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
13using namespace lldb_private;
14
15std::unique_ptr<RegisterContextCorePOSIX_loongarch64>
16RegisterContextCorePOSIX_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>(args: arch, args: Flags()),
24 gpregset, notes));
25}
26
27RegisterContextCorePOSIX_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(data_sp: std::make_shared<DataBufferHeap>(args: gpregset.GetDataStart(),
34 args: gpregset.GetByteSize()));
35 m_gpr.SetByteOrder(gpregset.GetByteOrder());
36
37 ArchSpec arch = m_register_info_up->GetTargetArchitecture();
38 DataExtractor fpregset = getRegset(Notes: notes, Triple: arch.GetTriple(), RegsetDescs: FPR_Desc);
39 m_fpr.SetData(data_sp: std::make_shared<DataBufferHeap>(args: fpregset.GetDataStart(),
40 args: fpregset.GetByteSize()));
41 m_fpr.SetByteOrder(fpregset.GetByteOrder());
42}
43
44RegisterContextCorePOSIX_loongarch64::~RegisterContextCorePOSIX_loongarch64() =
45 default;
46
47bool RegisterContextCorePOSIX_loongarch64::ReadGPR() { return true; }
48
49bool RegisterContextCorePOSIX_loongarch64::ReadFPR() { return true; }
50
51bool RegisterContextCorePOSIX_loongarch64::WriteGPR() {
52 assert(false && "Writing registers is not allowed for core dumps");
53 return false;
54}
55
56bool RegisterContextCorePOSIX_loongarch64::WriteFPR() {
57 assert(false && "Writing registers is not allowed for core dumps");
58 return false;
59}
60
61bool 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: reg_info->kinds[lldb::eRegisterKindLLDB])) {
67 src = m_gpr.GetDataStart();
68 } else if (IsFPR(reg: 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: *reg_info, src: src + offset, src_len: reg_info->byte_size,
77 src_byte_order: lldb::eByteOrderLittle, error);
78 return error.Success();
79}
80
81bool RegisterContextCorePOSIX_loongarch64::WriteRegister(
82 const RegisterInfo *reg_info, const RegisterValue &value) {
83 return false;
84}
85

source code of lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_loongarch64.cpp