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
13 using namespace lldb_private;
14
RegisterNumber(lldb_private::Thread & thread,lldb::RegisterKind kind,uint32_t num)15 RegisterNumber::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
RegisterNumber()29 RegisterNumber::RegisterNumber() : m_reg_ctx_sp(), m_kind_regnum_map() {}
30
init(lldb_private::Thread & thread,lldb::RegisterKind kind,uint32_t num)31 void 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
operator =(const RegisterNumber & rhs)46 const 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 m_kind_regnum_map.clear();
51 for (auto it : rhs.m_kind_regnum_map)
52 m_kind_regnum_map[it.first] = it.second;
53 m_name = rhs.m_name;
54 return *this;
55 }
56
operator ==(RegisterNumber & rhs)57 bool RegisterNumber::operator==(RegisterNumber &rhs) {
58 if (IsValid() != rhs.IsValid())
59 return false;
60
61 if (m_kind == rhs.m_kind) {
62 return m_regnum == rhs.m_regnum;
63 }
64
65 uint32_t rhs_regnum = rhs.GetAsKind(m_kind);
66 if (rhs_regnum != LLDB_INVALID_REGNUM) {
67 return m_regnum == rhs_regnum;
68 }
69 uint32_t lhs_regnum = GetAsKind(rhs.m_kind);
70 { return lhs_regnum == rhs.m_regnum; }
71 return false;
72 }
73
operator !=(RegisterNumber & rhs)74 bool RegisterNumber::operator!=(RegisterNumber &rhs) { return !(*this == rhs); }
75
IsValid() const76 bool RegisterNumber::IsValid() const {
77 return m_reg_ctx_sp.get() && m_kind != lldb::kNumRegisterKinds &&
78 m_regnum != LLDB_INVALID_REGNUM;
79 }
80
GetAsKind(lldb::RegisterKind kind)81 uint32_t RegisterNumber::GetAsKind(lldb::RegisterKind kind) {
82 if (m_regnum == LLDB_INVALID_REGNUM)
83 return LLDB_INVALID_REGNUM;
84
85 if (kind == m_kind)
86 return m_regnum;
87
88 Collection::iterator iter = m_kind_regnum_map.find(kind);
89 if (iter != m_kind_regnum_map.end()) {
90 return iter->second;
91 }
92 uint32_t output_regnum = LLDB_INVALID_REGNUM;
93 if (m_reg_ctx_sp &&
94 m_reg_ctx_sp->ConvertBetweenRegisterKinds(m_kind, m_regnum, kind,
95 output_regnum) &&
96 output_regnum != LLDB_INVALID_REGNUM) {
97 m_kind_regnum_map[kind] = output_regnum;
98 }
99 return output_regnum;
100 }
101
GetRegisterNumber() const102 uint32_t RegisterNumber::GetRegisterNumber() const { return m_regnum; }
103
GetRegisterKind() const104 lldb::RegisterKind RegisterNumber::GetRegisterKind() const { return m_kind; }
105
GetName()106 const char *RegisterNumber::GetName() { return m_name; }
107