Interfacing user processes an kernel in high level language

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Abstract
We present a method to simplify the implementation of a kernel supporting a high level concurrent language on a bare multiprocessor system.User and system level languages (with as much common syntax as possible) are defined. The system language consists of those constructs which do not require concurrency support, plus other facilities which make it well suited to write the kernel supporting the user language. Such constructs must provide the equivalent of a supervisor call interface within a high level language.All machine dependencies for both the system and user languages have been encapsulated in the code generation phase of the compilation process. Our method reduces the retargeting problem of a kernel to the orientability problem of the code generator.Finally our experiences in using such methodology are discussed.

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