quick_entrypoints_arm64.S revision ed65c5e982705defdb597d94d1aa3f2997239c9b
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 brk 0 201.endm 202 203 204.macro SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 205 sub sp, sp, #304 206 .cfi_adjust_cfa_offset 304 207 208 // Ugly compile-time check, but we only have the preprocessor. 209#if (FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE != 304) 210#error "REFS_AND_ARGS_CALLEE_SAVE_FRAME(ARM64) size not as expected." 211#endif 212 213 stp d0, d1, [sp, #16] 214 stp d2, d3, [sp, #32] 215 stp d4, d5, [sp, #48] 216 stp d6, d7, [sp, #64] 217 stp d8, d9, [sp, #80] 218 stp d10, d11, [sp, #96] 219 stp d12, d13, [sp, #112] 220 stp d14, d15, [sp, #128] 221 222 stp x1, x2, [sp, #144] 223 .cfi_rel_offset x1, 144 224 .cfi_rel_offset x2, 152 225 226 stp x3, x4, [sp, #160] 227 .cfi_rel_offset x3, 160 228 .cfi_rel_offset x4, 168 229 230 stp x5, x6, [sp, #176] 231 .cfi_rel_offset x5, 176 232 .cfi_rel_offset x6, 184 233 234 stp x7, xSELF, [sp, #192] 235 .cfi_rel_offset x7, 192 236 .cfi_rel_offset x18, 200 237 238 stp x19, x20, [sp, #208] 239 .cfi_rel_offset x19, 208 240 .cfi_rel_offset x20, 216 241 242 stp x21, x22, [sp, #224] 243 .cfi_rel_offset x21, 224 244 .cfi_rel_offset x22, 232 245 246 stp x23, x24, [sp, #240] 247 .cfi_rel_offset x23, 240 248 .cfi_rel_offset x24, 248 249 250 stp x25, x26, [sp, #256] 251 .cfi_rel_offset x25, 256 252 .cfi_rel_offset x26, 264 253 254 stp x27, x28, [sp, #272] 255 .cfi_rel_offset x27, 272 256 .cfi_rel_offset x28, 280 257 258 stp xFP, xLR, [sp, #288] 259 .cfi_rel_offset x29, 288 260 .cfi_rel_offset x30, 296 261.endm 262 263 /* 264 * Macro that sets up the callee save frame to conform with 265 * Runtime::CreateCalleeSaveMethod(kRefsAndArgs). 266 * 267 * TODO This is probably too conservative - saving FP & LR. 268 */ 269.macro SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 270 adrp x9, :got:_ZN3art7Runtime9instance_E 271 ldr x9, [x9, #:got_lo12:_ZN3art7Runtime9instance_E] 272 273 // Our registers aren't intermixed - just spill in order. 274 ldr x9,[x9] // x9 = & (art::Runtime * art::Runtime.instance_) . 275 276 // x9 = (ArtMethod*) Runtime.instance_.callee_save_methods[kRefAndArgs] . 277 ldr x9, [x9, RUNTIME_REF_AND_ARGS_CALLEE_SAVE_FRAME_OFFSET ] 278 279 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 280 281 str x9, [sp] // Store ArtMethod* Runtime::callee_save_methods_[kRefsAndArgs] 282.endm 283 284.macro RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 285 286 ldp d0, d1, [sp, #16] 287 ldp d2, d3, [sp, #32] 288 ldp d4, d5, [sp, #48] 289 ldp d6, d7, [sp, #64] 290 ldp d8, d9, [sp, #80] 291 ldp d10, d11, [sp, #96] 292 ldp d12, d13, [sp, #112] 293 ldp d14, d15, [sp, #128] 294 295 // args. 296 ldp x1, x2, [sp, #144] 297 .cfi_restore x1 298 .cfi_restore x2 299 300 ldp x3, x4, [sp, #160] 301 .cfi_restore x3 302 .cfi_restore x4 303 304 ldp x5, x6, [sp, #176] 305 .cfi_restore x5 306 .cfi_restore x6 307 308 ldp x7, xSELF, [sp, #192] 309 .cfi_restore x7 310 .cfi_restore x18 311 312 ldp x19, x20, [sp, #208] 313 .cfi_restore x19 314 .cfi_restore x20 315 316 ldp x21, x22, [sp, #224] 317 .cfi_restore x21 318 .cfi_restore x22 319 320 ldp x23, x24, [sp, #240] 321 .cfi_restore x23 322 .cfi_restore x24 323 324 ldp x25, x26, [sp, #256] 325 .cfi_restore x25 326 .cfi_restore x26 327 328 ldp x27, x28, [sp, #272] 329 .cfi_restore x27 330 .cfi_restore x28 331 332 ldp xFP, xLR, [sp, #288] 333 .cfi_restore x29 334 .cfi_restore x30 335 336 add sp, sp, #304 337 .cfi_adjust_cfa_offset -304 338.endm 339 340.macro RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME_NO_D0 341 342 ldr d1, [sp, #24] 343 ldp d2, d3, [sp, #32] 344 ldp d4, d5, [sp, #48] 345 ldp d6, d7, [sp, #64] 346 ldp d8, d9, [sp, #80] 347 ldp d10, d11, [sp, #96] 348 ldp d12, d13, [sp, #112] 349 ldp d14, d15, [sp, #128] 350 351 // args. 352 ldp x1, x2, [sp, #144] 353 .cfi_restore x1 354 .cfi_restore x2 355 356 ldp x3, x4, [sp, #160] 357 .cfi_restore x3 358 .cfi_restore x4 359 360 ldp x5, x6, [sp, #176] 361 .cfi_restore x5 362 .cfi_restore x6 363 364 ldp x7, xSELF, [sp, #192] 365 .cfi_restore x7 366 .cfi_restore x18 367 368 ldp x19, x20, [sp, #208] 369 .cfi_restore x19 370 .cfi_restore x20 371 372 ldp x21, x22, [sp, #224] 373 .cfi_restore x21 374 .cfi_restore x22 375 376 ldp x23, x24, [sp, #240] 377 .cfi_restore x23 378 .cfi_restore x24 379 380 ldp x25, x26, [sp, #256] 381 .cfi_restore x25 382 .cfi_restore x26 383 384 ldp x27, x28, [sp, #272] 385 .cfi_restore x27 386 .cfi_restore x28 387 388 ldp xFP, xLR, [sp, #288] 389 .cfi_restore x29 390 .cfi_restore x30 391 392 add sp, sp, #304 393 .cfi_adjust_cfa_offset -304 394.endm 395 396.macro RETURN_IF_RESULT_IS_ZERO 397 cbnz x0, 1f // result non-zero branch over 398 ret // return 3991: 400.endm 401 402.macro RETURN_IF_RESULT_IS_NON_ZERO 403 cbz x0, 1f // result zero branch over 404 ret // return 4051: 406.endm 407 408 /* 409 * Macro that set calls through to artDeliverPendingExceptionFromCode, where the pending 410 * exception is Thread::Current()->exception_ 411 */ 412.macro DELIVER_PENDING_EXCEPTION 413 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 414 mov x0, xSELF 415 mov x1, sp 416 417 // Point of no return. 418 b artDeliverPendingExceptionFromCode // artDeliverPendingExceptionFromCode(Thread*, SP) 419 brk 0 // Unreached 420.endm 421 422.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_REG reg 423 ldr \reg, [xSELF, # THREAD_EXCEPTION_OFFSET] // Get exception field. 424 cbnz \reg, 1f 425 ret 4261: 427 DELIVER_PENDING_EXCEPTION 428.endm 429 430.macro RETURN_OR_DELIVER_PENDING_EXCEPTION 431 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG x9 432.endm 433 434// Same as above with x1. This is helpful in stubs that want to avoid clobbering another register. 435.macro RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 436 RETURN_OR_DELIVER_PENDING_EXCEPTION_REG x1 437.endm 438 439.macro RETURN_IF_W0_IS_ZERO_OR_DELIVER 440 cbnz w0, 1f // result non-zero branch over 441 ret // return 4421: 443 DELIVER_PENDING_EXCEPTION 444.endm 445 446.macro NO_ARG_RUNTIME_EXCEPTION c_name, cxx_name 447 .extern \cxx_name 448ENTRY \c_name 449 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 450 mov x0, xSELF // pass Thread::Current 451 mov x1, sp // pass SP 452 b \cxx_name // \cxx_name(Thread*, SP) 453END \c_name 454.endm 455 456.macro ONE_ARG_RUNTIME_EXCEPTION c_name, cxx_name 457 .extern \cxx_name 458ENTRY \c_name 459 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context. 460 mov x1, xSELF // pass Thread::Current. 461 mov x2, sp // pass SP. 462 b \cxx_name // \cxx_name(arg, Thread*, SP). 463 brk 0 464END \c_name 465.endm 466 467.macro TWO_ARG_RUNTIME_EXCEPTION c_name, cxx_name 468 .extern \cxx_name 469ENTRY \c_name 470 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 471 mov x2, xSELF // pass Thread::Current 472 mov x3, sp // pass SP 473 b \cxx_name // \cxx_name(arg1, arg2, Thread*, SP) 474 brk 0 475END \c_name 476.endm 477 478 /* 479 * Called by managed code, saves callee saves and then calls artThrowException 480 * that will place a mock Method* at the bottom of the stack. Arg1 holds the exception. 481 */ 482ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode 483 484 /* 485 * Called by managed code to create and deliver a NullPointerException. 486 */ 487NO_ARG_RUNTIME_EXCEPTION art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode 488 489 /* 490 * Called by managed code to create and deliver an ArithmeticException. 491 */ 492NO_ARG_RUNTIME_EXCEPTION art_quick_throw_div_zero, artThrowDivZeroFromCode 493 494 /* 495 * Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds 496 * index, arg2 holds limit. 497 */ 498TWO_ARG_RUNTIME_EXCEPTION art_quick_throw_array_bounds, artThrowArrayBoundsFromCode 499 500 /* 501 * Called by managed code to create and deliver a StackOverflowError. 502 */ 503NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode 504 505 /* 506 * Called by managed code to create and deliver a NoSuchMethodError. 507 */ 508ONE_ARG_RUNTIME_EXCEPTION art_quick_throw_no_such_method, artThrowNoSuchMethodFromCode 509 510 /* 511 * All generated callsites for interface invokes and invocation slow paths will load arguments 512 * as usual - except instead of loading arg0/x0 with the target Method*, arg0/x0 will contain 513 * the method_idx. This wrapper will save arg1-arg3, load the caller's Method*, align the 514 * stack and call the appropriate C helper. 515 * NOTE: "this" is first visible argument of the target, and so can be found in arg1/x1. 516 * 517 * The helper will attempt to locate the target and return a 128-bit result in x0/x1 consisting 518 * of the target Method* in x0 and method->code_ in x1. 519 * 520 * If unsuccessful, the helper will return NULL/????. There will be a pending exception in the 521 * thread and we branch to another stub to deliver it. 522 * 523 * On success this wrapper will restore arguments and *jump* to the target, leaving the lr 524 * pointing back to the original caller. 525 * 526 * Adapted from ARM32 code. 527 * 528 * Clobbers x12. 529 */ 530.macro INVOKE_TRAMPOLINE c_name, cxx_name 531 .extern \cxx_name 532ENTRY \c_name 533 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // save callee saves in case allocation triggers GC 534 // Helper signature is always 535 // (method_idx, *this_object, *caller_method, *self, sp) 536 537 ldr x2, [sp, #FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE] // pass caller Method* 538 mov x3, xSELF // pass Thread::Current 539 mov x4, sp 540 bl \cxx_name // (method_idx, this, caller, Thread*, SP) 541 mov x12, x1 // save Method*->code_ 542 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 543 cbz x0, 1f // did we find the target? if not go to exception delivery 544 br x12 // tail call to target 5451: 546 DELIVER_PENDING_EXCEPTION 547END \c_name 548.endm 549 550INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline, artInvokeInterfaceTrampoline 551INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck 552 553INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck 554INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck 555INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck 556INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck 557 558 559.macro INVOKE_STUB_CREATE_FRAME 560 561SAVE_SIZE=5*8 // x4, x5, SP, LR & FP saved. 562SAVE_SIZE_AND_METHOD=SAVE_SIZE+8 563 564 mov x9, sp // Save stack pointer. 565 .cfi_register sp,x9 566 567 add x10, x2, # SAVE_SIZE_AND_METHOD // calculate size of frame. 568 sub x10, sp, x10 // Calculate SP position - saves + ArtMethod* + args 569 and x10, x10, # ~0xf // Enforce 16 byte stack alignment. 570 mov sp, x10 // Set new SP. 571 572 sub x10, x9, #SAVE_SIZE // Calculate new FP (later). Done here as we must move SP 573 .cfi_def_cfa_register x10 // before this. 574 .cfi_adjust_cfa_offset SAVE_SIZE 575 576 str x9, [x10, #32] // Save old stack pointer. 577 .cfi_rel_offset sp, 32 578 579 stp x4, x5, [x10, #16] // Save result and shorty addresses. 580 .cfi_rel_offset x4, 16 581 .cfi_rel_offset x5, 24 582 583 stp xFP, xLR, [x10] // Store LR & FP. 584 .cfi_rel_offset x29, 0 585 .cfi_rel_offset x30, 8 586 587 mov xFP, x10 // Use xFP now, as it's callee-saved. 588 .cfi_def_cfa_register x29 589 mov xSELF, x3 // Move thread pointer into SELF register. 590 591 // Copy arguments into stack frame. 592 // Use simple copy routine for now. 593 // 4 bytes per slot. 594 // X1 - source address 595 // W2 - args length 596 // X9 - destination address. 597 // W10 - temporary 598 add x9, sp, #8 // Destination address is bottom of stack + NULL. 599 600 // Use \@ to differentiate between macro invocations. 601.LcopyParams\@: 602 cmp w2, #0 603 beq .LendCopyParams\@ 604 sub w2, w2, #4 // Need 65536 bytes of range. 605 ldr w10, [x1, x2] 606 str w10, [x9, x2] 607 608 b .LcopyParams\@ 609 610.LendCopyParams\@: 611 612 // Store NULL into Method* at bottom of frame. 613 str xzr, [sp] 614 615.endm 616 617.macro INVOKE_STUB_CALL_AND_RETURN 618 619 // load method-> METHOD_QUICK_CODE_OFFSET 620 ldr x9, [x0 , #METHOD_QUICK_CODE_OFFSET] 621 // Branch to method. 622 blr x9 623 624 // Restore return value address and shorty address. 625 ldp x4,x5, [xFP, #16] 626 .cfi_restore x4 627 .cfi_restore x5 628 629 // Store result (w0/x0/s0/d0) appropriately, depending on resultType. 630 ldrb w10, [x5] 631 632 // Don't set anything for a void type. 633 cmp w10, #'V' 634 beq .Lexit_art_quick_invoke_stub\@ 635 636 cmp w10, #'D' 637 bne .Lreturn_is_float\@ 638 str d0, [x4] 639 b .Lexit_art_quick_invoke_stub\@ 640 641.Lreturn_is_float\@: 642 cmp w10, #'F' 643 bne .Lreturn_is_int\@ 644 str s0, [x4] 645 b .Lexit_art_quick_invoke_stub\@ 646 647 // Just store x0. Doesn't matter if it is 64 or 32 bits. 648.Lreturn_is_int\@: 649 str x0, [x4] 650 651.Lexit_art_quick_invoke_stub\@: 652 ldr x2, [x29, #32] // Restore stack pointer. 653 mov sp, x2 654 .cfi_restore sp 655 656 ldp x29, x30, [x29] // Restore old frame pointer and link register. 657 .cfi_restore x29 658 .cfi_restore x30 659 660 ret 661 662.endm 663 664 665/* 666 * extern"C" void art_quick_invoke_stub(ArtMethod *method, x0 667 * uint32_t *args, x1 668 * uint32_t argsize, w2 669 * Thread *self, x3 670 * JValue *result, x4 671 * char *shorty); x5 672 * +----------------------+ 673 * | | 674 * | C/C++ frame | 675 * | LR'' | 676 * | FP'' | <- SP' 677 * +----------------------+ 678 * +----------------------+ 679 * | SP' | 680 * | X5 | 681 * | X4 | Saved registers 682 * | LR' | 683 * | FP' | <- FP 684 * +----------------------+ 685 * | uint32_t out[n-1] | 686 * | : : | Outs 687 * | uint32_t out[0] | 688 * | ArtMethod* NULL | <- SP 689 * +----------------------+ 690 * 691 * Outgoing registers: 692 * x0 - Method* 693 * x1-x7 - integer parameters. 694 * d0-d7 - Floating point parameters. 695 * xSELF = self 696 * SP = & of ArtMethod* 697 * x1 = "this" pointer. 698 * 699 */ 700ENTRY art_quick_invoke_stub 701 // Spill registers as per AACPS64 calling convention. 702 INVOKE_STUB_CREATE_FRAME 703 704 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 705 // Parse the passed shorty to determine which register to load. 706 // Load addresses for routines that load WXSD registers. 707 adr x11, .LstoreW2 708 adr x12, .LstoreX2 709 adr x13, .LstoreS0 710 adr x14, .LstoreD0 711 712 // Initialize routine offsets to 0 for integers and floats. 713 // x8 for integers, x15 for floating point. 714 mov x8, #0 715 mov x15, #0 716 717 add x10, x5, #1 // Load shorty address, plus one to skip return value. 718 ldr w1, [x9],#4 // Load "this" parameter, and increment arg pointer. 719 720 // Loop to fill registers. 721.LfillRegisters: 722 ldrb w17, [x10], #1 // Load next character in signature, and increment. 723 cbz w17, .LcallFunction // Exit at end of signature. Shorty 0 terminated. 724 725 cmp w17, #'F' // is this a float? 726 bne .LisDouble 727 728 cmp x15, # 8*12 // Skip this load if all registers full. 729 beq .Ladvance4 730 731 add x17, x13, x15 // Calculate subroutine to jump to. 732 br x17 733 734.LisDouble: 735 cmp w17, #'D' // is this a double? 736 bne .LisLong 737 738 cmp x15, # 8*12 // Skip this load if all registers full. 739 beq .Ladvance8 740 741 add x17, x14, x15 // Calculate subroutine to jump to. 742 br x17 743 744.LisLong: 745 cmp w17, #'J' // is this a long? 746 bne .LisOther 747 748 cmp x8, # 6*12 // Skip this load if all registers full. 749 beq .Ladvance8 750 751 add x17, x12, x8 // Calculate subroutine to jump to. 752 br x17 753 754.LisOther: // Everything else takes one vReg. 755 cmp x8, # 6*12 // Skip this load if all registers full. 756 beq .Ladvance4 757 758 add x17, x11, x8 // Calculate subroutine to jump to. 759 br x17 760 761.Ladvance4: 762 add x9, x9, #4 763 b .LfillRegisters 764 765.Ladvance8: 766 add x9, x9, #8 767 b .LfillRegisters 768 769// Macro for loading a parameter into a register. 770// counter - the register with offset into these tables 771// size - the size of the register - 4 or 8 bytes. 772// register - the name of the register to be loaded. 773.macro LOADREG counter size register return 774 ldr \register , [x9], #\size 775 add \counter, \counter, 12 776 b \return 777.endm 778 779// Store ints. 780.LstoreW2: 781 LOADREG x8 4 w2 .LfillRegisters 782 LOADREG x8 4 w3 .LfillRegisters 783 LOADREG x8 4 w4 .LfillRegisters 784 LOADREG x8 4 w5 .LfillRegisters 785 LOADREG x8 4 w6 .LfillRegisters 786 LOADREG x8 4 w7 .LfillRegisters 787 788// Store longs. 789.LstoreX2: 790 LOADREG x8 8 x2 .LfillRegisters 791 LOADREG x8 8 x3 .LfillRegisters 792 LOADREG x8 8 x4 .LfillRegisters 793 LOADREG x8 8 x5 .LfillRegisters 794 LOADREG x8 8 x6 .LfillRegisters 795 LOADREG x8 8 x7 .LfillRegisters 796 797// Store singles. 798.LstoreS0: 799 LOADREG x15 4 s0 .LfillRegisters 800 LOADREG x15 4 s1 .LfillRegisters 801 LOADREG x15 4 s2 .LfillRegisters 802 LOADREG x15 4 s3 .LfillRegisters 803 LOADREG x15 4 s4 .LfillRegisters 804 LOADREG x15 4 s5 .LfillRegisters 805 LOADREG x15 4 s6 .LfillRegisters 806 LOADREG x15 4 s7 .LfillRegisters 807 808// Store doubles. 809.LstoreD0: 810 LOADREG x15 8 d0 .LfillRegisters 811 LOADREG x15 8 d1 .LfillRegisters 812 LOADREG x15 8 d2 .LfillRegisters 813 LOADREG x15 8 d3 .LfillRegisters 814 LOADREG x15 8 d4 .LfillRegisters 815 LOADREG x15 8 d5 .LfillRegisters 816 LOADREG x15 8 d6 .LfillRegisters 817 LOADREG x15 8 d7 .LfillRegisters 818 819 820.LcallFunction: 821 822 INVOKE_STUB_CALL_AND_RETURN 823 824END art_quick_invoke_stub 825 826/* extern"C" 827 * void art_quick_invoke_static_stub(ArtMethod *method, x0 828 * uint32_t *args, x1 829 * uint32_t argsize, w2 830 * Thread *self, x3 831 * JValue *result, x4 832 * char *shorty); x5 833 */ 834ENTRY art_quick_invoke_static_stub 835 // Spill registers as per AACPS64 calling convention. 836 INVOKE_STUB_CREATE_FRAME 837 838 // Fill registers x/w1 to x/w7 and s/d0 to s/d7 with parameters. 839 // Parse the passed shorty to determine which register to load. 840 // Load addresses for routines that load WXSD registers. 841 adr x11, .LstoreW1_2 842 adr x12, .LstoreX1_2 843 adr x13, .LstoreS0_2 844 adr x14, .LstoreD0_2 845 846 // Initialize routine offsets to 0 for integers and floats. 847 // x8 for integers, x15 for floating point. 848 mov x8, #0 849 mov x15, #0 850 851 add x10, x5, #1 // Load shorty address, plus one to skip return value. 852 853 // Loop to fill registers. 854.LfillRegisters2: 855 ldrb w17, [x10], #1 // Load next character in signature, and increment. 856 cbz w17, .LcallFunction2 // Exit at end of signature. Shorty 0 terminated. 857 858 cmp w17, #'F' // is this a float? 859 bne .LisDouble2 860 861 cmp x15, # 8*12 // Skip this load if all registers full. 862 beq .Ladvance4_2 863 864 add x17, x13, x15 // Calculate subroutine to jump to. 865 br x17 866 867.LisDouble2: 868 cmp w17, #'D' // is this a double? 869 bne .LisLong2 870 871 cmp x15, # 8*12 // Skip this load if all registers full. 872 beq .Ladvance8_2 873 874 add x17, x14, x15 // Calculate subroutine to jump to. 875 br x17 876 877.LisLong2: 878 cmp w17, #'J' // is this a long? 879 bne .LisOther2 880 881 cmp x8, # 7*12 // Skip this load if all registers full. 882 beq .Ladvance8_2 883 884 add x17, x12, x8 // Calculate subroutine to jump to. 885 br x17 886 887.LisOther2: // Everything else takes one vReg. 888 cmp x8, # 7*12 // Skip this load if all registers full. 889 beq .Ladvance4_2 890 891 add x17, x11, x8 // Calculate subroutine to jump to. 892 br x17 893 894.Ladvance4_2: 895 add x9, x9, #4 896 b .LfillRegisters2 897 898.Ladvance8_2: 899 add x9, x9, #8 900 b .LfillRegisters2 901 902// Store ints. 903.LstoreW1_2: 904 LOADREG x8 4 w1 .LfillRegisters2 905 LOADREG x8 4 w2 .LfillRegisters2 906 LOADREG x8 4 w3 .LfillRegisters2 907 LOADREG x8 4 w4 .LfillRegisters2 908 LOADREG x8 4 w5 .LfillRegisters2 909 LOADREG x8 4 w6 .LfillRegisters2 910 LOADREG x8 4 w7 .LfillRegisters2 911 912// Store longs. 913.LstoreX1_2: 914 LOADREG x8 8 x1 .LfillRegisters2 915 LOADREG x8 8 x2 .LfillRegisters2 916 LOADREG x8 8 x3 .LfillRegisters2 917 LOADREG x8 8 x4 .LfillRegisters2 918 LOADREG x8 8 x5 .LfillRegisters2 919 LOADREG x8 8 x6 .LfillRegisters2 920 LOADREG x8 8 x7 .LfillRegisters2 921 922// Store singles. 923.LstoreS0_2: 924 LOADREG x15 4 s0 .LfillRegisters2 925 LOADREG x15 4 s1 .LfillRegisters2 926 LOADREG x15 4 s2 .LfillRegisters2 927 LOADREG x15 4 s3 .LfillRegisters2 928 LOADREG x15 4 s4 .LfillRegisters2 929 LOADREG x15 4 s5 .LfillRegisters2 930 LOADREG x15 4 s6 .LfillRegisters2 931 LOADREG x15 4 s7 .LfillRegisters2 932 933// Store doubles. 934.LstoreD0_2: 935 LOADREG x15 8 d0 .LfillRegisters2 936 LOADREG x15 8 d1 .LfillRegisters2 937 LOADREG x15 8 d2 .LfillRegisters2 938 LOADREG x15 8 d3 .LfillRegisters2 939 LOADREG x15 8 d4 .LfillRegisters2 940 LOADREG x15 8 d5 .LfillRegisters2 941 LOADREG x15 8 d6 .LfillRegisters2 942 LOADREG x15 8 d7 .LfillRegisters2 943 944 945.LcallFunction2: 946 947 INVOKE_STUB_CALL_AND_RETURN 948 949END art_quick_invoke_static_stub 950 951 952 953 /* 954 * On entry x0 is uintptr_t* gprs_ and x1 is uint64_t* fprs_ 955 */ 956 957ENTRY art_quick_do_long_jump 958 // Load FPRs 959 ldp d0, d1, [x1], #16 960 ldp d2, d3, [x1], #16 961 ldp d4, d5, [x1], #16 962 ldp d6, d7, [x1], #16 963 ldp d8, d9, [x1], #16 964 ldp d10, d11, [x1], #16 965 ldp d12, d13, [x1], #16 966 ldp d14, d15, [x1], #16 967 ldp d16, d17, [x1], #16 968 ldp d18, d19, [x1], #16 969 ldp d20, d21, [x1], #16 970 ldp d22, d23, [x1], #16 971 ldp d24, d25, [x1], #16 972 ldp d26, d27, [x1], #16 973 ldp d28, d29, [x1], #16 974 ldp d30, d31, [x1] 975 976 // Load GPRs 977 // TODO: lots of those are smashed, could optimize. 978 add x0, x0, #30*8 979 ldp x30, x1, [x0], #-16 980 ldp x28, x29, [x0], #-16 981 ldp x26, x27, [x0], #-16 982 ldp x24, x25, [x0], #-16 983 ldp x22, x23, [x0], #-16 984 ldp x20, x21, [x0], #-16 985 ldp x18, x19, [x0], #-16 986 ldp x16, x17, [x0], #-16 987 ldp x14, x15, [x0], #-16 988 ldp x12, x13, [x0], #-16 989 ldp x10, x11, [x0], #-16 990 ldp x8, x9, [x0], #-16 991 ldp x6, x7, [x0], #-16 992 ldp x4, x5, [x0], #-16 993 ldp x2, x3, [x0], #-16 994 mov sp, x1 995 996 // TODO: Is it really OK to use LR for the target PC? 997 mov x0, #0 998 mov x1, #0 999 br xLR 1000END art_quick_do_long_jump 1001 1002 /* 1003 * Entry from managed code that calls artHandleFillArrayDataFromCode and delivers exception on 1004 * failure. 1005 */ 1006 .extern artHandleFillArrayDataFromCode 1007ENTRY art_quick_handle_fill_data 1008 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // Save callee saves in case exception allocation triggers GC. 1009 mov x2, xSELF // Pass Thread::Current. 1010 mov x3, sp // Pass SP. 1011 bl artHandleFillArrayDataFromCode // (Array*, const DexFile::Payload*, Thread*, SP) 1012 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1013 RETURN_IF_RESULT_IS_ZERO 1014 DELIVER_PENDING_EXCEPTION 1015END art_quick_handle_fill_data 1016 1017 /* 1018 * Entry from managed code that calls artLockObjectFromCode, may block for GC. x0 holds the 1019 * possibly null object to lock. 1020 * 1021 * Derived from arm32 code. 1022 */ 1023 .extern artLockObjectFromCode 1024ENTRY art_quick_lock_object 1025 cbz w0, .Lslow_lock 1026 add x4, x0, #LOCK_WORD_OFFSET // exclusive load/store had no immediate anymore 1027.Lretry_lock: 1028 ldr w2, [xSELF, #THREAD_ID_OFFSET] // TODO: Can the thread ID really change during the loop? 1029 ldxr w1, [x4] 1030 cbnz w1, .Lnot_unlocked // already thin locked 1031 stxr w3, w2, [x4] 1032 cbnz w3, .Lstrex_fail // store failed, retry 1033 dmb ishld // full (LoadLoad|LoadStore) memory barrier 1034 ret 1035.Lstrex_fail: 1036 b .Lretry_lock // unlikely forward branch, need to reload and recheck r1/r2 1037.Lnot_unlocked: 1038 lsr w3, w1, 30 1039 cbnz w3, .Lslow_lock // if either of the top two bits are set, go slow path 1040 eor w2, w1, w2 // lock_word.ThreadId() ^ self->ThreadId() 1041 uxth w2, w2 // zero top 16 bits 1042 cbnz w2, .Lslow_lock // lock word and self thread id's match -> recursive lock 1043 // else contention, go to slow path 1044 add w2, w1, #65536 // increment count in lock word placing in w2 for storing 1045 lsr w1, w2, 30 // if either of the top two bits are set, we overflowed. 1046 cbnz w1, .Lslow_lock // if we overflow the count go slow path 1047 str w2, [x0, #LOCK_WORD_OFFSET]// no need for stxr as we hold the lock 1048 ret 1049.Lslow_lock: 1050 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case we block 1051 mov x1, xSELF // pass Thread::Current 1052 mov x2, sp // pass SP 1053 bl artLockObjectFromCode // (Object* obj, Thread*, SP) 1054 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1055 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1056END art_quick_lock_object 1057 1058 /* 1059 * Entry from managed code that calls artUnlockObjectFromCode and delivers exception on failure. 1060 * x0 holds the possibly null object to lock. 1061 * 1062 * Derived from arm32 code. 1063 */ 1064 .extern artUnlockObjectFromCode 1065ENTRY art_quick_unlock_object 1066 cbz x0, .Lslow_unlock 1067 ldr w1, [x0, #LOCK_WORD_OFFSET] 1068 lsr w2, w1, 30 1069 cbnz w2, .Lslow_unlock // if either of the top two bits are set, go slow path 1070 ldr w2, [xSELF, #THREAD_ID_OFFSET] 1071 eor w3, w1, w2 // lock_word.ThreadId() ^ self->ThreadId() 1072 uxth w3, w3 // zero top 16 bits 1073 cbnz w3, .Lslow_unlock // do lock word and self thread id's match? 1074 cmp w1, #65536 1075 bpl .Lrecursive_thin_unlock 1076 // transition to unlocked, w3 holds 0 1077 dmb ish // full (LoadStore|StoreStore) memory barrier 1078 str w3, [x0, #LOCK_WORD_OFFSET] 1079 ret 1080.Lrecursive_thin_unlock: 1081 sub w1, w1, #65536 1082 str w1, [x0, #LOCK_WORD_OFFSET] 1083 ret 1084.Lslow_unlock: 1085 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case exception allocation triggers GC 1086 mov x1, xSELF // pass Thread::Current 1087 mov x2, sp // pass SP 1088 bl artUnlockObjectFromCode // (Object* obj, Thread*, SP) 1089 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1090 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1091END art_quick_unlock_object 1092 1093 /* 1094 * Entry from managed code that calls artIsAssignableFromCode and on failure calls 1095 * artThrowClassCastException. 1096 */ 1097 .extern artThrowClassCastException 1098ENTRY art_quick_check_cast 1099 // Store arguments and link register 1100 sub sp, sp, #32 // Stack needs to be 16b aligned on calls 1101 .cfi_adjust_cfa_offset 32 1102 stp x0, x1, [sp] 1103 .cfi_rel_offset x0, 0 1104 .cfi_rel_offset x1, 8 1105 stp xSELF, xLR, [sp, #16] 1106 .cfi_rel_offset x18, 16 1107 .cfi_rel_offset x30, 24 1108 1109 // Call runtime code 1110 bl artIsAssignableFromCode 1111 1112 // Check for exception 1113 cbz x0, .Lthrow_class_cast_exception 1114 1115 // Restore and return 1116 ldp x0, x1, [sp] 1117 .cfi_restore x0 1118 .cfi_restore x1 1119 ldp xSELF, xLR, [sp, #16] 1120 .cfi_restore x18 1121 .cfi_restore x30 1122 add sp, sp, #32 1123 .cfi_adjust_cfa_offset -32 1124 ret 1125 1126.Lthrow_class_cast_exception: 1127 // Restore 1128 ldp x0, x1, [sp] 1129 .cfi_restore x0 1130 .cfi_restore x1 1131 ldp xSELF, xLR, [sp, #16] 1132 .cfi_restore x18 1133 .cfi_restore x30 1134 add sp, sp, #32 1135 .cfi_adjust_cfa_offset -32 1136 1137 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME // save all registers as basis for long jump context 1138 mov x2, xSELF // pass Thread::Current 1139 mov x3, sp // pass SP 1140 b artThrowClassCastException // (Class*, Class*, Thread*, SP) 1141 brk 0 // We should not return here... 1142END art_quick_check_cast 1143 1144 /* 1145 * Entry from managed code for array put operations of objects where the value being stored 1146 * needs to be checked for compatibility. 1147 * x0 = array, x1 = index, x2 = value 1148 * 1149 * Currently all values should fit into w0/w1/w2, and w1 always will as indices are 32b. We 1150 * assume, though, that the upper 32b are zeroed out. At least for x1/w1 we can do better by 1151 * using index-zero-extension in load/stores. 1152 * 1153 * Temporaries: x3, x4 1154 * TODO: x4 OK? ip seems wrong here. 1155 */ 1156ENTRY art_quick_aput_obj_with_null_and_bound_check 1157 tst x0, x0 1158 bne art_quick_aput_obj_with_bound_check 1159 b art_quick_throw_null_pointer_exception 1160END art_quick_aput_obj_with_null_and_bound_check 1161 1162ENTRY art_quick_aput_obj_with_bound_check 1163 ldr w3, [x0, #ARRAY_LENGTH_OFFSET] 1164 cmp w3, w1 1165 bhi art_quick_aput_obj 1166 mov x0, x1 1167 mov x1, x3 1168 b art_quick_throw_array_bounds 1169END art_quick_aput_obj_with_bound_check 1170 1171ENTRY art_quick_aput_obj 1172 cbz x2, .Ldo_aput_null 1173 ldr w3, [x0, #CLASS_OFFSET] // Heap reference = 32b 1174 // This also zero-extends to x3 1175 ldr w4, [x2, #CLASS_OFFSET] // Heap reference = 32b 1176 // This also zero-extends to x4 1177 ldr w3, [x3, #CLASS_COMPONENT_TYPE_OFFSET] // Heap reference = 32b 1178 // This also zero-extends to x3 1179 cmp w3, w4 // value's type == array's component type - trivial assignability 1180 bne .Lcheck_assignability 1181.Ldo_aput: 1182 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1183 // "Compress" = do nothing 1184 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1185 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1186 lsr x0, x0, #7 1187 strb w3, [x3, x0] 1188 ret 1189.Ldo_aput_null: 1190 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1191 // "Compress" = do nothing 1192 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1193 ret 1194.Lcheck_assignability: 1195 // Store arguments and link register 1196 sub sp, sp, #48 // Stack needs to be 16b aligned on calls 1197 .cfi_adjust_cfa_offset 48 1198 stp x0, x1, [sp] 1199 .cfi_rel_offset x0, 0 1200 .cfi_rel_offset x1, 8 1201 stp x2, xSELF, [sp, #16] 1202 .cfi_rel_offset x2, 16 1203 .cfi_rel_offset x18, 24 1204 str xLR, [sp, #32] 1205 .cfi_rel_offset x30, 32 1206 1207 // Call runtime code 1208 mov x0, x3 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1209 mov x1, x4 // Heap reference, 32b, "uncompress" = do nothing, already zero-extended 1210 bl artIsAssignableFromCode 1211 1212 // Check for exception 1213 cbz x0, .Lthrow_array_store_exception 1214 1215 // Restore 1216 ldp x0, x1, [sp] 1217 .cfi_restore x0 1218 .cfi_restore x1 1219 ldp x2, xSELF, [sp, #16] 1220 .cfi_restore x2 1221 .cfi_restore x18 1222 ldr xLR, [sp, #32] 1223 .cfi_restore x30 1224 add sp, sp, #48 1225 .cfi_adjust_cfa_offset -48 1226 1227 add x3, x0, #OBJECT_ARRAY_DATA_OFFSET 1228 // "Compress" = do nothing 1229 str w2, [x3, x1, lsl #2] // Heap reference = 32b 1230 ldr x3, [xSELF, #THREAD_CARD_TABLE_OFFSET] 1231 lsr x0, x0, #7 1232 strb w3, [x3, x0] 1233 ret 1234.Lthrow_array_store_exception: 1235 ldp x0, x1, [sp] 1236 .cfi_restore x0 1237 .cfi_restore x1 1238 ldp x2, xSELF, [sp, #16] 1239 .cfi_restore x2 1240 .cfi_restore x18 1241 ldr xLR, [sp, #32] 1242 .cfi_restore x30 1243 add sp, sp, #48 1244 .cfi_adjust_cfa_offset -48 1245 1246 SETUP_SAVE_ALL_CALLEE_SAVE_FRAME 1247 mov x1, x2 // Pass value. 1248 mov x2, xSELF // Pass Thread::Current. 1249 mov x3, sp // Pass SP. 1250 b artThrowArrayStoreException // (Object*, Object*, Thread*, SP). 1251 brk 0 // Unreached. 1252END art_quick_aput_obj 1253 1254// Macro to facilitate adding new allocation entrypoints. 1255.macro TWO_ARG_DOWNCALL name, entrypoint, return 1256 .extern \entrypoint 1257ENTRY \name 1258 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1259 mov x2, xSELF // pass Thread::Current 1260 mov x3, sp // pass SP 1261 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*, SP) 1262 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1263 \return 1264 DELIVER_PENDING_EXCEPTION 1265END \name 1266.endm 1267 1268// Macro to facilitate adding new array allocation entrypoints. 1269.macro THREE_ARG_DOWNCALL name, entrypoint, return 1270 .extern \entrypoint 1271ENTRY \name 1272 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1273 mov x3, xSELF // pass Thread::Current 1274 mov x4, sp // pass SP 1275 bl \entrypoint 1276 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1277 \return 1278 DELIVER_PENDING_EXCEPTION 1279END \name 1280.endm 1281 1282// Macros taking opportunity of code similarities for downcalls with referrer. 1283 1284// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1285.macro ONE_ARG_REF_DOWNCALL name, entrypoint, return 1286 .extern \entrypoint 1287ENTRY \name 1288 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1289 ldr x1, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1290 mov x2, xSELF // pass Thread::Current 1291 mov x3, sp // pass SP 1292 bl \entrypoint // (uint32_t type_idx, Method* method, Thread*, SP) 1293 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1294 \return 1295END \name 1296.endm 1297 1298// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1299.macro TWO_ARG_REF_DOWNCALL name, entrypoint, return 1300 .extern \entrypoint 1301ENTRY \name 1302 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1303 ldr x2, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1304 mov x3, xSELF // pass Thread::Current 1305 mov x4, sp // pass SP 1306 bl \entrypoint 1307 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1308 \return 1309END \name 1310.endm 1311 1312// TODO: xSELF -> x19. Temporarily rely on xSELF being saved in REF_ONLY 1313.macro THREE_ARG_REF_DOWNCALL name, entrypoint, return 1314 .extern \entrypoint 1315ENTRY \name 1316 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1317 ldr x3, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1318 mov x4, xSELF // pass Thread::Current 1319 mov x5, sp // pass SP 1320 bl \entrypoint 1321 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1322 \return 1323END \name 1324.endm 1325 1326 /* 1327 * Entry from managed code when uninitialized static storage, this stub will run the class 1328 * initializer and deliver the exception on error. On success the static storage base is 1329 * returned. 1330 */ 1331TWO_ARG_DOWNCALL art_quick_initialize_static_storage, artInitializeStaticStorageFromCode, RETURN_IF_RESULT_IS_NON_ZERO 1332 1333UNIMPLEMENTED art_quick_initialize_type 1334UNIMPLEMENTED art_quick_initialize_type_and_verify_access 1335 1336ONE_ARG_REF_DOWNCALL art_quick_get32_static, artGet32StaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1337ONE_ARG_REF_DOWNCALL art_quick_get64_static, artGet64StaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1338ONE_ARG_REF_DOWNCALL art_quick_get_obj_static, artGetObjStaticFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1339 1340TWO_ARG_REF_DOWNCALL art_quick_get32_instance, artGet32InstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1341TWO_ARG_REF_DOWNCALL art_quick_get64_instance, artGet64InstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1342TWO_ARG_REF_DOWNCALL art_quick_get_obj_instance, artGetObjInstanceFromCode, RETURN_OR_DELIVER_PENDING_EXCEPTION_X1 1343 1344TWO_ARG_REF_DOWNCALL art_quick_set32_static, artSet32StaticFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1345TWO_ARG_REF_DOWNCALL art_quick_set_obj_static, artSetObjStaticFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1346 1347THREE_ARG_REF_DOWNCALL art_quick_set32_instance, artSet32InstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1348THREE_ARG_DOWNCALL art_quick_set64_instance, artSet64InstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1349THREE_ARG_REF_DOWNCALL art_quick_set_obj_instance, artSetObjInstanceFromCode, RETURN_IF_W0_IS_ZERO_OR_DELIVER 1350 1351// This is separated out as the argument order is different. 1352 .extern artSet64StaticFromCode 1353ENTRY art_quick_set64_static 1354 SETUP_REF_ONLY_CALLEE_SAVE_FRAME // save callee saves in case of GC 1355 mov x3, x1 // Store value 1356 ldr x1, [sp, #FRAME_SIZE_REFS_ONLY_CALLEE_SAVE] // Load referrer 1357 mov x2, x3 // Put value param 1358 mov x3, xSELF // pass Thread::Current 1359 mov x4, sp // pass SP 1360 bl artSet64StaticFromCode 1361 RESTORE_REF_ONLY_CALLEE_SAVE_FRAME 1362 RETURN_IF_W0_IS_ZERO_OR_DELIVER 1363END art_quick_set64_static 1364 1365 /* 1366 * Entry from managed code to resolve a string, this stub will allocate a String and deliver an 1367 * exception on error. On success the String is returned. x0 holds the referring method, 1368 * w1 holds the string index. The fast path check for hit in strings cache has already been 1369 * performed. 1370 */ 1371TWO_ARG_DOWNCALL art_quick_resolve_string, artResolveStringFromCode, RETURN_IF_RESULT_IS_NON_ZERO 1372 1373// Generate the allocation entrypoints for each allocator. 1374GENERATE_ALL_ALLOC_ENTRYPOINTS 1375 1376UNIMPLEMENTED art_quick_test_suspend 1377 1378 /* 1379 * Called by managed code that is attempting to call a method on a proxy class. On entry 1380 * x0 holds the proxy method and x1 holds the receiver; The frame size of the invoked proxy 1381 * method agrees with a ref and args callee save frame. 1382 */ 1383 .extern artQuickProxyInvokeHandler 1384ENTRY art_quick_proxy_invoke_handler 1385 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 1386 str x0, [sp, #0] // place proxy method at bottom of frame 1387 mov x2, xSELF // pass Thread::Current 1388 mov x3, sp // pass SP 1389 bl artQuickProxyInvokeHandler // (Method* proxy method, receiver, Thread*, SP) 1390 ldr xSELF, [sp, #200] // Restore self pointer. 1391 ldr x2, [xSELF, THREAD_EXCEPTION_OFFSET] 1392 cbnz x2, .Lexception_in_proxy // success if no exception is pending 1393 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME_NO_D0 // keep d0 1394 ret // return on success 1395.Lexception_in_proxy: 1396 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1397 DELIVER_PENDING_EXCEPTION 1398END art_quick_proxy_invoke_handler 1399 1400 /* 1401 * Called to resolve an imt conflict. x12 is a hidden argument that holds the target method's 1402 * dex method index. 1403 */ 1404ENTRY art_quick_imt_conflict_trampoline 1405 ldr x0, [sp, #0] // load caller Method* 1406 ldr w0, [x0, #METHOD_DEX_CACHE_METHODS_OFFSET] // load dex_cache_resolved_methods 1407 add x0, x0, #OBJECT_ARRAY_DATA_OFFSET // get starting address of data 1408 ldr w0, [x0, x12, lsl 2] // load the target method 1409 b art_quick_invoke_interface_trampoline 1410END art_quick_imt_conflict_trampoline 1411 1412ENTRY art_quick_resolution_trampoline 1413 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME 1414 mov x2, xSELF 1415 mov x3, sp 1416 bl artQuickResolutionTrampoline // (called, receiver, Thread*, SP) 1417 cbz x0, 1f 1418 mov x9, x0 // Remember returned code pointer in x9. 1419 ldr x0, [sp, #0] // artQuickResolutionTrampoline puts called method in *SP. 1420 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1421 br x9 14221: 1423 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1424 DELIVER_PENDING_EXCEPTION 1425END art_quick_resolution_trampoline 1426 1427/* 1428 * Generic JNI frame layout: 1429 * 1430 * #-------------------# 1431 * | | 1432 * | caller method... | 1433 * #-------------------# <--- SP on entry 1434 * | Return X30/LR | 1435 * | X29/FP | callee save 1436 * | X28 | callee save 1437 * | X27 | callee save 1438 * | X26 | callee save 1439 * | X25 | callee save 1440 * | X24 | callee save 1441 * | X23 | callee save 1442 * | X22 | callee save 1443 * | X21 | callee save 1444 * | X20 | callee save 1445 * | X19 | callee save 1446 * | X7 | arg7 1447 * | X6 | arg6 1448 * | X5 | arg5 1449 * | X4 | arg4 1450 * | X3 | arg3 1451 * | X2 | arg2 1452 * | X1 | arg1 1453 * | D15 | float arg 8 1454 * | D14 | float arg 8 1455 * | D13 | float arg 8 1456 * | D12 | callee save 1457 * | D11 | callee save 1458 * | D10 | callee save 1459 * | D9 | callee save 1460 * | D8 | callee save 1461 * | D7 | float arg 8 1462 * | D6 | float arg 7 1463 * | D5 | float arg 6 1464 * | D4 | float arg 5 1465 * | D3 | float arg 4 1466 * | D2 | float arg 3 1467 * | D1 | float arg 2 1468 * | D0 | float arg 1 1469 * | RDI/Method* | <- X0 1470 * #-------------------# 1471 * | local ref cookie | // 4B 1472 * | handle scope size | // 4B 1473 * #-------------------# 1474 * | JNI Call Stack | 1475 * #-------------------# <--- SP on native call 1476 * | | 1477 * | Stack for Regs | The trampoline assembly will pop these values 1478 * | | into registers for native call 1479 * #-------------------# 1480 * | Native code ptr | 1481 * #-------------------# 1482 * | Free scratch | 1483 * #-------------------# 1484 * | Ptr to (1) | <--- SP 1485 * #-------------------# 1486 */ 1487 /* 1488 * Called to do a generic JNI down-call 1489 */ 1490ENTRY art_quick_generic_jni_trampoline 1491 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL 1492 str x0, [sp, #0] // Store native ArtMethod* to bottom of stack. 1493 1494 // Save SP , so we can have static CFI info. 1495 mov x28, sp 1496 .cfi_def_cfa_register x28 1497 1498 // This looks the same, but is different: this will be updated to point to the bottom 1499 // of the frame when the handle scope is inserted. 1500 mov xFP, sp 1501 1502 mov x8, #5120 1503 sub sp, sp, x8 1504 1505 // prepare for artQuickGenericJniTrampoline call 1506 // (Thread*, SP) 1507 // x0 x1 <= C calling convention 1508 // xSELF xFP <= where they are 1509 1510 mov x0, xSELF // Thread* 1511 mov x1, xFP 1512 bl artQuickGenericJniTrampoline // (Thread*, sp) 1513 1514 // Get the updated pointer. This is the bottom of the frame _with_ handle scope. 1515 ldr xFP, [sp] 1516 add x9, sp, #8 1517 1518 cmp x0, #0 1519 b.mi .Lentry_error // Check for error, negative value. 1520 1521 // release part of the alloca. 1522 add x9, x9, x0 1523 1524 // Get the code pointer 1525 ldr xIP0, [x9, #0] 1526 1527 // Load parameters from frame into registers. 1528 // TODO Check with artQuickGenericJniTrampoline. 1529 // Also, check again APPCS64 - the stack arguments are interleaved. 1530 ldp x0, x1, [x9, #8] 1531 ldp x2, x3, [x9, #24] 1532 ldp x4, x5, [x9, #40] 1533 ldp x6, x7, [x9, #56] 1534 1535 ldp d0, d1, [x9, #72] 1536 ldp d2, d3, [x9, #88] 1537 ldp d4, d5, [x9, #104] 1538 ldp d6, d7, [x9, #120] 1539 1540 add sp, x9, #136 1541 1542 blr xIP0 // native call. 1543 1544 // Restore self pointer. 1545 ldr xSELF, [x28, #200] 1546 1547 // result sign extension is handled in C code 1548 // prepare for artQuickGenericJniEndTrampoline call 1549 // (Thread*, SP, result, result_f) 1550 // x0 x1 x2 x3 <= C calling convention 1551 mov x5, x0 // Save return value 1552 mov x0, xSELF // Thread register 1553 mov x1, xFP // Stack pointer 1554 mov x2, x5 // Result (from saved) 1555 fmov x3, d0 // d0 will contain floating point result, but needs to go into x3 1556 1557 bl artQuickGenericJniEndTrampoline 1558 1559 // Tear down the alloca. 1560 mov sp, x28 1561 .cfi_def_cfa_register sp 1562 1563 // Restore self pointer. 1564 ldr xSELF, [x28, #200] 1565 1566 // Pending exceptions possible. 1567 ldr x1, [xSELF, THREAD_EXCEPTION_OFFSET] 1568 cbnz x1, .Lexception_in_native 1569 1570 // Tear down the callee-save frame. 1571 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1572 1573 // store into fpr, for when it's a fpr return... 1574 fmov d0, x0 1575 ret 1576 1577.Lentry_error: 1578 mov sp, x28 1579 .cfi_def_cfa_register sp 1580 ldr xSELF, [x28, #200] 1581.Lexception_in_native: 1582 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME 1583 DELIVER_PENDING_EXCEPTION 1584 1585END art_quick_generic_jni_trampoline 1586 1587/* 1588 * Called to bridge from the quick to interpreter ABI. On entry the arguments match those 1589 * of a quick call: 1590 * x0 = method being called/to bridge to. 1591 * x1..x7, d0..d7 = arguments to that method. 1592 */ 1593ENTRY art_quick_to_interpreter_bridge 1594 SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME // Set up frame and save arguments. 1595 1596 // x0 will contain mirror::ArtMethod* method. 1597 mov x1, xSELF // How to get Thread::Current() ??? 1598 mov x2, sp 1599 1600 // uint64_t artQuickToInterpreterBridge(mirror::ArtMethod* method, Thread* self, 1601 // mirror::ArtMethod** sp) 1602 bl artQuickToInterpreterBridge 1603 1604 RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME // TODO: no need to restore arguments in this case. 1605 1606 fmov d0, x0 1607 1608 RETURN_OR_DELIVER_PENDING_EXCEPTION 1609END art_quick_to_interpreter_bridge 1610 1611UNIMPLEMENTED art_quick_instrumentation_entry 1612UNIMPLEMENTED art_quick_instrumentation_exit 1613UNIMPLEMENTED art_quick_deoptimize 1614UNIMPLEMENTED art_quick_indexof 1615 1616 /* 1617 * String's compareTo. 1618 * 1619 * TODO: Not very optimized. 1620 * 1621 * On entry: 1622 * x0: this object pointer 1623 * x1: comp object pointer 1624 * 1625 */ 1626 .extern __memcmp16 1627ENTRY art_quick_string_compareto 1628 mov x2, x0 // x0 is return, use x2 for first input. 1629 sub x0, x2, x1 // Same string object? 1630 cbnz x0,1f 1631 ret 16321: // Different string objects. 1633 1634 ldr w6, [x2, #STRING_OFFSET_OFFSET] 1635 ldr w5, [x1, #STRING_OFFSET_OFFSET] 1636 ldr w4, [x2, #STRING_COUNT_OFFSET] 1637 ldr w3, [x1, #STRING_COUNT_OFFSET] 1638 ldr w2, [x2, #STRING_VALUE_OFFSET] 1639 ldr w1, [x1, #STRING_VALUE_OFFSET] 1640 1641 /* 1642 * Now: CharArray* Offset Count 1643 * first arg x2 w6 w4 1644 * second arg x1 w5 w3 1645 */ 1646 1647 // x0 := str1.length(w4) - str2.length(w3). ldr zero-extended w3/w4 into x3/x4. 1648 subs x0, x4, x3 1649 // Min(count1, count2) into w3. 1650 csel x3, x3, x4, ge 1651 1652 // Build pointer into string data. 1653 1654 // Add offset in array (substr etc.) (sign extend and << 1). 1655 add x2, x2, w6, sxtw #1 1656 add x1, x1, w5, sxtw #1 1657 1658 // Add offset in CharArray to array. 1659 add x2, x2, #STRING_DATA_OFFSET 1660 add x1, x1, #STRING_DATA_OFFSET 1661 1662 // Check for long string, do memcmp16 for them. 1663 cmp w3, #28 // Constant from arm32. 1664 bgt .Ldo_memcmp16 1665 1666 /* 1667 * Now: 1668 * x2: *first string data 1669 * x1: *second string data 1670 * w3: iteration count 1671 * x0: return value if comparison equal 1672 * x4, x5, x6, x7: free 1673 */ 1674 1675 // Do a simple unrolled loop. 1676.Lloop: 1677 // At least two more elements? 1678 subs w3, w3, #2 1679 b.lt .Lremainder_or_done 1680 1681 ldrh w4, [x2], #2 1682 ldrh w5, [x1], #2 1683 1684 ldrh w6, [x2], #2 1685 ldrh w7, [x1], #2 1686 1687 subs w4, w4, w5 1688 b.ne .Lw4_result 1689 1690 subs w6, w6, w7 1691 b.ne .Lw6_result 1692 1693 b .Lloop 1694 1695.Lremainder_or_done: 1696 adds w3, w3, #1 1697 b.eq .Lremainder 1698 ret 1699 1700.Lremainder: 1701 ldrh w4, [x2], #2 1702 ldrh w5, [x1], #2 1703 subs w4, w4, w5 1704 b.ne .Lw4_result 1705 ret 1706 1707// Result is in w4 1708.Lw4_result: 1709 sxtw x0, w4 1710 ret 1711 1712// Result is in w6 1713.Lw6_result: 1714 sxtw x0, w6 1715 ret 1716 1717.Ldo_memcmp16: 1718 str x0, [sp,#-16]! // Save x0 1719 1720 mov x0, x2 1721 uxtw x2, w3 1722 bl __memcmp16 1723 1724 ldr x1, [sp], #16 // Restore old x0 = length diff 1725 1726 cmp x0, #0 // Check the memcmp difference 1727 csel x0, x0, x1, ne // x0 := x0 != 0 ? x0 : x1 1728 ret 1729END art_quick_string_compareto 1730