RegisterContextLinux_i386.cpp
4.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
//===-- RegisterContextLinux_i386.cpp --------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
#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",
nullptr,
sizeof(((GPR *)nullptr)->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 nullptr;
}
}
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;
}