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wausyscall is a tool for extracting Windows syscall numbers from usermode syscall wrapper dlls such as ntdll.dll or win32u.dll.
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README.md

Overview

wausyscall is a tool for extracting Windows syscall numbers from usermode syscall wrapper dlls such as ntdll.dll or win32u.dll.

It should support every platform Windows has ever run on natively so far!! (i386, amd64, arm, arm64, alpha, mips, ppc, itanium).

Usage & Installation

cargo install --path .

cargo install --git <url to git repo>

Usage: wausyscall <path> (function name) [--only-erroneus] [--help]

Invoking wausyscall on Windows with no arguments should work fine, and default to system provided ntdll.dll file. If running on other system, a path to the file should be provided.

--only-erroneus prints opcodes that are most likely improperly parsed.

Function name argument is not required. When provided, it looks up syscall number for the specified function name, but then on Windows, providing a path to the dll is required.

Limitations

Some of the functions which match to syscall regex, but are not syscalls, will return incorrect output.

--only-erroneus flag tries to print out problematic functions, yet it is not 100% accurate.