RegisterContextPOSIXCore_powerpc.cpp

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//===-- RegisterContextPOSIXCore_powerpc.cpp ------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "RegisterContextPOSIXCore_powerpc.h"
 
#include "lldb/Target/Thread.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/RegisterValue.h"
 
#include <memory>
 
using namespace lldb_private;
 
RegisterContextCorePOSIX_powerpc::RegisterContextCorePOSIX_powerpc(
    Thread &thread, RegisterInfoInterface *register_info,
    const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
    : RegisterContextPOSIX_powerpc(thread, 0, register_info) {
  m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
                                                  gpregset.GetByteSize());
  m_gpr.SetData(m_gpr_buffer);
  m_gpr.SetByteOrder(gpregset.GetByteOrder());
 
  ArchSpec arch = register_info->GetTargetArchitecture();
  DataExtractor fpregset = getRegset(notes, arch.GetTriple(), FPR_Desc);
  m_fpr_buffer = std::make_shared<DataBufferHeap>(fpregset.GetDataStart(),
                                                  fpregset.GetByteSize());
  m_fpr.SetData(m_fpr_buffer);
  m_fpr.SetByteOrder(fpregset.GetByteOrder());
 
  DataExtractor vregset = getRegset(notes, arch.GetTriple(), PPC_VMX_Desc);
  m_vec_buffer = std::make_shared<DataBufferHeap>(vregset.GetDataStart(),
                                                  vregset.GetByteSize());
  m_vec.SetData(m_vec_buffer);
  m_vec.SetByteOrder(vregset.GetByteOrder());
}
 
RegisterContextCorePOSIX_powerpc::~RegisterContextCorePOSIX_powerpc() = default;
 
bool RegisterContextCorePOSIX_powerpc::ReadGPR() { return true; }
 
bool RegisterContextCorePOSIX_powerpc::ReadFPR() { return true; }
 
bool RegisterContextCorePOSIX_powerpc::ReadVMX() { return true; }
 
bool RegisterContextCorePOSIX_powerpc::WriteGPR() {
  assert(0);
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::WriteFPR() {
  assert(0);
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::WriteVMX() {
  assert(0);
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::ReadRegister(
    const RegisterInfo *reg_info, RegisterValue &value) {
  lldb::offset_t offset = reg_info->byte_offset;
  if (IsFPR(reg_info->kinds[lldb::eRegisterKindLLDB])) {
    uint64_t v = m_fpr.GetMaxU64(&offset, reg_info->byte_size);
    if (offset == reg_info->byte_offset + reg_info->byte_size) {
      value = v;
      return true;
    }
  } else if (IsVMX(reg_info->kinds[lldb::eRegisterKindLLDB])) {
    uint32_t v[4];
    offset = m_vec.CopyData(offset, reg_info->byte_size, &v);
    if (offset == reg_info->byte_size) {
      value.SetBytes(v, reg_info->byte_size, m_vec.GetByteOrder());
      return true;
    }
  } else {
    uint64_t v = m_gpr.GetMaxU64(&offset, reg_info->byte_size);
    if (offset == reg_info->byte_offset + reg_info->byte_size) {
      if (reg_info->byte_size < sizeof(v))
        value = (uint32_t)v;
      else
        value = v;
      return true;
    }
  }
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::ReadAllRegisterValues(
    lldb::WritableDataBufferSP &data_sp) {
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::WriteRegister(
    const RegisterInfo *reg_info, const RegisterValue &value) {
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::WriteAllRegisterValues(
    const lldb::DataBufferSP &data_sp) {
  return false;
}
 
bool RegisterContextCorePOSIX_powerpc::HardwareSingleStep(bool enable) {
  return false;
}