1 //===-- RegisterContextLinux_i386.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 "RegisterContextLinux_i386.h" 11 #include "RegisterContextPOSIX_x86.h" 12 13 using namespace lldb_private; 14 using namespace lldb; 15 16 struct GPR { 17 uint32_t ebx; 18 uint32_t ecx; 19 uint32_t edx; 20 uint32_t esi; 21 uint32_t edi; 22 uint32_t ebp; 23 uint32_t eax; 24 uint32_t ds; 25 uint32_t es; 26 uint32_t fs; 27 uint32_t gs; 28 uint32_t orig_eax; 29 uint32_t eip; 30 uint32_t cs; 31 uint32_t eflags; 32 uint32_t esp; 33 uint32_t ss; 34 }; 35 36 struct FPR_i386 { 37 uint16_t fctrl; // FPU Control Word (fcw) 38 uint16_t fstat; // FPU Status Word (fsw) 39 uint16_t ftag; // FPU Tag Word (ftw) 40 uint16_t fop; // Last Instruction Opcode (fop) 41 union { 42 struct { 43 uint64_t fip; // Instruction Pointer 44 uint64_t fdp; // Data Pointer 45 } x86_64; 46 struct { 47 uint32_t fioff; // FPU IP Offset (fip) 48 uint32_t fiseg; // FPU IP Selector (fcs) 49 uint32_t fooff; // FPU Operand Pointer Offset (foo) 50 uint32_t foseg; // FPU Operand Pointer Selector (fos) 51 } i386_; // Added _ in the end to avoid error with gcc defining i386 in some 52 // cases 53 } ptr; 54 uint32_t mxcsr; // MXCSR Register State 55 uint32_t mxcsrmask; // MXCSR Mask 56 MMSReg stmm[8]; // 8*16 bytes for each FP-reg = 128 bytes 57 XMMReg xmm[8]; // 8*16 bytes for each XMM-reg = 128 bytes 58 uint32_t padding[56]; 59 }; 60 61 struct UserArea { 62 GPR regs; // General purpose registers. 63 int32_t fpvalid; // True if FPU is being used. 64 FPR_i386 i387; // FPU registers. 65 uint32_t tsize; // Text segment size. 66 uint32_t dsize; // Data segment size. 67 uint32_t ssize; // Stack segment size. 68 uint32_t start_code; // VM address of text. 69 uint32_t start_stack; // VM address of stack bottom (top in rsp). 70 int32_t signal; // Signal causing core dump. 71 int32_t reserved; // Unused. 72 uint32_t ar0; // Location of GPR's. 73 uint32_t fpstate; // Location of FPR's. Should be a FXSTATE *, but this 74 // has to be 32-bits even on 64-bit systems. 75 uint32_t magic; // Identifier for core dumps. 76 char u_comm[32]; // Command causing core dump. 77 uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7). 78 }; 79 80 #define DR_SIZE sizeof(((UserArea *)NULL)->u_debugreg[0]) 81 #define DR_0_OFFSET 0xFC 82 #define DR_OFFSET(reg_index) (DR_0_OFFSET + (reg_index * 4)) 83 #define FPR_SIZE(reg) sizeof(((FPR_i386 *)NULL)->reg) 84 85 //--------------------------------------------------------------------------- 86 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure. 87 //--------------------------------------------------------------------------- 88 #define DECLARE_REGISTER_INFOS_I386_STRUCT 89 #include "RegisterInfos_i386.h" 90 #undef DECLARE_REGISTER_INFOS_I386_STRUCT 91 92 RegisterContextLinux_i386::RegisterContextLinux_i386( 93 const ArchSpec &target_arch) 94 : RegisterInfoInterface(target_arch) { 95 RegisterInfo orig_ax = {"orig_eax", 96 NULL, 97 sizeof(((GPR *)NULL)->orig_eax), 98 (LLVM_EXTENSION offsetof(GPR, orig_eax)), 99 eEncodingUint, 100 eFormatHex, 101 {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 102 LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 103 LLDB_INVALID_REGNUM}, 104 nullptr, 105 nullptr, 106 nullptr, 107 0}; 108 d_register_infos.push_back(orig_ax); 109 } 110 111 size_t RegisterContextLinux_i386::GetGPRSize() const { return sizeof(GPR); } 112 113 const RegisterInfo *RegisterContextLinux_i386::GetRegisterInfo() const { 114 switch (m_target_arch.GetMachine()) { 115 case llvm::Triple::x86: 116 case llvm::Triple::x86_64: 117 return g_register_infos_i386; 118 default: 119 assert(false && "Unhandled target architecture."); 120 return NULL; 121 } 122 } 123 124 uint32_t RegisterContextLinux_i386::GetRegisterCount() const { 125 return static_cast<uint32_t>(sizeof(g_register_infos_i386) / 126 sizeof(g_register_infos_i386[0])); 127 } 128 129 uint32_t RegisterContextLinux_i386::GetUserRegisterCount() const { 130 return static_cast<uint32_t>(k_num_user_registers_i386); 131 } 132 133 const std::vector<lldb_private::RegisterInfo> * 134 RegisterContextLinux_i386::GetDynamicRegisterInfoP() const { 135 return &d_register_infos; 136 } 137