Files
rea/docs/elf-notes.md
T
morluto 5f702dd6cc fix(parsers): preserve format boundaries and query occurrence identity
Normalize parsed facts at their owning boundaries across PE exports and certificates, ELF section names, GPU bundles, IL2CPP generic types, dyld slice selection, source maps, environment replay, and JavaScript mapped arguments. Preserve partial facts and explicit unsupported cases; clarify the corresponding documentation.

Validation: 831 affected tests passed with one existing skip across 23 files; build, typecheck/lint, documentation, formatting, and 2133-file test discovery passed. Format controls are synthetic; real Unity, GPU, and ARM-device execution is unverified.

Fixes #6709
Fixes #6688
Fixes #6719
Fixes #6718
Fixes #6704
Fixes #6703
Fixes #6692
Fixes #6723
Fixes #6687
Fixes #6726
Fixes #6696
Fixes #6691
Fixes #6727
2026-10-23 22:01:16 +08:00

2.6 KiB

ELF note tables

inspect_elf_notes / inspect-elf-notes answers whether one selected local ELF32/ELF64 image declares PT_NOTE program headers or SHT_NOTE sections, which note owners and types those tables store, and which GNU build-id or ABI-tag fields those notes carry. It reads the file without executing it and does not require a disassembler, debug package, or package catalog.

rea inspect-elf-notes /absolute/path/to/program --json

The CLI resolves relative paths against the caller's working directory. MCP requires an absolute filesystem path and preserves that exact selection:

{
  "name": "inspect_elf_notes",
  "arguments": { "path": "/artifacts/program" }
}

Observations

The inline Evidence result contains the artifact path, SHA-256, and byte length. tables lists each declared note program header or section, including the section name when a string table is present. Zlib-compressed section-name tables are decompressed within the selected file-size budget. An unsupported compression type leaves section names unknown and adds a limitation; note bytes remain independently examined. Each entries[] item reports owner, type, descriptor SHA-256, and a hex preview for descriptors of 64 bytes or less.

For GNU notes, gnu.build_id_hex, gnu.abi_tag, or gnu.gold_version are filled when the descriptor matches that type. Other owners keep gnu null.

PT_NOTE and SHT_NOTE are examined independently. The same file range may appear twice when both tables declare it.

A missing table list is observed absence of those declarations. It is not proof the image never carried notes in another container or overlay.

Limits and failures

The selected file is limited to 64 MiB by default (512 MiB maximum). At most 32 note entries are examined by default across every table. Retained note names, section names, and GNU descriptor text share a scan budget based on the source bytes plus any decoded section-name table, capped at max_file_bytes. The raw source and decoded table must also fit together within that ceiling; repeated table ranges count again. Each descriptor range is hashed once, and each GNU version's trailing NUL run is scanned once; neither walk may exceed that byte ceiling. Malformed ELF headers, truncated header tables, declared note tables that extend past the file, and truncated note entries fail without partial success. ELF extended numbering (PN_XNUM, including a section count stored when e_shnum is 0) is unsupported.

This workflow does not execute the image or verify GNU build-id uniqueness against package catalogs.