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 reg: GetAsKind(kind: 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 reg: GetAsKind(kind: 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(kind: m_kind);
65 if (rhs_regnum != LLDB_INVALID_REGNUM) {
66 return m_regnum == rhs_regnum;
67 }
68 uint32_t lhs_regnum = GetAsKind(kind: 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(x: 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(source_rk: m_kind, source_regnum: m_regnum, target_rk: kind,
94 target_regnum&: 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

source code of lldb/source/Target/RegisterNumber.cpp