1 //===-- RegisterContextLinux_i386.cpp --------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===---------------------------------------------------------------------===//
10 #include "RegisterContextPOSIX_x86.h"
11 #include "RegisterContextLinux_i386.h"
13 using namespace lldb_private;
39 uint16_t fctrl; // FPU Control Word (fcw)
40 uint16_t fstat; // FPU Status Word (fsw)
41 uint8_t ftag; // FPU Tag Word (ftw)
42 uint8_t reserved_1; // Reserved
43 uint16_t fop; // Last Instruction Opcode (fop)
48 uint64_t fip; // Instruction Pointer
49 uint64_t fdp; // Data Pointer
53 uint32_t fioff; // FPU IP Offset (fip)
54 uint32_t fiseg; // FPU IP Selector (fcs)
55 uint32_t fooff; // FPU Operand Pointer Offset (foo)
56 uint32_t foseg; // FPU Operand Pointer Selector (fos)
57 } i386_;// Added _ in the end to avoid error with gcc defining i386 in some cases
59 uint32_t mxcsr; // MXCSR Register State
60 uint32_t mxcsrmask; // MXCSR Mask
61 MMSReg stmm[8]; // 8*16 bytes for each FP-reg = 128 bytes
62 XMMReg xmm[8]; // 8*16 bytes for each XMM-reg = 128 bytes
68 GPR regs; // General purpose registers.
69 int32_t fpvalid; // True if FPU is being used.
70 FPR_i386 i387; // FPU registers.
71 uint32_t tsize; // Text segment size.
72 uint32_t dsize; // Data segment size.
73 uint32_t ssize; // Stack segment size.
74 uint32_t start_code; // VM address of text.
75 uint32_t start_stack; // VM address of stack bottom (top in rsp).
76 int32_t signal; // Signal causing core dump.
77 int32_t reserved; // Unused.
78 uint32_t ar0; // Location of GPR's.
79 uint32_t fpstate; // Location of FPR's. Should be a FXSTATE *, but this
80 // has to be 32-bits even on 64-bit systems.
81 uint32_t magic; // Identifier for core dumps.
82 char u_comm[32]; // Command causing core dump.
83 uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
86 #define DR_SIZE sizeof(((UserArea*)NULL)->u_debugreg[0])
87 #define DR_0_OFFSET 0xFC
88 #define DR_OFFSET(reg_index) \
89 (DR_0_OFFSET + (reg_index * 4))
90 #define FPR_SIZE(reg) sizeof(((FPR_i386*)NULL)->reg)
92 //---------------------------------------------------------------------------
93 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
94 //---------------------------------------------------------------------------
95 #define DECLARE_REGISTER_INFOS_I386_STRUCT
96 #include "RegisterInfos_i386.h"
97 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
99 RegisterContextLinux_i386::RegisterContextLinux_i386(const ArchSpec &target_arch) :
100 RegisterInfoInterface(target_arch)
102 RegisterInfo orig_ax = { "orig_eax", NULL, sizeof(((GPR*)NULL)->orig_eax), (LLVM_EXTENSION offsetof(GPR, orig_eax)), eEncodingUint, \
103 eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM }, NULL, NULL };
104 d_register_infos.push_back(orig_ax);
108 RegisterContextLinux_i386::GetGPRSize() const
114 RegisterContextLinux_i386::GetRegisterInfo() const
116 switch (m_target_arch.GetMachine())
118 case llvm::Triple::x86:
119 case llvm::Triple::x86_64:
120 return g_register_infos_i386;
122 assert(false && "Unhandled target architecture.");
128 RegisterContextLinux_i386::GetRegisterCount () const
130 return static_cast<uint32_t> (sizeof (g_register_infos_i386) / sizeof (g_register_infos_i386 [0]));
134 RegisterContextLinux_i386::GetUserRegisterCount () const
136 return static_cast<uint32_t> (k_num_user_registers_i386);
139 const std::vector<lldb_private::RegisterInfo> *
140 RegisterContextLinux_i386::GetDynamicRegisterInfoP() const
142 return &d_register_infos;