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 Flags opt_regsets = RegisterInfoPOSIX_riscv64::eRegsetMaskDefault;
20
21 DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
22 if (fpregset.GetByteSize() >= sizeof(uint64_t)) {
23 opt_regsets.Set(RegisterInfoPOSIX_riscv64::eRegsetMaskFP);
24 }
25
26 return std::unique_ptr<RegisterContextCorePOSIX_riscv64>(
27 new RegisterContextCorePOSIX_riscv64(
28 thread,
29 std::make_unique<RegisterInfoPOSIX_riscv64>(arch, opt_regsets),
30 gpregset, notes));
31 }
32
RegisterContextCorePOSIX_riscv64(Thread & thread,std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)33 RegisterContextCorePOSIX_riscv64::RegisterContextCorePOSIX_riscv64(
34 Thread &thread, std::unique_ptr<RegisterInfoPOSIX_riscv64> register_info,
35 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
36 : RegisterContextPOSIX_riscv64(thread, std::move(register_info)) {
37
38 m_gpr.SetData(std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
39 gpregset.GetByteSize()));
40 m_gpr.SetByteOrder(gpregset.GetByteOrder());
41
42 if (m_register_info_up->IsFPPresent()) {
43 ArchSpec arch = m_register_info_up->GetTargetArchitecture();
44 m_fpr = getRegset(notes, arch.GetTriple(), FPR_Desc);
45 }
46 }
47
48 RegisterContextCorePOSIX_riscv64::~RegisterContextCorePOSIX_riscv64() = default;
49
ReadGPR()50 bool RegisterContextCorePOSIX_riscv64::ReadGPR() { return true; }
51
ReadFPR()52 bool RegisterContextCorePOSIX_riscv64::ReadFPR() { return true; }
53
WriteGPR()54 bool RegisterContextCorePOSIX_riscv64::WriteGPR() {
55 assert(false && "Writing registers is not allowed for core dumps");
56 return false;
57 }
58
WriteFPR()59 bool RegisterContextCorePOSIX_riscv64::WriteFPR() {
60 assert(false && "Writing registers is not allowed for core dumps");
61 return false;
62 }
63
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)64 bool RegisterContextCorePOSIX_riscv64::ReadRegister(
65 const RegisterInfo *reg_info, RegisterValue &value) {
66 const uint8_t *src = nullptr;
67 lldb::offset_t offset = reg_info->byte_offset;
68
69 if (IsGPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
70 src = m_gpr.GetDataStart();
71 } else if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
72 src = m_fpr.GetDataStart();
73 offset -= GetGPRSize();
74 } else {
75 return false;
76 }
77
78 Status error;
79 value.SetFromMemoryData(*reg_info, src + offset, reg_info->byte_size,
80 lldb::eByteOrderLittle, error);
81 return error.Success();
82 }
83
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)84 bool RegisterContextCorePOSIX_riscv64::WriteRegister(
85 const RegisterInfo *reg_info, const RegisterValue &value) {
86 return false;
87 }
88