Messages in this thread | | | Date | Thu, 8 Jul 1999 14:51:48 +0200 (MET DST) | From | Elena Lazkano Ortega <> | Subject | help... |
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Hello,
I'm trying to understand how Linux modules work basically reading a documentation I got in Internet which has some gradually increasing complexity examples. The examples are about how to communicate with a character device and they use a function named "put_user" (to put the message in the kernel address space in the user address space). When I try to insert the module using this function I get an error message like "bad_user_access_length" that I believe comes from a file called "panic.c".
I know that the function is a macro defined in the file "segment.h" but I don't know exactly how it works. Can somebody help me or give a little explanation or some reference books that I could use?
Thans in advance!
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