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RegisterContextNetBSD_x86_64.cpp
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1 //===-- RegisterContextNetBSD_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 "llvm/ADT/Triple.h"
12 #include "llvm/Support/Compiler.h"
13 #include <cassert>
14 #include <cstddef>
15 
16 using namespace lldb_private;
17 using namespace lldb;
18 
19 // src/sys/arch/amd64/include/frame_regs.h
20 typedef struct _GPR {
21  uint64_t rdi; /* 0 */
22  uint64_t rsi; /* 1 */
23  uint64_t rdx; /* 2 */
24  uint64_t rcx; /* 3 */
25  uint64_t r8; /* 4 */
26  uint64_t r9; /* 5 */
27  uint64_t r10; /* 6 */
28  uint64_t r11; /* 7 */
29  uint64_t r12; /* 8 */
30  uint64_t r13; /* 9 */
31  uint64_t r14; /* 10 */
32  uint64_t r15; /* 11 */
33  uint64_t rbp; /* 12 */
34  uint64_t rbx; /* 13 */
35  uint64_t rax; /* 14 */
36  uint64_t gs; /* 15 */
37  uint64_t fs; /* 16 */
38  uint64_t es; /* 17 */
39  uint64_t ds; /* 18 */
40  uint64_t trapno; /* 19 */
41  uint64_t err; /* 20 */
42  uint64_t rip; /* 21 */
43  uint64_t cs; /* 22 */
44  uint64_t rflags; /* 23 */
45  uint64_t rsp; /* 24 */
46  uint64_t ss; /* 25 */
47 } GPR;
48 
49 struct DBG {
50  uint64_t dr[16]; /* debug registers */
51  /* Index 0-3: debug address registers */
52  /* Index 4-5: reserved */
53  /* Index 6: debug status */
54  /* Index 7: debug control */
55  /* Index 8-15: reserved */
56 };
57 
58 /*
59  * src/sys/arch/amd64/include/mcontext.h
60  *
61  * typedef struct {
62  * __gregset_t __gregs;
63  * __greg_t _mc_tlsbase;
64  * __fpregset_t __fpregs;
65  * } mcontext_t;
66  */
67 
68 struct UserArea {
69  GPR gpr;
70  uint64_t mc_tlsbase;
71  FPR fpr;
72  DBG dbg;
73 };
74 
75 #define DR_OFFSET(reg_index) \
76  (LLVM_EXTENSION offsetof(UserArea, dbg) + \
77  LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
78 
79 
80 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
81 // structure.
82 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
83 #include "RegisterInfos_x86_64.h"
84 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
85 
86 static const RegisterInfo *
88  switch (target_arch.GetMachine()) {
89  case llvm::Triple::x86_64:
90  return g_register_infos_x86_64;
91  default:
92  assert(false && "Unhandled target architecture.");
93  return nullptr;
94  }
95 }
96 
97 static uint32_t
99  switch (target_arch.GetMachine()) {
100  case llvm::Triple::x86_64:
101  return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
102  sizeof(g_register_infos_x86_64[0]));
103  default:
104  assert(false && "Unhandled target architecture.");
105  return 0;
106  }
107 }
108 
110  const ArchSpec &target_arch)
111  : lldb_private::RegisterInfoInterface(target_arch),
112  m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),
113  m_register_count(PrivateGetRegisterCount(target_arch)) {}
114 
115 size_t RegisterContextNetBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }
116 
118  return m_register_info_p;
119 }
120 
122  return m_register_count;
123 }
Enumerations for broadcasting.
Definition: SBLaunchInfo.h:14
const lldb_private::RegisterInfo * GetRegisterInfo() const override
RegisterInfo interface to patch RegisterInfo structure for archs.
An architecture specification class.
Definition: ArchSpec.h:32
static uint32_t PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch)
struct _GPR GPR
Definition: SBAddress.h:15
RegisterContextNetBSD_x86_64(const lldb_private::ArchSpec &target_arch)
static const RegisterInfo * PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch)
llvm::Triple::ArchType GetMachine() const
Returns a machine family for the current architecture.
Definition: ArchSpec.cpp:726