Looking at consequences of passing too few register parameters to a C function on various architectures
Summary
This article analyzes the consequences of calling a C function with too few parameters across architectures. It explains undefined behavior per the C/C++ standards, how different calling conventions handle missing parameters, potential stack and register corruption, and Itanium-specific quirks such as the NaT bit and architectural call rules. The piece emphasizes the importance of adhering to ABI rules to avoid crashes and subtle bugs.