1 //===-- RegisterContextPOSIXCore_x86_64.cpp ---------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "RegisterContextPOSIXCore_x86_64.h"
11 #include "lldb/Target/Thread.h"
12 #include "lldb/Utility/DataExtractor.h"
13 #include "lldb/Utility/RegisterValue.h"
14
15 using namespace lldb_private;
16
RegisterContextCorePOSIX_x86_64(Thread & thread,RegisterInfoInterface * register_info,const DataExtractor & gpregset,llvm::ArrayRef<CoreNote> notes)17 RegisterContextCorePOSIX_x86_64::RegisterContextCorePOSIX_x86_64(
18 Thread &thread, RegisterInfoInterface *register_info,
19 const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
20 : RegisterContextPOSIX_x86(thread, 0, register_info) {
21 size_t size, len;
22
23 size = GetGPRSize();
24 m_gpregset.reset(new uint8_t[size]);
25 len =
26 gpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_gpregset.get());
27 if (len != size)
28 m_gpregset.reset();
29
30 DataExtractor fpregset = getRegset(
31 notes, register_info->GetTargetArchitecture().GetTriple(), FPR_Desc);
32 size = sizeof(FXSAVE);
33 m_fpregset.reset(new uint8_t[size]);
34 len =
35 fpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_fpregset.get());
36 if (len != size)
37 m_fpregset.reset();
38 }
39
ReadGPR()40 bool RegisterContextCorePOSIX_x86_64::ReadGPR() {
41 return m_gpregset != nullptr;
42 }
43
ReadFPR()44 bool RegisterContextCorePOSIX_x86_64::ReadFPR() {
45 return m_fpregset != nullptr;
46 }
47
WriteGPR()48 bool RegisterContextCorePOSIX_x86_64::WriteGPR() {
49 assert(0);
50 return false;
51 }
52
WriteFPR()53 bool RegisterContextCorePOSIX_x86_64::WriteFPR() {
54 assert(0);
55 return false;
56 }
57
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)58 bool RegisterContextCorePOSIX_x86_64::ReadRegister(const RegisterInfo *reg_info,
59 RegisterValue &value) {
60 const uint8_t *src;
61 size_t offset;
62 const size_t fxsave_offset = reg_info->byte_offset - GetFXSAVEOffset();
63 // make the offset relative to the beginning of the FXSAVE structure because
64 // this is the data that we have (not the entire UserArea)
65
66 if (m_gpregset && reg_info->byte_offset < GetGPRSize()) {
67 src = m_gpregset.get();
68 offset = reg_info->byte_offset;
69 } else if (m_fpregset && fxsave_offset < sizeof(FXSAVE)) {
70 src = m_fpregset.get();
71 offset = fxsave_offset;
72 } else {
73 return false;
74 }
75
76 Status error;
77 value.SetFromMemoryData(reg_info, src + offset, reg_info->byte_size,
78 lldb::eByteOrderLittle, error);
79
80 return error.Success();
81 }
82
ReadAllRegisterValues(lldb::DataBufferSP & data_sp)83 bool RegisterContextCorePOSIX_x86_64::ReadAllRegisterValues(
84 lldb::DataBufferSP &data_sp) {
85 return false;
86 }
87
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)88 bool RegisterContextCorePOSIX_x86_64::WriteRegister(
89 const RegisterInfo *reg_info, const RegisterValue &value) {
90 return false;
91 }
92
WriteAllRegisterValues(const lldb::DataBufferSP & data_sp)93 bool RegisterContextCorePOSIX_x86_64::WriteAllRegisterValues(
94 const lldb::DataBufferSP &data_sp) {
95 return false;
96 }
97
HardwareSingleStep(bool enable)98 bool RegisterContextCorePOSIX_x86_64::HardwareSingleStep(bool enable) {
99 return false;
100 }
101