1/* 2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2015 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 "c1/c1_Defs.hpp" 28#include "c1/c1_MacroAssembler.hpp" 29#include "c1/c1_Runtime1.hpp" 30#include "interpreter/interpreter.hpp" 31#include "nativeInst_ppc.hpp" 32#include "oops/compiledICHolder.hpp" 33#include "oops/oop.inline.hpp" 34#include "prims/jvmtiExport.hpp" 35#include "register_ppc.hpp" 36#include "runtime/sharedRuntime.hpp" 37#include "runtime/signature.hpp" 38#include "runtime/vframeArray.hpp" 39#include "utilities/macros.hpp" 40#include "vmreg_ppc.inline.hpp" 41#if INCLUDE_ALL_GCS 42#include "gc/g1/g1SATBCardTableModRefBS.hpp" 43#endif 44 45// Implementation of StubAssembler 46 47int StubAssembler::call_RT(Register oop_result1, Register metadata_result, 48 address entry_point, int number_of_arguments) { 49 set_num_rt_args(0); // Nothing on stack 50 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || 51 oop_result1 != metadata_result, "registers must be different"); 52 53 // Currently no stack banging. We assume that there are enough 54 // StackShadowPages (which have been banged in generate_stack_overflow_check) 55 // for the stub frame and the runtime frames. 56 57 set_last_Java_frame(R1_SP, noreg); 58 59 // ARG1 must hold thread address. 60 mr(R3_ARG1, R16_thread); 61 62 address return_pc = call_c_with_frame_resize(entry_point, /*No resize, we have a C compatible frame.*/0); 63 64 reset_last_Java_frame(); 65 66 // Check for pending exceptions. 67 { 68 ld(R0, in_bytes(Thread::pending_exception_offset()), R16_thread); 69 cmpdi(CCR0, R0, 0); 70 71 // This used to conditionally jump to forward_exception however it is 72 // possible if we relocate that the branch will not reach. So we must jump 73 // around so we can always reach. 74 75 Label ok; 76 beq(CCR0, ok); 77 78 // Make sure that the vm_results are cleared. 79 if (oop_result1->is_valid() || metadata_result->is_valid()) { 80 li(R0, 0); 81 if (oop_result1->is_valid()) { 82 std(R0, in_bytes(JavaThread::vm_result_offset()), R16_thread); 83 } 84 if (metadata_result->is_valid()) { 85 std(R0, in_bytes(JavaThread::vm_result_2_offset()), R16_thread); 86 } 87 } 88 89 if (frame_size() == no_frame_size) { 90 ShouldNotReachHere(); // We always have a frame size. 91 //pop_frame(); // pop the stub frame 92 //ld(R0, _abi(lr), R1_SP); 93 //mtlr(R0); 94 //load_const_optimized(R0, StubRoutines::forward_exception_entry()); 95 //mtctr(R0); 96 //bctr(); 97 } else if (_stub_id == Runtime1::forward_exception_id) { 98 should_not_reach_here(); 99 } else { 100 // keep stub frame for next call_RT 101 //load_const_optimized(R0, Runtime1::entry_for(Runtime1::forward_exception_id)); 102 add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(Runtime1::entry_for(Runtime1::forward_exception_id))); 103 mtctr(R0); 104 bctr(); 105 } 106 107 bind(ok); 108 } 109 110 // Get oop results if there are any and reset the values in the thread. 111 if (oop_result1->is_valid()) { 112 get_vm_result(oop_result1); 113 } 114 if (metadata_result->is_valid()) { 115 get_vm_result_2(metadata_result); 116 } 117 118 return (int)(return_pc - code_section()->start()); 119} 120 121 122int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 123 mr_if_needed(R4_ARG2, arg1); 124 return call_RT(oop_result1, metadata_result, entry, 1); 125} 126 127 128int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { 129 mr_if_needed(R4_ARG2, arg1); 130 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument"); 131 return call_RT(oop_result1, metadata_result, entry, 2); 132} 133 134 135int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 136 mr_if_needed(R4_ARG2, arg1); 137 mr_if_needed(R5_ARG3, arg2); assert(arg2 != R4_ARG2, "smashed argument"); 138 mr_if_needed(R6_ARG4, arg3); assert(arg3 != R4_ARG2 && arg3 != R5_ARG3, "smashed argument"); 139 return call_RT(oop_result1, metadata_result, entry, 3); 140} 141 142 143// Implementation of Runtime1 144 145#define __ sasm-> 146 147static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 148static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 149static int frame_size_in_bytes = -1; 150 151static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 152 assert(frame_size_in_bytes > frame::abi_reg_args_size, "init"); 153 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 154 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 155 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 156 157 int i; 158 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 159 Register r = as_Register(i); 160 if (FrameMap::reg_needs_save(r)) { 161 int sp_offset = cpu_reg_save_offsets[i]; 162 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg()); 163 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next()); 164 } 165 } 166 167 if (save_fpu_registers) { 168 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 169 FloatRegister r = as_FloatRegister(i); 170 int sp_offset = fpu_reg_save_offsets[i]; 171 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset>>2), r->as_VMReg()); 172 oop_map->set_callee_saved(VMRegImpl::stack2reg((sp_offset>>2) + 1), r->as_VMReg()->next()); 173 } 174 } 175 176 return oop_map; 177} 178 179static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true, 180 Register ret_pc = noreg, int stack_preserve = 0) { 181 if (ret_pc == noreg) { 182 ret_pc = R0; 183 __ mflr(ret_pc); 184 } 185 __ std(ret_pc, _abi(lr), R1_SP); // C code needs pc in C1 method. 186 __ push_frame(frame_size_in_bytes + stack_preserve, R0); 187 188 // Record volatile registers as callee-save values in an OopMap so 189 // their save locations will be propagated to the caller frame's 190 // RegisterMap during StackFrameStream construction (needed for 191 // deoptimization; see compiledVFrame::create_stack_value). 192 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)). 193 194 int i; 195 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 196 Register r = as_Register(i); 197 if (FrameMap::reg_needs_save(r)) { 198 int sp_offset = cpu_reg_save_offsets[i]; 199 __ std(r, sp_offset + STACK_BIAS, R1_SP); 200 } 201 } 202 203 if (save_fpu_registers) { 204 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 205 FloatRegister r = as_FloatRegister(i); 206 int sp_offset = fpu_reg_save_offsets[i]; 207 __ stfd(r, sp_offset + STACK_BIAS, R1_SP); 208 } 209 } 210 211 return generate_oop_map(sasm, save_fpu_registers); 212} 213 214static void restore_live_registers(StubAssembler* sasm, Register result1, Register result2, 215 bool restore_fpu_registers = true) { 216 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 217 Register r = as_Register(i); 218 if (FrameMap::reg_needs_save(r) && r != result1 && r != result2) { 219 int sp_offset = cpu_reg_save_offsets[i]; 220 __ ld(r, sp_offset + STACK_BIAS, R1_SP); 221 } 222 } 223 224 if (restore_fpu_registers) { 225 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 226 FloatRegister r = as_FloatRegister(i); 227 int sp_offset = fpu_reg_save_offsets[i]; 228 __ lfd(r, sp_offset + STACK_BIAS, R1_SP); 229 } 230 } 231 232 __ pop_frame(); 233 __ ld(R0, _abi(lr), R1_SP); 234 __ mtlr(R0); 235} 236 237 238void Runtime1::initialize_pd() { 239 int i; 240 int sp_offset = frame::abi_reg_args_size; 241 242 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 243 Register r = as_Register(i); 244 if (FrameMap::reg_needs_save(r)) { 245 cpu_reg_save_offsets[i] = sp_offset; 246 sp_offset += BytesPerWord; 247 } 248 } 249 250 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 251 fpu_reg_save_offsets[i] = sp_offset; 252 sp_offset += BytesPerWord; 253 } 254 frame_size_in_bytes = align_size_up(sp_offset, frame::alignment_in_bytes); 255} 256 257 258OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 259 // Make a frame and preserve the caller's caller-save registers. 260 OopMap* oop_map = save_live_registers(sasm); 261 262 int call_offset; 263 if (!has_argument) { 264 call_offset = __ call_RT(noreg, noreg, target); 265 } else { 266 call_offset = __ call_RT(noreg, noreg, target, R4_ARG2); 267 } 268 OopMapSet* oop_maps = new OopMapSet(); 269 oop_maps->add_gc_map(call_offset, oop_map); 270 271 __ should_not_reach_here(); 272 return oop_maps; 273} 274 275static OopMapSet* generate_exception_throw_with_stack_parms(StubAssembler* sasm, address target, 276 int stack_parms) { 277 // Make a frame and preserve the caller's caller-save registers. 278 const int parm_size_in_bytes = align_size_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes); 279 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord); 280 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes); 281 282 int call_offset = 0; 283 switch (stack_parms) { 284 case 3: 285 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP); 286 case 2: 287 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP); 288 case 1: 289 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP); 290 call_offset = __ call_RT(noreg, noreg, target); 291 break; 292 default: Unimplemented(); break; 293 } 294 OopMapSet* oop_maps = new OopMapSet(); 295 oop_maps->add_gc_map(call_offset, oop_map); 296 297 __ should_not_reach_here(); 298 return oop_maps; 299} 300 301 302OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target, 303 Register arg1, Register arg2, Register arg3) { 304 // Make a frame and preserve the caller's caller-save registers. 305 OopMap* oop_map = save_live_registers(sasm); 306 307 int call_offset; 308 if (arg1 == noreg) { 309 call_offset = __ call_RT(result, noreg, target); 310 } else if (arg2 == noreg) { 311 call_offset = __ call_RT(result, noreg, target, arg1); 312 } else if (arg3 == noreg) { 313 call_offset = __ call_RT(result, noreg, target, arg1, arg2); 314 } else { 315 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3); 316 } 317 OopMapSet* oop_maps = new OopMapSet(); 318 oop_maps->add_gc_map(call_offset, oop_map); 319 320 restore_live_registers(sasm, result, noreg); 321 __ blr(); 322 return oop_maps; 323} 324 325static OopMapSet* stub_call_with_stack_parms(StubAssembler* sasm, Register result, address target, 326 int stack_parms, bool do_return = true) { 327 // Make a frame and preserve the caller's caller-save registers. 328 const int parm_size_in_bytes = align_size_up(stack_parms << LogBytesPerWord, frame::alignment_in_bytes); 329 const int padding = parm_size_in_bytes - (stack_parms << LogBytesPerWord); 330 OopMap* oop_map = save_live_registers(sasm, true, noreg, parm_size_in_bytes); 331 332 int call_offset = 0; 333 switch (stack_parms) { 334 case 3: 335 __ ld(R6_ARG4, frame_size_in_bytes + padding + 16, R1_SP); 336 case 2: 337 __ ld(R5_ARG3, frame_size_in_bytes + padding + 8, R1_SP); 338 case 1: 339 __ ld(R4_ARG2, frame_size_in_bytes + padding + 0, R1_SP); 340 call_offset = __ call_RT(result, noreg, target); 341 break; 342 default: Unimplemented(); break; 343 } 344 OopMapSet* oop_maps = new OopMapSet(); 345 oop_maps->add_gc_map(call_offset, oop_map); 346 347 restore_live_registers(sasm, result, noreg); 348 if (do_return) __ blr(); 349 return oop_maps; 350} 351 352 353OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 354 // Make a frame and preserve the caller's caller-save registers. 355 OopMap* oop_map = save_live_registers(sasm); 356 357 // Call the runtime patching routine, returns non-zero if nmethod got deopted. 358 int call_offset = __ call_RT(noreg, noreg, target); 359 OopMapSet* oop_maps = new OopMapSet(); 360 oop_maps->add_gc_map(call_offset, oop_map); 361 __ cmpdi(CCR0, R3_RET, 0); 362 363 // Re-execute the patched instruction or, if the nmethod was deoptmized, 364 // return to the deoptimization handler entry that will cause re-execution 365 // of the current bytecode. 366 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 367 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 368 369 // Return to the deoptimization handler entry for unpacking and rexecute. 370 // If we simply returned the we'd deopt as if any call we patched had just 371 // returned. 372 373 restore_live_registers(sasm, noreg, noreg); 374 // Return if patching routine returned 0. 375 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn); 376 377 address stub = deopt_blob->unpack_with_reexecution(); 378 //__ load_const_optimized(R0, stub); 379 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 380 __ mtctr(R0); 381 __ bctr(); 382 383 return oop_maps; 384} 385 386OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 387 OopMapSet* oop_maps = NULL; 388 389 // For better readability. 390 const bool must_gc_arguments = true; 391 const bool dont_gc_arguments = false; 392 393 // Stub code & info for the different stubs. 394 switch (id) { 395 case forward_exception_id: 396 { 397 oop_maps = generate_handle_exception(id, sasm); 398 } 399 break; 400 401 case new_instance_id: 402 case fast_new_instance_id: 403 case fast_new_instance_init_check_id: 404 { 405 if (id == new_instance_id) { 406 __ set_info("new_instance", dont_gc_arguments); 407 } else if (id == fast_new_instance_id) { 408 __ set_info("fast new_instance", dont_gc_arguments); 409 } else { 410 assert(id == fast_new_instance_init_check_id, "bad StubID"); 411 __ set_info("fast new_instance init check", dont_gc_arguments); 412 } 413 // We don't support eden allocation. 414// if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && 415// UseTLAB && FastTLABRefill) { 416// if (id == fast_new_instance_init_check_id) { 417// // make sure the klass is initialized 418// __ lbz(R0, in_bytes(InstanceKlass::init_state_offset()), R3_ARG1); 419// __ cmpwi(CCR0, R0, InstanceKlass::fully_initialized); 420// __ bne(CCR0, slow_path); 421// } 422//#ifdef ASSERT 423// // assert object can be fast path allocated 424// { 425// Label ok, not_ok; 426// __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R3_ARG1); 427// // make sure it's an instance (LH > 0) 428// __ cmpwi(CCR0, R0, 0); 429// __ ble(CCR0, not_ok); 430// __ testbitdi(CCR0, R0, R0, Klass::_lh_instance_slow_path_bit); 431// __ beq(CCR0, ok); 432// 433// __ bind(not_ok); 434// __ stop("assert(can be fast path allocated)"); 435// __ bind(ok); 436// } 437//#endif // ASSERT 438// // We don't support eden allocation. 439// __ bind(slow_path); 440// } 441 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_instance), R4_ARG2); 442 } 443 break; 444 445 case counter_overflow_id: 446 // Bci and method are on stack. 447 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), 2); 448 break; 449 450 case new_type_array_id: 451 case new_object_array_id: 452 { 453 if (id == new_type_array_id) { 454 __ set_info("new_type_array", dont_gc_arguments); 455 } else { 456 __ set_info("new_object_array", dont_gc_arguments); 457 } 458 459#ifdef ASSERT 460 // Assert object type is really an array of the proper kind. 461 { 462 int tag = (id == new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value; 463 Label ok; 464 __ lwz(R0, in_bytes(Klass::layout_helper_offset()), R4_ARG2); 465 __ srawi(R0, R0, Klass::_lh_array_tag_shift); 466 __ cmpwi(CCR0, R0, tag); 467 __ beq(CCR0, ok); 468 __ stop("assert(is an array klass)"); 469 __ should_not_reach_here(); 470 __ bind(ok); 471 } 472#endif // ASSERT 473 474 // We don't support eden allocation. 475 476 if (id == new_type_array_id) { 477 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_type_array), R4_ARG2, R5_ARG3); 478 } else { 479 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_object_array), R4_ARG2, R5_ARG3); 480 } 481 } 482 break; 483 484 case new_multi_array_id: 485 { 486 // R4: klass 487 // R5: rank 488 // R6: address of 1st dimension 489 __ set_info("new_multi_array", dont_gc_arguments); 490 oop_maps = generate_stub_call(sasm, R3_RET, CAST_FROM_FN_PTR(address, new_multi_array), R4_ARG2, R5_ARG3, R6_ARG4); 491 } 492 break; 493 494 case register_finalizer_id: 495 { 496 __ set_info("register_finalizer", dont_gc_arguments); 497 // This code is called via rt_call. Hence, caller-save registers have been saved. 498 Register t = R11_scratch1; 499 500 // Load the klass and check the has finalizer flag. 501 __ load_klass(t, R3_ARG1); 502 __ lwz(t, in_bytes(Klass::access_flags_offset()), t); 503 __ testbitdi(CCR0, R0, t, exact_log2(JVM_ACC_HAS_FINALIZER)); 504 // Return if has_finalizer bit == 0 (CR0.eq). 505 __ bclr(Assembler::bcondCRbiIs1, Assembler::bi0(CCR0, Assembler::equal), Assembler::bhintbhBCLRisReturn); 506 507 __ mflr(R0); 508 __ std(R0, _abi(lr), R1_SP); 509 __ push_frame(frame::abi_reg_args_size, R0); // Empty dummy frame (no callee-save regs). 510 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord); 511 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0); 512 int call_offset = __ call_RT(noreg, noreg, 513 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), R3_ARG1); 514 oop_maps = new OopMapSet(); 515 oop_maps->add_gc_map(call_offset, oop_map); 516 517 __ pop_frame(); 518 __ ld(R0, _abi(lr), R1_SP); 519 __ mtlr(R0); 520 __ blr(); 521 } 522 break; 523 524 case throw_range_check_failed_id: 525 { 526 __ set_info("range_check_failed", dont_gc_arguments); // Arguments will be discarded. 527 __ std(R0, -8, R1_SP); // Pass index on stack. 528 oop_maps = generate_exception_throw_with_stack_parms(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), 1); 529 } 530 break; 531 532 case throw_index_exception_id: 533 { 534 __ set_info("index_range_check_failed", dont_gc_arguments); // Arguments will be discarded. 535 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 536 } 537 break; 538 539 case throw_div0_exception_id: 540 { 541 __ set_info("throw_div0_exception", dont_gc_arguments); 542 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 543 } 544 break; 545 546 case throw_null_pointer_exception_id: 547 { 548 __ set_info("throw_null_pointer_exception", dont_gc_arguments); 549 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 550 } 551 break; 552 553 case handle_exception_nofpu_id: 554 case handle_exception_id: 555 { 556 __ set_info("handle_exception", dont_gc_arguments); 557 oop_maps = generate_handle_exception(id, sasm); 558 } 559 break; 560 561 case handle_exception_from_callee_id: 562 { 563 __ set_info("handle_exception_from_callee", dont_gc_arguments); 564 oop_maps = generate_handle_exception(id, sasm); 565 } 566 break; 567 568 case unwind_exception_id: 569 { 570 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/, 571 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/, 572 Rexception_save = R31, Rcaller_sp = R30; 573 __ set_info("unwind_exception", dont_gc_arguments); 574 575 __ ld(Rcaller_sp, 0, R1_SP); 576 __ push_frame_reg_args(0, R0); // dummy frame for C call 577 __ mr(Rexception_save, Rexception); // save over C call 578 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc 579 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, Rexception_pc); 580 __ verify_not_null_oop(Rexception_save); 581 __ mtctr(R3_RET); 582 __ ld(Rexception_pc, _abi(lr), Rcaller_sp); // return pc 583 __ mr(R1_SP, Rcaller_sp); // Pop both frames at once. 584 __ mr(Rexception, Rexception_save); // restore 585 __ mtlr(Rexception_pc); 586 __ bctr(); 587 } 588 break; 589 590 case throw_array_store_exception_id: 591 { 592 __ set_info("throw_array_store_exception", dont_gc_arguments); 593 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 594 } 595 break; 596 597 case throw_class_cast_exception_id: 598 { 599 __ set_info("throw_class_cast_exception", dont_gc_arguments); 600 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 601 } 602 break; 603 604 case throw_incompatible_class_change_error_id: 605 { 606 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments); 607 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 608 } 609 break; 610 611 case slow_subtype_check_id: 612 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super ); 613 const Register sub_klass = R5, 614 super_klass = R4, 615 temp1_reg = R6, 616 temp2_reg = R0; 617 __ check_klass_subtype_slow_path(sub_klass, super_klass, temp1_reg, temp2_reg); // returns with CR0.eq if successful 618 __ crandc(CCR0, Assembler::equal, CCR0, Assembler::equal); // failed: CR0.ne 619 __ blr(); 620 } 621 break; 622 623 case monitorenter_nofpu_id: 624 case monitorenter_id: 625 { 626 __ set_info("monitorenter", dont_gc_arguments); 627 628 int save_fpu_registers = (id == monitorenter_id); 629 // Make a frame and preserve the caller's caller-save registers. 630 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 631 632 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), R4_ARG2, R5_ARG3); 633 634 oop_maps = new OopMapSet(); 635 oop_maps->add_gc_map(call_offset, oop_map); 636 637 restore_live_registers(sasm, noreg, noreg, save_fpu_registers); 638 __ blr(); 639 } 640 break; 641 642 case monitorexit_nofpu_id: 643 case monitorexit_id: 644 { 645 // note: Really a leaf routine but must setup last java sp 646 // => use call_RT for now (speed can be improved by 647 // doing last java sp setup manually). 648 __ set_info("monitorexit", dont_gc_arguments); 649 650 int save_fpu_registers = (id == monitorexit_id); 651 // Make a frame and preserve the caller's caller-save registers. 652 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 653 654 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), R4_ARG2); 655 656 oop_maps = new OopMapSet(); 657 oop_maps->add_gc_map(call_offset, oop_map); 658 659 restore_live_registers(sasm, noreg, noreg, save_fpu_registers); 660 __ blr(); 661 } 662 break; 663 664 case deoptimize_id: 665 { 666 __ set_info("deoptimize", dont_gc_arguments); 667 __ std(R0, -8, R1_SP); // Pass trap_request on stack. 668 oop_maps = stub_call_with_stack_parms(sasm, noreg, CAST_FROM_FN_PTR(address, deoptimize), 1, /*do_return*/ false); 669 670 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 671 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 672 address stub = deopt_blob->unpack_with_reexecution(); 673 //__ load_const_optimized(R0, stub); 674 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 675 __ mtctr(R0); 676 __ bctr(); 677 } 678 break; 679 680 case access_field_patching_id: 681 { 682 __ set_info("access_field_patching", dont_gc_arguments); 683 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 684 } 685 break; 686 687 case load_klass_patching_id: 688 { 689 __ set_info("load_klass_patching", dont_gc_arguments); 690 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 691 } 692 break; 693 694 case load_mirror_patching_id: 695 { 696 __ set_info("load_mirror_patching", dont_gc_arguments); 697 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 698 } 699 break; 700 701 case load_appendix_patching_id: 702 { 703 __ set_info("load_appendix_patching", dont_gc_arguments); 704 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 705 } 706 break; 707 708 case dtrace_object_alloc_id: 709 { // O0: object 710 __ unimplemented("stub dtrace_object_alloc_id"); 711 __ set_info("dtrace_object_alloc", dont_gc_arguments); 712// // We can't gc here so skip the oopmap but make sure that all 713// // the live registers get saved. 714// save_live_registers(sasm); 715// 716// __ save_thread(L7_thread_cache); 717// __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), 718// relocInfo::runtime_call_type); 719// __ delayed()->mov(I0, O0); 720// __ restore_thread(L7_thread_cache); 721// 722// restore_live_registers(sasm); 723// __ ret(); 724// __ delayed()->restore(); 725 } 726 break; 727 728#if INCLUDE_ALL_GCS 729 case g1_pre_barrier_slow_id: 730 { 731 BarrierSet* bs = Universe::heap()->barrier_set(); 732 if (bs->kind() != BarrierSet::G1SATBCTLogging) { 733 goto unimplemented_entry; 734 } 735 736 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments); 737 738 // Using stack slots: pre_val (pre-pushed), spill tmp, spill tmp2. 739 const int stack_slots = 3; 740 Register pre_val = R0; // previous value of memory 741 Register tmp = R14; 742 Register tmp2 = R15; 743 744 Label refill, restart, marking_not_active; 745 int satb_q_active_byte_offset = 746 in_bytes(JavaThread::satb_mark_queue_offset() + 747 SATBMarkQueue::byte_offset_of_active()); 748 int satb_q_index_byte_offset = 749 in_bytes(JavaThread::satb_mark_queue_offset() + 750 SATBMarkQueue::byte_offset_of_index()); 751 int satb_q_buf_byte_offset = 752 in_bytes(JavaThread::satb_mark_queue_offset() + 753 SATBMarkQueue::byte_offset_of_buf()); 754 755 // Spill 756 __ std(tmp, -16, R1_SP); 757 __ std(tmp2, -24, R1_SP); 758 759 // Is marking still active? 760 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) { 761 __ lwz(tmp, satb_q_active_byte_offset, R16_thread); 762 } else { 763 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption"); 764 __ lbz(tmp, satb_q_active_byte_offset, R16_thread); 765 } 766 __ cmpdi(CCR0, tmp, 0); 767 __ beq(CCR0, marking_not_active); 768 769 __ bind(restart); 770 // Load the index into the SATB buffer. SATBMarkQueue::_index is a 771 // size_t so ld_ptr is appropriate. 772 __ ld(tmp, satb_q_index_byte_offset, R16_thread); 773 774 // index == 0? 775 __ cmpdi(CCR0, tmp, 0); 776 __ beq(CCR0, refill); 777 778 __ ld(tmp2, satb_q_buf_byte_offset, R16_thread); 779 __ ld(pre_val, -8, R1_SP); // Load from stack. 780 __ addi(tmp, tmp, -oopSize); 781 782 __ std(tmp, satb_q_index_byte_offset, R16_thread); 783 __ stdx(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card> 784 785 __ bind(marking_not_active); 786 // Restore temp registers and return-from-leaf. 787 __ ld(tmp2, -24, R1_SP); 788 __ ld(tmp, -16, R1_SP); 789 __ blr(); 790 791 __ bind(refill); 792 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord; 793 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0 794 __ mflr(R0); 795 __ std(R0, _abi(lr), R1_SP); 796 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call 797 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), R16_thread); 798 __ pop_frame(); 799 __ ld(R0, _abi(lr), R1_SP); 800 __ mtlr(R0); 801 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 802 __ b(restart); 803 } 804 break; 805 806 case g1_post_barrier_slow_id: 807 { 808 BarrierSet* bs = Universe::heap()->barrier_set(); 809 if (bs->kind() != BarrierSet::G1SATBCTLogging) { 810 goto unimplemented_entry; 811 } 812 813 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments); 814 815 // Using stack slots: spill addr, spill tmp2 816 const int stack_slots = 2; 817 Register tmp = R0; 818 Register addr = R14; 819 Register tmp2 = R15; 820 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base; 821 822 Label restart, refill, ret; 823 824 // Spill 825 __ std(addr, -8, R1_SP); 826 __ std(tmp2, -16, R1_SP); 827 828 __ srdi(addr, R0, CardTableModRefBS::card_shift); // Addr is passed in R0. 829 __ load_const_optimized(/*cardtable*/ tmp2, byte_map_base, tmp); 830 __ add(addr, tmp2, addr); 831 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable] 832 833 // Return if young card. 834 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::g1_young_card_val()); 835 __ beq(CCR0, ret); 836 837 // Return if sequential consistent value is already dirty. 838 __ membar(Assembler::StoreLoad); 839 __ lbz(tmp, 0, addr); // tmp := [addr + cardtable] 840 841 __ cmpwi(CCR0, tmp, G1SATBCardTableModRefBS::dirty_card_val()); 842 __ beq(CCR0, ret); 843 844 // Not dirty. 845 846 // First, dirty it. 847 __ li(tmp, G1SATBCardTableModRefBS::dirty_card_val()); 848 __ stb(tmp, 0, addr); 849 850 int dirty_card_q_index_byte_offset = 851 in_bytes(JavaThread::dirty_card_queue_offset() + 852 DirtyCardQueue::byte_offset_of_index()); 853 int dirty_card_q_buf_byte_offset = 854 in_bytes(JavaThread::dirty_card_queue_offset() + 855 DirtyCardQueue::byte_offset_of_buf()); 856 857 __ bind(restart); 858 859 // Get the index into the update buffer. DirtyCardQueue::_index is 860 // a size_t so ld_ptr is appropriate here. 861 __ ld(tmp2, dirty_card_q_index_byte_offset, R16_thread); 862 863 // index == 0? 864 __ cmpdi(CCR0, tmp2, 0); 865 __ beq(CCR0, refill); 866 867 __ ld(tmp, dirty_card_q_buf_byte_offset, R16_thread); 868 __ addi(tmp2, tmp2, -oopSize); 869 870 __ std(tmp2, dirty_card_q_index_byte_offset, R16_thread); 871 __ add(tmp2, tmp, tmp2); 872 __ std(addr, 0, tmp2); // [_buf + index] := <address_of_card> 873 874 // Restore temp registers and return-from-leaf. 875 __ bind(ret); 876 __ ld(tmp2, -16, R1_SP); 877 __ ld(addr, -8, R1_SP); 878 __ blr(); 879 880 __ bind(refill); 881 const int nbytes_save = (MacroAssembler::num_volatile_regs + stack_slots) * BytesPerWord; 882 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0 883 __ mflr(R0); 884 __ std(R0, _abi(lr), R1_SP); 885 __ push_frame_reg_args(nbytes_save, R0); // dummy frame for C call 886 __ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), R16_thread); 887 __ pop_frame(); 888 __ ld(R0, _abi(lr), R1_SP); 889 __ mtlr(R0); 890 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 891 __ b(restart); 892 } 893 break; 894#endif // INCLUDE_ALL_GCS 895 896 case predicate_failed_trap_id: 897 { 898 __ set_info("predicate_failed_trap", dont_gc_arguments); 899 OopMap* oop_map = save_live_registers(sasm); 900 901 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 902 903 oop_maps = new OopMapSet(); 904 oop_maps->add_gc_map(call_offset, oop_map); 905 906 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 907 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 908 restore_live_registers(sasm, noreg, noreg); 909 910 address stub = deopt_blob->unpack_with_reexecution(); 911 //__ load_const_optimized(R0, stub); 912 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 913 __ mtctr(R0); 914 __ bctr(); 915 } 916 break; 917 918 default: 919 unimplemented_entry: 920 { 921 __ set_info("unimplemented entry", dont_gc_arguments); 922 __ mflr(R0); 923 __ std(R0, _abi(lr), R1_SP); 924 __ push_frame(frame::abi_reg_args_size, R0); // empty dummy frame 925 sasm->set_frame_size(frame::abi_reg_args_size / BytesPerWord); 926 OopMap* oop_map = new OopMap(frame::abi_reg_args_size / sizeof(jint), 0); 927 928 __ load_const_optimized(R4_ARG2, (int)id); 929 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), R4_ARG2); 930 931 oop_maps = new OopMapSet(); 932 oop_maps->add_gc_map(call_offset, oop_map); 933 __ should_not_reach_here(); 934 } 935 break; 936 } 937 return oop_maps; 938} 939 940 941OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) { 942 __ block_comment("generate_handle_exception"); 943 944 // Save registers, if required. 945 OopMapSet* oop_maps = new OopMapSet(); 946 OopMap* oop_map = NULL; 947 const Register Rexception = R3 /*LIRGenerator::exceptionOopOpr()*/, 948 Rexception_pc = R4 /*LIRGenerator::exceptionPcOpr()*/; 949 950 switch (id) { 951 case forward_exception_id: 952 // We're handling an exception in the context of a compiled frame. 953 // The registers have been saved in the standard places. Perform 954 // an exception lookup in the caller and dispatch to the handler 955 // if found. Otherwise unwind and dispatch to the callers 956 // exception handler. 957 oop_map = generate_oop_map(sasm, true); 958 // Transfer the pending exception to the exception_oop. 959 // Also load the PC which is typically at SP + frame_size_in_bytes + _abi(lr), 960 // but we support additional slots in the frame for parameter passing. 961 __ ld(Rexception_pc, 0, R1_SP); 962 __ ld(Rexception, in_bytes(JavaThread::pending_exception_offset()), R16_thread); 963 __ li(R0, 0); 964 __ ld(Rexception_pc, _abi(lr), Rexception_pc); 965 __ std(R0, in_bytes(JavaThread::pending_exception_offset()), R16_thread); 966 break; 967 case handle_exception_nofpu_id: 968 case handle_exception_id: 969 // At this point all registers MAY be live. 970 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Rexception_pc); 971 break; 972 case handle_exception_from_callee_id: 973 // At this point all registers except exception oop and exception pc are dead. 974 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); 975 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 976 __ std(Rexception_pc, _abi(lr), R1_SP); 977 __ push_frame(frame_size_in_bytes, R0); 978 break; 979 default: ShouldNotReachHere(); 980 } 981 982 __ verify_not_null_oop(Rexception); 983 984#ifdef ASSERT 985 // Check that fields in JavaThread for exception oop and issuing pc are 986 // empty before writing to them. 987 __ ld(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread); 988 __ cmpdi(CCR0, R0, 0); 989 __ asm_assert_eq("exception oop already set", 0x963); 990 __ ld(R0, in_bytes(JavaThread::exception_pc_offset() ), R16_thread); 991 __ cmpdi(CCR0, R0, 0); 992 __ asm_assert_eq("exception pc already set", 0x962); 993#endif 994 995 // Save the exception and issuing pc in the thread. 996 __ std(Rexception, in_bytes(JavaThread::exception_oop_offset()), R16_thread); 997 __ std(Rexception_pc, in_bytes(JavaThread::exception_pc_offset() ), R16_thread); 998 999 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 1000 oop_maps->add_gc_map(call_offset, oop_map); 1001 1002 __ mtctr(R3_RET); 1003 1004 // Note: if nmethod has been deoptimized then regardless of 1005 // whether it had a handler or not we will deoptimize 1006 // by entering the deopt blob with a pending exception. 1007 1008 // Restore the registers that were saved at the beginning, remove 1009 // the frame and jump to the exception handler. 1010 switch (id) { 1011 case forward_exception_id: 1012 case handle_exception_nofpu_id: 1013 case handle_exception_id: 1014 restore_live_registers(sasm, noreg, noreg, id != handle_exception_nofpu_id); 1015 __ bctr(); 1016 break; 1017 case handle_exception_from_callee_id: { 1018 __ pop_frame(); 1019 __ ld(Rexception_pc, _abi(lr), R1_SP); 1020 __ mtlr(Rexception_pc); 1021 __ bctr(); 1022 break; 1023 } 1024 default: ShouldNotReachHere(); 1025 } 1026 1027 return oop_maps; 1028} 1029 1030const char *Runtime1::pd_name_for_address(address entry) { 1031 return "<unknown function>"; 1032} 1033 1034#undef __ 1035