1 //===-- RegisterContextFreeBSD_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 "RegisterContextPOSIX_x86.h"
11 #include "RegisterContextFreeBSD_i386.h"
12 
13 using namespace lldb_private;
14 using namespace lldb;
15 
16 // http://svnweb.freebsd.org/base/head/sys/x86/include/reg.h
17 struct GPR
18 {
19     uint32_t fs;
20     uint32_t es;
21     uint32_t ds;
22     uint32_t edi;
23     uint32_t esi;
24     uint32_t ebp;
25     uint32_t isp;
26     uint32_t ebx;
27     uint32_t edx;
28     uint32_t ecx;
29     uint32_t eax;
30     uint32_t trapno;
31     uint32_t err;
32     uint32_t eip;
33     uint32_t cs;
34     uint32_t eflags;
35     uint32_t esp;
36     uint32_t ss;
37     uint32_t gs;
38 };
39 
40 struct dbreg {
41     uint32_t  dr[8];     /* debug registers */
42                          /* Index 0-3: debug address registers */
43                          /* Index 4-5: reserved */
44                          /* Index 6: debug status */
45                          /* Index 7: debug control */
46 };
47 
48 using FPR_i386 = FXSAVE;
49 
50 struct UserArea
51 {
52     GPR gpr;
53     FPR_i386 i387;
54 };
55 
56 #define DR_SIZE sizeof(uint32_t)
57 #define DR_OFFSET(reg_index) \
58     (LLVM_EXTENSION offsetof(dbreg, dr[reg_index]))
59 
60 //---------------------------------------------------------------------------
61 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
62 //---------------------------------------------------------------------------
63 #define DECLARE_REGISTER_INFOS_I386_STRUCT
64 #include "RegisterInfos_i386.h"
65 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
66 
67 RegisterContextFreeBSD_i386::RegisterContextFreeBSD_i386(const ArchSpec &target_arch) :
68     RegisterInfoInterface(target_arch)
69 {
70 }
71 
72 size_t
73 RegisterContextFreeBSD_i386::GetGPRSize() const
74 {
75     return sizeof(GPR);
76 }
77 
78 const RegisterInfo *
79 RegisterContextFreeBSD_i386::GetRegisterInfo() const
80 {
81     switch (m_target_arch.GetMachine())
82     {
83         case llvm::Triple::x86:
84             return g_register_infos_i386;
85         default:
86             assert(false && "Unhandled target architecture.");
87             return NULL;
88     }
89 }
90 
91 uint32_t
92 RegisterContextFreeBSD_i386::GetRegisterCount () const
93 {
94     return static_cast<uint32_t> (sizeof (g_register_infos_i386) / sizeof (g_register_infos_i386 [0]));
95 }
96