//===-- NativeRegisterContextNetBSD_x86_64.cpp ---------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #if defined(__x86_64__) #include "NativeRegisterContextNetBSD_x86_64.h" #include "lldb/Core/RegisterValue.h" #include "lldb/Host/HostInfo.h" #include "lldb/Utility/DataBufferHeap.h" #include "lldb/Utility/Log.h" #include "lldb/Utility/Status.h" #include "Plugins/Process/Utility/RegisterContextNetBSD_x86_64.h" // clang-format off #include #include #include #include #include #include #include // clang-format on using namespace lldb_private; using namespace lldb_private::process_netbsd; // ---------------------------------------------------------------------------- // Private namespace. // ---------------------------------------------------------------------------- namespace { // x86 64-bit general purpose registers. 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_eax_x86_64, lldb_ebx_x86_64, lldb_ecx_x86_64, lldb_edx_x86_64, lldb_edi_x86_64, lldb_esi_x86_64, lldb_ebp_x86_64, lldb_esp_x86_64, lldb_r8d_x86_64, // Low 32 bits or r8 lldb_r9d_x86_64, // Low 32 bits or r9 lldb_r10d_x86_64, // Low 32 bits or r10 lldb_r11d_x86_64, // Low 32 bits or r11 lldb_r12d_x86_64, // Low 32 bits or r12 lldb_r13d_x86_64, // Low 32 bits or r13 lldb_r14d_x86_64, // Low 32 bits or r14 lldb_r15d_x86_64, // Low 32 bits or r15 lldb_ax_x86_64, lldb_bx_x86_64, lldb_cx_x86_64, lldb_dx_x86_64, lldb_di_x86_64, lldb_si_x86_64, lldb_bp_x86_64, lldb_sp_x86_64, lldb_r8w_x86_64, // Low 16 bits or r8 lldb_r9w_x86_64, // Low 16 bits or r9 lldb_r10w_x86_64, // Low 16 bits or r10 lldb_r11w_x86_64, // Low 16 bits or r11 lldb_r12w_x86_64, // Low 16 bits or r12 lldb_r13w_x86_64, // Low 16 bits or r13 lldb_r14w_x86_64, // Low 16 bits or r14 lldb_r15w_x86_64, // Low 16 bits or r15 lldb_ah_x86_64, lldb_bh_x86_64, lldb_ch_x86_64, lldb_dh_x86_64, lldb_al_x86_64, lldb_bl_x86_64, lldb_cl_x86_64, lldb_dl_x86_64, lldb_dil_x86_64, lldb_sil_x86_64, lldb_bpl_x86_64, lldb_spl_x86_64, lldb_r8l_x86_64, // Low 8 bits or r8 lldb_r9l_x86_64, // Low 8 bits or r9 lldb_r10l_x86_64, // Low 8 bits or r10 lldb_r11l_x86_64, // Low 8 bits or r11 lldb_r12l_x86_64, // Low 8 bits or r12 lldb_r13l_x86_64, // Low 8 bits or r13 lldb_r14l_x86_64, // Low 8 bits or r14 lldb_r15l_x86_64, // Low 8 bits or r15 LLDB_INVALID_REGNUM // register sets need to end with this flag }; static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 1 == k_num_gpr_registers_x86_64, "g_gpr_regnums_x86_64 has wrong number of register infos"); // Number of register sets provided by this context. enum { k_num_extended_register_sets = 2, k_num_register_sets = 4 }; // Register sets for x86 64-bit. static const RegisterSet g_reg_sets_x86_64[k_num_register_sets] = { {"General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, g_gpr_regnums_x86_64}, }; #define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) const int fpu_present = []() -> int { int mib[2]; int error; size_t len; int val; len = sizeof(val); mib[0] = CTL_MACHDEP; mib[1] = CPU_FPU_PRESENT; error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); if (error) errx(EXIT_FAILURE, "sysctl"); return val; }(); const int osfxsr = []() -> int { int mib[2]; int error; size_t len; int val; len = sizeof(val); mib[0] = CTL_MACHDEP; mib[1] = CPU_OSFXSR; error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); if (error) errx(EXIT_FAILURE, "sysctl"); return val; }(); const int fpu_save = []() -> int { int mib[2]; int error; size_t len; int val; len = sizeof(val); mib[0] = CTL_MACHDEP; mib[1] = CPU_FPU_SAVE; error = sysctl(mib, __arraycount(mib), &val, &len, NULL, 0); if (error) errx(EXIT_FAILURE, "sysctl"); return val; }(); } // namespace NativeRegisterContextNetBSD * NativeRegisterContextNetBSD::CreateHostNativeRegisterContextNetBSD( const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { return new NativeRegisterContextNetBSD_x86_64(target_arch, native_thread); } // ---------------------------------------------------------------------------- // NativeRegisterContextNetBSD_x86_64 members. // ---------------------------------------------------------------------------- static RegisterInfoInterface * CreateRegisterInfoInterface(const ArchSpec &target_arch) { assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && "Register setting path assumes this is a 64-bit host"); // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the // x86_64 register context. return new RegisterContextNetBSD_x86_64(target_arch); } NativeRegisterContextNetBSD_x86_64::NativeRegisterContextNetBSD_x86_64( const ArchSpec &target_arch, NativeThreadProtocol &native_thread) : NativeRegisterContextNetBSD(native_thread, CreateRegisterInfoInterface(target_arch)), m_gpr_x86_64(), m_fpr_x86_64(), m_dbr_x86_64() {} // CONSIDER after local and llgs debugging are merged, register set support can // be moved into a base x86-64 class with IsRegisterSetAvailable made virtual. uint32_t NativeRegisterContextNetBSD_x86_64::GetRegisterSetCount() const { uint32_t sets = 0; for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index) { if (GetSetForNativeRegNum(set_index) != -1) ++sets; } return sets; } const RegisterSet * NativeRegisterContextNetBSD_x86_64::GetRegisterSet(uint32_t set_index) const { switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { case llvm::Triple::x86_64: return &g_reg_sets_x86_64[set_index]; default: assert(false && "Unhandled target architecture."); return nullptr; } return nullptr; } int NativeRegisterContextNetBSD_x86_64::GetSetForNativeRegNum( int reg_num) const { if (reg_num <= k_last_gpr_x86_64) return GPRegSet; else if (reg_num <= k_last_fpr_x86_64) return (fpu_present == 1 && osfxsr == 1 && fpu_save >= 1) ? FPRegSet : -1; else if (reg_num <= k_last_avx_x86_64) return -1; // AVX else if (reg_num <= k_last_mpxr_x86_64) return -1; // MPXR else if (reg_num <= k_last_mpxc_x86_64) return -1; // MPXC else if (reg_num <= lldb_dr7_x86_64) return DBRegSet; // DBR else return -1; } int NativeRegisterContextNetBSD_x86_64::ReadRegisterSet(uint32_t set) { switch (set) { case GPRegSet: ReadGPR(); return 0; case FPRegSet: ReadFPR(); return 0; case DBRegSet: ReadDBR(); return 0; default: break; } return -1; } int NativeRegisterContextNetBSD_x86_64::WriteRegisterSet(uint32_t set) { switch (set) { case GPRegSet: WriteGPR(); return 0; case FPRegSet: WriteFPR(); return 0; case DBRegSet: WriteDBR(); return 0; default: break; } return -1; } Status NativeRegisterContextNetBSD_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; } int set = GetSetForNativeRegNum(reg); if (set == -1) { // This is likely an internal register for lldb use only and should not be // directly queried. error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", reg_info->name); return error; } if (ReadRegisterSet(set) != 0) { // This is likely an internal register for lldb use only and should not be // directly queried. error.SetErrorStringWithFormat( "reading register set for register \"%s\" failed", reg_info->name); return error; } switch (reg) { case lldb_rax_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RAX]; break; case lldb_rbx_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBX]; break; case lldb_rcx_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RCX]; break; case lldb_rdx_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDX]; break; case lldb_rdi_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RDI]; break; case lldb_rsi_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSI]; break; case lldb_rbp_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RBP]; break; case lldb_rsp_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RSP]; break; case lldb_r8_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R8]; break; case lldb_r9_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R9]; break; case lldb_r10_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R10]; break; case lldb_r11_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R11]; break; case lldb_r12_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R12]; break; case lldb_r13_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R13]; break; case lldb_r14_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R14]; break; case lldb_r15_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_R15]; break; case lldb_rip_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RIP]; break; case lldb_rflags_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_RFLAGS]; break; case lldb_cs_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_CS]; break; case lldb_fs_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_FS]; break; case lldb_gs_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_GS]; break; case lldb_ss_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_SS]; break; case lldb_ds_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_DS]; break; case lldb_es_x86_64: reg_value = (uint64_t)m_gpr_x86_64.regs[_REG_ES]; break; case lldb_fctrl_x86_64: reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_cw; break; case lldb_fstat_x86_64: reg_value = (uint16_t)m_fpr_x86_64.fxstate.fx_sw; break; case lldb_ftag_x86_64: reg_value = (uint8_t)m_fpr_x86_64.fxstate.fx_tw; break; case lldb_fop_x86_64: reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_opcode; break; case lldb_fiseg_x86_64: reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_ip.fa_64; break; case lldb_fioff_x86_64: reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off; break; case lldb_foseg_x86_64: reg_value = (uint64_t)m_fpr_x86_64.fxstate.fx_dp.fa_64; break; case lldb_fooff_x86_64: reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off; break; case lldb_mxcsr_x86_64: reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr; break; case lldb_mxcsrmask_x86_64: reg_value = (uint32_t)m_fpr_x86_64.fxstate.fx_mxcsr_mask; break; case lldb_st0_x86_64: case lldb_st1_x86_64: case lldb_st2_x86_64: case lldb_st3_x86_64: case lldb_st4_x86_64: case lldb_st5_x86_64: case lldb_st6_x86_64: case lldb_st7_x86_64: reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], reg_info->byte_size, endian::InlHostByteOrder()); break; case lldb_mm0_x86_64: case lldb_mm1_x86_64: case lldb_mm2_x86_64: case lldb_mm3_x86_64: case lldb_mm4_x86_64: case lldb_mm5_x86_64: case lldb_mm6_x86_64: case lldb_mm7_x86_64: reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], reg_info->byte_size, endian::InlHostByteOrder()); break; case lldb_xmm0_x86_64: case lldb_xmm1_x86_64: case lldb_xmm2_x86_64: case lldb_xmm3_x86_64: case lldb_xmm4_x86_64: case lldb_xmm5_x86_64: case lldb_xmm6_x86_64: case lldb_xmm7_x86_64: case lldb_xmm8_x86_64: case lldb_xmm9_x86_64: case lldb_xmm10_x86_64: case lldb_xmm11_x86_64: case lldb_xmm12_x86_64: case lldb_xmm13_x86_64: case lldb_xmm14_x86_64: case lldb_xmm15_x86_64: reg_value.SetBytes(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], reg_info->byte_size, endian::InlHostByteOrder()); break; case lldb_dr0_x86_64: case lldb_dr1_x86_64: case lldb_dr2_x86_64: case lldb_dr3_x86_64: case lldb_dr4_x86_64: case lldb_dr5_x86_64: case lldb_dr6_x86_64: case lldb_dr7_x86_64: reg_value = (uint64_t)m_dbr_x86_64.dr[reg - lldb_dr0_x86_64]; break; } return error; } Status NativeRegisterContextNetBSD_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 queried. error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " "register, cannot read directly", reg_info->name); return error; } int set = GetSetForNativeRegNum(reg); if (set == -1) { // This is likely an internal register for lldb use only and should not be // directly queried. error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", reg_info->name); return error; } if (ReadRegisterSet(set) != 0) { // This is likely an internal register for lldb use only and should not be // directly queried. error.SetErrorStringWithFormat( "reading register set for register \"%s\" failed", reg_info->name); return error; } switch (reg) { case lldb_rax_x86_64: m_gpr_x86_64.regs[_REG_RAX] = reg_value.GetAsUInt64(); break; case lldb_rbx_x86_64: m_gpr_x86_64.regs[_REG_RBX] = reg_value.GetAsUInt64(); break; case lldb_rcx_x86_64: m_gpr_x86_64.regs[_REG_RCX] = reg_value.GetAsUInt64(); break; case lldb_rdx_x86_64: m_gpr_x86_64.regs[_REG_RDX] = reg_value.GetAsUInt64(); break; case lldb_rdi_x86_64: m_gpr_x86_64.regs[_REG_RDI] = reg_value.GetAsUInt64(); break; case lldb_rsi_x86_64: m_gpr_x86_64.regs[_REG_RSI] = reg_value.GetAsUInt64(); break; case lldb_rbp_x86_64: m_gpr_x86_64.regs[_REG_RBP] = reg_value.GetAsUInt64(); break; case lldb_rsp_x86_64: m_gpr_x86_64.regs[_REG_RSP] = reg_value.GetAsUInt64(); break; case lldb_r8_x86_64: m_gpr_x86_64.regs[_REG_R8] = reg_value.GetAsUInt64(); break; case lldb_r9_x86_64: m_gpr_x86_64.regs[_REG_R9] = reg_value.GetAsUInt64(); break; case lldb_r10_x86_64: m_gpr_x86_64.regs[_REG_R10] = reg_value.GetAsUInt64(); break; case lldb_r11_x86_64: m_gpr_x86_64.regs[_REG_R11] = reg_value.GetAsUInt64(); break; case lldb_r12_x86_64: m_gpr_x86_64.regs[_REG_R12] = reg_value.GetAsUInt64(); break; case lldb_r13_x86_64: m_gpr_x86_64.regs[_REG_R13] = reg_value.GetAsUInt64(); break; case lldb_r14_x86_64: m_gpr_x86_64.regs[_REG_R14] = reg_value.GetAsUInt64(); break; case lldb_r15_x86_64: m_gpr_x86_64.regs[_REG_R15] = reg_value.GetAsUInt64(); break; case lldb_rip_x86_64: m_gpr_x86_64.regs[_REG_RIP] = reg_value.GetAsUInt64(); break; case lldb_rflags_x86_64: m_gpr_x86_64.regs[_REG_RFLAGS] = reg_value.GetAsUInt64(); break; case lldb_cs_x86_64: m_gpr_x86_64.regs[_REG_CS] = reg_value.GetAsUInt64(); break; case lldb_fs_x86_64: m_gpr_x86_64.regs[_REG_FS] = reg_value.GetAsUInt64(); break; case lldb_gs_x86_64: m_gpr_x86_64.regs[_REG_GS] = reg_value.GetAsUInt64(); break; case lldb_ss_x86_64: m_gpr_x86_64.regs[_REG_SS] = reg_value.GetAsUInt64(); break; case lldb_ds_x86_64: m_gpr_x86_64.regs[_REG_DS] = reg_value.GetAsUInt64(); break; case lldb_es_x86_64: m_gpr_x86_64.regs[_REG_ES] = reg_value.GetAsUInt64(); break; case lldb_fctrl_x86_64: m_fpr_x86_64.fxstate.fx_cw = reg_value.GetAsUInt16(); break; case lldb_fstat_x86_64: m_fpr_x86_64.fxstate.fx_sw = reg_value.GetAsUInt16(); break; case lldb_ftag_x86_64: m_fpr_x86_64.fxstate.fx_tw = reg_value.GetAsUInt8(); break; case lldb_fop_x86_64: m_fpr_x86_64.fxstate.fx_opcode = reg_value.GetAsUInt16(); break; case lldb_fiseg_x86_64: m_fpr_x86_64.fxstate.fx_ip.fa_64 = reg_value.GetAsUInt64(); break; case lldb_fioff_x86_64: m_fpr_x86_64.fxstate.fx_ip.fa_32.fa_off = reg_value.GetAsUInt32(); break; case lldb_foseg_x86_64: m_fpr_x86_64.fxstate.fx_dp.fa_64 = reg_value.GetAsUInt64(); break; case lldb_fooff_x86_64: m_fpr_x86_64.fxstate.fx_dp.fa_32.fa_off = reg_value.GetAsUInt32(); break; case lldb_mxcsr_x86_64: m_fpr_x86_64.fxstate.fx_mxcsr = reg_value.GetAsUInt32(); break; case lldb_mxcsrmask_x86_64: m_fpr_x86_64.fxstate.fx_mxcsr_mask = reg_value.GetAsUInt32(); break; case lldb_st0_x86_64: case lldb_st1_x86_64: case lldb_st2_x86_64: case lldb_st3_x86_64: case lldb_st4_x86_64: case lldb_st5_x86_64: case lldb_st6_x86_64: case lldb_st7_x86_64: ::memcpy(&m_fpr_x86_64.fxstate.fx_87_ac[reg - lldb_st0_x86_64], reg_value.GetBytes(), reg_value.GetByteSize()); break; case lldb_mm0_x86_64: case lldb_mm1_x86_64: case lldb_mm2_x86_64: case lldb_mm3_x86_64: case lldb_mm4_x86_64: case lldb_mm5_x86_64: case lldb_mm6_x86_64: case lldb_mm7_x86_64: ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_mm0_x86_64], reg_value.GetBytes(), reg_value.GetByteSize()); break; case lldb_xmm0_x86_64: case lldb_xmm1_x86_64: case lldb_xmm2_x86_64: case lldb_xmm3_x86_64: case lldb_xmm4_x86_64: case lldb_xmm5_x86_64: case lldb_xmm6_x86_64: case lldb_xmm7_x86_64: case lldb_xmm8_x86_64: case lldb_xmm9_x86_64: case lldb_xmm10_x86_64: case lldb_xmm11_x86_64: case lldb_xmm12_x86_64: case lldb_xmm13_x86_64: case lldb_xmm14_x86_64: case lldb_xmm15_x86_64: ::memcpy(&m_fpr_x86_64.fxstate.fx_xmm[reg - lldb_xmm0_x86_64], reg_value.GetBytes(), reg_value.GetByteSize()); break; case lldb_dr0_x86_64: case lldb_dr1_x86_64: case lldb_dr2_x86_64: case lldb_dr3_x86_64: case lldb_dr4_x86_64: case lldb_dr5_x86_64: case lldb_dr6_x86_64: case lldb_dr7_x86_64: m_dbr_x86_64.dr[reg - lldb_dr0_x86_64] = reg_value.GetAsUInt64(); break; } if (WriteRegisterSet(set) != 0) error.SetErrorStringWithFormat("failed to write register set"); return error; } Status NativeRegisterContextNetBSD_x86_64::ReadAllRegisterValues( lldb::DataBufferSP &data_sp) { Status error; data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); if (!data_sp) { error.SetErrorStringWithFormat( "failed to allocate DataBufferHeap instance of size %" PRIu64, REG_CONTEXT_SIZE); return error; } error = ReadGPR(); if (error.Fail()) return error; uint8_t *dst = data_sp->GetBytes(); if (dst == nullptr) { error.SetErrorStringWithFormat("DataBufferHeap instance of size %" PRIu64 " returned a null pointer", REG_CONTEXT_SIZE); return error; } ::memcpy(dst, &m_gpr_x86_64, GetRegisterInfoInterface().GetGPRSize()); dst += GetRegisterInfoInterface().GetGPRSize(); RegisterValue value((uint64_t)-1); const RegisterInfo *reg_info = GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_eax"); if (reg_info == nullptr) reg_info = GetRegisterInfoInterface().GetDynamicRegisterInfo("orig_rax"); return error; } Status NativeRegisterContextNetBSD_x86_64::WriteAllRegisterValues( const lldb::DataBufferSP &data_sp) { Status error; if (!data_sp) { error.SetErrorStringWithFormat( "NativeRegisterContextNetBSD_x86_64::%s invalid data_sp provided", __FUNCTION__); return error; } if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { error.SetErrorStringWithFormat( "NativeRegisterContextNetBSD_x86_64::%s data_sp contained mismatched " "data size, expected %" PRIu64 ", actual %" PRIu64, __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); return error; } uint8_t *src = data_sp->GetBytes(); if (src == nullptr) { error.SetErrorStringWithFormat("NativeRegisterContextNetBSD_x86_64::%s " "DataBuffer::GetBytes() returned a null " "pointer", __FUNCTION__); return error; } ::memcpy(&m_gpr_x86_64, src, GetRegisterInfoInterface().GetGPRSize()); error = WriteGPR(); if (error.Fail()) return error; src += GetRegisterInfoInterface().GetGPRSize(); return error; } Status NativeRegisterContextNetBSD_x86_64::IsWatchpointHit(uint32_t wp_index, bool &is_hit) { if (wp_index >= NumSupportedHardwareWatchpoints()) return Status("Watchpoint index out of range"); RegisterValue reg_value; const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr6_x86_64); Status error = ReadRegister(reg_info, reg_value); if (error.Fail()) { is_hit = false; return error; } uint64_t status_bits = reg_value.GetAsUInt64(); is_hit = status_bits & (1 << wp_index); return error; } Status NativeRegisterContextNetBSD_x86_64::GetWatchpointHitIndex( uint32_t &wp_index, lldb::addr_t trap_addr) { uint32_t num_hw_wps = NumSupportedHardwareWatchpoints(); for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) { bool is_hit; Status error = IsWatchpointHit(wp_index, is_hit); if (error.Fail()) { wp_index = LLDB_INVALID_INDEX32; return error; } else if (is_hit) { return error; } } wp_index = LLDB_INVALID_INDEX32; return Status(); } Status NativeRegisterContextNetBSD_x86_64::IsWatchpointVacant(uint32_t wp_index, bool &is_vacant) { if (wp_index >= NumSupportedHardwareWatchpoints()) return Status("Watchpoint index out of range"); RegisterValue reg_value; const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(lldb_dr7_x86_64); Status error = ReadRegister(reg_info, reg_value); if (error.Fail()) { is_vacant = false; return error; } uint64_t control_bits = reg_value.GetAsUInt64(); is_vacant = !(control_bits & (1 << (2 * wp_index))); return error; } Status NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) { if (wp_index >= NumSupportedHardwareWatchpoints()) return Status("Watchpoint index out of range"); // Read only watchpoints aren't supported on x86_64. Fall back to read/write // waitchpoints instead. // TODO: Add logic to detect when a write happens and ignore that watchpoint // hit. if (watch_flags == 0x2) watch_flags = 0x3; if (watch_flags != 0x1 && watch_flags != 0x3) return Status("Invalid read/write bits for watchpoint"); if (size != 1 && size != 2 && size != 4 && size != 8) return Status("Invalid size for watchpoint"); bool is_vacant; Status error = IsWatchpointVacant(wp_index, is_vacant); if (error.Fail()) return error; if (!is_vacant) return Status("Watchpoint index not vacant"); RegisterValue reg_value; const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(lldb_dr7_x86_64); error = ReadRegister(reg_info_dr7, 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 = 1 << (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 = watch_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; const RegisterInfo *const reg_info_drN = GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); error = WriteRegister(reg_info_drN, RegisterValue(addr)); if (error.Fail()) return error; error = WriteRegister(reg_info_dr7, RegisterValue(control_bits)); if (error.Fail()) return error; error.Clear(); return error; } bool NativeRegisterContextNetBSD_x86_64::ClearHardwareWatchpoint( uint32_t wp_index) { if (wp_index >= NumSupportedHardwareWatchpoints()) return false; RegisterValue reg_value; // for watchpoints 0, 1, 2, or 3, respectively, // clear bits 0, 1, 2, or 3 of the debug status register (DR6) const RegisterInfo *const reg_info_dr6 = GetRegisterInfoAtIndex(lldb_dr6_x86_64); Status error = ReadRegister(reg_info_dr6, reg_value); if (error.Fail()) return false; uint64_t bit_mask = 1 << wp_index; uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; error = WriteRegister(reg_info_dr6, 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) const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(lldb_dr7_x86_64); error = ReadRegister(reg_info_dr7, 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 WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); } Status NativeRegisterContextNetBSD_x86_64::ClearAllHardwareWatchpoints() { RegisterValue reg_value; // clear bits {0-4} of the debug status register (DR6) const RegisterInfo *const reg_info_dr6 = GetRegisterInfoAtIndex(lldb_dr6_x86_64); Status error = ReadRegister(reg_info_dr6, reg_value); if (error.Fail()) return error; uint64_t bit_mask = 0xF; uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); if (error.Fail()) return error; // clear bits {0-7,16-31} of the debug control register (DR7) const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(lldb_dr7_x86_64); error = ReadRegister(reg_info_dr7, reg_value); if (error.Fail()) return error; bit_mask = 0xFF | (0xFFFF << 16); uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; return WriteRegister(reg_info_dr7, RegisterValue(control_bits)); } uint32_t NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpoint( lldb::addr_t addr, size_t size, uint32_t watch_flags) { Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) { bool is_vacant; Status error = IsWatchpointVacant(wp_index, is_vacant); if (is_vacant) { error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index); if (error.Success()) return wp_index; } if (error.Fail() && log) { log->Printf("NativeRegisterContextNetBSD_x86_64::%s Error: %s", __FUNCTION__, error.AsCString()); } } return LLDB_INVALID_INDEX32; } lldb::addr_t NativeRegisterContextNetBSD_x86_64::GetWatchpointAddress(uint32_t wp_index) { if (wp_index >= NumSupportedHardwareWatchpoints()) return LLDB_INVALID_ADDRESS; RegisterValue reg_value; const RegisterInfo *const reg_info_drN = GetRegisterInfoAtIndex(lldb_dr0_x86_64 + wp_index); if (ReadRegister(reg_info_drN, reg_value).Fail()) return LLDB_INVALID_ADDRESS; return reg_value.GetAsUInt64(); } uint32_t NativeRegisterContextNetBSD_x86_64::NumSupportedHardwareWatchpoints() { // Available debug address registers: dr0, dr1, dr2, dr3 return 4; } #endif // defined(__x86_64__)