1//===-- RegisterContextFreeBSD_i386.cpp -----------------------------------===//
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
12using namespace lldb_private;
13using namespace lldb;
14
15// http://svnweb.freebsd.org/base/head/sys/x86/include/reg.h
16struct 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
38struct DBG {
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
46using FPR_i386 = FXSAVE;
47
48struct UserArea {
49  GPR gpr;
50  FPR_i386 i387;
51  DBG dbg;
52};
53
54#define DR_SIZE sizeof(uint32_t)
55#define DR_OFFSET(reg_index)                                                   \
56  (LLVM_EXTENSION offsetof(UserArea, dbg) +                                    \
57   LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
58
59// Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
60#define DECLARE_REGISTER_INFOS_I386_STRUCT
61#include "RegisterInfos_i386.h"
62#undef DECLARE_REGISTER_INFOS_I386_STRUCT
63
64RegisterContextFreeBSD_i386::RegisterContextFreeBSD_i386(
65    const ArchSpec &target_arch)
66    : RegisterInfoInterface(target_arch) {}
67
68size_t RegisterContextFreeBSD_i386::GetGPRSize() const { return sizeof(GPR); }
69
70const RegisterInfo *RegisterContextFreeBSD_i386::GetRegisterInfo() const {
71  switch (GetTargetArchitecture().GetMachine()) {
72  case llvm::Triple::x86:
73    return g_register_infos_i386;
74  default:
75    assert(false && "Unhandled target architecture.");
76    return nullptr;
77  }
78}
79
80uint32_t RegisterContextFreeBSD_i386::GetRegisterCount() const {
81  return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
82                               sizeof(g_register_infos_i386[0]));
83}
84