1//===-- RegisterNumber.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 "lldb/Target/RegisterNumber.h"
10#include "lldb/Target/RegisterContext.h"
11#include "lldb/Target/Thread.h"
12
13using namespace lldb_private;
14
15RegisterNumber::RegisterNumber(lldb_private::Thread &thread,
16                               lldb::RegisterKind kind, uint32_t num)
17    : m_reg_ctx_sp(thread.GetRegisterContext()), m_regnum(num), m_kind(kind),
18      m_kind_regnum_map(), m_name("") {
19  if (m_reg_ctx_sp.get()) {
20    const lldb_private::RegisterInfo *reginfo =
21        m_reg_ctx_sp->GetRegisterInfoAtIndex(
22            GetAsKind(lldb::eRegisterKindLLDB));
23    if (reginfo && reginfo->name) {
24      m_name = reginfo->name;
25    }
26  }
27}
28
29RegisterNumber::RegisterNumber() : m_reg_ctx_sp(), m_kind_regnum_map() {}
30
31void RegisterNumber::init(lldb_private::Thread &thread, lldb::RegisterKind kind,
32                          uint32_t num) {
33  m_reg_ctx_sp = thread.GetRegisterContext();
34  m_regnum = num;
35  m_kind = kind;
36  if (m_reg_ctx_sp.get()) {
37    const lldb_private::RegisterInfo *reginfo =
38        m_reg_ctx_sp->GetRegisterInfoAtIndex(
39            GetAsKind(lldb::eRegisterKindLLDB));
40    if (reginfo && reginfo->name) {
41      m_name = reginfo->name;
42    }
43  }
44}
45
46const RegisterNumber &RegisterNumber::operator=(const RegisterNumber &rhs) {
47  m_reg_ctx_sp = rhs.m_reg_ctx_sp;
48  m_regnum = rhs.m_regnum;
49  m_kind = rhs.m_kind;
50  for (auto it : rhs.m_kind_regnum_map)
51    m_kind_regnum_map[it.first] = it.second;
52  m_name = rhs.m_name;
53  return *this;
54}
55
56bool RegisterNumber::operator==(RegisterNumber &rhs) {
57  if (IsValid() != rhs.IsValid())
58    return false;
59
60  if (m_kind == rhs.m_kind) {
61    return m_regnum == rhs.m_regnum;
62  }
63
64  uint32_t rhs_regnum = rhs.GetAsKind(m_kind);
65  if (rhs_regnum != LLDB_INVALID_REGNUM) {
66    return m_regnum == rhs_regnum;
67  }
68  uint32_t lhs_regnum = GetAsKind(rhs.m_kind);
69  { return lhs_regnum == rhs.m_regnum; }
70  return false;
71}
72
73bool RegisterNumber::operator!=(RegisterNumber &rhs) { return !(*this == rhs); }
74
75bool RegisterNumber::IsValid() const {
76  return m_reg_ctx_sp.get() && m_kind != lldb::kNumRegisterKinds &&
77         m_regnum != LLDB_INVALID_REGNUM;
78}
79
80uint32_t RegisterNumber::GetAsKind(lldb::RegisterKind kind) {
81  if (m_regnum == LLDB_INVALID_REGNUM)
82    return LLDB_INVALID_REGNUM;
83
84  if (kind == m_kind)
85    return m_regnum;
86
87  Collection::iterator iter = m_kind_regnum_map.find(kind);
88  if (iter != m_kind_regnum_map.end()) {
89    return iter->second;
90  }
91  uint32_t output_regnum = LLDB_INVALID_REGNUM;
92  if (m_reg_ctx_sp &&
93      m_reg_ctx_sp->ConvertBetweenRegisterKinds(m_kind, m_regnum, kind,
94                                                output_regnum) &&
95      output_regnum != LLDB_INVALID_REGNUM) {
96    m_kind_regnum_map[kind] = output_regnum;
97  }
98  return output_regnum;
99}
100
101uint32_t RegisterNumber::GetRegisterNumber() const { return m_regnum; }
102
103lldb::RegisterKind RegisterNumber::GetRegisterKind() const { return m_kind; }
104
105const char *RegisterNumber::GetName() { return m_name; }
106