1 //===-- RegisterContextPOSIX_mips64.cpp -------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include <cstring>
11 #include <errno.h>
12 #include <stdint.h>
13 
14 #include "lldb/Target/Process.h"
15 #include "lldb/Target/Target.h"
16 #include "lldb/Target/Thread.h"
17 #include "lldb/Utility/DataBufferHeap.h"
18 #include "lldb/Utility/DataExtractor.h"
19 #include "lldb/Utility/Endian.h"
20 #include "lldb/Utility/RegisterValue.h"
21 #include "lldb/Utility/Scalar.h"
22 #include "llvm/Support/Compiler.h"
23 
24 #include "RegisterContextPOSIX_mips64.h"
25 #include "RegisterContextFreeBSD_mips64.h"
26 #include "RegisterContextLinux_mips64.h"
27 #include "RegisterContextLinux_mips.h"
28 
29 using namespace lldb_private;
30 using namespace lldb;
31 
32 bool RegisterContextPOSIX_mips64::IsGPR(unsigned reg) {
33   return reg < m_registers_count[gpr_registers_count]; // GPR's come first.
34 }
35 
36 bool RegisterContextPOSIX_mips64::IsFPR(unsigned reg) {
37   int set = GetRegisterSetCount();
38   if (set > 1)
39     return reg < (m_registers_count[fpr_registers_count]
40                   + m_registers_count[gpr_registers_count]);
41   return false;
42 }
43 
44 RegisterContextPOSIX_mips64::RegisterContextPOSIX_mips64(
45     Thread &thread, uint32_t concrete_frame_idx,
46     RegisterInfoInterface *register_info)
47     : RegisterContext(thread, concrete_frame_idx) {
48   m_register_info_ap.reset(register_info);
49   m_num_registers = GetRegisterCount();
50   int set = GetRegisterSetCount();
51 
52   const RegisterSet *reg_set_ptr;
53   for(int i = 0; i < set; ++i) {
54       reg_set_ptr = GetRegisterSet(i);
55       m_registers_count[i] = reg_set_ptr->num_registers;
56   }
57 
58   assert(m_num_registers ==
59          static_cast<uint32_t>(m_registers_count[gpr_registers_count] +
60                                m_registers_count[fpr_registers_count] +
61                                m_registers_count[msa_registers_count]));
62 }
63 
64 RegisterContextPOSIX_mips64::~RegisterContextPOSIX_mips64() {}
65 
66 void RegisterContextPOSIX_mips64::Invalidate() {}
67 
68 void RegisterContextPOSIX_mips64::InvalidateAllRegisters() {}
69 
70 unsigned RegisterContextPOSIX_mips64::GetRegisterOffset(unsigned reg) {
71   assert(reg < m_num_registers && "Invalid register number.");
72   return GetRegisterInfo()[reg].byte_offset;
73 }
74 
75 unsigned RegisterContextPOSIX_mips64::GetRegisterSize(unsigned reg) {
76   assert(reg < m_num_registers && "Invalid register number.");
77   return GetRegisterInfo()[reg].byte_size;
78 }
79 
80 size_t RegisterContextPOSIX_mips64::GetRegisterCount() {
81   return m_register_info_ap->GetRegisterCount();
82 }
83 
84 size_t RegisterContextPOSIX_mips64::GetGPRSize() {
85   return m_register_info_ap->GetGPRSize();
86 }
87 
88 const RegisterInfo *RegisterContextPOSIX_mips64::GetRegisterInfo() {
89   // Commonly, this method is overridden and g_register_infos is copied and
90   // specialized. So, use GetRegisterInfo() rather than g_register_infos in
91   // this scope.
92   return m_register_info_ap->GetRegisterInfo();
93 }
94 
95 const RegisterInfo *
96 RegisterContextPOSIX_mips64::GetRegisterInfoAtIndex(size_t reg) {
97   if (reg < m_num_registers)
98     return &GetRegisterInfo()[reg];
99   else
100     return NULL;
101 }
102 
103 size_t RegisterContextPOSIX_mips64::GetRegisterSetCount() {
104   ArchSpec target_arch = m_register_info_ap->GetTargetArchitecture();
105   switch (target_arch.GetTriple().getOS()) {
106   case llvm::Triple::Linux: {
107     if ((target_arch.GetMachine() == llvm::Triple::mipsel) ||
108          (target_arch.GetMachine() == llvm::Triple::mips)) {
109       const auto *context = static_cast<const RegisterContextLinux_mips *>
110                                         (m_register_info_ap.get());
111       return context->GetRegisterSetCount();
112     }
113     const auto *context = static_cast<const RegisterContextLinux_mips64 *>
114                                       (m_register_info_ap.get());
115     return context->GetRegisterSetCount();
116   }
117   default: {
118     const auto *context = static_cast<const RegisterContextFreeBSD_mips64 *>
119                                       (m_register_info_ap.get());
120     return context->GetRegisterSetCount();
121   }
122 
123   }
124 }
125 
126 const RegisterSet *RegisterContextPOSIX_mips64::GetRegisterSet(size_t set) {
127   ArchSpec target_arch = m_register_info_ap->GetTargetArchitecture();
128   switch (target_arch.GetTriple().getOS()) {
129   case llvm::Triple::Linux: {
130     if ((target_arch.GetMachine() == llvm::Triple::mipsel) ||
131          (target_arch.GetMachine() == llvm::Triple::mips)) {
132       const auto *context = static_cast<const RegisterContextLinux_mips *>
133                                         (m_register_info_ap.get());
134       return context->GetRegisterSet(set);
135     }
136     const auto *context = static_cast<const RegisterContextLinux_mips64 *>
137                                       (m_register_info_ap.get());
138     return context->GetRegisterSet(set);
139   }
140   default: {
141     const auto *context = static_cast<const RegisterContextFreeBSD_mips64 *>
142                                        (m_register_info_ap.get());
143     return context->GetRegisterSet(set);
144   }
145   }
146 }
147 
148 const char *RegisterContextPOSIX_mips64::GetRegisterName(unsigned reg) {
149   assert(reg < m_num_registers && "Invalid register offset.");
150   return GetRegisterInfo()[reg].name;
151 }
152 
153 lldb::ByteOrder RegisterContextPOSIX_mips64::GetByteOrder() {
154   // Get the target process whose privileged thread was used for the register
155   // read.
156   lldb::ByteOrder byte_order = eByteOrderInvalid;
157   Process *process = CalculateProcess().get();
158 
159   if (process)
160     byte_order = process->GetByteOrder();
161   return byte_order;
162 }
163 
164 bool RegisterContextPOSIX_mips64::IsRegisterSetAvailable(size_t set_index) {
165   size_t num_sets = GetRegisterSetCount();
166 
167   return (set_index < num_sets);
168 }
169 
170 // Used when parsing DWARF and EH frame information and any other object file
171 // sections that contain register numbers in them.
172 uint32_t RegisterContextPOSIX_mips64::ConvertRegisterKindToRegisterNumber(
173     lldb::RegisterKind kind, uint32_t num) {
174   const uint32_t num_regs = m_num_registers;
175 
176   assert(kind < kNumRegisterKinds);
177   for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) {
178     const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx);
179 
180     if (reg_info->kinds[kind] == num)
181       return reg_idx;
182   }
183 
184   return LLDB_INVALID_REGNUM;
185 }
186