quick_entrypoints_arm64.S revision cf4035a4c41ccfcc3e89a0cee25f5218a11b0705
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 /* 23 * Macro that sets up the callee save frame to conform with 24 * Runtime::CreateCalleeSaveMethod(kSaveAll) 25 */ 26.macro SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 27 adrp x9, :got:_ZN3art7Runtime9instance_E 28 ldr x9, [x9, #:got_lo12:_ZN3art7Runtime9instance_E] 29 30 // Our registers aren't intermixed - just spill in order. 31 ldr x9,[x9] // x9 = & (art::Runtime * art::Runtime.instance_) . 32 33 // x9 = (ArtMethod*) Runtime.instance_.callee_save_methods[kRefAndArgs] . 34 ldr x9, [x9, RUNTIME_SAVE_ALL_CALLEE_SAVE_FRAME_OFFSET ] 35 36 sub sp, sp, #368 37 .cfi_adjust_cfa_offset 368 38 39 // Ugly compile-time check, but we only have the preprocessor. 40#if (FRAME_SIZE_SAVE_ALL_CALLEE_SAVE != 368) 41#error "SAVE_ALL_CALLEE_SAVE_FRAME(ARM64) size not as expected." 42#endif 43 44 // FP args 45 stp d0, d1, [sp, #8] 46 stp d2, d3, [sp, #24] 47 stp d4, d5, [sp, #40] 48 stp d6, d7, [sp, #56] 49 50 // FP callee-saves 51 stp d8, d9, [sp, #72] 52 stp d10, d11, [sp, #88] 53 stp d12, d13, [sp, #104] 54 stp d14, d15, [sp, #120] 55 56 stp d16, d17, [sp, #136] 57 stp d18, d19, [sp, #152] 58 stp d20, d21, [sp, #168] 59 stp d22, d23, [sp, #184] 60 stp d24, d25, [sp, #200] 61 stp d26, d27, [sp, #216] 62 stp d28, d29, [sp, #232] 63 stp d30, d31, [sp, #248] 64 65 66 // Callee saved. 67 stp xSELF, x19, [sp, #264] 68 .cfi_rel_offset x18, 264 69 .cfi_rel_offset x19, 272 70 71 stp x20, x21, [sp, #280] 72 .cfi_rel_offset x20, 280 73 .cfi_rel_offset x21, 288 74 75 stp x22, x23, [sp, #296] 76 .cfi_rel_offset x22, 296 77 .cfi_rel_offset x23, 304 78 79 stp x24, x25, [sp, #312] 80 .cfi_rel_offset x24, 312 81 .cfi_rel_offset x25, 320 82 83 stp x26, x27, [sp, #328] 84 .cfi_rel_offset x26, 328 85 .cfi_rel_offset x27, 336 86 87 stp x28, xFP, [sp, #344] // Save FP. 88 .cfi_rel_offset x28, 344 89 .cfi_rel_offset x29, 352 90 91 str xLR, [sp, #360] 92 .cfi_rel_offset x30, 360 93 94 // Loads appropriate callee-save-method 95 str x9, [sp] // Store ArtMethod* Runtime::callee_save_methods_[kRefsAndArgs] 96 97.endm 98 99 /* 100 * Macro that sets up the callee save frame to conform with 101 * Runtime::CreateCalleeSaveMethod(kRefsOnly). 102 */ 103// WIP. 104.macro SETUP_REF_ONLY_CALLEE_SAVE_FRAME 105 adrp x9, :got:_ZN3art7Runtime9instance_E 106 ldr x9, [x9, #:got_lo12:_ZN3art7Runtime9instance_E] 107 108 // Our registers aren't intermixed - just spill in order. 109 ldr x9,[x9] // x9 = & (art::Runtime * art::Runtime.instance_) . 110 111 // x9 = (ArtMethod*) Runtime.instance_.callee_save_methods[kRefAndArgs] . 112 ldr x9, [x9, RUNTIME_REFS_ONLY_CALLEE_SAVE_FRAME_OFFSET ] 113 114 sub sp, sp, #176 115 .cfi_adjust_cfa_offset 176 116 117 // Ugly compile-time check, but we only have the preprocessor. 118#if (FRAME_SIZE_REFS_ONLY_CALLEE_SAVE != 176) 119#error "REFS_ONLY_CALLEE_SAVE_FRAME(ARM64) size not as expected." 120#endif 121 122 // FP callee-saves 123 stp d8, d9, [sp, #8] 124 stp d10, d11, [sp, #24] 125 stp d12, d13, [sp, #40] 126 stp d14, d15, [sp, #56] 127 128 // Callee saved. 129 stp xSELF, x19, [sp, #72] 130 .cfi_rel_offset x18, 72 131 .cfi_rel_offset x19, 80 132 133 stp x20, x21, [sp, #88] 134 .cfi_rel_offset x20, 88 135 .cfi_rel_offset x21, 96 136 137 stp x22, x23, [sp, #104] 138 .cfi_rel_offset x22, 104 139 .cfi_rel_offset x23, 112 140 141 stp x24, x25, [sp, #120] 142 .cfi_rel_offset x24, 120 143 .cfi_rel_offset x25, 128 144 145 stp x26, x27, [sp, #136] 146 .cfi_rel_offset x26, 136 147 .cfi_rel_offset x27, 144 148 149 stp x28, xFP, [sp, #152] // Save FP. 150 .cfi_rel_offset x28, 152 151 .cfi_rel_offset x29, 160 152 153 str xLR, [sp, #168] 154 .cfi_rel_offset x30, 168 155 156 // Loads appropriate callee-save-method 157 str x9, [sp] // Store ArtMethod* Runtime::callee_save_methods_[kRefsAndArgs] 158.endm 159 160.macro RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 161 // FP callee saves 162 ldp d8, d9, [sp, #8] 163 ldp d10, d11, [sp, #24] 164 ldp d12, d13, [sp, #40] 165 ldp d14, d15, [sp, #56] 166 167 // Callee saved. 168 ldp xSELF, x19, [sp, #72] 169 .cfi_restore x18 170 .cfi_restore x19 171 172 ldp x20, x21, [sp, #88] 173 .cfi_restore x20 174 .cfi_restore x21 175 176 ldp x22, x23, [sp, #104] 177 .cfi_restore x22 178 .cfi_restore x23 179 180 ldp x24, x25, [sp, #120] 181 .cfi_restore x24 182 .cfi_restore x25 183 184 ldp x26, x27, [sp, #136] 185 .cfi_restore x26 186 .cfi_restore x27 187 188 ldp x28, xFP, [sp, #152] // Save FP. 189 .cfi_restore x28 190 .cfi_restore x29 191 192 ldr xLR, [sp, #168] 193 .cfi_restore x30 194 195 add sp, sp, #176 196 .cfi_adjust_cfa_offset -176 197.endm 198 199.macro RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN 200 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 201 ret 202.endm 203 204 205.macro SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 206 sub sp, sp, #304 207 .cfi_adjust_cfa_offset 304 208 209 // Ugly compile-time check, but we only have the preprocessor. 210#if (FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE != 304) 211#error "REFS_AND_ARGS_CALLEE_SAVE_FRAME(ARM64) size not as expected." 212#endif 213 214 stp d0, d1, [sp, #16] 215 stp d2, d3, [sp, #32] 216 stp d4, d5, [sp, #48] 217 stp d6, d7, [sp, #64] 218 stp d8, d9, [sp, #80] 219 stp d10, d11, [sp, #96] 220 stp d12, d13, [sp, #112] 221 stp d14, d15, [sp, #128] 222 223 stp x1, x2, [sp, #144] 224 .cfi_rel_offset x1, 144 225 .cfi_rel_offset x2, 152 226 227 stp x3, x4, [sp, #160] 228 .cfi_rel_offset x3, 160 229 .cfi_rel_offset x4, 168 230 231 stp x5, x6, [sp, #176] 232 .cfi_rel_offset x5, 176 233 .cfi_rel_offset x6, 184 234 235 stp x7, xSELF, [sp, #192] 236 .cfi_rel_offset x7, 192 237 .cfi_rel_offset x18, 200 238 239 stp x19, x20, [sp, #208] 240 .cfi_rel_offset x19, 208 241 .cfi_rel_offset x20, 216 242 243 stp x21, x22, [sp, #224] 244 .cfi_rel_offset x21, 224 245 .cfi_rel_offset x22, 232 246 247 stp x23, x24, [sp, #240] 248 .cfi_rel_offset x23, 240 249 .cfi_rel_offset x24, 248 250 251 stp x25, x26, [sp, #256] 252 .cfi_rel_offset x25, 256 253 .cfi_rel_offset x26, 264 254 255 stp x27, x28, [sp, #272] 256 .cfi_rel_offset x27, 272 257 .cfi_rel_offset x28, 280 258 259 stp xFP, xLR, [sp, #288] 260 .cfi_rel_offset x29, 288 261 .cfi_rel_offset x30, 296 262.endm 263 264 /* 265 * Macro that sets up the callee save frame to conform with 266 * Runtime::CreateCalleeSaveMethod(kRefsAndArgs). 267 * 268 * TODO This is probably too conservative - saving FP & LR. 269 */ 270.macro SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 271 adrp x9, :got:_ZN3art7Runtime9instance_E 272 ldr x9, [x9, #:got_lo12:_ZN3art7Runtime9instance_E] 273 274 // Our registers aren't intermixed - just spill in order. 275 ldr x9,[x9] // x9 = & (art::Runtime * art::Runtime.instance_) . 276 277 // x9 = (ArtMethod*) Runtime.instance_.callee_save_methods[kRefAndArgs] . 278 ldr x9, [x9, RUNTIME_REF_AND_ARGS_CALLEE_SAVE_FRAME_OFFSET ] 279 280 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 281 282 str x9, [sp] // Store ArtMethod* Runtime::callee_save_methods_[kRefsAndArgs] 283.endm 284 285.macro RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 286 287 ldp d0, d1, [sp, #16] 288 ldp d2, d3, [sp, #32] 289 ldp d4, d5, [sp, #48] 290 ldp d6, d7, [sp, #64] 291 ldp d8, d9, [sp, #80] 292 ldp d10, d11, [sp, #96] 293 ldp d12, d13, [sp, #112] 294 ldp d14, d15, [sp, #128] 295 296 // args. 297 ldp x1, x2, [sp, #144] 298 .cfi_restore x1 299 .cfi_restore x2 300 301 ldp x3, x4, [sp, #160] 302 .cfi_restore x3 303 .cfi_restore x4 304 305 ldp x5, x6, [sp, #176] 306 .cfi_restore x5 307 .cfi_restore x6 308 309 ldp x7, xSELF, [sp, #192] 310 .cfi_restore x7 311 .cfi_restore x18 312 313 ldp x19, x20, [sp, #208] 314 .cfi_restore x19 315 .cfi_restore x20 316 317 ldp x21, x22, [sp, #224] 318 .cfi_restore x21 319 .cfi_restore x22 320 321 ldp x23, x24, [sp, #240] 322 .cfi_restore x23 323 .cfi_restore x24 324 325 ldp x25, x26, [sp, #256] 326 .cfi_restore x25 327 .cfi_restore x26 328 329 ldp x27, x28, [sp, #272] 330 .cfi_restore x27 331 .cfi_restore x28 332 333 ldp xFP, xLR, [sp, #288] 334 .cfi_restore x29 335 .cfi_restore x30 336 337 add sp, sp, #304 338 .cfi_adjust_cfa_offset -304 339.endm 340 341.macro RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME_NO_D0 342 343 ldr d1, [sp, #24] 344 ldp d2, d3, [sp, #32] 345 ldp d4, d5, [sp, #48] 346 ldp d6, d7, [sp, #64] 347 ldp d8, d9, [sp, #80] 348 ldp d10, d11, [sp, #96] 349 ldp d12, d13, [sp, #112] 350 ldp d14, d15, [sp, #128] 351 352 // args. 353 ldp x1, x2, [sp, #144] 354 .cfi_restore x1 355 .cfi_restore x2 356 357 ldp x3, x4, [sp, #160] 358 .cfi_restore x3 359 .cfi_restore x4 360 361 ldp x5, x6, [sp, #176] 362 .cfi_restore x5 363 .cfi_restore x6 364 365 ldp x7, xSELF, [sp, #192] 366 .cfi_restore x7 367 .cfi_restore x18 368 369 ldp x19, x20, [sp, #208] 370 .cfi_restore x19 371 .cfi_restore x20 372 373 ldp x21, x22, [sp, #224] 374 .cfi_restore x21 375 .cfi_restore x22 376 377 ldp x23, x24, [sp, #240] 378 .cfi_restore x23 379 .cfi_restore x24 380 381 ldp x25, x26, [sp, #256] 382 .cfi_restore x25 383 .cfi_restore x26 384 385 ldp x27, x28, [sp, #272] 386 .cfi_restore x27 387 .cfi_restore x28 388 389 ldp xFP, xLR, [sp, #288] 390 .cfi_restore x29 391 .cfi_restore x30 392 393 add sp, sp, #304 394 .cfi_adjust_cfa_offset -304 395.endm 396 397.macro RETURN_IF_RESULT_IS_ZERO 398 cbnz x0, 1f // result non-zero branch over 399 ret // return 4001: 401.endm 402 403.macro RETURN_IF_RESULT_IS_NON_ZERO 404 cbz x0, 1f // result zero branch over 405 ret // return 4061: 407.endm 408 409 /* 410 * Macro that set calls through to artDeliverPendingExceptionFromCode, where the pending 411 * exception is Thread::Current()->exception_ 412 */ 413.macro DELIVER_PENDING_EXCEPTION 414 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 415 mov x0, xSELF 416 mov x1, sp 417 418 // Point of no return. 419 b artDeliverPendingExceptionFromCode // artDeliverPendingExceptionFromCode(Thread*, SP) 420 brk 0 // Unreached 421.endm 422 423.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_REG reg 424 ldr \reg, [xSELF, # THREAD_EXCEPTION_OFFSET] // Get exception field. 425 cbnz \reg, 1f 426 ret 4271: 428 DELIVER_PENDING_EXCEPTION 429.endm 430 431.macro RETURN_OR_DELIVER_PENDING_EXCEPTION 432 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG x9 433.endm 434 435// Same as above with x1. This is helpful in stubs that want to avoid clobbering another register. 436.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 437 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG x1 438.endm 439 440.macro RETURN_IF_W0_IS_ZERO_OR_DELIVER 441 cbnz w0, 1f // result non-zero branch over 442 ret // return 4431: 444 DELIVER_PENDING_EXCEPTION 445.endm 446 447.macro NO_ARG_RUNTIME_EXCEPTION c_name, cxx_name 448 .extern \cxx_name 449ENTRY \c_name 450 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 451 mov x0, xSELF // pass Thread::Current 452 mov x1, sp // pass SP 453 b \cxx_name // \cxx_name(Thread*, SP) 454END \c_name 455.endm 456 457.macro ONE_ARG_RUNTIME_EXCEPTION c_name, cxx_name 458 .extern \cxx_name 459ENTRY \c_name 460 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context. 461 mov x1, xSELF // pass Thread::Current. 462 mov x2, sp // pass SP. 463 b \cxx_name // \cxx_name(arg, Thread*, SP). 464 brk 0 465END \c_name 466.endm 467 468.macro TWO_ARG_RUNTIME_EXCEPTION c_name, cxx_name 469 .extern \cxx_name 470ENTRY \c_name 471 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 472 mov x2, xSELF // pass Thread::Current 473 mov x3, sp // pass SP 474 b \cxx_name // \cxx_name(arg1, arg2, Thread*, SP) 475 brk 0 476END \c_name 477.endm 478 479 /* 480 * Called by managed code, saves callee saves and then calls artThrowException 481 * that will place a mock Method* at the bottom of the stack. Arg1 holds the exception. 482 */ 483ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode 484 485 /* 486 * Called by managed code to create and deliver a NullPointerException. 487 */ 488NO_ARG_RUNTIME_EXCEPTION art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode 489 490 /* 491 * Called by managed code to create and deliver an ArithmeticException. 492 */ 493NO_ARG_RUNTIME_EXCEPTION art_quick_throw_div_zero, artThrowDivZeroFromCode 494 495 /* 496 * Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds 497 * index, arg2 holds limit. 498 */ 499TWO_ARG_RUNTIME_EXCEPTION art_quick_throw_array_bounds, artThrowArrayBoundsFromCode 500 501 /* 502 * Called by managed code to create and deliver a StackOverflowError. 503 */ 504NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode 505 506 /* 507 * Called by managed code to create and deliver a NoSuchMethodError. 508 */ 509ONE_ARG_RUNTIME_EXCEPTION art_quick_throw_no_such_method, artThrowNoSuchMethodFromCode 510 511 /* 512 * All generated callsites for interface invokes and invocation slow paths will load arguments 513 * as usual - except instead of loading arg0/x0 with the target Method*, arg0/x0 will contain 514 * the method_idx. This wrapper will save arg1-arg3, load the caller's Method*, align the 515 * stack and call the appropriate C helper. 516 * NOTE: "this" is first visible argument of the target, and so can be found in arg1/x1. 517 * 518 * The helper will attempt to locate the target and return a 128-bit result in x0/x1 consisting 519 * of the target Method* in x0 and method->code_ in x1. 520 * 521 * If unsuccessful, the helper will return NULL/????. There will be a pending exception in the 522 * thread and we branch to another stub to deliver it. 523 * 524 * On success this wrapper will restore arguments and *jump* to the target, leaving the lr 525 * pointing back to the original caller. 526 * 527 * Adapted from ARM32 code. 528 * 529 * Clobbers x12. 530 */ 531.macro INVOKE_TRAMPOLINE c_name, cxx_name 532 .extern \cxx_name 533ENTRY \c_name 534 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // save callee saves in case allocation triggers GC 535 // Helper signature is always 536 // (method_idx, *this_object, *caller_method, *self, sp) 537 538 ldr x2, [sp, #FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE] // pass caller Method* 539 mov x3, xSELF // pass Thread::Current 540 mov x4, sp 541 bl \cxx_name // (method_idx, this, caller, Thread*, SP) 542 mov x12, x1 // save Method*->code_ 543 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 544 cbz x0, 1f // did we find the target? if not go to exception delivery 545 br x12 // tail call to target 5461: 547 DELIVER_PENDING_EXCEPTION 548END \c_name 549.endm 550 551INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline, artInvokeInterfaceTrampoline 552INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck 553 554INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck 555INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck 556INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck 557INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck 558 559 560.macro INVOKE_STUB_CREATE_FRAME 561 562SAVE_SIZE=6*8 // x4, x5, x19(wSUSPEND), SP, LR & FP saved. 563SAVE_SIZE_AND_METHOD=SAVE_SIZE+STACK_REFERENCE_SIZE 564 565 566 mov x9, sp // Save stack pointer. 567 .cfi_register sp,x9 568 569 add x10, x2, # SAVE_SIZE_AND_METHOD // calculate size of frame. 570 sub x10, sp, x10 // Calculate SP position - saves + ArtMethod* + args 571 and x10, x10, # ~0xf // Enforce 16 byte stack alignment. 572 mov sp, x10 // Set new SP. 573 574 sub x10, x9, #SAVE_SIZE // Calculate new FP (later). Done here as we must move SP 575 .cfi_def_cfa_register x10 // before this. 576 .cfi_adjust_cfa_offset SAVE_SIZE 577 578 stp x9, x19, [x10, #32] // Save old stack pointer and x19(wSUSPEND) 579 .cfi_rel_offset sp, 32 580 .cfi_rel_offset x19, 40 581 582 stp x4, x5, [x10, #16] // Save result and shorty addresses. 583 .cfi_rel_offset x4, 16 584 .cfi_rel_offset x5, 24 585 586 stp xFP, xLR, [x10] // Store LR & FP. 587 .cfi_rel_offset x29, 0 588 .cfi_rel_offset x30, 8 589 590 mov xFP, x10 // Use xFP now, as it's callee-saved. 591 .cfi_def_cfa_register x29 592 mov xSELF, x3 // Move thread pointer into SELF register. 593 mov wSUSPEND, #SUSPEND_CHECK_INTERVAL // reset wSUSPEND to suspend check interval 594 595 // Copy arguments into stack frame. 596 // Use simple copy routine for now. 597 // 4 bytes per slot. 598 // X1 - source address 599 // W2 - args length 600 // X9 - destination address. 601 // W10 - temporary 602 add x9, sp, #4 // Destination address is bottom of stack + NULL. 603 604 // Use \@ to differentiate between macro invocations. 605.LcopyParams\@: 606 cmp w2, #0 607 beq .LendCopyParams\@ 608 sub w2, w2, #4 // Need 65536 bytes of range. 609 ldr w10, [x1, x2] 610 str w10, [x9, x2] 611 612 b .LcopyParams\@ 613 614.LendCopyParams\@: 615 616 // Store NULL into StackReference<Method>* at bottom of frame. 617 str wzr, [sp] 618 619#if (STACK_REFERENCE_SIZE != 4) 620#error "STACK_REFERENCE_SIZE(ARM64) size not as expected." 621#endif 622.endm 623 624.macro INVOKE_STUB_CALL_AND_RETURN 625 626 // load method-> METHOD_QUICK_CODE_OFFSET 627 ldr x9, [x0 , #METHOD_QUICK_CODE_OFFSET] 628 // Branch to method. 629 blr x9 630 631 // Restore return value address and shorty address. 632 ldp x4,x5, [xFP, #16] 633 .cfi_restore x4 634 .cfi_restore x5 635 636 // Store result (w0/x0/s0/d0) appropriately, depending on resultType. 637 ldrb w10, [x5] 638 639 // Don't set anything for a void type. 640 cmp w10, #'V' 641 beq .Lexit_art_quick_invoke_stub\@ 642 643 cmp w10, #'D' 644 bne .Lreturn_is_float\@ 645 str d0, [x4] 646 b .Lexit_art_quick_invoke_stub\@ 647 648.Lreturn_is_float\@: 649 cmp w10, #'F' 650 bne .Lreturn_is_int\@ 651 str s0, [x4] 652 b .Lexit_art_quick_invoke_stub\@ 653 654 // Just store x0. Doesn't matter if it is 64 or 32 bits. 655.Lreturn_is_int\@: 656 str x0, [x4] 657 658.Lexit_art_quick_invoke_stub\@: 659 ldp x2, x19, [x29, #32] // Restore stack pointer and x19. 660 .cfi_restore x19 661 mov sp, x2 662 .cfi_restore sp 663 664 ldp x29, x30, [x29] // Restore old frame pointer and link register. 665 .cfi_restore x29 666 .cfi_restore x30 667 668 ret 669 670.endm 671 672 673/* 674 * extern"C" void art_quick_invoke_stub(ArtMethod *method, x0 675 * uint32_t *args, x1 676 * uint32_t argsize, w2 677 * Thread *self, x3 678 * JValue *result, x4 679 * char *shorty); x5 680 * +----------------------+ 681 * | | 682 * | C/C++ frame | 683 * | LR'' | 684 * | FP'' | <- SP' 685 * +----------------------+ 686 * +----------------------+ 687 * | SP' | 688 * | X5 | 689 * | X4 | Saved registers 690 * | LR' | 691 * | FP' | <- FP 692 * +----------------------+ 693 * | uint32_t out[n-1] | 694 * | : : | Outs 695 * | uint32_t out[0] | 696 * | StackRef<ArtMethod> | <- SP value=null 697 * +----------------------+ 698 * 699 * Outgoing registers: 700 * x0 - Method* 701 * x1-x7 - integer parameters. 702 * d0-d7 - Floating point parameters. 703 * xSELF = self 704 * wSUSPEND = suspend count 705 * SP = & of ArtMethod* 706 * x1 = "this" pointer. 707 * 708 */ 709ENTRY art_quick_invoke_stub 710 // Spill registers as per AACPS64 calling convention. 711 INVOKE_STUB_CREATE_FRAME 712 713 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 714 // Parse the passed shorty to determine which register to load. 715 // Load addresses for routines that load WXSD registers. 716 adr x11, .LstoreW2 717 adr x12, .LstoreX2 718 adr x13, .LstoreS0 719 adr x14, .LstoreD0 720 721 // Initialize routine offsets to 0 for integers and floats. 722 // x8 for integers, x15 for floating point. 723 mov x8, #0 724 mov x15, #0 725 726 add x10, x5, #1 // Load shorty address, plus one to skip return value. 727 ldr w1, [x9],#4 // Load "this" parameter, and increment arg pointer. 728 729 // Loop to fill registers. 730.LfillRegisters: 731 ldrb w17, [x10], #1 // Load next character in signature, and increment. 732 cbz w17, .LcallFunction // Exit at end of signature. Shorty 0 terminated. 733 734 cmp w17, #'F' // is this a float? 735 bne .LisDouble 736 737 cmp x15, # 8*12 // Skip this load if all registers full. 738 beq .Ladvance4 739 740 add x17, x13, x15 // Calculate subroutine to jump to. 741 br x17 742 743.LisDouble: 744 cmp w17, #'D' // is this a double? 745 bne .LisLong 746 747 cmp x15, # 8*12 // Skip this load if all registers full. 748 beq .Ladvance8 749 750 add x17, x14, x15 // Calculate subroutine to jump to. 751 br x17 752 753.LisLong: 754 cmp w17, #'J' // is this a long? 755 bne .LisOther 756 757 cmp x8, # 6*12 // Skip this load if all registers full. 758 beq .Ladvance8 759 760 add x17, x12, x8 // Calculate subroutine to jump to. 761 br x17 762 763.LisOther: // Everything else takes one vReg. 764 cmp x8, # 6*12 // Skip this load if all registers full. 765 beq .Ladvance4 766 767 add x17, x11, x8 // Calculate subroutine to jump to. 768 br x17 769 770.Ladvance4: 771 add x9, x9, #4 772 b .LfillRegisters 773 774.Ladvance8: 775 add x9, x9, #8 776 b .LfillRegisters 777 778// Macro for loading a parameter into a register. 779// counter - the register with offset into these tables 780// size - the size of the register - 4 or 8 bytes. 781// register - the name of the register to be loaded. 782.macro LOADREG counter size register return 783 ldr \register , [x9], #\size 784 add \counter, \counter, 12 785 b \return 786.endm 787 788// Store ints. 789.LstoreW2: 790 LOADREG x8 4 w2 .LfillRegisters 791 LOADREG x8 4 w3 .LfillRegisters 792 LOADREG x8 4 w4 .LfillRegisters 793 LOADREG x8 4 w5 .LfillRegisters 794 LOADREG x8 4 w6 .LfillRegisters 795 LOADREG x8 4 w7 .LfillRegisters 796 797// Store longs. 798.LstoreX2: 799 LOADREG x8 8 x2 .LfillRegisters 800 LOADREG x8 8 x3 .LfillRegisters 801 LOADREG x8 8 x4 .LfillRegisters 802 LOADREG x8 8 x5 .LfillRegisters 803 LOADREG x8 8 x6 .LfillRegisters 804 LOADREG x8 8 x7 .LfillRegisters 805 806// Store singles. 807.LstoreS0: 808 LOADREG x15 4 s0 .LfillRegisters 809 LOADREG x15 4 s1 .LfillRegisters 810 LOADREG x15 4 s2 .LfillRegisters 811 LOADREG x15 4 s3 .LfillRegisters 812 LOADREG x15 4 s4 .LfillRegisters 813 LOADREG x15 4 s5 .LfillRegisters 814 LOADREG x15 4 s6 .LfillRegisters 815 LOADREG x15 4 s7 .LfillRegisters 816 817// Store doubles. 818.LstoreD0: 819 LOADREG x15 8 d0 .LfillRegisters 820 LOADREG x15 8 d1 .LfillRegisters 821 LOADREG x15 8 d2 .LfillRegisters 822 LOADREG x15 8 d3 .LfillRegisters 823 LOADREG x15 8 d4 .LfillRegisters 824 LOADREG x15 8 d5 .LfillRegisters 825 LOADREG x15 8 d6 .LfillRegisters 826 LOADREG x15 8 d7 .LfillRegisters 827 828 829.LcallFunction: 830 831 INVOKE_STUB_CALL_AND_RETURN 832 833END art_quick_invoke_stub 834 835/* extern"C" 836 * void art_quick_invoke_static_stub(ArtMethod *method, x0 837 * uint32_t *args, x1 838 * uint32_t argsize, w2 839 * Thread *self, x3 840 * JValue *result, x4 841 * char *shorty); x5 842 */ 843ENTRY art_quick_invoke_static_stub 844 // Spill registers as per AACPS64 calling convention. 845 INVOKE_STUB_CREATE_FRAME 846 847 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 848 // Parse the passed shorty to determine which register to load. 849 // Load addresses for routines that load WXSD registers. 850 adr x11, .LstoreW1_2 851 adr x12, .LstoreX1_2 852 adr x13, .LstoreS0_2 853 adr x14, .LstoreD0_2 854 855 // Initialize routine offsets to 0 for integers and floats. 856 // x8 for integers, x15 for floating point. 857 mov x8, #0 858 mov x15, #0 859 860 add x10, x5, #1 // Load shorty address, plus one to skip return value. 861 862 // Loop to fill registers. 863.LfillRegisters2: 864 ldrb w17, [x10], #1 // Load next character in signature, and increment. 865 cbz w17, .LcallFunction2 // Exit at end of signature. Shorty 0 terminated. 866 867 cmp w17, #'F' // is this a float? 868 bne .LisDouble2 869 870 cmp x15, # 8*12 // Skip this load if all registers full. 871 beq .Ladvance4_2 872 873 add x17, x13, x15 // Calculate subroutine to jump to. 874 br x17 875 876.LisDouble2: 877 cmp w17, #'D' // is this a double? 878 bne .LisLong2 879 880 cmp x15, # 8*12 // Skip this load if all registers full. 881 beq .Ladvance8_2 882 883 add x17, x14, x15 // Calculate subroutine to jump to. 884 br x17 885 886.LisLong2: 887 cmp w17, #'J' // is this a long? 888 bne .LisOther2 889 890 cmp x8, # 7*12 // Skip this load if all registers full. 891 beq .Ladvance8_2 892 893 add x17, x12, x8 // Calculate subroutine to jump to. 894 br x17 895 896.LisOther2: // Everything else takes one vReg. 897 cmp x8, # 7*12 // Skip this load if all registers full. 898 beq .Ladvance4_2 899 900 add x17, x11, x8 // Calculate subroutine to jump to. 901 br x17 902 903.Ladvance4_2: 904 add x9, x9, #4 905 b .LfillRegisters2 906 907.Ladvance8_2: 908 add x9, x9, #8 909 b .LfillRegisters2 910 911// Store ints. 912.LstoreW1_2: 913 LOADREG x8 4 w1 .LfillRegisters2 914 LOADREG x8 4 w2 .LfillRegisters2 915 LOADREG x8 4 w3 .LfillRegisters2 916 LOADREG x8 4 w4 .LfillRegisters2 917 LOADREG x8 4 w5 .LfillRegisters2 918 LOADREG x8 4 w6 .LfillRegisters2 919 LOADREG x8 4 w7 .LfillRegisters2 920 921// Store longs. 922.LstoreX1_2: 923 LOADREG x8 8 x1 .LfillRegisters2 924 LOADREG x8 8 x2 .LfillRegisters2 925 LOADREG x8 8 x3 .LfillRegisters2 926 LOADREG x8 8 x4 .LfillRegisters2 927 LOADREG x8 8 x5 .LfillRegisters2 928 LOADREG x8 8 x6 .LfillRegisters2 929 LOADREG x8 8 x7 .LfillRegisters2 930 931// Store singles. 932.LstoreS0_2: 933 LOADREG x15 4 s0 .LfillRegisters2 934 LOADREG x15 4 s1 .LfillRegisters2 935 LOADREG x15 4 s2 .LfillRegisters2 936 LOADREG x15 4 s3 .LfillRegisters2 937 LOADREG x15 4 s4 .LfillRegisters2 938 LOADREG x15 4 s5 .LfillRegisters2 939 LOADREG x15 4 s6 .LfillRegisters2 940 LOADREG x15 4 s7 .LfillRegisters2 941 942// Store doubles. 943.LstoreD0_2: 944 LOADREG x15 8 d0 .LfillRegisters2 945 LOADREG x15 8 d1 .LfillRegisters2 946 LOADREG x15 8 d2 .LfillRegisters2 947 LOADREG x15 8 d3 .LfillRegisters2 948 LOADREG x15 8 d4 .LfillRegisters2 949 LOADREG x15 8 d5 .LfillRegisters2 950 LOADREG x15 8 d6 .LfillRegisters2 951 LOADREG x15 8 d7 .LfillRegisters2 952 953 954.LcallFunction2: 955 956 INVOKE_STUB_CALL_AND_RETURN 957 958END art_quick_invoke_static_stub 959 960 961 962 /* 963 * On entry x0 is uintptr_t* gprs_ and x1 is uint64_t* fprs_ 964 */ 965 966ENTRY art_quick_do_long_jump 967 // Load FPRs 968 ldp d0, d1, [x1], #16 969 ldp d2, d3, [x1], #16 970 ldp d4, d5, [x1], #16 971 ldp d6, d7, [x1], #16 972 ldp d8, d9, [x1], #16 973 ldp d10, d11, [x1], #16 974 ldp d12, d13, [x1], #16 975 ldp d14, d15, [x1], #16 976 ldp d16, d17, [x1], #16 977 ldp d18, d19, [x1], #16 978 ldp d20, d21, [x1], #16 979 ldp d22, d23, [x1], #16 980 ldp d24, d25, [x1], #16 981 ldp d26, d27, [x1], #16 982 ldp d28, d29, [x1], #16 983 ldp d30, d31, [x1] 984 985 // Load GPRs 986 // TODO: lots of those are smashed, could optimize. 987 add x0, x0, #30*8 988 ldp x30, x1, [x0], #-16 989 ldp x28, x29, [x0], #-16 990 ldp x26, x27, [x0], #-16 991 ldp x24, x25, [x0], #-16 992 ldp x22, x23, [x0], #-16 993 ldp x20, x21, [x0], #-16 994 ldp x18, x19, [x0], #-16 995 ldp x16, x17, [x0], #-16 996 ldp x14, x15, [x0], #-16 997 ldp x12, x13, [x0], #-16 998 ldp x10, x11, [x0], #-16 999 ldp x8, x9, [x0], #-16 1000 ldp x6, x7, [x0], #-16 1001 ldp x4, x5, [x0], #-16 1002 ldp x2, x3, [x0], #-16 1003 mov sp, x1 1004 1005 // TODO: Is it really OK to use LR for the target PC? 1006 mov x0, #0 1007 mov x1, #0 1008 br xLR 1009END art_quick_do_long_jump 1010 1011 /* 1012 * Entry from managed code that calls artHandleFillArrayDataFromCode and delivers exception on 1013 * failure. 1014 */ 1015 .extern artHandleFillArrayDataFromCode 1016ENTRY art_quick_handle_fill_data 1017 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // Save callee saves in case exception allocation triggers GC. 1018 mov x2, xSELF // Pass Thread::Current. 1019 mov x3, sp // Pass SP. 1020 bl artHandleFillArrayDataFromCode // (Array*, const DexFile::Payload*, Thread*, SP) 1021 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1022 RETURN_IF_RESULT_IS_ZERO 1023 DELIVER_PENDING_EXCEPTION 1024END art_quick_handle_fill_data 1025 1026 /* 1027 * Entry from managed code that calls artLockObjectFromCode, may block for GC. x0 holds the 1028 * possibly null object to lock. 1029 * 1030 * Derived from arm32 code. 1031 */ 1032 .extern artLockObjectFromCode 1033ENTRY art_quick_lock_object 1034 cbz w0, .Lslow_lock 1035 add x4, x0, #LOCK_WORD_OFFSET // exclusive load/store had no immediate anymore 1036.Lretry_lock: 1037 ldr w2, [xSELF, #THREAD_ID_OFFSET] // TODO: Can the thread ID really change during the loop? 1038 ldxr w1, [x4] 1039 cbnz w1, .Lnot_unlocked // already thin locked 1040 stxr w3, w2, [x4] 1041 cbnz w3, .Lstrex_fail // store failed, retry 1042 dmb ishld // full (LoadLoad|LoadStore) memory barrier 1043 ret 1044.Lstrex_fail: 1045 b .Lretry_lock // unlikely forward branch, need to reload and recheck r1/r2 1046.Lnot_unlocked: 1047 lsr w3, w1, 30 1048 cbnz w3, .Lslow_lock // if either of the top two bits are set, go slow path 1049 eor w2, w1, w2 // lock_word.ThreadId() ^ self->ThreadId() 1050 uxth w2, w2 // zero top 16 bits 1051 cbnz w2, .Lslow_lock // lock word and self thread id's match -> recursive lock 1052 // else contention, go to slow path 1053 add w2, w1, #65536 // increment count in lock word placing in w2 for storing 1054 lsr w1, w2, 30 // if either of the top two bits are set, we overflowed. 1055 cbnz w1, .Lslow_lock // if we overflow the count go slow path 1056 str w2, [x0, #LOCK_WORD_OFFSET]// no need for stxr as we hold the lock 1057 ret 1058.Lslow_lock: 1059 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case we block 1060 mov x1, xSELF // pass Thread::Current 1061 mov x2, sp // pass SP 1062 bl artLockObjectFromCode // (Object* obj, Thread*, SP) 1063 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1064 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1065END art_quick_lock_object 1066 1067 /* 1068 * Entry from managed code that calls artUnlockObjectFromCode and delivers exception on failure. 1069 * x0 holds the possibly null object to lock. 1070 * 1071 * Derived from arm32 code. 1072 */ 1073 .extern artUnlockObjectFromCode 1074ENTRY art_quick_unlock_object 1075 cbz x0, .Lslow_unlock 1076 ldr w1, [x0, #LOCK_WORD_OFFSET] 1077 lsr w2, w1, 30 1078 cbnz w2, .Lslow_unlock // if either of the top two bits are set, go slow path 1079 ldr w2, [xSELF, #THREAD_ID_OFFSET] 1080 eor w3, w1, w2 // lock_word.ThreadId() ^ self->ThreadId() 1081 uxth w3, w3 // zero top 16 bits 1082 cbnz w3, .Lslow_unlock // do lock word and self thread id's match? 1083 cmp w1, #65536 1084 bpl .Lrecursive_thin_unlock 1085 // transition to unlocked, w3 holds 0 1086 dmb ish // full (LoadStore|StoreStore) memory barrier 1087 str w3, [x0, #LOCK_WORD_OFFSET] 1088 ret 1089.Lrecursive_thin_unlock: 1090 sub w1, w1, #65536 1091 str w1, [x0, #LOCK_WORD_OFFSET] 1092 ret 1093.Lslow_unlock: 1094 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case exception allocation triggers GC 1095 mov x1, xSELF // pass Thread::Current 1096 mov x2, sp // pass SP 1097 bl artUnlockObjectFromCode // (Object* obj, Thread*, SP) 1098 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1099 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1100END art_quick_unlock_object 1101 1102 /* 1103 * Entry from managed code that calls artIsAssignableFromCode and on failure calls 1104 * artThrowClassCastException. 1105 */ 1106 .extern artThrowClassCastException 1107ENTRY art_quick_check_cast 1108 // Store arguments and link register 1109 sub sp, sp, #32 // Stack needs to be 16b aligned on calls 1110 .cfi_adjust_cfa_offset 32 1111 stp x0, x1, [sp] 1112 .cfi_rel_offset x0, 0 1113 .cfi_rel_offset x1, 8 1114 stp xSELF, xLR, [sp, #16] 1115 .cfi_rel_offset x18, 16 1116 .cfi_rel_offset x30, 24 1117 1118 // Call runtime code 1119 bl artIsAssignableFromCode 1120 1121 // Check for exception 1122 cbz x0, .Lthrow_class_cast_exception 1123 1124 // Restore and return 1125 ldp x0, x1, [sp] 1126 .cfi_restore x0 1127 .cfi_restore x1 1128 ldp xSELF, xLR, [sp, #16] 1129 .cfi_restore x18 1130 .cfi_restore x30 1131 add sp, sp, #32 1132 .cfi_adjust_cfa_offset -32 1133 ret 1134 1135.Lthrow_class_cast_exception: 1136 // Restore 1137 ldp x0, x1, [sp] 1138 .cfi_restore x0 1139 .cfi_restore x1 1140 ldp xSELF, xLR, [sp, #16] 1141 .cfi_restore x18 1142 .cfi_restore x30 1143 add sp, sp, #32 1144 .cfi_adjust_cfa_offset -32 1145 1146 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 1147 mov x2, xSELF // pass Thread::Current 1148 mov x3, sp // pass SP 1149 b artThrowClassCastException // (Class*, Class*, Thread*, SP) 1150 brk 0 // We should not return here... 1151END art_quick_check_cast 1152 1153 /* 1154 * Entry from managed code for array put operations of objects where the value being stored 1155 * needs to be checked for compatibility. 1156 * x0 = array, x1 = index, x2 = value 1157 * 1158 * Currently all values should fit into w0/w1/w2, and w1 always will as indices are 32b. We 1159 * assume, though, that the upper 32b are zeroed out. At least for x1/w1 we can do better by 1160 * using index-zero-extension in load/stores. 1161 * 1162 * Temporaries: x3, x4 1163 * TODO: x4 OK? ip seems wrong here. 1164 */ 1165ENTRY art_quick_aput_obj_with_null_and_bound_check 1166 tst x0, x0 1167 bne art_quick_aput_obj_with_bound_check 1168 b art_quick_throw_null_pointer_exception 1169END art_quick_aput_obj_with_null_and_bound_check 1170 1171ENTRY art_quick_aput_obj_with_bound_check 1172 ldr w3, [x0, #ARRAY_LENGTH_OFFSET] 1173 cmp w3, w1 1174 bhi art_quick_aput_obj 1175 mov x0, x1 1176 mov x1, x3 1177 b art_quick_throw_array_bounds 1178END art_quick_aput_obj_with_bound_check 1179 1180ENTRY art_quick_aput_obj 1181 cbz x2, .Ldo_aput_null 1182 ldr w3, [x0, #CLASS_OFFSET] // Heap reference = 32b 1183 // This also zero-extends to x3 1184 ldr w4, [x2, #CLASS_OFFSET] // Heap reference = 32b 1185 // This also zero-extends to x4 1186 ldr w3, [x3, #CLASS_COMPONENT_TYPE_OFFSET] // Heap reference = 32b 1187 // This also zero-extends to x3 1188 cmp w3, w4 // value's type == array's component type - trivial assignability 1189 bne .Lcheck_assignability 1190.Ldo_aput: 1191 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1192 // "Compress" = do nothing 1193 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1194 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1195 lsr x0, x0, #7 1196 strb w3, [x3, x0] 1197 ret 1198.Ldo_aput_null: 1199 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1200 // "Compress" = do nothing 1201 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1202 ret 1203.Lcheck_assignability: 1204 // Store arguments and link register 1205 sub sp, sp, #48 // Stack needs to be 16b aligned on calls 1206 .cfi_adjust_cfa_offset 48 1207 stp x0, x1, [sp] 1208 .cfi_rel_offset x0, 0 1209 .cfi_rel_offset x1, 8 1210 stp x2, xSELF, [sp, #16] 1211 .cfi_rel_offset x2, 16 1212 .cfi_rel_offset x18, 24 1213 str xLR, [sp, #32] 1214 .cfi_rel_offset x30, 32 1215 1216 // Call runtime code 1217 mov x0, x3 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1218 mov x1, x4 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1219 bl artIsAssignableFromCode 1220 1221 // Check for exception 1222 cbz x0, .Lthrow_array_store_exception 1223 1224 // Restore 1225 ldp x0, x1, [sp] 1226 .cfi_restore x0 1227 .cfi_restore x1 1228 ldp x2, xSELF, [sp, #16] 1229 .cfi_restore x2 1230 .cfi_restore x18 1231 ldr xLR, [sp, #32] 1232 .cfi_restore x30 1233 add sp, sp, #48 1234 .cfi_adjust_cfa_offset -48 1235 1236 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1237 // "Compress" = do nothing 1238 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1239 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1240 lsr x0, x0, #7 1241 strb w3, [x3, x0] 1242 ret 1243.Lthrow_array_store_exception: 1244 ldp x0, x1, [sp] 1245 .cfi_restore x0 1246 .cfi_restore x1 1247 ldp x2, xSELF, [sp, #16] 1248 .cfi_restore x2 1249 .cfi_restore x18 1250 ldr xLR, [sp, #32] 1251 .cfi_restore x30 1252 add sp, sp, #48 1253 .cfi_adjust_cfa_offset -48 1254 1255 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 1256 mov x1, x2 // Pass value. 1257 mov x2, xSELF // Pass Thread::Current. 1258 mov x3, sp // Pass SP. 1259 b artThrowArrayStoreException // (Object*, Object*, Thread*, SP). 1260 brk 0 // Unreached. 1261END art_quick_aput_obj 1262 1263// Macro to facilitate adding new allocation entrypoints. 1264.macro TWO_ARG_DOWNCALL name, entrypoint, return 1265 .extern \entrypoint 1266ENTRY \name 1267 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1268 mov x2, xSELF // pass Thread::Current 1269 mov x3, sp // pass SP 1270 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*, SP) 1271 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1272 \return 1273 DELIVER_PENDING_EXCEPTION 1274END \name 1275.endm 1276 1277// Macro to facilitate adding new array allocation entrypoints. 1278.macro THREE_ARG_DOWNCALL name, entrypoint, return 1279 .extern \entrypoint 1280ENTRY \name 1281 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1282 mov x3, xSELF // pass Thread::Current 1283 mov x4, sp // pass SP 1284 bl \entrypoint 1285 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1286 \return 1287 DELIVER_PENDING_EXCEPTION 1288END \name 1289.endm 1290 1291// Macros taking opportunity of code similarities for downcalls with referrer. 1292 1293// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1294.macro ONE_ARG_REF_DOWNCALL name, entrypoint, return 1295 .extern \entrypoint 1296ENTRY \name 1297 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1298 ldr w1, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1299 mov x2, xSELF // pass Thread::Current 1300 mov x3, sp // pass SP 1301 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*, SP) 1302 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1303 \return 1304END \name 1305.endm 1306 1307// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1308.macro TWO_ARG_REF_DOWNCALL name, entrypoint, return 1309 .extern \entrypoint 1310ENTRY \name 1311 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1312 ldr w2, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1313 mov x3, xSELF // pass Thread::Current 1314 mov x4, sp // pass SP 1315 bl \entrypoint 1316 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1317 \return 1318END \name 1319.endm 1320 1321// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1322.macro THREE_ARG_REF_DOWNCALL name, entrypoint, return 1323 .extern \entrypoint 1324ENTRY \name 1325 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1326 ldr w3, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1327 mov x4, xSELF // pass Thread::Current 1328 mov x5, sp // pass SP 1329 bl \entrypoint 1330 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1331 \return 1332END \name 1333.endm 1334 1335 /* 1336 * Entry from managed code when uninitialized static storage, this stub will run the class 1337 * initializer and deliver the exception on error. On success the static storage base is 1338 * returned. 1339 */ 1340TWO_ARG_DOWNCALL art_quick_initialize_static_storage, artInitializeStaticStorageFromCode, RETURN_IF_RESULT_IS_NON_ZERO 1341 1342UNIMPLEMENTED art_quick_initialize_type 1343UNIMPLEMENTED art_quick_initialize_type_and_verify_access 1344 1345ONE_ARG_REF_DOWNCALL art_quick_get32_static, artGet32StaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1346ONE_ARG_REF_DOWNCALL art_quick_get64_static, artGet64StaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1347ONE_ARG_REF_DOWNCALL art_quick_get_obj_static, artGetObjStaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1348 1349TWO_ARG_REF_DOWNCALL art_quick_get32_instance, artGet32InstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1350TWO_ARG_REF_DOWNCALL art_quick_get64_instance, artGet64InstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1351TWO_ARG_REF_DOWNCALL art_quick_get_obj_instance, artGetObjInstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1352 1353TWO_ARG_REF_DOWNCALL art_quick_set32_static, artSet32StaticFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1354TWO_ARG_REF_DOWNCALL art_quick_set_obj_static, artSetObjStaticFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1355 1356THREE_ARG_REF_DOWNCALL art_quick_set32_instance, artSet32InstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1357THREE_ARG_DOWNCALL art_quick_set64_instance, artSet64InstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1358THREE_ARG_REF_DOWNCALL art_quick_set_obj_instance, artSetObjInstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1359 1360// This is separated out as the argument order is different. 1361 .extern artSet64StaticFromCode 1362ENTRY art_quick_set64_static 1363 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1364 mov x3, x1 // Store value 1365 ldr w1, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1366 mov x2, x3 // Put value param 1367 mov x3, xSELF // pass Thread::Current 1368 mov x4, sp // pass SP 1369 bl artSet64StaticFromCode 1370 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1371 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1372END art_quick_set64_static 1373 1374 /* 1375 * Entry from managed code to resolve a string, this stub will allocate a String and deliver an 1376 * exception on error. On success the String is returned. x0 holds the referring method, 1377 * w1 holds the string index. The fast path check for hit in strings cache has already been 1378 * performed. 1379 */ 1380TWO_ARG_DOWNCALL art_quick_resolve_string, artResolveStringFromCode, RETURN_IF_RESULT_IS_NON_ZERO 1381 1382// Generate the allocation entrypoints for each allocator. 1383GENERATE_ALL_ALLOC_ENTRYPOINTS 1384 1385 /* 1386 * Called by managed code when the value in wSUSPEND has been decremented to 0. 1387 */ 1388 .extern artTestSuspendFromCode 1389ENTRY art_quick_test_suspend 1390 ldrh w0, [xSELF, #THREAD_FLAGS_OFFSET] // get xSELF->state_and_flags.as_struct.flags 1391 mov wSUSPEND, #SUSPEND_CHECK_INTERVAL // reset wSUSPEND to SUSPEND_CHECK_INTERVAL 1392 cbnz w0, .Lneed_suspend // check flags == 0 1393 ret // return if flags == 0 1394.Lneed_suspend: 1395 mov x0, xSELF 1396 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves for stack crawl 1397 mov x1, sp 1398 bl artTestSuspendFromCode // (Thread*, SP) 1399 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN 1400END art_quick_test_suspend 1401 1402 /* 1403 * Called by managed code that is attempting to call a method on a proxy class. On entry 1404 * x0 holds the proxy method and x1 holds the receiver; The frame size of the invoked proxy 1405 * method agrees with a ref and args callee save frame. 1406 */ 1407 .extern artQuickProxyInvokeHandler 1408ENTRY art_quick_proxy_invoke_handler 1409 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 1410 str x0, [sp, #0] // place proxy method at bottom of frame 1411 mov x2, xSELF // pass Thread::Current 1412 mov x3, sp // pass SP 1413 bl artQuickProxyInvokeHandler // (Method* proxy method, receiver, Thread*, SP) 1414 ldr xSELF, [sp, #200] // Restore self pointer. 1415 ldr x2, [xSELF, THREAD_EXCEPTION_OFFSET] 1416 cbnz x2, .Lexception_in_proxy // success if no exception is pending 1417 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME_NO_D0 // keep d0 1418 ret // return on success 1419.Lexception_in_proxy: 1420 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1421 DELIVER_PENDING_EXCEPTION 1422END art_quick_proxy_invoke_handler 1423 1424 /* 1425 * Called to resolve an imt conflict. x12 is a hidden argument that holds the target method's 1426 * dex method index. 1427 */ 1428ENTRY art_quick_imt_conflict_trampoline 1429 ldr w0, [sp, #0] // load caller Method* 1430 ldr w0, [x0, #METHOD_DEX_CACHE_METHODS_OFFSET] // load dex_cache_resolved_methods 1431 add x0, x0, #OBJECT_ARRAY_DATA_OFFSET // get starting address of data 1432 ldr w0, [x0, x12, lsl 2] // load the target method 1433 b art_quick_invoke_interface_trampoline 1434END art_quick_imt_conflict_trampoline 1435 1436ENTRY art_quick_resolution_trampoline 1437 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 1438 mov x2, xSELF 1439 mov x3, sp 1440 bl artQuickResolutionTrampoline // (called, receiver, Thread*, SP) 1441 cbz x0, 1f 1442 mov x9, x0 // Remember returned code pointer in x9. 1443 ldr w0, [sp, #0] // artQuickResolutionTrampoline puts called method in *SP. 1444 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1445 br x9 14461: 1447 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1448 DELIVER_PENDING_EXCEPTION 1449END art_quick_resolution_trampoline 1450 1451/* 1452 * Generic JNI frame layout: 1453 * 1454 * #-------------------# 1455 * | | 1456 * | caller method... | 1457 * #-------------------# <--- SP on entry 1458 * | Return X30/LR | 1459 * | X29/FP | callee save 1460 * | X28 | callee save 1461 * | X27 | callee save 1462 * | X26 | callee save 1463 * | X25 | callee save 1464 * | X24 | callee save 1465 * | X23 | callee save 1466 * | X22 | callee save 1467 * | X21 | callee save 1468 * | X20 | callee save 1469 * | X19 | callee save 1470 * | X7 | arg7 1471 * | X6 | arg6 1472 * | X5 | arg5 1473 * | X4 | arg4 1474 * | X3 | arg3 1475 * | X2 | arg2 1476 * | X1 | arg1 1477 * | D15 | float arg 8 1478 * | D14 | float arg 8 1479 * | D13 | float arg 8 1480 * | D12 | callee save 1481 * | D11 | callee save 1482 * | D10 | callee save 1483 * | D9 | callee save 1484 * | D8 | callee save 1485 * | D7 | float arg 8 1486 * | D6 | float arg 7 1487 * | D5 | float arg 6 1488 * | D4 | float arg 5 1489 * | D3 | float arg 4 1490 * | D2 | float arg 3 1491 * | D1 | float arg 2 1492 * | D0 | float arg 1 1493 * | Method* | <- X0 1494 * #-------------------# 1495 * | local ref cookie | // 4B 1496 * | handle scope size | // 4B 1497 * #-------------------# 1498 * | JNI Call Stack | 1499 * #-------------------# <--- SP on native call 1500 * | | 1501 * | Stack for Regs | The trampoline assembly will pop these values 1502 * | | into registers for native call 1503 * #-------------------# 1504 * | Native code ptr | 1505 * #-------------------# 1506 * | Free scratch | 1507 * #-------------------# 1508 * | Ptr to (1) | <--- SP 1509 * #-------------------# 1510 */ 1511 /* 1512 * Called to do a generic JNI down-call 1513 */ 1514ENTRY art_quick_generic_jni_trampoline 1515 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 1516 str x0, [sp, #0] // Store native ArtMethod* to bottom of stack. 1517 1518 // Save SP , so we can have static CFI info. 1519 mov x28, sp 1520 .cfi_def_cfa_register x28 1521 1522 // This looks the same, but is different: this will be updated to point to the bottom 1523 // of the frame when the handle scope is inserted. 1524 mov xFP, sp 1525 1526 mov x8, #5120 1527 sub sp, sp, x8 1528 1529 // prepare for artQuickGenericJniTrampoline call 1530 // (Thread*, SP) 1531 // x0 x1 <= C calling convention 1532 // xSELF xFP <= where they are 1533 1534 mov x0, xSELF // Thread* 1535 mov x1, xFP 1536 bl artQuickGenericJniTrampoline // (Thread*, sp) 1537 1538 // Get the updated pointer. This is the bottom of the frame _with_ handle scope. 1539 ldr xFP, [sp] 1540 add x9, sp, #8 1541 1542 cmp x0, #0 1543 b.mi .Lentry_error // Check for error, negative value. 1544 1545 // release part of the alloca. 1546 add x9, x9, x0 1547 1548 // Get the code pointer 1549 ldr xIP0, [x9, #0] 1550 1551 // Load parameters from frame into registers. 1552 // TODO Check with artQuickGenericJniTrampoline. 1553 // Also, check again APPCS64 - the stack arguments are interleaved. 1554 ldp x0, x1, [x9, #8] 1555 ldp x2, x3, [x9, #24] 1556 ldp x4, x5, [x9, #40] 1557 ldp x6, x7, [x9, #56] 1558 1559 ldp d0, d1, [x9, #72] 1560 ldp d2, d3, [x9, #88] 1561 ldp d4, d5, [x9, #104] 1562 ldp d6, d7, [x9, #120] 1563 1564 add sp, x9, #136 1565 1566 blr xIP0 // native call. 1567 1568 // Restore self pointer. 1569 ldr xSELF, [x28, #200] 1570 1571 // result sign extension is handled in C code 1572 // prepare for artQuickGenericJniEndTrampoline call 1573 // (Thread*, SP, result, result_f) 1574 // x0 x1 x2 x3 <= C calling convention 1575 mov x5, x0 // Save return value 1576 mov x0, xSELF // Thread register 1577 mov x1, xFP // Stack pointer 1578 mov x2, x5 // Result (from saved) 1579 fmov x3, d0 // d0 will contain floating point result, but needs to go into x3 1580 1581 bl artQuickGenericJniEndTrampoline 1582 1583 // Tear down the alloca. 1584 mov sp, x28 1585 .cfi_def_cfa_register sp 1586 1587 // Restore self pointer. 1588 ldr xSELF, [x28, #200] 1589 1590 // Pending exceptions possible. 1591 ldr x1, [xSELF, THREAD_EXCEPTION_OFFSET] 1592 cbnz x1, .Lexception_in_native 1593 1594 // Tear down the callee-save frame. 1595 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1596 1597 // store into fpr, for when it's a fpr return... 1598 fmov d0, x0 1599 ret 1600 1601.Lentry_error: 1602 mov sp, x28 1603 .cfi_def_cfa_register sp 1604 ldr xSELF, [x28, #200] 1605.Lexception_in_native: 1606 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1607 DELIVER_PENDING_EXCEPTION 1608 1609END art_quick_generic_jni_trampoline 1610 1611/* 1612 * Called to bridge from the quick to interpreter ABI. On entry the arguments match those 1613 * of a quick call: 1614 * x0 = method being called/to bridge to. 1615 * x1..x7, d0..d7 = arguments to that method. 1616 */ 1617ENTRY art_quick_to_interpreter_bridge 1618 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // Set up frame and save arguments. 1619 1620 // x0 will contain mirror::ArtMethod* method. 1621 mov x1, xSELF // How to get Thread::Current() ??? 1622 mov x2, sp 1623 1624 // uint64_t artQuickToInterpreterBridge(mirror::ArtMethod* method, Thread* self, 1625 // mirror::ArtMethod** sp) 1626 bl artQuickToInterpreterBridge 1627 1628 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME // TODO: no need to restore arguments in this case. 1629 1630 fmov d0, x0 1631 1632 RETURN_OR_DELIVER_PENDING_EXCEPTION 1633END art_quick_to_interpreter_bridge 1634 1635UNIMPLEMENTED art_quick_instrumentation_entry 1636UNIMPLEMENTED art_quick_instrumentation_exit 1637UNIMPLEMENTED art_quick_deoptimize 1638UNIMPLEMENTED art_quick_indexof 1639 1640 /* 1641 * String's compareTo. 1642 * 1643 * TODO: Not very optimized. 1644 * 1645 * On entry: 1646 * x0: this object pointer 1647 * x1: comp object pointer 1648 * 1649 */ 1650 .extern __memcmp16 1651ENTRY art_quick_string_compareto 1652 mov x2, x0 // x0 is return, use x2 for first input. 1653 sub x0, x2, x1 // Same string object? 1654 cbnz x0,1f 1655 ret 16561: // Different string objects. 1657 1658 ldr w6, [x2, #STRING_OFFSET_OFFSET] 1659 ldr w5, [x1, #STRING_OFFSET_OFFSET] 1660 ldr w4, [x2, #STRING_COUNT_OFFSET] 1661 ldr w3, [x1, #STRING_COUNT_OFFSET] 1662 ldr w2, [x2, #STRING_VALUE_OFFSET] 1663 ldr w1, [x1, #STRING_VALUE_OFFSET] 1664 1665 /* 1666 * Now: CharArray* Offset Count 1667 * first arg x2 w6 w4 1668 * second arg x1 w5 w3 1669 */ 1670 1671 // x0 := str1.length(w4) - str2.length(w3). ldr zero-extended w3/w4 into x3/x4. 1672 subs x0, x4, x3 1673 // Min(count1, count2) into w3. 1674 csel x3, x3, x4, ge 1675 1676 // Build pointer into string data. 1677 1678 // Add offset in array (substr etc.) (sign extend and << 1). 1679 add x2, x2, w6, sxtw #1 1680 add x1, x1, w5, sxtw #1 1681 1682 // Add offset in CharArray to array. 1683 add x2, x2, #STRING_DATA_OFFSET 1684 add x1, x1, #STRING_DATA_OFFSET 1685 1686 // Check for long string, do memcmp16 for them. 1687 cmp w3, #28 // Constant from arm32. 1688 bgt .Ldo_memcmp16 1689 1690 /* 1691 * Now: 1692 * x2: *first string data 1693 * x1: *second string data 1694 * w3: iteration count 1695 * x0: return value if comparison equal 1696 * x4, x5, x6, x7: free 1697 */ 1698 1699 // Do a simple unrolled loop. 1700.Lloop: 1701 // At least two more elements? 1702 subs w3, w3, #2 1703 b.lt .Lremainder_or_done 1704 1705 ldrh w4, [x2], #2 1706 ldrh w5, [x1], #2 1707 1708 ldrh w6, [x2], #2 1709 ldrh w7, [x1], #2 1710 1711 subs w4, w4, w5 1712 b.ne .Lw4_result 1713 1714 subs w6, w6, w7 1715 b.ne .Lw6_result 1716 1717 b .Lloop 1718 1719.Lremainder_or_done: 1720 adds w3, w3, #1 1721 b.eq .Lremainder 1722 ret 1723 1724.Lremainder: 1725 ldrh w4, [x2], #2 1726 ldrh w5, [x1], #2 1727 subs w4, w4, w5 1728 b.ne .Lw4_result 1729 ret 1730 1731// Result is in w4 1732.Lw4_result: 1733 sxtw x0, w4 1734 ret 1735 1736// Result is in w6 1737.Lw6_result: 1738 sxtw x0, w6 1739 ret 1740 1741.Ldo_memcmp16: 1742 str x0, [sp,#-16]! // Save x0 1743 1744 mov x0, x2 1745 uxtw x2, w3 1746 bl __memcmp16 1747 1748 ldr x1, [sp], #16 // Restore old x0 = length diff 1749 1750 cmp x0, #0 // Check the memcmp difference 1751 csel x0, x0, x1, ne // x0 := x0 != 0 ? x0 : x1 1752 ret 1753END art_quick_string_compareto 1754