1 //===-- RegisterContextPOSIXCore_riscv64.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_riscv64.h"
10
11 #include "lldb/Utility/DataBufferHeap.h"
12
13 using namespace lldb_private;
14
15 std::unique_ptr<RegisterContextCorePOSIX_riscv64>
Create(Thread & thread,const ArchSpec & arch,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)16 RegisterContextCorePOSIX_riscv64::Create(Thread &thread, const ArchSpec &arch,
17 const DataExtractor &gpregset,
18 llvm::ArrayRef<CoreNote> notes) {
19 return std::unique_ptr<RegisterContextCorePOSIX_riscv64>(
20 new RegisterContextCorePOSIX_riscv64(
21 thread, std::make_unique<RegisterInfoPOSIX_riscv64>(arch, Flags()),
22 gpregset, notes));
23 }
24
RegisterContextCorePOSIX_riscv64(Thread & thread,std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)25 RegisterContextCorePOSIX_riscv64::RegisterContextCorePOSIX_riscv64(
26 Thread &thread, std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,
27 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
28 : RegisterContextPOSIX_riscv64(thread, std::move(register_info)) {
29
30 m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
31 gpregset.GetByteSize());
32 m_gpr.SetData(m_gpr_buffer);
33 m_gpr.SetByteOrder(gpregset.GetByteOrder());
34
35 ArchSpec arch = m_register_info_up->GetTargetArchitecture();
36 DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
37 m_fpr_buffer = std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
38 fpregset.GetByteSize());
39 m_fpr.SetData(m_fpr_buffer);
40 m_fpr.SetByteOrder(fpregset.GetByteOrder());
41 }
42
43 RegisterContextCorePOSIX_riscv64::~RegisterContextCorePOSIX_riscv64() = default;
44
ReadGPR()45 bool RegisterContextCorePOSIX_riscv64::ReadGPR() { return true; }
46
ReadFPR()47 bool RegisterContextCorePOSIX_riscv64::ReadFPR() { return true; }
48
WriteGPR()49 bool RegisterContextCorePOSIX_riscv64::WriteGPR() {
50 assert(false && "Writing registers is not allowed for core dumps");
51 return false;
52 }
53
WriteFPR()54 bool RegisterContextCorePOSIX_riscv64::WriteFPR() {
55 assert(false && "Writing registers is not allowed for core dumps");
56 return false;
57 }
58
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)59 bool RegisterContextCorePOSIX_riscv64::ReadRegister(
60 const RegisterInfo *reg_info, RegisterValue &value) {
61 const uint8_t *src = nullptr;
62 lldb::offset_t offset = reg_info->byte_offset;
63
64 if (IsGPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
65 src = m_gpr.GetDataStart();
66 } else if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
67 src = m_fpr.GetDataStart();
68 offset -= GetGPRSize();
69 } else {
70 return false;
71 }
72
73 Status error;
74 value.SetFromMemoryData(*reg_info, src + offset, reg_info->byte_size,
75 lldb::eByteOrderLittle, error);
76 return error.Success();
77 }
78
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)79 bool RegisterContextCorePOSIX_riscv64::WriteRegister(
80 const RegisterInfo *reg_info, const RegisterValue &value) {
81 return false;
82 }
83