NativeRegisterContextNetBSD_x86_64.cpp revision 360784
1//===-- NativeRegisterContextNetBSD_x86_64.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#if defined(__x86_64__) 10 11#include "NativeRegisterContextNetBSD_x86_64.h" 12 13#include "lldb/Host/HostInfo.h" 14#include "lldb/Utility/DataBufferHeap.h" 15#include "lldb/Utility/Log.h" 16#include "lldb/Utility/RegisterValue.h" 17#include "lldb/Utility/Status.h" 18 19#include "Plugins/Process/Utility/RegisterContextNetBSD_x86_64.h" 20 21// clang-format off 22#include <sys/types.h> 23#include <sys/ptrace.h> 24#include <sys/sysctl.h> 25#include <sys/uio.h> 26#include <x86/cpu.h> 27#include <x86/cpu_extended_state.h> 28#include <x86/specialreg.h> 29#include <elf.h> 30#include <err.h> 31#include <stdint.h> 32#include <stdlib.h> 33// clang-format on 34 35using namespace lldb_private; 36using namespace lldb_private::process_netbsd; 37 38// Private namespace. 39 40namespace { 41// x86 64-bit general purpose registers. 42static const uint32_t g_gpr_regnums_x86_64[] = { 43 lldb_rax_x86_64, lldb_rbx_x86_64, lldb_rcx_x86_64, lldb_rdx_x86_64, 44 lldb_rdi_x86_64, lldb_rsi_x86_64, lldb_rbp_x86_64, lldb_rsp_x86_64, 45 lldb_r8_x86_64, lldb_r9_x86_64, lldb_r10_x86_64, lldb_r11_x86_64, 46 lldb_r12_x86_64, lldb_r13_x86_64, lldb_r14_x86_64, lldb_r15_x86_64, 47 lldb_rip_x86_64, lldb_rflags_x86_64, lldb_cs_x86_64, lldb_fs_x86_64, 48 lldb_gs_x86_64, lldb_ss_x86_64, lldb_ds_x86_64, lldb_es_x86_64, 49 lldb_eax_x86_64, lldb_ebx_x86_64, lldb_ecx_x86_64, lldb_edx_x86_64, 50 lldb_edi_x86_64, lldb_esi_x86_64, lldb_ebp_x86_64, lldb_esp_x86_64, 51 lldb_r8d_x86_64, // Low 32 bits or r8 52 lldb_r9d_x86_64, // Low 32 bits or r9 53 lldb_r10d_x86_64, // Low 32 bits or r10 54 lldb_r11d_x86_64, // Low 32 bits or r11 55 lldb_r12d_x86_64, // Low 32 bits or r12 56 lldb_r13d_x86_64, // Low 32 bits or r13 57 lldb_r14d_x86_64, // Low 32 bits or r14 58 lldb_r15d_x86_64, // Low 32 bits or r15 59 lldb_ax_x86_64, lldb_bx_x86_64, lldb_cx_x86_64, lldb_dx_x86_64, 60 lldb_di_x86_64, lldb_si_x86_64, lldb_bp_x86_64, lldb_sp_x86_64, 61 lldb_r8w_x86_64, // Low 16 bits or r8 62 lldb_r9w_x86_64, // Low 16 bits or r9 63 lldb_r10w_x86_64, // Low 16 bits or r10 64 lldb_r11w_x86_64, // Low 16 bits or r11 65 lldb_r12w_x86_64, // Low 16 bits or r12 66 lldb_r13w_x86_64, // Low 16 bits or r13 67 lldb_r14w_x86_64, // Low 16 bits or r14 68 lldb_r15w_x86_64, // Low 16 bits or r15 69 lldb_ah_x86_64, lldb_bh_x86_64, lldb_ch_x86_64, lldb_dh_x86_64, 70 lldb_al_x86_64, lldb_bl_x86_64, lldb_cl_x86_64, lldb_dl_x86_64, 71 lldb_dil_x86_64, lldb_sil_x86_64, lldb_bpl_x86_64, lldb_spl_x86_64, 72 lldb_r8l_x86_64, // Low 8 bits or r8 73 lldb_r9l_x86_64, // Low 8 bits or r9 74 lldb_r10l_x86_64, // Low 8 bits or r10 75 lldb_r11l_x86_64, // Low 8 bits or r11 76 lldb_r12l_x86_64, // Low 8 bits or r12 77 lldb_r13l_x86_64, // Low 8 bits or r13 78 lldb_r14l_x86_64, // Low 8 bits or r14 79 lldb_r15l_x86_64, // Low 8 bits or r15 80 LLDB_INVALID_REGNUM // register sets need to end with this flag 81}; 82static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 83 1 == 84 k_num_gpr_registers_x86_64, 85 "g_gpr_regnums_x86_64 has wrong number of register infos"); 86 87// x86 64-bit floating point registers. 88static const uint32_t g_fpu_regnums_x86_64[] = { 89 lldb_fctrl_x86_64, lldb_fstat_x86_64, lldb_ftag_x86_64, 90 lldb_fop_x86_64, lldb_fiseg_x86_64, lldb_fioff_x86_64, 91 lldb_foseg_x86_64, lldb_fooff_x86_64, lldb_mxcsr_x86_64, 92 lldb_mxcsrmask_x86_64, lldb_st0_x86_64, lldb_st1_x86_64, 93 lldb_st2_x86_64, lldb_st3_x86_64, lldb_st4_x86_64, 94 lldb_st5_x86_64, lldb_st6_x86_64, lldb_st7_x86_64, 95 lldb_mm0_x86_64, lldb_mm1_x86_64, lldb_mm2_x86_64, 96 lldb_mm3_x86_64, lldb_mm4_x86_64, lldb_mm5_x86_64, 97 lldb_mm6_x86_64, lldb_mm7_x86_64, lldb_xmm0_x86_64, 98 lldb_xmm1_x86_64, lldb_xmm2_x86_64, lldb_xmm3_x86_64, 99 lldb_xmm4_x86_64, lldb_xmm5_x86_64, lldb_xmm6_x86_64, 100 lldb_xmm7_x86_64, lldb_xmm8_x86_64, lldb_xmm9_x86_64, 101 lldb_xmm10_x86_64, lldb_xmm11_x86_64, lldb_xmm12_x86_64, 102 lldb_xmm13_x86_64, lldb_xmm14_x86_64, lldb_xmm15_x86_64, 103 LLDB_INVALID_REGNUM // register sets need to end with this flag 104}; 105static_assert((sizeof(g_fpu_regnums_x86_64) / sizeof(g_fpu_regnums_x86_64[0])) - 106 1 == 107 k_num_fpr_registers_x86_64, 108 "g_fpu_regnums_x86_64 has wrong number of register infos"); 109 110// x86 64-bit registers available via XState. 111static const uint32_t g_xstate_regnums_x86_64[] = { 112 lldb_ymm0_x86_64, lldb_ymm1_x86_64, lldb_ymm2_x86_64, lldb_ymm3_x86_64, 113 lldb_ymm4_x86_64, lldb_ymm5_x86_64, lldb_ymm6_x86_64, lldb_ymm7_x86_64, 114 lldb_ymm8_x86_64, lldb_ymm9_x86_64, lldb_ymm10_x86_64, lldb_ymm11_x86_64, 115 lldb_ymm12_x86_64, lldb_ymm13_x86_64, lldb_ymm14_x86_64, lldb_ymm15_x86_64, 116 // Note: we currently do not provide them but this is needed to avoid 117 // unnamed groups in SBFrame::GetRegisterContext(). 118 lldb_bnd0_x86_64, lldb_bnd1_x86_64, lldb_bnd2_x86_64, 119 lldb_bnd3_x86_64, lldb_bndcfgu_x86_64, lldb_bndstatus_x86_64, 120 LLDB_INVALID_REGNUM // register sets need to end with this flag 121}; 122static_assert((sizeof(g_xstate_regnums_x86_64) / sizeof(g_xstate_regnums_x86_64[0])) - 123 1 == 124 k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, 125 "g_xstate_regnums_x86_64 has wrong number of register infos"); 126 127// x86 debug registers. 128static const uint32_t g_dbr_regnums_x86_64[] = { 129 lldb_dr0_x86_64, lldb_dr1_x86_64, lldb_dr2_x86_64, lldb_dr3_x86_64, 130 lldb_dr4_x86_64, lldb_dr5_x86_64, lldb_dr6_x86_64, lldb_dr7_x86_64, 131 LLDB_INVALID_REGNUM // register sets need to end with this flag 132}; 133static_assert((sizeof(g_dbr_regnums_x86_64) / sizeof(g_dbr_regnums_x86_64[0])) - 134 1 == 135 k_num_dbr_registers_x86_64, 136 "g_dbr_regnums_x86_64 has wrong number of register infos"); 137 138// Number of register sets provided by this context. 139enum { k_num_register_sets = 4 }; 140 141// Register sets for x86 64-bit. 142static const RegisterSet g_reg_sets_x86_64[k_num_register_sets] = { 143 {"General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, 144 g_gpr_regnums_x86_64}, 145 {"Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, 146 g_fpu_regnums_x86_64}, 147 {"Extended State Registers", "xstate", 148 k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, 149 g_xstate_regnums_x86_64}, 150 {"Debug Registers", "dbr", k_num_dbr_registers_x86_64, 151 g_dbr_regnums_x86_64}, 152}; 153 154#define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) 155} // namespace 156 157NativeRegisterContextNetBSD * 158NativeRegisterContextNetBSD::CreateHostNativeRegisterContextNetBSD( 159 const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { 160 return new NativeRegisterContextNetBSD_x86_64(target_arch, native_thread); 161} 162 163// NativeRegisterContextNetBSD_x86_64 members. 164 165static RegisterInfoInterface * 166CreateRegisterInfoInterface(const ArchSpec &target_arch) { 167 assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && 168 "Register setting path assumes this is a 64-bit host"); 169 // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the x86_64 170 // register context. 171 return new RegisterContextNetBSD_x86_64(target_arch); 172} 173 174NativeRegisterContextNetBSD_x86_64::NativeRegisterContextNetBSD_x86_64( 175 const ArchSpec &target_arch, NativeThreadProtocol &native_thread) 176 : NativeRegisterContextNetBSD(native_thread, 177 CreateRegisterInfoInterface(target_arch)), 178 m_gpr_x86_64(), m_fpr_x86_64(), m_dbr_x86_64() {} 179 180// CONSIDER after local and llgs debugging are merged, register set support can 181// be moved into a base x86-64 class with IsRegisterSetAvailable made virtual. 182uint32_t NativeRegisterContextNetBSD_x86_64::GetRegisterSetCount() const { 183 uint32_t sets = 0; 184 for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index) { 185 if (GetSetForNativeRegNum(set_index) != -1) 186 ++sets; 187 } 188 189 return sets; 190} 191 192const RegisterSet * 193NativeRegisterContextNetBSD_x86_64::GetRegisterSet(uint32_t set_index) const { 194 switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { 195 case llvm::Triple::x86_64: 196 return &g_reg_sets_x86_64[set_index]; 197 default: 198 assert(false && "Unhandled target architecture."); 199 return nullptr; 200 } 201 202 return nullptr; 203} 204 205int NativeRegisterContextNetBSD_x86_64::GetSetForNativeRegNum( 206 int reg_num) const { 207 if (reg_num <= k_last_gpr_x86_64) 208 return GPRegSet; 209 else if (reg_num <= k_last_fpr_x86_64) 210 return FPRegSet; 211 else if (reg_num <= k_last_avx_x86_64) 212 return XStateRegSet; // AVX 213 else if (reg_num <= k_last_mpxr_x86_64) 214 return -1; // MPXR 215 else if (reg_num <= k_last_mpxc_x86_64) 216 return -1; // MPXC 217 else if (reg_num <= lldb_dr7_x86_64) 218 return DBRegSet; // DBR 219 else 220 return -1; 221} 222 223Status NativeRegisterContextNetBSD_x86_64::ReadRegisterSet(uint32_t set) { 224 switch (set) { 225 case GPRegSet: 226 return DoRegisterSet(PT_GETREGS, &m_gpr_x86_64); 227 case FPRegSet: 228 return DoRegisterSet(PT_GETFPREGS, &m_fpr_x86_64); 229 case DBRegSet: 230 return DoRegisterSet(PT_GETDBREGS, &m_dbr_x86_64); 231 case XStateRegSet: 232#ifdef HAVE_XSTATE 233 { 234 struct iovec iov = {&m_xstate_x86_64, sizeof(m_xstate_x86_64)}; 235 return DoRegisterSet(PT_GETXSTATE, &iov); 236 } 237#else 238 return Status("XState is not supported by the kernel"); 239#endif 240 } 241 llvm_unreachable("NativeRegisterContextNetBSD_x86_64::ReadRegisterSet"); 242} 243 244Status NativeRegisterContextNetBSD_x86_64::WriteRegisterSet(uint32_t set) { 245 switch (set) { 246 case GPRegSet: 247 return DoRegisterSet(PT_SETREGS, &m_gpr_x86_64); 248 case FPRegSet: 249 return DoRegisterSet(PT_SETFPREGS, &m_fpr_x86_64); 250 case DBRegSet: 251 return DoRegisterSet(PT_SETDBREGS, &m_dbr_x86_64); 252 case XStateRegSet: 253#ifdef HAVE_XSTATE 254 { 255 struct iovec iov = {&m_xstate_x86_64, sizeof(m_xstate_x86_64)}; 256 return DoRegisterSet(PT_SETXSTATE, &iov); 257 } 258#else 259 return Status("XState is not supported by the kernel"); 260#endif 261 } 262 llvm_unreachable("NativeRegisterContextNetBSD_x86_64::WriteRegisterSet"); 263} 264 265Status 266NativeRegisterContextNetBSD_x86_64::ReadRegister(const RegisterInfo *reg_info, 267 RegisterValue ®_value) { 268 Status error; 269 270 if (!reg_info) { 271 error.SetErrorString("reg_info NULL"); 272 return error; 273 } 274 275 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 276 if (reg == LLDB_INVALID_REGNUM) { 277 // This is likely an internal register for lldb use only and should not be 278 // directly queried. 279 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 280 "register, cannot read directly", 281 reg_info->name); 282 return error; 283 } 284 285 int set = GetSetForNativeRegNum(reg); 286 if (set == -1) { 287 // This is likely an internal register for lldb use only and should not be 288 // directly queried. 289 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 290 reg_info->name); 291 return error; 292 } 293 294 error = ReadRegisterSet(set); 295 if (error.Fail()) 296 return error; 297 298 switch (reg) { 299 case lldb_rax_x86_64: 300 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RAX]; 301 break; 302 case lldb_rbx_x86_64: 303 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBX]; 304 break; 305 case lldb_rcx_x86_64: 306 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RCX]; 307 break; 308 case lldb_rdx_x86_64: 309 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDX]; 310 break; 311 case lldb_rdi_x86_64: 312 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDI]; 313 break; 314 case lldb_rsi_x86_64: 315 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSI]; 316 break; 317 case lldb_rbp_x86_64: 318 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBP]; 319 break; 320 case lldb_rsp_x86_64: 321 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSP]; 322 break; 323 case lldb_r8_x86_64: 324 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R8]; 325 break; 326 case lldb_r9_x86_64: 327 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R9]; 328 break; 329 case lldb_r10_x86_64: 330 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R10]; 331 break; 332 case lldb_r11_x86_64: 333 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R11]; 334 break; 335 case lldb_r12_x86_64: 336 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R12]; 337 break; 338 case lldb_r13_x86_64: 339 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R13]; 340 break; 341 case lldb_r14_x86_64: 342 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R14]; 343 break; 344 case lldb_r15_x86_64: 345 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R15]; 346 break; 347 case lldb_rip_x86_64: 348 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RIP]; 349 break; 350 case lldb_rflags_x86_64: 351 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RFLAGS]; 352 break; 353 case lldb_cs_x86_64: 354 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_CS]; 355 break; 356 case lldb_fs_x86_64: 357 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_FS]; 358 break; 359 case lldb_gs_x86_64: 360 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_GS]; 361 break; 362 case lldb_ss_x86_64: 363 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_SS]; 364 break; 365 case lldb_ds_x86_64: 366 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_DS]; 367 break; 368 case lldb_es_x86_64: 369 reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_ES]; 370 break; 371 case lldb_fctrl_x86_64: 372 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_cw; 373 break; 374 case lldb_fstat_x86_64: 375 reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_sw; 376 break; 377 case lldb_ftag_x86_64: 378 reg_value = (uint8_t)m_fpr_x86_64.fxstate.fx_tw; 379 break; 380 case lldb_fop_x86_64: 381 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_opcode; 382 break; 383 case lldb_fiseg_x86_64: 384 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_ip.fa_64; 385 break; 386 case lldb_fioff_x86_64: 387 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off; 388 break; 389 case lldb_foseg_x86_64: 390 reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_dp.fa_64; 391 break; 392 case lldb_fooff_x86_64: 393 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off; 394 break; 395 case lldb_mxcsr_x86_64: 396 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr; 397 break; 398 case lldb_mxcsrmask_x86_64: 399 reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr_mask; 400 break; 401 case lldb_st0_x86_64: 402 case lldb_st1_x86_64: 403 case lldb_st2_x86_64: 404 case lldb_st3_x86_64: 405 case lldb_st4_x86_64: 406 case lldb_st5_x86_64: 407 case lldb_st6_x86_64: 408 case lldb_st7_x86_64: 409 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 410 reg_info->byte_size, endian::InlHostByteOrder()); 411 break; 412 case lldb_mm0_x86_64: 413 case lldb_mm1_x86_64: 414 case lldb_mm2_x86_64: 415 case lldb_mm3_x86_64: 416 case lldb_mm4_x86_64: 417 case lldb_mm5_x86_64: 418 case lldb_mm6_x86_64: 419 case lldb_mm7_x86_64: 420 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_mm0_x86_64], 421 reg_info->byte_size, endian::InlHostByteOrder()); 422 break; 423 case lldb_xmm0_x86_64: 424 case lldb_xmm1_x86_64: 425 case lldb_xmm2_x86_64: 426 case lldb_xmm3_x86_64: 427 case lldb_xmm4_x86_64: 428 case lldb_xmm5_x86_64: 429 case lldb_xmm6_x86_64: 430 case lldb_xmm7_x86_64: 431 case lldb_xmm8_x86_64: 432 case lldb_xmm9_x86_64: 433 case lldb_xmm10_x86_64: 434 case lldb_xmm11_x86_64: 435 case lldb_xmm12_x86_64: 436 case lldb_xmm13_x86_64: 437 case lldb_xmm14_x86_64: 438 case lldb_xmm15_x86_64: 439 reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 440 reg_info->byte_size, endian::InlHostByteOrder()); 441 break; 442 case lldb_ymm0_x86_64: 443 case lldb_ymm1_x86_64: 444 case lldb_ymm2_x86_64: 445 case lldb_ymm3_x86_64: 446 case lldb_ymm4_x86_64: 447 case lldb_ymm5_x86_64: 448 case lldb_ymm6_x86_64: 449 case lldb_ymm7_x86_64: 450 case lldb_ymm8_x86_64: 451 case lldb_ymm9_x86_64: 452 case lldb_ymm10_x86_64: 453 case lldb_ymm11_x86_64: 454 case lldb_ymm12_x86_64: 455 case lldb_ymm13_x86_64: 456 case lldb_ymm14_x86_64: 457 case lldb_ymm15_x86_64: 458#ifdef HAVE_XSTATE 459 if (!(m_xstate_x86_64.xs_rfbm & XCR0_SSE) || 460 !(m_xstate_x86_64.xs_rfbm & XCR0_YMM_Hi128)) { 461 error.SetErrorStringWithFormat("register \"%s\" not supported by CPU/kernel", 462 reg_info->name); 463 } else { 464 uint32_t reg_index = reg - lldb_ymm0_x86_64; 465 YMMReg ymm = XStateToYMM( 466 m_xstate_x86_64.xs_fxsave.fx_xmm[reg_index].xmm_bytes, 467 m_xstate_x86_64.xs_ymm_hi128.xs_ymm[reg_index].ymm_bytes); 468 reg_value.SetBytes(ymm.bytes, reg_info->byte_size, 469 endian::InlHostByteOrder()); 470 } 471#else 472 error.SetErrorString("XState queries not supported by the kernel"); 473#endif 474 break; 475 case lldb_dr0_x86_64: 476 case lldb_dr1_x86_64: 477 case lldb_dr2_x86_64: 478 case lldb_dr3_x86_64: 479 case lldb_dr4_x86_64: 480 case lldb_dr5_x86_64: 481 case lldb_dr6_x86_64: 482 case lldb_dr7_x86_64: 483 reg_value = (uint64_t)m_dbr_x86_64.dr[reg - lldb_dr0_x86_64]; 484 break; 485 } 486 487 return error; 488} 489 490Status NativeRegisterContextNetBSD_x86_64::WriteRegister( 491 const RegisterInfo *reg_info, const RegisterValue ®_value) { 492 493 Status error; 494 495 if (!reg_info) { 496 error.SetErrorString("reg_info NULL"); 497 return error; 498 } 499 500 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; 501 if (reg == LLDB_INVALID_REGNUM) { 502 // This is likely an internal register for lldb use only and should not be 503 // directly queried. 504 error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " 505 "register, cannot read directly", 506 reg_info->name); 507 return error; 508 } 509 510 int set = GetSetForNativeRegNum(reg); 511 if (set == -1) { 512 // This is likely an internal register for lldb use only and should not be 513 // directly queried. 514 error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", 515 reg_info->name); 516 return error; 517 } 518 519 error = ReadRegisterSet(set); 520 if (error.Fail()) 521 return error; 522 523 switch (reg) { 524 case lldb_rax_x86_64: 525 m_gpr_x86_64.regs[_REG_RAX] = reg_value.GetAsUInt64(); 526 break; 527 case lldb_rbx_x86_64: 528 m_gpr_x86_64.regs[_REG_RBX] = reg_value.GetAsUInt64(); 529 break; 530 case lldb_rcx_x86_64: 531 m_gpr_x86_64.regs[_REG_RCX] = reg_value.GetAsUInt64(); 532 break; 533 case lldb_rdx_x86_64: 534 m_gpr_x86_64.regs[_REG_RDX] = reg_value.GetAsUInt64(); 535 break; 536 case lldb_rdi_x86_64: 537 m_gpr_x86_64.regs[_REG_RDI] = reg_value.GetAsUInt64(); 538 break; 539 case lldb_rsi_x86_64: 540 m_gpr_x86_64.regs[_REG_RSI] = reg_value.GetAsUInt64(); 541 break; 542 case lldb_rbp_x86_64: 543 m_gpr_x86_64.regs[_REG_RBP] = reg_value.GetAsUInt64(); 544 break; 545 case lldb_rsp_x86_64: 546 m_gpr_x86_64.regs[_REG_RSP] = reg_value.GetAsUInt64(); 547 break; 548 case lldb_r8_x86_64: 549 m_gpr_x86_64.regs[_REG_R8] = reg_value.GetAsUInt64(); 550 break; 551 case lldb_r9_x86_64: 552 m_gpr_x86_64.regs[_REG_R9] = reg_value.GetAsUInt64(); 553 break; 554 case lldb_r10_x86_64: 555 m_gpr_x86_64.regs[_REG_R10] = reg_value.GetAsUInt64(); 556 break; 557 case lldb_r11_x86_64: 558 m_gpr_x86_64.regs[_REG_R11] = reg_value.GetAsUInt64(); 559 break; 560 case lldb_r12_x86_64: 561 m_gpr_x86_64.regs[_REG_R12] = reg_value.GetAsUInt64(); 562 break; 563 case lldb_r13_x86_64: 564 m_gpr_x86_64.regs[_REG_R13] = reg_value.GetAsUInt64(); 565 break; 566 case lldb_r14_x86_64: 567 m_gpr_x86_64.regs[_REG_R14] = reg_value.GetAsUInt64(); 568 break; 569 case lldb_r15_x86_64: 570 m_gpr_x86_64.regs[_REG_R15] = reg_value.GetAsUInt64(); 571 break; 572 case lldb_rip_x86_64: 573 m_gpr_x86_64.regs[_REG_RIP] = reg_value.GetAsUInt64(); 574 break; 575 case lldb_rflags_x86_64: 576 m_gpr_x86_64.regs[_REG_RFLAGS] = reg_value.GetAsUInt64(); 577 break; 578 case lldb_cs_x86_64: 579 m_gpr_x86_64.regs[_REG_CS] = reg_value.GetAsUInt64(); 580 break; 581 case lldb_fs_x86_64: 582 m_gpr_x86_64.regs[_REG_FS] = reg_value.GetAsUInt64(); 583 break; 584 case lldb_gs_x86_64: 585 m_gpr_x86_64.regs[_REG_GS] = reg_value.GetAsUInt64(); 586 break; 587 case lldb_ss_x86_64: 588 m_gpr_x86_64.regs[_REG_SS] = reg_value.GetAsUInt64(); 589 break; 590 case lldb_ds_x86_64: 591 m_gpr_x86_64.regs[_REG_DS] = reg_value.GetAsUInt64(); 592 break; 593 case lldb_es_x86_64: 594 m_gpr_x86_64.regs[_REG_ES] = reg_value.GetAsUInt64(); 595 break; 596 case lldb_fctrl_x86_64: 597 m_fpr_x86_64.fxstate.fx_cw = reg_value.GetAsUInt16(); 598 break; 599 case lldb_fstat_x86_64: 600 m_fpr_x86_64.fxstate.fx_sw = reg_value.GetAsUInt16(); 601 break; 602 case lldb_ftag_x86_64: 603 m_fpr_x86_64.fxstate.fx_tw = reg_value.GetAsUInt8(); 604 break; 605 case lldb_fop_x86_64: 606 m_fpr_x86_64.fxstate.fx_opcode = reg_value.GetAsUInt16(); 607 break; 608 case lldb_fiseg_x86_64: 609 m_fpr_x86_64.fxstate.fx_ip.fa_64 = reg_value.GetAsUInt64(); 610 break; 611 case lldb_fioff_x86_64: 612 m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off = reg_value.GetAsUInt32(); 613 break; 614 case lldb_foseg_x86_64: 615 m_fpr_x86_64.fxstate.fx_dp.fa_64 = reg_value.GetAsUInt64(); 616 break; 617 case lldb_fooff_x86_64: 618 m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off = reg_value.GetAsUInt32(); 619 break; 620 case lldb_mxcsr_x86_64: 621 m_fpr_x86_64.fxstate.fx_mxcsr = reg_value.GetAsUInt32(); 622 break; 623 case lldb_mxcsrmask_x86_64: 624 m_fpr_x86_64.fxstate.fx_mxcsr_mask = reg_value.GetAsUInt32(); 625 break; 626 case lldb_st0_x86_64: 627 case lldb_st1_x86_64: 628 case lldb_st2_x86_64: 629 case lldb_st3_x86_64: 630 case lldb_st4_x86_64: 631 case lldb_st5_x86_64: 632 case lldb_st6_x86_64: 633 case lldb_st7_x86_64: 634 ::memcpy(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], 635 reg_value.GetBytes(), reg_value.GetByteSize()); 636 break; 637 case lldb_mm0_x86_64: 638 case lldb_mm1_x86_64: 639 case lldb_mm2_x86_64: 640 case lldb_mm3_x86_64: 641 case lldb_mm4_x86_64: 642 case lldb_mm5_x86_64: 643 case lldb_mm6_x86_64: 644 case lldb_mm7_x86_64: 645 ::memcpy(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_mm0_x86_64], 646 reg_value.GetBytes(), reg_value.GetByteSize()); 647 break; 648 case lldb_xmm0_x86_64: 649 case lldb_xmm1_x86_64: 650 case lldb_xmm2_x86_64: 651 case lldb_xmm3_x86_64: 652 case lldb_xmm4_x86_64: 653 case lldb_xmm5_x86_64: 654 case lldb_xmm6_x86_64: 655 case lldb_xmm7_x86_64: 656 case lldb_xmm8_x86_64: 657 case lldb_xmm9_x86_64: 658 case lldb_xmm10_x86_64: 659 case lldb_xmm11_x86_64: 660 case lldb_xmm12_x86_64: 661 case lldb_xmm13_x86_64: 662 case lldb_xmm14_x86_64: 663 case lldb_xmm15_x86_64: 664 ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], 665 reg_value.GetBytes(), reg_value.GetByteSize()); 666 break; 667 case lldb_ymm0_x86_64: 668 case lldb_ymm1_x86_64: 669 case lldb_ymm2_x86_64: 670 case lldb_ymm3_x86_64: 671 case lldb_ymm4_x86_64: 672 case lldb_ymm5_x86_64: 673 case lldb_ymm6_x86_64: 674 case lldb_ymm7_x86_64: 675 case lldb_ymm8_x86_64: 676 case lldb_ymm9_x86_64: 677 case lldb_ymm10_x86_64: 678 case lldb_ymm11_x86_64: 679 case lldb_ymm12_x86_64: 680 case lldb_ymm13_x86_64: 681 case lldb_ymm14_x86_64: 682 case lldb_ymm15_x86_64: 683#ifdef HAVE_XSTATE 684 if (!(m_xstate_x86_64.xs_rfbm & XCR0_SSE) || 685 !(m_xstate_x86_64.xs_rfbm & XCR0_YMM_Hi128)) { 686 error.SetErrorStringWithFormat("register \"%s\" not supported by CPU/kernel", 687 reg_info->name); 688 } else { 689 uint32_t reg_index = reg - lldb_ymm0_x86_64; 690 YMMReg ymm; 691 ::memcpy(ymm.bytes, reg_value.GetBytes(), reg_value.GetByteSize()); 692 YMMToXState(ymm, 693 m_xstate_x86_64.xs_fxsave.fx_xmm[reg_index].xmm_bytes, 694 m_xstate_x86_64.xs_ymm_hi128.xs_ymm[reg_index].ymm_bytes); 695 } 696#else 697 error.SetErrorString("XState not supported by the kernel"); 698#endif 699 break; 700 case lldb_dr0_x86_64: 701 case lldb_dr1_x86_64: 702 case lldb_dr2_x86_64: 703 case lldb_dr3_x86_64: 704 case lldb_dr4_x86_64: 705 case lldb_dr5_x86_64: 706 case lldb_dr6_x86_64: 707 case lldb_dr7_x86_64: 708 m_dbr_x86_64.dr[reg - lldb_dr0_x86_64] = reg_value.GetAsUInt64(); 709 break; 710 } 711 712 return WriteRegisterSet(set); 713} 714 715Status NativeRegisterContextNetBSD_x86_64::ReadAllRegisterValues( 716 lldb::DataBufferSP &data_sp) { 717 Status error; 718 719 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); 720 error = ReadRegisterSet(GPRegSet); 721 if (error.Fail()) 722 return error; 723 724 uint8_t *dst = data_sp->GetBytes(); 725 ::memcpy(dst, &m_gpr_x86_64, GetRegisterInfoInterface().GetGPRSize()); 726 dst += GetRegisterInfoInterface().GetGPRSize(); 727 728 return error; 729} 730 731Status NativeRegisterContextNetBSD_x86_64::WriteAllRegisterValues( 732 const lldb::DataBufferSP &data_sp) { 733 Status error; 734 735 if (!data_sp) { 736 error.SetErrorStringWithFormat( 737 "NativeRegisterContextNetBSD_x86_64::%s invalid data_sp provided", 738 __FUNCTION__); 739 return error; 740 } 741 742 if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { 743 error.SetErrorStringWithFormat( 744 "NativeRegisterContextNetBSD_x86_64::%s data_sp contained mismatched " 745 "data size, expected %" PRIu64 ", actual %" PRIu64, 746 __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); 747 return error; 748 } 749 750 uint8_t *src = data_sp->GetBytes(); 751 if (src == nullptr) { 752 error.SetErrorStringWithFormat("NativeRegisterContextNetBSD_x86_64::%s " 753 "DataBuffer::GetBytes() returned a null " 754 "pointer", 755 __FUNCTION__); 756 return error; 757 } 758 ::memcpy(&m_gpr_x86_64, src, GetRegisterInfoInterface().GetGPRSize()); 759 760 error = WriteRegisterSet(GPRegSet); 761 if (error.Fail()) 762 return error; 763 src += GetRegisterInfoInterface().GetGPRSize(); 764 765 return error; 766} 767 768Status NativeRegisterContextNetBSD_x86_64::IsWatchpointHit(uint32_t wp_index, 769 bool &is_hit) { 770 if (wp_index >= NumSupportedHardwareWatchpoints()) 771 return Status("Watchpoint index out of range"); 772 773 RegisterValue reg_value; 774 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr6_x86_64); 775 Status error = ReadRegister(reg_info, reg_value); 776 if (error.Fail()) { 777 is_hit = false; 778 return error; 779 } 780 781 uint64_t status_bits = reg_value.GetAsUInt64(); 782 783 is_hit = status_bits & (1 << wp_index); 784 785 return error; 786} 787 788Status NativeRegisterContextNetBSD_x86_64::GetWatchpointHitIndex( 789 uint32_t &wp_index, lldb::addr_t trap_addr) { 790 uint32_t num_hw_wps = NumSupportedHardwareWatchpoints(); 791 for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) { 792 bool is_hit; 793 Status error = IsWatchpointHit(wp_index, is_hit); 794 if (error.Fail()) { 795 wp_index = LLDB_INVALID_INDEX32; 796 return error; 797 } else if (is_hit) { 798 return error; 799 } 800 } 801 wp_index = LLDB_INVALID_INDEX32; 802 return Status(); 803} 804 805Status NativeRegisterContextNetBSD_x86_64::IsWatchpointVacant(uint32_t wp_index, 806 bool &is_vacant) { 807 if (wp_index >= NumSupportedHardwareWatchpoints()) 808 return Status("Watchpoint index out of range"); 809 810 RegisterValue reg_value; 811 const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr7_x86_64); 812 Status error = ReadRegister(reg_info, reg_value); 813 if (error.Fail()) { 814 is_vacant = false; 815 return error; 816 } 817 818 uint64_t control_bits = reg_value.GetAsUInt64(); 819 820 is_vacant = !(control_bits & (1 << (2 * wp_index + 1))); 821 822 return error; 823} 824 825Status NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( 826 lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) { 827 828 if (wp_index >= NumSupportedHardwareWatchpoints()) 829 return Status("Watchpoint index out of range"); 830 831 // Read only watchpoints aren't supported on x86_64. Fall back to read/write 832 // waitchpoints instead. 833 // TODO: Add logic to detect when a write happens and ignore that watchpoint 834 // hit. 835 if (watch_flags == 0x2) 836 watch_flags = 0x3; 837 838 if (watch_flags != 0x1 && watch_flags != 0x3) 839 return Status("Invalid read/write bits for watchpoint"); 840 841 if (size != 1 && size != 2 && size != 4 && size != 8) 842 return Status("Invalid size for watchpoint"); 843 844 bool is_vacant; 845 Status error = IsWatchpointVacant(wp_index, is_vacant); 846 if (error.Fail()) 847 return error; 848 if (!is_vacant) 849 return Status("Watchpoint index not vacant"); 850 851 const RegisterInfo *const reg_info_dr7 = 852 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 853 RegisterValue dr7_value; 854 error = ReadRegister(reg_info_dr7, dr7_value); 855 if (error.Fail()) 856 return error; 857 858 // for watchpoints 0, 1, 2, or 3, respectively, set bits 1, 3, 5, or 7 859 uint64_t enable_bit = 1 << (2 * wp_index + 1); 860 861 // set bits 16-17, 20-21, 24-25, or 28-29 862 // with 0b01 for write, and 0b11 for read/write 863 uint64_t rw_bits = watch_flags << (16 + 4 * wp_index); 864 865 // set bits 18-19, 22-23, 26-27, or 30-31 866 // with 0b00, 0b01, 0b10, or 0b11 867 // for 1, 2, 8 (if supported), or 4 bytes, respectively 868 uint64_t size_bits = (size == 8 ? 0x2 : size - 1) << (18 + 4 * wp_index); 869 870 uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); 871 872 uint64_t control_bits = dr7_value.GetAsUInt64() & ~bit_mask; 873 874 control_bits |= enable_bit | rw_bits | size_bits; 875 876 const RegisterInfo *const reg_info_drN = 877 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 878 RegisterValue drN_value; 879 error = ReadRegister(reg_info_drN, drN_value); 880 if (error.Fail()) 881 return error; 882 883 // clear dr6 if address or bits changed (i.e. we're not reenabling the same 884 // watchpoint) 885 if (drN_value.GetAsUInt64() != addr || 886 (dr7_value.GetAsUInt64() & bit_mask) != (rw_bits | size_bits)) { 887 ClearWatchpointHit(wp_index); 888 889 error = WriteRegister(reg_info_drN, RegisterValue(addr)); 890 if (error.Fail()) 891 return error; 892 } 893 894 error = WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 895 if (error.Fail()) 896 return error; 897 898 error.Clear(); 899 return error; 900} 901 902bool NativeRegisterContextNetBSD_x86_64::ClearHardwareWatchpoint( 903 uint32_t wp_index) { 904 if (wp_index >= NumSupportedHardwareWatchpoints()) 905 return false; 906 907 // for watchpoints 0, 1, 2, or 3, respectively, clear bits 0-1, 2-3, 4-5 908 // or 6-7 of the debug control register (DR7) 909 const RegisterInfo *const reg_info_dr7 = 910 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 911 RegisterValue reg_value; 912 Status error = ReadRegister(reg_info_dr7, reg_value); 913 if (error.Fail()) 914 return false; 915 uint64_t bit_mask = 0x3 << (2 * wp_index); 916 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 917 918 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); 919} 920 921Status NativeRegisterContextNetBSD_x86_64::ClearWatchpointHit(uint32_t wp_index) { 922 if (wp_index >= NumSupportedHardwareWatchpoints()) 923 return Status("Watchpoint index out of range"); 924 925 // for watchpoints 0, 1, 2, or 3, respectively, check bits 0, 1, 2, or 3 of 926 // the debug status register (DR6) 927 const RegisterInfo *const reg_info_dr6 = 928 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 929 RegisterValue reg_value; 930 Status error = ReadRegister(reg_info_dr6, reg_value); 931 if (error.Fail()) 932 return error; 933 934 uint64_t bit_mask = 1 << wp_index; 935 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 936 return WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 937} 938 939Status NativeRegisterContextNetBSD_x86_64::ClearAllHardwareWatchpoints() { 940 RegisterValue reg_value; 941 942 // clear bits {0-4} of the debug status register (DR6) 943 const RegisterInfo *const reg_info_dr6 = 944 GetRegisterInfoAtIndex(lldb_dr6_x86_64); 945 Status error = ReadRegister(reg_info_dr6, reg_value); 946 if (error.Fail()) 947 return error; 948 uint64_t bit_mask = 0xF; 949 uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; 950 error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); 951 if (error.Fail()) 952 return error; 953 954 // clear bits {0-7,16-31} of the debug control register (DR7) 955 const RegisterInfo *const reg_info_dr7 = 956 GetRegisterInfoAtIndex(lldb_dr7_x86_64); 957 error = ReadRegister(reg_info_dr7, reg_value); 958 if (error.Fail()) 959 return error; 960 bit_mask = 0xFF | (0xFFFF << 16); 961 uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; 962 return WriteRegister(reg_info_dr7, RegisterValue(control_bits)); 963} 964 965uint32_t NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpoint( 966 lldb::addr_t addr, size_t size, uint32_t watch_flags) { 967 Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); 968 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); 969 for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) { 970 bool is_vacant; 971 Status error = IsWatchpointVacant(wp_index, is_vacant); 972 if (is_vacant) { 973 error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index); 974 if (error.Success()) 975 return wp_index; 976 } 977 if (error.Fail() && log) { 978 LLDB_LOGF(log, "NativeRegisterContextNetBSD_x86_64::%s Error: %s", 979 __FUNCTION__, error.AsCString()); 980 } 981 } 982 return LLDB_INVALID_INDEX32; 983} 984 985lldb::addr_t 986NativeRegisterContextNetBSD_x86_64::GetWatchpointAddress(uint32_t wp_index) { 987 if (wp_index >= NumSupportedHardwareWatchpoints()) 988 return LLDB_INVALID_ADDRESS; 989 RegisterValue reg_value; 990 const RegisterInfo *const reg_info_drN = 991 GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); 992 if (ReadRegister(reg_info_drN, reg_value).Fail()) 993 return LLDB_INVALID_ADDRESS; 994 return reg_value.GetAsUInt64(); 995} 996 997uint32_t NativeRegisterContextNetBSD_x86_64::NumSupportedHardwareWatchpoints() { 998 // Available debug address registers: dr0, dr1, dr2, dr3 999 return 4; 1000} 1001 1002Status NativeRegisterContextNetBSD_x86_64::CopyHardwareWatchpointsFrom( 1003 NativeRegisterContextNetBSD &source) { 1004 auto &r_source = static_cast<NativeRegisterContextNetBSD_x86_64&>(source); 1005 Status res = r_source.ReadRegisterSet(DBRegSet); 1006 if (!res.Fail()) { 1007 // copy dbregs only if any watchpoints were set 1008 if ((r_source.m_dbr_x86_64.dr[7] & 0xFF) == 0) 1009 return res; 1010 1011 m_dbr_x86_64 = r_source.m_dbr_x86_64; 1012 res = WriteRegisterSet(DBRegSet); 1013 } 1014 return res; 1015} 1016 1017#endif // defined(__x86_64__) 1018