Slic : Secure Loadable Interposition
نویسندگان
چکیده
This paper presents a method for extending operating system functionality in a way that is secure, eecient, simple, requires no kernel source changes, and is compatible with existing application binaries. Our approach is to enable extensions of the system call interface by loading a device driver into the kernel that redirects system calls to extension code running either in the kernel or in a user-level process. As a proof of concept, we have implemented a prototype of our system, Secure Loadable Interposition Code (Slic), on Solaris 2.4. Measurements of our prototype implementation demonstrate that extensions can be added with little runtime overhead. We have also implemented several extensions using Slic, which illustrates the functionality provided and demonstrate good performance.
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Interposition as an Operating System Extension Mechanism
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