March 2018 - Devel - lists.sel4.systems

3 open positions for Proof Engineers at Data61
by Gerwin.Klein＠data61.csiro.au 20 Mar '18

20 Mar '18

Data61 Seeking Proof Engineers ============================== We are are hiring again! If only there were a place where I could prove theorems for money, change the world, and have fun while doing it... Sounds too good to exist? In the Trustworthy Systems team at Data61 that's what we do for a living. We are the creators of seL4, the world's first fully formally verified operating system kernel with extreme performance and strong security & correctness proofs. Our highly international … [View More]team is located on the UNSW campus, close to the beautiful beaches of sunny Sydney, Australia, one of the world's most liveable cities. We are looking for 3 motivated proof engineers who want to join our team in Sydney, move things forward, and have global impact. We are expanding our team, because seL4 is going places. There are active projects around the world in - Automotive - because cars have been hacked enough - Aviation - for more security and safety for autonomous vehicles - Defence - protecting confidential information - Connected consumer devices - with security built in from the start - Spaceflight - because awesome To make these projects successful, we need to scale formal verification. You would - work on industrial-scale formal proofs in Isabelle/HOL - develop formally verified infrastructure for building secure systems on top of seL4 - contribute to improved proof automation and better reasoning techniques - apply formal proof to real-world systems and tools To apply for this position, you should possess a significant subset of the following skills. - functional programming in a language like Haskell, ML, or OCaml - first-order or higher-order formal logic - basic experience in C - ability and desire to quickly learn new techniques - undergraduate degree in Computer Science, Mathematics, or similar - ability and desire to work in a larger team We are hiring at two levels, so if you are more qualified or experienced than the above would suggest, you can come in as a senior proof engineer. If you additionally have experience - in software verification with an interactive theorem prover such as Isabelle/HOL, HOL4, or Coq, and/or - with operating systems and microkernels you should definitely apply! If you have the right skills and background, we can provide training on the job. Continual learning is a central component of everything we do. You will work with a unique world-leading combination of OS and formal methods experts, students at undergraduate and PhD level, engineers, and researchers from 5 continents, speaking over 15 languages. Trustworthy Systems is a fun, creative, and welcoming workplace with flexible hours & work arrangements. We value diversity in all forms and welcome applications from people of all ages, including people with disabilities, and those who identify as LGBTIQ. See https://ts.data61.csiro.au/diversity/ for more information. Salary ranges for this position, in AUD (plus superannuation): - Junior: 80-91K - Senior: 95-103K depending on experience and qualifications. Apply online at the following links: - https://jobs.csiro.au/job/Sydney%2C-NSW-Proof-Engineer/464792900/ - https://jobs.csiro.au/job/Sydney%2C-NSW-Senior-Proof-Engineer/464792300/ Your application should include a cover letter, CV, undergraduate transcript (if applicable), and contact information for two references. This round of applications closes 15 April 2018. The seL4 code and proof are open source. Check them out at https://seL4.systems More information about Data61's Trustworthy Systems team at https://ts.data61.csiro.au Still studying? We also have internship opportunities! https://ts.data61.csiro.au/students/ [View Less]

1 0

Unable to Compile Tutorial 2 Exercises
by Amit Goyal 20 Mar '18

20 Mar '18

Hi, I am new to sel4 and was thus practising the tutorials given at: https://wiki.sel4.systems/Tutorials While compiling tutorial 2 exercises, I got the attached error (I have also attached the main.c file). Can someone please help me in resolving it. -- Thanks and Regards, Amit Goyal

2 1

Ethernet driver for TK-1
by Michal Podhradsky 19 Mar '18

19 Mar '18

Hello, I would like to use a similar Ethernet driver component as for x86 platforms here: https://github.com/seL4/camkes-vm/tree/master/components/Ethdriver But in the camkes-vm-arm repository I don't see an equivalent component: https://github.com/SEL4PROJ/camkes-arm-vm/tree/master/apps/vm/components Is the ethernet currently just passed to Linux? And if so, what would entail making a new driver etc similar to x86 platforms? Regards Michal

2 1

VM and VMM Communication for ARM
by Daniel Wang 16 Mar '18

16 Mar '18

Hi all, I have a couple questions about VM an VMM communication for CAMKES-ARM-VM. Please correct me if I’m wrong. I found when VMM load Linux device it installs a vgic (install_linux_devices() -> vm_install_vgic()) But how exactly a interrupt caused by VM is distributed from GIC to VGIC (kernel to VMM)? I saw that we can register a virq to the VGIC (vm_virq_new()), but I’m not sure when a interrupt is generated how it is passed to the VGIC. Second, I found that we can install virtual … [View More]

1 0

irq_server example? Interrupt handlers?
by Richard Clark 14 Mar '18

14 Mar '18

Hi all! I have an Ethernet driver underneath an lwip implementation that I've gotten to run threaded tcpip. It happily passes messages back and forth and all around between half a dozen threads over a dozen ports all on localhost. Every once in a while though, it wants to send a packet to the outside world... this of course invokes the Ethernet driver, which rather annoyingly, is polled. I am looking for the proper way to convert my polled Ethernet driver to be interrupt-driven.... however the … [View More]

2 1

Questions about Vchan
by Daniel Wang 14 Mar '18

14 Mar '18

Hi all, I’m trying to figure out how to use the Vchan library to setup communication between guest OS and native components. I got couple questions how you can give me some advices. 1. I saw the camkes_vchan_con_t structure in the helloworld components (camkes-arm-vm), but I could not find the implementation for vchan_con_new_connection(), vchan_con_rem_connection(), etc. Are those autogenerated by camkes? If so how it is generated? static camkes_vchan_con_t con = { .connect = &… [View More]

4 5

seL4 developer review of RISC-V privileged ISA spec?
by Kelly Dean 14 Mar '18

14 Mar '18

The RISC-V privileged ISA is not yet finalized. Have the seL4 developers reviewed the draft [1], in case they might have any recommendations for improvement? For example, just last year a blunder (H-mode) was removed from the draft per a proposal [2] on the mailing list. Finalization is planned for this year. Speak now or forever hold your peace. The first public draft of the memory consistency model [3] was also released just last December. And platform standardization, especially the … [View More]

6 5

Questions about Allocman
by Daniel Wang 12 Mar '18

12 Mar '18

Hi all, I’m trying to understand the code a little bit more. This is kind of a random question. I’m wondering that in a case where we call to allocate a frame using allocman library, where is the physical address of a certain region is stored? In allocman_t there are multiple fields: size_t num_utspace_chunks; struct allocman_utspace_chunk *utspace_chunk; size_t *utspace_chunk_count; struct allocman_utspace_allocation **utspace_chunks; struct allocman_utspace_chunk { … [View More]

3 3

Share UART with Guest Linux
by Daniel Wang 09 Mar '18

09 Mar '18

Hi all, For experiment, I created a simple app along with the vmm using CamKES-ARM-VM repository. Currently the simple app only prints strings periodically using printf(). However as soon as the guest Linux starting running. I cannot print anything and also receives error as following: I assumes it is due to the iommu capability got assigned to Linux by VMM. Is there a way to allow native app also prints information on the screen using printf()? ------------------ libsel4muslcsys: Error … [View More]

1 1

Compilation Error with version
by Thad Seeberger 08 Mar '18

08 Mar '18

Good day. I am getting hung up compiling the CAmkES compiles. I'm getting following error which I believe is because the version.h.d does not exist. Where is the version set? thx [camkes-accelerator] building... -- Configuring done -- Generating done -- Build files have been written to: /home/xxxx/seL4_camkes_x86_64/stage/x86/pc99/accelerator ninja: error: '/home/xxxx/seL4_camkes_x86_64/tools/camkes/tools/accelerator/DEPFILE', needed by '.', missing and no known rule to make it make: *** [/… [View More]

4 8