diff options
Diffstat (limited to 'lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp | 138 |
1 files changed, 111 insertions, 27 deletions
diff --git a/lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp b/lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp index 6cc2810fa235..05a35401da46 100644 --- a/lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp +++ b/lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.cpp @@ -84,13 +84,71 @@ static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - 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_foseg_x86_64, lldb_fooff_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"); + +// x86 64-bit registers available via XState. +static const uint32_t g_xstate_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, + // 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_xstate_regnums_x86_64) / sizeof(g_xstate_regnums_x86_64[0])) - + 1 == + k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, + "g_xstate_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"); + // Number of register sets provided by this context. -enum { k_num_extended_register_sets = 2, k_num_register_sets = 4 }; +enum { 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}, + {"Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, + g_fpu_regnums_x86_64}, + {"Extended State Registers", "xstate", + k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, + g_xstate_regnums_x86_64}, + {"Debug Registers", "dbr", k_num_dbr_registers_x86_64, + g_dbr_regnums_x86_64}, }; #define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) @@ -667,11 +725,6 @@ Status NativeRegisterContextNetBSD_x86_64::ReadAllRegisterValues( ::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; } @@ -795,10 +848,10 @@ Status NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( 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); + RegisterValue dr7_value; + error = ReadRegister(reg_info_dr7, dr7_value); if (error.Fail()) return error; @@ -816,16 +869,28 @@ Status NativeRegisterContextNetBSD_x86_64::SetHardwareWatchpointWithIndex( uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); - uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; + uint64_t control_bits = dr7_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)); + RegisterValue drN_value; + error = ReadRegister(reg_info_drN, drN_value); if (error.Fail()) return error; + // clear dr6 if address or bits changed (i.e. we're not reenabling the same + // watchpoint) + if (drN_value.GetAsUInt64() != addr || + (dr7_value.GetAsUInt64() & bit_mask) != (rw_bits | size_bits)) { + ClearWatchpointHit(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; @@ -839,32 +904,36 @@ bool NativeRegisterContextNetBSD_x86_64::ClearHardwareWatchpoint( if (wp_index >= NumSupportedHardwareWatchpoints()) return false; + // for watchpoints 0, 1, 2, or 3, respectively, clear bits 0-1, 2-3, 4-5 + // or 6-7 of the debug control register (DR7) + const RegisterInfo *const reg_info_dr7 = + GetRegisterInfoAtIndex(lldb_dr7_x86_64); RegisterValue reg_value; + Status error = ReadRegister(reg_info_dr7, reg_value); + if (error.Fail()) + return false; + uint64_t bit_mask = 0x3 << (2 * wp_index); + uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; - // for watchpoints 0, 1, 2, or 3, respectively, clear bits 0, 1, 2, or 3 of + return WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); +} + +Status NativeRegisterContextNetBSD_x86_64::ClearWatchpointHit(uint32_t wp_index) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return Status("Watchpoint index out of range"); + + // for watchpoints 0, 1, 2, or 3, respectively, check bits 0, 1, 2, or 3 of // the debug status register (DR6) const RegisterInfo *const reg_info_dr6 = GetRegisterInfoAtIndex(lldb_dr6_x86_64); + RegisterValue reg_value; Status error = ReadRegister(reg_info_dr6, reg_value); if (error.Fail()) - return false; + return error; + 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(); + return WriteRegister(reg_info_dr6, RegisterValue(status_bits)); } Status NativeRegisterContextNetBSD_x86_64::ClearAllHardwareWatchpoints() { @@ -930,4 +999,19 @@ uint32_t NativeRegisterContextNetBSD_x86_64::NumSupportedHardwareWatchpoints() { return 4; } +Status NativeRegisterContextNetBSD_x86_64::CopyHardwareWatchpointsFrom( + NativeRegisterContextNetBSD &source) { + auto &r_source = static_cast<NativeRegisterContextNetBSD_x86_64&>(source); + Status res = r_source.ReadRegisterSet(DBRegSet); + if (!res.Fail()) { + // copy dbregs only if any watchpoints were set + if ((r_source.m_dbr_x86_64.dr[7] & 0xFF) == 0) + return res; + + m_dbr_x86_64 = r_source.m_dbr_x86_64; + res = WriteRegisterSet(DBRegSet); + } + return res; +} + #endif // defined(__x86_64__) |