diff options
Diffstat (limited to 'lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp')
| -rw-r--r-- | lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp | 156 |
1 files changed, 148 insertions, 8 deletions
diff --git a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp index de889ee97f0..67773e7b2c8 100644 --- a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp +++ b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp @@ -26,6 +26,7 @@ #include "lldb/Host/FileSpec.h" #include "lldb/Symbol/ClangNamespaceDecl.h" #include "lldb/Symbol/ObjectFile.h" +#include "lldb/Target/Process.h" using namespace lldb; @@ -39,7 +40,8 @@ ObjectFileMachO::Initialize() { PluginManager::RegisterPlugin (GetPluginNameStatic(), GetPluginDescriptionStatic(), - CreateInstance); + CreateInstance, + CreateMemoryInstance); } void @@ -74,6 +76,58 @@ ObjectFileMachO::CreateInstance (Module* module, DataBufferSP& data_sp, const Fi return NULL; } +ObjectFile * +ObjectFileMachO::CreateMemoryInstance (Module* module, + DataBufferSP& data_sp, + const ProcessSP &process_sp, + lldb::addr_t header_addr) +{ + if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) + { + std::auto_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module, data_sp, process_sp, header_addr)); + if (objfile_ap.get() && objfile_ap->ParseHeader()) + return objfile_ap.release(); + } + return NULL; +} + + +const ConstString & +ObjectFileMachO::GetSegmentNameTEXT() +{ + static ConstString g_segment_name_TEXT ("__TEXT"); + return g_segment_name_TEXT; +} + +const ConstString & +ObjectFileMachO::GetSegmentNameDATA() +{ + static ConstString g_segment_name_DATA ("__DATA"); + return g_segment_name_DATA; +} + +const ConstString & +ObjectFileMachO::GetSegmentNameOBJC() +{ + static ConstString g_segment_name_OBJC ("__OBJC"); + return g_segment_name_OBJC; +} + +const ConstString & +ObjectFileMachO::GetSegmentNameLINKEDIT() +{ + static ConstString g_section_name_LINKEDIT ("__LINKEDIT"); + return g_section_name_LINKEDIT; +} + +const ConstString & +ObjectFileMachO::GetSectionNameEHFrame() +{ + static ConstString g_section_name_eh_frame ("__eh_frame"); + return g_section_name_eh_frame; +} + + static uint32_t MachHeaderSizeFromMagic(uint32_t magic) @@ -121,6 +175,20 @@ ObjectFileMachO::ObjectFileMachO(Module* module, DataBufferSP& data_sp, const Fi ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); } +ObjectFileMachO::ObjectFileMachO (lldb_private::Module* module, + lldb::DataBufferSP& header_data_sp, + const lldb::ProcessSP &process_sp, + lldb::addr_t header_addr) : + ObjectFile(module, process_sp, header_addr, header_data_sp), + m_mutex (Mutex::eMutexTypeRecursive), + m_header(), + m_sections_ap(), + m_symtab_ap(), + m_entry_point_address () +{ + ::memset (&m_header, 0, sizeof(m_header)); + ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); +} ObjectFileMachO::~ObjectFileMachO() { @@ -173,7 +241,28 @@ ObjectFileMachO::ParseHeader () ArchSpec mach_arch(eArchTypeMachO, m_header.cputype, m_header.cpusubtype); if (SetModulesArchitecture (mach_arch)) - return true; + { + const size_t header_and_lc_size = m_header.sizeofcmds + MachHeaderSizeFromMagic(m_header.magic); + if (m_data.GetByteSize() < header_and_lc_size) + { + DataBufferSP data_sp; + ProcessSP process_sp (m_process_wp.lock()); + if (process_sp) + { + data_sp = ReadMemory (process_sp, m_offset, header_and_lc_size); + } + else + { + // Read in all only the load command data from the file on disk + data_sp = m_file.ReadFileContents(m_offset, header_and_lc_size); + if (data_sp->GetByteSize() != header_and_lc_size) + return false; + } + if (data_sp) + m_data.SetData (data_sp); + } + } + return true; } else { @@ -799,11 +888,45 @@ ObjectFileMachO::ParseSymtab (bool minimize) if (section_list == NULL) return 0; + ProcessSP process_sp (m_process_wp.lock()); + const size_t addr_byte_size = m_data.GetAddressByteSize(); bool bit_width_32 = addr_byte_size == 4; const size_t nlist_byte_size = bit_width_32 ? sizeof(struct nlist) : sizeof(struct nlist_64); - DataExtractor nlist_data (m_data, symtab_load_command.symoff, symtab_load_command.nsyms * nlist_byte_size); + DataExtractor nlist_data (NULL, 0, m_data.GetByteOrder(), m_data.GetAddressByteSize()); + DataExtractor strtab_data (NULL, 0, m_data.GetByteOrder(), m_data.GetAddressByteSize()); + + const addr_t nlist_data_byte_size = symtab_load_command.nsyms * nlist_byte_size; + const addr_t strtab_data_byte_size = symtab_load_command.strsize; + if (process_sp) + { + Target &target = process_sp->GetTarget(); + SectionSP linkedit_section_sp(section_list->FindSectionByName(GetSegmentNameLINKEDIT())); + // Reading mach file from memory in a process or core file... + + if (linkedit_section_sp) + { + const addr_t linkedit_load_addr = linkedit_section_sp->GetLoadBaseAddress(&target); + const addr_t linkedit_file_offset = linkedit_section_sp->GetFileOffset(); + const addr_t symoff_addr = linkedit_load_addr + symtab_load_command.symoff - linkedit_file_offset; + const addr_t stroff_addr = linkedit_load_addr + symtab_load_command.stroff - linkedit_file_offset; + DataBufferSP nlist_data_sp (ReadMemory (process_sp, symoff_addr, nlist_data_byte_size)); + DataBufferSP strtab_data_sp (ReadMemory (process_sp, stroff_addr, strtab_data_byte_size)); + nlist_data.SetData (nlist_data_sp, 0, nlist_data_sp->GetByteSize()); + strtab_data.SetData (strtab_data_sp, 0, strtab_data_sp->GetByteSize()); + } + } + else + { + nlist_data.SetData (m_data, + symtab_load_command.symoff, + nlist_data_byte_size); + strtab_data.SetData (m_data, + symtab_load_command.stroff, + strtab_data_byte_size); + + } if (nlist_data.GetByteSize() == 0) { @@ -812,7 +935,6 @@ ObjectFileMachO::ParseSymtab (bool minimize) return 0; } - DataExtractor strtab_data (m_data, symtab_load_command.stroff, symtab_load_command.strsize); if (strtab_data.GetByteSize() == 0) { @@ -821,10 +943,10 @@ ObjectFileMachO::ParseSymtab (bool minimize) return 0; } - static ConstString g_segment_name_TEXT ("__TEXT"); - static ConstString g_segment_name_DATA ("__DATA"); - static ConstString g_segment_name_OBJC ("__OBJC"); - static ConstString g_section_name_eh_frame ("__eh_frame"); + const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT(); + const ConstString &g_segment_name_DATA = GetSegmentNameDATA(); + const ConstString &g_segment_name_OBJC = GetSegmentNameOBJC(); + const ConstString &g_section_name_eh_frame = GetSectionNameEHFrame(); SectionSP text_section_sp(section_list->FindSectionByName(g_segment_name_TEXT)); SectionSP data_section_sp(section_list->FindSectionByName(g_segment_name_DATA)); SectionSP objc_section_sp(section_list->FindSectionByName(g_segment_name_OBJC)); @@ -1823,6 +1945,24 @@ ObjectFileMachO::GetEntryPointAddress () } +lldb_private::Address +ObjectFileMachO::GetHeaderAddress () +{ + lldb_private::Address header_addr; + SectionList *section_list = GetSectionList(); + if (section_list) + { + SectionSP text_segment_sp (section_list->FindSectionByName (GetSegmentNameTEXT())); + if (text_segment_sp) + { + header_addr.SetSection (text_segment_sp.get()); + header_addr.SetOffset (0); + } + } + return header_addr; +} + + ObjectFile::Type ObjectFileMachO::CalculateType() { |
