1 /* 2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2023 SAP SE. 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/macroAssembler.inline.hpp" 28 #include "c1/c1_Defs.hpp" 29 #include "c1/c1_MacroAssembler.hpp" 30 #include "c1/c1_Runtime1.hpp" 31 #include "ci/ciUtilities.hpp" 32 #include "compiler/oopMap.hpp" 33 #include "gc/shared/cardTable.hpp" 34 #include "gc/shared/cardTableBarrierSet.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "nativeInst_ppc.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "register_ppc.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "runtime/signature.hpp" 42 #include "runtime/vframeArray.hpp" 43 #include "utilities/align.hpp" 44 #include "utilities/macros.hpp" 45 #include "utilities/powerOfTwo.hpp" 46 #include "vmreg_ppc.inline.hpp" 47 48 // Implementation of StubAssembler 49 50 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, 51 address entry_point, int number_of_arguments) { 52 set_num_rt_args(0); // Nothing on stack 53 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || 54 oop_result1 != metadata_result, "registers must be different"); 55 56 // Currently no stack banging. We assume that there are enough 57 // StackShadowPages (which have been banged in generate_stack_overflow_check) 58 // for the stub frame and the runtime frames. 59 60 set_last_Java_frame(R1_SP, noreg); 61 62 // ARG1 must hold thread address. 63 mr(R3_ARG1, R16_thread); 64 65 address return_pc = call_c(entry_point); 66 67 // Last java sp can be null when the RT call was preempted 68 reset_last_Java_frame(false /* check_last_java_sp */); 69 70 // Check for pending exceptions. 71 { 72 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread); 73 cmpdi(CCR0, R0, 0); 74 75 // This used to conditionally jump to forward_exception however it is 76 // possible if we relocate that the branch will not reach. So we must jump 77 // around so we can always reach. 78 79 Label ok; 80 beq(CCR0, ok); 81 82 // Make sure that the vm_results are cleared. 83 if (oop_result1->is_valid() || metadata_result->is_valid()) { 84 li(R0, 0); 85 if (oop_result1->is_valid()) { 86 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread); 87 } 88 if (metadata_result->is_valid()) { 89 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread); 90 } 91 } 92 93 if (frame_size() == no_frame_size) { 94 ShouldNotReachHere(); // We always have a frame size. 95 //pop_frame(); // pop the stub frame 96 //ld(R0, _abi0(lr), R1_SP); 97 //mtlr(R0); 98 //load_const_optimized(R0, StubRoutines::forward_exception_entry()); 99 //mtctr(R0); 100 //bctr(); 101 } else if (_stub_id == (int)C1StubId::forward_exception_id) { 102 should_not_reach_here(); 103 } else { 104 // keep stub frame for next call_RT 105 //load_const_optimized(R0, Runtime1::entry_for(C1StubId::forward_exception_id)); 106 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(C1StubId::forward_exception_id))); 107 mtctr(R0); 108 bctr(); 109 } 110 111 bind(ok); 112 } 113 114 // Get oop results if there are any and reset the values in the thread. 115 if (oop_result1->is_valid()) { 116 get_vm_result(oop_result1); 117 } 118 if (metadata_result->is_valid()) { 119 get_vm_result_2(metadata_result); 120 } 121 122 return (int)(return_pc - code_section()->start()); 123 } 124 125 126 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 127 mr_if_needed(R4_ARG2, arg1); 128 return call_RT(oop_result1, metadata_result, entry, 1); 129 } 130 131 132 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { 133 mr_if_needed(R4_ARG2, arg1); 134 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument"); 135 return call_RT(oop_result1, metadata_result, entry, 2); 136 } 137 138 139 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 140 mr_if_needed(R4_ARG2, arg1); 141 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument"); 142 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument"); 143 return call_RT(oop_result1, metadata_result, entry, 3); 144 } 145 146 147 // Implementation of Runtime1 148 149 #define __ sasm-> 150 151 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 152 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 153 static int frame_size_in_bytes = -1; 154 155 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 156 assert(frame_size_in_bytes > frame::native_abi_reg_args_size, "init"); 157 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 158 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 159 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 160 161 int i; 162 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 163 Register r = as_Register(i); 164 if (FrameMap::reg_needs_save(r)) { 165 int sp_offset = cpu_reg_save_offsets[i]; 166 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg()); 167 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next()); 168 } 169 } 170 171 if (save_fpu_registers) { 172 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 173 FloatRegister r = as_FloatRegister(i); 174 int sp_offset = fpu_reg_save_offsets[i]; 175 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg()); 176 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next()); 177 } 178 } 179 180 return oop_map; 181 } 182 183 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true, 184 Register ret_pc = noreg, int stack_preserve = 0) { 185 if (ret_pc == noreg) { 186 ret_pc = R0; 187 __ mflr(ret_pc); 188 } 189 __ std(ret_pc, _abi0(lr), R1_SP); // C code needs pc in C1 method. 190 __ push_frame(frame_size_in_bytes + stack_preserve, R0); 191 192 // Record volatile registers as callee-save values in an OopMap so 193 // their save locations will be propagated to the caller frame's 194 // RegisterMap during StackFrameStream construction (needed for 195 // deoptimization; see compiledVFrame::create_stack_value). 196 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)). 197 198 int i; 199 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 200 Register r = as_Register(i); 201 if (FrameMap::reg_needs_save(r)) { 202 int sp_offset = cpu_reg_save_offsets[i]; 203 __ std(r, sp_offset, R1_SP); 204 } 205 } 206 207 if (save_fpu_registers) { 208 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 209 FloatRegister r = as_FloatRegister(i); 210 int sp_offset = fpu_reg_save_offsets[i]; 211 __ stfd(r, sp_offset, R1_SP); 212 } 213 } 214 215 return generate_oop_map(sasm, save_fpu_registers); 216 } 217 218 static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2, 219 bool restore_fpu_registers = true) { 220 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 221 Register r = as_Register(i); 222 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) { 223 int sp_offset = cpu_reg_save_offsets[i]; 224 __ ld(r, sp_offset, R1_SP); 225 } 226 } 227 228 if (restore_fpu_registers) { 229 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 230 FloatRegister r = as_FloatRegister(i); 231 int sp_offset = fpu_reg_save_offsets[i]; 232 __ lfd(r, sp_offset, R1_SP); 233 } 234 } 235 236 __ pop_frame(); 237 __ ld(R0, _abi0(lr), R1_SP); 238 __ mtlr(R0); 239 } 240 241 242 void Runtime1::initialize_pd() { 243 int i; 244 int sp_offset = frame::native_abi_reg_args_size; 245 246 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 247 Register r = as_Register(i); 248 if (FrameMap::reg_needs_save(r)) { 249 cpu_reg_save_offsets[i] = sp_offset; 250 sp_offset += BytesPerWord; 251 } 252 } 253 254 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 255 fpu_reg_save_offsets[i] = sp_offset; 256 sp_offset += BytesPerWord; 257 } 258 frame_size_in_bytes = align_up(sp_offset, frame::alignment_in_bytes); 259 } 260 261 uint Runtime1::runtime_blob_current_thread_offset(frame f) { 262 // On PPC virtual threads don't save the JavaThread* in their context (e.g. C1 stub frames). 263 ShouldNotCallThis(); 264 return 0; 265 } 266 267 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 268 // Make a frame and preserve the caller's caller-save registers. 269 OopMap* oop_map = save_live_registers(sasm); 270 271 int call_offset; 272 if (!has_argument) { 273 call_offset = __ call_RT(noreg, noreg, target); 274 } else { 275 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2); 276 } 277 OopMapSet* oop_maps = new OopMapSet(); 278 oop_maps->add_gc_map(call_offset, oop_map); 279 280 __ should_not_reach_here(); 281 return oop_maps; 282 } 283 284 static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target, 285 int stack_parms) { 286 // Make a frame and preserve the caller's caller-save registers. 287 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes); 288 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord); 289 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes); 290 291 int call_offset = 0; 292 switch (stack_parms) { 293 case 3: 294 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP); 295 case 2: 296 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP); 297 case 1: 298 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP); 299 case 0: 300 call_offset = __ call_RT(noreg, noreg, target); 301 break; 302 default: Unimplemented(); break; 303 } 304 OopMapSet* oop_maps = new OopMapSet(); 305 oop_maps->add_gc_map(call_offset, oop_map); 306 307 __ should_not_reach_here(); 308 return oop_maps; 309 } 310 311 312 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target, 313 Register arg1, Register arg2, Register arg3) { 314 // Make a frame and preserve the caller's caller-save registers. 315 OopMap* oop_map = save_live_registers(sasm); 316 317 int call_offset; 318 if (arg1 == noreg) { 319 call_offset = __ call_RT(result, noreg, target); 320 } else if (arg2 == noreg) { 321 call_offset = __ call_RT(result, noreg, target, arg1); 322 } else if (arg3 == noreg) { 323 call_offset = __ call_RT(result, noreg, target, arg1, arg2); 324 } else { 325 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3); 326 } 327 OopMapSet* oop_maps = new OopMapSet(); 328 oop_maps->add_gc_map(call_offset, oop_map); 329 330 restore_live_registers(sasm, result, noreg); 331 __ blr(); 332 return oop_maps; 333 } 334 335 static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target, 336 int stack_parms, bool do_return = true) { 337 // Make a frame and preserve the caller's caller-save registers. 338 const int parm_size_in_bytes = align_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes); 339 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord); 340 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes); 341 342 int call_offset = 0; 343 switch (stack_parms) { 344 case 3: 345 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP); 346 case 2: 347 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP); 348 case 1: 349 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP); 350 case 0: 351 call_offset = __ call_RT(result, noreg, target); 352 break; 353 default: Unimplemented(); break; 354 } 355 OopMapSet* oop_maps = new OopMapSet(); 356 oop_maps->add_gc_map(call_offset, oop_map); 357 358 restore_live_registers(sasm, result, noreg); 359 if (do_return) __ blr(); 360 return oop_maps; 361 } 362 363 364 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 365 // Make a frame and preserve the caller's caller-save registers. 366 OopMap* oop_map = save_live_registers(sasm); 367 368 // Call the runtime patching routine, returns non-zero if nmethod got deopted. 369 int call_offset = __ call_RT(noreg, noreg, target); 370 OopMapSet* oop_maps = new OopMapSet(); 371 oop_maps->add_gc_map(call_offset, oop_map); 372 __ cmpdi(CCR0, R3_RET, 0); 373 374 // Re-execute the patched instruction or, if the nmethod was deoptmized, 375 // return to the deoptimization handler entry that will cause re-execution 376 // of the current bytecode. 377 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 378 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 379 380 // Return to the deoptimization handler entry for unpacking and rexecute. 381 // If we simply returned the we'd deopt as if any call we patched had just 382 // returned. 383 384 restore_live_registers(sasm, noreg, noreg); 385 // Return if patching routine returned 0. 386 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn); 387 388 address stub = deopt_blob->unpack_with_reexecution(); 389 //__ load_const_optimized(R0, stub); 390 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 391 __ mtctr(R0); 392 __ bctr(); 393 394 return oop_maps; 395 } 396 397 OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) { 398 OopMapSet* oop_maps = nullptr; 399 400 // For better readability. 401 const bool must_gc_arguments = true; 402 const bool dont_gc_arguments = false; 403 404 // Stub code & info for the different stubs. 405 switch (id) { 406 case C1StubId::forward_exception_id: 407 { 408 oop_maps = generate_handle_exception(id, sasm); 409 } 410 break; 411 412 case C1StubId::new_instance_id: 413 case C1StubId::fast_new_instance_id: 414 case C1StubId::fast_new_instance_init_check_id: 415 { 416 if (id == C1StubId::new_instance_id) { 417 __ set_info("new_instance", dont_gc_arguments); 418 } else if (id == C1StubId::fast_new_instance_id) { 419 __ set_info("fast new_instance", dont_gc_arguments); 420 } else { 421 assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId"); 422 __ set_info("fast new_instance init check", dont_gc_arguments); 423 } 424 425 // We don't support eden allocation. 426 427 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2); 428 } 429 break; 430 431 case C1StubId::counter_overflow_id: 432 // Bci and method are on stack. 433 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2); 434 break; 435 436 case C1StubId::new_type_array_id: 437 case C1StubId::new_object_array_id: 438 { 439 if (id == C1StubId::new_type_array_id) { 440 __ set_info("new_type_array", dont_gc_arguments); 441 } else { 442 __ set_info("new_object_array", dont_gc_arguments); 443 } 444 445 #ifdef ASSERT 446 // Assert object type is really an array of the proper kind. 447 { 448 int tag = (id == C1StubId::new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value; 449 Label ok; 450 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2); 451 __ srawi(R0, R0, Klass::_lh_array_tag_shift); 452 __ cmpwi(CCR0, R0, tag); 453 __ beq(CCR0, ok); 454 __ stop("assert(is an array klass)"); 455 __ should_not_reach_here(); 456 __ bind(ok); 457 } 458 #endif // ASSERT 459 460 // We don't support eden allocation. 461 462 if (id == C1StubId::new_type_array_id) { 463 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3); 464 } else { 465 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3); 466 } 467 } 468 break; 469 470 case C1StubId::new_multi_array_id: 471 { 472 // R4: klass 473 // R5: rank 474 // R6: address of 1st dimension 475 __ set_info("new_multi_array", dont_gc_arguments); 476 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4); 477 } 478 break; 479 480 case C1StubId::register_finalizer_id: 481 { 482 __ set_info("register_finalizer", dont_gc_arguments); 483 // This code is called via rt_call. Hence, caller-save registers have been saved. 484 Register t = R11_scratch1; 485 486 // Load the klass and check the has finalizer flag. 487 __ load_klass(t, R3_ARG1); 488 __ lbz(t, in_bytes(Klass::misc_flags_offset()), t); 489 __ testbitdi(CCR0, R0, t, exact_log2(KlassFlags::_misc_has_finalizer)); 490 // Return if has_finalizer bit == 0 (CR0.eq). 491 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn); 492 493 __ mflr(R0); 494 __ std(R0, _abi0(lr), R1_SP); 495 __ push_frame(frame::native_abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs). 496 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord); 497 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0); 498 int call_offset = __ call_RT(noreg, noreg, 499 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1); 500 oop_maps = new OopMapSet(); 501 oop_maps->add_gc_map(call_offset, oop_map); 502 503 __ pop_frame(); 504 __ ld(R0, _abi0(lr), R1_SP); 505 __ mtlr(R0); 506 __ blr(); 507 } 508 break; 509 510 case C1StubId::throw_range_check_failed_id: 511 { 512 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded. 513 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 2); 514 } 515 break; 516 517 case C1StubId::throw_index_exception_id: 518 { 519 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded. 520 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 521 } 522 break; 523 524 case C1StubId::throw_div0_exception_id: 525 { 526 __ set_info("throw_div0_exception", dont_gc_arguments); 527 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 528 } 529 break; 530 531 case C1StubId::throw_null_pointer_exception_id: 532 { 533 __ set_info("throw_null_pointer_exception", dont_gc_arguments); 534 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 535 } 536 break; 537 538 case C1StubId::handle_exception_nofpu_id: 539 case C1StubId::handle_exception_id: 540 { 541 __ set_info("handle_exception", dont_gc_arguments); 542 oop_maps = generate_handle_exception(id, sasm); 543 } 544 break; 545 546 case C1StubId::handle_exception_from_callee_id: 547 { 548 __ set_info("handle_exception_from_callee", dont_gc_arguments); 549 oop_maps = generate_handle_exception(id, sasm); 550 } 551 break; 552 553 case C1StubId::unwind_exception_id: 554 { 555 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/, 556 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/, 557 Rexception_save = R31, Rcaller_sp = R30; 558 __ set_info("unwind_exception", dont_gc_arguments); 559 560 if (AbortVMOnException) { 561 save_live_registers(sasm); 562 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), Rexception); 563 restore_live_registers(sasm, noreg, noreg); 564 } 565 566 __ ld(Rcaller_sp, 0, R1_SP); 567 __ push_frame_reg_args(0, R0); // dummy frame for C call 568 __ mr(Rexception_save, Rexception); // save over C call 569 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc 570 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc); 571 __ verify_not_null_oop(Rexception_save); 572 __ mtctr(R3_RET); 573 __ ld(Rexception_pc, _abi0(lr), Rcaller_sp); // return pc 574 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once. 575 __ mr(Rexception, Rexception_save); // restore 576 __ mtlr(Rexception_pc); 577 __ bctr(); 578 } 579 break; 580 581 case C1StubId::throw_array_store_exception_id: 582 { 583 __ set_info("throw_array_store_exception", dont_gc_arguments); 584 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 585 } 586 break; 587 588 case C1StubId::throw_class_cast_exception_id: 589 { 590 __ set_info("throw_class_cast_exception", dont_gc_arguments); 591 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 592 } 593 break; 594 595 case C1StubId::throw_incompatible_class_change_error_id: 596 { 597 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments); 598 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 599 } 600 break; 601 602 case C1StubId::slow_subtype_check_id: 603 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super ); 604 const Register sub_klass = R5, 605 super_klass = R4, 606 temp1_reg = R6, 607 temp2_reg = R0; 608 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful 609 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne 610 __ blr(); 611 } 612 break; 613 614 case C1StubId::monitorenter_nofpu_id: 615 case C1StubId::monitorenter_id: 616 { 617 __ set_info("monitorenter", dont_gc_arguments); 618 619 int save_fpu_registers = (id == C1StubId::monitorenter_id); 620 // Make a frame and preserve the caller's caller-save registers. 621 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 622 623 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3); 624 625 oop_maps = new OopMapSet(); 626 oop_maps->add_gc_map(call_offset, oop_map); 627 628 restore_live_registers(sasm, noreg, noreg, save_fpu_registers); 629 __ blr(); 630 } 631 break; 632 633 case C1StubId::monitorexit_nofpu_id: 634 case C1StubId::monitorexit_id: 635 { 636 // note: Really a leaf routine but must setup last java sp 637 // => use call_RT for now (speed can be improved by 638 // doing last java sp setup manually). 639 __ set_info("monitorexit", dont_gc_arguments); 640 641 int save_fpu_registers = (id == C1StubId::monitorexit_id); 642 // Make a frame and preserve the caller's caller-save registers. 643 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 644 645 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2); 646 647 oop_maps = new OopMapSet(); 648 oop_maps->add_gc_map(call_offset, oop_map); 649 650 restore_live_registers(sasm, noreg, noreg, save_fpu_registers); 651 __ blr(); 652 } 653 break; 654 655 case C1StubId::deoptimize_id: 656 { 657 __ set_info("deoptimize", dont_gc_arguments); 658 __ std(R0, -8, R1_SP); // Pass trap_request on stack. 659 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false); 660 661 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 662 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 663 address stub = deopt_blob->unpack_with_reexecution(); 664 //__ load_const_optimized(R0, stub); 665 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 666 __ mtctr(R0); 667 __ bctr(); 668 } 669 break; 670 671 case C1StubId::access_field_patching_id: 672 { 673 __ set_info("access_field_patching", dont_gc_arguments); 674 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 675 } 676 break; 677 678 case C1StubId::load_klass_patching_id: 679 { 680 __ set_info("load_klass_patching", dont_gc_arguments); 681 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 682 } 683 break; 684 685 case C1StubId::load_mirror_patching_id: 686 { 687 __ set_info("load_mirror_patching", dont_gc_arguments); 688 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 689 } 690 break; 691 692 case C1StubId::load_appendix_patching_id: 693 { 694 __ set_info("load_appendix_patching", dont_gc_arguments); 695 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 696 } 697 break; 698 699 case C1StubId::dtrace_object_alloc_id: 700 { // O0: object 701 __ unimplemented("stub dtrace_object_alloc_id"); 702 __ set_info("dtrace_object_alloc", dont_gc_arguments); 703 // // We can't gc here so skip the oopmap but make sure that all 704 // // the live registers get saved. 705 // save_live_registers(sasm); 706 // 707 // __ save_thread(L7_thread_cache); 708 // __ call(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), 709 // relocInfo::runtime_call_type); 710 // __ delayed()->mov(I0, O0); 711 // __ restore_thread(L7_thread_cache); 712 // 713 // restore_live_registers(sasm); 714 // __ ret(); 715 // __ delayed()->restore(); 716 } 717 break; 718 719 case C1StubId::predicate_failed_trap_id: 720 { 721 __ set_info("predicate_failed_trap", dont_gc_arguments); 722 OopMap* oop_map = save_live_registers(sasm); 723 724 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 725 726 oop_maps = new OopMapSet(); 727 oop_maps->add_gc_map(call_offset, oop_map); 728 729 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 730 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 731 restore_live_registers(sasm, noreg, noreg); 732 733 address stub = deopt_blob->unpack_with_reexecution(); 734 //__ load_const_optimized(R0, stub); 735 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 736 __ mtctr(R0); 737 __ bctr(); 738 } 739 break; 740 741 default: 742 { 743 __ set_info("unimplemented entry", dont_gc_arguments); 744 __ mflr(R0); 745 __ std(R0, _abi0(lr), R1_SP); 746 __ push_frame(frame::native_abi_reg_args_size, R0); // empty dummy frame 747 sasm->set_frame_size(frame::native_abi_reg_args_size / BytesPerWord); 748 OopMap* oop_map = new OopMap(frame::native_abi_reg_args_size / sizeof(jint), 0); 749 750 __ load_const_optimized(R4_ARG2, (int)id); 751 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2); 752 753 oop_maps = new OopMapSet(); 754 oop_maps->add_gc_map(call_offset, oop_map); 755 __ should_not_reach_here(); 756 } 757 break; 758 } 759 return oop_maps; 760 } 761 762 763 OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler* sasm) { 764 __ block_comment("generate_handle_exception"); 765 766 // Save registers, if required. 767 OopMapSet* oop_maps = new OopMapSet(); 768 OopMap* oop_map = nullptr; 769 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/, 770 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/; 771 772 switch (id) { 773 case C1StubId::forward_exception_id: 774 // We're handling an exception in the context of a compiled frame. 775 // The registers have been saved in the standard places. Perform 776 // an exception lookup in the caller and dispatch to the handler 777 // if found. Otherwise unwind and dispatch to the callers 778 // exception handler. 779 oop_map = generate_oop_map(sasm, true); 780 // Transfer the pending exception to the exception_oop. 781 // Also load the PC which is typically at SP + frame_size_in_bytes +_abi0(lr), 782 // but we support additional slots in the frame for parameter passing. 783 __ ld(Rexception_pc, 0, R1_SP); 784 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread); 785 __ li(R0, 0); 786 __ ld(Rexception_pc, _abi0(lr), Rexception_pc); 787 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread); 788 break; 789 case C1StubId::handle_exception_nofpu_id: 790 case C1StubId::handle_exception_id: 791 // At this point all registers MAY be live. 792 oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id, Rexception_pc); 793 break; 794 case C1StubId::handle_exception_from_callee_id: 795 // At this point all registers except exception oop and exception pc are dead. 796 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); 797 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 798 __ std(Rexception_pc, _abi0(lr), R1_SP); 799 __ push_frame(frame_size_in_bytes, R0); 800 break; 801 default: ShouldNotReachHere(); 802 } 803 804 __ verify_not_null_oop(Rexception); 805 806 #ifdef ASSERT 807 // Check that fields in JavaThread for exception oop and issuing pc are 808 // empty before writing to them. 809 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread); 810 __ cmpdi(CCR0, R0, 0); 811 __ asm_assert_eq("exception oop already set"); 812 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread); 813 __ cmpdi(CCR0, R0, 0); 814 __ asm_assert_eq("exception pc already set"); 815 #endif 816 817 // Save the exception and issuing pc in the thread. 818 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread); 819 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread); 820 821 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 822 oop_maps->add_gc_map(call_offset, oop_map); 823 824 __ mtctr(R3_RET); 825 826 // Note: if nmethod has been deoptimized then regardless of 827 // whether it had a handler or not we will deoptimize 828 // by entering the deopt blob with a pending exception. 829 830 // Restore the registers that were saved at the beginning, remove 831 // the frame and jump to the exception handler. 832 switch (id) { 833 case C1StubId::forward_exception_id: 834 case C1StubId::handle_exception_nofpu_id: 835 case C1StubId::handle_exception_id: 836 restore_live_registers(sasm, noreg, noreg, id != C1StubId::handle_exception_nofpu_id); 837 __ bctr(); 838 break; 839 case C1StubId::handle_exception_from_callee_id: { 840 __ pop_frame(); 841 __ ld(Rexception_pc, _abi0(lr), R1_SP); 842 __ mtlr(Rexception_pc); 843 __ bctr(); 844 break; 845 } 846 default: ShouldNotReachHere(); 847 } 848 849 return oop_maps; 850 } 851 852 const char *Runtime1::pd_name_for_address(address entry) { 853 return "<unknown function>"; 854 } 855 856 #undef __