Function CFGDataAnalysis

src/e9tool/e9cfg.cpp:330–359

* Data analysis pass: find potential code pointers in data. */

 * Data analysis pass: find potential code pointers in data.
 */
static void CFGDataAnalysis(const ELF *elf, bool pic, const Instr *Is,
    size_t size, const std::set<intptr_t> &tables, Targets &targets)
{
    // Gather relocation information:
    const SectionInfo &sections = getELFSectionInfo(elf);
    for (const auto &entry: sections)
    {
        const Elf64_Shdr *shdr = entry.second;
        if (shdr->sh_type != SHT_RELA)
            continue;
        const uint8_t *sh_data = getELFData(elf) + shdr->sh_offset;
        size_t sh_size = shdr->sh_size;
        const Elf64_Rela *rela = (const Elf64_Rela *)sh_data;
        const Elf64_Rela *rela_end = rela + sh_size / sizeof(Elf64_Rela);
        for (; rela < rela_end; rela++)
        {
            if (ELF64_R_TYPE(rela->r_info) == R_X86_64_RELATIVE)
            {
                intptr_t target = (intptr_t)rela->r_addend;
                DEBUG(targets, target, "Reloc : %p (F)", (void *)target);
                addTarget(target, TARGET_INDIRECT | TARGET_FUNCTION, targets);
            }
        }
    }

    // Analyze each data section:
    for (const auto &entry: sections)
        CFGSectionAnalysis(elf, pic, entry.first, entry.second, Is, size,
            tables, targets);
}

/*
 * Build the set of potential jump targets.