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_offset())); 95 } 96 if (metadata_result->is_valid()) { 97 str(zr, Address(rthread, JavaThread::vm_result_2_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_result1, rthread); 112 } 113 if (metadata_result->is_valid()) { 114 get_vm_result_2(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_offset())); 410 __ str(zr, Address(rthread, JavaThread::vm_result_2_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(); }