March 2022 - Devel - lists.sel4.systems

hello_rumprun app not worked
by MOHAMAD REZA SHAFIEI 19 Apr '25

19 Apr '25

hi. i'm recently worked on sel4 with camkes framework. when i compile rumprun_hello on x86_64 platform its compiled and build correctly but when run with qemu by ./simulate script, program crashed with this errors: simple_get_extended_bootinfo_length@simple.h:600 simple_get_extended_bootinfo_length not implemented FAULT HANDLER: data fault from hello.hello_0_control (ID 0x1) on address 0x8, pc = 0x402b7f, fsr = 0x6 FAULT HANDLER: Register dump: FAULT HANDLER: rip :0x402b7f , . . so i found … [View More]

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seL4 test on x86
by Yevgeny Lavrov 30 Jan '25

30 Jan '25

Hello, I'm new to seL4 and I'm just doing it for learning purpose. I'm trying to run seL4 test suite or simple hello world task from seL4 tutorials on the real hardware. So far I had no problems compiling seL4 test suite and running via QEMU for both x32 and x64 platforms. However, when I try to run it on the actual hardware following Running on real hardware tutorial for x86 I end up with no output at all and no error msgs that can give me a clue on where something went wrong. After compiling … [View More]

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Stuck during invalidate local TLB in Tx2
by Muneeswaran Rajendran 16 Oct '24

16 Oct '24

Hi seL4 Dev team, Can someone explain the reason (share the reference) to invalidate the local TLB during kernel vspace activation as part CPU initialisation. The Tx2 board stuck while performing this operation. As per my understanding both Tx1 and Tx2 are using same A57 core. so the TLB initialisation and invalidation remain same for Tx2 and should not stuck during invalidation.Please correct me if anything wrong here. I understand from that instruction (tlbi vmalle1) which is invalidating … [View More]

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Questions about Memory Management in seL4
by Daniel Wang 19 May '23

19 May '23

Hi all, Sorry to bother, I have some basic questions about seL4 memory management. Can someone help me? 1. where is the kernel’s address space? I know there are basically three methods: a) separate virtual address space, e.g. through changing page tables on entry into privileged mode to access b) physical space, e.g. through disable automatic hardware translation of virtual addresses on entry into privilege mode c) privilege region in each process’s virtual address space, e.g. through … [View More]

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Overlapping pointer returned by memalign
by WILLIAMS Stephen 01 Apr '22

01 Apr '22

Hi, I’m currently working on a project porting drivers from U-Boot to seL4 and have run into an unexpected problem seemingly triggered by use of the memalign within the U-Boot drivers. What I am seeing is that calls to memalign from within my CAmkES component can return pointers to regions which overlap with those previously returned by malloc. Obviously this leads to the two allocated regions trampling over each other and resulting corruption of data. I’m at a complete loss to explain this … [View More]

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Re: How to switch virtual machines linux in vm_multi from camkes-vm-example?
by Peter Chubb 31 Mar '22

31 Mar '22

>>>>> "yjy" == yjy <yjy7894(a)126.com> writes: yjy> `screen /dev/ttyUSB0 115200`. I have a shell terminal that can yjy> see the output from VM0. I input @1 to shell, which is useless. It only works at the start of a line. Peter C yjy> At 2022-03-31 14:12:16, peter(a)chubb.wattle.id.au wrote: >>>>>>> "yjy" == yjy <yjy7894(a)126.com> writes: >> yjy> Hi, I have already run the camkes-vm-example vm_multi on my … [View More]

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How to switch virtual machines linux in vm_multi from camkes-vm-example?
by yjy 31 Mar '22

31 Mar '22

Hi, I have already run the camkes-vm-example vm_multi on my board, but i don't know how to switch linux vm shell from another linux vm, Can anyone help me solve this? Best, Comet

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Question for student research
by Seth Nielson 31 Mar '22

31 Mar '22

Hi. I am mentoring a student group trying to do some work on SEL4. We are trying to setup basic TCP/IP networking and are really struggling to find documentation or up-to-date guides. We found a project that has networking (it even has some filesystem and a small webserver as part of the project). We thought we just about had the networking component working for QEMU but there seems to be issues with QEMU and networking, at least the way we did it. Does anyone have any how-to guides for … [View More]

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Information for Additional Virtio Driver Support of Sel4
by Tao Heng 陶恒-SW 28 Mar '22

28 Mar '22

Hi list， Is there any specific plan or some related development for supporting the Additional Virtio Driver (* e.g Virtio Blk, Virtio RNG, Virtio Balloon), as you mentioned in READ.md of libsel4vmmplatsupport, especially for the Virtio Blk? 邮件免责申明 Email Disclaimer 本邮件仅供本邮件指定收件人使用，其所载内容可能因含有保密信息或其它原因而不得披露。除本公司及本邮件指定收件人外，任何人不得公开、传播、分发、复制、印刷或使用本邮件之任何部分或其所载之任何内容。如您误收到本邮件，请立即通知本公司，并将原始邮件、附件及其所有复本从系统中删除，切勿使用。 This email is for the use of the designated receivers only，and the content is not … [View More]allowed to be disclosed due to the confidential information or other reasons. Except for the Company and the designated receivers of this email, no one shall disclose, disseminate, distribute, copy, print or use any part of this email or any content contained therein. If you receive this email by mistake, please notify the Company immediately, and delete the original email, attachments and all copies from the system. Do not use it. 网络通信可能含有计算机病毒或其它缺陷，可能无法准确和/或及时送达其它系统，亦可能受阻而不为本公司或本邮件指定收件人所知。本公司对此类错误或遗漏以及任何因使用本邮件而引致之任何损失概不承担责任。 Network communication may contain computer viruses or other defects, which may not be delivered to other systems accurately and / or in time, or may be blocked by the Company or the designated receivers of this email. The Company shall not be liable for such errors or omissions and for any loss arising from this email. 本邮件所载任何内容仅作为业务层面交流与参考，除非明确说明，本公司不对邮件所载内容之准确性、完整性或公平性等承担任何法律责任。 Any contents contained in this email are only for the purpose of business communication and reference only. Unless explicitly stated otherwise, the Company shall not assume any legal responsibility for the accuracy, completeness or fairness of the content contained in the email. 本邮件指定收件人应特别注意：本邮件所载任何内容不构成本公司对本邮件指定收件人和/或其所属商业实体的任何要约、要约邀请或承诺，任何权利义务皆以双方签字盖章的书面文件为准。除经本公司以签字盖章的书面文件确认外，收件人和/或其所属商业实体不得以本邮件所载任何内容作为其向本公司主张任何权利或利益的正式依据。 The designated receivers should pay special attention to the fact that nothing contained in this email shall constitute an offer, invitation or acceptance by the Company to the designated receivers of this email and/or its affiliated business entities, and any rights and obligations are subject to the written documents signed and sealed by both parties. Except from the written document signed ,sealed and confirmed by the Company, the receivers and / or its affiliated business entity shall not rely on anything contained in this email as the formal basis for claiming any rights or interests to the Company. [View Less]

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propagating initial thread's capabilities
by Sam Leffler 28 Mar '22

28 Mar '22

The rootserver gets various caps setup for it by the kernel (see Table 9.1 in the manual). This includes the gobal ASID, IRQ, Domain, and Sched controllers. I need these caps in a process created by the rootserver. This is within a CAmkES environment. So far I've created CAmkES component attributes that signal the rootserver should hand-off a cap by moving the rootserver's cap to the designated CNode just before it terminates. This involves modifications to CAmkES, capDL, and the rootserver. Is … [View More]

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