# j00ru/windows-syscalls

Windows System Call Tables (NT/2000/XP/2003/Vista/7/8/10/11)

Repository: https://github.com/j00ru/windows-syscalls
Canonical: https://ross.abutalabs.com/products/windows-syscalls
Language: HTML
License Family: other
Last push: 2025-12-30T16:20:32+00:00

## Health v2 (maintenance only)
Score: 59/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 59, release rhythm 35, longevity 100
- inputs: {"age_days": 3016, "days_push": 246, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2631, forks 370 (observed 2026-08-28T04:07:05.612732+00:00)

## What it is
A collection of Windows system call tables extracted from ntoskrnl.exe and win32k.sys across nearly every Windows release from NT 3.x through Windows 11, in both 32-bit and 64-bit builds. Data is provided in CSV and JSON for programmatic use and as HTML tables for manual browsing.

## Use cases
- look up syscall numbers for a specific Windows version
- build Windows syscall fuzzing harnesses
- write version-independent direct syscalls in security tools
- research differences in NT kernel API surface across Windows releases
- map win32k syscall numbers for GUI subsystem research
- find which service pack introduced a given syscall

## When to choose
- you need authoritative syscall numbers across many Windows versions and architectures
- you are doing kernel research, exploit development, or syscall fuzzing on Windows
- you want machine-readable (CSV/JSON) syscall data

## When to avoid
- you need syscall tables for non-Windows operating systems
- you want a tool or library rather than static reference data
- you need documented, officially supported Win32 APIs instead of internal syscalls

## Facets
- artifact type: dataset
- maturity: active
- function: security, reverse-engineering, developer-tools
- domain: operating-systems, security, reverse-engineering, developer-tools
- platform: windows, cross-platform
- tags: windows-syscalls, syscall-tables, ntoskrnl, win32k, fuzzing-reference, csv

## Member repositories
- j00ru/windows-syscalls (main) score 59

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:05.612732+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:19:37.518360+00:00, confidence not recorded.
  - readme: https://github.com/j00ru/windows-syscalls (fetched 2026-08-28T04:07:05.612732+00:00, sha e86ad6e66c8f)
- Data as of 2026-08-30T08:39:29.467469+00:00.