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ripatel @fd_ripatel
Joined June 2024
  • Tweets 48
  • Following 91
  • Followers 228
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ripatel retweeted
manofdutch@manofdutch
May 26
Replying to @sniffalt
Finished a cool map! Based of metro 2033!
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Linux 7.0 still does not support Intel CET indirect branch tracking (IBT) in usermode. Intel CPUs supporting IBT first appeared in 2021. Here's my patch series: lore.kernel.org/lkml/2026051…
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IBT enforces that indirect calls and jumps can't land on any arbitrary instruction, but one of these: [f3 0f 1e fa] endbr64 "jmp rax" to elsewhere causes a segfault SEGV_CPERR, defending against control flow hijacking (e.g. corrupt function pointer).
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This came up while adding control flow integrity to Firedancer's sandbox. One of the best Linux x86 jails out there, enforcing process isolation, namespaces, strict seccomp, landlock, MPK (user protection keys), CFI, and soon more. github.com/firedancer-io/fir…

IBT and shadow stack support by ripatel-fd Β· Pull Request #9791 Β· firedancer-io/firedancer

Update all compile units in Firedancer to support IBT and shadow stack. IBT attempts to prevent hijacking of indirect call / jmp, and shadow stack hardens against ROP attacks. Add a fd_shstk API fo...

github.com
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Frohe Ostern! πŸ•ŠοΈπŸ£βœοΈ
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Today we revived Richie's old blog, bpf.wtf. We'll be pushing a few PRs to add the new syscalls and keep it up to date. To this day, it's still one of the best resources for learning sBPF Assembly. No more Wayback Machine! Compiler disrespecters rejoice!

BPF.WTF β€” The Archived Works of Richard Patel

Archive of Richard Patel's Solana BPF assembly articles covering the SBF instruction set and Sealevel syscalls.

bpf.wtf
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Never lose your soul
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x.com/i/article/201814371684…

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ripatel retweeted
supermiles
@wedtm
20 Dec 2025
In the last 24 hours @triton_one has served nearly 24 PETABYTES of Solana history via Old Faithful.
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