binder_alloc_mmap_handler(9)

📦 version 7.3.1, in nixpkgs unstable

💅 binder_alloc_mmap_handler(9) 💅

okay bestie, welcome to the Kernel API Manual — this is the page for binder_alloc_mmap_handler, and yes it's a kernel function, no it's not scary, we've got this 🫶

✨ NAME ✨

binder_alloc_mmap_handler — the girl who maps the virtual address space for a proc 🌈

✨ SYNOPSIS ✨

int binder_alloc_mmap_handler (struct binder_alloc *alloc , struct
vm_area_struct *vma );

like, it takes two things and hands you back an int, that's the whole vibe ✨

🎀 ARGUMENTS 🎀

  • alloc — the alloc structure for this proc 👑 like, this is the one carrying the whole allocation setup, okay?
  • vma — the vma that got passed on over to mmap 🦋 the virtual memory area in question, bestie

🌸 DESCRIPTION 🌸

so binder_mmap calls this one to initialize the space specified in vma so that binder buffers can be allocated in it 💖 that's it, that's the job, and she does it slayfully.

basically: you bring her a vma, she sets up that space all nice and ready for binder buffer allocation. not me being obsessed with how clean that is 😭

⭐ RETURN ⭐

the vibes she returns, and what they mean, fr fr:

  • 0 = success 🎉 periodt, we mapped
  • -EBUSY = address space already mapped 🙈 someone got here first
  • -ENOMEM = failed to map memory to given address space 💀 it happens, we move on

👑 SEE ALSO 👑

the whole friend group, honestly 🧚

ngl, this page's source lives in ./drivers/android and it's dated October 2026 — so that's the lore, that's the citation, we love a documented moment 💅✨

and that's the page, bestie!! ur welcome, go map some address space responsibly 💜🎀🦋

📦 where this page comes from