Buffer overflow protection: Difference between revisions

Revision as of 13:28, 7 January 2020

Revision as of 17:28, 11 May 2020

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In [[C (programming language)|C]], a function may contain many different per-call data structures. Each piece of data created on call is placed in the stack frame in order, and is thus ordered from the end to the beginning of memory. Below is a hypothetical function and its stack frame.

<sourcesyntaxhighlight lang="c">

int foo() {

int a; /* integer */

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return *b; /* read from b and pass it to the caller */

}

</syntaxhighlight>

</source>

(d..)(c.........)(b...)(a...)(CTLI)(RETA)