contrib/llvm-project/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_ARM64.cpp

   1 //===-- RegisterContextMinidump_ARM64.cpp -----------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "RegisterContextMinidump_ARM64.h"
  10
  11 #include "Utility/ARM64_DWARF_Registers.h"
  12 #include "lldb/Utility/RegisterValue.h"
  13 #include "lldb/Utility/DataExtractor.h"
  14 #include "lldb/lldb-enumerations.h"
  15
  16 // C includes
  17 #include <assert.h>
  18
  19 // C++ includes
  20
  21 using namespace lldb;
  22 using namespace lldb_private;
  23 using namespace minidump;
  24
  25 #define INV LLDB_INVALID_REGNUM
  26 #define OFFSET(r) (offsetof(RegisterContextMinidump_ARM64::Context, r))
  27
  28 #define DEF_X(i)                                                               \
  29   {                                                                            \
  30     "x" #i, nullptr, 8, OFFSET(x) + i * 8, eEncodingUint, eFormatHex,          \
  31         {arm64_dwarf::x##i, arm64_dwarf::x##i, INV, INV, reg_x##i},            \
  32         nullptr, nullptr, nullptr, 0                                           \
  33   }
  34
  35 #define DEF_W(i)                                                               \
  36   {                                                                            \
  37     "w" #i, nullptr, 4, OFFSET(x) + i * 8, eEncodingUint, eFormatHex,          \
  38         {INV, INV, INV, INV, reg_w##i}, nullptr, nullptr, nullptr, 0           \
  39   }
  40
  41 #define DEF_X_ARG(i, n)                                                        \
  42   {                                                                            \
  43     "x" #i, "arg" #n, 8, OFFSET(x) + i * 8, eEncodingUint, eFormatHex,         \
  44         {arm64_dwarf::x##i, arm64_dwarf::x##i, LLDB_REGNUM_GENERIC_ARG1 + i,   \
  45          INV, reg_x##i}, nullptr, nullptr, nullptr, 0                          \
  46   }
  47
  48 #define DEF_V(i)                                                               \
  49   {                                                                            \
  50     "v" #i, nullptr, 16, OFFSET(v) + i * 16, eEncodingVector,                  \
  51         eFormatVectorOfUInt8, {arm64_dwarf::v##i, arm64_dwarf::v##i, INV, INV, \
  52         reg_v##i}, nullptr, nullptr, nullptr, 0                                \
  53   }
  54
  55 #define DEF_D(i)                                                               \
  56   {                                                                            \
  57     "d" #i, nullptr, 8, OFFSET(v) + i * 16, eEncodingVector,                   \
  58         eFormatVectorOfUInt8, {INV, INV, INV, INV, reg_d##i}, nullptr,         \
  59         nullptr, nullptr, 0                                                    \
  60   }
  61
  62 #define DEF_S(i)                                                               \
  63   {                                                                            \
  64     "s" #i, nullptr, 4, OFFSET(v) + i * 16, eEncodingVector,                   \
  65         eFormatVectorOfUInt8, {INV, INV, INV, INV, reg_s##i}, nullptr,         \
  66         nullptr, nullptr, 0                                                    \
  67   }
  68
  69 #define DEF_H(i)                                                               \
  70   {                                                                            \
  71     "h" #i, nullptr, 2, OFFSET(v) + i * 16, eEncodingVector,                   \
  72         eFormatVectorOfUInt8, {INV, INV, INV, INV, reg_h##i}, nullptr,         \
  73         nullptr, nullptr, 0                                                    \
  74   }
  75
  76 // Zero based LLDB register numbers for this register context
  77 enum {
  78   // General Purpose Registers
  79   reg_x0 = 0,
  80   reg_x1,
  81   reg_x2,
  82   reg_x3,
  83   reg_x4,
  84   reg_x5,
  85   reg_x6,
  86   reg_x7,
  87   reg_x8,
  88   reg_x9,
  89   reg_x10,
  90   reg_x11,
  91   reg_x12,
  92   reg_x13,
  93   reg_x14,
  94   reg_x15,
  95   reg_x16,
  96   reg_x17,
  97   reg_x18,
  98   reg_x19,
  99   reg_x20,
 100   reg_x21,
 101   reg_x22,
 102   reg_x23,
 103   reg_x24,
 104   reg_x25,
 105   reg_x26,
 106   reg_x27,
 107   reg_x28,
 108   reg_fp,
 109   reg_lr,
 110   reg_sp,
 111   reg_pc,
 112   reg_w0,
 113   reg_w1,
 114   reg_w2,
 115   reg_w3,
 116   reg_w4,
 117   reg_w5,
 118   reg_w6,
 119   reg_w7,
 120   reg_w8,
 121   reg_w9,
 122   reg_w10,
 123   reg_w11,
 124   reg_w12,
 125   reg_w13,
 126   reg_w14,
 127   reg_w15,
 128   reg_w16,
 129   reg_w17,
 130   reg_w18,
 131   reg_w19,
 132   reg_w20,
 133   reg_w21,
 134   reg_w22,
 135   reg_w23,
 136   reg_w24,
 137   reg_w25,
 138   reg_w26,
 139   reg_w27,
 140   reg_w28,
 141   reg_w29,
 142   reg_w30,
 143   reg_w31,
 144   reg_cpsr,
 145   // Floating Point Registers
 146   reg_fpsr,
 147   reg_fpcr,
 148   reg_v0,
 149   reg_v1,
 150   reg_v2,
 151   reg_v3,
 152   reg_v4,
 153   reg_v5,
 154   reg_v6,
 155   reg_v7,
 156   reg_v8,
 157   reg_v9,
 158   reg_v10,
 159   reg_v11,
 160   reg_v12,
 161   reg_v13,
 162   reg_v14,
 163   reg_v15,
 164   reg_v16,
 165   reg_v17,
 166   reg_v18,
 167   reg_v19,
 168   reg_v20,
 169   reg_v21,
 170   reg_v22,
 171   reg_v23,
 172   reg_v24,
 173   reg_v25,
 174   reg_v26,
 175   reg_v27,
 176   reg_v28,
 177   reg_v29,
 178   reg_v30,
 179   reg_v31,
 180   reg_d0,
 181   reg_d1,
 182   reg_d2,
 183   reg_d3,
 184   reg_d4,
 185   reg_d5,
 186   reg_d6,
 187   reg_d7,
 188   reg_d8,
 189   reg_d9,
 190   reg_d10,
 191   reg_d11,
 192   reg_d12,
 193   reg_d13,
 194   reg_d14,
 195   reg_d15,
 196   reg_d16,
 197   reg_d17,
 198   reg_d18,
 199   reg_d19,
 200   reg_d20,
 201   reg_d21,
 202   reg_d22,
 203   reg_d23,
 204   reg_d24,
 205   reg_d25,
 206   reg_d26,
 207   reg_d27,
 208   reg_d28,
 209   reg_d29,
 210   reg_d30,
 211   reg_d31,
 212   reg_s0,
 213   reg_s1,
 214   reg_s2,
 215   reg_s3,
 216   reg_s4,
 217   reg_s5,
 218   reg_s6,
 219   reg_s7,
 220   reg_s8,
 221   reg_s9,
 222   reg_s10,
 223   reg_s11,
 224   reg_s12,
 225   reg_s13,
 226   reg_s14,
 227   reg_s15,
 228   reg_s16,
 229   reg_s17,
 230   reg_s18,
 231   reg_s19,
 232   reg_s20,
 233   reg_s21,
 234   reg_s22,
 235   reg_s23,
 236   reg_s24,
 237   reg_s25,
 238   reg_s26,
 239   reg_s27,
 240   reg_s28,
 241   reg_s29,
 242   reg_s30,
 243   reg_s31,
 244   reg_h0,
 245   reg_h1,
 246   reg_h2,
 247   reg_h3,
 248   reg_h4,
 249   reg_h5,
 250   reg_h6,
 251   reg_h7,
 252   reg_h8,
 253   reg_h9,
 254   reg_h10,
 255   reg_h11,
 256   reg_h12,
 257   reg_h13,
 258   reg_h14,
 259   reg_h15,
 260   reg_h16,
 261   reg_h17,
 262   reg_h18,
 263   reg_h19,
 264   reg_h20,
 265   reg_h21,
 266   reg_h22,
 267   reg_h23,
 268   reg_h24,
 269   reg_h25,
 270   reg_h26,
 271   reg_h27,
 272   reg_h28,
 273   reg_h29,
 274   reg_h30,
 275   reg_h31,
 276   k_num_regs
 277 };
 278
 279 // Register info definitions for this register context
 280 static RegisterInfo g_reg_infos[] = {
 281     DEF_X_ARG(0, 1),
 282     DEF_X_ARG(1, 2),
 283     DEF_X_ARG(2, 3),
 284     DEF_X_ARG(3, 4),
 285     DEF_X_ARG(4, 5),
 286     DEF_X_ARG(5, 6),
 287     DEF_X_ARG(6, 7),
 288     DEF_X_ARG(7, 8),
 289     DEF_X(8),
 290     DEF_X(9),
 291     DEF_X(10),
 292     DEF_X(11),
 293     DEF_X(12),
 294     DEF_X(13),
 295     DEF_X(14),
 296     DEF_X(15),
 297     DEF_X(16),
 298     DEF_X(17),
 299     DEF_X(18),
 300     DEF_X(19),
 301     DEF_X(20),
 302     DEF_X(21),
 303     DEF_X(22),
 304     DEF_X(23),
 305     DEF_X(24),
 306     DEF_X(25),
 307     DEF_X(26),
 308     DEF_X(27),
 309     DEF_X(28),
 310     {"fp",
 311      "x29",
 312      8,
 313      OFFSET(x) + 29 * 8,
 314      eEncodingUint,
 315      eFormatHex,
 316      {arm64_dwarf::x29, arm64_dwarf::x29, LLDB_REGNUM_GENERIC_FP, INV, reg_fp},
 317      nullptr,
 318      nullptr,
 319      nullptr,
 320      0},
 321     {"lr",
 322      "x30",
 323      8,
 324      OFFSET(x) + 30 * 8,
 325      eEncodingUint,
 326      eFormatHex,
 327      {arm64_dwarf::x30, arm64_dwarf::x30, LLDB_REGNUM_GENERIC_RA, INV, reg_lr},
 328      nullptr,
 329      nullptr,
 330      nullptr,
 331      0},
 332     {"sp",
 333      "x31",
 334      8,
 335      OFFSET(x) + 31 * 8,
 336      eEncodingUint,
 337      eFormatHex,
 338      {arm64_dwarf::x31, arm64_dwarf::x31, LLDB_REGNUM_GENERIC_SP, INV, reg_sp},
 339      nullptr,
 340      nullptr,
 341      nullptr,
 342      0},
 343     {"pc",
 344      nullptr,
 345      8,
 346      OFFSET(pc),
 347      eEncodingUint,
 348      eFormatHex,
 349      {arm64_dwarf::pc, arm64_dwarf::pc, LLDB_REGNUM_GENERIC_PC, INV, reg_pc},
 350      nullptr,
 351      nullptr,
 352      nullptr,
 353      0},
 354     // w0 - w31
 355     DEF_W(0),
 356     DEF_W(1),
 357     DEF_W(2),
 358     DEF_W(3),
 359     DEF_W(4),
 360     DEF_W(5),
 361     DEF_W(6),
 362     DEF_W(7),
 363     DEF_W(8),
 364     DEF_W(9),
 365     DEF_W(10),
 366     DEF_W(11),
 367     DEF_W(12),
 368     DEF_W(13),
 369     DEF_W(14),
 370     DEF_W(15),
 371     DEF_W(16),
 372     DEF_W(17),
 373     DEF_W(18),
 374     DEF_W(19),
 375     DEF_W(20),
 376     DEF_W(21),
 377     DEF_W(22),
 378     DEF_W(23),
 379     DEF_W(24),
 380     DEF_W(25),
 381     DEF_W(26),
 382     DEF_W(27),
 383     DEF_W(28),
 384     DEF_W(29),
 385     DEF_W(30),
 386     DEF_W(31),
 387     {"cpsr",
 388      "psr",
 389      4,
 390      OFFSET(cpsr),
 391      eEncodingUint,
 392      eFormatHex,
 393      {INV, arm64_dwarf::cpsr, LLDB_REGNUM_GENERIC_FLAGS, INV, reg_cpsr},
 394      nullptr,
 395      nullptr,
 396      nullptr,
 397      0},
 398     {"fpsr",
 399      nullptr,
 400      4,
 401      OFFSET(fpsr),
 402      eEncodingUint,
 403      eFormatHex,
 404      {INV, INV, INV, INV, reg_fpsr},
 405      nullptr,
 406      nullptr,
 407      nullptr,
 408      0},
 409     {"fpcr",
 410      nullptr,
 411      4,
 412      OFFSET(fpcr),
 413      eEncodingUint,
 414      eFormatHex,
 415      {INV, INV, INV, INV, reg_fpcr},
 416      nullptr,
 417      nullptr,
 418      nullptr,
 419      0},
 420     // v0 - v31
 421     DEF_V(0),
 422     DEF_V(1),
 423     DEF_V(2),
 424     DEF_V(3),
 425     DEF_V(4),
 426     DEF_V(5),
 427     DEF_V(6),
 428     DEF_V(7),
 429     DEF_V(8),
 430     DEF_V(9),
 431     DEF_V(10),
 432     DEF_V(11),
 433     DEF_V(12),
 434     DEF_V(13),
 435     DEF_V(14),
 436     DEF_V(15),
 437     DEF_V(16),
 438     DEF_V(17),
 439     DEF_V(18),
 440     DEF_V(19),
 441     DEF_V(20),
 442     DEF_V(21),
 443     DEF_V(22),
 444     DEF_V(23),
 445     DEF_V(24),
 446     DEF_V(25),
 447     DEF_V(26),
 448     DEF_V(27),
 449     DEF_V(28),
 450     DEF_V(29),
 451     DEF_V(30),
 452     DEF_V(31),
 453     // d0 - d31
 454     DEF_D(0),
 455     DEF_D(1),
 456     DEF_D(2),
 457     DEF_D(3),
 458     DEF_D(4),
 459     DEF_D(5),
 460     DEF_D(6),
 461     DEF_D(7),
 462     DEF_D(8),
 463     DEF_D(9),
 464     DEF_D(10),
 465     DEF_D(11),
 466     DEF_D(12),
 467     DEF_D(13),
 468     DEF_D(14),
 469     DEF_D(15),
 470     DEF_D(16),
 471     DEF_D(17),
 472     DEF_D(18),
 473     DEF_D(19),
 474     DEF_D(20),
 475     DEF_D(21),
 476     DEF_D(22),
 477     DEF_D(23),
 478     DEF_D(24),
 479     DEF_D(25),
 480     DEF_D(26),
 481     DEF_D(27),
 482     DEF_D(28),
 483     DEF_D(29),
 484     DEF_D(30),
 485     DEF_D(31),
 486     // s0 - s31
 487     DEF_S(0),
 488     DEF_S(1),
 489     DEF_S(2),
 490     DEF_S(3),
 491     DEF_S(4),
 492     DEF_S(5),
 493     DEF_S(6),
 494     DEF_S(7),
 495     DEF_S(8),
 496     DEF_S(9),
 497     DEF_S(10),
 498     DEF_S(11),
 499     DEF_S(12),
 500     DEF_S(13),
 501     DEF_S(14),
 502     DEF_S(15),
 503     DEF_S(16),
 504     DEF_S(17),
 505     DEF_S(18),
 506     DEF_S(19),
 507     DEF_S(20),
 508     DEF_S(21),
 509     DEF_S(22),
 510     DEF_S(23),
 511     DEF_S(24),
 512     DEF_S(25),
 513     DEF_S(26),
 514     DEF_S(27),
 515     DEF_S(28),
 516     DEF_S(29),
 517     DEF_S(30),
 518     DEF_S(31),
 519     // h0 - h31
 520     DEF_H(0),
 521     DEF_H(1),
 522     DEF_H(2),
 523     DEF_H(3),
 524     DEF_H(4),
 525     DEF_H(5),
 526     DEF_H(6),
 527     DEF_H(7),
 528     DEF_H(8),
 529     DEF_H(9),
 530     DEF_H(10),
 531     DEF_H(11),
 532     DEF_H(12),
 533     DEF_H(13),
 534     DEF_H(14),
 535     DEF_H(15),
 536     DEF_H(16),
 537     DEF_H(17),
 538     DEF_H(18),
 539     DEF_H(19),
 540     DEF_H(20),
 541     DEF_H(21),
 542     DEF_H(22),
 543     DEF_H(23),
 544     DEF_H(24),
 545     DEF_H(25),
 546     DEF_H(26),
 547     DEF_H(27),
 548     DEF_H(28),
 549     DEF_H(29),
 550     DEF_H(30),
 551     DEF_H(31),
 552 };
 553
 554 constexpr size_t k_num_reg_infos = llvm::array_lengthof(g_reg_infos);
 555
 556 // ARM64 general purpose registers.
 557 const uint32_t g_gpr_regnums[] = {
 558     reg_x0,
 559     reg_x1,
 560     reg_x2,
 561     reg_x3,
 562     reg_x4,
 563     reg_x5,
 564     reg_x6,
 565     reg_x7,
 566     reg_x8,
 567     reg_x9,
 568     reg_x10,
 569     reg_x11,
 570     reg_x12,
 571     reg_x13,
 572     reg_x14,
 573     reg_x15,
 574     reg_x16,
 575     reg_x17,
 576     reg_x18,
 577     reg_x19,
 578     reg_x20,
 579     reg_x21,
 580     reg_x22,
 581     reg_x23,
 582     reg_x24,
 583     reg_x25,
 584     reg_x26,
 585     reg_x27,
 586     reg_x28,
 587     reg_fp,
 588     reg_lr,
 589     reg_sp,
 590     reg_w0,
 591     reg_w1,
 592     reg_w2,
 593     reg_w3,
 594     reg_w4,
 595     reg_w5,
 596     reg_w6,
 597     reg_w7,
 598     reg_w8,
 599     reg_w9,
 600     reg_w10,
 601     reg_w11,
 602     reg_w12,
 603     reg_w13,
 604     reg_w14,
 605     reg_w15,
 606     reg_w16,
 607     reg_w17,
 608     reg_w18,
 609     reg_w19,
 610     reg_w20,
 611     reg_w21,
 612     reg_w22,
 613     reg_w23,
 614     reg_w24,
 615     reg_w25,
 616     reg_w26,
 617     reg_w27,
 618     reg_w28,
 619     reg_w29,
 620     reg_w30,
 621     reg_w31,
 622     reg_pc,
 623     reg_cpsr,
 624     LLDB_INVALID_REGNUM // register sets need to end with this flag
 625 };
 626 const uint32_t g_fpu_regnums[] = {
 627     reg_v0,
 628     reg_v1,
 629     reg_v2,
 630     reg_v3,
 631     reg_v4,
 632     reg_v5,
 633     reg_v6,
 634     reg_v7,
 635     reg_v8,
 636     reg_v9,
 637     reg_v10,
 638     reg_v11,
 639     reg_v12,
 640     reg_v13,
 641     reg_v14,
 642     reg_v15,
 643     reg_v16,
 644     reg_v17,
 645     reg_v18,
 646     reg_v19,
 647     reg_v20,
 648     reg_v21,
 649     reg_v22,
 650     reg_v23,
 651     reg_v24,
 652     reg_v25,
 653     reg_v26,
 654     reg_v27,
 655     reg_v28,
 656     reg_v29,
 657     reg_v30,
 658     reg_v31,
 659     reg_d0,
 660     reg_d1,
 661     reg_d2,
 662     reg_d3,
 663     reg_d4,
 664     reg_d5,
 665     reg_d6,
 666     reg_d7,
 667     reg_d8,
 668     reg_d9,
 669     reg_d10,
 670     reg_d11,
 671     reg_d12,
 672     reg_d13,
 673     reg_d14,
 674     reg_d15,
 675     reg_d16,
 676     reg_d17,
 677     reg_d18,
 678     reg_d19,
 679     reg_d20,
 680     reg_d21,
 681     reg_d22,
 682     reg_d23,
 683     reg_d24,
 684     reg_d25,
 685     reg_d26,
 686     reg_d27,
 687     reg_d28,
 688     reg_d29,
 689     reg_d30,
 690     reg_d31,
 691     reg_s0,
 692     reg_s1,
 693     reg_s2,
 694     reg_s3,
 695     reg_s4,
 696     reg_s5,
 697     reg_s6,
 698     reg_s7,
 699     reg_s8,
 700     reg_s9,
 701     reg_s10,
 702     reg_s11,
 703     reg_s12,
 704     reg_s13,
 705     reg_s14,
 706     reg_s15,
 707     reg_s16,
 708     reg_s17,
 709     reg_s18,
 710     reg_s19,
 711     reg_s20,
 712     reg_s21,
 713     reg_s22,
 714     reg_s23,
 715     reg_s24,
 716     reg_s25,
 717     reg_s26,
 718     reg_s27,
 719     reg_s28,
 720     reg_s29,
 721     reg_s30,
 722     reg_s31,
 723     reg_h0,
 724     reg_h1,
 725     reg_h2,
 726     reg_h3,
 727     reg_h4,
 728     reg_h5,
 729     reg_h6,
 730     reg_h7,
 731     reg_h8,
 732     reg_h9,
 733     reg_h10,
 734     reg_h11,
 735     reg_h12,
 736     reg_h13,
 737     reg_h14,
 738     reg_h15,
 739     reg_h16,
 740     reg_h17,
 741     reg_h18,
 742     reg_h19,
 743     reg_h20,
 744     reg_h21,
 745     reg_h22,
 746     reg_h23,
 747     reg_h24,
 748     reg_h25,
 749     reg_h26,
 750     reg_h27,
 751     reg_h28,
 752     reg_h29,
 753     reg_h30,
 754     reg_h31,
 755     reg_fpsr,
 756     reg_fpcr,
 757     LLDB_INVALID_REGNUM // register sets need to end with this flag
 758 };
 759
 760 // Skip the last LLDB_INVALID_REGNUM in each count below by subtracting 1
 761 constexpr size_t k_num_gpr_regs = llvm::array_lengthof(g_gpr_regnums) - 1;
 762 constexpr size_t k_num_fpu_regs = llvm::array_lengthof(g_fpu_regnums) - 1;
 763
 764 static RegisterSet g_reg_sets[] = {
 765     {"General Purpose Registers", "gpr", k_num_gpr_regs, g_gpr_regnums},
 766     {"Floating Point Registers", "fpu", k_num_fpu_regs, g_fpu_regnums},
 767 };
 768
 769 constexpr size_t k_num_reg_sets = llvm::array_lengthof(g_reg_sets);
 770
 771 RegisterContextMinidump_ARM64::RegisterContextMinidump_ARM64(
 772     lldb_private::Thread &thread, const DataExtractor &data)
 773     : RegisterContext(thread, 0) {
 774   lldb::offset_t offset = 0;
 775   m_regs.context_flags = data.GetU64(&offset);
 776   for (unsigned i = 0; i < 32; ++i)
 777     m_regs.x[i] = data.GetU64(&offset);
 778   m_regs.pc = data.GetU64(&offset);
 779   m_regs.cpsr = data.GetU32(&offset);
 780   m_regs.fpsr = data.GetU32(&offset);
 781   m_regs.fpcr = data.GetU32(&offset);
 782   auto regs_data = data.GetData(&offset, sizeof(m_regs.v));
 783   if (regs_data)
 784     memcpy(m_regs.v, regs_data, sizeof(m_regs.v));
 785   static_assert(k_num_regs == k_num_reg_infos, "");
 786 }
 787 size_t RegisterContextMinidump_ARM64::GetRegisterCount() { return k_num_regs; }
 788
 789 const RegisterInfo *
 790 RegisterContextMinidump_ARM64::GetRegisterInfoAtIndex(size_t reg) {
 791   if (reg < k_num_reg_infos)
 792     return &g_reg_infos[reg];
 793   return nullptr;
 794 }
 795
 796 size_t RegisterContextMinidump_ARM64::GetRegisterSetCount() {
 797   return k_num_reg_sets;
 798 }
 799
 800 const RegisterSet *RegisterContextMinidump_ARM64::GetRegisterSet(size_t set) {
 801   if (set < k_num_reg_sets)
 802     return &g_reg_sets[set];
 803   return nullptr;
 804 }
 805
 806 const char *RegisterContextMinidump_ARM64::GetRegisterName(unsigned reg) {
 807   if (reg < k_num_reg_infos)
 808     return g_reg_infos[reg].name;
 809   return nullptr;
 810 }
 811
 812 bool RegisterContextMinidump_ARM64::ReadRegister(const RegisterInfo *reg_info,
 813                                                  RegisterValue &reg_value) {
 814   Status error;
 815   reg_value.SetFromMemoryData(
 816       reg_info, (const uint8_t *)&m_regs + reg_info->byte_offset,
 817       reg_info->byte_size, lldb::eByteOrderLittle, error);
 818   return error.Success();
 819 }
 820
 821 bool RegisterContextMinidump_ARM64::WriteRegister(const RegisterInfo *,
 822                                                   const RegisterValue &) {
 823   return false;
 824 }
 825
 826 uint32_t RegisterContextMinidump_ARM64::ConvertRegisterKindToRegisterNumber(
 827     lldb::RegisterKind kind, uint32_t num) {
 828   for (size_t i = 0; i < k_num_regs; ++i) {
 829     if (g_reg_infos[i].kinds[kind] == num)
 830       return i;
 831   }
 832   return LLDB_INVALID_REGNUM;
 833 }