;; SPDX-FileCopyrightText: © 2025 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 nodedev.unconfined

    (call .mem.readwrite.type (typeattr)))