1 //===-- RegisterContextPOSIXCore_s390x.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_s390x.h"
10 
11 #include "lldb/Target/Thread.h"
12 #include "lldb/Utility/DataBufferHeap.h"
13 #include "lldb/Utility/RegisterValue.h"
14 
15 #include <memory>
16 
17 using namespace lldb_private;
18 
19 RegisterContextCorePOSIX_s390x::RegisterContextCorePOSIX_s390x(
20     Thread &thread, RegisterInfoInterface *register_info,
21     const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
22     : RegisterContextPOSIX_s390x(thread, 0, register_info) {
23   m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
24                                                   gpregset.GetByteSize());
25   m_gpr.SetData(m_gpr_buffer);
26   m_gpr.SetByteOrder(gpregset.GetByteOrder());
27 
28   DataExtractor fpregset = getRegset(
29       notes, register_info->GetTargetArchitecture().GetTriple(), FPR_Desc);
30   m_fpr_buffer = std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
31                                                   fpregset.GetByteSize());
32   m_fpr.SetData(m_fpr_buffer);
33   m_fpr.SetByteOrder(fpregset.GetByteOrder());
34 }
35 
36 RegisterContextCorePOSIX_s390x::~RegisterContextCorePOSIX_s390x() {}
37 
38 bool RegisterContextCorePOSIX_s390x::ReadGPR() { return true; }
39 
40 bool RegisterContextCorePOSIX_s390x::ReadFPR() { return true; }
41 
42 bool RegisterContextCorePOSIX_s390x::WriteGPR() {
43   assert(0);
44   return false;
45 }
46 
47 bool RegisterContextCorePOSIX_s390x::WriteFPR() {
48   assert(0);
49   return false;
50 }
51 
52 bool RegisterContextCorePOSIX_s390x::ReadRegister(const RegisterInfo *reg_info,
53                                                   RegisterValue &value) {
54   const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
55   if (reg == LLDB_INVALID_REGNUM)
56     return false;
57 
58   if (IsGPR(reg)) {
59     lldb::offset_t offset = reg_info->byte_offset;
60     uint64_t v = m_gpr.GetMaxU64(&offset, reg_info->byte_size);
61     if (offset == reg_info->byte_offset + reg_info->byte_size) {
62       value.SetUInt(v, reg_info->byte_size);
63       return true;
64     }
65   }
66 
67   if (IsFPR(reg)) {
68     lldb::offset_t offset = reg_info->byte_offset;
69     uint64_t v = m_fpr.GetMaxU64(&offset, reg_info->byte_size);
70     if (offset == reg_info->byte_offset + reg_info->byte_size) {
71       value.SetUInt(v, reg_info->byte_size);
72       return true;
73     }
74   }
75 
76   return false;
77 }
78 
79 bool RegisterContextCorePOSIX_s390x::ReadAllRegisterValues(
80     lldb::DataBufferSP &data_sp) {
81   return false;
82 }
83 
84 bool RegisterContextCorePOSIX_s390x::WriteRegister(const RegisterInfo *reg_info,
85                                                    const RegisterValue &value) {
86   return false;
87 }
88 
89 bool RegisterContextCorePOSIX_s390x::WriteAllRegisterValues(
90     const lldb::DataBufferSP &data_sp) {
91   return false;
92 }
93 
94 bool RegisterContextCorePOSIX_s390x::HardwareSingleStep(bool enable) {
95   return false;
96 }
97