aarch64_insn_copy(9)

💅 aarch64_insn_copy(9) — a Kernel API Manual moment

okay so bestie, welcome to the aarch64_insn_copy(9) page, straight out of the Kernel API Manual. this one's short and sweet but she is important, so pay attention 🎀

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✨ NAME ✨

aarch64_insn_copy — copy instructions into (an unused part of) RX memory 🧚

like, she literally just copies instructions into a spare bit of RX memory. that's the whole vibe check.

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✨ SYNOPSIS ✨

noinstr void * aarch64_insn_copy (void *dst , void *src , size_t len );

yep, that's the whole signature. noinstr is right there in the front, do not lose her 💅

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✨ ARGUMENTS ✨

• dst — the address to modify. this is the spot you're messing with, bestie 🌸
• src — source of the copy. like, where the goods are coming from 🫶
• len — length to copy. how much of it you're taking, no more no less ⭐

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✨ DESCRIPTION ✨

okay so the actual tea: she's useful for JITs to dump new code blocks into unused regions of RX memory. that's it, that's the whole description, and honestly? iconic. JIT girlies stay winning 🔥

ngl, "unused regions" is doing a LOT of work in that sentence — the memory has to actually be unused, so mind your business and pick a free spot 🙈

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✨ SEE ALSO ✨

• Kernel file ./arch/arm64/kernel/patching.c — go read her, she's the main character here 👑
• aarch64_insn_set(9) — her sister page, also a baddie 💜

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and that's a wrap, bestie! 🦋 this little cutie came to you from ./arch/arm64/kernel, dated October 2026 — mwah, go forth and copy those instructions responsibly ✨💖