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/Error.h" 18 #include "lldb/Utility/Log.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 Error NativeRegisterContextNetBSD_x86_64::ReadRegister( 255 const RegisterInfo *reg_info, RegisterValue ®_value) { 256 Error error; 257 258 if (!reg_info) { 259 error.SetErrorString("reg_info NULL"); 260 return error; 261 } 262 263 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 264 if (reg == LLDB_INVALID_REGNUM) { 265 // This is likely an internal register for lldb use only and should not be 266 // directly queried. 267 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 268 "register, cannot read directly", 269 reg_info->name); 270 return error; 271 } 272 273 int set = GetSetForNativeRegNum(reg); 274 if (set == -1) { 275 // This is likely an internal register for lldb use only and should not be 276 // directly queried. 277 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 278 reg_info->name); 279 return error; 280 } 281 282 if (ReadRegisterSet(set) != 0) { 283 // This is likely an internal register for lldb use only and should not be 284 // directly queried. 285 error.SetErrorStringWithFormat( 286 "reading register set for register \"%s\" failed", reg_info->name); 287 return error; 288 } 289 290 switch (reg) { 291 case lldb_rax_x86_64: 292 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RAX]; 293 break; 294 case lldb_rbx_x86_64: 295 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBX]; 296 break; 297 case lldb_rcx_x86_64: 298 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RCX]; 299 break; 300 case lldb_rdx_x86_64: 301 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDX]; 302 break; 303 case lldb_rdi_x86_64: 304 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDI]; 305 break; 306 case lldb_rsi_x86_64: 307 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSI]; 308 break; 309 case lldb_rbp_x86_64: 310 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBP]; 311 break; 312 case lldb_rsp_x86_64: 313 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSP]; 314 break; 315 case lldb_r8_x86_64: 316 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R8]; 317 break; 318 case lldb_r9_x86_64: 319 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R9]; 320 break; 321 case lldb_r10_x86_64: 322 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R10]; 323 break; 324 case lldb_r11_x86_64: 325 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R11]; 326 break; 327 case lldb_r12_x86_64: 328 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R12]; 329 break; 330 case lldb_r13_x86_64: 331 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R13]; 332 break; 333 case lldb_r14_x86_64: 334 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R14]; 335 break; 336 case lldb_r15_x86_64: 337 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R15]; 338 break; 339 case lldb_rip_x86_64: 340 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RIP]; 341 break; 342 case lldb_rflags_x86_64: 343 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RFLAGS]; 344 break; 345 case lldb_cs_x86_64: 346 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_CS]; 347 break; 348 case lldb_fs_x86_64: 349 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_FS]; 350 break; 351 case lldb_gs_x86_64: 352 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_GS]; 353 break; 354 case lldb_ss_x86_64: 355 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_SS]; 356 break; 357 case lldb_ds_x86_64: 358 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_DS]; 359 break; 360 case lldb_es_x86_64: 361 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_ES]; 362 break; 363 case lldb_fctrl_x86_64: 364 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_cw; 365 break; 366 case lldb_fstat_x86_64: 367 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_sw; 368 break; 369 case lldb_ftag_x86_64: 370 reg_value = (uint8_t)m_fpr_x86_64.fxstate.fx_tw; 371 break; 372 case lldb_fop_x86_64: 373 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_opcode; 374 break; 375 case lldb_fiseg_x86_64: 376 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_ip.fa_64; 377 break; 378 case lldb_fioff_x86_64: 379 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off; 380 break; 381 case lldb_foseg_x86_64: 382 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_dp.fa_64; 383 break; 384 case lldb_fooff_x86_64: 385 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off; 386 break; 387 case lldb_mxcsr_x86_64: 388 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr; 389 break; 390 case lldb_mxcsrmask_x86_64: 391 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr_mask; 392 break; 393 case lldb_st0_x86_64: 394 case lldb_st1_x86_64: 395 case lldb_st2_x86_64: 396 case lldb_st3_x86_64: 397 case lldb_st4_x86_64: 398 case lldb_st5_x86_64: 399 case lldb_st6_x86_64: 400 case lldb_st7_x86_64: 401 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 402 reg_info->byte_size, endian::InlHostByteOrder()); 403 break; 404 case lldb_mm0_x86_64: 405 case lldb_mm1_x86_64: 406 case lldb_mm2_x86_64: 407 case lldb_mm3_x86_64: 408 case lldb_mm4_x86_64: 409 case lldb_mm5_x86_64: 410 case lldb_mm6_x86_64: 411 case lldb_mm7_x86_64: 412 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], 413 reg_info->byte_size, endian::InlHostByteOrder()); 414 break; 415 case lldb_xmm0_x86_64: 416 case lldb_xmm1_x86_64: 417 case lldb_xmm2_x86_64: 418 case lldb_xmm3_x86_64: 419 case lldb_xmm4_x86_64: 420 case lldb_xmm5_x86_64: 421 case lldb_xmm6_x86_64: 422 case lldb_xmm7_x86_64: 423 case lldb_xmm8_x86_64: 424 case lldb_xmm9_x86_64: 425 case lldb_xmm10_x86_64: 426 case lldb_xmm11_x86_64: 427 case lldb_xmm12_x86_64: 428 case lldb_xmm13_x86_64: 429 case lldb_xmm14_x86_64: 430 case lldb_xmm15_x86_64: 431 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 432 reg_info->byte_size, endian::InlHostByteOrder()); 433 break; 434 case lldb_dr0_x86_64: 435 case lldb_dr1_x86_64: 436 case lldb_dr2_x86_64: 437 case lldb_dr3_x86_64: 438 case lldb_dr4_x86_64: 439 case lldb_dr5_x86_64: 440 case lldb_dr6_x86_64: 441 case lldb_dr7_x86_64: 442 reg_value = (uint64_t)m_dbr_x86_64.dr[reg - lldb_dr0_x86_64]; 443 break; 444 } 445 446 return error; 447 } 448 449 Error NativeRegisterContextNetBSD_x86_64::WriteRegister( 450 const RegisterInfo *reg_info, const RegisterValue ®_value) { 451 452 Error error; 453 454 if (!reg_info) { 455 error.SetErrorString("reg_info NULL"); 456 return error; 457 } 458 459 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 460 if (reg == LLDB_INVALID_REGNUM) { 461 // This is likely an internal register for lldb use only and should not be 462 // directly queried. 463 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 464 "register, cannot read directly", 465 reg_info->name); 466 return error; 467 } 468 469 int set = GetSetForNativeRegNum(reg); 470 if (set == -1) { 471 // This is likely an internal register for lldb use only and should not be 472 // directly queried. 473 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 474 reg_info->name); 475 return error; 476 } 477 478 if (ReadRegisterSet(set) != 0) { 479 // This is likely an internal register for lldb use only and should not be 480 // directly queried. 481 error.SetErrorStringWithFormat( 482 "reading register set for register \"%s\" failed", reg_info->name); 483 return error; 484 } 485 486 switch (reg) { 487 case lldb_rax_x86_64: 488 m_gpr_x86_64.regs[_REG_RAX] = reg_value.GetAsUInt64(); 489 break; 490 case lldb_rbx_x86_64: 491 m_gpr_x86_64.regs[_REG_RBX] = reg_value.GetAsUInt64(); 492 break; 493 case lldb_rcx_x86_64: 494 m_gpr_x86_64.regs[_REG_RCX] = reg_value.GetAsUInt64(); 495 break; 496 case lldb_rdx_x86_64: 497 m_gpr_x86_64.regs[_REG_RDX] = reg_value.GetAsUInt64(); 498 break; 499 case lldb_rdi_x86_64: 500 m_gpr_x86_64.regs[_REG_RDI] = reg_value.GetAsUInt64(); 501 break; 502 case lldb_rsi_x86_64: 503 m_gpr_x86_64.regs[_REG_RSI] = reg_value.GetAsUInt64(); 504 break; 505 case lldb_rbp_x86_64: 506 m_gpr_x86_64.regs[_REG_RBP] = reg_value.GetAsUInt64(); 507 break; 508 case lldb_rsp_x86_64: 509 m_gpr_x86_64.regs[_REG_RSP] = reg_value.GetAsUInt64(); 510 break; 511 case lldb_r8_x86_64: 512 m_gpr_x86_64.regs[_REG_R8] = reg_value.GetAsUInt64(); 513 break; 514 case lldb_r9_x86_64: 515 m_gpr_x86_64.regs[_REG_R9] = reg_value.GetAsUInt64(); 516 break; 517 case lldb_r10_x86_64: 518 m_gpr_x86_64.regs[_REG_R10] = reg_value.GetAsUInt64(); 519 break; 520 case lldb_r11_x86_64: 521 m_gpr_x86_64.regs[_REG_R11] = reg_value.GetAsUInt64(); 522 break; 523 case lldb_r12_x86_64: 524 m_gpr_x86_64.regs[_REG_R12] = reg_value.GetAsUInt64(); 525 break; 526 case lldb_r13_x86_64: 527 m_gpr_x86_64.regs[_REG_R13] = reg_value.GetAsUInt64(); 528 break; 529 case lldb_r14_x86_64: 530 m_gpr_x86_64.regs[_REG_R14] = reg_value.GetAsUInt64(); 531 break; 532 case lldb_r15_x86_64: 533 m_gpr_x86_64.regs[_REG_R15] = reg_value.GetAsUInt64(); 534 break; 535 case lldb_rip_x86_64: 536 m_gpr_x86_64.regs[_REG_RIP] = reg_value.GetAsUInt64(); 537 break; 538 case lldb_rflags_x86_64: 539 m_gpr_x86_64.regs[_REG_RFLAGS] = reg_value.GetAsUInt64(); 540 break; 541 case lldb_cs_x86_64: 542 m_gpr_x86_64.regs[_REG_CS] = reg_value.GetAsUInt64(); 543 break; 544 case lldb_fs_x86_64: 545 m_gpr_x86_64.regs[_REG_FS] = reg_value.GetAsUInt64(); 546 break; 547 case lldb_gs_x86_64: 548 m_gpr_x86_64.regs[_REG_GS] = reg_value.GetAsUInt64(); 549 break; 550 case lldb_ss_x86_64: 551 m_gpr_x86_64.regs[_REG_SS] = reg_value.GetAsUInt64(); 552 break; 553 case lldb_ds_x86_64: 554 m_gpr_x86_64.regs[_REG_DS] = reg_value.GetAsUInt64(); 555 break; 556 case lldb_es_x86_64: 557 m_gpr_x86_64.regs[_REG_ES] = reg_value.GetAsUInt64(); 558 break; 559 case lldb_fctrl_x86_64: 560 m_fpr_x86_64.fxstate.fx_cw = reg_value.GetAsUInt16(); 561 break; 562 case lldb_fstat_x86_64: 563 m_fpr_x86_64.fxstate.fx_sw = reg_value.GetAsUInt16(); 564 break; 565 case lldb_ftag_x86_64: 566 m_fpr_x86_64.fxstate.fx_tw = reg_value.GetAsUInt8(); 567 break; 568 case lldb_fop_x86_64: 569 m_fpr_x86_64.fxstate.fx_opcode = reg_value.GetAsUInt16(); 570 break; 571 case lldb_fiseg_x86_64: 572 m_fpr_x86_64.fxstate.fx_ip.fa_64 = reg_value.GetAsUInt64(); 573 break; 574 case lldb_fioff_x86_64: 575 m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off = reg_value.GetAsUInt32(); 576 break; 577 case lldb_foseg_x86_64: 578 m_fpr_x86_64.fxstate.fx_dp.fa_64 = reg_value.GetAsUInt64(); 579 break; 580 case lldb_fooff_x86_64: 581 m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off = reg_value.GetAsUInt32(); 582 break; 583 case lldb_mxcsr_x86_64: 584 m_fpr_x86_64.fxstate.fx_mxcsr = reg_value.GetAsUInt32(); 585 break; 586 case lldb_mxcsrmask_x86_64: 587 m_fpr_x86_64.fxstate.fx_mxcsr_mask = reg_value.GetAsUInt32(); 588 break; 589 case lldb_st0_x86_64: 590 case lldb_st1_x86_64: 591 case lldb_st2_x86_64: 592 case lldb_st3_x86_64: 593 case lldb_st4_x86_64: 594 case lldb_st5_x86_64: 595 case lldb_st6_x86_64: 596 case lldb_st7_x86_64: 597 ::memcpy(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 598 reg_value.GetBytes(), reg_value.GetByteSize()); 599 break; 600 case lldb_mm0_x86_64: 601 case lldb_mm1_x86_64: 602 case lldb_mm2_x86_64: 603 case lldb_mm3_x86_64: 604 case lldb_mm4_x86_64: 605 case lldb_mm5_x86_64: 606 case lldb_mm6_x86_64: 607 case lldb_mm7_x86_64: 608 ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], 609 reg_value.GetBytes(), reg_value.GetByteSize()); 610 break; 611 case lldb_xmm0_x86_64: 612 case lldb_xmm1_x86_64: 613 case lldb_xmm2_x86_64: 614 case lldb_xmm3_x86_64: 615 case lldb_xmm4_x86_64: 616 case lldb_xmm5_x86_64: 617 case lldb_xmm6_x86_64: 618 case lldb_xmm7_x86_64: 619 case lldb_xmm8_x86_64: 620 case lldb_xmm9_x86_64: 621 case lldb_xmm10_x86_64: 622 case lldb_xmm11_x86_64: 623 case lldb_xmm12_x86_64: 624 case lldb_xmm13_x86_64: 625 case lldb_xmm14_x86_64: 626 case lldb_xmm15_x86_64: 627 ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 628 reg_value.GetBytes(), reg_value.GetByteSize()); 629 break; 630 case lldb_dr0_x86_64: 631 case lldb_dr1_x86_64: 632 case lldb_dr2_x86_64: 633 case lldb_dr3_x86_64: 634 case lldb_dr4_x86_64: 635 case lldb_dr5_x86_64: 636 case lldb_dr6_x86_64: 637 case lldb_dr7_x86_64: 638 m_dbr_x86_64.dr[reg - lldb_dr0_x86_64] = reg_value.GetAsUInt64(); 639 break; 640 } 641 642 if (WriteRegisterSet(set) != 0) 643 error.SetErrorStringWithFormat("failed to write register set"); 644 645 return error; 646 } 647 648 Error NativeRegisterContextNetBSD_x86_64::ReadAllRegisterValues( 649 lldb::DataBufferSP &data_sp) { 650 Error error; 651 652 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); 653 if (!data_sp) { 654 error.SetErrorStringWithFormat( 655 "failed to allocate DataBufferHeap instance of size %" PRIu64, 656 REG_CONTEXT_SIZE); 657 return error; 658 } 659 660 error = ReadGPR(); 661 if (error.Fail()) 662 return error; 663 664 uint8_t *dst = data_sp->GetBytes(); 665 if (dst == nullptr) { 666 error.SetErrorStringWithFormat("DataBufferHeap instance of size %" PRIu64 667 " returned a null pointer", 668 REG_CONTEXT_SIZE); 669 return error; 670 } 671 672 ::memcpy(dst, &m_gpr_x86_64, GetRegisterInfoInterface().GetGPRSize()); 673 dst += GetRegisterInfoInterface().GetGPRSize(); 674 675 RegisterValue value((uint64_t)-1); 676 const RegisterInfo *reg_info = 677 GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_eax"); 678 if (reg_info == nullptr) 679 reg_info = GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_rax"); 680 return error; 681 } 682 683 Error NativeRegisterContextNetBSD_x86_64::WriteAllRegisterValues( 684 const lldb::DataBufferSP &data_sp) { 685 Error error; 686 687 if (!data_sp) { 688 error.SetErrorStringWithFormat( 689 "NativeRegisterContextNetBSD_x86_64::%s invalid data_sp provided", 690 __FUNCTION__); 691 return error; 692 } 693 694 if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { 695 error.SetErrorStringWithFormat( 696 "NativeRegisterContextNetBSD_x86_64::%s data_sp contained mismatched " 697 "data size, expected %" PRIu64 ", actual %" PRIu64, 698 __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); 699 return error; 700 } 701 702 uint8_t *src = data_sp->GetBytes(); 703 if (src == nullptr) { 704 error.SetErrorStringWithFormat("NativeRegisterContextNetBSD_x86_64::%s " 705 "DataBuffer::GetBytes() returned a null " 706 "pointer", 707 __FUNCTION__); 708 return error; 709 } 710 ::memcpy(&m_gpr_x86_64, src, GetRegisterInfoInterface().GetGPRSize()); 711 712 error = WriteGPR(); 713 if (error.Fail()) 714 return error; 715 src += GetRegisterInfoInterface().GetGPRSize(); 716 717 return error; 718 } 719 720 Error NativeRegisterContextNetBSD_x86_64::IsWatchpointHit(uint32_t wp_index, 721 bool &is_hit) { 722 if (wp_index >= NumSupportedHardwareWatchpoints()) 723 return Error("Watchpoint index out of range"); 724 725 RegisterValue reg_value; 726 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr6_x86_64); 727 Error error = ReadRegister(reg_info, reg_value); 728 if (error.Fail()) { 729 is_hit = false; 730 return error; 731 } 732 733 uint64_t status_bits = reg_value.GetAsUInt64(); 734 735 is_hit = status_bits & (1 << wp_index); 736 737 return error; 738 } 739 740 Error NativeRegisterContextNetBSD_x86_64::GetWatchpointHitIndex( 741 uint32_t &wp_index, lldb::addr_t trap_addr) { 742 uint32_t num_hw_wps = NumSupportedHardwareWatchpoints(); 743 for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) { 744 bool is_hit; 745 Error error = IsWatchpointHit(wp_index, is_hit); 746 if (error.Fail()) { 747 wp_index = LLDB_INVALID_INDEX32; 748 return error; 749 } else if (is_hit) { 750 return error; 751 } 752 } 753 wp_index = LLDB_INVALID_INDEX32; 754 return Error(); 755 } 756 757 Error NativeRegisterContextNetBSD_x86_64::IsWatchpointVacant(uint32_t wp_index, 758 bool &is_vacant) { 759 if (wp_index >= NumSupportedHardwareWatchpoints()) 760 return Error("Watchpoint index out of range"); 761 762 RegisterValue reg_value; 763 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr7_x86_64); 764 Error error = ReadRegister(reg_info, reg_value); 765 if (error.Fail()) { 766 is_vacant = false; 767 return error; 768 } 769 770 uint64_t control_bits = reg_value.GetAsUInt64(); 771 772 is_vacant = !(control_bits & (1 << (2 * wp_index))); 773 774 return error; 775 } 776 777 Error NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( 778 lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) { 779 780 if (wp_index >= NumSupportedHardwareWatchpoints()) 781 return Error("Watchpoint index out of range"); 782 783 // Read only watchpoints aren't supported on x86_64. Fall back to read/write 784 // waitchpoints instead. 785 // TODO: Add logic to detect when a write happens and ignore that watchpoint 786 // hit. 787 if (watch_flags == 0x2) 788 watch_flags = 0x3; 789 790 if (watch_flags != 0x1 && watch_flags != 0x3) 791 return Error("Invalid read/write bits for watchpoint"); 792 793 if (size != 1 && size != 2 && size != 4 && size != 8) 794 return Error("Invalid size for watchpoint"); 795 796 bool is_vacant; 797 Error error = IsWatchpointVacant(wp_index, is_vacant); 798 if (error.Fail()) 799 return error; 800 if (!is_vacant) 801 return Error("Watchpoint index not vacant"); 802 803 RegisterValue reg_value; 804 const RegisterInfo *const reg_info_dr7 = 805 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 806 error = ReadRegister(reg_info_dr7, reg_value); 807 if (error.Fail()) 808 return error; 809 810 // for watchpoints 0, 1, 2, or 3, respectively, 811 // set bits 1, 3, 5, or 7 812 uint64_t enable_bit = 1 << (2 * wp_index); 813 814 // set bits 16-17, 20-21, 24-25, or 28-29 815 // with 0b01 for write, and 0b11 for read/write 816 uint64_t rw_bits = watch_flags << (16 + 4 * wp_index); 817 818 // set bits 18-19, 22-23, 26-27, or 30-31 819 // with 0b00, 0b01, 0b10, or 0b11 820 // for 1, 2, 8 (if supported), or 4 bytes, respectively 821 uint64_t size_bits = (size == 8 ? 0x2 : size - 1) << (18 + 4 * wp_index); 822 823 uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); 824 825 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 826 827 control_bits |= enable_bit | rw_bits | size_bits; 828 829 const RegisterInfo *const reg_info_drN = 830 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 831 error = WriteRegister(reg_info_drN, RegisterValue(addr)); 832 if (error.Fail()) 833 return error; 834 835 error = WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 836 if (error.Fail()) 837 return error; 838 839 error.Clear(); 840 return error; 841 } 842 843 bool NativeRegisterContextNetBSD_x86_64::ClearHardwareWatchpoint( 844 uint32_t wp_index) { 845 if (wp_index >= NumSupportedHardwareWatchpoints()) 846 return false; 847 848 RegisterValue reg_value; 849 850 // for watchpoints 0, 1, 2, or 3, respectively, 851 // clear bits 0, 1, 2, or 3 of the debug status register (DR6) 852 const RegisterInfo *const reg_info_dr6 = 853 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 854 Error error = ReadRegister(reg_info_dr6, reg_value); 855 if (error.Fail()) 856 return false; 857 uint64_t bit_mask = 1 << wp_index; 858 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 859 error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 860 if (error.Fail()) 861 return false; 862 863 // for watchpoints 0, 1, 2, or 3, respectively, 864 // clear bits {0-1,16-19}, {2-3,20-23}, {4-5,24-27}, or {6-7,28-31} 865 // of the debug control register (DR7) 866 const RegisterInfo *const reg_info_dr7 = 867 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 868 error = ReadRegister(reg_info_dr7, reg_value); 869 if (error.Fail()) 870 return false; 871 bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); 872 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 873 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); 874 } 875 876 Error NativeRegisterContextNetBSD_x86_64::ClearAllHardwareWatchpoints() { 877 RegisterValue reg_value; 878 879 // clear bits {0-4} of the debug status register (DR6) 880 const RegisterInfo *const reg_info_dr6 = 881 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 882 Error error = ReadRegister(reg_info_dr6, reg_value); 883 if (error.Fail()) 884 return error; 885 uint64_t bit_mask = 0xF; 886 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 887 error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 888 if (error.Fail()) 889 return error; 890 891 // clear bits {0-7,16-31} of the debug control register (DR7) 892 const RegisterInfo *const reg_info_dr7 = 893 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 894 error = ReadRegister(reg_info_dr7, reg_value); 895 if (error.Fail()) 896 return error; 897 bit_mask = 0xFF | (0xFFFF << 16); 898 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 899 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 900 } 901 902 uint32_t NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpoint( 903 lldb::addr_t addr, size_t size, uint32_t watch_flags) { 904 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); 905 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); 906 for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) { 907 bool is_vacant; 908 Error error = IsWatchpointVacant(wp_index, is_vacant); 909 if (is_vacant) { 910 error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index); 911 if (error.Success()) 912 return wp_index; 913 } 914 if (error.Fail() && log) { 915 log->Printf("NativeRegisterContextNetBSD_x86_64::%s Error: %s", 916 __FUNCTION__, error.AsCString()); 917 } 918 } 919 return LLDB_INVALID_INDEX32; 920 } 921 922 lldb::addr_t 923 NativeRegisterContextNetBSD_x86_64::GetWatchpointAddress(uint32_t wp_index) { 924 if (wp_index >= NumSupportedHardwareWatchpoints()) 925 return LLDB_INVALID_ADDRESS; 926 RegisterValue reg_value; 927 const RegisterInfo *const reg_info_drN = 928 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 929 if (ReadRegister(reg_info_drN, reg_value).Fail()) 930 return LLDB_INVALID_ADDRESS; 931 return reg_value.GetAsUInt64(); 932 } 933 934 uint32_t NativeRegisterContextNetBSD_x86_64::NumSupportedHardwareWatchpoints() { 935 // Available debug address registers: dr0, dr1, dr2, dr3 936 return 4; 937 } 938 939 #endif // defined(__x86_64__) 940