The Runtime Theory

A read() Request Crosses Into the Kernel

Follow a file read from a library wrapper through kernel dispatch and back with bytes, end-of-file, or an error.

The Runtime Theory Team05 stages

trace / request.md

USERSPACE CALLKERNEL ENTRYRESOLVEDESCRIPTOROBTAIN DATARETURN RESULT

readyThe program supplies a descriptor, destination buffer, and maximum byte count to its system interface.

The flow is based on the Linux read(2) contract. File types, kernel versions, and operating systems can use different internal paths.

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