Nios® II Processor Reference Guide

ID 683836
Date 10/22/2020
Public
Document Table of Contents

7.4.3.1. Stack Frame for a Function With alloca()

The Nios II stack frame implementation provides support for the alloca() function, defined in the Berkeley Software Distribution (BSD) extension to C, and implemented by the gcc compiler. The space allocated by alloca() replaces the outgoing arguments and the outgoing arguments get new space allocated at the bottom of the frame.

Note: The Nios II C/C++ compiler maintains a frame pointer for any function that calls alloca(), even if -fomit-frame-pointer is spec if ed
Figure 14. Stack Frame after Calling alloca()

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