1 //===-- RegisterContextPOSIXCore_riscv32.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_riscv32.h"
10 #include "lldb/Utility/DataBufferHeap.h"
11
12 using namespace lldb_private;
13
14 std::unique_ptr<RegisterContextCorePOSIX_riscv32>
Create(Thread & thread,const ArchSpec & arch,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)15 RegisterContextCorePOSIX_riscv32::Create(Thread &thread, const ArchSpec &arch,
16 const DataExtractor &gpregset,
17 llvm::ArrayRef<CoreNote> notes) {
18 Flags opt_regsets = RegisterInfoPOSIX_riscv32::eRegsetMaskDefault;
19
20 return std::unique_ptr<RegisterContextCorePOSIX_riscv32>(
21 new RegisterContextCorePOSIX_riscv32(
22 thread,
23 std::make_unique<RegisterInfoPOSIX_riscv32>(arch, opt_regsets),
24 gpregset, notes));
25 }
26
RegisterContextCorePOSIX_riscv32(Thread & thread,std::unique_ptr<RegisterInfoPOSIX_riscv32> register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)27 RegisterContextCorePOSIX_riscv32::RegisterContextCorePOSIX_riscv32(
28 Thread &thread, std::unique_ptr<RegisterInfoPOSIX_riscv32> register_info,
29 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
30 : RegisterContextPOSIX_riscv32(thread, std::move(register_info)) {
31
32 m_gpr.SetData(std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
33 gpregset.GetByteSize()));
34 m_gpr.SetByteOrder(gpregset.GetByteOrder());
35
36 if (m_register_info_up->IsFPPresent()) {
37 ArchSpec arch = m_register_info_up->GetTargetArchitecture();
38 m_fpr = getRegset(notes, arch.GetTriple(), FPR_Desc);
39 }
40 }
41
42 RegisterContextCorePOSIX_riscv32::~RegisterContextCorePOSIX_riscv32() = default;
43
ReadGPR()44 bool RegisterContextCorePOSIX_riscv32::ReadGPR() { return true; }
45
ReadFPR()46 bool RegisterContextCorePOSIX_riscv32::ReadFPR() { return true; }
47
WriteGPR()48 bool RegisterContextCorePOSIX_riscv32::WriteGPR() {
49 assert(false && "Writing registers is not allowed for core dumps");
50 return false;
51 }
52
WriteFPR()53 bool RegisterContextCorePOSIX_riscv32::WriteFPR() {
54 assert(false && "Writing registers is not allowed for core dumps");
55 return false;
56 }
57
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)58 bool RegisterContextCorePOSIX_riscv32::ReadRegister(
59 const RegisterInfo *reg_info, RegisterValue &value) {
60 const uint8_t *src = nullptr;
61 lldb::offset_t offset = reg_info->byte_offset;
62
63 if (IsGPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
64 src = m_gpr.GetDataStart();
65 } else if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
66 src = m_fpr.GetDataStart();
67 offset -= GetGPRSize();
68 } else {
69 return false;
70 }
71
72 Status error;
73 value.SetFromMemoryData(*reg_info, src + offset, reg_info->byte_size,
74 lldb::eByteOrderLittle, error);
75 return error.Success();
76 }
77
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)78 bool RegisterContextCorePOSIX_riscv32::WriteRegister(
79 const RegisterInfo *reg_info, const RegisterValue &value) {
80 return false;
81 }
82