1//===-- RegisterContextPOSIXCore_x86_64.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_x86_64.h"
10#include "lldb/Target/Thread.h"
11#include "lldb/Utility/DataExtractor.h"
12#include "lldb/Utility/RegisterValue.h"
13
14using namespace lldb_private;
15
16RegisterContextCorePOSIX_x86_64::RegisterContextCorePOSIX_x86_64(
17 Thread &thread, RegisterInfoInterface *register_info,
18 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
19 : RegisterContextPOSIX_x86(thread, 0, register_info) {
20 size_t size, len;
21
22 size = GetGPRSize();
23 m_gpregset.reset(p: new uint8_t[size]);
24 len =
25 gpregset.ExtractBytes(offset: 0, length: size, dst_byte_order: lldb::eByteOrderLittle, dst: m_gpregset.get());
26 if (len != size)
27 m_gpregset.reset();
28
29 DataExtractor fpregset = getRegset(
30 Notes: notes, Triple: register_info->GetTargetArchitecture().GetTriple(), RegsetDescs: FPR_Desc);
31 size = sizeof(FXSAVE);
32 m_fpregset.reset(p: new uint8_t[size]);
33 len =
34 fpregset.ExtractBytes(offset: 0, length: size, dst_byte_order: lldb::eByteOrderLittle, dst: m_fpregset.get());
35 if (len != size)
36 m_fpregset.reset();
37}
38
39bool RegisterContextCorePOSIX_x86_64::ReadGPR() {
40 return m_gpregset != nullptr;
41}
42
43bool RegisterContextCorePOSIX_x86_64::ReadFPR() {
44 return m_fpregset != nullptr;
45}
46
47bool RegisterContextCorePOSIX_x86_64::WriteGPR() {
48 assert(0);
49 return false;
50}
51
52bool RegisterContextCorePOSIX_x86_64::WriteFPR() {
53 assert(0);
54 return false;
55}
56
57bool RegisterContextCorePOSIX_x86_64::ReadRegister(const RegisterInfo *reg_info,
58 RegisterValue &value) {
59 const uint8_t *src;
60 size_t offset;
61 const size_t fxsave_offset = reg_info->byte_offset - GetFXSAVEOffset();
62 // make the offset relative to the beginning of the FXSAVE structure because
63 // this is the data that we have (not the entire UserArea)
64
65 if (m_gpregset && reg_info->byte_offset < GetGPRSize()) {
66 src = m_gpregset.get();
67 offset = reg_info->byte_offset;
68 } else if (m_fpregset && fxsave_offset < sizeof(FXSAVE)) {
69 src = m_fpregset.get();
70 offset = fxsave_offset;
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
79 return error.Success();
80}
81
82bool RegisterContextCorePOSIX_x86_64::ReadAllRegisterValues(
83 lldb::WritableDataBufferSP &data_sp) {
84 return false;
85}
86
87bool RegisterContextCorePOSIX_x86_64::WriteRegister(
88 const RegisterInfo *reg_info, const RegisterValue &value) {
89 return false;
90}
91
92bool RegisterContextCorePOSIX_x86_64::WriteAllRegisterValues(
93 const lldb::DataBufferSP &data_sp) {
94 return false;
95}
96
97bool RegisterContextCorePOSIX_x86_64::HardwareSingleStep(bool enable) {
98 return false;
99}
100

source code of lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_x86_64.cpp