quick_entrypoints_arm64.S revision 0a87a653a296854c9a0abacd9bb1557ee4c4d05d
1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "asm_support_arm64.S" 18 19#include "arch/quick_alloc_entrypoints.S" 20 21 22.macro INCREASE_FRAME frame_adjustment 23 sub sp, sp, #(\frame_adjustment) 24 .cfi_adjust_cfa_offset (\frame_adjustment) 25.endm 26 27.macro DECREASE_FRAME frame_adjustment 28 add sp, sp, #(\frame_adjustment) 29 .cfi_adjust_cfa_offset -(\frame_adjustment) 30.endm 31 32.macro SAVE_REG reg, offset 33 str \reg, [sp, #(\offset)] 34 .cfi_rel_offset \reg, (\offset) 35.endm 36 37.macro RESTORE_REG reg, offset 38 ldr \reg, [sp, #(\offset)] 39 .cfi_restore \reg 40.endm 41 42.macro SAVE_REG_INCREASE_FRAME reg, frame_adjustment 43 str \reg, [sp, #-(\frame_adjustment)]! 44 .cfi_adjust_cfa_offset (\frame_adjustment) 45 .cfi_rel_offset \reg, 0 46.endm 47 48.macro RESTORE_REG_DECREASE_FRAME reg, frame_adjustment 49 ldr \reg, [sp], #(\frame_adjustment) 50 .cfi_restore \reg 51 .cfi_adjust_cfa_offset -(\frame_adjustment) 52.endm 53 54.macro SAVE_TWO_REGS reg1, reg2, offset 55 stp \reg1, \reg2, [sp, #(\offset)] 56 .cfi_rel_offset \reg1, (\offset) 57 .cfi_rel_offset \reg2, (\offset) + 8 58.endm 59 60.macro RESTORE_TWO_REGS reg1, reg2, offset 61 ldp \reg1, \reg2, [sp, #(\offset)] 62 .cfi_restore \reg1 63 .cfi_restore \reg2 64.endm 65 66.macro SAVE_TWO_REGS_INCREASE_FRAME reg1, reg2, frame_adjustment 67 stp \reg1, \reg2, [sp, #-(\frame_adjustment)]! 68 .cfi_adjust_cfa_offset (\frame_adjustment) 69 .cfi_rel_offset \reg1, 0 70 .cfi_rel_offset \reg2, 8 71.endm 72 73.macro RESTORE_TWO_REGS_DECREASE_FRAME reg1, reg2, frame_adjustment 74 ldp \reg1, \reg2, [sp], #(\frame_adjustment) 75 .cfi_restore \reg1 76 .cfi_restore \reg2 77 .cfi_adjust_cfa_offset -(\frame_adjustment) 78.endm 79 80 /* 81 * Macro that sets up the callee save frame to conform with 82 * Runtime::CreateCalleeSaveMethod(kSaveAllCalleeSaves) 83 */ 84.macro SETUP_SAVE_ALL_CALLEE_SAVES_FRAME 85 // art::Runtime** xIP0 = &art::Runtime::instance_ 86 adrp xIP0, :got:_ZN3art7Runtime9instance_E 87 ldr xIP0, [xIP0, #:got_lo12:_ZN3art7Runtime9instance_E] 88 89 // Our registers aren't intermixed - just spill in order. 90 ldr xIP0, [xIP0] // art::Runtime* xIP0 = art::Runtime::instance_; 91 92 // ArtMethod* xIP0 = Runtime::instance_->callee_save_methods_[kSaveAllCalleeSaves]; 93 ldr xIP0, [xIP0, RUNTIME_SAVE_ALL_CALLEE_SAVES_METHOD_OFFSET] 94 95 INCREASE_FRAME 176 96 97 // Ugly compile-time check, but we only have the preprocessor. 98#if (FRAME_SIZE_SAVE_ALL_CALLEE_SAVES != 176) 99#error "FRAME_SIZE_SAVE_ALL_CALLEE_SAVES(ARM64) size not as expected." 100#endif 101 102 // Stack alignment filler [sp, #8]. 103 // FP callee-saves. 104 stp d8, d9, [sp, #16] 105 stp d10, d11, [sp, #32] 106 stp d12, d13, [sp, #48] 107 stp d14, d15, [sp, #64] 108 109 // GP callee-saves 110 SAVE_TWO_REGS x19, x20, 80 111 SAVE_TWO_REGS x21, x22, 96 112 SAVE_TWO_REGS x23, x24, 112 113 SAVE_TWO_REGS x25, x26, 128 114 SAVE_TWO_REGS x27, x28, 144 115 SAVE_TWO_REGS x29, xLR, 160 116 117 // Store ArtMethod* Runtime::callee_save_methods_[kSaveAllCalleeSaves]. 118 str xIP0, [sp] 119 // Place sp in Thread::Current()->top_quick_frame. 120 mov xIP0, sp 121 str xIP0, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 122.endm 123 124 /* 125 * Macro that sets up the callee save frame to conform with 126 * Runtime::CreateCalleeSaveMethod(kSaveRefsOnly). 127 */ 128.macro SETUP_SAVE_REFS_ONLY_FRAME 129 // art::Runtime** xIP0 = &art::Runtime::instance_ 130 adrp xIP0, :got:_ZN3art7Runtime9instance_E 131 ldr xIP0, [xIP0, #:got_lo12:_ZN3art7Runtime9instance_E] 132 133 // Our registers aren't intermixed - just spill in order. 134 ldr xIP0, [xIP0] // art::Runtime* xIP0 = art::Runtime::instance_; 135 136 // ArtMethod* xIP0 = Runtime::instance_->callee_save_methods_[kSaveRefOnly]; 137 ldr xIP0, [xIP0, RUNTIME_SAVE_REFS_ONLY_METHOD_OFFSET] 138 139 INCREASE_FRAME 96 140 141 // Ugly compile-time check, but we only have the preprocessor. 142#if (FRAME_SIZE_SAVE_REFS_ONLY != 96) 143#error "FRAME_SIZE_SAVE_REFS_ONLY(ARM64) size not as expected." 144#endif 145 146 // GP callee-saves. 147 // x20 paired with ArtMethod* - see below. 148 SAVE_TWO_REGS x21, x22, 16 149 SAVE_TWO_REGS x23, x24, 32 150 SAVE_TWO_REGS x25, x26, 48 151 SAVE_TWO_REGS x27, x28, 64 152 SAVE_TWO_REGS x29, xLR, 80 153 154 // Store ArtMethod* Runtime::callee_save_methods_[kSaveRefsOnly]. 155 // Note: We could avoid saving X20 in the case of Baker read 156 // barriers, as it is overwritten by REFRESH_MARKING_REGISTER 157 // later; but it's not worth handling this special case. 158 stp xIP0, x20, [sp] 159 .cfi_rel_offset x20, 8 160 161 // Place sp in Thread::Current()->top_quick_frame. 162 mov xIP0, sp 163 str xIP0, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 164.endm 165 166// TODO: Probably no need to restore registers preserved by aapcs64. 167.macro RESTORE_SAVE_REFS_ONLY_FRAME 168 // Callee-saves. 169 // Note: Likewise, we could avoid restoring X20 in the case of Baker 170 // read barriers, as it is overwritten by REFRESH_MARKING_REGISTER 171 // later; but it's not worth handling this special case. 172 RESTORE_REG x20, 8 173 RESTORE_TWO_REGS x21, x22, 16 174 RESTORE_TWO_REGS x23, x24, 32 175 RESTORE_TWO_REGS x25, x26, 48 176 RESTORE_TWO_REGS x27, x28, 64 177 RESTORE_TWO_REGS x29, xLR, 80 178 179 DECREASE_FRAME 96 180.endm 181 182.macro POP_SAVE_REFS_ONLY_FRAME 183 DECREASE_FRAME 96 184.endm 185 186 187.macro SETUP_SAVE_REFS_AND_ARGS_FRAME_INTERNAL 188 INCREASE_FRAME 224 189 190 // Ugly compile-time check, but we only have the preprocessor. 191#if (FRAME_SIZE_SAVE_REFS_AND_ARGS != 224) 192#error "FRAME_SIZE_SAVE_REFS_AND_ARGS(ARM64) size not as expected." 193#endif 194 195 // Stack alignment filler [sp, #8]. 196 // FP args. 197 stp d0, d1, [sp, #16] 198 stp d2, d3, [sp, #32] 199 stp d4, d5, [sp, #48] 200 stp d6, d7, [sp, #64] 201 202 // Core args. 203 SAVE_TWO_REGS x1, x2, 80 204 SAVE_TWO_REGS x3, x4, 96 205 SAVE_TWO_REGS x5, x6, 112 206 207 // x7, Callee-saves. 208 // Note: We could avoid saving X20 in the case of Baker read 209 // barriers, as it is overwritten by REFRESH_MARKING_REGISTER 210 // later; but it's not worth handling this special case. 211 SAVE_TWO_REGS x7, x20, 128 212 SAVE_TWO_REGS x21, x22, 144 213 SAVE_TWO_REGS x23, x24, 160 214 SAVE_TWO_REGS x25, x26, 176 215 SAVE_TWO_REGS x27, x28, 192 216 217 // x29(callee-save) and LR. 218 SAVE_TWO_REGS x29, xLR, 208 219 220.endm 221 222 /* 223 * Macro that sets up the callee save frame to conform with 224 * Runtime::CreateCalleeSaveMethod(kSaveRefsAndArgs). 225 * 226 * TODO This is probably too conservative - saving FP & LR. 227 */ 228.macro SETUP_SAVE_REFS_AND_ARGS_FRAME 229 // art::Runtime** xIP0 = &art::Runtime::instance_ 230 adrp xIP0, :got:_ZN3art7Runtime9instance_E 231 ldr xIP0, [xIP0, #:got_lo12:_ZN3art7Runtime9instance_E] 232 233 // Our registers aren't intermixed - just spill in order. 234 ldr xIP0, [xIP0] // art::Runtime* xIP0 = art::Runtime::instance_; 235 236 // ArtMethod* xIP0 = Runtime::instance_->callee_save_methods_[kSaveRefAndArgs]; 237 ldr xIP0, [xIP0, RUNTIME_SAVE_REFS_AND_ARGS_METHOD_OFFSET] 238 239 SETUP_SAVE_REFS_AND_ARGS_FRAME_INTERNAL 240 241 str xIP0, [sp] // Store ArtMethod* Runtime::callee_save_methods_[kSaveRefsAndArgs]. 242 // Place sp in Thread::Current()->top_quick_frame. 243 mov xIP0, sp 244 str xIP0, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 245.endm 246 247.macro SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_X0 248 SETUP_SAVE_REFS_AND_ARGS_FRAME_INTERNAL 249 str x0, [sp, #0] // Store ArtMethod* to bottom of stack. 250 // Place sp in Thread::Current()->top_quick_frame. 251 mov xIP0, sp 252 str xIP0, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 253.endm 254 255// TODO: Probably no need to restore registers preserved by aapcs64. 256.macro RESTORE_SAVE_REFS_AND_ARGS_FRAME 257 // FP args. 258 ldp d0, d1, [sp, #16] 259 ldp d2, d3, [sp, #32] 260 ldp d4, d5, [sp, #48] 261 ldp d6, d7, [sp, #64] 262 263 // Core args. 264 RESTORE_TWO_REGS x1, x2, 80 265 RESTORE_TWO_REGS x3, x4, 96 266 RESTORE_TWO_REGS x5, x6, 112 267 268 // x7, Callee-saves. 269 // Note: Likewise, we could avoid restoring X20 in the case of Baker 270 // read barriers, as it is overwritten by REFRESH_MARKING_REGISTER 271 // later; but it's not worth handling this special case. 272 RESTORE_TWO_REGS x7, x20, 128 273 RESTORE_TWO_REGS x21, x22, 144 274 RESTORE_TWO_REGS x23, x24, 160 275 RESTORE_TWO_REGS x25, x26, 176 276 RESTORE_TWO_REGS x27, x28, 192 277 278 // x29(callee-save) and LR. 279 RESTORE_TWO_REGS x29, xLR, 208 280 281 DECREASE_FRAME 224 282.endm 283 284 /* 285 * Macro that sets up the callee save frame to conform with 286 * Runtime::CreateCalleeSaveMethod(kSaveEverything) 287 * when the SP has already been decremented by FRAME_SIZE_SAVE_EVERYTHING 288 * and saving registers x29 and LR is handled elsewhere. 289 */ 290.macro SETUP_SAVE_EVERYTHING_FRAME_DECREMENTED_SP_SKIP_X29_LR runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET 291 // Ugly compile-time check, but we only have the preprocessor. 292#if (FRAME_SIZE_SAVE_EVERYTHING != 512) 293#error "FRAME_SIZE_SAVE_EVERYTHING(ARM64) size not as expected." 294#endif 295 296 // Save FP registers. 297 // For better performance, store d0 and d31 separately, so that all STPs are 16-byte aligned. 298 str d0, [sp, #8] 299 stp d1, d2, [sp, #16] 300 stp d3, d4, [sp, #32] 301 stp d5, d6, [sp, #48] 302 stp d7, d8, [sp, #64] 303 stp d9, d10, [sp, #80] 304 stp d11, d12, [sp, #96] 305 stp d13, d14, [sp, #112] 306 stp d15, d16, [sp, #128] 307 stp d17, d18, [sp, #144] 308 stp d19, d20, [sp, #160] 309 stp d21, d22, [sp, #176] 310 stp d23, d24, [sp, #192] 311 stp d25, d26, [sp, #208] 312 stp d27, d28, [sp, #224] 313 stp d29, d30, [sp, #240] 314 str d31, [sp, #256] 315 316 // Save core registers. 317 SAVE_REG x0, 264 318 SAVE_TWO_REGS x1, x2, 272 319 SAVE_TWO_REGS x3, x4, 288 320 SAVE_TWO_REGS x5, x6, 304 321 SAVE_TWO_REGS x7, x8, 320 322 SAVE_TWO_REGS x9, x10, 336 323 SAVE_TWO_REGS x11, x12, 352 324 SAVE_TWO_REGS x13, x14, 368 325 SAVE_TWO_REGS x15, x16, 384 326 SAVE_TWO_REGS x17, x18, 400 327 SAVE_TWO_REGS x19, x20, 416 328 SAVE_TWO_REGS x21, x22, 432 329 SAVE_TWO_REGS x23, x24, 448 330 SAVE_TWO_REGS x25, x26, 464 331 SAVE_TWO_REGS x27, x28, 480 332 333 // art::Runtime** xIP0 = &art::Runtime::instance_ 334 adrp xIP0, :got:_ZN3art7Runtime9instance_E 335 ldr xIP0, [xIP0, #:got_lo12:_ZN3art7Runtime9instance_E] 336 337 ldr xIP0, [xIP0] // art::Runtime* xIP0 = art::Runtime::instance_; 338 339 // ArtMethod* xIP0 = Runtime::instance_->callee_save_methods_[kSaveEverything]; 340 ldr xIP0, [xIP0, \runtime_method_offset] 341 342 // Store ArtMethod* Runtime::callee_save_methods_[kSaveEverything]. 343 str xIP0, [sp] 344 // Place sp in Thread::Current()->top_quick_frame. 345 mov xIP0, sp 346 str xIP0, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 347.endm 348 349 /* 350 * Macro that sets up the callee save frame to conform with 351 * Runtime::CreateCalleeSaveMethod(kSaveEverything) 352 */ 353.macro SETUP_SAVE_EVERYTHING_FRAME runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET 354 INCREASE_FRAME 512 355 SAVE_TWO_REGS x29, xLR, 496 356 SETUP_SAVE_EVERYTHING_FRAME_DECREMENTED_SP_SKIP_X29_LR \runtime_method_offset 357.endm 358 359.macro RESTORE_SAVE_EVERYTHING_FRAME_KEEP_X0 360 // Restore FP registers. 361 // For better performance, load d0 and d31 separately, so that all LDPs are 16-byte aligned. 362 ldr d0, [sp, #8] 363 ldp d1, d2, [sp, #16] 364 ldp d3, d4, [sp, #32] 365 ldp d5, d6, [sp, #48] 366 ldp d7, d8, [sp, #64] 367 ldp d9, d10, [sp, #80] 368 ldp d11, d12, [sp, #96] 369 ldp d13, d14, [sp, #112] 370 ldp d15, d16, [sp, #128] 371 ldp d17, d18, [sp, #144] 372 ldp d19, d20, [sp, #160] 373 ldp d21, d22, [sp, #176] 374 ldp d23, d24, [sp, #192] 375 ldp d25, d26, [sp, #208] 376 ldp d27, d28, [sp, #224] 377 ldp d29, d30, [sp, #240] 378 ldr d31, [sp, #256] 379 380 // Restore core registers, except x0. 381 RESTORE_TWO_REGS x1, x2, 272 382 RESTORE_TWO_REGS x3, x4, 288 383 RESTORE_TWO_REGS x5, x6, 304 384 RESTORE_TWO_REGS x7, x8, 320 385 RESTORE_TWO_REGS x9, x10, 336 386 RESTORE_TWO_REGS x11, x12, 352 387 RESTORE_TWO_REGS x13, x14, 368 388 RESTORE_TWO_REGS x15, x16, 384 389 RESTORE_TWO_REGS x17, x18, 400 390 RESTORE_TWO_REGS x19, x20, 416 391 RESTORE_TWO_REGS x21, x22, 432 392 RESTORE_TWO_REGS x23, x24, 448 393 RESTORE_TWO_REGS x25, x26, 464 394 RESTORE_TWO_REGS x27, x28, 480 395 RESTORE_TWO_REGS x29, xLR, 496 396 397 DECREASE_FRAME 512 398.endm 399 400.macro RESTORE_SAVE_EVERYTHING_FRAME 401 RESTORE_REG x0, 264 402 RESTORE_SAVE_EVERYTHING_FRAME_KEEP_X0 403.endm 404 405// Macro to refresh the Marking Register (W20). 406// 407// This macro must be called at the end of functions implementing 408// entrypoints that possibly (directly or indirectly) perform a 409// suspend check (before they return). 410.macro REFRESH_MARKING_REGISTER 411#if defined(USE_READ_BARRIER) && defined(USE_BAKER_READ_BARRIER) 412 ldr wMR, [xSELF, #THREAD_IS_GC_MARKING_OFFSET] 413#endif 414.endm 415 416.macro RETURN_IF_RESULT_IS_ZERO 417 cbnz x0, 1f // result non-zero branch over 418 ret // return 4191: 420.endm 421 422.macro RETURN_IF_RESULT_IS_NON_ZERO 423 cbz x0, 1f // result zero branch over 424 ret // return 4251: 426.endm 427 428 /* 429 * Macro that calls through to artDeliverPendingExceptionFromCode, where the pending 430 * exception is Thread::Current()->exception_ when the runtime method frame is ready. 431 */ 432.macro DELIVER_PENDING_EXCEPTION_FRAME_READY 433 mov x0, xSELF 434 435 // Point of no return. 436 bl artDeliverPendingExceptionFromCode // artDeliverPendingExceptionFromCode(Thread*) 437 brk 0 // Unreached 438.endm 439 440 /* 441 * Macro that calls through to artDeliverPendingExceptionFromCode, where the pending 442 * exception is Thread::Current()->exception_. 443 */ 444.macro DELIVER_PENDING_EXCEPTION 445 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME 446 DELIVER_PENDING_EXCEPTION_FRAME_READY 447.endm 448 449.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_REG reg 450 ldr \reg, [xSELF, # THREAD_EXCEPTION_OFFSET] // Get exception field. 451 cbnz \reg, 1f 452 ret 4531: 454 DELIVER_PENDING_EXCEPTION 455.endm 456 457.macro RETURN_OR_DELIVER_PENDING_EXCEPTION 458 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG xIP0 459.endm 460 461// Same as above with x1. This is helpful in stubs that want to avoid clobbering another register. 462.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 463 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG x1 464.endm 465 466.macro RETURN_IF_W0_IS_ZERO_OR_DELIVER 467 cbnz w0, 1f // result non-zero branch over 468 ret // return 4691: 470 DELIVER_PENDING_EXCEPTION 471.endm 472 473.macro NO_ARG_RUNTIME_EXCEPTION c_name, cxx_name 474 .extern \cxx_name 475ENTRY \c_name 476 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME // save all registers as basis for long jump context 477 mov x0, xSELF // pass Thread::Current 478 bl \cxx_name // \cxx_name(Thread*) 479 brk 0 480END \c_name 481.endm 482 483.macro NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING c_name, cxx_name 484 .extern \cxx_name 485ENTRY \c_name 486 SETUP_SAVE_EVERYTHING_FRAME // save all registers as basis for long jump context 487 mov x0, xSELF // pass Thread::Current 488 bl \cxx_name // \cxx_name(Thread*) 489 brk 0 490END \c_name 491.endm 492 493.macro ONE_ARG_RUNTIME_EXCEPTION c_name, cxx_name 494 .extern \cxx_name 495ENTRY \c_name 496 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME // save all registers as basis for long jump context. 497 mov x1, xSELF // pass Thread::Current. 498 bl \cxx_name // \cxx_name(arg, Thread*). 499 brk 0 500END \c_name 501.endm 502 503.macro TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING c_name, cxx_name 504 .extern \cxx_name 505ENTRY \c_name 506 SETUP_SAVE_EVERYTHING_FRAME // save all registers as basis for long jump context 507 mov x2, xSELF // pass Thread::Current 508 bl \cxx_name // \cxx_name(arg1, arg2, Thread*) 509 brk 0 510END \c_name 511.endm 512 513 /* 514 * Called by managed code, saves callee saves and then calls artThrowException 515 * that will place a mock Method* at the bottom of the stack. Arg1 holds the exception. 516 */ 517ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode 518 519 /* 520 * Called by managed code to create and deliver a NullPointerException. 521 */ 522NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode 523 524 /* 525 * Call installed by a signal handler to create and deliver a NullPointerException. 526 */ 527 .extern art_quick_throw_null_pointer_exception_from_signal 528ENTRY art_quick_throw_null_pointer_exception_from_signal 529 // The fault handler pushes the gc map address, i.e. "return address", to stack 530 // and passes the fault address in LR. So we need to set up the CFI info accordingly. 531 .cfi_def_cfa_offset __SIZEOF_POINTER__ 532 .cfi_rel_offset lr, 0 533 // Save all registers as basis for long jump context. 534 INCREASE_FRAME (FRAME_SIZE_SAVE_EVERYTHING - __SIZEOF_POINTER__) 535 SAVE_REG x29, (FRAME_SIZE_SAVE_EVERYTHING - 2 * __SIZEOF_POINTER__) // LR already saved. 536 SETUP_SAVE_EVERYTHING_FRAME_DECREMENTED_SP_SKIP_X29_LR 537 mov x0, lr // pass the fault address stored in LR by the fault handler. 538 mov x1, xSELF // pass Thread::Current. 539 bl artThrowNullPointerExceptionFromSignal // (arg, Thread*). 540 brk 0 541END art_quick_throw_null_pointer_exception_from_signal 542 543 /* 544 * Called by managed code to create and deliver an ArithmeticException. 545 */ 546NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_div_zero, artThrowDivZeroFromCode 547 548 /* 549 * Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds 550 * index, arg2 holds limit. 551 */ 552TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_array_bounds, artThrowArrayBoundsFromCode 553 554 /* 555 * Called by managed code to create and deliver a StringIndexOutOfBoundsException 556 * as if thrown from a call to String.charAt(). Arg1 holds index, arg2 holds limit. 557 */ 558TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_string_bounds, artThrowStringBoundsFromCode 559 560 /* 561 * Called by managed code to create and deliver a StackOverflowError. 562 */ 563NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode 564 565 /* 566 * All generated callsites for interface invokes and invocation slow paths will load arguments 567 * as usual - except instead of loading arg0/x0 with the target Method*, arg0/x0 will contain 568 * the method_idx. This wrapper will save arg1-arg3, and call the appropriate C helper. 569 * NOTE: "this" is first visible argument of the target, and so can be found in arg1/x1. 570 * 571 * The helper will attempt to locate the target and return a 128-bit result in x0/x1 consisting 572 * of the target Method* in x0 and method->code_ in x1. 573 * 574 * If unsuccessful, the helper will return null/????. There will be a pending exception in the 575 * thread and we branch to another stub to deliver it. 576 * 577 * On success this wrapper will restore arguments and *jump* to the target, leaving the lr 578 * pointing back to the original caller. 579 * 580 * Adapted from ARM32 code. 581 * 582 * Clobbers xIP0. 583 */ 584.macro INVOKE_TRAMPOLINE_BODY cxx_name 585 .extern \cxx_name 586 SETUP_SAVE_REFS_AND_ARGS_FRAME // save callee saves in case allocation triggers GC 587 // Helper signature is always 588 // (method_idx, *this_object, *caller_method, *self, sp) 589 590 mov x2, xSELF // pass Thread::Current 591 mov x3, sp 592 bl \cxx_name // (method_idx, this, Thread*, SP) 593 mov xIP0, x1 // save Method*->code_ 594 RESTORE_SAVE_REFS_AND_ARGS_FRAME 595 REFRESH_MARKING_REGISTER 596 cbz x0, 1f // did we find the target? if not go to exception delivery 597 br xIP0 // tail call to target 5981: 599 DELIVER_PENDING_EXCEPTION 600.endm 601.macro INVOKE_TRAMPOLINE c_name, cxx_name 602ENTRY \c_name 603 INVOKE_TRAMPOLINE_BODY \cxx_name 604END \c_name 605.endm 606 607INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck 608 609INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck 610INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck 611INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck 612INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck 613 614 615.macro INVOKE_STUB_CREATE_FRAME 616 617SAVE_SIZE=15*8 // x4, x5, x19, x20, x21, x22, x23, x24, x25, x26, x27, x28, SP, LR, FP saved. 618SAVE_SIZE_AND_METHOD=SAVE_SIZE+8 619 620 621 mov x9, sp // Save stack pointer. 622 .cfi_register sp,x9 623 624 add x10, x2, # SAVE_SIZE_AND_METHOD // calculate size of frame. 625 sub x10, sp, x10 // Calculate SP position - saves + ArtMethod* + args 626 and x10, x10, # ~0xf // Enforce 16 byte stack alignment. 627 mov sp, x10 // Set new SP. 628 629 sub x10, x9, #SAVE_SIZE // Calculate new FP (later). Done here as we must move SP 630 .cfi_def_cfa_register x10 // before this. 631 .cfi_adjust_cfa_offset SAVE_SIZE 632 633 str x28, [x10, #112] 634 .cfi_rel_offset x28, 112 635 636 stp x26, x27, [x10, #96] 637 .cfi_rel_offset x26, 96 638 .cfi_rel_offset x27, 104 639 640 stp x24, x25, [x10, #80] 641 .cfi_rel_offset x24, 80 642 .cfi_rel_offset x25, 88 643 644 stp x22, x23, [x10, #64] 645 .cfi_rel_offset x22, 64 646 .cfi_rel_offset x23, 72 647 648 stp x20, x21, [x10, #48] 649 .cfi_rel_offset x20, 48 650 .cfi_rel_offset x21, 56 651 652 stp x9, x19, [x10, #32] // Save old stack pointer and x19. 653 .cfi_rel_offset sp, 32 654 .cfi_rel_offset x19, 40 655 656 stp x4, x5, [x10, #16] // Save result and shorty addresses. 657 .cfi_rel_offset x4, 16 658 .cfi_rel_offset x5, 24 659 660 stp xFP, xLR, [x10] // Store LR & FP. 661 .cfi_rel_offset x29, 0 662 .cfi_rel_offset x30, 8 663 664 mov xFP, x10 // Use xFP now, as it's callee-saved. 665 .cfi_def_cfa_register x29 666 mov xSELF, x3 // Move thread pointer into SELF register. 667 668 // Copy arguments into stack frame. 669 // Use simple copy routine for now. 670 // 4 bytes per slot. 671 // X1 - source address 672 // W2 - args length 673 // X9 - destination address. 674 // W10 - temporary 675 add x9, sp, #8 // Destination address is bottom of stack + null. 676 677 // Copy parameters into the stack. Use numeric label as this is a macro and Clang's assembler 678 // does not have unique-id variables. 6791: 680 cmp w2, #0 681 beq 2f 682 sub w2, w2, #4 // Need 65536 bytes of range. 683 ldr w10, [x1, x2] 684 str w10, [x9, x2] 685 686 b 1b 687 6882: 689 // Store null into ArtMethod* at bottom of frame. 690 str xzr, [sp] 691.endm 692 693.macro INVOKE_STUB_CALL_AND_RETURN 694 695 REFRESH_MARKING_REGISTER 696 697 // load method-> METHOD_QUICK_CODE_OFFSET 698 ldr x9, [x0, #ART_METHOD_QUICK_CODE_OFFSET_64] 699 // Branch to method. 700 blr x9 701 702 // Restore return value address and shorty address. 703 ldp x4, x5, [xFP, #16] 704 .cfi_restore x4 705 .cfi_restore x5 706 707 ldr x28, [xFP, #112] 708 .cfi_restore x28 709 710 ldp x26, x27, [xFP, #96] 711 .cfi_restore x26 712 .cfi_restore x27 713 714 ldp x24, x25, [xFP, #80] 715 .cfi_restore x24 716 .cfi_restore x25 717 718 ldp x22, x23, [xFP, #64] 719 .cfi_restore x22 720 .cfi_restore x23 721 722 ldp x20, x21, [xFP, #48] 723 .cfi_restore x20 724 .cfi_restore x21 725 726 // Store result (w0/x0/s0/d0) appropriately, depending on resultType. 727 ldrb w10, [x5] 728 729 // Check the return type and store the correct register into the jvalue in memory. 730 // Use numeric label as this is a macro and Clang's assembler does not have unique-id variables. 731 732 // Don't set anything for a void type. 733 cmp w10, #'V' 734 beq 3f 735 736 // Is it a double? 737 cmp w10, #'D' 738 bne 1f 739 str d0, [x4] 740 b 3f 741 7421: // Is it a float? 743 cmp w10, #'F' 744 bne 2f 745 str s0, [x4] 746 b 3f 747 7482: // Just store x0. Doesn't matter if it is 64 or 32 bits. 749 str x0, [x4] 750 7513: // Finish up. 752 ldp x2, x19, [xFP, #32] // Restore stack pointer and x19. 753 .cfi_restore x19 754 mov sp, x2 755 .cfi_restore sp 756 757 ldp xFP, xLR, [xFP] // Restore old frame pointer and link register. 758 .cfi_restore x29 759 .cfi_restore x30 760 761 ret 762 763.endm 764 765 766/* 767 * extern"C" void art_quick_invoke_stub(ArtMethod *method, x0 768 * uint32_t *args, x1 769 * uint32_t argsize, w2 770 * Thread *self, x3 771 * JValue *result, x4 772 * char *shorty); x5 773 * +----------------------+ 774 * | | 775 * | C/C++ frame | 776 * | LR'' | 777 * | FP'' | <- SP' 778 * +----------------------+ 779 * +----------------------+ 780 * | x28 | <- TODO: Remove callee-saves. 781 * | : | 782 * | x19 | 783 * | SP' | 784 * | X5 | 785 * | X4 | Saved registers 786 * | LR' | 787 * | FP' | <- FP 788 * +----------------------+ 789 * | uint32_t out[n-1] | 790 * | : : | Outs 791 * | uint32_t out[0] | 792 * | ArtMethod* | <- SP value=null 793 * +----------------------+ 794 * 795 * Outgoing registers: 796 * x0 - Method* 797 * x1-x7 - integer parameters. 798 * d0-d7 - Floating point parameters. 799 * xSELF = self 800 * SP = & of ArtMethod* 801 * x1 = "this" pointer. 802 * 803 */ 804ENTRY art_quick_invoke_stub 805 // Spill registers as per AACPS64 calling convention. 806 INVOKE_STUB_CREATE_FRAME 807 808 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 809 // Parse the passed shorty to determine which register to load. 810 // Load addresses for routines that load WXSD registers. 811 adr x11, .LstoreW2 812 adr x12, .LstoreX2 813 adr x13, .LstoreS0 814 adr x14, .LstoreD0 815 816 // Initialize routine offsets to 0 for integers and floats. 817 // x8 for integers, x15 for floating point. 818 mov x8, #0 819 mov x15, #0 820 821 add x10, x5, #1 // Load shorty address, plus one to skip return value. 822 ldr w1, [x9],#4 // Load "this" parameter, and increment arg pointer. 823 824 // Loop to fill registers. 825.LfillRegisters: 826 ldrb w17, [x10], #1 // Load next character in signature, and increment. 827 cbz w17, .LcallFunction // Exit at end of signature. Shorty 0 terminated. 828 829 cmp w17, #'F' // is this a float? 830 bne .LisDouble 831 832 cmp x15, # 8*12 // Skip this load if all registers full. 833 beq .Ladvance4 834 835 add x17, x13, x15 // Calculate subroutine to jump to. 836 br x17 837 838.LisDouble: 839 cmp w17, #'D' // is this a double? 840 bne .LisLong 841 842 cmp x15, # 8*12 // Skip this load if all registers full. 843 beq .Ladvance8 844 845 add x17, x14, x15 // Calculate subroutine to jump to. 846 br x17 847 848.LisLong: 849 cmp w17, #'J' // is this a long? 850 bne .LisOther 851 852 cmp x8, # 6*12 // Skip this load if all registers full. 853 beq .Ladvance8 854 855 add x17, x12, x8 // Calculate subroutine to jump to. 856 br x17 857 858.LisOther: // Everything else takes one vReg. 859 cmp x8, # 6*12 // Skip this load if all registers full. 860 beq .Ladvance4 861 862 add x17, x11, x8 // Calculate subroutine to jump to. 863 br x17 864 865.Ladvance4: 866 add x9, x9, #4 867 b .LfillRegisters 868 869.Ladvance8: 870 add x9, x9, #8 871 b .LfillRegisters 872 873// Macro for loading a parameter into a register. 874// counter - the register with offset into these tables 875// size - the size of the register - 4 or 8 bytes. 876// register - the name of the register to be loaded. 877.macro LOADREG counter size register return 878 ldr \register , [x9], #\size 879 add \counter, \counter, 12 880 b \return 881.endm 882 883// Store ints. 884.LstoreW2: 885 LOADREG x8 4 w2 .LfillRegisters 886 LOADREG x8 4 w3 .LfillRegisters 887 LOADREG x8 4 w4 .LfillRegisters 888 LOADREG x8 4 w5 .LfillRegisters 889 LOADREG x8 4 w6 .LfillRegisters 890 LOADREG x8 4 w7 .LfillRegisters 891 892// Store longs. 893.LstoreX2: 894 LOADREG x8 8 x2 .LfillRegisters 895 LOADREG x8 8 x3 .LfillRegisters 896 LOADREG x8 8 x4 .LfillRegisters 897 LOADREG x8 8 x5 .LfillRegisters 898 LOADREG x8 8 x6 .LfillRegisters 899 LOADREG x8 8 x7 .LfillRegisters 900 901// Store singles. 902.LstoreS0: 903 LOADREG x15 4 s0 .LfillRegisters 904 LOADREG x15 4 s1 .LfillRegisters 905 LOADREG x15 4 s2 .LfillRegisters 906 LOADREG x15 4 s3 .LfillRegisters 907 LOADREG x15 4 s4 .LfillRegisters 908 LOADREG x15 4 s5 .LfillRegisters 909 LOADREG x15 4 s6 .LfillRegisters 910 LOADREG x15 4 s7 .LfillRegisters 911 912// Store doubles. 913.LstoreD0: 914 LOADREG x15 8 d0 .LfillRegisters 915 LOADREG x15 8 d1 .LfillRegisters 916 LOADREG x15 8 d2 .LfillRegisters 917 LOADREG x15 8 d3 .LfillRegisters 918 LOADREG x15 8 d4 .LfillRegisters 919 LOADREG x15 8 d5 .LfillRegisters 920 LOADREG x15 8 d6 .LfillRegisters 921 LOADREG x15 8 d7 .LfillRegisters 922 923 924.LcallFunction: 925 926 INVOKE_STUB_CALL_AND_RETURN 927 928END art_quick_invoke_stub 929 930/* extern"C" 931 * void art_quick_invoke_static_stub(ArtMethod *method, x0 932 * uint32_t *args, x1 933 * uint32_t argsize, w2 934 * Thread *self, x3 935 * JValue *result, x4 936 * char *shorty); x5 937 */ 938ENTRY art_quick_invoke_static_stub 939 // Spill registers as per AACPS64 calling convention. 940 INVOKE_STUB_CREATE_FRAME 941 942 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 943 // Parse the passed shorty to determine which register to load. 944 // Load addresses for routines that load WXSD registers. 945 adr x11, .LstoreW1_2 946 adr x12, .LstoreX1_2 947 adr x13, .LstoreS0_2 948 adr x14, .LstoreD0_2 949 950 // Initialize routine offsets to 0 for integers and floats. 951 // x8 for integers, x15 for floating point. 952 mov x8, #0 953 mov x15, #0 954 955 add x10, x5, #1 // Load shorty address, plus one to skip return value. 956 957 // Loop to fill registers. 958.LfillRegisters2: 959 ldrb w17, [x10], #1 // Load next character in signature, and increment. 960 cbz w17, .LcallFunction2 // Exit at end of signature. Shorty 0 terminated. 961 962 cmp w17, #'F' // is this a float? 963 bne .LisDouble2 964 965 cmp x15, # 8*12 // Skip this load if all registers full. 966 beq .Ladvance4_2 967 968 add x17, x13, x15 // Calculate subroutine to jump to. 969 br x17 970 971.LisDouble2: 972 cmp w17, #'D' // is this a double? 973 bne .LisLong2 974 975 cmp x15, # 8*12 // Skip this load if all registers full. 976 beq .Ladvance8_2 977 978 add x17, x14, x15 // Calculate subroutine to jump to. 979 br x17 980 981.LisLong2: 982 cmp w17, #'J' // is this a long? 983 bne .LisOther2 984 985 cmp x8, # 7*12 // Skip this load if all registers full. 986 beq .Ladvance8_2 987 988 add x17, x12, x8 // Calculate subroutine to jump to. 989 br x17 990 991.LisOther2: // Everything else takes one vReg. 992 cmp x8, # 7*12 // Skip this load if all registers full. 993 beq .Ladvance4_2 994 995 add x17, x11, x8 // Calculate subroutine to jump to. 996 br x17 997 998.Ladvance4_2: 999 add x9, x9, #4 1000 b .LfillRegisters2 1001 1002.Ladvance8_2: 1003 add x9, x9, #8 1004 b .LfillRegisters2 1005 1006// Store ints. 1007.LstoreW1_2: 1008 LOADREG x8 4 w1 .LfillRegisters2 1009 LOADREG x8 4 w2 .LfillRegisters2 1010 LOADREG x8 4 w3 .LfillRegisters2 1011 LOADREG x8 4 w4 .LfillRegisters2 1012 LOADREG x8 4 w5 .LfillRegisters2 1013 LOADREG x8 4 w6 .LfillRegisters2 1014 LOADREG x8 4 w7 .LfillRegisters2 1015 1016// Store longs. 1017.LstoreX1_2: 1018 LOADREG x8 8 x1 .LfillRegisters2 1019 LOADREG x8 8 x2 .LfillRegisters2 1020 LOADREG x8 8 x3 .LfillRegisters2 1021 LOADREG x8 8 x4 .LfillRegisters2 1022 LOADREG x8 8 x5 .LfillRegisters2 1023 LOADREG x8 8 x6 .LfillRegisters2 1024 LOADREG x8 8 x7 .LfillRegisters2 1025 1026// Store singles. 1027.LstoreS0_2: 1028 LOADREG x15 4 s0 .LfillRegisters2 1029 LOADREG x15 4 s1 .LfillRegisters2 1030 LOADREG x15 4 s2 .LfillRegisters2 1031 LOADREG x15 4 s3 .LfillRegisters2 1032 LOADREG x15 4 s4 .LfillRegisters2 1033 LOADREG x15 4 s5 .LfillRegisters2 1034 LOADREG x15 4 s6 .LfillRegisters2 1035 LOADREG x15 4 s7 .LfillRegisters2 1036 1037// Store doubles. 1038.LstoreD0_2: 1039 LOADREG x15 8 d0 .LfillRegisters2 1040 LOADREG x15 8 d1 .LfillRegisters2 1041 LOADREG x15 8 d2 .LfillRegisters2 1042 LOADREG x15 8 d3 .LfillRegisters2 1043 LOADREG x15 8 d4 .LfillRegisters2 1044 LOADREG x15 8 d5 .LfillRegisters2 1045 LOADREG x15 8 d6 .LfillRegisters2 1046 LOADREG x15 8 d7 .LfillRegisters2 1047 1048 1049.LcallFunction2: 1050 1051 INVOKE_STUB_CALL_AND_RETURN 1052 1053END art_quick_invoke_static_stub 1054 1055 1056 1057/* extern"C" void art_quick_osr_stub(void** stack, x0 1058 * size_t stack_size_in_bytes, x1 1059 * const uin8_t* native_pc, x2 1060 * JValue *result, x3 1061 * char *shorty, x4 1062 * Thread *self) x5 1063 */ 1064ENTRY art_quick_osr_stub 1065SAVE_SIZE=15*8 // x3, x4, x19, x20, x21, x22, x23, x24, x25, x26, x27, x28, SP, LR, FP saved. 1066 mov x9, sp // Save stack pointer. 1067 .cfi_register sp,x9 1068 1069 sub x10, sp, # SAVE_SIZE 1070 and x10, x10, # ~0xf // Enforce 16 byte stack alignment. 1071 mov sp, x10 // Set new SP. 1072 1073 str x28, [sp, #112] 1074 stp x26, x27, [sp, #96] 1075 stp x24, x25, [sp, #80] 1076 stp x22, x23, [sp, #64] 1077 stp x20, x21, [sp, #48] 1078 stp x9, x19, [sp, #32] // Save old stack pointer and x19. 1079 stp x3, x4, [sp, #16] // Save result and shorty addresses. 1080 stp xFP, xLR, [sp] // Store LR & FP. 1081 mov xSELF, x5 // Move thread pointer into SELF register. 1082 REFRESH_MARKING_REGISTER 1083 1084 sub sp, sp, #16 1085 str xzr, [sp] // Store null for ArtMethod* slot 1086 // Branch to stub. 1087 bl .Losr_entry 1088 add sp, sp, #16 1089 1090 // Restore return value address and shorty address. 1091 ldp x3,x4, [sp, #16] 1092 ldr x28, [sp, #112] 1093 ldp x26, x27, [sp, #96] 1094 ldp x24, x25, [sp, #80] 1095 ldp x22, x23, [sp, #64] 1096 ldp x20, x21, [sp, #48] 1097 1098 // Store result (w0/x0/s0/d0) appropriately, depending on resultType. 1099 ldrb w10, [x4] 1100 1101 // Check the return type and store the correct register into the jvalue in memory. 1102 1103 // Don't set anything for a void type. 1104 cmp w10, #'V' 1105 beq .Losr_exit 1106 1107 // Is it a double? 1108 cmp w10, #'D' 1109 bne .Lno_double 1110 str d0, [x3] 1111 b .Losr_exit 1112 1113.Lno_double: // Is it a float? 1114 cmp w10, #'F' 1115 bne .Lno_float 1116 str s0, [x3] 1117 b .Losr_exit 1118 1119.Lno_float: // Just store x0. Doesn't matter if it is 64 or 32 bits. 1120 str x0, [x3] 1121 1122.Losr_exit: // Finish up. 1123 ldp x2, x19, [sp, #32] // Restore stack pointer and x19. 1124 ldp xFP, xLR, [sp] // Restore old frame pointer and link register. 1125 mov sp, x2 1126 ret 1127 1128.Losr_entry: 1129 // Update stack pointer for the callee 1130 sub sp, sp, x1 1131 1132 // Update link register slot expected by the callee. 1133 sub w1, w1, #8 1134 str lr, [sp, x1] 1135 1136 // Copy arguments into stack frame. 1137 // Use simple copy routine for now. 1138 // 4 bytes per slot. 1139 // X0 - source address 1140 // W1 - args length 1141 // SP - destination address. 1142 // W10 - temporary 1143.Losr_loop_entry: 1144 cmp w1, #0 1145 beq .Losr_loop_exit 1146 sub w1, w1, #4 1147 ldr w10, [x0, x1] 1148 str w10, [sp, x1] 1149 b .Losr_loop_entry 1150 1151.Losr_loop_exit: 1152 // Branch to the OSR entry point. 1153 br x2 1154 1155END art_quick_osr_stub 1156 1157 /* 1158 * On entry x0 is uintptr_t* gprs_ and x1 is uint64_t* fprs_ 1159 */ 1160 1161ENTRY art_quick_do_long_jump 1162 // Load FPRs 1163 ldp d0, d1, [x1], #16 1164 ldp d2, d3, [x1], #16 1165 ldp d4, d5, [x1], #16 1166 ldp d6, d7, [x1], #16 1167 ldp d8, d9, [x1], #16 1168 ldp d10, d11, [x1], #16 1169 ldp d12, d13, [x1], #16 1170 ldp d14, d15, [x1], #16 1171 ldp d16, d17, [x1], #16 1172 ldp d18, d19, [x1], #16 1173 ldp d20, d21, [x1], #16 1174 ldp d22, d23, [x1], #16 1175 ldp d24, d25, [x1], #16 1176 ldp d26, d27, [x1], #16 1177 ldp d28, d29, [x1], #16 1178 ldp d30, d31, [x1] 1179 1180 // Load GPRs 1181 // TODO: lots of those are smashed, could optimize. 1182 add x0, x0, #30*8 1183 ldp x30, x1, [x0], #-16 // LR & SP 1184 ldp x28, x29, [x0], #-16 1185 ldp x26, x27, [x0], #-16 1186 ldp x24, x25, [x0], #-16 1187 ldp x22, x23, [x0], #-16 1188 ldp x20, x21, [x0], #-16 1189 ldp x18, x19, [x0], #-16 // X18 & xSELF 1190 ldp x16, x17, [x0], #-16 1191 ldp x14, x15, [x0], #-16 1192 ldp x12, x13, [x0], #-16 1193 ldp x10, x11, [x0], #-16 1194 ldp x8, x9, [x0], #-16 1195 ldp x6, x7, [x0], #-16 1196 ldp x4, x5, [x0], #-16 1197 ldp x2, x3, [x0], #-16 1198 mov sp, x1 1199 1200 REFRESH_MARKING_REGISTER 1201 1202 // Need to load PC, it's at the end (after the space for the unused XZR). Use x1. 1203 ldr x1, [x0, #33*8] 1204 // And the value of x0. 1205 ldr x0, [x0] 1206 1207 br x1 1208END art_quick_do_long_jump 1209 1210 /* 1211 * Entry from managed code that calls artLockObjectFromCode, may block for GC. x0 holds the 1212 * possibly null object to lock. 1213 * 1214 * Derived from arm32 code. 1215 */ 1216 .extern artLockObjectFromCode 1217ENTRY art_quick_lock_object 1218 cbz w0, .Lslow_lock 1219 add x4, x0, #MIRROR_OBJECT_LOCK_WORD_OFFSET // exclusive load/store has no immediate anymore 1220.Lretry_lock: 1221 ldr w2, [xSELF, #THREAD_ID_OFFSET] // TODO: Can the thread ID really change during the loop? 1222 ldaxr w1, [x4] // acquire needed only in most common case 1223 and w3, w1, #LOCK_WORD_GC_STATE_MASK_SHIFTED_TOGGLED // zero the gc bits 1224 cbnz w3, .Lnot_unlocked // already thin locked 1225 // unlocked case - x1: original lock word that's zero except for the read barrier bits. 1226 orr x2, x1, x2 // x2 holds thread id with count of 0 with preserved read barrier bits 1227 stxr w3, w2, [x4] 1228 cbnz w3, .Llock_stxr_fail // store failed, retry 1229 ret 1230.Lnot_unlocked: // x1: original lock word 1231 lsr w3, w1, LOCK_WORD_STATE_SHIFT 1232 cbnz w3, .Lslow_lock // if either of the top two bits are set, go slow path 1233 eor w2, w1, w2 // lock_word.ThreadId() ^ self->ThreadId() 1234 uxth w2, w2 // zero top 16 bits 1235 cbnz w2, .Lslow_lock // lock word and self thread id's match -> recursive lock 1236 // else contention, go to slow path 1237 and w3, w1, #LOCK_WORD_GC_STATE_MASK_SHIFTED_TOGGLED // zero the gc bits. 1238 add w2, w3, #LOCK_WORD_THIN_LOCK_COUNT_ONE // increment count in lock word placing in w2 to check overflow 1239 lsr w3, w2, #LOCK_WORD_GC_STATE_SHIFT // if the first gc state bit is set, we overflowed. 1240 cbnz w3, .Lslow_lock // if we overflow the count go slow path 1241 add w2, w1, #LOCK_WORD_THIN_LOCK_COUNT_ONE // increment count for real 1242 stxr w3, w2, [x4] 1243 cbnz w3, .Llock_stxr_fail // store failed, retry 1244 ret 1245.Llock_stxr_fail: 1246 b .Lretry_lock // retry 1247.Lslow_lock: 1248 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case we block 1249 mov x1, xSELF // pass Thread::Current 1250 bl artLockObjectFromCode // (Object* obj, Thread*) 1251 RESTORE_SAVE_REFS_ONLY_FRAME 1252 REFRESH_MARKING_REGISTER 1253 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1254END art_quick_lock_object 1255 1256ENTRY art_quick_lock_object_no_inline 1257 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case we block 1258 mov x1, xSELF // pass Thread::Current 1259 bl artLockObjectFromCode // (Object* obj, Thread*) 1260 RESTORE_SAVE_REFS_ONLY_FRAME 1261 REFRESH_MARKING_REGISTER 1262 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1263END art_quick_lock_object_no_inline 1264 1265 /* 1266 * Entry from managed code that calls artUnlockObjectFromCode and delivers exception on failure. 1267 * x0 holds the possibly null object to lock. 1268 * 1269 * Derived from arm32 code. 1270 */ 1271 .extern artUnlockObjectFromCode 1272ENTRY art_quick_unlock_object 1273 cbz x0, .Lslow_unlock 1274 add x4, x0, #MIRROR_OBJECT_LOCK_WORD_OFFSET // exclusive load/store has no immediate anymore 1275.Lretry_unlock: 1276#ifndef USE_READ_BARRIER 1277 ldr w1, [x4] 1278#else 1279 ldxr w1, [x4] // Need to use atomic instructions for read barrier 1280#endif 1281 lsr w2, w1, LOCK_WORD_STATE_SHIFT 1282 cbnz w2, .Lslow_unlock // if either of the top two bits are set, go slow path 1283 ldr w2, [xSELF, #THREAD_ID_OFFSET] 1284 and w3, w1, #LOCK_WORD_GC_STATE_MASK_SHIFTED_TOGGLED // zero the gc bits 1285 eor w3, w3, w2 // lock_word.ThreadId() ^ self->ThreadId() 1286 uxth w3, w3 // zero top 16 bits 1287 cbnz w3, .Lslow_unlock // do lock word and self thread id's match? 1288 and w3, w1, #LOCK_WORD_GC_STATE_MASK_SHIFTED_TOGGLED // zero the gc bits 1289 cmp w3, #LOCK_WORD_THIN_LOCK_COUNT_ONE 1290 bpl .Lrecursive_thin_unlock 1291 // transition to unlocked 1292 and w3, w1, #LOCK_WORD_GC_STATE_MASK_SHIFTED // w3: zero except for the preserved read barrier bits 1293#ifndef USE_READ_BARRIER 1294 stlr w3, [x4] 1295#else 1296 stlxr w2, w3, [x4] // Need to use atomic instructions for read barrier 1297 cbnz w2, .Lunlock_stxr_fail // store failed, retry 1298#endif 1299 ret 1300.Lrecursive_thin_unlock: // w1: original lock word 1301 sub w1, w1, #LOCK_WORD_THIN_LOCK_COUNT_ONE // decrement count 1302#ifndef USE_READ_BARRIER 1303 str w1, [x4] 1304#else 1305 stxr w2, w1, [x4] // Need to use atomic instructions for read barrier 1306 cbnz w2, .Lunlock_stxr_fail // store failed, retry 1307#endif 1308 ret 1309.Lunlock_stxr_fail: 1310 b .Lretry_unlock // retry 1311.Lslow_unlock: 1312 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case exception allocation triggers GC 1313 mov x1, xSELF // pass Thread::Current 1314 bl artUnlockObjectFromCode // (Object* obj, Thread*) 1315 RESTORE_SAVE_REFS_ONLY_FRAME 1316 REFRESH_MARKING_REGISTER 1317 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1318END art_quick_unlock_object 1319 1320ENTRY art_quick_unlock_object_no_inline 1321 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case exception allocation triggers GC 1322 mov x1, xSELF // pass Thread::Current 1323 bl artUnlockObjectFromCode // (Object* obj, Thread*) 1324 RESTORE_SAVE_REFS_ONLY_FRAME 1325 REFRESH_MARKING_REGISTER 1326 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1327END art_quick_unlock_object_no_inline 1328 1329 /* 1330 * Entry from managed code that calls artInstanceOfFromCode and on failure calls 1331 * artThrowClassCastExceptionForObject. 1332 */ 1333 .extern artInstanceOfFromCode 1334 .extern artThrowClassCastExceptionForObject 1335ENTRY art_quick_check_instance_of 1336 // Store arguments and link register 1337 // Stack needs to be 16B aligned on calls. 1338 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, 32 1339 SAVE_REG xLR, 24 1340 1341 // Call runtime code 1342 bl artInstanceOfFromCode 1343 1344 // Check for exception 1345 cbz x0, .Lthrow_class_cast_exception 1346 1347 // Restore and return 1348 .cfi_remember_state 1349 RESTORE_REG xLR, 24 1350 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, 32 1351 ret 1352 .cfi_restore_state // Reset unwind info so following code unwinds. 1353 .cfi_def_cfa_offset 32 // workaround for clang bug: 31975598 1354 1355.Lthrow_class_cast_exception: 1356 // Restore 1357 RESTORE_REG xLR, 24 1358 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, 32 1359 1360 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME // save all registers as basis for long jump context 1361 mov x2, xSELF // pass Thread::Current 1362 bl artThrowClassCastExceptionForObject // (Object*, Class*, Thread*) 1363 brk 0 // We should not return here... 1364END art_quick_check_instance_of 1365 1366// Restore xReg's value from [sp, #offset] if xReg is not the same as xExclude. 1367.macro POP_REG_NE xReg, offset, xExclude 1368 .ifnc \xReg, \xExclude 1369 ldr \xReg, [sp, #\offset] // restore xReg 1370 .cfi_restore \xReg 1371 .endif 1372.endm 1373 1374// Restore xReg1's value from [sp, #offset] if xReg1 is not the same as xExclude. 1375// Restore xReg2's value from [sp, #(offset + 8)] if xReg2 is not the same as xExclude. 1376.macro POP_REGS_NE xReg1, xReg2, offset, xExclude 1377 .ifc \xReg1, \xExclude 1378 ldr \xReg2, [sp, #(\offset + 8)] // restore xReg2 1379 .else 1380 .ifc \xReg2, \xExclude 1381 ldr \xReg1, [sp, #\offset] // restore xReg1 1382 .else 1383 ldp \xReg1, \xReg2, [sp, #\offset] // restore xReg1 and xReg2 1384 .endif 1385 .endif 1386 .cfi_restore \xReg1 1387 .cfi_restore \xReg2 1388.endm 1389 1390 /* 1391 * Macro to insert read barrier, only used in art_quick_aput_obj. 1392 * xDest, wDest and xObj are registers, offset is a defined literal such as 1393 * MIRROR_OBJECT_CLASS_OFFSET. Dest needs both x and w versions of the same register to handle 1394 * name mismatch between instructions. This macro uses the lower 32b of register when possible. 1395 * TODO: When read barrier has a fast path, add heap unpoisoning support for the fast path. 1396 */ 1397.macro READ_BARRIER xDest, wDest, xObj, xTemp, wTemp, offset, number 1398#ifdef USE_READ_BARRIER 1399# ifdef USE_BAKER_READ_BARRIER 1400 ldr \wTemp, [\xObj, #MIRROR_OBJECT_LOCK_WORD_OFFSET] 1401 tbnz \wTemp, #LOCK_WORD_READ_BARRIER_STATE_SHIFT, .Lrb_slowpath\number 1402 // False dependency to avoid needing load/load fence. 1403 add \xObj, \xObj, \xTemp, lsr #32 1404 ldr \wDest, [\xObj, #\offset] // Heap reference = 32b. This also zero-extends to \xDest. 1405 UNPOISON_HEAP_REF \wDest 1406 b .Lrb_exit\number 1407# endif // USE_BAKER_READ_BARRIER 1408.Lrb_slowpath\number: 1409 // Store registers used in art_quick_aput_obj (x0-x4, LR), stack is 16B aligned. 1410 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, 48 1411 SAVE_TWO_REGS x2, x3, 16 1412 SAVE_TWO_REGS x4, xLR, 32 1413 1414 // mov x0, \xRef // pass ref in x0 (no-op for now since parameter ref is unused) 1415 .ifnc \xObj, x1 1416 mov x1, \xObj // pass xObj 1417 .endif 1418 mov w2, #\offset // pass offset 1419 bl artReadBarrierSlow // artReadBarrierSlow(ref, xObj, offset) 1420 // No need to unpoison return value in w0, artReadBarrierSlow() would do the unpoisoning. 1421 .ifnc \wDest, w0 1422 mov \wDest, w0 // save return value in wDest 1423 .endif 1424 1425 // Conditionally restore saved registers 1426 POP_REG_NE x0, 0, \xDest 1427 POP_REG_NE x1, 8, \xDest 1428 POP_REG_NE x2, 16, \xDest 1429 POP_REG_NE x3, 24, \xDest 1430 POP_REG_NE x4, 32, \xDest 1431 RESTORE_REG xLR, 40 1432 DECREASE_FRAME 48 1433.Lrb_exit\number: 1434#else 1435 ldr \wDest, [\xObj, #\offset] // Heap reference = 32b. This also zero-extends to \xDest. 1436 UNPOISON_HEAP_REF \wDest 1437#endif // USE_READ_BARRIER 1438.endm 1439 1440#ifdef USE_READ_BARRIER 1441 .extern artReadBarrierSlow 1442#endif 1443ENTRY art_quick_aput_obj 1444 cbz x2, .Ldo_aput_null 1445 READ_BARRIER x3, w3, x0, x3, w3, MIRROR_OBJECT_CLASS_OFFSET, 0 // Heap reference = 32b 1446 // This also zero-extends to x3 1447 READ_BARRIER x3, w3, x3, x4, w4, MIRROR_CLASS_COMPONENT_TYPE_OFFSET, 1 // Heap reference = 32b 1448 // This also zero-extends to x3 1449 READ_BARRIER x4, w4, x2, x4, w4, MIRROR_OBJECT_CLASS_OFFSET, 2 // Heap reference = 32b 1450 // This also zero-extends to x4 1451 cmp w3, w4 // value's type == array's component type - trivial assignability 1452 bne .Lcheck_assignability 1453.Ldo_aput: 1454 add x3, x0, #MIRROR_OBJECT_ARRAY_DATA_OFFSET 1455 // "Compress" = do nothing 1456 POISON_HEAP_REF w2 1457 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1458 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1459 lsr x0, x0, #CARD_TABLE_CARD_SHIFT 1460 strb w3, [x3, x0] 1461 ret 1462.Ldo_aput_null: 1463 add x3, x0, #MIRROR_OBJECT_ARRAY_DATA_OFFSET 1464 // "Compress" = do nothing 1465 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1466 ret 1467.Lcheck_assignability: 1468 // Store arguments and link register 1469 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, 32 1470 SAVE_TWO_REGS x2, xLR, 16 1471 1472 // Call runtime code 1473 mov x0, x3 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1474 mov x1, x4 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1475 bl artIsAssignableFromCode 1476 1477 // Check for exception 1478 cbz x0, .Lthrow_array_store_exception 1479 1480 // Restore 1481 .cfi_remember_state 1482 RESTORE_TWO_REGS x2, xLR, 16 1483 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, 32 1484 1485 add x3, x0, #MIRROR_OBJECT_ARRAY_DATA_OFFSET 1486 // "Compress" = do nothing 1487 POISON_HEAP_REF w2 1488 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1489 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1490 lsr x0, x0, #CARD_TABLE_CARD_SHIFT 1491 strb w3, [x3, x0] 1492 ret 1493 .cfi_restore_state // Reset unwind info so following code unwinds. 1494 .cfi_def_cfa_offset 32 // workaround for clang bug: 31975598 1495.Lthrow_array_store_exception: 1496 RESTORE_TWO_REGS x2, xLR, 16 1497 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, 32 1498 1499 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME 1500 mov x1, x2 // Pass value. 1501 mov x2, xSELF // Pass Thread::Current. 1502 bl artThrowArrayStoreException // (Object*, Object*, Thread*). 1503 brk 0 // Unreached. 1504END art_quick_aput_obj 1505 1506// Macro to facilitate adding new allocation entrypoints. 1507.macro ONE_ARG_DOWNCALL name, entrypoint, return 1508 .extern \entrypoint 1509ENTRY \name 1510 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1511 mov x1, xSELF // pass Thread::Current 1512 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*) 1513 RESTORE_SAVE_REFS_ONLY_FRAME 1514 REFRESH_MARKING_REGISTER 1515 \return 1516END \name 1517.endm 1518 1519// Macro to facilitate adding new allocation entrypoints. 1520.macro TWO_ARG_DOWNCALL name, entrypoint, return 1521 .extern \entrypoint 1522ENTRY \name 1523 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1524 mov x2, xSELF // pass Thread::Current 1525 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*) 1526 RESTORE_SAVE_REFS_ONLY_FRAME 1527 REFRESH_MARKING_REGISTER 1528 \return 1529END \name 1530.endm 1531 1532// Macro to facilitate adding new allocation entrypoints. 1533.macro THREE_ARG_DOWNCALL name, entrypoint, return 1534 .extern \entrypoint 1535ENTRY \name 1536 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1537 mov x3, xSELF // pass Thread::Current 1538 bl \entrypoint 1539 RESTORE_SAVE_REFS_ONLY_FRAME 1540 REFRESH_MARKING_REGISTER 1541 \return 1542END \name 1543.endm 1544 1545// Macro to facilitate adding new allocation entrypoints. 1546.macro FOUR_ARG_DOWNCALL name, entrypoint, return 1547 .extern \entrypoint 1548ENTRY \name 1549 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1550 mov x4, xSELF // pass Thread::Current 1551 bl \entrypoint // 1552 RESTORE_SAVE_REFS_ONLY_FRAME 1553 REFRESH_MARKING_REGISTER 1554 \return 1555END \name 1556.endm 1557 1558// Macros taking opportunity of code similarities for downcalls. 1559.macro ONE_ARG_REF_DOWNCALL name, entrypoint, return 1560 .extern \entrypoint 1561ENTRY \name 1562 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1563 mov x1, xSELF // pass Thread::Current 1564 bl \entrypoint // (uint32_t type_idx, Thread*) 1565 RESTORE_SAVE_REFS_ONLY_FRAME 1566 REFRESH_MARKING_REGISTER 1567 \return 1568END \name 1569.endm 1570 1571.macro TWO_ARG_REF_DOWNCALL name, entrypoint, return 1572 .extern \entrypoint 1573ENTRY \name 1574 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1575 mov x2, xSELF // pass Thread::Current 1576 bl \entrypoint 1577 RESTORE_SAVE_REFS_ONLY_FRAME 1578 REFRESH_MARKING_REGISTER 1579 \return 1580END \name 1581.endm 1582 1583.macro THREE_ARG_REF_DOWNCALL name, entrypoint, return 1584 .extern \entrypoint 1585ENTRY \name 1586 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1587 mov x3, xSELF // pass Thread::Current 1588 bl \entrypoint 1589 RESTORE_SAVE_REFS_ONLY_FRAME 1590 REFRESH_MARKING_REGISTER 1591 \return 1592END \name 1593.endm 1594 1595// Macro for string and type resolution and initialization. 1596.macro ONE_ARG_SAVE_EVERYTHING_DOWNCALL name, entrypoint, runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET 1597 .extern \entrypoint 1598ENTRY \name 1599 SETUP_SAVE_EVERYTHING_FRAME \runtime_method_offset // save everything for stack crawl 1600 mov x1, xSELF // pass Thread::Current 1601 bl \entrypoint // (int32_t index, Thread* self) 1602 cbz w0, 1f // If result is null, deliver the OOME. 1603 .cfi_remember_state 1604 RESTORE_SAVE_EVERYTHING_FRAME_KEEP_X0 1605 REFRESH_MARKING_REGISTER 1606 ret // return 1607 .cfi_restore_state 1608 .cfi_def_cfa_offset FRAME_SIZE_SAVE_EVERYTHING // workaround for clang bug: 31975598 16091: 1610 DELIVER_PENDING_EXCEPTION_FRAME_READY 1611END \name 1612.endm 1613 1614.macro ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT name, entrypoint 1615 ONE_ARG_SAVE_EVERYTHING_DOWNCALL \name, \entrypoint, RUNTIME_SAVE_EVERYTHING_FOR_CLINIT_METHOD_OFFSET 1616.endm 1617 1618.macro RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER 1619 cbz w0, 1f // result zero branch over 1620 ret // return 16211: 1622 DELIVER_PENDING_EXCEPTION 1623.endm 1624 1625 /* 1626 * Entry from managed code that calls artHandleFillArrayDataFromCode and delivers exception on 1627 * failure. 1628 */ 1629TWO_ARG_REF_DOWNCALL art_quick_handle_fill_data, artHandleFillArrayDataFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1630 1631 /* 1632 * Entry from managed code when uninitialized static storage, this stub will run the class 1633 * initializer and deliver the exception on error. On success the static storage base is 1634 * returned. 1635 */ 1636ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT art_quick_initialize_static_storage, artInitializeStaticStorageFromCode 1637ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT art_quick_initialize_type, artInitializeTypeFromCode 1638ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_initialize_type_and_verify_access, artInitializeTypeAndVerifyAccessFromCode 1639ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_resolve_string, artResolveStringFromCode 1640 1641// Note: Functions `art{Get,Set}<Kind>{Static,Instance>FromCompiledCode` are 1642// defined by macros in runtime/entrypoints/quick/quick_field_entrypoints.cc. 1643 1644ONE_ARG_REF_DOWNCALL art_quick_get_boolean_static, artGetBooleanStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1645ONE_ARG_REF_DOWNCALL art_quick_get_byte_static, artGetByteStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1646ONE_ARG_REF_DOWNCALL art_quick_get_char_static, artGetCharStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1647ONE_ARG_REF_DOWNCALL art_quick_get_short_static, artGetShortStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1648ONE_ARG_REF_DOWNCALL art_quick_get32_static, artGet32StaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1649ONE_ARG_REF_DOWNCALL art_quick_get64_static, artGet64StaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1650ONE_ARG_REF_DOWNCALL art_quick_get_obj_static, artGetObjStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1651 1652TWO_ARG_REF_DOWNCALL art_quick_get_boolean_instance, artGetBooleanInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1653TWO_ARG_REF_DOWNCALL art_quick_get_byte_instance, artGetByteInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1654TWO_ARG_REF_DOWNCALL art_quick_get_char_instance, artGetCharInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1655TWO_ARG_REF_DOWNCALL art_quick_get_short_instance, artGetShortInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1656TWO_ARG_REF_DOWNCALL art_quick_get32_instance, artGet32InstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1657TWO_ARG_REF_DOWNCALL art_quick_get64_instance, artGet64InstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1658TWO_ARG_REF_DOWNCALL art_quick_get_obj_instance, artGetObjInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1659 1660TWO_ARG_REF_DOWNCALL art_quick_set8_static, artSet8StaticFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1661TWO_ARG_REF_DOWNCALL art_quick_set16_static, artSet16StaticFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1662TWO_ARG_REF_DOWNCALL art_quick_set32_static, artSet32StaticFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1663TWO_ARG_REF_DOWNCALL art_quick_set64_static, artSet64StaticFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1664TWO_ARG_REF_DOWNCALL art_quick_set_obj_static, artSetObjStaticFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1665 1666THREE_ARG_REF_DOWNCALL art_quick_set8_instance, artSet8InstanceFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1667THREE_ARG_REF_DOWNCALL art_quick_set16_instance, artSet16InstanceFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1668THREE_ARG_REF_DOWNCALL art_quick_set32_instance, artSet32InstanceFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1669THREE_ARG_REF_DOWNCALL art_quick_set64_instance, artSet64InstanceFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1670THREE_ARG_REF_DOWNCALL art_quick_set_obj_instance, artSetObjInstanceFromCompiledCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1671 1672// Generate the allocation entrypoints for each allocator. 1673GENERATE_ALLOC_ENTRYPOINTS_FOR_NON_TLAB_ALLOCATORS 1674// Comment out allocators that have arm64 specific asm. 1675// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_RESOLVED(_region_tlab, RegionTLAB) 1676// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_INITIALIZED(_region_tlab, RegionTLAB) 1677GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_WITH_ACCESS_CHECK(_region_tlab, RegionTLAB) 1678// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED(_region_tlab, RegionTLAB) 1679// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED8(_region_tlab, RegionTLAB) 1680// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED16(_region_tlab, RegionTLAB) 1681// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED32(_region_tlab, RegionTLAB) 1682// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED64(_region_tlab, RegionTLAB) 1683GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_BYTES(_region_tlab, RegionTLAB) 1684GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_CHARS(_region_tlab, RegionTLAB) 1685GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_STRING(_region_tlab, RegionTLAB) 1686 1687// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_RESOLVED(_tlab, TLAB) 1688// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_INITIALIZED(_tlab, TLAB) 1689GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_WITH_ACCESS_CHECK(_tlab, TLAB) 1690// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED(_tlab, TLAB) 1691// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED8(_tlab, TLAB) 1692// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED16(_tlab, TLAB) 1693// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED32(_tlab, TLAB) 1694// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED64(_tlab, TLAB) 1695GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_BYTES(_tlab, TLAB) 1696GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_CHARS(_tlab, TLAB) 1697GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_STRING(_tlab, TLAB) 1698 1699// If isInitialized=1 then the compiler assumes the object's class has already been initialized. 1700// If isInitialized=0 the compiler can only assume it's been at least resolved. 1701.macro ART_QUICK_ALLOC_OBJECT_ROSALLOC c_name, cxx_name, isInitialized 1702ENTRY \c_name 1703 // Fast path rosalloc allocation. 1704 // x0: type, xSELF(x19): Thread::Current 1705 // x1-x7: free. 1706 ldr x3, [xSELF, #THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET] // Check if the thread local 1707 // allocation stack has room. 1708 // ldp won't work due to large offset. 1709 ldr x4, [xSELF, #THREAD_LOCAL_ALLOC_STACK_END_OFFSET] 1710 cmp x3, x4 1711 bhs .Lslow_path\c_name 1712 ldr w3, [x0, #MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET] // Load the object size (x3) 1713 cmp x3, #ROSALLOC_MAX_THREAD_LOCAL_BRACKET_SIZE // Check if the size is for a thread 1714 // local allocation. Also does the 1715 // finalizable and initialization 1716 // checks. 1717 // When isInitialized == 0, then the class is potentially not yet initialized. 1718 // If the class is not yet initialized, the object size will be very large to force the branch 1719 // below to be taken. 1720 // 1721 // See InitializeClassVisitors in class-inl.h for more details. 1722 bhs .Lslow_path\c_name 1723 // Compute the rosalloc bracket index 1724 // from the size. Since the size is 1725 // already aligned we can combine the 1726 // two shifts together. 1727 add x4, xSELF, x3, lsr #(ROSALLOC_BRACKET_QUANTUM_SIZE_SHIFT - POINTER_SIZE_SHIFT) 1728 // Subtract pointer size since ther 1729 // are no runs for 0 byte allocations 1730 // and the size is already aligned. 1731 ldr x4, [x4, #(THREAD_ROSALLOC_RUNS_OFFSET - __SIZEOF_POINTER__)] 1732 // Load the free list head (x3). This 1733 // will be the return val. 1734 ldr x3, [x4, #(ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)] 1735 cbz x3, .Lslow_path\c_name 1736 // "Point of no slow path". Won't go to the slow path from here on. OK to clobber x0 and x1. 1737 ldr x1, [x3, #ROSALLOC_SLOT_NEXT_OFFSET] // Load the next pointer of the head 1738 // and update the list head with the 1739 // next pointer. 1740 str x1, [x4, #(ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)] 1741 // Store the class pointer in the 1742 // header. This also overwrites the 1743 // next pointer. The offsets are 1744 // asserted to match. 1745 1746#if ROSALLOC_SLOT_NEXT_OFFSET != MIRROR_OBJECT_CLASS_OFFSET 1747#error "Class pointer needs to overwrite next pointer." 1748#endif 1749 POISON_HEAP_REF w0 1750 str w0, [x3, #MIRROR_OBJECT_CLASS_OFFSET] 1751 // Push the new object onto the thread 1752 // local allocation stack and 1753 // increment the thread local 1754 // allocation stack top. 1755 ldr x1, [xSELF, #THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET] 1756 str w3, [x1], #COMPRESSED_REFERENCE_SIZE // (Increment x1 as a side effect.) 1757 str x1, [xSELF, #THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET] 1758 // Decrement the size of the free list 1759 1760 // After this "STR" the object is published to the thread local allocation stack, 1761 // and it will be observable from a runtime internal (eg. Heap::VisitObjects) point of view. 1762 // It is not yet visible to the running (user) compiled code until after the return. 1763 // 1764 // To avoid the memory barrier prior to the "STR", a trick is employed, by differentiating 1765 // the state of the allocation stack slot. It can be a pointer to one of: 1766 // 0) Null entry, because the stack was bumped but the new pointer wasn't written yet. 1767 // (The stack initial state is "null" pointers). 1768 // 1) A partially valid object, with an invalid class pointer to the next free rosalloc slot. 1769 // 2) A fully valid object, with a valid class pointer pointing to a real class. 1770 // Other states are not allowed. 1771 // 1772 // An object that is invalid only temporarily, and will eventually become valid. 1773 // The internal runtime code simply checks if the object is not null or is partial and then 1774 // ignores it. 1775 // 1776 // (Note: The actual check is done by seeing if a non-null object has a class pointer pointing 1777 // to ClassClass, and that the ClassClass's class pointer is self-cyclic. A rosalloc free slot 1778 // "next" pointer is not-cyclic.) 1779 // 1780 // See also b/28790624 for a listing of CLs dealing with this race. 1781 ldr w1, [x4, #(ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_SIZE_OFFSET)] 1782 sub x1, x1, #1 1783 // TODO: consider combining this store 1784 // and the list head store above using 1785 // strd. 1786 str w1, [x4, #(ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_SIZE_OFFSET)] 1787 1788 mov x0, x3 // Set the return value and return. 1789.if \isInitialized == 0 1790 // This barrier is only necessary when the allocation also requires 1791 // a class initialization check. 1792 // 1793 // If the class is already observably initialized, then new-instance allocations are protected 1794 // from publishing by the compiler which inserts its own StoreStore barrier. 1795 dmb ish 1796 // Use a "dmb ish" fence here because if there are later loads of statics (e.g. class size), 1797 // they should happen-after the implicit initialization check. 1798 // 1799 // TODO: Remove this dmb for class initialization checks (b/36692143) by introducing 1800 // a new observably-initialized class state. 1801.endif 1802 ret 1803.Lslow_path\c_name: 1804 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1805 mov x1, xSELF // pass Thread::Current 1806 bl \cxx_name 1807 RESTORE_SAVE_REFS_ONLY_FRAME 1808 REFRESH_MARKING_REGISTER 1809 RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER 1810END \c_name 1811.endm 1812 1813ART_QUICK_ALLOC_OBJECT_ROSALLOC art_quick_alloc_object_resolved_rosalloc, artAllocObjectFromCodeResolvedRosAlloc, /* isInitialized */ 0 1814ART_QUICK_ALLOC_OBJECT_ROSALLOC art_quick_alloc_object_initialized_rosalloc, artAllocObjectFromCodeInitializedRosAlloc, /* isInitialized */ 1 1815 1816// If isInitialized=1 then the compiler assumes the object's class has already been initialized. 1817// If isInitialized=0 the compiler can only assume it's been at least resolved. 1818.macro ALLOC_OBJECT_TLAB_FAST_PATH_RESOLVED slowPathLabel isInitialized 1819 ldr x4, [xSELF, #THREAD_LOCAL_POS_OFFSET] 1820 ldr x5, [xSELF, #THREAD_LOCAL_END_OFFSET] 1821 ldr w7, [x0, #MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET] // Load the object size (x7). 1822 add x6, x4, x7 // Add object size to tlab pos. 1823 cmp x6, x5 // Check if it fits, overflow works 1824 // since the tlab pos and end are 32 1825 // bit values. 1826 1827 // When isInitialized == 0, then the class is potentially not yet initialized. 1828 // If the class is not yet initialized, the object size will be very large to force the branch 1829 // below to be taken. 1830 // 1831 // See InitializeClassVisitors in class-inl.h for more details. 1832 bhi \slowPathLabel 1833 str x6, [xSELF, #THREAD_LOCAL_POS_OFFSET] // Store new thread_local_pos. 1834 ldr x5, [xSELF, #THREAD_LOCAL_OBJECTS_OFFSET] // Increment thread_local_objects. 1835 add x5, x5, #1 1836 str x5, [xSELF, #THREAD_LOCAL_OBJECTS_OFFSET] 1837 POISON_HEAP_REF w0 1838 str w0, [x4, #MIRROR_OBJECT_CLASS_OFFSET] // Store the class pointer. 1839 // Fence. This is "ish" not "ishst" so 1840 // that the code after this allocation 1841 // site will see the right values in 1842 // the fields of the class. 1843 mov x0, x4 1844.if \isInitialized == 0 1845 // This barrier is only necessary when the allocation also requires 1846 // a class initialization check. 1847 // 1848 // If the class is already observably initialized, then new-instance allocations are protected 1849 // from publishing by the compiler which inserts its own StoreStore barrier. 1850 dmb ish 1851 // Use a "dmb ish" fence here because if there are later loads of statics (e.g. class size), 1852 // they should happen-after the implicit initialization check. 1853 // 1854 // TODO: Remove this dmb for class initialization checks (b/36692143) by introducing 1855 // a new observably-initialized class state. 1856.endif 1857 ret 1858.endm 1859 1860// The common code for art_quick_alloc_object_*region_tlab 1861.macro GENERATE_ALLOC_OBJECT_RESOLVED_TLAB name, entrypoint, isInitialized 1862ENTRY \name 1863 // Fast path region tlab allocation. 1864 // x0: type, xSELF(x19): Thread::Current 1865 // x1-x7: free. 1866 ALLOC_OBJECT_TLAB_FAST_PATH_RESOLVED .Lslow_path\name, \isInitialized 1867.Lslow_path\name: 1868 SETUP_SAVE_REFS_ONLY_FRAME // Save callee saves in case of GC. 1869 mov x1, xSELF // Pass Thread::Current. 1870 bl \entrypoint // (mirror::Class*, Thread*) 1871 RESTORE_SAVE_REFS_ONLY_FRAME 1872 REFRESH_MARKING_REGISTER 1873 RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER 1874END \name 1875.endm 1876 1877GENERATE_ALLOC_OBJECT_RESOLVED_TLAB art_quick_alloc_object_resolved_region_tlab, artAllocObjectFromCodeResolvedRegionTLAB, /* isInitialized */ 0 1878GENERATE_ALLOC_OBJECT_RESOLVED_TLAB art_quick_alloc_object_initialized_region_tlab, artAllocObjectFromCodeInitializedRegionTLAB, /* isInitialized */ 1 1879GENERATE_ALLOC_OBJECT_RESOLVED_TLAB art_quick_alloc_object_resolved_tlab, artAllocObjectFromCodeResolvedTLAB, /* isInitialized */ 0 1880GENERATE_ALLOC_OBJECT_RESOLVED_TLAB art_quick_alloc_object_initialized_tlab, artAllocObjectFromCodeInitializedTLAB, /* isInitialized */ 1 1881 1882.macro ALLOC_ARRAY_TLAB_FAST_PATH_RESOLVED_WITH_SIZE slowPathLabel, xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1883 and \xTemp1, \xTemp1, #OBJECT_ALIGNMENT_MASK_TOGGLED64 // Apply alignment mask 1884 // (addr + 7) & ~7. The mask must 1885 // be 64 bits to keep high bits in 1886 // case of overflow. 1887 // Negative sized arrays are handled here since xCount holds a zero extended 32 bit value. 1888 // Negative ints become large 64 bit unsigned ints which will always be larger than max signed 1889 // 32 bit int. Since the max shift for arrays is 3, it can not become a negative 64 bit int. 1890 cmp \xTemp1, #MIN_LARGE_OBJECT_THRESHOLD // Possibly a large object, go slow 1891 bhs \slowPathLabel // path. 1892 1893 ldr \xTemp0, [xSELF, #THREAD_LOCAL_POS_OFFSET] // Check tlab for space, note that 1894 // we use (end - begin) to handle 1895 // negative size arrays. It is 1896 // assumed that a negative size will 1897 // always be greater unsigned than 1898 // region size. 1899 ldr \xTemp2, [xSELF, #THREAD_LOCAL_END_OFFSET] 1900 sub \xTemp2, \xTemp2, \xTemp0 1901 cmp \xTemp1, \xTemp2 1902 1903 // The array class is always initialized here. Unlike new-instance, 1904 // this does not act as a double test. 1905 bhi \slowPathLabel 1906 // "Point of no slow path". Won't go to the slow path from here on. OK to clobber x0 and x1. 1907 // Move old thread_local_pos to x0 1908 // for the return value. 1909 mov x0, \xTemp0 1910 add \xTemp0, \xTemp0, \xTemp1 1911 str \xTemp0, [xSELF, #THREAD_LOCAL_POS_OFFSET] // Store new thread_local_pos. 1912 ldr \xTemp0, [xSELF, #THREAD_LOCAL_OBJECTS_OFFSET] // Increment thread_local_objects. 1913 add \xTemp0, \xTemp0, #1 1914 str \xTemp0, [xSELF, #THREAD_LOCAL_OBJECTS_OFFSET] 1915 POISON_HEAP_REF \wClass 1916 str \wClass, [x0, #MIRROR_OBJECT_CLASS_OFFSET] // Store the class pointer. 1917 str \wCount, [x0, #MIRROR_ARRAY_LENGTH_OFFSET] // Store the array length. 1918 // Fence. 1919// new-array is special. The class is loaded and immediately goes to the Initialized state 1920// before it is published. Therefore the only fence needed is for the publication of the object. 1921// See ClassLinker::CreateArrayClass() for more details. 1922 1923// For publication of the new array, we don't need a 'dmb ishst' here. 1924// The compiler generates 'dmb ishst' for all new-array insts. 1925 ret 1926.endm 1927 1928.macro GENERATE_ALLOC_ARRAY_TLAB name, entrypoint, size_setup 1929ENTRY \name 1930 // Fast path array allocation for region tlab allocation. 1931 // x0: mirror::Class* type 1932 // x1: int32_t component_count 1933 // x2-x7: free. 1934 mov x3, x0 1935 \size_setup x3, w3, x1, w1, x4, w4, x5, w5, x6, w6 1936 ALLOC_ARRAY_TLAB_FAST_PATH_RESOLVED_WITH_SIZE .Lslow_path\name, x3, w3, x1, w1, x4, w4, x5, w5, x6, w6 1937.Lslow_path\name: 1938 // x0: mirror::Class* klass 1939 // x1: int32_t component_count 1940 // x2: Thread* self 1941 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves in case of GC 1942 mov x2, xSELF // pass Thread::Current 1943 bl \entrypoint 1944 RESTORE_SAVE_REFS_ONLY_FRAME 1945 REFRESH_MARKING_REGISTER 1946 RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER 1947END \name 1948.endm 1949 1950.macro COMPUTE_ARRAY_SIZE_UNKNOWN xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1951 // Array classes are never finalizable or uninitialized, no need to check. 1952 ldr \wTemp0, [\xClass, #MIRROR_CLASS_COMPONENT_TYPE_OFFSET] // Load component type 1953 UNPOISON_HEAP_REF \wTemp0 1954 ldr \wTemp0, [\xTemp0, #MIRROR_CLASS_OBJECT_PRIMITIVE_TYPE_OFFSET] 1955 lsr \xTemp0, \xTemp0, #PRIMITIVE_TYPE_SIZE_SHIFT_SHIFT // Component size shift is in high 16 1956 // bits. 1957 // xCount is holding a 32 bit value, 1958 // it can not overflow. 1959 lsl \xTemp1, \xCount, \xTemp0 // Calculate data size 1960 // Add array data offset and alignment. 1961 add \xTemp1, \xTemp1, #(MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) 1962#if MIRROR_LONG_ARRAY_DATA_OFFSET != MIRROR_INT_ARRAY_DATA_OFFSET + 4 1963#error Long array data offset must be 4 greater than int array data offset. 1964#endif 1965 1966 add \xTemp0, \xTemp0, #1 // Add 4 to the length only if the 1967 // component size shift is 3 1968 // (for 64 bit alignment). 1969 and \xTemp0, \xTemp0, #4 1970 add \xTemp1, \xTemp1, \xTemp0 1971.endm 1972 1973.macro COMPUTE_ARRAY_SIZE_8 xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1974 // Add array data offset and alignment. 1975 add \xTemp1, \xCount, #(MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) 1976.endm 1977 1978.macro COMPUTE_ARRAY_SIZE_16 xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1979 lsl \xTemp1, \xCount, #1 1980 // Add array data offset and alignment. 1981 add \xTemp1, \xTemp1, #(MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) 1982.endm 1983 1984.macro COMPUTE_ARRAY_SIZE_32 xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1985 lsl \xTemp1, \xCount, #2 1986 // Add array data offset and alignment. 1987 add \xTemp1, \xTemp1, #(MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) 1988.endm 1989 1990.macro COMPUTE_ARRAY_SIZE_64 xClass, wClass, xCount, wCount, xTemp0, wTemp0, xTemp1, wTemp1, xTemp2, wTemp2 1991 lsl \xTemp1, \xCount, #3 1992 // Add array data offset and alignment. 1993 add \xTemp1, \xTemp1, #(MIRROR_WIDE_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) 1994.endm 1995 1996// TODO(ngeoffray): art_quick_alloc_array_resolved_region_tlab is not used for arm64, remove 1997// the entrypoint once all backends have been updated to use the size variants. 1998GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_UNKNOWN 1999GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved8_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_8 2000GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved16_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_16 2001GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved32_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_32 2002GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved64_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_64 2003GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_UNKNOWN 2004GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved8_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_8 2005GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved16_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_16 2006GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved32_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_32 2007GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved64_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_64 2008 2009 /* 2010 * Called by managed code when the thread has been asked to suspend. 2011 */ 2012 .extern artTestSuspendFromCode 2013ENTRY art_quick_test_suspend 2014 SETUP_SAVE_EVERYTHING_FRAME RUNTIME_SAVE_EVERYTHING_FOR_SUSPEND_CHECK_METHOD_OFFSET // save callee saves for stack crawl 2015 mov x0, xSELF 2016 bl artTestSuspendFromCode // (Thread*) 2017 RESTORE_SAVE_EVERYTHING_FRAME 2018 REFRESH_MARKING_REGISTER 2019 ret 2020END art_quick_test_suspend 2021 2022ENTRY art_quick_implicit_suspend 2023 mov x0, xSELF 2024 SETUP_SAVE_REFS_ONLY_FRAME // save callee saves for stack crawl 2025 bl artTestSuspendFromCode // (Thread*) 2026 RESTORE_SAVE_REFS_ONLY_FRAME 2027 REFRESH_MARKING_REGISTER 2028 ret 2029END art_quick_implicit_suspend 2030 2031 /* 2032 * Called by managed code that is attempting to call a method on a proxy class. On entry 2033 * x0 holds the proxy method and x1 holds the receiver; The frame size of the invoked proxy 2034 * method agrees with a ref and args callee save frame. 2035 */ 2036 .extern artQuickProxyInvokeHandler 2037ENTRY art_quick_proxy_invoke_handler 2038 SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_X0 2039 mov x2, xSELF // pass Thread::Current 2040 mov x3, sp // pass SP 2041 bl artQuickProxyInvokeHandler // (Method* proxy method, receiver, Thread*, SP) 2042 ldr x2, [xSELF, THREAD_EXCEPTION_OFFSET] 2043 cbnz x2, .Lexception_in_proxy // success if no exception is pending 2044 RESTORE_SAVE_REFS_AND_ARGS_FRAME // Restore frame 2045 REFRESH_MARKING_REGISTER 2046 fmov d0, x0 // Store result in d0 in case it was float or double 2047 ret // return on success 2048.Lexception_in_proxy: 2049 RESTORE_SAVE_REFS_AND_ARGS_FRAME 2050 DELIVER_PENDING_EXCEPTION 2051END art_quick_proxy_invoke_handler 2052 2053 /* 2054 * Called to resolve an imt conflict. 2055 * x0 is the conflict ArtMethod. 2056 * xIP1 is a hidden argument that holds the target interface method's dex method index. 2057 * 2058 * Note that this stub writes to xIP0, xIP1, x13-x15, and x0. 2059 */ 2060 .extern artLookupResolvedMethod 2061ENTRY art_quick_imt_conflict_trampoline 2062 ldr xIP0, [sp, #0] // Load referrer 2063 ubfx x15, xIP1, #0, #METHOD_DEX_CACHE_HASH_BITS // Calculate DexCache method slot index. 2064 ldr xIP0, [xIP0, #ART_METHOD_DEX_CACHE_METHODS_OFFSET_64] // Load dex cache methods array 2065 add xIP0, xIP0, x15, lsl #(POINTER_SIZE_SHIFT + 1) // Load DexCache method slot address. 2066 2067 // Relaxed atomic load x14:x15 from the dex cache slot. 2068.Limt_conflict_trampoline_retry_load: 2069 ldxp x14, x15, [xIP0] 2070 stxp w13, x14, x15, [xIP0] 2071 cbnz w13, .Limt_conflict_trampoline_retry_load 2072 2073 cmp x15, xIP1 // Compare method index to see if we had a DexCache method hit. 2074 bne .Limt_conflict_trampoline_dex_cache_miss 2075.Limt_conflict_trampoline_have_interface_method: 2076 ldr xIP1, [x0, #ART_METHOD_JNI_OFFSET_64] // Load ImtConflictTable 2077 ldr x0, [xIP1] // Load first entry in ImtConflictTable. 2078.Limt_table_iterate: 2079 cmp x0, x14 2080 // Branch if found. Benchmarks have shown doing a branch here is better. 2081 beq .Limt_table_found 2082 // If the entry is null, the interface method is not in the ImtConflictTable. 2083 cbz x0, .Lconflict_trampoline 2084 // Iterate over the entries of the ImtConflictTable. 2085 ldr x0, [xIP1, #(2 * __SIZEOF_POINTER__)]! 2086 b .Limt_table_iterate 2087.Limt_table_found: 2088 // We successfully hit an entry in the table. Load the target method 2089 // and jump to it. 2090 ldr x0, [xIP1, #__SIZEOF_POINTER__] 2091 ldr xIP0, [x0, #ART_METHOD_QUICK_CODE_OFFSET_64] 2092 br xIP0 2093.Lconflict_trampoline: 2094 // Call the runtime stub to populate the ImtConflictTable and jump to the 2095 // resolved method. 2096 mov x0, x14 // Load interface method 2097 INVOKE_TRAMPOLINE_BODY artInvokeInterfaceTrampoline 2098.Limt_conflict_trampoline_dex_cache_miss: 2099 // We're not creating a proper runtime method frame here, 2100 // artLookupResolvedMethod() is not allowed to walk the stack. 2101 2102 // Save GPR args and return address, allocate space for FPR args, align stack. 2103 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, (8 * 8 + 8 * 8 + 8 + 8) 2104 SAVE_TWO_REGS x2, x3, 16 2105 SAVE_TWO_REGS x4, x5, 32 2106 SAVE_TWO_REGS x6, x7, 48 2107 SAVE_REG xLR, (8 * 8 + 8 * 8 + 8) 2108 2109 // Save FPR args. 2110 stp d0, d1, [sp, #64] 2111 stp d2, d3, [sp, #80] 2112 stp d4, d5, [sp, #96] 2113 stp d6, d7, [sp, #112] 2114 2115 mov x0, xIP1 // Pass method index. 2116 ldr x1, [sp, #(8 * 8 + 8 * 8 + 8 + 8)] // Pass referrer. 2117 bl artLookupResolvedMethod // (uint32_t method_index, ArtMethod* referrer) 2118 mov x14, x0 // Move the interface method to x14 where the loop above expects it. 2119 2120 // Restore FPR args. 2121 ldp d0, d1, [sp, #64] 2122 ldp d2, d3, [sp, #80] 2123 ldp d4, d5, [sp, #96] 2124 ldp d6, d7, [sp, #112] 2125 2126 // Restore GPR args and return address. 2127 RESTORE_REG xLR, (8 * 8 + 8 * 8 + 8) 2128 RESTORE_TWO_REGS x2, x3, 16 2129 RESTORE_TWO_REGS x4, x5, 32 2130 RESTORE_TWO_REGS x6, x7, 48 2131 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, (8 * 8 + 8 * 8 + 8 + 8) 2132 2133 // If the method wasn't resolved, skip the lookup and go to artInvokeInterfaceTrampoline(). 2134 cbz x14, .Lconflict_trampoline 2135 b .Limt_conflict_trampoline_have_interface_method 2136END art_quick_imt_conflict_trampoline 2137 2138ENTRY art_quick_resolution_trampoline 2139 SETUP_SAVE_REFS_AND_ARGS_FRAME 2140 mov x2, xSELF 2141 mov x3, sp 2142 bl artQuickResolutionTrampoline // (called, receiver, Thread*, SP) 2143 cbz x0, 1f 2144 mov xIP0, x0 // Remember returned code pointer in xIP0. 2145 ldr x0, [sp, #0] // artQuickResolutionTrampoline puts called method in *SP. 2146 RESTORE_SAVE_REFS_AND_ARGS_FRAME 2147 REFRESH_MARKING_REGISTER 2148 br xIP0 21491: 2150 RESTORE_SAVE_REFS_AND_ARGS_FRAME 2151 DELIVER_PENDING_EXCEPTION 2152END art_quick_resolution_trampoline 2153 2154/* 2155 * Generic JNI frame layout: 2156 * 2157 * #-------------------# 2158 * | | 2159 * | caller method... | 2160 * #-------------------# <--- SP on entry 2161 * | Return X30/LR | 2162 * | X29/FP | callee save 2163 * | X28 | callee save 2164 * | X27 | callee save 2165 * | X26 | callee save 2166 * | X25 | callee save 2167 * | X24 | callee save 2168 * | X23 | callee save 2169 * | X22 | callee save 2170 * | X21 | callee save 2171 * | X20 | callee save 2172 * | X19 | callee save 2173 * | X7 | arg7 2174 * | X6 | arg6 2175 * | X5 | arg5 2176 * | X4 | arg4 2177 * | X3 | arg3 2178 * | X2 | arg2 2179 * | X1 | arg1 2180 * | D7 | float arg 8 2181 * | D6 | float arg 7 2182 * | D5 | float arg 6 2183 * | D4 | float arg 5 2184 * | D3 | float arg 4 2185 * | D2 | float arg 3 2186 * | D1 | float arg 2 2187 * | D0 | float arg 1 2188 * | Method* | <- X0 2189 * #-------------------# 2190 * | local ref cookie | // 4B 2191 * | handle scope size | // 4B 2192 * #-------------------# 2193 * | JNI Call Stack | 2194 * #-------------------# <--- SP on native call 2195 * | | 2196 * | Stack for Regs | The trampoline assembly will pop these values 2197 * | | into registers for native call 2198 * #-------------------# 2199 * | Native code ptr | 2200 * #-------------------# 2201 * | Free scratch | 2202 * #-------------------# 2203 * | Ptr to (1) | <--- SP 2204 * #-------------------# 2205 */ 2206 /* 2207 * Called to do a generic JNI down-call 2208 */ 2209ENTRY art_quick_generic_jni_trampoline 2210 SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_X0 2211 2212 // Save SP , so we can have static CFI info. 2213 mov x28, sp 2214 .cfi_def_cfa_register x28 2215 2216 // This looks the same, but is different: this will be updated to point to the bottom 2217 // of the frame when the handle scope is inserted. 2218 mov xFP, sp 2219 2220 mov xIP0, #5120 2221 sub sp, sp, xIP0 2222 2223 // prepare for artQuickGenericJniTrampoline call 2224 // (Thread*, SP) 2225 // x0 x1 <= C calling convention 2226 // xSELF xFP <= where they are 2227 2228 mov x0, xSELF // Thread* 2229 mov x1, xFP 2230 bl artQuickGenericJniTrampoline // (Thread*, sp) 2231 2232 // The C call will have registered the complete save-frame on success. 2233 // The result of the call is: 2234 // x0: pointer to native code, 0 on error. 2235 // x1: pointer to the bottom of the used area of the alloca, can restore stack till there. 2236 2237 // Check for error = 0. 2238 cbz x0, .Lexception_in_native 2239 2240 // Release part of the alloca. 2241 mov sp, x1 2242 2243 // Save the code pointer 2244 mov xIP0, x0 2245 2246 // Load parameters from frame into registers. 2247 // TODO Check with artQuickGenericJniTrampoline. 2248 // Also, check again APPCS64 - the stack arguments are interleaved. 2249 ldp x0, x1, [sp] 2250 ldp x2, x3, [sp, #16] 2251 ldp x4, x5, [sp, #32] 2252 ldp x6, x7, [sp, #48] 2253 2254 ldp d0, d1, [sp, #64] 2255 ldp d2, d3, [sp, #80] 2256 ldp d4, d5, [sp, #96] 2257 ldp d6, d7, [sp, #112] 2258 2259 add sp, sp, #128 2260 2261 blr xIP0 // native call. 2262 2263 // result sign extension is handled in C code 2264 // prepare for artQuickGenericJniEndTrampoline call 2265 // (Thread*, result, result_f) 2266 // x0 x1 x2 <= C calling convention 2267 mov x1, x0 // Result (from saved). 2268 mov x0, xSELF // Thread register. 2269 fmov x2, d0 // d0 will contain floating point result, but needs to go into x2 2270 2271 bl artQuickGenericJniEndTrampoline 2272 2273 // Pending exceptions possible. 2274 ldr x2, [xSELF, THREAD_EXCEPTION_OFFSET] 2275 cbnz x2, .Lexception_in_native 2276 2277 // Tear down the alloca. 2278 mov sp, x28 2279 .cfi_def_cfa_register sp 2280 2281 // Tear down the callee-save frame. 2282 RESTORE_SAVE_REFS_AND_ARGS_FRAME 2283 REFRESH_MARKING_REGISTER 2284 2285 // store into fpr, for when it's a fpr return... 2286 fmov d0, x0 2287 ret 2288 2289.Lexception_in_native: 2290 // Move to x1 then sp to please assembler. 2291 ldr x1, [xSELF, # THREAD_TOP_QUICK_FRAME_OFFSET] 2292 mov sp, x1 2293 .cfi_def_cfa_register sp 2294 # This will create a new save-all frame, required by the runtime. 2295 DELIVER_PENDING_EXCEPTION 2296END art_quick_generic_jni_trampoline 2297 2298/* 2299 * Called to bridge from the quick to interpreter ABI. On entry the arguments match those 2300 * of a quick call: 2301 * x0 = method being called/to bridge to. 2302 * x1..x7, d0..d7 = arguments to that method. 2303 */ 2304ENTRY art_quick_to_interpreter_bridge 2305 SETUP_SAVE_REFS_AND_ARGS_FRAME // Set up frame and save arguments. 2306 2307 // x0 will contain mirror::ArtMethod* method. 2308 mov x1, xSELF // How to get Thread::Current() ??? 2309 mov x2, sp 2310 2311 // uint64_t artQuickToInterpreterBridge(mirror::ArtMethod* method, Thread* self, 2312 // mirror::ArtMethod** sp) 2313 bl artQuickToInterpreterBridge 2314 2315 RESTORE_SAVE_REFS_AND_ARGS_FRAME // TODO: no need to restore arguments in this case. 2316 REFRESH_MARKING_REGISTER 2317 2318 fmov d0, x0 2319 2320 RETURN_OR_DELIVER_PENDING_EXCEPTION 2321END art_quick_to_interpreter_bridge 2322 2323/* 2324 * Called to attempt to execute an obsolete method. 2325 */ 2326ONE_ARG_RUNTIME_EXCEPTION art_invoke_obsolete_method_stub, artInvokeObsoleteMethod 2327 2328 2329// 2330// Instrumentation-related stubs 2331// 2332 .extern artInstrumentationMethodEntryFromCode 2333ENTRY art_quick_instrumentation_entry 2334 SETUP_SAVE_REFS_AND_ARGS_FRAME 2335 2336 mov x20, x0 // Preserve method reference in a callee-save. 2337 2338 mov x2, xSELF 2339 mov x3, sp // Pass SP 2340 bl artInstrumentationMethodEntryFromCode // (Method*, Object*, Thread*, SP) 2341 2342 mov xIP0, x0 // x0 = result of call. 2343 mov x0, x20 // Reload method reference. 2344 2345 RESTORE_SAVE_REFS_AND_ARGS_FRAME // Note: will restore xSELF 2346 REFRESH_MARKING_REGISTER 2347 cbz xIP0, 1f // Deliver the pending exception if method is null. 2348 adr xLR, art_quick_instrumentation_exit 2349 br xIP0 // Tail-call method with lr set to art_quick_instrumentation_exit. 2350 23511: 2352 DELIVER_PENDING_EXCEPTION 2353END art_quick_instrumentation_entry 2354 2355 .extern artInstrumentationMethodExitFromCode 2356ENTRY art_quick_instrumentation_exit 2357 mov xLR, #0 // Clobber LR for later checks. 2358 2359 SETUP_SAVE_REFS_ONLY_FRAME 2360 2361 str x0, [sp, #-16]! // Save integer result. 2362 .cfi_adjust_cfa_offset 16 2363 str d0, [sp, #8] // Save floating-point result. 2364 2365 add x3, sp, #8 // Pass floating-point result pointer. 2366 mov x2, sp // Pass integer result pointer. 2367 add x1, sp, #16 // Pass SP. 2368 mov x0, xSELF // Pass Thread. 2369 bl artInstrumentationMethodExitFromCode // (Thread*, SP, gpr_res*, fpr_res*) 2370 2371 mov xIP0, x0 // Return address from instrumentation call. 2372 mov xLR, x1 // r1 is holding link register if we're to bounce to deoptimize 2373 2374 ldr d0, [sp, #8] // Restore floating-point result. 2375 ldr x0, [sp], #16 // Restore integer result, and drop stack area. 2376 .cfi_adjust_cfa_offset -16 2377 2378 RESTORE_SAVE_REFS_ONLY_FRAME 2379 REFRESH_MARKING_REGISTER 2380 cbz xIP0, 1f // Handle error 2381 br xIP0 // Tail-call out. 23821: 2383 DELIVER_PENDING_EXCEPTION 2384END art_quick_instrumentation_exit 2385 2386 /* 2387 * Instrumentation has requested that we deoptimize into the interpreter. The deoptimization 2388 * will long jump to the upcall with a special exception of -1. 2389 */ 2390 .extern artDeoptimize 2391ENTRY art_quick_deoptimize 2392 SETUP_SAVE_ALL_CALLEE_SAVES_FRAME 2393 mov x0, xSELF // Pass thread. 2394 bl artDeoptimize // (Thread*) 2395 brk 0 2396END art_quick_deoptimize 2397 2398 /* 2399 * Compiled code has requested that we deoptimize into the interpreter. The deoptimization 2400 * will long jump to the upcall with a special exception of -1. 2401 */ 2402 .extern artDeoptimizeFromCompiledCode 2403ENTRY art_quick_deoptimize_from_compiled_code 2404 SETUP_SAVE_EVERYTHING_FRAME 2405 mov x1, xSELF // Pass thread. 2406 bl artDeoptimizeFromCompiledCode // (DeoptimizationKind, Thread*) 2407 brk 0 2408END art_quick_deoptimize_from_compiled_code 2409 2410 2411 /* 2412 * String's indexOf. 2413 * 2414 * TODO: Not very optimized. 2415 * On entry: 2416 * x0: string object (known non-null) 2417 * w1: char to match (known <= 0xFFFF) 2418 * w2: Starting offset in string data 2419 */ 2420ENTRY art_quick_indexof 2421#if (STRING_COMPRESSION_FEATURE) 2422 ldr w4, [x0, #MIRROR_STRING_COUNT_OFFSET] 2423#else 2424 ldr w3, [x0, #MIRROR_STRING_COUNT_OFFSET] 2425#endif 2426 add x0, x0, #MIRROR_STRING_VALUE_OFFSET 2427#if (STRING_COMPRESSION_FEATURE) 2428 /* w4 holds count (with flag) and w3 holds actual length */ 2429 lsr w3, w4, #1 2430#endif 2431 /* Clamp start to [0..count] */ 2432 cmp w2, #0 2433 csel w2, wzr, w2, lt 2434 cmp w2, w3 2435 csel w2, w3, w2, gt 2436 2437 /* Save a copy to compute result */ 2438 mov x5, x0 2439 2440#if (STRING_COMPRESSION_FEATURE) 2441 tbz w4, #0, .Lstring_indexof_compressed 2442#endif 2443 /* Build pointer to start of data to compare and pre-bias */ 2444 add x0, x0, x2, lsl #1 2445 sub x0, x0, #2 2446 /* Compute iteration count */ 2447 sub w2, w3, w2 2448 2449 /* 2450 * At this point we have: 2451 * x0: start of the data to test 2452 * w1: char to compare 2453 * w2: iteration count 2454 * x5: original start of string data 2455 */ 2456 2457 subs w2, w2, #4 2458 b.lt .Lindexof_remainder 2459 2460.Lindexof_loop4: 2461 ldrh w6, [x0, #2]! 2462 ldrh w7, [x0, #2]! 2463 ldrh wIP0, [x0, #2]! 2464 ldrh wIP1, [x0, #2]! 2465 cmp w6, w1 2466 b.eq .Lmatch_0 2467 cmp w7, w1 2468 b.eq .Lmatch_1 2469 cmp wIP0, w1 2470 b.eq .Lmatch_2 2471 cmp wIP1, w1 2472 b.eq .Lmatch_3 2473 subs w2, w2, #4 2474 b.ge .Lindexof_loop4 2475 2476.Lindexof_remainder: 2477 adds w2, w2, #4 2478 b.eq .Lindexof_nomatch 2479 2480.Lindexof_loop1: 2481 ldrh w6, [x0, #2]! 2482 cmp w6, w1 2483 b.eq .Lmatch_3 2484 subs w2, w2, #1 2485 b.ne .Lindexof_loop1 2486 2487.Lindexof_nomatch: 2488 mov x0, #-1 2489 ret 2490 2491.Lmatch_0: 2492 sub x0, x0, #6 2493 sub x0, x0, x5 2494 asr x0, x0, #1 2495 ret 2496.Lmatch_1: 2497 sub x0, x0, #4 2498 sub x0, x0, x5 2499 asr x0, x0, #1 2500 ret 2501.Lmatch_2: 2502 sub x0, x0, #2 2503 sub x0, x0, x5 2504 asr x0, x0, #1 2505 ret 2506.Lmatch_3: 2507 sub x0, x0, x5 2508 asr x0, x0, #1 2509 ret 2510#if (STRING_COMPRESSION_FEATURE) 2511 /* 2512 * Comparing compressed string character-per-character with 2513 * input character 2514 */ 2515.Lstring_indexof_compressed: 2516 add x0, x0, x2 2517 sub x0, x0, #1 2518 sub w2, w3, w2 2519.Lstring_indexof_compressed_loop: 2520 subs w2, w2, #1 2521 b.lt .Lindexof_nomatch 2522 ldrb w6, [x0, #1]! 2523 cmp w6, w1 2524 b.eq .Lstring_indexof_compressed_matched 2525 b .Lstring_indexof_compressed_loop 2526.Lstring_indexof_compressed_matched: 2527 sub x0, x0, x5 2528 ret 2529#endif 2530END art_quick_indexof 2531 2532 /* 2533 * Create a function `name` calling the ReadBarrier::Mark routine, 2534 * getting its argument and returning its result through W register 2535 * `wreg` (corresponding to X register `xreg`), saving and restoring 2536 * all caller-save registers. 2537 * 2538 * If `wreg` is different from `w0`, the generated function follows a 2539 * non-standard runtime calling convention: 2540 * - register `wreg` is used to pass the (sole) argument of this 2541 * function (instead of W0); 2542 * - register `wreg` is used to return the result of this function 2543 * (instead of W0); 2544 * - W0 is treated like a normal (non-argument) caller-save register; 2545 * - everything else is the same as in the standard runtime calling 2546 * convention (e.g. standard callee-save registers are preserved). 2547 */ 2548.macro READ_BARRIER_MARK_REG name, wreg, xreg 2549ENTRY \name 2550 // Reference is null, no work to do at all. 2551 cbz \wreg, .Lret_rb_\name 2552 // Use wIP0 as temp and check the mark bit of the reference. wIP0 is not used by the compiler. 2553 ldr wIP0, [\xreg, #MIRROR_OBJECT_LOCK_WORD_OFFSET] 2554 tbz wIP0, #LOCK_WORD_MARK_BIT_SHIFT, .Lnot_marked_rb_\name 2555.Lret_rb_\name: 2556 ret 2557.Lnot_marked_rb_\name: 2558 // Check if the top two bits are one, if this is the case it is a forwarding address. 2559 tst wIP0, wIP0, lsl #1 2560 bmi .Lret_forwarding_address\name 2561.Lslow_rb_\name: 2562 /* 2563 * Allocate 44 stack slots * 8 = 352 bytes: 2564 * - 20 slots for core registers X0-15, X17-X19, LR 2565 * - 24 slots for floating-point registers D0-D7 and D16-D31 2566 */ 2567 // We must not clobber IP1 since code emitted for HLoadClass and HLoadString 2568 // relies on IP1 being preserved. 2569 // Save all potentially live caller-save core registers. 2570 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, 352 2571 SAVE_TWO_REGS x2, x3, 16 2572 SAVE_TWO_REGS x4, x5, 32 2573 SAVE_TWO_REGS x6, x7, 48 2574 SAVE_TWO_REGS x8, x9, 64 2575 SAVE_TWO_REGS x10, x11, 80 2576 SAVE_TWO_REGS x12, x13, 96 2577 SAVE_TWO_REGS x14, x15, 112 2578 SAVE_TWO_REGS x17, x18, 128 // Skip x16, i.e. IP0. 2579 SAVE_TWO_REGS x19, xLR, 144 // Save also return address. 2580 // Save all potentially live caller-save floating-point registers. 2581 stp d0, d1, [sp, #160] 2582 stp d2, d3, [sp, #176] 2583 stp d4, d5, [sp, #192] 2584 stp d6, d7, [sp, #208] 2585 stp d16, d17, [sp, #224] 2586 stp d18, d19, [sp, #240] 2587 stp d20, d21, [sp, #256] 2588 stp d22, d23, [sp, #272] 2589 stp d24, d25, [sp, #288] 2590 stp d26, d27, [sp, #304] 2591 stp d28, d29, [sp, #320] 2592 stp d30, d31, [sp, #336] 2593 2594 .ifnc \wreg, w0 2595 mov w0, \wreg // Pass arg1 - obj from `wreg` 2596 .endif 2597 bl artReadBarrierMark // artReadBarrierMark(obj) 2598 .ifnc \wreg, w0 2599 mov \wreg, w0 // Return result into `wreg` 2600 .endif 2601 2602 // Restore core regs, except `xreg`, as `wreg` is used to return the 2603 // result of this function (simply remove it from the stack instead). 2604 POP_REGS_NE x0, x1, 0, \xreg 2605 POP_REGS_NE x2, x3, 16, \xreg 2606 POP_REGS_NE x4, x5, 32, \xreg 2607 POP_REGS_NE x6, x7, 48, \xreg 2608 POP_REGS_NE x8, x9, 64, \xreg 2609 POP_REGS_NE x10, x11, 80, \xreg 2610 POP_REGS_NE x12, x13, 96, \xreg 2611 POP_REGS_NE x14, x15, 112, \xreg 2612 POP_REGS_NE x17, x18, 128, \xreg 2613 POP_REGS_NE x19, xLR, 144, \xreg // Restore also return address. 2614 // Restore floating-point registers. 2615 ldp d0, d1, [sp, #160] 2616 ldp d2, d3, [sp, #176] 2617 ldp d4, d5, [sp, #192] 2618 ldp d6, d7, [sp, #208] 2619 ldp d16, d17, [sp, #224] 2620 ldp d18, d19, [sp, #240] 2621 ldp d20, d21, [sp, #256] 2622 ldp d22, d23, [sp, #272] 2623 ldp d24, d25, [sp, #288] 2624 ldp d26, d27, [sp, #304] 2625 ldp d28, d29, [sp, #320] 2626 ldp d30, d31, [sp, #336] 2627 // Remove frame and return. 2628 DECREASE_FRAME 352 2629 ret 2630.Lret_forwarding_address\name: 2631 // Shift left by the forwarding address shift. This clears out the state bits since they are 2632 // in the top 2 bits of the lock word. 2633 lsl \wreg, wIP0, #LOCK_WORD_STATE_FORWARDING_ADDRESS_SHIFT 2634 ret 2635END \name 2636.endm 2637 2638READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg00, w0, x0 2639READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg01, w1, x1 2640READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg02, w2, x2 2641READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg03, w3, x3 2642READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg04, w4, x4 2643READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg05, w5, x5 2644READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg06, w6, x6 2645READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg07, w7, x7 2646READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg08, w8, x8 2647READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg09, w9, x9 2648READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg10, w10, x10 2649READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg11, w11, x11 2650READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg12, w12, x12 2651READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg13, w13, x13 2652READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg14, w14, x14 2653READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg15, w15, x15 2654// READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg16, w16, x16 ip0 is blocked 2655READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg17, w17, x17 2656READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg18, w18, x18 2657READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg19, w19, x19 2658READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg20, w20, x20 2659READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg21, w21, x21 2660READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg22, w22, x22 2661READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg23, w23, x23 2662READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg24, w24, x24 2663READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg25, w25, x25 2664READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg26, w26, x26 2665READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg27, w27, x27 2666READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg28, w28, x28 2667READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg29, w29, x29 2668 2669 2670.macro SELECT_X_OR_W_FOR_MACRO macro_to_use, x, w, xreg 2671 .if \xreg 2672 \macro_to_use \x 2673 .else 2674 \macro_to_use \w 2675 .endif 2676.endm 2677 2678.macro FOR_REGISTERS macro_for_register, macro_for_reserved_register, xreg 2679 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x0, w0, \xreg 2680 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x1, w1, \xreg 2681 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x2, w2, \xreg 2682 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x3, w3, \xreg 2683 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x4, w4, \xreg 2684 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x5, w5, \xreg 2685 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x6, w6, \xreg 2686 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x7, w7, \xreg 2687 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x8, w8, \xreg 2688 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x9, w9, \xreg 2689 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x10, w10, \xreg 2690 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x11, w11, \xreg 2691 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x12, w12, \xreg 2692 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x13, w13, \xreg 2693 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x14, w14, \xreg 2694 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x15, w15, \xreg 2695 \macro_for_reserved_register // IP0 is reserved 2696 \macro_for_reserved_register // IP1 is reserved 2697 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x18, w18, \xreg 2698 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x19, w19, \xreg 2699 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x20, w20, \xreg 2700 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x21, w21, \xreg 2701 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x22, w22, \xreg 2702 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x23, w23, \xreg 2703 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x24, w24, \xreg 2704 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x25, w25, \xreg 2705 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x26, w26, \xreg 2706 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x27, w27, \xreg 2707 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x28, w28, \xreg 2708 SELECT_X_OR_W_FOR_MACRO \macro_for_register, x29, w29, \xreg 2709 \macro_for_reserved_register // lr is reserved 2710 \macro_for_reserved_register // sp is reserved 2711.endm 2712 2713.macro FOR_XREGISTERS macro_for_register, macro_for_reserved_register 2714 FOR_REGISTERS \macro_for_register, \macro_for_reserved_register, /* xreg */ 1 2715.endm 2716 2717.macro FOR_WREGISTERS macro_for_register, macro_for_reserved_register 2718 FOR_REGISTERS \macro_for_register, \macro_for_reserved_register, /* xreg */ 0 2719.endm 2720 2721.macro BRK0_BRK0 2722 brk 0 2723 brk 0 2724.endm 2725 2726#if BAKER_MARK_INTROSPECTION_FIELD_LDR_OFFSET != BAKER_MARK_INTROSPECTION_ARRAY_LDR_OFFSET 2727#error "Array and field introspection code sharing requires same LDR offset." 2728#endif 2729.macro INTROSPECTION_ARRAY_LOAD index_reg 2730 ldr wIP0, [xIP0, \index_reg, lsl #2] 2731 b art_quick_read_barrier_mark_introspection 2732.endm 2733 2734.macro MOV_WIP0_TO_WREG_AND_BL_LR reg 2735 mov \reg, wIP0 2736 br lr // Do not use RET as we do not enter the entrypoint with "BL". 2737.endm 2738 2739.macro READ_BARRIER_MARK_INTROSPECTION_SLOW_PATH ldr_offset 2740 /* 2741 * Allocate 44 stack slots * 8 = 352 bytes: 2742 * - 19 slots for core registers X0-15, X18-X19, LR 2743 * - 1 slot padding 2744 * - 24 slots for floating-point registers D0-D7 and D16-D31 2745 */ 2746 // Save all potentially live caller-save core registers. 2747 SAVE_TWO_REGS_INCREASE_FRAME x0, x1, 352 2748 SAVE_TWO_REGS x2, x3, 16 2749 SAVE_TWO_REGS x4, x5, 32 2750 SAVE_TWO_REGS x6, x7, 48 2751 SAVE_TWO_REGS x8, x9, 64 2752 SAVE_TWO_REGS x10, x11, 80 2753 SAVE_TWO_REGS x12, x13, 96 2754 SAVE_TWO_REGS x14, x15, 112 2755 SAVE_TWO_REGS x18, x19, 128 // Skip x16, x17, i.e. IP0, IP1. 2756 SAVE_REG xLR, 144 // Save return address, skip padding at 152. 2757 // Save all potentially live caller-save floating-point registers. 2758 stp d0, d1, [sp, #160] 2759 stp d2, d3, [sp, #176] 2760 stp d4, d5, [sp, #192] 2761 stp d6, d7, [sp, #208] 2762 stp d16, d17, [sp, #224] 2763 stp d18, d19, [sp, #240] 2764 stp d20, d21, [sp, #256] 2765 stp d22, d23, [sp, #272] 2766 stp d24, d25, [sp, #288] 2767 stp d26, d27, [sp, #304] 2768 stp d28, d29, [sp, #320] 2769 stp d30, d31, [sp, #336] 2770 2771 mov x0, xIP0 2772 bl artReadBarrierMark // artReadBarrierMark(obj) 2773 mov xIP0, x0 2774 2775 // Restore core regs, except x0 and x1 as the return register switch case 2776 // address calculation is smoother with an extra register. 2777 RESTORE_TWO_REGS x2, x3, 16 2778 RESTORE_TWO_REGS x4, x5, 32 2779 RESTORE_TWO_REGS x6, x7, 48 2780 RESTORE_TWO_REGS x8, x9, 64 2781 RESTORE_TWO_REGS x10, x11, 80 2782 RESTORE_TWO_REGS x12, x13, 96 2783 RESTORE_TWO_REGS x14, x15, 112 2784 RESTORE_TWO_REGS x18, x19, 128 // Skip x16, x17, i.e. IP0, IP1. 2785 RESTORE_REG xLR, 144 // Restore return address. 2786 // Restore caller-save floating-point registers. 2787 ldp d0, d1, [sp, #160] 2788 ldp d2, d3, [sp, #176] 2789 ldp d4, d5, [sp, #192] 2790 ldp d6, d7, [sp, #208] 2791 ldp d16, d17, [sp, #224] 2792 ldp d18, d19, [sp, #240] 2793 ldp d20, d21, [sp, #256] 2794 ldp d22, d23, [sp, #272] 2795 ldp d24, d25, [sp, #288] 2796 ldp d26, d27, [sp, #304] 2797 ldp d28, d29, [sp, #320] 2798 ldp d30, d31, [sp, #336] 2799 2800 ldr x0, [lr, #\ldr_offset] // Load the instruction. 2801 adr xIP1, .Lmark_introspection_return_switch 2802 bfi xIP1, x0, #3, #5 // Calculate switch case address. 2803 RESTORE_TWO_REGS_DECREASE_FRAME x0, x1, 352 2804 br xIP1 2805.endm 2806 2807 /* 2808 * Use introspection to load a reference from the same address as the LDR 2809 * instruction in generated code would load (unless loaded by the thunk, 2810 * see below), call ReadBarrier::Mark() with that reference if needed 2811 * and return it in the same register as the LDR instruction would load. 2812 * 2813 * The entrypoint is called through a thunk that differs across load kinds. 2814 * For field and array loads the LDR instruction in generated code follows 2815 * the branch to the thunk, i.e. the LDR is at [LR, #-4], and the thunk 2816 * knows the holder and performs the gray bit check, returning to the LDR 2817 * instruction if the object is not gray, so this entrypoint no longer 2818 * needs to know anything about the holder. For GC root loads, the LDR 2819 * instruction in generated code precedes the branch to the thunk (i.e. 2820 * the LDR is at [LR, #-8]) and the thunk does not do the gray bit check. 2821 * 2822 * For field accesses and array loads with a constant index the thunk loads 2823 * the reference into IP0 using introspection and calls the main entrypoint, 2824 * art_quick_read_barrier_mark_introspection. With heap poisoning enabled, 2825 * the passed reference is poisoned. 2826 * 2827 * For array accesses with non-constant index, the thunk inserts the bits 2828 * 16-21 of the LDR instruction to the entrypoint address, effectively 2829 * calculating a switch case label based on the index register (bits 16-20) 2830 * and adding an extra offset (bit 21 is set) to differentiate from the 2831 * main entrypoint, then moves the base register to IP0 and jumps to the 2832 * switch case. Therefore we need to align the main entrypoint to 512 bytes, 2833 * accounting for a 256-byte offset followed by 32 array entrypoints 2834 * starting at art_quick_read_barrier_mark_introspection_arrays, each 2835 * containing an LDR (register) and a branch to the main entrypoint. 2836 * 2837 * For GC root accesses we cannot use the main entrypoint because of the 2838 * different offset where the LDR instruction in generated code is located. 2839 * (And even with heap poisoning enabled, GC roots are not poisoned.) 2840 * To re-use the same entrypoint pointer in generated code, we make sure 2841 * that the gc root entrypoint (a copy of the entrypoint with a different 2842 * offset for introspection loads) is located at a known offset (768 bytes, 2843 * or BAKER_MARK_INTROSPECTION_GC_ROOT_ENTRYPOINT_OFFSET) from the main 2844 * entrypoint and the GC root thunk adjusts the entrypoint pointer, moves 2845 * the root register to IP0 and jumps to the customized entrypoint, 2846 * art_quick_read_barrier_mark_introspection_gc_roots. The thunk also 2847 * performs all the fast-path checks, so we need just the slow path. 2848 * 2849 * The code structure is 2850 * art_quick_read_barrier_mark_introspection: 2851 * Up to 256 bytes for the main entrypoint code. 2852 * Padding to 256 bytes if needed. 2853 * art_quick_read_barrier_mark_introspection_arrays: 2854 * Exactly 256 bytes for array load switch cases (32x2 instructions). 2855 * .Lmark_introspection_return_switch: 2856 * Exactly 256 bytes for return switch cases (32x2 instructions). 2857 * art_quick_read_barrier_mark_introspection_gc_roots: 2858 * GC root entrypoint code. 2859 */ 2860 .balign 512 2861ENTRY art_quick_read_barrier_mark_introspection 2862 // At this point, IP0 contains the reference, IP1 can be freely used. 2863 // For heap poisoning, the reference is poisoned, so unpoison it first. 2864 UNPOISON_HEAP_REF wIP0 2865 // If reference is null, just return it in the right register. 2866 cbz wIP0, .Lmark_introspection_return 2867 // Use wIP1 as temp and check the mark bit of the reference. 2868 ldr wIP1, [xIP0, #MIRROR_OBJECT_LOCK_WORD_OFFSET] 2869 tbz wIP1, #LOCK_WORD_MARK_BIT_SHIFT, .Lmark_introspection_unmarked 2870.Lmark_introspection_return: 2871 // Without an extra register for the return switch case address calculation, 2872 // we exploit the high word of the xIP0 to temporarily store the ref_reg*8, 2873 // so the return switch below must move wIP0 instead of xIP0 to the register. 2874 ldr wIP1, [lr, #BAKER_MARK_INTROSPECTION_FIELD_LDR_OFFSET] // Load the instruction. 2875 bfi xIP0, xIP1, #(32 + 3), #5 // Extract ref_reg*8 to high word in xIP0. 2876 adr xIP1, .Lmark_introspection_return_switch 2877 bfxil xIP1, xIP0, #32, #8 // Calculate return switch case address. 2878 br xIP1 2879.Lmark_introspection_unmarked: 2880 // Check if the top two bits are one, if this is the case it is a forwarding address. 2881 tst wIP1, wIP1, lsl #1 2882 bmi .Lmark_introspection_forwarding_address 2883 READ_BARRIER_MARK_INTROSPECTION_SLOW_PATH BAKER_MARK_INTROSPECTION_FIELD_LDR_OFFSET 2884 2885.Lmark_introspection_forwarding_address: 2886 // Shift left by the forwarding address shift. This clears out the state bits since they are 2887 // in the top 2 bits of the lock word. 2888 lsl wIP0, wIP1, #LOCK_WORD_STATE_FORWARDING_ADDRESS_SHIFT 2889 b .Lmark_introspection_return 2890 2891 // We're very close to the alloted 256B for the entrypoint code before the 2892 // array switch cases. Should we go a little bit over the limit, we can 2893 // move some code after the array switch cases and return switch cases. 2894 .balign 256 2895 .hidden art_quick_read_barrier_mark_introspection_arrays 2896 .global art_quick_read_barrier_mark_introspection_arrays 2897art_quick_read_barrier_mark_introspection_arrays: 2898 FOR_XREGISTERS INTROSPECTION_ARRAY_LOAD, BRK0_BRK0 2899.Lmark_introspection_return_switch: 2900 FOR_WREGISTERS MOV_WIP0_TO_WREG_AND_BL_LR, BRK0_BRK0 2901 .hidden art_quick_read_barrier_mark_introspection_gc_roots 2902 .global art_quick_read_barrier_mark_introspection_gc_roots 2903art_quick_read_barrier_mark_introspection_gc_roots: 2904 READ_BARRIER_MARK_INTROSPECTION_SLOW_PATH BAKER_MARK_INTROSPECTION_GC_ROOT_LDR_OFFSET 2905END art_quick_read_barrier_mark_introspection 2906 2907.extern artInvokePolymorphic 2908ENTRY art_quick_invoke_polymorphic 2909 SETUP_SAVE_REFS_AND_ARGS_FRAME // Save callee saves in case allocation triggers GC. 2910 mov x2, xSELF 2911 mov x3, sp 2912 INCREASE_FRAME 16 // Reserve space for JValue result. 2913 str xzr, [sp, #0] // Initialize result to zero. 2914 mov x0, sp // Set r0 to point to result. 2915 bl artInvokePolymorphic // ArtInvokePolymorphic(result, receiver, thread, save_area) 2916 uxtb w0, w0 // Result is the return type descriptor as a char. 2917 sub w0, w0, 'A' // Convert to zero based index. 2918 cmp w0, 'Z' - 'A' 2919 bhi .Lcleanup_and_return // Clean-up if out-of-bounds. 2920 adrp x1, .Lhandler_table // Compute address of handler table. 2921 add x1, x1, :lo12:.Lhandler_table 2922 ldrb w0, [x1, w0, uxtw] // Lookup handler offset in handler table. 2923 adr x1, .Lstart_of_handlers 2924 add x0, x1, w0, sxtb #2 // Convert relative offset to absolute address. 2925 br x0 // Branch to handler. 2926 2927.Lstart_of_handlers: 2928.Lstore_boolean_result: 2929 ldrb w0, [sp] 2930 b .Lcleanup_and_return 2931.Lstore_char_result: 2932 ldrh w0, [sp] 2933 b .Lcleanup_and_return 2934.Lstore_float_result: 2935 ldr s0, [sp] 2936 str s0, [sp, #32] 2937 b .Lcleanup_and_return 2938.Lstore_double_result: 2939 ldr d0, [sp] 2940 str d0, [sp, #32] 2941 b .Lcleanup_and_return 2942.Lstore_long_result: 2943 ldr x0, [sp] 2944 // Fall-through 2945.Lcleanup_and_return: 2946 DECREASE_FRAME 16 2947 RESTORE_SAVE_REFS_AND_ARGS_FRAME 2948 REFRESH_MARKING_REGISTER 2949 RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 2950 2951 .section .rodata // Place handler table in read-only section away from text. 2952 .align 2 2953.macro HANDLER_TABLE_OFFSET handler_label 2954 .byte (\handler_label - .Lstart_of_handlers) / 4 2955.endm 2956.Lhandler_table: 2957 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // A 2958 HANDLER_TABLE_OFFSET(.Lstore_long_result) // B (byte) 2959 HANDLER_TABLE_OFFSET(.Lstore_char_result) // C (char) 2960 HANDLER_TABLE_OFFSET(.Lstore_double_result) // D (double) 2961 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // E 2962 HANDLER_TABLE_OFFSET(.Lstore_float_result) // F (float) 2963 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // G 2964 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // H 2965 HANDLER_TABLE_OFFSET(.Lstore_long_result) // I (int) 2966 HANDLER_TABLE_OFFSET(.Lstore_long_result) // J (long) 2967 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // K 2968 HANDLER_TABLE_OFFSET(.Lstore_long_result) // L (object - references are compressed and only 32-bits) 2969 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // M 2970 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // N 2971 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // O 2972 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // P 2973 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // Q 2974 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // R 2975 HANDLER_TABLE_OFFSET(.Lstore_long_result) // S (short) 2976 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // T 2977 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // U 2978 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // V (void) 2979 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // W 2980 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // X 2981 HANDLER_TABLE_OFFSET(.Lcleanup_and_return) // Y 2982 HANDLER_TABLE_OFFSET(.Lstore_boolean_result) // Z (boolean) 2983 .text 2984 2985END art_quick_invoke_polymorphic 2986