Mulyadi Santosa napsal(a):
Hi...
I'm writing pseudo chardev and i need to pass some structure to
userspace. It includes strings and pointers to other structures. I
need to allocate userspace memory chunks and pass pointers to in into
userspace process where it can be used. Is there any chance to do it?
I think technically it is possible. Although I don't know the exact
how-to, it can be done by kmalloc(GFP_USER), and then creating proper
VMA (or insert the page to a VMA).
this can be done how?
However, I suggest another way. Pre allocate a chunk of memory, then
via interface such as /proc, pass the address to the related kernel
function. Let your kernel function acknowledge this address and pass
information to it.
the problem is that i do not know the size of data chunk before i ask
kernel to fill it.
What do you think?
regards,
Mulyadi
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