1 //===-- NativeRegisterContextNetBSD_x86_64.cpp ---------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #if defined(__x86_64__) 11 12 #include "NativeRegisterContextNetBSD_x86_64.h" 13 14 #include "lldb/Core/RegisterValue.h" 15 #include "lldb/Host/HostInfo.h" 16 #include "lldb/Utility/DataBufferHeap.h" 17 #include "lldb/Utility/Log.h" 18 #include "lldb/Utility/Status.h" 19 20 #include "Plugins/Process/Utility/RegisterContextNetBSD_x86_64.h" 21 22 // clang-format off 23 #include <sys/types.h> 24 #include <sys/sysctl.h> 25 #include <x86/cpu.h> 26 #include <elf.h> 27 #include <err.h> 28 #include <stdint.h> 29 #include <stdlib.h> 30 // clang-format on 31 32 using namespace lldb_private; 33 using namespace lldb_private::process_netbsd; 34 35 // ---------------------------------------------------------------------------- 36 // Private namespace. 37 // ---------------------------------------------------------------------------- 38 39 namespace { 40 // x86 64-bit general purpose registers. 41 static const uint32_t g_gpr_regnums_x86_64[] = { 42 lldb_rax_x86_64, lldb_rbx_x86_64, lldb_rcx_x86_64, lldb_rdx_x86_64, 43 lldb_rdi_x86_64, lldb_rsi_x86_64, lldb_rbp_x86_64, lldb_rsp_x86_64, 44 lldb_r8_x86_64, lldb_r9_x86_64, lldb_r10_x86_64, lldb_r11_x86_64, 45 lldb_r12_x86_64, lldb_r13_x86_64, lldb_r14_x86_64, lldb_r15_x86_64, 46 lldb_rip_x86_64, lldb_rflags_x86_64, lldb_cs_x86_64, lldb_fs_x86_64, 47 lldb_gs_x86_64, lldb_ss_x86_64, lldb_ds_x86_64, lldb_es_x86_64, 48 lldb_eax_x86_64, lldb_ebx_x86_64, lldb_ecx_x86_64, lldb_edx_x86_64, 49 lldb_edi_x86_64, lldb_esi_x86_64, lldb_ebp_x86_64, lldb_esp_x86_64, 50 lldb_r8d_x86_64, // Low 32 bits or r8 51 lldb_r9d_x86_64, // Low 32 bits or r9 52 lldb_r10d_x86_64, // Low 32 bits or r10 53 lldb_r11d_x86_64, // Low 32 bits or r11 54 lldb_r12d_x86_64, // Low 32 bits or r12 55 lldb_r13d_x86_64, // Low 32 bits or r13 56 lldb_r14d_x86_64, // Low 32 bits or r14 57 lldb_r15d_x86_64, // Low 32 bits or r15 58 lldb_ax_x86_64, lldb_bx_x86_64, lldb_cx_x86_64, lldb_dx_x86_64, 59 lldb_di_x86_64, lldb_si_x86_64, lldb_bp_x86_64, lldb_sp_x86_64, 60 lldb_r8w_x86_64, // Low 16 bits or r8 61 lldb_r9w_x86_64, // Low 16 bits or r9 62 lldb_r10w_x86_64, // Low 16 bits or r10 63 lldb_r11w_x86_64, // Low 16 bits or r11 64 lldb_r12w_x86_64, // Low 16 bits or r12 65 lldb_r13w_x86_64, // Low 16 bits or r13 66 lldb_r14w_x86_64, // Low 16 bits or r14 67 lldb_r15w_x86_64, // Low 16 bits or r15 68 lldb_ah_x86_64, lldb_bh_x86_64, lldb_ch_x86_64, lldb_dh_x86_64, 69 lldb_al_x86_64, lldb_bl_x86_64, lldb_cl_x86_64, lldb_dl_x86_64, 70 lldb_dil_x86_64, lldb_sil_x86_64, lldb_bpl_x86_64, lldb_spl_x86_64, 71 lldb_r8l_x86_64, // Low 8 bits or r8 72 lldb_r9l_x86_64, // Low 8 bits or r9 73 lldb_r10l_x86_64, // Low 8 bits or r10 74 lldb_r11l_x86_64, // Low 8 bits or r11 75 lldb_r12l_x86_64, // Low 8 bits or r12 76 lldb_r13l_x86_64, // Low 8 bits or r13 77 lldb_r14l_x86_64, // Low 8 bits or r14 78 lldb_r15l_x86_64, // Low 8 bits or r15 79 LLDB_INVALID_REGNUM // register sets need to end with this flag 80 }; 81 static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 82 1 == 83 k_num_gpr_registers_x86_64, 84 "g_gpr_regnums_x86_64 has wrong number of register infos"); 85 86 // Number of register sets provided by this context. 87 enum { k_num_extended_register_sets = 2, k_num_register_sets = 4 }; 88 89 // Register sets for x86 64-bit. 90 static const RegisterSet g_reg_sets_x86_64[k_num_register_sets] = { 91 {"General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, 92 g_gpr_regnums_x86_64}, 93 }; 94 95 #define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) 96 97 const int fpu_present = []() -> int { 98 int mib[2]; 99 int error; 100 size_t len; 101 int val; 102 103 len = sizeof(val); 104 mib[0] = CTL_MACHDEP; 105 mib[1] = CPU_FPU_PRESENT; 106 107 error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); 108 if (error) 109 errx(EXIT_FAILURE, "sysctl"); 110 111 return val; 112 }(); 113 114 const int osfxsr = []() -> int { 115 int mib[2]; 116 int error; 117 size_t len; 118 int val; 119 120 len = sizeof(val); 121 mib[0] = CTL_MACHDEP; 122 mib[1] = CPU_OSFXSR; 123 124 error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); 125 if (error) 126 errx(EXIT_FAILURE, "sysctl"); 127 128 return val; 129 }(); 130 131 const int fpu_save = []() -> int { 132 int mib[2]; 133 int error; 134 size_t len; 135 int val; 136 137 len = sizeof(val); 138 mib[0] = CTL_MACHDEP; 139 mib[1] = CPU_FPU_SAVE; 140 141 error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); 142 if (error) 143 errx(EXIT_FAILURE, "sysctl"); 144 145 return val; 146 }(); 147 148 } // namespace 149 150 NativeRegisterContextNetBSD * 151 NativeRegisterContextNetBSD::CreateHostNativeRegisterContextNetBSD( 152 const ArchSpec &target_arch, NativeThreadProtocol &native_thread, 153 uint32_t concrete_frame_idx) { 154 return new NativeRegisterContextNetBSD_x86_64(target_arch, native_thread, 155 concrete_frame_idx); 156 } 157 158 // ---------------------------------------------------------------------------- 159 // NativeRegisterContextNetBSD_x86_64 members. 160 // ---------------------------------------------------------------------------- 161 162 static RegisterInfoInterface * 163 CreateRegisterInfoInterface(const ArchSpec &target_arch) { 164 assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && 165 "Register setting path assumes this is a 64-bit host"); 166 // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the 167 // x86_64 register context. 168 return new RegisterContextNetBSD_x86_64(target_arch); 169 } 170 171 NativeRegisterContextNetBSD_x86_64::NativeRegisterContextNetBSD_x86_64( 172 const ArchSpec &target_arch, NativeThreadProtocol &native_thread, 173 uint32_t concrete_frame_idx) 174 : NativeRegisterContextNetBSD(native_thread, concrete_frame_idx, 175 CreateRegisterInfoInterface(target_arch)), 176 m_gpr_x86_64(), m_fpr_x86_64(), m_dbr_x86_64() {} 177 178 // CONSIDER after local and llgs debugging are merged, register set support can 179 // be moved into a base x86-64 class with IsRegisterSetAvailable made virtual. 180 uint32_t NativeRegisterContextNetBSD_x86_64::GetRegisterSetCount() const { 181 uint32_t sets = 0; 182 for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index) { 183 if (GetSetForNativeRegNum(set_index) != -1) 184 ++sets; 185 } 186 187 return sets; 188 } 189 190 const RegisterSet * 191 NativeRegisterContextNetBSD_x86_64::GetRegisterSet(uint32_t set_index) const { 192 switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { 193 case llvm::Triple::x86_64: 194 return &g_reg_sets_x86_64[set_index]; 195 default: 196 assert(false && "Unhandled target architecture."); 197 return nullptr; 198 } 199 200 return nullptr; 201 } 202 203 int NativeRegisterContextNetBSD_x86_64::GetSetForNativeRegNum( 204 int reg_num) const { 205 if (reg_num <= k_last_gpr_x86_64) 206 return GPRegSet; 207 else if (reg_num <= k_last_fpr_x86_64) 208 return (fpu_present == 1 && osfxsr == 1 && fpu_save >= 1) ? FPRegSet : -1; 209 else if (reg_num <= k_last_avx_x86_64) 210 return -1; // AVX 211 else if (reg_num <= k_last_mpxr_x86_64) 212 return -1; // MPXR 213 else if (reg_num <= k_last_mpxc_x86_64) 214 return -1; // MPXC 215 else if (reg_num <= lldb_dr7_x86_64) 216 return DBRegSet; // DBR 217 else 218 return -1; 219 } 220 221 int NativeRegisterContextNetBSD_x86_64::ReadRegisterSet(uint32_t set) { 222 switch (set) { 223 case GPRegSet: 224 ReadGPR(); 225 return 0; 226 case FPRegSet: 227 ReadFPR(); 228 return 0; 229 case DBRegSet: 230 ReadDBR(); 231 return 0; 232 default: 233 break; 234 } 235 return -1; 236 } 237 int NativeRegisterContextNetBSD_x86_64::WriteRegisterSet(uint32_t set) { 238 switch (set) { 239 case GPRegSet: 240 WriteGPR(); 241 return 0; 242 case FPRegSet: 243 WriteFPR(); 244 return 0; 245 case DBRegSet: 246 WriteDBR(); 247 return 0; 248 default: 249 break; 250 } 251 return -1; 252 } 253 254 Status 255 NativeRegisterContextNetBSD_x86_64::ReadRegister(const RegisterInfo *reg_info, 256 RegisterValue ®_value) { 257 Status error; 258 259 if (!reg_info) { 260 error.SetErrorString("reg_info NULL"); 261 return error; 262 } 263 264 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 265 if (reg == LLDB_INVALID_REGNUM) { 266 // This is likely an internal register for lldb use only and should not be 267 // directly queried. 268 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 269 "register, cannot read directly", 270 reg_info->name); 271 return error; 272 } 273 274 int set = GetSetForNativeRegNum(reg); 275 if (set == -1) { 276 // This is likely an internal register for lldb use only and should not be 277 // directly queried. 278 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 279 reg_info->name); 280 return error; 281 } 282 283 if (ReadRegisterSet(set) != 0) { 284 // This is likely an internal register for lldb use only and should not be 285 // directly queried. 286 error.SetErrorStringWithFormat( 287 "reading register set for register \"%s\" failed", reg_info->name); 288 return error; 289 } 290 291 switch (reg) { 292 case lldb_rax_x86_64: 293 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RAX]; 294 break; 295 case lldb_rbx_x86_64: 296 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBX]; 297 break; 298 case lldb_rcx_x86_64: 299 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RCX]; 300 break; 301 case lldb_rdx_x86_64: 302 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDX]; 303 break; 304 case lldb_rdi_x86_64: 305 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDI]; 306 break; 307 case lldb_rsi_x86_64: 308 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSI]; 309 break; 310 case lldb_rbp_x86_64: 311 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBP]; 312 break; 313 case lldb_rsp_x86_64: 314 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSP]; 315 break; 316 case lldb_r8_x86_64: 317 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R8]; 318 break; 319 case lldb_r9_x86_64: 320 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R9]; 321 break; 322 case lldb_r10_x86_64: 323 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R10]; 324 break; 325 case lldb_r11_x86_64: 326 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R11]; 327 break; 328 case lldb_r12_x86_64: 329 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R12]; 330 break; 331 case lldb_r13_x86_64: 332 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R13]; 333 break; 334 case lldb_r14_x86_64: 335 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R14]; 336 break; 337 case lldb_r15_x86_64: 338 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R15]; 339 break; 340 case lldb_rip_x86_64: 341 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RIP]; 342 break; 343 case lldb_rflags_x86_64: 344 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RFLAGS]; 345 break; 346 case lldb_cs_x86_64: 347 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_CS]; 348 break; 349 case lldb_fs_x86_64: 350 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_FS]; 351 break; 352 case lldb_gs_x86_64: 353 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_GS]; 354 break; 355 case lldb_ss_x86_64: 356 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_SS]; 357 break; 358 case lldb_ds_x86_64: 359 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_DS]; 360 break; 361 case lldb_es_x86_64: 362 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_ES]; 363 break; 364 case lldb_fctrl_x86_64: 365 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_cw; 366 break; 367 case lldb_fstat_x86_64: 368 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_sw; 369 break; 370 case lldb_ftag_x86_64: 371 reg_value = (uint8_t)m_fpr_x86_64.fxstate.fx_tw; 372 break; 373 case lldb_fop_x86_64: 374 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_opcode; 375 break; 376 case lldb_fiseg_x86_64: 377 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_ip.fa_64; 378 break; 379 case lldb_fioff_x86_64: 380 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off; 381 break; 382 case lldb_foseg_x86_64: 383 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_dp.fa_64; 384 break; 385 case lldb_fooff_x86_64: 386 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off; 387 break; 388 case lldb_mxcsr_x86_64: 389 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr; 390 break; 391 case lldb_mxcsrmask_x86_64: 392 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr_mask; 393 break; 394 case lldb_st0_x86_64: 395 case lldb_st1_x86_64: 396 case lldb_st2_x86_64: 397 case lldb_st3_x86_64: 398 case lldb_st4_x86_64: 399 case lldb_st5_x86_64: 400 case lldb_st6_x86_64: 401 case lldb_st7_x86_64: 402 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 403 reg_info->byte_size, endian::InlHostByteOrder()); 404 break; 405 case lldb_mm0_x86_64: 406 case lldb_mm1_x86_64: 407 case lldb_mm2_x86_64: 408 case lldb_mm3_x86_64: 409 case lldb_mm4_x86_64: 410 case lldb_mm5_x86_64: 411 case lldb_mm6_x86_64: 412 case lldb_mm7_x86_64: 413 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], 414 reg_info->byte_size, endian::InlHostByteOrder()); 415 break; 416 case lldb_xmm0_x86_64: 417 case lldb_xmm1_x86_64: 418 case lldb_xmm2_x86_64: 419 case lldb_xmm3_x86_64: 420 case lldb_xmm4_x86_64: 421 case lldb_xmm5_x86_64: 422 case lldb_xmm6_x86_64: 423 case lldb_xmm7_x86_64: 424 case lldb_xmm8_x86_64: 425 case lldb_xmm9_x86_64: 426 case lldb_xmm10_x86_64: 427 case lldb_xmm11_x86_64: 428 case lldb_xmm12_x86_64: 429 case lldb_xmm13_x86_64: 430 case lldb_xmm14_x86_64: 431 case lldb_xmm15_x86_64: 432 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 433 reg_info->byte_size, endian::InlHostByteOrder()); 434 break; 435 case lldb_dr0_x86_64: 436 case lldb_dr1_x86_64: 437 case lldb_dr2_x86_64: 438 case lldb_dr3_x86_64: 439 case lldb_dr4_x86_64: 440 case lldb_dr5_x86_64: 441 case lldb_dr6_x86_64: 442 case lldb_dr7_x86_64: 443 reg_value = (uint64_t)m_dbr_x86_64.dr[reg - lldb_dr0_x86_64]; 444 break; 445 } 446 447 return error; 448 } 449 450 Status NativeRegisterContextNetBSD_x86_64::WriteRegister( 451 const RegisterInfo *reg_info, const RegisterValue ®_value) { 452 453 Status error; 454 455 if (!reg_info) { 456 error.SetErrorString("reg_info NULL"); 457 return error; 458 } 459 460 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 461 if (reg == LLDB_INVALID_REGNUM) { 462 // This is likely an internal register for lldb use only and should not be 463 // directly queried. 464 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 465 "register, cannot read directly", 466 reg_info->name); 467 return error; 468 } 469 470 int set = GetSetForNativeRegNum(reg); 471 if (set == -1) { 472 // This is likely an internal register for lldb use only and should not be 473 // directly queried. 474 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 475 reg_info->name); 476 return error; 477 } 478 479 if (ReadRegisterSet(set) != 0) { 480 // This is likely an internal register for lldb use only and should not be 481 // directly queried. 482 error.SetErrorStringWithFormat( 483 "reading register set for register \"%s\" failed", reg_info->name); 484 return error; 485 } 486 487 switch (reg) { 488 case lldb_rax_x86_64: 489 m_gpr_x86_64.regs[_REG_RAX] = reg_value.GetAsUInt64(); 490 break; 491 case lldb_rbx_x86_64: 492 m_gpr_x86_64.regs[_REG_RBX] = reg_value.GetAsUInt64(); 493 break; 494 case lldb_rcx_x86_64: 495 m_gpr_x86_64.regs[_REG_RCX] = reg_value.GetAsUInt64(); 496 break; 497 case lldb_rdx_x86_64: 498 m_gpr_x86_64.regs[_REG_RDX] = reg_value.GetAsUInt64(); 499 break; 500 case lldb_rdi_x86_64: 501 m_gpr_x86_64.regs[_REG_RDI] = reg_value.GetAsUInt64(); 502 break; 503 case lldb_rsi_x86_64: 504 m_gpr_x86_64.regs[_REG_RSI] = reg_value.GetAsUInt64(); 505 break; 506 case lldb_rbp_x86_64: 507 m_gpr_x86_64.regs[_REG_RBP] = reg_value.GetAsUInt64(); 508 break; 509 case lldb_rsp_x86_64: 510 m_gpr_x86_64.regs[_REG_RSP] = reg_value.GetAsUInt64(); 511 break; 512 case lldb_r8_x86_64: 513 m_gpr_x86_64.regs[_REG_R8] = reg_value.GetAsUInt64(); 514 break; 515 case lldb_r9_x86_64: 516 m_gpr_x86_64.regs[_REG_R9] = reg_value.GetAsUInt64(); 517 break; 518 case lldb_r10_x86_64: 519 m_gpr_x86_64.regs[_REG_R10] = reg_value.GetAsUInt64(); 520 break; 521 case lldb_r11_x86_64: 522 m_gpr_x86_64.regs[_REG_R11] = reg_value.GetAsUInt64(); 523 break; 524 case lldb_r12_x86_64: 525 m_gpr_x86_64.regs[_REG_R12] = reg_value.GetAsUInt64(); 526 break; 527 case lldb_r13_x86_64: 528 m_gpr_x86_64.regs[_REG_R13] = reg_value.GetAsUInt64(); 529 break; 530 case lldb_r14_x86_64: 531 m_gpr_x86_64.regs[_REG_R14] = reg_value.GetAsUInt64(); 532 break; 533 case lldb_r15_x86_64: 534 m_gpr_x86_64.regs[_REG_R15] = reg_value.GetAsUInt64(); 535 break; 536 case lldb_rip_x86_64: 537 m_gpr_x86_64.regs[_REG_RIP] = reg_value.GetAsUInt64(); 538 break; 539 case lldb_rflags_x86_64: 540 m_gpr_x86_64.regs[_REG_RFLAGS] = reg_value.GetAsUInt64(); 541 break; 542 case lldb_cs_x86_64: 543 m_gpr_x86_64.regs[_REG_CS] = reg_value.GetAsUInt64(); 544 break; 545 case lldb_fs_x86_64: 546 m_gpr_x86_64.regs[_REG_FS] = reg_value.GetAsUInt64(); 547 break; 548 case lldb_gs_x86_64: 549 m_gpr_x86_64.regs[_REG_GS] = reg_value.GetAsUInt64(); 550 break; 551 case lldb_ss_x86_64: 552 m_gpr_x86_64.regs[_REG_SS] = reg_value.GetAsUInt64(); 553 break; 554 case lldb_ds_x86_64: 555 m_gpr_x86_64.regs[_REG_DS] = reg_value.GetAsUInt64(); 556 break; 557 case lldb_es_x86_64: 558 m_gpr_x86_64.regs[_REG_ES] = reg_value.GetAsUInt64(); 559 break; 560 case lldb_fctrl_x86_64: 561 m_fpr_x86_64.fxstate.fx_cw = reg_value.GetAsUInt16(); 562 break; 563 case lldb_fstat_x86_64: 564 m_fpr_x86_64.fxstate.fx_sw = reg_value.GetAsUInt16(); 565 break; 566 case lldb_ftag_x86_64: 567 m_fpr_x86_64.fxstate.fx_tw = reg_value.GetAsUInt8(); 568 break; 569 case lldb_fop_x86_64: 570 m_fpr_x86_64.fxstate.fx_opcode = reg_value.GetAsUInt16(); 571 break; 572 case lldb_fiseg_x86_64: 573 m_fpr_x86_64.fxstate.fx_ip.fa_64 = reg_value.GetAsUInt64(); 574 break; 575 case lldb_fioff_x86_64: 576 m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off = reg_value.GetAsUInt32(); 577 break; 578 case lldb_foseg_x86_64: 579 m_fpr_x86_64.fxstate.fx_dp.fa_64 = reg_value.GetAsUInt64(); 580 break; 581 case lldb_fooff_x86_64: 582 m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off = reg_value.GetAsUInt32(); 583 break; 584 case lldb_mxcsr_x86_64: 585 m_fpr_x86_64.fxstate.fx_mxcsr = reg_value.GetAsUInt32(); 586 break; 587 case lldb_mxcsrmask_x86_64: 588 m_fpr_x86_64.fxstate.fx_mxcsr_mask = reg_value.GetAsUInt32(); 589 break; 590 case lldb_st0_x86_64: 591 case lldb_st1_x86_64: 592 case lldb_st2_x86_64: 593 case lldb_st3_x86_64: 594 case lldb_st4_x86_64: 595 case lldb_st5_x86_64: 596 case lldb_st6_x86_64: 597 case lldb_st7_x86_64: 598 ::memcpy(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 599 reg_value.GetBytes(), reg_value.GetByteSize()); 600 break; 601 case lldb_mm0_x86_64: 602 case lldb_mm1_x86_64: 603 case lldb_mm2_x86_64: 604 case lldb_mm3_x86_64: 605 case lldb_mm4_x86_64: 606 case lldb_mm5_x86_64: 607 case lldb_mm6_x86_64: 608 case lldb_mm7_x86_64: 609 ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], 610 reg_value.GetBytes(), reg_value.GetByteSize()); 611 break; 612 case lldb_xmm0_x86_64: 613 case lldb_xmm1_x86_64: 614 case lldb_xmm2_x86_64: 615 case lldb_xmm3_x86_64: 616 case lldb_xmm4_x86_64: 617 case lldb_xmm5_x86_64: 618 case lldb_xmm6_x86_64: 619 case lldb_xmm7_x86_64: 620 case lldb_xmm8_x86_64: 621 case lldb_xmm9_x86_64: 622 case lldb_xmm10_x86_64: 623 case lldb_xmm11_x86_64: 624 case lldb_xmm12_x86_64: 625 case lldb_xmm13_x86_64: 626 case lldb_xmm14_x86_64: 627 case lldb_xmm15_x86_64: 628 ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 629 reg_value.GetBytes(), reg_value.GetByteSize()); 630 break; 631 case lldb_dr0_x86_64: 632 case lldb_dr1_x86_64: 633 case lldb_dr2_x86_64: 634 case lldb_dr3_x86_64: 635 case lldb_dr4_x86_64: 636 case lldb_dr5_x86_64: 637 case lldb_dr6_x86_64: 638 case lldb_dr7_x86_64: 639 m_dbr_x86_64.dr[reg - lldb_dr0_x86_64] = reg_value.GetAsUInt64(); 640 break; 641 } 642 643 if (WriteRegisterSet(set) != 0) 644 error.SetErrorStringWithFormat("failed to write register set"); 645 646 return error; 647 } 648 649 Status NativeRegisterContextNetBSD_x86_64::ReadAllRegisterValues( 650 lldb::DataBufferSP &data_sp) { 651 Status error; 652 653 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); 654 if (!data_sp) { 655 error.SetErrorStringWithFormat( 656 "failed to allocate DataBufferHeap instance of size %" PRIu64, 657 REG_CONTEXT_SIZE); 658 return error; 659 } 660 661 error = ReadGPR(); 662 if (error.Fail()) 663 return error; 664 665 uint8_t *dst = data_sp->GetBytes(); 666 if (dst == nullptr) { 667 error.SetErrorStringWithFormat("DataBufferHeap instance of size %" PRIu64 668 " returned a null pointer", 669 REG_CONTEXT_SIZE); 670 return error; 671 } 672 673 ::memcpy(dst, &m_gpr_x86_64, GetRegisterInfoInterface().GetGPRSize()); 674 dst += GetRegisterInfoInterface().GetGPRSize(); 675 676 RegisterValue value((uint64_t)-1); 677 const RegisterInfo *reg_info = 678 GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_eax"); 679 if (reg_info == nullptr) 680 reg_info = GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_rax"); 681 return error; 682 } 683 684 Status NativeRegisterContextNetBSD_x86_64::WriteAllRegisterValues( 685 const lldb::DataBufferSP &data_sp) { 686 Status error; 687 688 if (!data_sp) { 689 error.SetErrorStringWithFormat( 690 "NativeRegisterContextNetBSD_x86_64::%s invalid data_sp provided", 691 __FUNCTION__); 692 return error; 693 } 694 695 if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { 696 error.SetErrorStringWithFormat( 697 "NativeRegisterContextNetBSD_x86_64::%s data_sp contained mismatched " 698 "data size, expected %" PRIu64 ", actual %" PRIu64, 699 __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); 700 return error; 701 } 702 703 uint8_t *src = data_sp->GetBytes(); 704 if (src == nullptr) { 705 error.SetErrorStringWithFormat("NativeRegisterContextNetBSD_x86_64::%s " 706 "DataBuffer::GetBytes() returned a null " 707 "pointer", 708 __FUNCTION__); 709 return error; 710 } 711 ::memcpy(&m_gpr_x86_64, src, GetRegisterInfoInterface().GetGPRSize()); 712 713 error = WriteGPR(); 714 if (error.Fail()) 715 return error; 716 src += GetRegisterInfoInterface().GetGPRSize(); 717 718 return error; 719 } 720 721 Status NativeRegisterContextNetBSD_x86_64::IsWatchpointHit(uint32_t wp_index, 722 bool &is_hit) { 723 if (wp_index >= NumSupportedHardwareWatchpoints()) 724 return Status("Watchpoint index out of range"); 725 726 RegisterValue reg_value; 727 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr6_x86_64); 728 Status error = ReadRegister(reg_info, reg_value); 729 if (error.Fail()) { 730 is_hit = false; 731 return error; 732 } 733 734 uint64_t status_bits = reg_value.GetAsUInt64(); 735 736 is_hit = status_bits & (1 << wp_index); 737 738 return error; 739 } 740 741 Status NativeRegisterContextNetBSD_x86_64::GetWatchpointHitIndex( 742 uint32_t &wp_index, lldb::addr_t trap_addr) { 743 uint32_t num_hw_wps = NumSupportedHardwareWatchpoints(); 744 for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) { 745 bool is_hit; 746 Status error = IsWatchpointHit(wp_index, is_hit); 747 if (error.Fail()) { 748 wp_index = LLDB_INVALID_INDEX32; 749 return error; 750 } else if (is_hit) { 751 return error; 752 } 753 } 754 wp_index = LLDB_INVALID_INDEX32; 755 return Status(); 756 } 757 758 Status NativeRegisterContextNetBSD_x86_64::IsWatchpointVacant(uint32_t wp_index, 759 bool &is_vacant) { 760 if (wp_index >= NumSupportedHardwareWatchpoints()) 761 return Status("Watchpoint index out of range"); 762 763 RegisterValue reg_value; 764 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr7_x86_64); 765 Status error = ReadRegister(reg_info, reg_value); 766 if (error.Fail()) { 767 is_vacant = false; 768 return error; 769 } 770 771 uint64_t control_bits = reg_value.GetAsUInt64(); 772 773 is_vacant = !(control_bits & (1 << (2 * wp_index))); 774 775 return error; 776 } 777 778 Status NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( 779 lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) { 780 781 if (wp_index >= NumSupportedHardwareWatchpoints()) 782 return Status("Watchpoint index out of range"); 783 784 // Read only watchpoints aren't supported on x86_64. Fall back to read/write 785 // waitchpoints instead. 786 // TODO: Add logic to detect when a write happens and ignore that watchpoint 787 // hit. 788 if (watch_flags == 0x2) 789 watch_flags = 0x3; 790 791 if (watch_flags != 0x1 && watch_flags != 0x3) 792 return Status("Invalid read/write bits for watchpoint"); 793 794 if (size != 1 && size != 2 && size != 4 && size != 8) 795 return Status("Invalid size for watchpoint"); 796 797 bool is_vacant; 798 Status error = IsWatchpointVacant(wp_index, is_vacant); 799 if (error.Fail()) 800 return error; 801 if (!is_vacant) 802 return Status("Watchpoint index not vacant"); 803 804 RegisterValue reg_value; 805 const RegisterInfo *const reg_info_dr7 = 806 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 807 error = ReadRegister(reg_info_dr7, reg_value); 808 if (error.Fail()) 809 return error; 810 811 // for watchpoints 0, 1, 2, or 3, respectively, 812 // set bits 1, 3, 5, or 7 813 uint64_t enable_bit = 1 << (2 * wp_index); 814 815 // set bits 16-17, 20-21, 24-25, or 28-29 816 // with 0b01 for write, and 0b11 for read/write 817 uint64_t rw_bits = watch_flags << (16 + 4 * wp_index); 818 819 // set bits 18-19, 22-23, 26-27, or 30-31 820 // with 0b00, 0b01, 0b10, or 0b11 821 // for 1, 2, 8 (if supported), or 4 bytes, respectively 822 uint64_t size_bits = (size == 8 ? 0x2 : size - 1) << (18 + 4 * wp_index); 823 824 uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); 825 826 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 827 828 control_bits |= enable_bit | rw_bits | size_bits; 829 830 const RegisterInfo *const reg_info_drN = 831 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 832 error = WriteRegister(reg_info_drN, RegisterValue(addr)); 833 if (error.Fail()) 834 return error; 835 836 error = WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 837 if (error.Fail()) 838 return error; 839 840 error.Clear(); 841 return error; 842 } 843 844 bool NativeRegisterContextNetBSD_x86_64::ClearHardwareWatchpoint( 845 uint32_t wp_index) { 846 if (wp_index >= NumSupportedHardwareWatchpoints()) 847 return false; 848 849 RegisterValue reg_value; 850 851 // for watchpoints 0, 1, 2, or 3, respectively, 852 // clear bits 0, 1, 2, or 3 of the debug status register (DR6) 853 const RegisterInfo *const reg_info_dr6 = 854 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 855 Status error = ReadRegister(reg_info_dr6, reg_value); 856 if (error.Fail()) 857 return false; 858 uint64_t bit_mask = 1 << wp_index; 859 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 860 error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 861 if (error.Fail()) 862 return false; 863 864 // for watchpoints 0, 1, 2, or 3, respectively, 865 // clear bits {0-1,16-19}, {2-3,20-23}, {4-5,24-27}, or {6-7,28-31} 866 // of the debug control register (DR7) 867 const RegisterInfo *const reg_info_dr7 = 868 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 869 error = ReadRegister(reg_info_dr7, reg_value); 870 if (error.Fail()) 871 return false; 872 bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); 873 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 874 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); 875 } 876 877 Status NativeRegisterContextNetBSD_x86_64::ClearAllHardwareWatchpoints() { 878 RegisterValue reg_value; 879 880 // clear bits {0-4} of the debug status register (DR6) 881 const RegisterInfo *const reg_info_dr6 = 882 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 883 Status error = ReadRegister(reg_info_dr6, reg_value); 884 if (error.Fail()) 885 return error; 886 uint64_t bit_mask = 0xF; 887 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 888 error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 889 if (error.Fail()) 890 return error; 891 892 // clear bits {0-7,16-31} of the debug control register (DR7) 893 const RegisterInfo *const reg_info_dr7 = 894 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 895 error = ReadRegister(reg_info_dr7, reg_value); 896 if (error.Fail()) 897 return error; 898 bit_mask = 0xFF | (0xFFFF << 16); 899 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 900 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 901 } 902 903 uint32_t NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpoint( 904 lldb::addr_t addr, size_t size, uint32_t watch_flags) { 905 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); 906 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); 907 for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) { 908 bool is_vacant; 909 Status error = IsWatchpointVacant(wp_index, is_vacant); 910 if (is_vacant) { 911 error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index); 912 if (error.Success()) 913 return wp_index; 914 } 915 if (error.Fail() && log) { 916 log->Printf("NativeRegisterContextNetBSD_x86_64::%s Error: %s", 917 __FUNCTION__, error.AsCString()); 918 } 919 } 920 return LLDB_INVALID_INDEX32; 921 } 922 923 lldb::addr_t 924 NativeRegisterContextNetBSD_x86_64::GetWatchpointAddress(uint32_t wp_index) { 925 if (wp_index >= NumSupportedHardwareWatchpoints()) 926 return LLDB_INVALID_ADDRESS; 927 RegisterValue reg_value; 928 const RegisterInfo *const reg_info_drN = 929 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 930 if (ReadRegister(reg_info_drN, reg_value).Fail()) 931 return LLDB_INVALID_ADDRESS; 932 return reg_value.GetAsUInt64(); 933 } 934 935 uint32_t NativeRegisterContextNetBSD_x86_64::NumSupportedHardwareWatchpoints() { 936 // Available debug address registers: dr0, dr1, dr2, dr3 937 return 4; 938 } 939 940 #endif // defined(__x86_64__) 941