therefore deepest.
963 enum layout {
964 r0_off, r0_off_hi,
965 r2_off, r2_off_hi,
966 r4_off, r4_off_hi,
967 r5_off, r5_off_hi,
968 sup_k_off, sup_k_off_hi,
969 klass_off, klass_off_hi,
970 framesize,
971 result_off = sup_k_off
972 };
973
974 __ set_info("slow_subtype_check", dont_gc_arguments);
975 __ push(RegSet::of(r0, r2, r4, r5), sp);
976
977 // This is called by pushing args and not with C abi
978 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
979 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
980
981 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size));
982
983 Label miss;
984 __ check_klass_subtype_slow_path(/*sub_klass*/r4,
985 /*super_klass*/r0,
986 /*temp_reg*/r2,
987 /*temp2_reg*/r5,
988 /*L_success*/nullptr,
989 /*L_failure*/&miss);
990 // Need extras for table lookup: r1, r3, vtemp
991
992 // fallthrough on success:
993 __ mov(rscratch1, 1);
994 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
995 __ pop(RegSet::of(r0, r2, r4, r5), sp);
996 __ ret(lr);
997
998 __ bind(miss);
999 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
1000 __ pop(RegSet::of(r0, r2, r4, r5), sp);
1001 __ ret(lr);
1002 }
1003 break;
1004
1005 case C1StubId::monitorenter_nofpu_id:
1006 save_fpu_registers = false;
1007 // fall through
1008 case C1StubId::monitorenter_id:
1009 {
1010 StubFrame f(sasm, "monitorenter", dont_gc_arguments, requires_pop_epilogue_return);
1011 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1012
1013 // Called with store_parameter and not C abi
1014
1015 f.load_argument(1, r0); // r0,: object
1016 f.load_argument(0, r1); // r1,: lock address
1017
1018 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1);
1019
1020 oop_maps = new OopMapSet();
1021 oop_maps->add_gc_map(call_offset, map);
1022 restore_live_registers(sasm, save_fpu_registers);
1023 }
1024 break;
1025
1026 case C1StubId::is_instance_of_id:
1027 {
1028 // Mirror: c_rarg0
1029 // Object: c_rarg1
1030 // Temps: r3, r4, r5, r6
1031 // Result: r0
1032
1033 // Get the Klass* into c_rarg6
1034 Register klass = c_rarg6, obj = c_rarg1, result = r0;
1035 __ ldr(klass, Address(c_rarg0, java_lang_Class::klass_offset()));
1036
1037 Label fail, is_secondary, success;
1038
1039 __ cbz(klass, fail); // Klass is null
1040 __ cbz(obj, fail); // obj is null
1041
1042 __ ldrw(r3, Address(klass, in_bytes(Klass::super_check_offset_offset())));
1043 __ cmpw(r3, in_bytes(Klass::secondary_super_cache_offset()));
1044 __ br(Assembler::EQ, is_secondary); // Klass is a secondary superclass
1045
1046 // Klass is a concrete class
1047 __ load_klass(r5, obj);
1048 __ ldr(rscratch1, Address(r5, r3));
1049 __ cmp(klass, rscratch1);
1050 __ cset(result, Assembler::EQ);
1051 __ ret(lr);
1052
1053 __ bind(is_secondary);
1054
1055 __ load_klass(obj, obj);
1056
1057 // This is necessary because I am never in my own secondary_super list.
1058 __ cmp(obj, klass);
1059 __ br(Assembler::EQ, success);
1060
1061 __ lookup_secondary_supers_table_var(obj, klass,
1062 /*temps*/r3, r4, r5, v0,
1063 result,
1064 &success);
1065 __ bind(fail);
1066 __ mov(result, 0);
1067 __ ret(lr);
1068
1069 __ bind(success);
1070 __ mov(result, 1);
1071 __ ret(lr);
1072 }
1073 break;
1074
1075 case C1StubId::monitorexit_nofpu_id:
1076 save_fpu_registers = false;
1077 // fall through
1078 case C1StubId::monitorexit_id:
1079 {
1080 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1081 OopMap* map = save_live_registers(sasm, save_fpu_registers);
1082
1083 // Called with store_parameter and not C abi
1084
1085 f.load_argument(0, r0); // r0,: lock address
1086
1087 // note: really a leaf routine but must setup last java sp
1088 // => use call_RT for now (speed can be improved by
1089 // doing last java sp setup manually)
1090 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0);
1091
1092 oop_maps = new OopMapSet();
1093 oop_maps->add_gc_map(call_offset, map);
1094 restore_live_registers(sasm, save_fpu_registers);
1095 }
1096 break;
1097
1098 case C1StubId::deoptimize_id:
1099 {
1100 StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return);
1101 OopMap* oop_map = save_live_registers(sasm);
1102 f.load_argument(0, c_rarg1);
1103 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1);
1104
1105 oop_maps = new OopMapSet();
1106 oop_maps->add_gc_map(call_offset, oop_map);
1107 restore_live_registers(sasm);
1108 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1109 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
1110 __ leave();
1111 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1112 }
1113 break;
1114
1115 case C1StubId::throw_range_check_failed_id:
1116 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return);
1117 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1118 }
1119 break;
1120
1121 case C1StubId::unwind_exception_id:
1122 { __ set_info("unwind_exception", dont_gc_arguments);
1123 // note: no stubframe since we are about to leave the current
1124 // activation and we are calling a leaf VM function only.
1125 generate_unwind_exception(sasm);
1126 }
1127 break;
1128
1129 case C1StubId::access_field_patching_id:
1130 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return);
1131 // we should set up register map
1132 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1133 }
1134 break;
1135
1136 case C1StubId::load_klass_patching_id:
1137 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return);
1138 // we should set up register map
1139 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1140 }
1141 break;
1142
1143 case C1StubId::load_mirror_patching_id:
1144 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return);
1145 // we should set up register map
1146 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1147 }
1148 break;
1149
1150 case C1StubId::load_appendix_patching_id:
1151 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return);
1152 // we should set up register map
1153 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1154 }
1155 break;
1156
1157 case C1StubId::handle_exception_nofpu_id:
1158 case C1StubId::handle_exception_id:
1159 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1160 oop_maps = generate_handle_exception(id, sasm);
1161 }
1162 break;
1163
1164 case C1StubId::handle_exception_from_callee_id:
1165 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1166 oop_maps = generate_handle_exception(id, sasm);
1167 }
1168 break;
1169
1170 case C1StubId::throw_index_exception_id:
1171 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return);
1172 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1173 }
1174 break;
1175
1176 case C1StubId::throw_array_store_exception_id:
1177 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return);
1178 // tos + 0: link
1179 // + 1: return address
1180 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1181 }
1182 break;
1183
1184 case C1StubId::predicate_failed_trap_id:
1185 {
1186 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return);
1187
1188 OopMap* map = save_live_registers(sasm);
1189
1190 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1191 oop_maps = new OopMapSet();
1192 oop_maps->add_gc_map(call_offset, map);
1193 restore_live_registers(sasm);
1194 __ leave();
1195 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1196 assert(deopt_blob != nullptr, "deoptimization blob must have been created");
1197
1198 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1199 }
1200 break;
1201
1202 case C1StubId::dtrace_object_alloc_id:
1203 { // c_rarg0: object
1204 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
1205 save_live_registers(sasm);
1206
1207 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), c_rarg0);
1208
1209 restore_live_registers(sasm);
1210 }
1211 break;
1212
1213 default:
1214 // FIXME: For unhandled trap_id this code fails with assert during vm intialization
1215 // rather than insert a call to unimplemented_entry
1216 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments, does_not_return);
1217 __ mov(r0, (int)id);
1218 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1219 }
1220 break;
1221 }
1222 }
1223
1224
1225 return oop_maps;
1226 }
1227
1228 #undef __
1229
1230 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); }