--- Jeremy Andrus <jandru39@calvin.edu> wrote: > Everyone's responses have been helpful so far :-) > I have another question. I've decided to use the 'copy_from_user' > function, but I don't know how I'm supposed to discover the > userspace > address I need to copy from. The data I want to get into the kernel > is > in a variable in a userspace function. > Usually, the address is passed to the driver in a call to one of its entry points. The ioctl entry point is commonly used for such things. Implement an ioctl entry point, then call it from your application and pass the address. In the driver, save the address in a variable or data structure for when you need it for the copy_from_user call. Perhaps this link will help: http://www.xml.com/ldd/chapter/book/ch05.html#t1 Harmony, --Christine __________________________________________________ Do You Yahoo!? Yahoo! Health - Feel better, live better http://health.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
