lldb/source/Plugins/ObjectFile/Placeholder/ObjectFilePlaceholder.cpp

   1 //===-- ObjectFilePlaceholder.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 "ObjectFilePlaceholder.h"
  10
  11 #include "lldb/Core/Module.h"
  12 #include "lldb/Core/ModuleSpec.h"
  13 #include "lldb/Core/PluginManager.h"
  14 #include "lldb/Core/Section.h"
  15 #include "lldb/Target/SectionLoadList.h"
  16 #include "lldb/Target/Target.h"
  17
  18 #include <memory>
  19
  20 using namespace lldb;
  21 using namespace lldb_private;
  22
  23 LLDB_PLUGIN_DEFINE(ObjectFilePlaceholder)
  24
  25 ObjectFilePlaceholder::ObjectFilePlaceholder(
  26     const lldb::ModuleSP &module_sp,
  27     const lldb_private::ModuleSpec &module_spec, lldb::addr_t base,
  28     lldb::addr_t size)
  29     : ObjectFile(module_sp, &module_spec.GetFileSpec(), /*file_offset*/ 0,
  30                  /*length*/ 0, /*data_sp*/ nullptr, /*data_offset*/ 0),
  31       m_arch(module_spec.GetArchitecture()), m_uuid(module_spec.GetUUID()),
  32       m_base(base), m_size(size) {
  33   m_symtab_up = std::make_unique<lldb_private::Symtab>(this);
  34 }
  35
  36 void ObjectFilePlaceholder::CreateSections(
  37     lldb_private::SectionList &unified_section_list) {
  38   m_sections_up = std::make_unique<lldb_private::SectionList>();
  39   auto section_sp = std::make_shared<lldb_private::Section>(
  40       GetModule(), this, /*sect_id*/ 0,
  41       lldb_private::ConstString(".module_image"), eSectionTypeOther, m_base,
  42       m_size, /*file_offset*/ 0, /*file_size*/ 0,
  43       /*log2align*/ 0, /*flags*/ 0);
  44   section_sp->SetPermissions(ePermissionsReadable | ePermissionsExecutable);
  45   m_sections_up->AddSection(section_sp);
  46   unified_section_list.AddSection(std::move(section_sp));
  47 }
  48
  49 lldb_private::Address ObjectFilePlaceholder::GetBaseAddress() {
  50   return lldb_private::Address(m_sections_up->GetSectionAtIndex(0), 0);
  51 }
  52
  53 bool ObjectFilePlaceholder::SetLoadAddress(Target &target, addr_t value,
  54                                            bool value_is_offset) {
  55   assert(!value_is_offset);
  56   assert(value == m_base);
  57
  58   // Create sections if they haven't been created already.
  59   GetModule()->GetSectionList();
  60   assert(m_sections_up->GetNumSections(0) == 1);
  61
  62   target.SetSectionLoadAddress(m_sections_up->GetSectionAtIndex(0), m_base);
  63   return true;
  64 }
  65
  66 void ObjectFilePlaceholder::Dump(lldb_private::Stream *s) {
  67   s->Format("Placeholder object file for {0} loaded at [{1:x}-{2:x})\n",
  68             GetFileSpec(), m_base, m_base + m_size);
  69 }