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kernel-analysis-vphone600

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Analyze vphone600 kernel artifacts using the local symbol database and XNU source tree. Use when working on kernel reverse engineering, address-to-symbol lookup, release-vs-research kernel comparison, or patch analysis for vphone600 variants in this repository.

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Source SKILL.md: https://github.com/Lakr233/vphone-cli/blob/HEAD/skills/kernel-analysis-vphone600/SKILL.md

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Kernel Analysis Vphone600

Use the local research/kernel_info dataset as the first source of truth for symbol lookup. Use research/reference/xnu as the source-level reference for semantics and structure.

Required Paths

  • research/kernel_info/kernel_symbols.db
  • research/kernel_info/kernel_index.tsv
  • research/kernel_info/json/kernelcache.release.vphone600.bin.symbols.json
  • research/kernel_info/json/kernelcache.research.vphone600.bin.symbols.json
  • research/reference/xnu

If research/reference/xnu is missing, create it with a shallow clone:

mkdir -p research/reference
git clone --depth 1 https://github.com/apple-oss-distributions/xnu.git research/reference/xnu

Workflow

  1. Confirm scope is vphone600 only.
  2. Query kernel_symbols.db to select release or research dataset by name.
  3. Load the linked JSON symbol file and perform symbol/address lookups.
  4. Cross-reference candidate code paths in research/reference/xnu.
  5. Report findings with explicit kernel name, symbol path, and address.

Standard Queries

  • List known kernels:
    • sqlite3 research/kernel_info/kernel_symbols.db "select kernel_name, json_path from kernel_symbols order by kernel_name;"
  • Find one kernel by name:
    • sqlite3 research/kernel_info/kernel_symbols.db "select * from kernel_symbols where kernel_name='kernelcache.release.vphone600';"
  • Search symbol by substring in release JSON:
    • rg -n 'symbol_name_fragment' research/kernel_info/json/kernelcache.release.vphone600.bin.symbols.json
  • Search symbol by address in research JSON:
    • rg -n '0xfffffe00...' research/kernel_info/json/kernelcache.research.vphone600.bin.symbols.json

Output Rules

  • Always include which kernel was used: kernelcache.release.vphone600 or kernelcache.research.vphone600.
  • Always include exact symbol name and address when available.
  • Always distinguish fact from inference when mapping symbols to XNU behavior.
  • Avoid claiming coverage outside vphone600 unless explicitly requested.

References

  • Read references/kernel-info-queries.md for reusable SQL and shell query snippets.