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