diff options
Diffstat (limited to 'lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.cpp | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.cpp b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.cpp new file mode 100644 index 000000000000..9328d606ad26 --- /dev/null +++ b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.cpp @@ -0,0 +1,656 @@ +//===-- NativeRegisterContextFreeBSD_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(__i386__) || defined(__x86_64__) + +#include "NativeRegisterContextFreeBSD_x86_64.h" + +// clang-format off +#include <x86/fpu.h> +#include <x86/specialreg.h> +#include <cpuid.h> +// clang-format on + +#include "lldb/Host/HostInfo.h" +#include "lldb/Utility/DataBufferHeap.h" +#include "lldb/Utility/Log.h" +#include "lldb/Utility/RegisterValue.h" +#include "lldb/Utility/Status.h" + +#include "NativeProcessFreeBSD.h" +#include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h" +#include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h" + +using namespace lldb_private; +using namespace lldb_private::process_freebsd; + +// 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"); + +// x86 64-bit floating point registers. +static const uint32_t g_fpu_regnums_x86_64[] = { + lldb_fctrl_x86_64, lldb_fstat_x86_64, lldb_ftag_x86_64, + lldb_fop_x86_64, lldb_fiseg_x86_64, lldb_fioff_x86_64, + lldb_fip_x86_64, lldb_foseg_x86_64, lldb_fooff_x86_64, + lldb_fdp_x86_64, lldb_mxcsr_x86_64, lldb_mxcsrmask_x86_64, + lldb_st0_x86_64, lldb_st1_x86_64, lldb_st2_x86_64, + lldb_st3_x86_64, lldb_st4_x86_64, lldb_st5_x86_64, + lldb_st6_x86_64, lldb_st7_x86_64, lldb_mm0_x86_64, + lldb_mm1_x86_64, lldb_mm2_x86_64, lldb_mm3_x86_64, + lldb_mm4_x86_64, lldb_mm5_x86_64, lldb_mm6_x86_64, + lldb_mm7_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 sets need to end with this flag +}; +static_assert((sizeof(g_fpu_regnums_x86_64) / sizeof(g_fpu_regnums_x86_64[0])) - + 1 == + k_num_fpr_registers_x86_64, + "g_fpu_regnums_x86_64 has wrong number of register infos"); + +static const uint32_t g_avx_regnums_x86_64[] = { + lldb_ymm0_x86_64, lldb_ymm1_x86_64, lldb_ymm2_x86_64, lldb_ymm3_x86_64, + lldb_ymm4_x86_64, lldb_ymm5_x86_64, lldb_ymm6_x86_64, lldb_ymm7_x86_64, + lldb_ymm8_x86_64, lldb_ymm9_x86_64, lldb_ymm10_x86_64, lldb_ymm11_x86_64, + lldb_ymm12_x86_64, lldb_ymm13_x86_64, lldb_ymm14_x86_64, lldb_ymm15_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_avx_regnums_x86_64) / sizeof(g_avx_regnums_x86_64[0])) - + 1 == + k_num_avx_registers_x86_64, + "g_avx_regnums_x86_64 has wrong number of register infos"); + +static const uint32_t g_mpx_regnums_x86_64[] = { + // Note: we currently do not provide them but this is needed to avoid + // unnamed groups in SBFrame::GetRegisterContext(). + lldb_bnd0_x86_64, lldb_bnd1_x86_64, lldb_bnd2_x86_64, + lldb_bnd3_x86_64, lldb_bndcfgu_x86_64, lldb_bndstatus_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_mpx_regnums_x86_64) / sizeof(g_mpx_regnums_x86_64[0])) - + 1 == + k_num_mpx_registers_x86_64, + "g_mpx_regnums_x86_64 has wrong number of register infos"); + +// x86 debug registers. +static const uint32_t g_dbr_regnums_x86_64[] = { + lldb_dr0_x86_64, lldb_dr1_x86_64, lldb_dr2_x86_64, lldb_dr3_x86_64, + lldb_dr4_x86_64, lldb_dr5_x86_64, lldb_dr6_x86_64, lldb_dr7_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_dbr_regnums_x86_64) / sizeof(g_dbr_regnums_x86_64[0])) - + 1 == + k_num_dbr_registers_x86_64, + "g_dbr_regnums_x86_64 has wrong number of register infos"); + +// x86 32-bit general purpose registers. +static const uint32_t g_gpr_regnums_i386[] = { + lldb_eax_i386, lldb_ebx_i386, lldb_ecx_i386, lldb_edx_i386, + lldb_edi_i386, lldb_esi_i386, lldb_ebp_i386, lldb_esp_i386, + lldb_eip_i386, lldb_eflags_i386, lldb_cs_i386, lldb_fs_i386, + lldb_gs_i386, lldb_ss_i386, lldb_ds_i386, lldb_es_i386, + lldb_ax_i386, lldb_bx_i386, lldb_cx_i386, lldb_dx_i386, + lldb_di_i386, lldb_si_i386, lldb_bp_i386, lldb_sp_i386, + lldb_ah_i386, lldb_bh_i386, lldb_ch_i386, lldb_dh_i386, + lldb_al_i386, lldb_bl_i386, lldb_cl_i386, lldb_dl_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_gpr_regnums_i386) / sizeof(g_gpr_regnums_i386[0])) - + 1 == + k_num_gpr_registers_i386, + "g_gpr_regnums_i386 has wrong number of register infos"); + +// x86 32-bit floating point registers. +static const uint32_t g_fpu_regnums_i386[] = { + lldb_fctrl_i386, lldb_fstat_i386, lldb_ftag_i386, lldb_fop_i386, + lldb_fiseg_i386, lldb_fioff_i386, lldb_foseg_i386, lldb_fooff_i386, + lldb_mxcsr_i386, lldb_mxcsrmask_i386, lldb_st0_i386, lldb_st1_i386, + lldb_st2_i386, lldb_st3_i386, lldb_st4_i386, lldb_st5_i386, + lldb_st6_i386, lldb_st7_i386, lldb_mm0_i386, lldb_mm1_i386, + lldb_mm2_i386, lldb_mm3_i386, lldb_mm4_i386, lldb_mm5_i386, + lldb_mm6_i386, lldb_mm7_i386, lldb_xmm0_i386, lldb_xmm1_i386, + lldb_xmm2_i386, lldb_xmm3_i386, lldb_xmm4_i386, lldb_xmm5_i386, + lldb_xmm6_i386, lldb_xmm7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_fpu_regnums_i386) / sizeof(g_fpu_regnums_i386[0])) - + 1 == + k_num_fpr_registers_i386, + "g_fpu_regnums_i386 has wrong number of register infos"); + +static const uint32_t g_avx_regnums_i386[] = { + lldb_ymm0_i386, lldb_ymm1_i386, lldb_ymm2_i386, lldb_ymm3_i386, + lldb_ymm4_i386, lldb_ymm5_i386, lldb_ymm6_i386, lldb_ymm7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_avx_regnums_i386) / sizeof(g_avx_regnums_i386[0])) - + 1 == + k_num_avx_registers_i386, + "g_avx_regnums_i386 has wrong number of register infos"); + +static const uint32_t g_mpx_regnums_i386[] = { + // Note: we currently do not provide them but this is needed to avoid + // unnamed groups in SBFrame::GetRegisterContext(). + lldb_bnd0_i386, lldb_bnd1_i386, lldb_bnd2_i386, + lldb_bnd3_i386, lldb_bndcfgu_i386, lldb_bndstatus_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_mpx_regnums_i386) / sizeof(g_mpx_regnums_i386[0])) - + 1 == + k_num_mpx_registers_i386, + "g_mpx_regnums_i386 has wrong number of register infos"); + +// x86 debug registers. +static const uint32_t g_dbr_regnums_i386[] = { + lldb_dr0_i386, lldb_dr1_i386, lldb_dr2_i386, lldb_dr3_i386, + lldb_dr4_i386, lldb_dr5_i386, lldb_dr6_i386, lldb_dr7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_dbr_regnums_i386) / sizeof(g_dbr_regnums_i386[0])) - + 1 == + k_num_dbr_registers_i386, + "g_dbr_regnums_i386 has wrong number of register infos"); + +// Number of register sets provided by this context. +enum { k_num_register_sets = 5 }; + +// Register sets for x86 32-bit. +static const RegisterSet g_reg_sets_i386[k_num_register_sets] = { + {"General Purpose Registers", "gpr", k_num_gpr_registers_i386, + g_gpr_regnums_i386}, + {"Floating Point Registers", "fpu", k_num_fpr_registers_i386, + g_fpu_regnums_i386}, + {"Debug Registers", "dbr", k_num_dbr_registers_i386, g_dbr_regnums_i386}, + {"Advanced Vector Extensions", "avx", k_num_avx_registers_i386, + g_avx_regnums_i386}, + {"Memory Protection Extensions", "mpx", k_num_mpx_registers_i386, + g_mpx_regnums_i386}, +}; + +// 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}, + {"Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, + g_fpu_regnums_x86_64}, + {"Debug Registers", "dbr", k_num_dbr_registers_x86_64, + g_dbr_regnums_x86_64}, + {"Advanced Vector Extensions", "avx", k_num_avx_registers_x86_64, + g_avx_regnums_x86_64}, + {"Memory Protection Extensions", "mpx", k_num_mpx_registers_x86_64, + g_mpx_regnums_x86_64}, +}; + +#define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) + +NativeRegisterContextFreeBSD * +NativeRegisterContextFreeBSD::CreateHostNativeRegisterContextFreeBSD( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { + return new NativeRegisterContextFreeBSD_x86_64(target_arch, native_thread); +} + +// NativeRegisterContextFreeBSD_x86_64 members. + +static RegisterInfoInterface * +CreateRegisterInfoInterface(const ArchSpec &target_arch) { + if (HostInfo::GetArchitecture().GetAddressByteSize() == 4) { + // 32-bit hosts run with a RegisterContextFreeBSD_i386 context. + return new RegisterContextFreeBSD_i386(target_arch); + } else { + 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 RegisterContextFreeBSD_x86_64(target_arch); + } +} + +NativeRegisterContextFreeBSD_x86_64::NativeRegisterContextFreeBSD_x86_64( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) + : NativeRegisterContextRegisterInfo( + native_thread, CreateRegisterInfoInterface(target_arch)), + NativeRegisterContextDBReg_x86(native_thread), m_regset_offsets({0}) { + assert(m_gpr.size() == GetRegisterInfoInterface().GetGPRSize()); + std::array<uint32_t, MaxRegSet + 1> first_regnos; + + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + first_regnos[FPRegSet] = lldb_fctrl_i386; + first_regnos[DBRegSet] = lldb_dr0_i386; + break; + case llvm::Triple::x86_64: + first_regnos[FPRegSet] = lldb_fctrl_x86_64; + first_regnos[DBRegSet] = lldb_dr0_x86_64; + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + for (int i : {FPRegSet, DBRegSet}) + m_regset_offsets[i] = GetRegisterInfoInterface() + .GetRegisterInfo()[first_regnos[i]] + .byte_offset; +} + +uint32_t NativeRegisterContextFreeBSD_x86_64::GetRegisterSetCount() const { + return k_num_register_sets; +} + +const RegisterSet * +NativeRegisterContextFreeBSD_x86_64::GetRegisterSet(uint32_t set_index) const { + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + return &g_reg_sets_i386[set_index]; + case llvm::Triple::x86_64: + return &g_reg_sets_x86_64[set_index]; + default: + llvm_unreachable("Unhandled target architecture."); + } +} + +llvm::Optional<NativeRegisterContextFreeBSD_x86_64::RegSetKind> +NativeRegisterContextFreeBSD_x86_64::GetSetForNativeRegNum( + uint32_t reg_num) const { + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + if (reg_num >= k_first_gpr_i386 && reg_num <= k_last_gpr_i386) + return GPRegSet; + if (reg_num >= k_first_fpr_i386 && reg_num <= k_last_fpr_i386) + return FPRegSet; + if (reg_num >= k_first_avx_i386 && reg_num <= k_last_avx_i386) + return YMMRegSet; + if (reg_num >= k_first_mpxr_i386 && reg_num <= k_last_mpxr_i386) + return llvm::None; // MPXR + if (reg_num >= k_first_mpxc_i386 && reg_num <= k_last_mpxc_i386) + return llvm::None; // MPXC + if (reg_num >= k_first_dbr_i386 && reg_num <= k_last_dbr_i386) + return DBRegSet; // DBR + break; + case llvm::Triple::x86_64: + if (reg_num >= k_first_gpr_x86_64 && reg_num <= k_last_gpr_x86_64) + return GPRegSet; + if (reg_num >= k_first_fpr_x86_64 && reg_num <= k_last_fpr_x86_64) + return FPRegSet; + if (reg_num >= k_first_avx_x86_64 && reg_num <= k_last_avx_x86_64) + return YMMRegSet; + if (reg_num >= k_first_mpxr_x86_64 && reg_num <= k_last_mpxr_x86_64) + return llvm::None; // MPXR + if (reg_num >= k_first_mpxc_x86_64 && reg_num <= k_last_mpxc_x86_64) + return llvm::None; // MPXC + if (reg_num >= k_first_dbr_x86_64 && reg_num <= k_last_dbr_x86_64) + return DBRegSet; // DBR + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + llvm_unreachable("Register does not belong to any register set"); +} + +Status NativeRegisterContextFreeBSD_x86_64::ReadRegisterSet(RegSetKind set) { + switch (set) { + case GPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_GETREGS, m_thread.GetID(), + m_gpr.data()); + case FPRegSet: +#if defined(__x86_64__) + return NativeProcessFreeBSD::PtraceWrapper(PT_GETFPREGS, m_thread.GetID(), + m_fpr.data()); +#else + return NativeProcessFreeBSD::PtraceWrapper(PT_GETXMMREGS, m_thread.GetID(), + m_fpr.data()); +#endif + case DBRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_GETDBREGS, m_thread.GetID(), + m_dbr.data()); + case YMMRegSet: + case MPXRegSet: { + struct ptrace_xstate_info info; + Status ret = NativeProcessFreeBSD::PtraceWrapper( + PT_GETXSTATE_INFO, GetProcessPid(), &info, sizeof(info)); + if (!ret.Success()) + return ret; + + assert(info.xsave_mask & XFEATURE_ENABLED_X87); + assert(info.xsave_mask & XFEATURE_ENABLED_SSE); + + m_xsave_offsets[YMMRegSet] = LLDB_INVALID_XSAVE_OFFSET; + if (info.xsave_mask & XFEATURE_ENABLED_YMM_HI128) { + uint32_t eax, ecx, edx; + __get_cpuid_count(0x0D, 2, &eax, &m_xsave_offsets[YMMRegSet], &ecx, &edx); + } + + m_xsave.resize(info.xsave_len); + return NativeProcessFreeBSD::PtraceWrapper(PT_GETXSTATE, GetProcessPid(), + m_xsave.data(), m_xsave.size()); + } + } + llvm_unreachable("NativeRegisterContextFreeBSD_x86_64::ReadRegisterSet"); +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteRegisterSet(RegSetKind set) { + switch (set) { + case GPRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_SETREGS, m_thread.GetID(), + m_gpr.data()); + case FPRegSet: +#if defined(__x86_64__) + return NativeProcessFreeBSD::PtraceWrapper(PT_SETFPREGS, m_thread.GetID(), + m_fpr.data()); +#else + return NativeProcessFreeBSD::PtraceWrapper(PT_SETXMMREGS, m_thread.GetID(), + m_fpr.data()); +#endif + case DBRegSet: + return NativeProcessFreeBSD::PtraceWrapper(PT_SETDBREGS, m_thread.GetID(), + m_dbr.data()); + case YMMRegSet: + case MPXRegSet: + // ReadRegisterSet() must always be called before WriteRegisterSet(). + assert(m_xsave.size() > 0); + return NativeProcessFreeBSD::PtraceWrapper(PT_SETXSTATE, GetProcessPid(), + m_xsave.data(), m_xsave.size()); + } + llvm_unreachable("NativeRegisterContextFreeBSD_x86_64::WriteRegisterSet"); +} + +Status +NativeRegisterContextFreeBSD_x86_64::ReadRegister(const RegisterInfo *reg_info, + RegisterValue ®_value) { + Status error; + + if (!reg_info) { + error.SetErrorString("reg_info NULL"); + return error; + } + + 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; + } + + llvm::Optional<RegSetKind> opt_set = GetSetForNativeRegNum(reg); + if (!opt_set) { + // 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; + } + + RegSetKind set = opt_set.getValue(); + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + switch (set) { + case GPRegSet: + case FPRegSet: + case DBRegSet: { + void *data = GetOffsetRegSetData(set, reg_info->byte_offset); + FXSAVE *fpr = reinterpret_cast<FXSAVE *>(m_fpr.data()); + if (data == &fpr->ftag) // ftag + reg_value.SetUInt16( + AbridgedToFullTagWord(fpr->ftag, fpr->fstat, fpr->stmm)); + else + reg_value.SetBytes(data, reg_info->byte_size, endian::InlHostByteOrder()); + break; + } + case YMMRegSet: { + llvm::Optional<YMMSplitPtr> ymm_reg = GetYMMSplitReg(reg); + if (!ymm_reg) { + error.SetErrorStringWithFormat( + "register \"%s\" not supported by CPU/kernel", reg_info->name); + } else { + YMMReg ymm = XStateToYMM(ymm_reg->xmm, ymm_reg->ymm_hi); + reg_value.SetBytes(ymm.bytes, reg_info->byte_size, + endian::InlHostByteOrder()); + } + break; + } + case MPXRegSet: + llvm_unreachable("MPX regset should have returned error"); + } + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue ®_value) { + + Status error; + + if (!reg_info) { + error.SetErrorString("reg_info NULL"); + return error; + } + + 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; + } + + llvm::Optional<RegSetKind> opt_set = GetSetForNativeRegNum(reg); + if (!opt_set) { + // 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; + } + + RegSetKind set = opt_set.getValue(); + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + switch (set) { + case GPRegSet: + case FPRegSet: + case DBRegSet: { + void *data = GetOffsetRegSetData(set, reg_info->byte_offset); + FXSAVE *fpr = reinterpret_cast<FXSAVE *>(m_fpr.data()); + if (data == &fpr->ftag) // ftag + fpr->ftag = FullToAbridgedTagWord(reg_value.GetAsUInt16()); + else + ::memcpy(data, reg_value.GetBytes(), reg_value.GetByteSize()); + break; + } + case YMMRegSet: { + llvm::Optional<YMMSplitPtr> ymm_reg = GetYMMSplitReg(reg); + if (!ymm_reg) { + error.SetErrorStringWithFormat( + "register \"%s\" not supported by CPU/kernel", reg_info->name); + } else { + YMMReg ymm; + ::memcpy(ymm.bytes, reg_value.GetBytes(), reg_value.GetByteSize()); + YMMToXState(ymm, ymm_reg->xmm, ymm_reg->ymm_hi); + } + break; + } + case MPXRegSet: + llvm_unreachable("MPX regset should have returned error"); + } + + return WriteRegisterSet(set); +} + +Status NativeRegisterContextFreeBSD_x86_64::ReadAllRegisterValues( + lldb::DataBufferSP &data_sp) { + Status error; + + data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); + error = ReadRegisterSet(GPRegSet); + if (error.Fail()) + return error; + + uint8_t *dst = data_sp->GetBytes(); + ::memcpy(dst, m_gpr.data(), GetRegisterInfoInterface().GetGPRSize()); + dst += GetRegisterInfoInterface().GetGPRSize(); + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteAllRegisterValues( + const lldb::DataBufferSP &data_sp) { + Status error; + + if (!data_sp) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_x86_64::%s invalid data_sp provided", + __FUNCTION__); + return error; + } + + if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_x86_64::%s data_sp contained mismatched " + "data size, expected %zu, actual %" PRIu64, + __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); + return error; + } + + uint8_t *src = data_sp->GetBytes(); + if (src == nullptr) { + error.SetErrorStringWithFormat("NativeRegisterContextFreeBSD_x86_64::%s " + "DataBuffer::GetBytes() returned a null " + "pointer", + __FUNCTION__); + return error; + } + ::memcpy(m_gpr.data(), src, GetRegisterInfoInterface().GetGPRSize()); + + error = WriteRegisterSet(GPRegSet); + if (error.Fail()) + return error; + src += GetRegisterInfoInterface().GetGPRSize(); + + return error; +} + +llvm::Error NativeRegisterContextFreeBSD_x86_64::CopyHardwareWatchpointsFrom( + NativeRegisterContextFreeBSD &source) { + auto &r_source = static_cast<NativeRegisterContextFreeBSD_x86_64 &>(source); + // NB: This implicitly reads the whole dbreg set. + RegisterValue dr7; + Status res = r_source.ReadRegister(GetDR(7), dr7); + if (!res.Fail()) { + // copy dbregs only if any watchpoints were set + if ((dr7.GetAsUInt64() & 0xFF) == 0) + return llvm::Error::success(); + + m_dbr = r_source.m_dbr; + res = WriteRegisterSet(DBRegSet); + } + return res.ToError(); +} + +uint8_t * +NativeRegisterContextFreeBSD_x86_64::GetOffsetRegSetData(RegSetKind set, + size_t reg_offset) { + uint8_t *base; + switch (set) { + case GPRegSet: + base = m_gpr.data(); + break; + case FPRegSet: + base = m_fpr.data(); + break; + case DBRegSet: + base = m_dbr.data(); + break; + case YMMRegSet: + llvm_unreachable("GetRegSetData() is unsuitable for this regset."); + case MPXRegSet: + llvm_unreachable("MPX regset should have returned error"); + } + assert(reg_offset >= m_regset_offsets[set]); + return base + (reg_offset - m_regset_offsets[set]); +} + +llvm::Optional<NativeRegisterContextFreeBSD_x86_64::YMMSplitPtr> +NativeRegisterContextFreeBSD_x86_64::GetYMMSplitReg(uint32_t reg) { + uint32_t offset = m_xsave_offsets[YMMRegSet]; + if (offset == LLDB_INVALID_XSAVE_OFFSET) + return llvm::None; + + uint32_t reg_index; + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + reg_index = reg - lldb_ymm0_i386; + break; + case llvm::Triple::x86_64: + reg_index = reg - lldb_ymm0_x86_64; + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + auto *fpreg = reinterpret_cast<struct savexmm_ymm *>(m_xsave.data()); + auto *ymmreg = reinterpret_cast<struct ymmacc *>(m_xsave.data() + offset); + + return YMMSplitPtr{&fpreg->sv_xmm[reg_index], &ymmreg[reg_index]}; +} + +#endif // defined(__x86_64__) |