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Subject[PATCH] i386 ptrace patch needed for user-mode port

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Jeff Dike wrote:

> Below is a small patch to ptrace which enables it to change system call
> numbers. This is needed in order to run the user-mode port.
>
> It adds range checks to ptrace and to the slow system call path.
>
> I've been feeding this sporadically to Linus for the last couple of months
> with no result. If anyone can clue me in as to what would make this more
> acceptable, please do so.

This patch also enables a feature in strace that lets it trace child
processes spawned by vfork(). I am strongly in favor of its inclusion.

I have been running an equivalent patch through several versions of
2.2.x for some months and have experienced absolutely no ill effects.

--

Nate Eldredge
neldredge@hmc.edu

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