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;; SPDX-FileCopyrightText: © 2024 Dominick Grift <dominick.grift@defensec.nl>
;; SPDX-License-Identifier: Unlicense
(block mem
(filecon "/dev/mem" char nodedev_context)
(filecon "/dev/port" char nodedev_context)
(blockinherit .nodedev.template)
(call .nodedev.exception.type (nodedev))
(block read
(macro type ((type ARG1))
(typeattributeset typeattr ARG1))
(typeattribute not_typeattr)
(typeattribute typeattr)
(typeattributeset not_typeattr (not typeattr))
(neverallow not_typeattr mem.nodedev (chr_file (read))))
(block readwrite
(macro type ((type ARG1))
(typeattributeset typeattr ARG1))
(typeattribute typeattr)
(call read.type (typeattr))
(call write.type (typeattr)))
(block write
(macro type ((type ARG1))
(typeattributeset typeattr ARG1))
(typeattribute not_typeattr)
(typeattribute typeattr)
(typeattributeset not_typeattr (not typeattr))
(neverallow not_typeattr mem.nodedev (chr_file (append write)))))
(in dev.unconfined
(call .mem.readwrite.type (typeattr)))
(in nodedev.unconfined
(call .mem.readwrite.type (typeattr)))
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