| //===-- RegisterContextLinux_i386.cpp --------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===---------------------------------------------------------------------===// |
| |
| #include "RegisterContextLinux_i386.h" |
| #include "RegisterContextPOSIX_x86.h" |
| |
| using namespace lldb_private; |
| using namespace lldb; |
| |
| struct GPR { |
| uint32_t ebx; |
| uint32_t ecx; |
| uint32_t edx; |
| uint32_t esi; |
| uint32_t edi; |
| uint32_t ebp; |
| uint32_t eax; |
| uint32_t ds; |
| uint32_t es; |
| uint32_t fs; |
| uint32_t gs; |
| uint32_t orig_eax; |
| uint32_t eip; |
| uint32_t cs; |
| uint32_t eflags; |
| uint32_t esp; |
| uint32_t ss; |
| }; |
| |
| struct FPR_i386 { |
| uint16_t fctrl; // FPU Control Word (fcw) |
| uint16_t fstat; // FPU Status Word (fsw) |
| uint16_t ftag; // FPU Tag Word (ftw) |
| uint16_t fop; // Last Instruction Opcode (fop) |
| union { |
| struct { |
| uint64_t fip; // Instruction Pointer |
| uint64_t fdp; // Data Pointer |
| } x86_64; |
| struct { |
| uint32_t fioff; // FPU IP Offset (fip) |
| uint32_t fiseg; // FPU IP Selector (fcs) |
| uint32_t fooff; // FPU Operand Pointer Offset (foo) |
| uint32_t foseg; // FPU Operand Pointer Selector (fos) |
| } i386_; // Added _ in the end to avoid error with gcc defining i386 in some |
| // cases |
| } ptr; |
| uint32_t mxcsr; // MXCSR Register State |
| uint32_t mxcsrmask; // MXCSR Mask |
| MMSReg stmm[8]; // 8*16 bytes for each FP-reg = 128 bytes |
| XMMReg xmm[8]; // 8*16 bytes for each XMM-reg = 128 bytes |
| uint32_t padding[56]; |
| }; |
| |
| struct UserArea { |
| GPR regs; // General purpose registers. |
| int32_t fpvalid; // True if FPU is being used. |
| FPR_i386 i387; // FPU registers. |
| uint32_t tsize; // Text segment size. |
| uint32_t dsize; // Data segment size. |
| uint32_t ssize; // Stack segment size. |
| uint32_t start_code; // VM address of text. |
| uint32_t start_stack; // VM address of stack bottom (top in rsp). |
| int32_t signal; // Signal causing core dump. |
| int32_t reserved; // Unused. |
| uint32_t ar0; // Location of GPR's. |
| uint32_t fpstate; // Location of FPR's. Should be a FXSTATE *, but this |
| // has to be 32-bits even on 64-bit systems. |
| uint32_t magic; // Identifier for core dumps. |
| char u_comm[32]; // Command causing core dump. |
| uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7). |
| }; |
| |
| #define DR_SIZE sizeof(((UserArea *)NULL)->u_debugreg[0]) |
| #define DR_0_OFFSET 0xFC |
| #define DR_OFFSET(reg_index) (DR_0_OFFSET + (reg_index * 4)) |
| #define FPR_SIZE(reg) sizeof(((FPR_i386 *)NULL)->reg) |
| |
| //--------------------------------------------------------------------------- |
| // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure. |
| //--------------------------------------------------------------------------- |
| #define DECLARE_REGISTER_INFOS_I386_STRUCT |
| #include "RegisterInfos_i386.h" |
| #undef DECLARE_REGISTER_INFOS_I386_STRUCT |
| |
| RegisterContextLinux_i386::RegisterContextLinux_i386( |
| const ArchSpec &target_arch) |
| : RegisterInfoInterface(target_arch) { |
| RegisterInfo orig_ax = {"orig_eax", |
| NULL, |
| sizeof(((GPR *)NULL)->orig_eax), |
| (LLVM_EXTENSION offsetof(GPR, orig_eax)), |
| eEncodingUint, |
| eFormatHex, |
| {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, |
| LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, |
| LLDB_INVALID_REGNUM}, |
| nullptr, |
| nullptr, |
| nullptr, |
| 0}; |
| d_register_infos.push_back(orig_ax); |
| } |
| |
| size_t RegisterContextLinux_i386::GetGPRSize() const { return sizeof(GPR); } |
| |
| const RegisterInfo *RegisterContextLinux_i386::GetRegisterInfo() const { |
| switch (m_target_arch.GetMachine()) { |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| return g_register_infos_i386; |
| default: |
| assert(false && "Unhandled target architecture."); |
| return NULL; |
| } |
| } |
| |
| uint32_t RegisterContextLinux_i386::GetRegisterCount() const { |
| return static_cast<uint32_t>(sizeof(g_register_infos_i386) / |
| sizeof(g_register_infos_i386[0])); |
| } |
| |
| uint32_t RegisterContextLinux_i386::GetUserRegisterCount() const { |
| return static_cast<uint32_t>(k_num_user_registers_i386); |
| } |
| |
| const std::vector<lldb_private::RegisterInfo> * |
| RegisterContextLinux_i386::GetDynamicRegisterInfoP() const { |
| return &d_register_infos; |
| } |