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
14 using namespace lldb_private;
15
RegisterContextCorePOSIX_x86_64(Thread & thread,RegisterInfoInterface * register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)16 RegisterContextCorePOSIX_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(new uint8_t[size]);
24 len =
25 gpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_gpregset.get());
26 if (len != size)
27 m_gpregset.reset();
28
29 DataExtractor fpregset = getRegset(
30 notes, register_info->GetTargetArchitecture().GetTriple(), FPR_Desc);
31 size = sizeof(FXSAVE);
32 m_fpregset.reset(new uint8_t[size]);
33 len =
34 fpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_fpregset.get());
35 if (len != size)
36 m_fpregset.reset();
37 }
38
ReadGPR()39 bool RegisterContextCorePOSIX_x86_64::ReadGPR() {
40 return m_gpregset != nullptr;
41 }
42
ReadFPR()43 bool RegisterContextCorePOSIX_x86_64::ReadFPR() {
44 return m_fpregset != nullptr;
45 }
46
WriteGPR()47 bool RegisterContextCorePOSIX_x86_64::WriteGPR() {
48 assert(0);
49 return false;
50 }
51
WriteFPR()52 bool RegisterContextCorePOSIX_x86_64::WriteFPR() {
53 assert(0);
54 return false;
55 }
56
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)57 bool 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, src + offset, reg_info->byte_size,
77 lldb::eByteOrderLittle, error);
78
79 return error.Success();
80 }
81
ReadAllRegisterValues(lldb::WritableDataBufferSP & data_sp)82 bool RegisterContextCorePOSIX_x86_64::ReadAllRegisterValues(
83 lldb::WritableDataBufferSP &data_sp) {
84 return false;
85 }
86
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)87 bool RegisterContextCorePOSIX_x86_64::WriteRegister(
88 const RegisterInfo *reg_info, const RegisterValue &value) {
89 return false;
90 }
91
WriteAllRegisterValues(const lldb::DataBufferSP & data_sp)92 bool RegisterContextCorePOSIX_x86_64::WriteAllRegisterValues(
93 const lldb::DataBufferSP &data_sp) {
94 return false;
95 }
96
HardwareSingleStep(bool enable)97 bool RegisterContextCorePOSIX_x86_64::HardwareSingleStep(bool enable) {
98 return false;
99 }
100