---------- Forwarded message ---------- From: Pranav Sawargaonkar <[EMAIL PROTECTED]> Date: Jan 22, 2007 12:27 PM Subject: Re: Creating a "new" virtual address space for a process To: Joe Damato <[EMAIL PROTECTED]>
On 1/22/07, Joe Damato <[EMAIL PROTECTED] > wrote:
Hello - >This is my first time posting to the list, so please let me know if I >should expand on anything I mention here. I am working on the S4OS >project for FreeBSD with a couple friends and we are currently trying to >understand how to use the VM system in FreeBSD. >We have a process, (in this case it happens to be curproc or proc0), and >we would like to create a new virtual address space and allocate, say N >pages starting at address X.
To allocate new vmspace and vm_map you can use vmspace_fork() defined in vm/vm_map.c. We have been reading the fork() code to try
>to see how this would work, but got lost in some of the COW stuff. >We have some kernel data that needs to be copied out to userland, but we >can't seem to figure out how to actually set up that virtual address >space. I would attach a code snippet of the code we wrote to accomplish >this, but it is literally all guess work, and probably completely wrong. >Anyone know how to do this or even where to look to see an example of >this happening? >Thanks, >Joe _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to " [EMAIL PROTECTED] "
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