1 //===-- RegisterContextWindows_x86.cpp --------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/lldb-private-types.h" 11 #include "lldb/Core/Error.h" 12 #include "lldb/Core/RegisterValue.h" 13 #include "lldb/Host/windows/HostThreadWindows.h" 14 #include "lldb/Host/windows/windows.h" 15 16 #include "lldb-x86-register-enums.h" 17 #include "ProcessWindowsLog.h" 18 #include "RegisterContext_x86.h" 19 #include "RegisterContextWindows_x86.h" 20 21 #include "llvm/ADT/STLExtras.h" 22 23 using namespace lldb; 24 using namespace lldb_private; 25 26 #define DEFINE_GPR(reg, alt) #reg, alt, 4, 0, eEncodingUint, eFormatHexUppercase 27 #define DEFINE_GPR_BIN(reg, alt) #reg, alt, 4, 0, eEncodingUint, eFormatBinary 28 29 namespace 30 { 31 32 // This enum defines the layout of the global RegisterInfo array. This is necessary because 33 // lldb register sets are defined in terms of indices into the register array. As such, the 34 // order of RegisterInfos defined in global registers array must match the order defined here. 35 // When defining the register set layouts, these values can appear in an arbitrary order, and that 36 // determines the order that register values are displayed in a dump. 37 enum RegisterIndex 38 { 39 eRegisterIndexEax, 40 eRegisterIndexEbx, 41 eRegisterIndexEcx, 42 eRegisterIndexEdx, 43 eRegisterIndexEdi, 44 eRegisterIndexEsi, 45 eRegisterIndexEbp, 46 eRegisterIndexEsp, 47 eRegisterIndexEip, 48 eRegisterIndexEflags 49 }; 50 51 // Array of all register information supported by Windows x86 52 RegisterInfo g_register_infos[] = 53 { 54 // Macro auto defines most stuff eh_frame DWARF GENERIC GDB LLDB VALUE REGS INVALIDATE REGS 55 // ============================== ======================= =================== ========================= =================== ================= ========== =============== 56 { DEFINE_GPR(eax, nullptr), { ehframe_eax_i386, dwarf_eax_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_eax_i386 }, nullptr, nullptr}, 57 { DEFINE_GPR(ebx, nullptr), { ehframe_ebx_i386, dwarf_ebx_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_ebx_i386 }, nullptr, nullptr}, 58 { DEFINE_GPR(ecx, nullptr), { ehframe_ecx_i386, dwarf_ecx_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_ecx_i386 }, nullptr, nullptr}, 59 { DEFINE_GPR(edx, nullptr), { ehframe_edx_i386, dwarf_edx_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_edx_i386 }, nullptr, nullptr}, 60 { DEFINE_GPR(edi, nullptr), { ehframe_edi_i386, dwarf_edi_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_edi_i386 }, nullptr, nullptr}, 61 { DEFINE_GPR(esi, nullptr), { ehframe_esi_i386, dwarf_esi_i386, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, lldb_esi_i386 }, nullptr, nullptr}, 62 { DEFINE_GPR(ebp, "fp"), { ehframe_ebp_i386, dwarf_ebp_i386, LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM, lldb_ebp_i386 }, nullptr, nullptr}, 63 { DEFINE_GPR(esp, "sp"), { ehframe_esp_i386, dwarf_esp_i386, LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM, lldb_esp_i386 }, nullptr, nullptr}, 64 { DEFINE_GPR(eip, "pc"), { ehframe_eip_i386, dwarf_eip_i386, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM, lldb_eip_i386 }, nullptr, nullptr}, 65 { DEFINE_GPR_BIN(eflags, "flags"), { ehframe_eflags_i386, dwarf_eflags_i386, LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM, lldb_eflags_i386}, nullptr, nullptr}, 66 }; 67 static size_t k_num_register_infos = llvm::array_lengthof(g_register_infos); 68 69 // Array of lldb register numbers used to define the set of all General Purpose Registers 70 uint32_t g_gpr_reg_indices[] = 71 { 72 eRegisterIndexEax, 73 eRegisterIndexEbx, 74 eRegisterIndexEcx, 75 eRegisterIndexEdx, 76 eRegisterIndexEdi, 77 eRegisterIndexEsi, 78 eRegisterIndexEbp, 79 eRegisterIndexEsp, 80 eRegisterIndexEip, 81 eRegisterIndexEflags 82 }; 83 84 RegisterSet g_register_sets[] = { 85 {"General Purpose Registers", "gpr", llvm::array_lengthof(g_gpr_reg_indices), g_gpr_reg_indices}, 86 }; 87 } 88 89 //------------------------------------------------------------------ 90 // Constructors and Destructors 91 //------------------------------------------------------------------ 92 RegisterContextWindows_x86::RegisterContextWindows_x86(Thread &thread, uint32_t concrete_frame_idx) 93 : RegisterContextWindows(thread, concrete_frame_idx) 94 { 95 } 96 97 RegisterContextWindows_x86::~RegisterContextWindows_x86() 98 { 99 } 100 101 size_t 102 RegisterContextWindows_x86::GetRegisterCount() 103 { 104 return llvm::array_lengthof(g_register_infos); 105 } 106 107 const RegisterInfo * 108 RegisterContextWindows_x86::GetRegisterInfoAtIndex(size_t reg) 109 { 110 if (reg < k_num_register_infos) 111 return &g_register_infos[reg]; 112 return NULL; 113 } 114 115 size_t 116 RegisterContextWindows_x86::GetRegisterSetCount() 117 { 118 return llvm::array_lengthof(g_register_sets); 119 } 120 121 const RegisterSet * 122 RegisterContextWindows_x86::GetRegisterSet(size_t reg_set) 123 { 124 return &g_register_sets[reg_set]; 125 } 126 127 bool 128 RegisterContextWindows_x86::ReadRegister(const RegisterInfo *reg_info, RegisterValue ®_value) 129 { 130 if (!CacheAllRegisterValues()) 131 return false; 132 133 uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; 134 switch (reg) 135 { 136 case lldb_eax_i386: 137 return ReadRegisterHelper(CONTEXT_INTEGER, "EAX", m_context.Eax, reg_value); 138 case lldb_ebx_i386: 139 return ReadRegisterHelper(CONTEXT_INTEGER, "EBX", m_context.Ebx, reg_value); 140 case lldb_ecx_i386: 141 return ReadRegisterHelper(CONTEXT_INTEGER, "ECX", m_context.Ecx, reg_value); 142 case lldb_edx_i386: 143 return ReadRegisterHelper(CONTEXT_INTEGER, "EDX", m_context.Edx, reg_value); 144 case lldb_edi_i386: 145 return ReadRegisterHelper(CONTEXT_INTEGER, "EDI", m_context.Edi, reg_value); 146 case lldb_esi_i386: 147 return ReadRegisterHelper(CONTEXT_INTEGER, "ESI", m_context.Esi, reg_value); 148 case lldb_ebp_i386: 149 return ReadRegisterHelper(CONTEXT_CONTROL, "EBP", m_context.Ebp, reg_value); 150 case lldb_esp_i386: 151 return ReadRegisterHelper(CONTEXT_CONTROL, "ESP", m_context.Esp, reg_value); 152 case lldb_eip_i386: 153 return ReadRegisterHelper(CONTEXT_CONTROL, "EIP", m_context.Eip, reg_value); 154 case lldb_eflags_i386: 155 return ReadRegisterHelper(CONTEXT_CONTROL, "EFLAGS", m_context.EFlags, reg_value); 156 default: 157 WINWARN_IFALL(WINDOWS_LOG_REGISTERS, "Requested unknown register %u", reg); 158 break; 159 } 160 return false; 161 } 162 163 bool 164 RegisterContextWindows_x86::ReadRegisterHelper(DWORD flags_required, const char *reg_name, DWORD value, 165 RegisterValue ®_value) const 166 { 167 if ((m_context.ContextFlags & flags_required) != flags_required) 168 { 169 WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Thread context doesn't have %s", reg_name); 170 return false; 171 } 172 WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Read value 0x%x from %s", value, reg_name); 173 reg_value.SetUInt32(value); 174 return true; 175 } 176