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readelf: Add support for core notes and relocations
This commit is contained in:
Brendan Coles
Andreas Kling
parent
304e193836
commit
6bc01909b7
Notes:
sideshowbarker
2024-07-18 21:22:20 +09:00
Author: https://github.com/bcoles Commit: https://github.com/SerenityOS/serenity/commit/6bc01909b74 Pull-request: https://github.com/SerenityOS/serenity/pull/5777
1 changed files with 142 additions and 12 deletions
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@ -237,6 +237,36 @@ static const char* object_symbol_binding_to_string(Elf32_Word type)
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}
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}
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static const char* object_relocation_type_to_string(Elf32_Word type)
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{
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switch (type) {
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case R_386_NONE:
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return "R_386_NONE";
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case R_386_32:
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return "R_386_32";
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case R_386_PC32:
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return "R_386_PC32";
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case R_386_GOT32:
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return "R_386_GOT32";
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case R_386_PLT32:
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return "R_386_PLT32";
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case R_386_COPY:
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return "R_386_COPY";
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case R_386_GLOB_DAT:
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return "R_386_GLOB_DAT";
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case R_386_JMP_SLOT:
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return "R_386_JMP_SLOT";
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case R_386_RELATIVE:
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return "R_386_RELATIVE";
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case R_386_TLS_TPOFF:
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return "R_386_TLS_TPOFF";
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case R_386_TLS_TPOFF32:
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return "R_386_TLS_TPOFF32";
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default:
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return "(?)";
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}
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}
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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@ -262,8 +292,12 @@ int main(int argc, char** argv)
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args_parser.add_option(display_elf_header, "Display ELF header", "file-header", 'h');
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args_parser.add_option(display_program_headers, "Display program headers", "program-headers", 'l');
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args_parser.add_option(display_section_headers, "Display section headers", "section-headers", 'S');
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args_parser.add_option(display_headers, "Equivalent to: -h -l -S", "headers", 'e');
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args_parser.add_option(display_headers, "Equivalent to: -h -l -S -s -r -d -n -u", "headers", 'e');
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args_parser.add_option(display_symbol_table, "Display the symbol table", "syms", 's');
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args_parser.add_option(display_dynamic_section, "Display the dynamic section", "dynamic", 'd');
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args_parser.add_option(display_core_notes, "Display core notes", "notes", 'n');
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args_parser.add_option(display_relocations, "Display relocations", "relocs", 'r');
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args_parser.add_option(display_unwind_info, "Display unwind info", "unwind", 'u');
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args_parser.add_positional_argument(path, "ELF path", "path");
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args_parser.parse(argc, argv);
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@ -282,6 +316,9 @@ int main(int argc, char** argv)
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display_elf_header = true;
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display_program_headers = true;
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display_section_headers = true;
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display_core_notes = true;
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display_relocations = true;
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display_unwind_info = true;
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display_symbol_table = true;
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}
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@ -363,7 +400,7 @@ int main(int argc, char** argv)
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printf(" Name Type Address Offset Size Flags\n");
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interpreter_image.for_each_section([](const ELF::Image::Section& section) {
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printf(" %-15s ", section.name().characters_without_null_termination());
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printf(" %-15s ", StringView(section.name()).to_string().characters());
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printf("%-15s ", object_section_header_type_to_string(section.type()));
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printf("%08x ", section.address());
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printf("%08x ", section.offset());
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@ -403,36 +440,129 @@ int main(int argc, char** argv)
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return IterationDecision::Continue;
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});
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// TODO: Display section to segment mapping
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printf("\n");
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}
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if (display_dynamic_section) {
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// TODO: Dynamic section
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auto found_dynamic_section = false;
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interpreter_image.for_each_section([&found_dynamic_section](const ELF::Image::Section& section) {
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if (section.name() != ELF_DYNAMIC)
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return IterationDecision::Continue;
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found_dynamic_section = true;
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if (!section.entry_count()) {
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printf("Dynamic section '%s' at offset 0x%08x contains zero entries.\n", section.name().to_string().characters(), section.offset());
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return IterationDecision::Continue;
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}
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printf("Dynamic section '%s' at offset 0x%08x contains %u entries.\n", section.name().to_string().characters(), section.offset(), section.entry_count());
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// TODO: Display dynamic section
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return IterationDecision::Continue;
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});
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if (!found_dynamic_section)
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printf("No dynamic section in this file.\n");
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printf("\n");
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}
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if (display_relocations) {
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// TODO: Relocations section
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auto found_relocations = false;
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interpreter_image.for_each_section([&found_relocations](const ELF::Image::Section& section) {
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// FIXME: support dynamic relocations (.rel.dyn)
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if (!section.relocations().relocation_count())
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return IterationDecision::Continue;
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found_relocations = true;
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if (!section.relocations().entry_count()) {
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printf("Relocation section '%s' at offset 0x%08x contains zero entries.\n", section.name().to_string().characters(), section.offset());
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return IterationDecision::Continue;
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}
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printf("Relocation section '%s' at offset 0x%08x contains %u entries:\n", section.relocations().name().to_string().characters(), section.relocations().offset(), section.relocations().entry_count());
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printf(" Offset Type Sym Value Sym Name\n");
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section.relocations().for_each_relocation([](const ELF::Image::Relocation& reloc) {
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printf(" 0x%08x ", reloc.offset());
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printf(" %-17s ", object_relocation_type_to_string(reloc.type()));
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printf(" 0x%08x ", reloc.symbol().value());
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printf(" %s", reloc.symbol().name().to_string().characters());
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printf("\n");
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return IterationDecision::Continue;
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});
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printf("\n");
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return IterationDecision::Continue;
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});
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if (!found_relocations)
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printf("No relocations in this file.\n");
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printf("\n");
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}
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if (display_unwind_info) {
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// TODO: Unwind info
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printf("Decoding of unwind sections for machine type %s is not supported.\n", object_machine_type_to_string(header.e_machine));
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printf("\n");
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}
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if (display_core_notes) {
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// TODO: Core notes
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auto found_notes = false;
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interpreter_image.for_each_program_header([&found_notes](const ELF::Image::ProgramHeader& program_header) {
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if (program_header.type() != PT_NOTE)
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return IterationDecision::Continue;
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found_notes = true;
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printf("Displaying notes section '%s' at offset 0x%08x of length 0x%08x:\n", object_program_header_type_to_string(program_header.type()), program_header.offset(), program_header.size_in_image());
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// FIXME: Parse CORE notes. Notes are in JSON format on SerenityOS, but vary between systems.
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printf("%s\n", program_header.raw_data());
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return IterationDecision::Continue;
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});
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if (!found_notes)
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printf("No core notes in this file.\n");
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printf("\n");
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}
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if (display_dynamic_symbol_table || display_symbol_table) {
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// TODO: dynamic symbol table
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if (!interpreter_image.symbol_count()) {
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printf("Dynamic symbol information is not available for displaying symbols.\n");
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printf("\n");
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}
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auto found_dynamic_symbol_table = false;
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interpreter_image.for_each_section([&found_dynamic_symbol_table](const ELF::Image::Section& section) {
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if (section.name() != ELF_DYNSYM)
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return IterationDecision::Continue;
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found_dynamic_symbol_table = true;
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if (!section.entry_count()) {
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printf("Symbol table '%s' contains zero entries.\n", ELF_DYNSYM);
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return IterationDecision::Continue;
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}
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printf("Symbol table '%s' contains %u entries.\n", ELF_DYNSYM, section.entry_count());
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// TODO: display dynamic symbol table
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return IterationDecision::Continue;
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});
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if (!found_dynamic_symbol_table)
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printf("No dynamic symbol information for this file.\n");
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printf("\n");
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}
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if (display_symbol_table) {
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if (interpreter_image.symbol_count()) {
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printf("Symbol table '.symtab' contains %u entries:\n", interpreter_image.symbol_count());
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printf("Symbol table '%s' contains %u entries:\n", ELF_SYMTAB, interpreter_image.symbol_count());
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printf(" Num: Value Size Type Bind Name\n");
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interpreter_image.for_each_symbol([](const ELF::Image::Symbol& sym) {
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@ -441,7 +571,7 @@ int main(int argc, char** argv)
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printf("%08x ", sym.size());
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printf("%-8s ", object_symbol_type_to_string(sym.type()));
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printf("%-8s ", object_symbol_binding_to_string(sym.bind()));
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printf("%s", sym.name().characters_without_null_termination());
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printf("%s", StringView(sym.name()).to_string().characters());
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printf("\n");
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return IterationDecision::Continue;
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});
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