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
17using namespace lldb_private;
18
19RegisterContextCorePOSIX_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
36RegisterContextCorePOSIX_s390x::~RegisterContextCorePOSIX_s390x() = default;
37
38bool RegisterContextCorePOSIX_s390x::ReadGPR() { return true; }
39
40bool RegisterContextCorePOSIX_s390x::ReadFPR() { return true; }
41
42bool RegisterContextCorePOSIX_s390x::WriteGPR() {
43  assert(0);
44  return false;
45}
46
47bool RegisterContextCorePOSIX_s390x::WriteFPR() {
48  assert(0);
49  return false;
50}
51
52bool 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
79bool RegisterContextCorePOSIX_s390x::ReadAllRegisterValues(
80    lldb::WritableDataBufferSP &data_sp) {
81  return false;
82}
83
84bool RegisterContextCorePOSIX_s390x::WriteRegister(const RegisterInfo *reg_info,
85                                                   const RegisterValue &value) {
86  return false;
87}
88
89bool RegisterContextCorePOSIX_s390x::WriteAllRegisterValues(
90    const lldb::DataBufferSP &data_sp) {
91  return false;
92}
93
94bool RegisterContextCorePOSIX_s390x::HardwareSingleStep(bool enable) {
95  return false;
96}
97