1 //===-- RegisterContextOpenBSD_i386.cpp ------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===---------------------------------------------------------------------===//
9 
10 #include "RegisterContextOpenBSD_i386.h"
11 #include "RegisterContextPOSIX_x86.h"
12 
13 using namespace lldb_private;
14 using namespace lldb;
15 
16 // /usr/include/machine/reg.h
17 struct GPR {
18   uint32_t eax;
19   uint32_t ecx;
20   uint32_t edx;
21   uint32_t ebx;
22   uint32_t esp;
23   uint32_t ebp;
24   uint32_t esi;
25   uint32_t edi;
26   uint32_t eip;
27   uint32_t eflags;
28   uint32_t cs;
29   uint32_t ss;
30   uint32_t ds;
31   uint32_t es;
32   uint32_t fs;
33   uint32_t gs;
34 };
35 
36 struct dbreg {
37   uint32_t dr[8]; /* debug registers */
38                   /* Index 0-3: debug address registers */
39                   /* Index 4-5: reserved */
40                   /* Index 6: debug status */
41                   /* Index 7: debug control */
42 };
43 
44 using FPR_i386 = FXSAVE;
45 
46 struct UserArea {
47   GPR gpr;
48   FPR_i386 i387;
49 };
50 
51 #define DR_SIZE sizeof(uint32_t)
52 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(dbreg, dr[reg_index]))
53 
54 //---------------------------------------------------------------------------
55 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
56 //---------------------------------------------------------------------------
57 #define DECLARE_REGISTER_INFOS_I386_STRUCT
58 #include "RegisterInfos_i386.h"
59 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
60 
61 RegisterContextOpenBSD_i386::RegisterContextOpenBSD_i386(
62     const ArchSpec &target_arch)
63     : RegisterInfoInterface(target_arch) {}
64 
65 size_t RegisterContextOpenBSD_i386::GetGPRSize() const { return sizeof(GPR); }
66 
67 const RegisterInfo *RegisterContextOpenBSD_i386::GetRegisterInfo() const {
68   switch (m_target_arch.GetMachine()) {
69   case llvm::Triple::x86:
70     return g_register_infos_i386;
71   default:
72     assert(false && "Unhandled target architecture.");
73     return NULL;
74   }
75 }
76 
77 uint32_t RegisterContextOpenBSD_i386::GetRegisterCount() const {
78   return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
79                                sizeof(g_register_infos_i386[0]));
80 }
81