#syscall — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #syscall, aggregated by home.social.
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io_uring без розовых очков: 5 граблей, которые сожгли мне неделю, и где он реально быстрее epoll
io_uring продавали как убийцу epoll. На деле на HTTP keep-alive разница 0-15%, иногда не в его пользу. Но на NVMe с queue depth 128 - в 3 раза быстрее. Честный разбор с бенчмарками, реальными граблями (SQPOLL, cancel race, partial recv) и почему Google отключил io_uring в ChromeOS.
https://habr.com/ru/articles/1039820/
#io_uring #epoll #asyncio #liburing #высокаянагрузка #ядроlinux #NVMe #tokiouring #glommio #syscall
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Freelang – a Libc-free, direct sys/kernel call language with weird concurrency
#HackerNews #Freelang #LibcFree #Syscall #Concurrency #Programming
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Freelang – a Libc-free, direct sys/kernel call language with weird concurrency
#HackerNews #Freelang #LibcFree #Syscall #Concurrency #Programming
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While sipping hot lemon tea 🍋🫖 and time to time visit on this damn thing ....bloody good 👍
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While sipping hot lemon tea 🍋🫖 and time to time visit on this damn thing ....bloody good 👍
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Linux system calls. The great equalizer across programming languages. Let's see how they are used in various programs.
#linux #programming #go #golang #c #syscall #systemprogramming #software
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Linux system calls. The great equalizer across programming languages. Let's see how they are used in various programs.
#linux #programming #go #golang #c #syscall #systemprogramming #software
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Ah yes, because who doesn't want to spend their weekend parsing ELF headers and translating memory access while pretending they understand #Armv7 CPU emulation? 🤓 By the end of this 8,336-word epic, you'll be the life of the party with your newfound ability to forward syscalls and handle exception exits. 🎉 #Goals
https://xnacly.me/posts/2025/building-a-minimal-viable-armv7-emulator/ #ELFheaders #emulation #syscall #handling #techenthusiast #weekendproject #HackerNews #ngated -
Ah yes, because who doesn't want to spend their weekend parsing ELF headers and translating memory access while pretending they understand #Armv7 CPU emulation? 🤓 By the end of this 8,336-word epic, you'll be the life of the party with your newfound ability to forward syscalls and handle exception exits. 🎉 #Goals
https://xnacly.me/posts/2025/building-a-minimal-viable-armv7-emulator/ #ELFheaders #emulation #syscall #handling #techenthusiast #weekendproject #HackerNews #ngated -
Syscall и cgo в Go
Привет, Хабр! В этой статье рассмотрим работу с системными утилитами в Go. Будем напрямую общаться с ядром, дергать системные вызовы и писать код на C, чтобы Go не чувствовал себя одиноким.
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Stratoshark: Computer debugging tool: like wireshark, but for system calls instead of network packets
https://stratoshark.org/
#via:hackernews #wireshark #debugging #syscall #strace #devops #linux #+ -
DPDK на динозаврах и гаишниках
Как часто менеджерам, дизайнерам и UX-исследователям приходится вникать в проблемы сетевого стека Linux-ядра? Подозреваю, что не часто. Но если вам пришлось это сделать, у меня хорошая новость! Я уже прошла этот путь, полный админских терминов и бесконечных аналогий, и подготовила краткое содержание в комиксах. Теперь вам не нужно будет переводить с технического на дизайнерский! Меня зовут Наташа, я UX-исследователь
https://habr.com/ru/companies/selectel/articles/858472/
#selectel #linux_kernel #syscall #kernel_bypass #dpdk #wbarticle
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Useful websites with Linux kernel syscall tables for various architectures and kernel versions
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Useful websites with Linux kernel syscall tables for various architectures and kernel versions
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Make Your Code Slower With Multithreading https://hackaday.com/2024/06/07/make-your-code-slower-with-multithreading/ #MULTITHREADING #SoftwareHacks #performance #profiling #spinlocks #syscall #futex #mutex #Perf+
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Make Your Code Slower With Multithreading https://hackaday.com/2024/06/07/make-your-code-slower-with-multithreading/ #MULTITHREADING #SoftwareHacks #performance #profiling #spinlocks #syscall #futex #mutex #Perf+
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Make Your Code Slower With Multithreading - With the performance of modern CPU cores plateauing recently, the main performance... - https://hackaday.com/2024/06/07/make-your-code-slower-with-multithreading/ #multithreading #softwarehacks #performance #profiling #spinlocks #syscall #futex #mutex #perf
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Make Your Code Slower With Multithreading - With the performance of modern CPU cores plateauing recently, the main performance... - https://hackaday.com/2024/06/07/make-your-code-slower-with-multithreading/ #multithreading #softwarehacks #performance #profiling #spinlocks #syscall #futex #mutex #perf
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Roughly two years ago I hacked together a small tool to automatically download the
#windows #docker images, extract the ntdll.dll from them and extract the #syscall numbers for that Windows version. This can be used for #shellcode and other #malware dev activities.I've finally pushed the code to GitHub and redeployed the website.
All the data is either available in the HTML tables, or as a JSON by appending
?format=jsonto the URL.Because it's just been redeployed, it's re-downloading all the images, so it will take a few hours until more Windows versions are indexed.
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Updated the article: Monitor file access by Linux processes
Linux is powerful with the help of small utilities like lsof and strace. They help with monitoring disk and file activity, of new and running processes. #linux #lsof #ltrace #strace #syscall
Link: https://linux-audit.com/monitor-file-access-by-linux-processes/
Feedback and boosts welcome 🤟
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Updated the article: Monitor file access by Linux processes
Linux is powerful with the help of small utilities like lsof and strace. They help with monitoring disk and file activity, of new and running processes. #linux #lsof #ltrace #strace #syscall
Link: https://linux-audit.com/monitor-file-access-by-linux-processes/
Feedback and boosts welcome 🤟
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I want to say a big thank you to:
Radare2
Ghidra
x64dbg
Qubes OSfinally but not least; 2 more:
- hfiref0x and to hasherezade
for the extremely useful repos like SysCallTables and crypto_utils they have made- https://github.com/hfiref0x/SyscallTables
- https://github.com/hasherezade/crypto_utils#hfiref0x
#hasherezade
#syscalltables #syscall
#radare2 #ghidra #x64dbg #qubes #Qubes_OS -
2024W07
OmniOS Stable is updated to
r151048o
This update requires a reboot
https://github.com/omniosorg/omnios-build/blob/44731424e67c8aaafe5c4e500fe7c4544a22f0f6/doc/ReleaseNotes.md#r151048o-2024-02-15OmniOS Extras updates include:
— OpenLDAP updated to 2.6.7
— VirtualBox updated to 7.0.14a
— BIND updated to 9.16.48 / 9.18.24
— Unbound updated to 1.19.1
— OpenVPN updated to 2.6.9
— Nginx updated to 1.25.4
— Listmonk updated to 3.0.0
And much more!SmartOS
20240208T000334Z
Interesting changes include:
— bhyve returns bogus cpuid 8000_001D leaf
— update pkgsrc-setup to 20240116
— Update curl to 8.6.0
— Update OpenSSL to 3.0.13
https://us-east.manta.joyent.com/Joyent_Dev/public/SmartOS/smartos.html#20240208T000334Z2024-02-15 bhyve Production User Call
https://www.youtube.com/watch?v=X1joWFfpTX8Mirroring OmniOS: The Complete Guide; Part One
https://antranigv.am/posts/2024/02/omnios-mirror-one/Booting OmniOS on Vultr
https://github.com/omniosorg/illumos-omnios/issues/1432Migrate a FreeBSD bhyve virtual machine to OmniOS
https://www.tumfatig.net/2024/migrate-a-freebsd-bhyve-virtual-machine-to-omnios/ZFS encryption and notification service on OmniOS
https://www.tumfatig.net/2024/zfs-encryption-and-notification-service-on-omnios/Configure OmniOS to use an authenticated SMTP relay (smarthost)
https://www.tumfatig.net/2024/configure-omnios-to-use-an-authenticated-smtp-relay-smarthost/Remotely install OmniOS on a Dell R620
https://www.tumfatig.net/2024/remotely-install-omnios-on-a-dell-r620/Dealing with USB Storage devices on OmniOS
https://www.tumfatig.net/2024/dealing-with-usb-storage-devices-on-omnios/Running OpenBSD on OmniOS using bhyve
https://www.tumfatig.net/2024/running-openbsd-on-omnios-using-bhyve/SMB shares using OmniOS, zones and ZFS
https://www.tumfatig.net/2023/smb-shares-using-omnios-zones-and-zfs/Add support for Emulex LPe35000/LPe36000 32Gb/64Gb fibre channel chipsets
https://www.illumos.org/issues/15391
https://github.com/illumos/illumos-gate/commit/e2d1a4340d8c7e04c758949b4fb4b1934fcf9330Provide
execvpe
https://www.illumos.org/issues/7125
https://github.com/illumos/illumos-gate/commit/a89c0811c892ec231725fe10817ef95dda813c06Port NFSv41 base
(Allows to enable and disable NFSv4 minor versions)
https://www.illumos.org/issues/15405
https://github.com/illumos/illumos-gate/commit/f44e1126d9eae71c48c5d1de51e24750c6ec20a4pcieadmdecodes readiness time reporting
https://www.illumos.org/issues/16233
https://github.com/illumos/illumos-gate/commit/8a300ed6ab165c8d46fd165c6d8a4de8a5b0b596Update
tzdatato 2024a
https://www.illumos.org/issues/16230
https://github.com/illumos/illumos-gate/commit/e15592c8dabdb93c1b45a4785db35f013e0b49f9illumos now recognizes QEMU/TCG as a hypervisor
https://www.illumos.org/issues/16139
https://github.com/illumos/illumos-gate/commit/2faf06a0ad863963d95ad569428e5e6e45255ab7https://news.illumos.am/2024w07/
#bhyve #cpuid #DellR620 #Emulex #FibreChannel #FreeBSD #illumos #NFS #OfficeHours #OmniOS #OpenBSD #PCIe #pcieadm #QEMU #SmartOS #SMB #Storage #syscall #tzdata #USB #Vultr #ZFS
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2024W07
OmniOS Stable is updated to
r151048o
This update requires a reboot
https://github.com/omniosorg/omnios-build/blob/44731424e67c8aaafe5c4e500fe7c4544a22f0f6/doc/ReleaseNotes.md#r151048o-2024-02-15OmniOS Extras updates include:
— OpenLDAP updated to 2.6.7
— VirtualBox updated to 7.0.14a
— BIND updated to 9.16.48 / 9.18.24
— Unbound updated to 1.19.1
— OpenVPN updated to 2.6.9
— Nginx updated to 1.25.4
— Listmonk updated to 3.0.0
And much more!SmartOS
20240208T000334Z
Interesting changes include:
— bhyve returns bogus cpuid 8000_001D leaf
— update pkgsrc-setup to 20240116
— Update curl to 8.6.0
— Update OpenSSL to 3.0.13
https://us-east.manta.joyent.com/Joyent_Dev/public/SmartOS/smartos.html#20240208T000334Z2024-02-15 bhyve Production User Call
https://www.youtube.com/watch?v=X1joWFfpTX8Mirroring OmniOS: The Complete Guide; Part One
https://antranigv.am/posts/2024/02/omnios-mirror-one/Booting OmniOS on Vultr
https://github.com/omniosorg/illumos-omnios/issues/1432Migrate a FreeBSD bhyve virtual machine to OmniOS
https://www.tumfatig.net/2024/migrate-a-freebsd-bhyve-virtual-machine-to-omnios/ZFS encryption and notification service on OmniOS
https://www.tumfatig.net/2024/zfs-encryption-and-notification-service-on-omnios/Configure OmniOS to use an authenticated SMTP relay (smarthost)
https://www.tumfatig.net/2024/configure-omnios-to-use-an-authenticated-smtp-relay-smarthost/Remotely install OmniOS on a Dell R620
https://www.tumfatig.net/2024/remotely-install-omnios-on-a-dell-r620/Dealing with USB Storage devices on OmniOS
https://www.tumfatig.net/2024/dealing-with-usb-storage-devices-on-omnios/Running OpenBSD on OmniOS using bhyve
https://www.tumfatig.net/2024/running-openbsd-on-omnios-using-bhyve/SMB shares using OmniOS, zones and ZFS
https://www.tumfatig.net/2023/smb-shares-using-omnios-zones-and-zfs/Add support for Emulex LPe35000/LPe36000 32Gb/64Gb fibre channel chipsets
https://www.illumos.org/issues/15391
https://github.com/illumos/illumos-gate/commit/e2d1a4340d8c7e04c758949b4fb4b1934fcf9330Provide
execvpe
https://www.illumos.org/issues/7125
https://github.com/illumos/illumos-gate/commit/a89c0811c892ec231725fe10817ef95dda813c06Port NFSv41 base
(Allows to enable and disable NFSv4 minor versions)
https://www.illumos.org/issues/15405
https://github.com/illumos/illumos-gate/commit/f44e1126d9eae71c48c5d1de51e24750c6ec20a4pcieadmdecodes readiness time reporting
https://www.illumos.org/issues/16233
https://github.com/illumos/illumos-gate/commit/8a300ed6ab165c8d46fd165c6d8a4de8a5b0b596Update
tzdatato 2024a
https://www.illumos.org/issues/16230
https://github.com/illumos/illumos-gate/commit/e15592c8dabdb93c1b45a4785db35f013e0b49f9illumos now recognizes QEMU/TCG as a hypervisor
https://www.illumos.org/issues/16139
https://github.com/illumos/illumos-gate/commit/2faf06a0ad863963d95ad569428e5e6e45255ab7https://news.illumos.am/2024w07/
#bhyve #cpuid #DellR620 #Emulex #FibreChannel #FreeBSD #illumos #NFS #OfficeHours #OmniOS #OpenBSD #PCIe #pcieadm #QEMU #SmartOS #SMB #Storage #syscall #tzdata #USB #Vultr #ZFS
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Учимся понимать события подсистемы аудита Linux
Приветствую всех любителей изучать новое. Меня зовут Рома, и я занимаюсь исследованием безопасности ОС Linux в экспертной лаборатории PT Expert Security Center . В рамках инициативы нашей компании по обмену экспертными знаниями с сообществом я расскажу вам об известной многим администраторам системе журналирования в Linux-подобных ОС — подсистеме аудита Linux (auditd). При должной настройке она позволяет получать полную информацию о действиях, выполняемых в операционной системе. Специалистам по информационной безопасности полезно уметь расшифровывать и обрабатывать события auditd для отслеживания потенциально вредоносной активности. В связи с этим нам потребовалось организовать для них экспертную поддержку в системе мониторинга событий ИБ и управления инцидентами MaxPatrol SIEM . Подробнее
https://habr.com/ru/companies/pt/articles/789014/
#linux #kernel #siem #audit #man #security_expert_community #системные_вызовы #syscall
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Self-contained Linux applications with lone Lisp
https://www.matheusmoreira.com/articles/self-contained-lone-lisp-applications
#ycombinator #freestanding #standalone #self_contained #linux #application #system_call #syscall #lone #lisp -
Happy new year! 🎇
If your #NYE2023 resolution is to learn more about the #linux #kernel then we have you covered with this #EverythingOpen retro talk from #IBM's Rohan McLure, who walks us through his first kernel patch submission, which broke the #ABI. He takes us on a deep dive into #syscall and #architecture, and how he learned a lot by breaking things.
🎥 https://www.youtube.com/watch?v=Dvh-8czYDEk
Heavily discounted #EarlyBird #EB tickets still available, for a short time only:
https://2024.everythingopen.au/news/registrations-open/ -
If someone's interested in learning how #syscalls work on #Linux, I recommend to check out the overview below 👇
https://blog.packagecloud.io/the-definitive-guide-to-linux-system-calls/
It's a fascinating read that goes over software #interrupts, #sysenter & #syscall CPU instructions, #vDSO and more. BEWARE, it's a one-hour read!
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Very useful website if you need a quick reference to Linux kernel syscalls (numbers and parameters for various architectures and kernel versions)
