1 //===-- RegisterContextPOSIXCore_loongarch64.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 "RegisterContextPOSIXCore_loongarch64.h"
10
11 #include "lldb/Utility/DataBufferHeap.h"
12
13 using namespace lldb_private;
14
15 std::unique_ptr<RegisterContextCorePOSIX_loongarch64>
Create(Thread & thread,const ArchSpec & arch,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)16 RegisterContextCorePOSIX_loongarch64::Create(Thread &thread,
17 const ArchSpec &arch,
18 const DataExtractor &gpregset,
19 llvm::ArrayRef<CoreNote> notes) {
20 return std::unique_ptr<RegisterContextCorePOSIX_loongarch64>(
21 new RegisterContextCorePOSIX_loongarch64(
22 thread,
23 std::make_unique<RegisterInfoPOSIX_loongarch64>(arch, Flags()),
24 gpregset, notes));
25 }
26
RegisterContextCorePOSIX_loongarch64(Thread & thread,std::unique_ptr<RegisterInfoPOSIX_loongarch64> register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)27 RegisterContextCorePOSIX_loongarch64::RegisterContextCorePOSIX_loongarch64(
28 Thread &thread,
29 std::unique_ptr<RegisterInfoPOSIX_loongarch64> register_info,
30 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
31 : RegisterContextPOSIX_loongarch64(thread, std::move(register_info)) {
32
33 m_gpr.SetData(std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
34 gpregset.GetByteSize()));
35 m_gpr.SetByteOrder(gpregset.GetByteOrder());
36
37 ArchSpec arch = m_register_info_up->GetTargetArchitecture();
38 DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
39 m_fpr.SetData(std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
40 fpregset.GetByteSize()));
41 m_fpr.SetByteOrder(fpregset.GetByteOrder());
42 }
43
44 RegisterContextCorePOSIX_loongarch64::~RegisterContextCorePOSIX_loongarch64() =
45 default;
46
ReadGPR()47 bool RegisterContextCorePOSIX_loongarch64::ReadGPR() { return true; }
48
ReadFPR()49 bool RegisterContextCorePOSIX_loongarch64::ReadFPR() { return true; }
50
WriteGPR()51 bool RegisterContextCorePOSIX_loongarch64::WriteGPR() {
52 assert(false && "Writing registers is not allowed for core dumps");
53 return false;
54 }
55
WriteFPR()56 bool RegisterContextCorePOSIX_loongarch64::WriteFPR() {
57 assert(false && "Writing registers is not allowed for core dumps");
58 return false;
59 }
60
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)61 bool RegisterContextCorePOSIX_loongarch64::ReadRegister(
62 const RegisterInfo *reg_info, RegisterValue &value) {
63 const uint8_t *src = nullptr;
64 lldb::offset_t offset = reg_info->byte_offset;
65
66 if (IsGPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
67 src = m_gpr.GetDataStart();
68 } else if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
69 src = m_fpr.GetDataStart();
70 offset -= GetGPRSize();
71 } else {
72 return false;
73 }
74
75 Status error;
76 value.SetFromMemoryData(*reg_info, src + offset, reg_info->byte_size,
77 lldb::eByteOrderLittle, error);
78 return error.Success();
79 }
80
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)81 bool RegisterContextCorePOSIX_loongarch64::WriteRegister(
82 const RegisterInfo *reg_info, const RegisterValue &value) {
83 return false;
84 }
85