The Sentry intercepts syscalls using one of several mechanisms, such as seccomp traps or KVM, with the default since 2023 being the seccomp-trap approach known as systrap.
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There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is: