binder_alloc...er_to_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

💅 binder_alloc...er_to_buffer(9)

okay so bestie, welcome to the Kernel API Manual ✨ — this little page is all about binder_alloc_copy_user_to_buffer, and yes the title up top is truncated exactly like that, we don't question it, we respect it 🎀

🌸 NAME 🌸

binder_alloc_copy_user_to_buffer — copy src user to tgt user

like, literally, it copies from a source user to a target user, no cap 💫

✨ SYNOPSIS ✨

unsigned long binder_alloc_copy_user_to_buffer (struct binder_alloc
*alloc , struct binder_buffer *buffer , binder_size_t buffer_offset ,
const void __user *from , size_t bytes );

she returns an unsigned long, she takes five args, she's booked and busy 🫶

🎀 ARGUMENTS 🎀

  • alloc — the binder_alloc for this proc. it's giving "this is your allocation, bestie" 💖
  • buffer — the binder buffer to be accessed. the main character of the whole operation 👑
  • buffer_offset — offset into buffer data. like where in the buffer we're pointing our little finger 🙈
  • from — userspace pointer to source buffer. the origin story ⭐
  • bytes — bytes to copy. how much we're moving, fr fr 💅

🦋 DESCRIPTION 🦋

Copy bytes from source userspace to target buffer.

that's it. that's the vibe. source userspace goes in, target buffer gets the goods, everyone slays 🔥

🌈 RETURN 🌈

bytes remaining to be copied — so like, if she comes back with 0 you're done, if she comes back with a number... keep going bestie, you got this 😭💜

💀 SEE ALSO 💀

Kernel file ./drivers/android/binder_alloc.c — the source of truth, iykyk 🧚

go read them all, they're iconic, periodt 💅✨

no warnings on this one, bestie — just copy your bytes and be free 🦋

and that's the page!! 🍓 this whole thing lives over in ./drivers/android, it's from October 2026, and it's part of the Kernel API Manual — mwah, love that for us 💖🎀🌸

📦 where this page comes from