#Function Parameters

Consequences of passing too few register parameters to a C function

This article examines how calling C functions with incorrect parameter counts—particularly too few parameters—can cause undefined behavior and memory corruption across different processor architectures, with the Itanium architecture providing the strictest enforcement through architectural controls that explicitly detect and fault on parameter mismatches. For IT organizations, this highlights a critical code quality and system stability risk: improper function calls can lead to unpredictable crashes, data corruption, and security vulnerabilities that are difficult to diagnose, making robust compile-time checking and code review practices essential safeguards in development environments.