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RegisterContextOpenBSD_i386.cpp
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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 
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 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
54 #define DECLARE_REGISTER_INFOS_I386_STRUCT
55 #include "RegisterInfos_i386.h"
56 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
57 
59  const ArchSpec &target_arch)
60  : RegisterInfoInterface(target_arch) {}
61 
62 size_t RegisterContextOpenBSD_i386::GetGPRSize() const { return sizeof(GPR); }
63 
64 const RegisterInfo *RegisterContextOpenBSD_i386::GetRegisterInfo() const {
65  switch (m_target_arch.GetMachine()) {
66  case llvm::Triple::x86:
67  return g_register_infos_i386;
68  default:
69  assert(false && "Unhandled target architecture.");
70  return NULL;
71  }
72 }
73 
75  return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
76  sizeof(g_register_infos_i386[0]));
77 }
uint32_t GetRegisterCount() const override
Enumerations for broadcasting.
Definition: SBLaunchInfo.h:14
RegisterInfo interface to patch RegisterInfo structure for archs.
const lldb_private::RegisterInfo * GetRegisterInfo() const override
RegisterContextOpenBSD_i386(const lldb_private::ArchSpec &target_arch)
An architecture specification class.
Definition: ArchSpec.h:32
struct _GPR GPR
Definition: SBAddress.h:15
llvm::Triple::ArchType GetMachine() const
Returns a machine family for the current architecture.
Definition: ArchSpec.cpp:726