Method Write

external/celf/Src/CElf.cpp:893–1133

}

bool
CElf::Write(vector<char>& vBinary)
{
    //
    // General method:
    // 0. Check the number of sections.
    // 1. Make new string tables.
    // 2. Refresh the file format data structures.
    //    This will involve updating:
    //    a. Symbol table section numbers.
    //    b. Section link/info fields where those are section numbers.
    //    c. File offsets of section data.
    // 3. Write the section headers.
    // 4. Write the section data.
    // 5. Write the file header.
    //

    // Make sure there's no dreck in the vector.
    vBinary.resize(0);

    if (GetNumSections() >= SHN_LORESERVE)
    {
        // The SHN_XINDEX case is not yet implemented, not yet debugged.
        return false;
    }

    // Empty section header string table.
    m_SectionHeaderStringTable->EraseData();

    // Make a map from CElfSection* to index.
    map<CElfSection*, size_t> SectionMap;
    {
        size_t i = 0;

        for (SectionIterator it = SectionsBegin(); it != SectionsEnd(); i++, ++it)
        {
            SectionMap[*it] = i;
        }
    }

    // for each section
    //   1. add its name to the section header string table.
    //   2. update link/info fields
    for (SectionIterator it = SectionsBegin(); it != SectionsEnd(); ++it)
    {
        // If we add support for SHN_XINDEX, more code will be needed here.
        // Values above SHN_LORESERVE will set SHN_XINDEX.
        // Other code will need to set up the associated SHT_SYMTAB_SHNDX section.
        size_t name = m_SectionHeaderStringTable->AddString((*it)->GetName());
        (*it)->m_Header.sh_name = static_cast<Elf32_Word>(name);

        if ((*it)->GetLinkSection())
        {
            size_t link = SectionMap.find((*it)->GetLinkSection())->second;
            (*it)->SetLink(static_cast<Elf64_Word>(link));
        }

        if ((*it)->GetInfoSection())