1//===-- RegisterContextNetBSD_i386.cpp --------------------------*- C++ -*-===//
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
9#include "RegisterContextNetBSD_i386.h"
10#include "RegisterContextPOSIX_x86.h"
11
12using namespace lldb_private;
13using namespace lldb;
14
15// this needs to match 'struct reg'
16struct GPR {
17 uint32_t eax;
18 uint32_t ecx;
19 uint32_t edx;
20 uint32_t ebx;
21 uint32_t esp;
22 uint32_t ebp;
23 uint32_t esi;
24 uint32_t edi;
25 uint32_t eip;
26 uint32_t eflags;
27 uint32_t cs;
28 uint32_t ss;
29 uint32_t ds;
30 uint32_t es;
31 uint32_t fs;
32 uint32_t gs;
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
44 } x86_64;
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
57 uint32_t padding[56];
58};
59
60struct UserArea {
61 GPR gpr;
62 FPR_i386 i387;
63 uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
64 uint32_t tlsbase;
65};
66
67#define DR_SIZE sizeof(((UserArea *)NULL)->u_debugreg[0])
68#define DR_OFFSET(reg_index) \
69 (LLVM_EXTENSION offsetof(UserArea, u_debugreg[reg_index]))
70
71// Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
72#define DECLARE_REGISTER_INFOS_I386_STRUCT
73#include "RegisterInfos_i386.h"
74#undef DECLARE_REGISTER_INFOS_I386_STRUCT
75
76RegisterContextNetBSD_i386::RegisterContextNetBSD_i386(
77 const ArchSpec &target_arch)
78 : RegisterInfoInterface(target_arch) {}
79
80size_t RegisterContextNetBSD_i386::GetGPRSize() const { return sizeof(GPR); }
81
82const RegisterInfo *RegisterContextNetBSD_i386::GetRegisterInfo() const {
83 switch (GetTargetArchitecture().GetMachine()) {
84 case llvm::Triple::x86:
85 case llvm::Triple::x86_64:
86 return g_register_infos_i386;
87 default:
88 assert(false && "Unhandled target architecture.");
89 return nullptr;
90 }
91}
92
93uint32_t RegisterContextNetBSD_i386::GetRegisterCount() const {
94 return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
95 sizeof(g_register_infos_i386[0]));
96}
97

source code of lldb/source/Plugins/Process/Utility/RegisterContextNetBSD_i386.cpp