Consequences of passing too few register parameters to a C function
2 days ago
- #Itanium Architecture
- #Undefined Behavior
- #Calling Conventions
- Passing too few parameters to a function leads to undefined behavior in C/C++, causing potential stack imbalance or memory corruption.
- On Itanium, NaT bits in registers and architectural call mechanisms enforce strict parameter passing, risking exceptions if parameters are missing.
- The open() function in Unix V7 exemplifies unsafe optional parameters, as missing arguments propagate undefined values to the kernel, highlighting historical design flaws.