[ECOS] Re: Writing file to host system's OS filesystem

[Alex Schuilenburg]

Andrew Lunn wrote:

> On Wed, Aug 18, 2004 at 05:29:53PM +0000, Samie Hassan Ghauri wrote:
> 
>>Thanks for your advise on how to access a file by including a romfs image 
>>in my code.
>>
>>I was just wondering could you suggest any idea on how can I write any file 
>>to my host OS (i.e Win XP)?
> 
> 
> Its not realy your host OS. Its just another OS that can run on the
> same machine at some other time. You don't run eCos on top of M$ XP
> unlike the synthetic target which does run as a process on Linux.
> 
> There is currently no way to do what you want. 

Actually there is.

There was a project to produce semi-hosted libraries (e.g. fileio 
operations were performed on the host rather than the embedded target) 
which included changes+extentions to gdb, as well as target run-time 
libraries.  This was obviously not specific to eCos, nor was any work 
done in eCos to support these gdb extensions, but if these extensions 
were completed and released as part of gdb, I suspect an ecos 
semi-hosted library would be feasible.

However, I don't know if this project was ever finished or released 
publically.  Maybe one of the project members would care to comment?

-- Alex

> 
> What you might find interesting is to make your machine run Linux and
> then use the synth target. Using the system call backdoor you can then
> access the native host OS Kernel, ie Linux, and so access its
> filesystem. You have to be carefull when you do this though. Search
> the email archive, its been discussed before.
> 
>         Andrew
> 



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