lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_s390x.cpp

   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() = default;
  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::WritableDataBufferSP &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 }