elf

Fix a divide by zero panic in GnuHashTable.find() for tables with nbloom = 0

Add new ElfBytes type with better ergonomics for parsing from a &[u8]
Add GnuHashTable which interprets the contents of a SHT_GNU_HASH section
Add convenience method section_header_by_name to ElfBytes and ElfStream
Add GnuBuildIdNote and parsing for NT_GNU_BUILD_ID note contents
Add GnuAbiTagNote and parsing for NT_GNU_ABI_TAG note contents
Add ElfBytes::symbol_version_table() to get the GNU extension symbol version table.
Add ElfBytes::find_common_data() to efficiently discover common ELF structures
Add a new endian-aware integer parsing trait impl
Add ParsingTable.is_empty()
Add abi constants for powerpc and powerpc64
Add abi constants for RISC-V
Add abi constants for x86_64
Add abi constants for ARM32 and ARM64 (AARCH64)
Add abi constant for GNU-extension ELF note name ELF_NOTE_GNU
Add abi constant for PT_GNU_PROPERTY
Add abi constants for SHN_ABS and SHN_COMMON
Add elf::to_str::d_tag_to_str()
Add elf::to_str::note_abi_tag_os_to_str()

Rename elf::File -> elf::ElfStream and make it specific to the Read + Seek interface
Rename gabi -> abi since it also includes extension constants
Make ELF structures generic across the new endian-aware integer parsing trait EndianParse
Refactor parsed Note type to be a typed enum
Rename ElfStream::dynamic_section() -> dynamic() to match ElfBytes
Change ElfStream::dynamic() to yield a DynamicTable just like in ElfBytes
Standardize ElfBytes' interfaces for the .dynamic contents to return a DynamicTable
Export the parsing utilities ParsingTable, ParsingIterator in the public interface
Refactor section_headers_with_strtab to work with files that have shdrs but no shstrtab
Remove redundant hash arg from SysVHashTable.find()
Expose Class in the public interface alongside FileHeader
Remove opinionated Display impl for file::Class
Remove section_data_as_symbol_table() from public ElfBytes interface
Change SymbolVersionTable::new() to take Options instead of Default-empty iterators
Change ElfStream to parse out the ProgramHeaders into an allocated vec as part of ElfStream::open_stream()
Change ElfStream to parse out the SectionHeaders into an allocated Vec as part of ElfStream::open_stream()

Properly parse program header table when ehdr.e_phnum > 0xffff
Fix OOM in ElfStream parsing when parsing corrupted files
Fix a divide by zero panic in SysVHashTable.find() for empty tables

Add more fuzz testing
Add some simple parsing smoke tests for the various sample architecture objects
Add sample object and testing with > 0xff00 section headers
Add a lot more doc comments to each of the modules

Expose Class and Endian in the public interface. These types are exposed in the FileHeader type and so they should also be accessible for users to inspect.

Add fuzz targets for parts of our ELF parsing interface via cargo-fuzz
Add SysVHashTable which interprets the contents of a SHT_HASH section
Add StringTable::get_raw() to get an uninterpreted &[u8]
Add ParsingTable.len() method to get the number of elements in the table
Add some note n_type constants for GNU extension notes.
Add default "to_str" feature to get &str for gabi constant names

Change File::segments() to return a ParsingTable instead of just a ParsingIterator
Change File's SectionHeader interfaces to provide a ParsingTable instead of just a ParsingIterator
Remove deprecated File::section_data_for_header() in favor of File::section_data()
Remove FileHeader wrapper types OSABI, Architecture, and ObjectFileType
Remove ProgramHeader wrapper types ProgType and ProgFlag
Remove Symbol wrapper types SymbolType SymbolBind SymbolVis
Remove wrapper type SectionType
Remove unhelpful SectionFlag wrapper type
Remove Display impl for FileHeader, SectionHeader, ProgramHeader, Symbol
Remove ParseError::UnsupportedElfVersion in favor of more general ParseError::UnsupportedVersion

Fix divide by zero panic when parsing a note with alignment of 0 (Error instead of panic)
Use checked integer math all over the parsing code (Error instead of panic or overflow)
Fix note parsing for 8-byte aligned .note.gnu.property sections (Successfully parse instead of Erroring)
Add size validation when parsing tables with entsizes (Error instead of panic)

Add File::symbol_version_table() interface to get the GNU extension symbol versioning table
Add Symbol.is_undefined() helper to check if a symbol is defined in this object
Add File::section_data() which opportunistically parses the CompressionHeader if present

Fix StringTable to return a ParseError on index out of bounds instead of panicking
Fix File::section_data_as_rels to properly parse Rels (not Relas)