1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2018 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_CodeStubs.hpp" 29 #include "c1/c1_FrameMap.hpp" 30 #include "c1/c1_LIRAssembler.hpp" 31 #include "c1/c1_MacroAssembler.hpp" 32 #include "c1/c1_Runtime1.hpp" 33 #include "nativeInst_ppc.hpp" 34 #include "runtime/sharedRuntime.hpp" 35 #include "utilities/macros.hpp" 36 #include "vmreg_ppc.inline.hpp" 37 38 #define __ ce->masm()-> 39 40 41 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array) 42 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) { 43 assert(info != NULL, "must have info"); 44 _info = new CodeEmitInfo(info); 45 } 46 47 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index) 48 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) { 49 assert(info != NULL, "must have info"); 50 _info = new CodeEmitInfo(info); 51 } 52 53 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 54 __ bind(_entry); 55 56 if (_info->deoptimize_on_exception()) { 57 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 58 // May be used by optimizations like LoopInvariantCodeMotion or RangeCheckEliminator. 59 DEBUG_ONLY( __ untested("RangeCheckStub: predicate_failed_trap_id"); ) 60 //__ load_const_optimized(R0, a); 61 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a)); 62 __ mtctr(R0); 63 __ bctrl(); 64 ce->add_call_info_here(_info); 65 ce->verify_oop_map(_info); 66 debug_only(__ illtrap()); 67 return; 68 } 69 70 address stub = _throw_index_out_of_bounds_exception ? Runtime1::entry_for(Runtime1::throw_index_exception_id) 71 : Runtime1::entry_for(Runtime1::throw_range_check_failed_id); 72 //__ load_const_optimized(R0, stub); 73 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 74 __ mtctr(R0); 75 76 Register index = R0; 77 if (_index->is_register()) { 78 __ extsw(index, _index->as_register()); 79 } else { 80 __ load_const_optimized(index, _index->as_jint()); 81 } 82 if (_array) { 83 __ std(_array->as_pointer_register(), -8, R1_SP); 84 } 85 __ std(index, -16, R1_SP); 86 87 __ bctrl(); 88 ce->add_call_info_here(_info); 89 ce->verify_oop_map(_info); 90 debug_only(__ illtrap()); 91 } 92 93 94 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 95 _info = new CodeEmitInfo(info); 96 } 97 98 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 99 __ bind(_entry); 100 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 101 //__ load_const_optimized(R0, a); 102 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a)); 103 __ mtctr(R0); 104 __ bctrl(); 105 ce->add_call_info_here(_info); 106 ce->verify_oop_map(_info); 107 debug_only(__ illtrap()); 108 } 109 110 111 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 112 __ bind(_entry); 113 114 // Parameter 1: bci 115 __ load_const_optimized(R0, _bci); 116 __ std(R0, -16, R1_SP); 117 118 // Parameter 2: Method* 119 Metadata *m = _method->as_constant_ptr()->as_metadata(); 120 AddressLiteral md = __ constant_metadata_address(m); // Notify OOP recorder (don't need the relocation). 121 __ load_const_optimized(R0, md.value()); 122 __ std(R0, -8, R1_SP); 123 124 address a = Runtime1::entry_for(Runtime1::counter_overflow_id); 125 //__ load_const_optimized(R0, a); 126 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a)); 127 __ mtctr(R0); 128 __ bctrl(); 129 ce->add_call_info_here(_info); 130 ce->verify_oop_map(_info); 131 132 __ b(_continuation); 133 } 134 135 136 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 137 if (_offset != -1) { 138 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 139 } 140 __ bind(_entry); 141 address stub = Runtime1::entry_for(Runtime1::throw_div0_exception_id); 142 //__ load_const_optimized(R0, stub); 143 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 144 __ mtctr(R0); 145 __ bctrl(); 146 ce->add_call_info_here(_info); 147 ce->verify_oop_map(_info); 148 debug_only(__ illtrap()); 149 } 150 151 152 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 153 address a; 154 if (_info->deoptimize_on_exception()) { 155 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. 156 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 157 } else { 158 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 159 } 160 161 if (ImplicitNullChecks || TrapBasedNullChecks) { 162 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 163 } 164 __ bind(_entry); 165 //__ load_const_optimized(R0, a); 166 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a)); 167 __ mtctr(R0); 168 __ bctrl(); 169 ce->add_call_info_here(_info); 170 ce->verify_oop_map(_info); 171 debug_only(__ illtrap()); 172 } 173 174 175 // Implementation of SimpleExceptionStub 176 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 177 __ bind(_entry); 178 address stub = Runtime1::entry_for(_stub); 179 //__ load_const_optimized(R0, stub); 180 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 181 if (_obj->is_valid()) { __ mr_if_needed(/*tmp1 in do_CheckCast*/ R4_ARG2, _obj->as_register()); } 182 __ mtctr(R0); 183 __ bctrl(); 184 ce->add_call_info_here(_info); 185 debug_only( __ illtrap(); ) 186 } 187 188 189 // Implementation of NewInstanceStub 190 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 191 _result = result; 192 _klass = klass; 193 _klass_reg = klass_reg; 194 _info = new CodeEmitInfo(info); 195 assert(stub_id == Runtime1::new_instance_id || 196 stub_id == Runtime1::fast_new_instance_id || 197 stub_id == Runtime1::fast_new_instance_init_check_id, 198 "need new_instance id"); 199 _stub_id = stub_id; 200 } 201 202 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 203 __ bind(_entry); 204 205 address entry = Runtime1::entry_for(_stub_id); 206 //__ load_const_optimized(R0, entry); 207 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry)); 208 __ mtctr(R0); 209 __ bctrl(); 210 ce->add_call_info_here(_info); 211 ce->verify_oop_map(_info); 212 __ b(_continuation); 213 } 214 215 216 // Implementation of NewTypeArrayStub 217 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 218 _klass_reg = klass_reg; 219 _length = length; 220 _result = result; 221 _info = new CodeEmitInfo(info); 222 } 223 224 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 225 __ bind(_entry); 226 227 address entry = Runtime1::entry_for(Runtime1::new_type_array_id); 228 //__ load_const_optimized(R0, entry); 229 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry)); 230 __ mr_if_needed(/*op->tmp1()->as_register()*/ R5_ARG3, _length->as_register()); // already sign-extended 231 __ mtctr(R0); 232 __ bctrl(); 233 ce->add_call_info_here(_info); 234 ce->verify_oop_map(_info); 235 __ b(_continuation); 236 } 237 238 239 // Implementation of NewObjectArrayStub 240 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 241 _klass_reg = klass_reg; 242 _length = length; 243 _result = result; 244 _info = new CodeEmitInfo(info); 245 } 246 247 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 248 __ bind(_entry); 249 250 address entry = Runtime1::entry_for(Runtime1::new_object_array_id); 251 //__ load_const_optimized(R0, entry); 252 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry)); 253 __ mr_if_needed(/*op->tmp1()->as_register()*/ R5_ARG3, _length->as_register()); // already sign-extended 254 __ mtctr(R0); 255 __ bctrl(); 256 ce->add_call_info_here(_info); 257 ce->verify_oop_map(_info); 258 __ b(_continuation); 259 } 260 261 262 // Implementation of MonitorAccessStubs 263 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) 264 : MonitorAccessStub(obj_reg, lock_reg) { 265 _info = new CodeEmitInfo(info); 266 } 267 268 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 269 __ bind(_entry); 270 address stub = Runtime1::entry_for(ce->compilation()->has_fpu_code() ? Runtime1::monitorenter_id : Runtime1::monitorenter_nofpu_id); 271 //__ load_const_optimized(R0, stub); 272 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 273 __ mr_if_needed(/*scratch_opr()->as_register()*/ R4_ARG2, _obj_reg->as_register()); 274 assert(_lock_reg->as_register() == R5_ARG3, ""); 275 __ mtctr(R0); 276 __ bctrl(); 277 ce->add_call_info_here(_info); 278 ce->verify_oop_map(_info); 279 __ b(_continuation); 280 } 281 282 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 283 __ bind(_entry); 284 if (_compute_lock) { 285 ce->monitor_address(_monitor_ix, _lock_reg); 286 } 287 address stub = Runtime1::entry_for(ce->compilation()->has_fpu_code() ? Runtime1::monitorexit_id : Runtime1::monitorexit_nofpu_id); 288 //__ load_const_optimized(R0, stub); 289 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 290 assert(_lock_reg->as_register() == R4_ARG2, ""); 291 __ mtctr(R0); 292 __ bctrl(); 293 __ b(_continuation); 294 } 295 296 297 // Implementation of patching: 298 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes). 299 // - Replace original code with a call to the stub. 300 // At Runtime: 301 // - call to stub, jump to runtime 302 // - in runtime: preserve all registers (especially objects, i.e., source and destination object) 303 // - in runtime: after initializing class, restore original code, reexecute instruction 304 305 int PatchingStub::_patch_info_offset = -(5 * BytesPerInstWord); 306 307 void PatchingStub::align_patch_site(MacroAssembler* ) { 308 // Patch sites on ppc are always properly aligned. 309 } 310 311 #ifdef ASSERT 312 inline void compare_with_patch_site(address template_start, address pc_start, int bytes_to_copy) { 313 address start = template_start; 314 for (int i = 0; i < bytes_to_copy; i++) { 315 address ptr = (address)(pc_start + i); 316 int a_byte = (*ptr) & 0xFF; 317 assert(a_byte == *start++, "should be the same code"); 318 } 319 } 320 #endif 321 322 void PatchingStub::emit_code(LIR_Assembler* ce) { 323 // copy original code here 324 assert(NativeGeneralJump::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, 325 "not enough room for call, need %d", _bytes_to_copy); 326 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes"); 327 328 Label call_patch; 329 330 int being_initialized_entry = __ offset(); 331 332 if (_id == load_klass_id) { 333 // Produce a copy of the load klass instruction for use by the being initialized case. 334 AddressLiteral addrlit((address)NULL, metadata_Relocation::spec(_index)); 335 __ load_const(_obj, addrlit, R0); 336 DEBUG_ONLY( compare_with_patch_site(__ code_section()->start() + being_initialized_entry, _pc_start, _bytes_to_copy); ) 337 } else if (_id == load_mirror_id || _id == load_appendix_id) { 338 // Produce a copy of the load mirror instruction for use by the being initialized case. 339 AddressLiteral addrlit((address)NULL, oop_Relocation::spec(_index)); 340 __ load_const(_obj, addrlit, R0); 341 DEBUG_ONLY( compare_with_patch_site(__ code_section()->start() + being_initialized_entry, _pc_start, _bytes_to_copy); ) 342 } else { 343 // Make a copy of the code which is going to be patched. 344 for (int i = 0; i < _bytes_to_copy; i++) { 345 address ptr = (address)(_pc_start + i); 346 int a_byte = (*ptr) & 0xFF; 347 __ emit_int8 (a_byte); 348 } 349 } 350 351 address end_of_patch = __ pc(); 352 int bytes_to_skip = 0; 353 if (_id == load_mirror_id) { 354 int offset = __ offset(); 355 __ block_comment(" being_initialized check"); 356 357 // Static field accesses have special semantics while the class 358 // initializer is being run so we emit a test which can be used to 359 // check that this code is being executed by the initializing 360 // thread. 361 assert(_obj != noreg, "must be a valid register"); 362 assert(_index >= 0, "must have oop index"); 363 __ mr(R0, _obj); // spill 364 __ ld(_obj, java_lang_Class::klass_offset_in_bytes(), _obj); 365 __ ld(_obj, in_bytes(InstanceKlass::init_thread_offset()), _obj); 366 __ cmpd(CCR0, _obj, R16_thread); 367 __ mr(_obj, R0); // restore 368 __ bne(CCR0, call_patch); 369 370 // Load_klass patches may execute the patched code before it's 371 // copied back into place so we need to jump back into the main 372 // code of the nmethod to continue execution. 373 __ b(_patch_site_continuation); 374 375 // Make sure this extra code gets skipped. 376 bytes_to_skip += __ offset() - offset; 377 } 378 379 // Now emit the patch record telling the runtime how to find the 380 // pieces of the patch. We only need 3 bytes but it has to be 381 // aligned as an instruction so emit 4 bytes. 382 int sizeof_patch_record = 4; 383 bytes_to_skip += sizeof_patch_record; 384 385 // Emit the offsets needed to find the code to patch. 386 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; 387 388 // Emit the patch record. We need to emit a full word, so emit an extra empty byte. 389 __ emit_int8(0); 390 __ emit_int8(being_initialized_entry_offset); 391 __ emit_int8(bytes_to_skip); 392 __ emit_int8(_bytes_to_copy); 393 address patch_info_pc = __ pc(); 394 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 395 396 address entry = __ pc(); 397 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 398 address target = NULL; 399 relocInfo::relocType reloc_type = relocInfo::none; 400 switch (_id) { 401 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 402 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); 403 reloc_type = relocInfo::metadata_type; break; 404 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); 405 reloc_type = relocInfo::oop_type; break; 406 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); 407 reloc_type = relocInfo::oop_type; break; 408 default: ShouldNotReachHere(); 409 } 410 __ bind(call_patch); 411 412 __ block_comment("patch entry point"); 413 //__ load_const(R0, target); + mtctr + bctrl must have size -_patch_info_offset 414 __ load_const32(R0, MacroAssembler::offset_to_global_toc(target)); 415 __ add(R0, R29_TOC, R0); 416 __ mtctr(R0); 417 __ bctrl(); 418 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 419 ce->add_call_info_here(_info); 420 __ b(_patch_site_entry); 421 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { 422 CodeSection* cs = __ code_section(); 423 address pc = (address)_pc_start; 424 RelocIterator iter(cs, pc, pc + 1); 425 relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none); 426 } 427 } 428 429 430 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 431 __ bind(_entry); 432 address stub = Runtime1::entry_for(Runtime1::deoptimize_id); 433 //__ load_const_optimized(R0, stub); 434 __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub)); 435 __ mtctr(R0); 436 437 __ load_const_optimized(R0, _trap_request); // Pass trap request in R0. 438 __ bctrl(); 439 ce->add_call_info_here(_info); 440 debug_only(__ illtrap()); 441 } 442 443 444 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 445 //---------------slow case: call to native----------------- 446 __ bind(_entry); 447 __ mr(R3_ARG1, src()->as_register()); 448 __ extsw(R4_ARG2, src_pos()->as_register()); 449 __ mr(R5_ARG3, dst()->as_register()); 450 __ extsw(R6_ARG4, dst_pos()->as_register()); 451 __ extsw(R7_ARG5, length()->as_register()); 452 453 ce->emit_static_call_stub(); 454 455 bool success = ce->emit_trampoline_stub_for_call(SharedRuntime::get_resolve_static_call_stub()); 456 if (!success) { return; } 457 458 __ relocate(relocInfo::static_call_type); 459 // Note: At this point we do not have the address of the trampoline 460 // stub, and the entry point might be too far away for bl, so __ pc() 461 // serves as dummy and the bl will be patched later. 462 __ code()->set_insts_mark(); 463 __ bl(__ pc()); 464 ce->add_call_info_here(info()); 465 ce->verify_oop_map(info()); 466 467 #ifndef PRODUCT 468 const address counter = (address)&Runtime1::_arraycopy_slowcase_cnt; 469 const Register tmp = R3, tmp2 = R4; 470 int simm16_offs = __ load_const_optimized(tmp, counter, tmp2, true); 471 __ lwz(tmp2, simm16_offs, tmp); 472 __ addi(tmp2, tmp2, 1); 473 __ stw(tmp2, simm16_offs, tmp); 474 #endif 475 476 __ b(_continuation); 477 } 478 479 #undef __