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RegisterContextOpenBSD_x86_64.cpp
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1 //===-- RegisterContextOpenBSD_x86_64.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 #include <vector>
12 
13 using namespace lldb_private;
14 using namespace lldb;
15 
16 // /usr/include/machine/reg.h
17 typedef struct _GPR {
18  uint64_t rdi;
19  uint64_t rsi;
20  uint64_t rdx;
21  uint64_t rcx;
22  uint64_t r8;
23  uint64_t r9;
24  uint64_t r10;
25  uint64_t r11;
26  uint64_t r12;
27  uint64_t r13;
28  uint64_t r14;
29  uint64_t r15;
30  uint64_t rbp;
31  uint64_t rbx;
32  uint64_t rax;
33  uint64_t rsp;
34  uint64_t rip;
35  uint64_t rflags;
36  uint64_t cs;
37  uint64_t ss;
38  uint64_t ds;
39  uint64_t es;
40  uint64_t fs;
41  uint64_t gs;
42 } GPR;
43 
44 struct DBG {
45  uint64_t dr[16]; /* debug registers */
46  /* Index 0-3: debug address registers */
47  /* Index 4-5: reserved */
48  /* Index 6: debug status */
49  /* Index 7: debug control */
50  /* Index 8-15: reserved */
51 };
52 
53 struct UserArea {
54  GPR gpr;
55  FPR fpr;
56  DBG dbg;
57 };
58 
59 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
60 
61 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
62 // structure.
63 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
64 #include "RegisterInfos_x86_64.h"
65 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
66 
67 static const RegisterInfo *
69  switch (target_arch.GetMachine()) {
70  case llvm::Triple::x86_64:
71  return g_register_infos_x86_64;
72  default:
73  assert(false && "Unhandled target architecture.");
74  return nullptr;
75  }
76 }
77 
78 static uint32_t
80  switch (target_arch.GetMachine()) {
81  case llvm::Triple::x86_64:
82  return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
83  sizeof(g_register_infos_x86_64[0]));
84  default:
85  assert(false && "Unhandled target architecture.");
86  return 0;
87  }
88 }
89 
91  const ArchSpec &target_arch)
92  : lldb_private::RegisterInfoInterface(target_arch),
93  m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),
94  m_register_count(PrivateGetRegisterCount(target_arch)) {}
95 
96 size_t RegisterContextOpenBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }
97 
99  return m_register_info_p;
100 }
101 
103  return m_register_count;
104 }
Enumerations for broadcasting.
Definition: SBLaunchInfo.h:14
RegisterInfo interface to patch RegisterInfo structure for archs.
An architecture specification class.
Definition: ArchSpec.h:32
RegisterContextOpenBSD_x86_64(const lldb_private::ArchSpec &target_arch)
const lldb_private::RegisterInfo * GetRegisterInfo() const override
static const RegisterInfo * PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch)
struct _GPR GPR
static uint32_t PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch)
Definition: SBAddress.h:15
llvm::Triple::ArchType GetMachine() const
Returns a machine family for the current architecture.
Definition: ArchSpec.cpp:726