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