Poster: Memory protection in ultra-low-power multi-application wearables

Taylor Hardin, Josiah Hester, Patrick Proctor, Jacob Sorber, David Kotz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

An increasing number of wearable devices support the execution of multiple third-party applications, increasing the functionality and exibility of these devices. These multiapplication, multi-tenant devices provide users with more options, and application developers with a standard platform. Typical ultra-low-power wearable devices, however, lack the type of hardware memory protection mechanisms - such as Memory Management Units (MMU) - needed to safely separate applications. At best, they provide a Memory Protection Unit (MPU), which allows the user to configure read/write/execute permissions for a few distinct regions of memory. At worst, no hardware memory protection is provided. MPU capabilities vary across hardware platforms, with many shortcomings: (1) the MPU may only support a few distinct memory regions (fewer than one per application), (2) the MPU may not protect all regions of memory, like hardware registers, and (3) MPU protection boundary rules can be arcane, because they depend on opaque hardware implementations. Our key observation is that by supplementing a limited segment MPU with runtime checks, and using compile-time static analysis to explicitly layout applications in memory, we can guarantee application isolation (sandboxing) even on these limited MPUs, with lower overhead than software-only solutions.

Original languageEnglish (US)
Title of host publicationMobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services
PublisherAssociation for Computing Machinery, Inc
Pages170
Number of pages1
ISBN (Electronic)9781450349284
DOIs
StatePublished - Jun 16 2017
Event15th ACM International Conference on Mobile Systems, Applications, and Services, MobiSys 2017 - Niagara Falls, United States
Duration: Jun 19 2017Jun 23 2017

Publication series

NameMobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services

Other

Other15th ACM International Conference on Mobile Systems, Applications, and Services, MobiSys 2017
CountryUnited States
CityNiagara Falls
Period6/19/176/23/17

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Software
  • Hardware and Architecture

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