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RegisterContextLinux_i386.cpp
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1//===-- RegisterContextLinux_i386.cpp -------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===---------------------------------------------------------------------===//
8
11
12using namespace lldb_private;
13using namespace lldb;
14
15struct GPR {
33};
34
35struct FPR_i386 {
36 uint16_t fctrl; // FPU Control Word (fcw)
37 uint16_t fstat; // FPU Status Word (fsw)
38 uint16_t ftag; // FPU Tag Word (ftw)
39 uint16_t fop; // Last Instruction Opcode (fop)
40 union {
41 struct {
42 uint64_t fip; // Instruction Pointer
43 uint64_t fdp; // Data Pointer
45 struct {
46 uint32_t fioff; // FPU IP Offset (fip)
47 uint32_t fiseg; // FPU IP Selector (fcs)
48 uint32_t fooff; // FPU Operand Pointer Offset (foo)
49 uint32_t foseg; // FPU Operand Pointer Selector (fos)
50 } i386_; // Added _ in the end to avoid error with gcc defining i386 in some
51 // cases
52 } ptr;
53 uint32_t mxcsr; // MXCSR Register State
54 uint32_t mxcsrmask; // MXCSR Mask
55 MMSReg stmm[8]; // 8*16 bytes for each FP-reg = 128 bytes
56 XMMReg xmm[8]; // 8*16 bytes for each XMM-reg = 128 bytes
58};
59
60struct UserArea {
61 GPR regs; // General purpose registers.
62 int32_t fpvalid; // True if FPU is being used.
63 FPR_i386 i387; // FPU registers.
64 uint32_t tsize; // Text segment size.
65 uint32_t dsize; // Data segment size.
66 uint32_t ssize; // Stack segment size.
67 uint32_t start_code; // VM address of text.
68 uint32_t start_stack; // VM address of stack bottom (top in rsp).
69 int32_t signal; // Signal causing core dump.
70 int32_t reserved; // Unused.
71 uint32_t ar0; // Location of GPR's.
72 uint32_t fpstate; // Location of FPR's. Should be a FXSTATE *, but this
73 // has to be 32-bits even on 64-bit systems.
74 uint32_t magic; // Identifier for core dumps.
75 char u_comm[32]; // Command causing core dump.
76 uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
77};
78
79#define DR_SIZE sizeof(((UserArea *)NULL)->u_debugreg[0])
80#define DR_0_OFFSET 0xFC
81#define DR_OFFSET(reg_index) (DR_0_OFFSET + (reg_index * 4))
82#define FPR_SIZE(reg) sizeof(((FPR_i386 *)NULL)->reg)
83
84// Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
85#define DECLARE_REGISTER_INFOS_I386_STRUCT
86#include "RegisterInfos_i386.h"
87#undef DECLARE_REGISTER_INFOS_I386_STRUCT
88
90 const ArchSpec &target_arch)
91 : RegisterInfoInterface(target_arch) {
92 RegisterInfo orig_ax = {
93 "orig_eax",
94 nullptr,
95 sizeof(((GPR *)nullptr)->orig_eax),
96 (LLVM_EXTENSION offsetof(GPR, orig_eax)),
101 nullptr,
102 nullptr,
103 };
104 d_register_infos.push_back(orig_ax);
105}
106
108
110 switch (GetTargetArchitecture().GetMachine()) {
111 case llvm::Triple::x86:
112 case llvm::Triple::x86_64:
113 return g_register_infos_i386;
114 default:
115 assert(false && "Unhandled target architecture.");
116 return nullptr;
117 }
118}
119
121 return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
122 sizeof(g_register_infos_i386[0]));
123}
124
126 return static_cast<uint32_t>(k_num_user_registers_i386);
127}
128
129const std::vector<lldb_private::RegisterInfo> *
131 return &d_register_infos;
132}
uint32_t GetRegisterCount() const override
uint32_t GetUserRegisterCount() const override
std::vector< lldb_private::RegisterInfo > d_register_infos
const lldb_private::RegisterInfo * GetRegisterInfo() const override
RegisterContextLinux_i386(const lldb_private::ArchSpec &target_arch)
const std::vector< lldb_private::RegisterInfo > * GetDynamicRegisterInfoP() const override
An architecture specification class.
Definition: ArchSpec.h:32
RegisterInfo interface to patch RegisterInfo structure for archs.
const lldb_private::ArchSpec & GetTargetArchitecture() const
#define LLDB_INVALID_REGNUM
Definition: lldb-defines.h:79
A class that represents a running process on the host machine.
Definition: SBAttachInfo.h:14
Definition: SBAddress.h:15
@ eEncodingUint
unsigned integer
struct FPR_i386::@129::@130 x86_64
struct FPR_i386::@129::@131 i386_
union FPR_i386::@129 ptr