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Date: Mon, 10 Jan 2022 14:30:17 +0100
From: Florian Weimer <>
To: Rich Felker <>
Cc: Nihal Jere <>,
Subject: Re: Dynamic linker segfault

* Rich Felker:

> By my understanding, p_align implies an understanding by the creator
> of the program that the load segment may be "over-mapped" (extra file
> contents visible and possibly executable) up to that alignment
> boundary due to page granularity. This isn't really a correctness
> contract but a security/hardening contract for folks who consider
> anti-ROP measures a boundary that should be enforced.

Not sure if I follow.  Do you mean p_align is purely for documenting
layout decisions by the link editor?  I suspect that the necessary
overlap would be visible by other means, too.


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