| //===-- NativeRegisterContextWindows_x86_64.cpp ---------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #if defined(__x86_64__) || defined(_M_X64) |
| |
| #include "NativeRegisterContextWindows_x86_64.h" |
| #include "NativeRegisterContextWindows_WoW64.h" |
| #include "NativeThreadWindows.h" |
| #include "Plugins/Process/Utility/RegisterContextWindows_i386.h" |
| #include "Plugins/Process/Utility/RegisterContextWindows_x86_64.h" |
| #include "ProcessWindowsLog.h" |
| #include "lldb/Host/HostInfo.h" |
| #include "lldb/Host/HostThread.h" |
| #include "lldb/Host/windows/HostThreadWindows.h" |
| #include "lldb/Host/windows/windows.h" |
| |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/RegisterValue.h" |
| #include "llvm/ADT/STLExtras.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| #define REG_CONTEXT_SIZE sizeof(::CONTEXT) |
| |
| namespace { |
| static const uint32_t g_gpr_regnums_x86_64[] = { |
| lldb_rax_x86_64, lldb_rbx_x86_64, lldb_rcx_x86_64, lldb_rdx_x86_64, |
| lldb_rdi_x86_64, lldb_rsi_x86_64, lldb_rbp_x86_64, lldb_rsp_x86_64, |
| lldb_r8_x86_64, lldb_r9_x86_64, lldb_r10_x86_64, lldb_r11_x86_64, |
| lldb_r12_x86_64, lldb_r13_x86_64, lldb_r14_x86_64, lldb_r15_x86_64, |
| lldb_rip_x86_64, lldb_rflags_x86_64, lldb_cs_x86_64, lldb_fs_x86_64, |
| lldb_gs_x86_64, lldb_ss_x86_64, lldb_ds_x86_64, lldb_es_x86_64, |
| LLDB_INVALID_REGNUM // Register set must be terminated with this flag |
| }; |
| |
| static const uint32_t g_fpr_regnums_x86_64[] = { |
| lldb_xmm0_x86_64, lldb_xmm1_x86_64, lldb_xmm2_x86_64, lldb_xmm3_x86_64, |
| lldb_xmm4_x86_64, lldb_xmm5_x86_64, lldb_xmm6_x86_64, lldb_xmm7_x86_64, |
| lldb_xmm8_x86_64, lldb_xmm9_x86_64, lldb_xmm10_x86_64, lldb_xmm11_x86_64, |
| lldb_xmm12_x86_64, lldb_xmm13_x86_64, lldb_xmm14_x86_64, lldb_xmm15_x86_64, |
| LLDB_INVALID_REGNUM // Register set must be terminated with this flag |
| }; |
| |
| static const RegisterSet g_reg_sets_x86_64[] = { |
| {"General Purpose Registers", "gpr", |
| llvm::array_lengthof(g_gpr_regnums_x86_64) - 1, g_gpr_regnums_x86_64}, |
| {"Floating Point Registers", "fpr", |
| llvm::array_lengthof(g_fpr_regnums_x86_64) - 1, g_fpr_regnums_x86_64}}; |
| |
| enum { k_num_register_sets = 2 }; |
| |
| } // namespace |
| |
| static RegisterInfoInterface * |
| CreateRegisterInfoInterface(const ArchSpec &target_arch) { |
| assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && |
| "Register setting path assumes this is a 64-bit host"); |
| return new RegisterContextWindows_x86_64(target_arch); |
| } |
| |
| static Status GetThreadContextHelper(lldb::thread_t thread_handle, |
| PCONTEXT context_ptr, |
| const DWORD control_flag) { |
| Log *log = ProcessWindowsLog::GetLogIfAny(WINDOWS_LOG_REGISTERS); |
| Status error; |
| |
| memset(context_ptr, 0, sizeof(::CONTEXT)); |
| context_ptr->ContextFlags = control_flag; |
| if (!::GetThreadContext(thread_handle, context_ptr)) { |
| error.SetError(GetLastError(), eErrorTypeWin32); |
| LLDB_LOG(log, "{0} GetThreadContext failed with error {1}", __FUNCTION__, |
| error); |
| return error; |
| } |
| return Status(); |
| } |
| |
| static Status SetThreadContextHelper(lldb::thread_t thread_handle, |
| PCONTEXT context_ptr) { |
| Log *log = ProcessWindowsLog::GetLogIfAny(WINDOWS_LOG_REGISTERS); |
| Status error; |
| // It's assumed that the thread has stopped. |
| if (!::SetThreadContext(thread_handle, context_ptr)) { |
| error.SetError(GetLastError(), eErrorTypeWin32); |
| LLDB_LOG(log, "{0} SetThreadContext failed with error {1}", __FUNCTION__, |
| error); |
| return error; |
| } |
| return Status(); |
| } |
| |
| std::unique_ptr<NativeRegisterContextWindows> |
| NativeRegisterContextWindows::CreateHostNativeRegisterContextWindows( |
| const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { |
| // Register context for a WoW64 application. |
| if (target_arch.GetAddressByteSize() == 4) |
| return std::make_unique<NativeRegisterContextWindows_WoW64>(target_arch, |
| native_thread); |
| |
| // Register context for a native 64-bit application. |
| return std::make_unique<NativeRegisterContextWindows_x86_64>(target_arch, |
| native_thread); |
| } |
| |
| NativeRegisterContextWindows_x86_64::NativeRegisterContextWindows_x86_64( |
| const ArchSpec &target_arch, NativeThreadProtocol &native_thread) |
| : NativeRegisterContextWindows(native_thread, |
| CreateRegisterInfoInterface(target_arch)) {} |
| |
| bool NativeRegisterContextWindows_x86_64::IsGPR(uint32_t reg_index) const { |
| return (reg_index >= k_first_gpr_x86_64 && reg_index < k_first_alias_x86_64); |
| } |
| |
| bool NativeRegisterContextWindows_x86_64::IsFPR(uint32_t reg_index) const { |
| return (reg_index >= lldb_xmm0_x86_64 && reg_index <= k_last_fpr_x86_64); |
| } |
| |
| bool NativeRegisterContextWindows_x86_64::IsDR(uint32_t reg_index) const { |
| return (reg_index >= lldb_dr0_x86_64 && reg_index <= lldb_dr7_x86_64); |
| } |
| |
| uint32_t NativeRegisterContextWindows_x86_64::GetRegisterSetCount() const { |
| return k_num_register_sets; |
| } |
| |
| const RegisterSet * |
| NativeRegisterContextWindows_x86_64::GetRegisterSet(uint32_t set_index) const { |
| if (set_index >= k_num_register_sets) |
| return nullptr; |
| return &g_reg_sets_x86_64[set_index]; |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::GPRRead(const uint32_t reg, |
| RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS; |
| Status error = |
| GetThreadContextHelper(GetThreadHandle(), &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_rax_x86_64: |
| reg_value.SetUInt64(tls_context.Rax); |
| break; |
| case lldb_rbx_x86_64: |
| reg_value.SetUInt64(tls_context.Rbx); |
| break; |
| case lldb_rcx_x86_64: |
| reg_value.SetUInt64(tls_context.Rcx); |
| break; |
| case lldb_rdx_x86_64: |
| reg_value.SetUInt64(tls_context.Rdx); |
| break; |
| case lldb_rdi_x86_64: |
| reg_value.SetUInt64(tls_context.Rdi); |
| break; |
| case lldb_rsi_x86_64: |
| reg_value.SetUInt64(tls_context.Rsi); |
| break; |
| case lldb_rbp_x86_64: |
| reg_value.SetUInt64(tls_context.Rbp); |
| break; |
| case lldb_rsp_x86_64: |
| reg_value.SetUInt64(tls_context.Rsp); |
| break; |
| case lldb_r8_x86_64: |
| reg_value.SetUInt64(tls_context.R8); |
| break; |
| case lldb_r9_x86_64: |
| reg_value.SetUInt64(tls_context.R9); |
| break; |
| case lldb_r10_x86_64: |
| reg_value.SetUInt64(tls_context.R10); |
| break; |
| case lldb_r11_x86_64: |
| reg_value.SetUInt64(tls_context.R11); |
| break; |
| case lldb_r12_x86_64: |
| reg_value.SetUInt64(tls_context.R12); |
| break; |
| case lldb_r13_x86_64: |
| reg_value.SetUInt64(tls_context.R13); |
| break; |
| case lldb_r14_x86_64: |
| reg_value.SetUInt64(tls_context.R14); |
| break; |
| case lldb_r15_x86_64: |
| reg_value.SetUInt64(tls_context.R15); |
| break; |
| case lldb_rip_x86_64: |
| reg_value.SetUInt64(tls_context.Rip); |
| break; |
| case lldb_rflags_x86_64: |
| reg_value.SetUInt64(tls_context.EFlags | 0x2); // Bit #1 always 1 |
| break; |
| case lldb_cs_x86_64: |
| reg_value.SetUInt16(tls_context.SegCs); |
| break; |
| case lldb_fs_x86_64: |
| reg_value.SetUInt16(tls_context.SegFs); |
| break; |
| case lldb_gs_x86_64: |
| reg_value.SetUInt16(tls_context.SegGs); |
| break; |
| case lldb_ss_x86_64: |
| reg_value.SetUInt16(tls_context.SegSs); |
| break; |
| case lldb_ds_x86_64: |
| reg_value.SetUInt16(tls_context.SegDs); |
| break; |
| case lldb_es_x86_64: |
| reg_value.SetUInt16(tls_context.SegEs); |
| break; |
| } |
| |
| return error; |
| } |
| |
| Status |
| NativeRegisterContextWindows_x86_64::GPRWrite(const uint32_t reg, |
| const RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS; |
| auto thread_handle = GetThreadHandle(); |
| Status error = |
| GetThreadContextHelper(thread_handle, &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_rax_x86_64: |
| tls_context.Rax = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rbx_x86_64: |
| tls_context.Rbx = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rcx_x86_64: |
| tls_context.Rcx = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rdx_x86_64: |
| tls_context.Rdx = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rdi_x86_64: |
| tls_context.Rdi = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rsi_x86_64: |
| tls_context.Rsi = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rbp_x86_64: |
| tls_context.Rbp = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rsp_x86_64: |
| tls_context.Rsp = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r8_x86_64: |
| tls_context.R8 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r9_x86_64: |
| tls_context.R9 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r10_x86_64: |
| tls_context.R10 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r11_x86_64: |
| tls_context.R11 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r12_x86_64: |
| tls_context.R12 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r13_x86_64: |
| tls_context.R13 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r14_x86_64: |
| tls_context.R14 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_r15_x86_64: |
| tls_context.R15 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rip_x86_64: |
| tls_context.Rip = reg_value.GetAsUInt64(); |
| break; |
| case lldb_rflags_x86_64: |
| tls_context.EFlags = reg_value.GetAsUInt64(); |
| break; |
| case lldb_cs_x86_64: |
| tls_context.SegCs = reg_value.GetAsUInt16(); |
| break; |
| case lldb_fs_x86_64: |
| tls_context.SegFs = reg_value.GetAsUInt16(); |
| break; |
| case lldb_gs_x86_64: |
| tls_context.SegGs = reg_value.GetAsUInt16(); |
| break; |
| case lldb_ss_x86_64: |
| tls_context.SegSs = reg_value.GetAsUInt16(); |
| break; |
| case lldb_ds_x86_64: |
| tls_context.SegDs = reg_value.GetAsUInt16(); |
| break; |
| case lldb_es_x86_64: |
| tls_context.SegEs = reg_value.GetAsUInt16(); |
| break; |
| } |
| |
| return SetThreadContextHelper(thread_handle, &tls_context); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::FPRRead(const uint32_t reg, |
| RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_CONTROL | CONTEXT_FLOATING_POINT; |
| Status error = |
| GetThreadContextHelper(GetThreadHandle(), &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_xmm0_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm0, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm1_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm1, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm2_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm2, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm3_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm3, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm4_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm4, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm5_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm5, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm6_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm6, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm7_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm7, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm8_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm8, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm9_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm9, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm10_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm10, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm11_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm11, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm12_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm12, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm13_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm13, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm14_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm14, 16, endian::InlHostByteOrder()); |
| break; |
| case lldb_xmm15_x86_64: |
| reg_value.SetBytes(&tls_context.Xmm15, 16, endian::InlHostByteOrder()); |
| break; |
| } |
| |
| return error; |
| } |
| |
| Status |
| NativeRegisterContextWindows_x86_64::FPRWrite(const uint32_t reg, |
| const RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_CONTROL | CONTEXT_FLOATING_POINT; |
| auto thread_handle = GetThreadHandle(); |
| Status error = |
| GetThreadContextHelper(thread_handle, &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_xmm0_x86_64: |
| memcpy(&tls_context.Xmm0, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm1_x86_64: |
| memcpy(&tls_context.Xmm1, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm2_x86_64: |
| memcpy(&tls_context.Xmm2, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm3_x86_64: |
| memcpy(&tls_context.Xmm3, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm4_x86_64: |
| memcpy(&tls_context.Xmm4, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm5_x86_64: |
| memcpy(&tls_context.Xmm5, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm6_x86_64: |
| memcpy(&tls_context.Xmm6, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm7_x86_64: |
| memcpy(&tls_context.Xmm7, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm8_x86_64: |
| memcpy(&tls_context.Xmm8, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm9_x86_64: |
| memcpy(&tls_context.Xmm9, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm10_x86_64: |
| memcpy(&tls_context.Xmm10, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm11_x86_64: |
| memcpy(&tls_context.Xmm11, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm12_x86_64: |
| memcpy(&tls_context.Xmm12, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm13_x86_64: |
| memcpy(&tls_context.Xmm13, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm14_x86_64: |
| memcpy(&tls_context.Xmm14, reg_value.GetBytes(), 16); |
| break; |
| case lldb_xmm15_x86_64: |
| memcpy(&tls_context.Xmm15, reg_value.GetBytes(), 16); |
| break; |
| } |
| |
| return SetThreadContextHelper(thread_handle, &tls_context); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::DRRead(const uint32_t reg, |
| RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_DEBUG_REGISTERS; |
| Status error = |
| GetThreadContextHelper(GetThreadHandle(), &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_dr0_x86_64: |
| reg_value.SetUInt64(tls_context.Dr0); |
| break; |
| case lldb_dr1_x86_64: |
| reg_value.SetUInt64(tls_context.Dr1); |
| break; |
| case lldb_dr2_x86_64: |
| reg_value.SetUInt64(tls_context.Dr2); |
| break; |
| case lldb_dr3_x86_64: |
| reg_value.SetUInt64(tls_context.Dr3); |
| break; |
| case lldb_dr4_x86_64: |
| return Status("register DR4 is obsolete"); |
| case lldb_dr5_x86_64: |
| return Status("register DR5 is obsolete"); |
| case lldb_dr6_x86_64: |
| reg_value.SetUInt64(tls_context.Dr6); |
| break; |
| case lldb_dr7_x86_64: |
| reg_value.SetUInt64(tls_context.Dr7); |
| break; |
| } |
| |
| return {}; |
| } |
| |
| Status |
| NativeRegisterContextWindows_x86_64::DRWrite(const uint32_t reg, |
| const RegisterValue ®_value) { |
| ::CONTEXT tls_context; |
| DWORD context_flag = CONTEXT_DEBUG_REGISTERS; |
| auto thread_handle = GetThreadHandle(); |
| Status error = |
| GetThreadContextHelper(thread_handle, &tls_context, context_flag); |
| if (error.Fail()) |
| return error; |
| |
| switch (reg) { |
| case lldb_dr0_x86_64: |
| tls_context.Dr0 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_dr1_x86_64: |
| tls_context.Dr1 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_dr2_x86_64: |
| tls_context.Dr2 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_dr3_x86_64: |
| tls_context.Dr3 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_dr4_x86_64: |
| return Status("register DR4 is obsolete"); |
| case lldb_dr5_x86_64: |
| return Status("register DR5 is obsolete"); |
| case lldb_dr6_x86_64: |
| tls_context.Dr6 = reg_value.GetAsUInt64(); |
| break; |
| case lldb_dr7_x86_64: |
| tls_context.Dr7 = reg_value.GetAsUInt64(); |
| break; |
| } |
| |
| return SetThreadContextHelper(thread_handle, &tls_context); |
| } |
| |
| Status |
| NativeRegisterContextWindows_x86_64::ReadRegister(const RegisterInfo *reg_info, |
| RegisterValue ®_value) { |
| Status error; |
| if (!reg_info) { |
| error.SetErrorString("reg_info NULL"); |
| return error; |
| } |
| |
| const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; |
| if (reg == LLDB_INVALID_REGNUM) { |
| // This is likely an internal register for lldb use only and should not be |
| // directly queried. |
| error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " |
| "register, cannot read directly", |
| reg_info->name); |
| return error; |
| } |
| |
| if (IsGPR(reg)) |
| return GPRRead(reg, reg_value); |
| |
| if (IsFPR(reg)) |
| return FPRRead(reg, reg_value); |
| |
| if (IsDR(reg)) |
| return DRRead(reg, reg_value); |
| |
| return Status("unimplemented"); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::WriteRegister( |
| const RegisterInfo *reg_info, const RegisterValue ®_value) { |
| Status error; |
| |
| if (!reg_info) { |
| error.SetErrorString("reg_info NULL"); |
| return error; |
| } |
| |
| const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; |
| if (reg == LLDB_INVALID_REGNUM) { |
| // This is likely an internal register for lldb use only and should not be |
| // directly written. |
| error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " |
| "register, cannot write directly", |
| reg_info->name); |
| return error; |
| } |
| |
| if (IsGPR(reg)) |
| return GPRWrite(reg, reg_value); |
| |
| if (IsFPR(reg)) |
| return FPRWrite(reg, reg_value); |
| |
| if (IsDR(reg)) |
| return DRWrite(reg, reg_value); |
| |
| return Status("unimplemented"); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::ReadAllRegisterValues( |
| lldb::DataBufferSP &data_sp) { |
| const size_t data_size = REG_CONTEXT_SIZE; |
| data_sp = std::make_shared<DataBufferHeap>(data_size, 0); |
| ::CONTEXT tls_context; |
| Status error = |
| GetThreadContextHelper(GetThreadHandle(), &tls_context, CONTEXT_ALL); |
| if (error.Fail()) |
| return error; |
| |
| uint8_t *dst = data_sp->GetBytes(); |
| ::memcpy(dst, &tls_context, data_size); |
| return error; |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::WriteAllRegisterValues( |
| const lldb::DataBufferSP &data_sp) { |
| Status error; |
| const size_t data_size = REG_CONTEXT_SIZE; |
| if (!data_sp) { |
| error.SetErrorStringWithFormat( |
| "NativeRegisterContextWindows_x86_64::%s invalid data_sp provided", |
| __FUNCTION__); |
| return error; |
| } |
| |
| if (data_sp->GetByteSize() != data_size) { |
| error.SetErrorStringWithFormatv( |
| "data_sp contained mismatched data size, expected {0}, actual {1}", |
| data_size, data_sp->GetByteSize()); |
| return error; |
| } |
| |
| ::CONTEXT tls_context; |
| memcpy(&tls_context, data_sp->GetBytes(), data_size); |
| return SetThreadContextHelper(GetThreadHandle(), &tls_context); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::IsWatchpointHit(uint32_t wp_index, |
| bool &is_hit) { |
| is_hit = false; |
| |
| if (wp_index >= NumSupportedHardwareWatchpoints()) |
| return Status("watchpoint index out of range"); |
| |
| RegisterValue reg_value; |
| Status error = DRRead(lldb_dr6_x86_64, reg_value); |
| if (error.Fail()) |
| return error; |
| |
| is_hit = reg_value.GetAsUInt64() & (1ULL << wp_index); |
| |
| return {}; |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::GetWatchpointHitIndex( |
| uint32_t &wp_index, lldb::addr_t trap_addr) { |
| wp_index = LLDB_INVALID_INDEX32; |
| |
| for (uint32_t i = 0; i < NumSupportedHardwareWatchpoints(); i++) { |
| bool is_hit; |
| Status error = IsWatchpointHit(i, is_hit); |
| if (error.Fail()) |
| return error; |
| |
| if (is_hit) { |
| wp_index = i; |
| return {}; |
| } |
| } |
| |
| return {}; |
| } |
| |
| Status |
| NativeRegisterContextWindows_x86_64::IsWatchpointVacant(uint32_t wp_index, |
| bool &is_vacant) { |
| is_vacant = false; |
| |
| if (wp_index >= NumSupportedHardwareWatchpoints()) |
| return Status("Watchpoint index out of range"); |
| |
| RegisterValue reg_value; |
| Status error = DRRead(lldb_dr7_x86_64, reg_value); |
| if (error.Fail()) |
| return error; |
| |
| is_vacant = !(reg_value.GetAsUInt64() & (1ULL << (2 * wp_index))); |
| |
| return error; |
| } |
| |
| bool NativeRegisterContextWindows_x86_64::ClearHardwareWatchpoint( |
| uint32_t wp_index) { |
| if (wp_index >= NumSupportedHardwareWatchpoints()) |
| return false; |
| |
| // for watchpoints 0, 1, 2, or 3, respectively, clear bits 0, 1, 2, or 3 of |
| // the debug status register (DR6) |
| |
| RegisterValue reg_value; |
| Status error = DRRead(lldb_dr6_x86_64, reg_value); |
| if (error.Fail()) |
| return false; |
| |
| uint64_t bit_mask = 1ULL << wp_index; |
| uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; |
| error = DRWrite(lldb_dr6_x86_64, RegisterValue(status_bits)); |
| if (error.Fail()) |
| return false; |
| |
| // for watchpoints 0, 1, 2, or 3, respectively, clear bits {0-1,16-19}, |
| // {2-3,20-23}, {4-5,24-27}, or {6-7,28-31} of the debug control register |
| // (DR7) |
| |
| error = DRRead(lldb_dr7_x86_64, reg_value); |
| if (error.Fail()) |
| return false; |
| |
| bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); |
| uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; |
| return DRWrite(lldb_dr7_x86_64, RegisterValue(control_bits)).Success(); |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::ClearAllHardwareWatchpoints() { |
| RegisterValue reg_value; |
| |
| // clear bits {0-4} of the debug status register (DR6) |
| |
| Status error = DRRead(lldb_dr6_x86_64, reg_value); |
| if (error.Fail()) |
| return error; |
| |
| uint64_t status_bits = reg_value.GetAsUInt64() & ~0xFULL; |
| error = DRWrite(lldb_dr6_x86_64, RegisterValue(status_bits)); |
| if (error.Fail()) |
| return error; |
| |
| // clear bits {0-7,16-31} of the debug control register (DR7) |
| |
| error = DRRead(lldb_dr7_x86_64, reg_value); |
| if (error.Fail()) |
| return error; |
| |
| uint64_t control_bits = reg_value.GetAsUInt64() & ~0xFFFF00FFULL; |
| return DRWrite(lldb_dr7_x86_64, RegisterValue(control_bits)); |
| } |
| |
| uint32_t NativeRegisterContextWindows_x86_64::SetHardwareWatchpoint( |
| lldb::addr_t addr, size_t size, uint32_t watch_flags) { |
| switch (size) { |
| case 1: |
| case 2: |
| case 4: |
| case 8: |
| break; |
| default: |
| return LLDB_INVALID_INDEX32; |
| } |
| |
| if (watch_flags == 0x2) |
| watch_flags = 0x3; |
| |
| if (watch_flags != 0x1 && watch_flags != 0x3) |
| return LLDB_INVALID_INDEX32; |
| |
| for (uint32_t wp_index = 0; wp_index < NumSupportedHardwareWatchpoints(); |
| ++wp_index) { |
| bool is_vacant; |
| if (IsWatchpointVacant(wp_index, is_vacant).Fail()) |
| return LLDB_INVALID_INDEX32; |
| |
| if (is_vacant) { |
| if (!ClearHardwareWatchpoint(wp_index)) |
| return LLDB_INVALID_INDEX32; |
| |
| if (ApplyHardwareBreakpoint(wp_index, addr, size, watch_flags).Fail()) |
| return LLDB_INVALID_INDEX32; |
| |
| return wp_index; |
| } |
| } |
| return LLDB_INVALID_INDEX32; |
| } |
| |
| Status NativeRegisterContextWindows_x86_64::ApplyHardwareBreakpoint( |
| uint32_t wp_index, lldb::addr_t addr, size_t size, uint32_t flags) { |
| RegisterValue reg_value; |
| auto error = DRRead(lldb_dr7_x86_64, reg_value); |
| if (error.Fail()) |
| return error; |
| |
| // for watchpoints 0, 1, 2, or 3, respectively, set bits 1, 3, 5, or 7 |
| uint64_t enable_bit = 1ULL << (2 * wp_index); |
| |
| // set bits 16-17, 20-21, 24-25, or 28-29 |
| // with 0b01 for write, and 0b11 for read/write |
| uint64_t rw_bits = flags << (16 + 4 * wp_index); |
| |
| // set bits 18-19, 22-23, 26-27, or 30-31 |
| // with 0b00, 0b01, 0b10, or 0b11 |
| // for 1, 2, 8 (if supported), or 4 bytes, respectively |
| uint64_t size_bits = (size == 8 ? 0x2 : size - 1) << (18 + 4 * wp_index); |
| |
| uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); |
| |
| uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; |
| control_bits |= enable_bit | rw_bits | size_bits; |
| |
| error = DRWrite(lldb_dr7_x86_64, RegisterValue(control_bits)); |
| if (error.Fail()) |
| return error; |
| |
| error = DRWrite(lldb_dr0_x86_64 + wp_index, RegisterValue(addr)); |
| if (error.Fail()) |
| return error; |
| |
| return {}; |
| } |
| |
| lldb::addr_t |
| NativeRegisterContextWindows_x86_64::GetWatchpointAddress(uint32_t wp_index) { |
| if (wp_index >= NumSupportedHardwareWatchpoints()) |
| return LLDB_INVALID_ADDRESS; |
| |
| RegisterValue reg_value; |
| if (DRRead(lldb_dr0_x86_64 + wp_index, reg_value).Fail()) |
| return LLDB_INVALID_ADDRESS; |
| |
| return reg_value.GetAsUInt64(); |
| } |
| |
| uint32_t |
| NativeRegisterContextWindows_x86_64::NumSupportedHardwareWatchpoints() { |
| return 4; |
| } |
| |
| #endif // defined(__x86_64__) || defined(_M_X64) |
