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Re: question about hurd

From: James A. Morrison
Subject: Re: question about hurd
Date: 11 Mar 2003 17:31:20 -0500

On Tue, 2003-03-11 at 17:39, Sebastien DI MERCURIO wrote:
> Hello,
> I've got a couple of question when looking at Hurd boot sequence. To 
> start the system, Grub (or any other multiboot bootloader) launch 3  
> modules : the kernel, the exec server and the filesystem server. But, 
> how thoses 3 modules know each other ? I can't figure out what low level 
> mecanisms are in use for that.
> Also, when a new module is loaded, how its interface, made of functions 
> and shared variables, is made accessible for other modules, library or 
> task ? For exemple, with the three modules (kernel, exec and 
> filesystem), how exec can know the entry point of a specific function of 
> the kernel or the filesystem ?
> I'm very interested in OS low level mecanisms and in Hurd specialy. 
> Maybe, when my level of knowledge will become better, I will be able to 
> contribute to this project, but for the moment, I need to learn more.
> Thank you
> Seb

 Currently RPC and IPC is done through mach ports.
CMU still has the documentation that OSF published at

I suggest you start at kernel principles.


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