1 //===-- RegisterContextOpenBSD_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 "RegisterContextOpenBSD_i386.h"
10 #include "RegisterContextPOSIX_x86.h"
11 
12 using namespace lldb_private;
13 using namespace lldb;
14 
15 // /usr/include/machine/reg.h
16 struct 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 
35 struct dbreg {
36   uint32_t dr[8]; /* debug registers */
37                   /* Index 0-3: debug address registers */
38                   /* Index 4-5: reserved */
39                   /* Index 6: debug status */
40                   /* Index 7: debug control */
41 };
42 
43 using FPR_i386 = FXSAVE;
44 
45 struct UserArea {
46   GPR gpr;
47   FPR_i386 i387;
48 };
49 
50 #define DR_SIZE sizeof(uint32_t)
51 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(dbreg, dr[reg_index]))
52 
53 //---------------------------------------------------------------------------
54 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
55 //---------------------------------------------------------------------------
56 #define DECLARE_REGISTER_INFOS_I386_STRUCT
57 #include "RegisterInfos_i386.h"
58 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
59 
60 RegisterContextOpenBSD_i386::RegisterContextOpenBSD_i386(
61     const ArchSpec &target_arch)
62     : RegisterInfoInterface(target_arch) {}
63 
64 size_t RegisterContextOpenBSD_i386::GetGPRSize() const { return sizeof(GPR); }
65 
66 const RegisterInfo *RegisterContextOpenBSD_i386::GetRegisterInfo() const {
67   switch (m_target_arch.GetMachine()) {
68   case llvm::Triple::x86:
69     return g_register_infos_i386;
70   default:
71     assert(false && "Unhandled target architecture.");
72     return NULL;
73   }
74 }
75 
76 uint32_t RegisterContextOpenBSD_i386::GetRegisterCount() const {
77   return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
78                                sizeof(g_register_infos_i386[0]));
79 }
80