Obtain function pointers for existing block device driver to intercept?

[Thesola10]

Hello

I'm looking to write a UMD driver which redirects some reads to a given patch file, and I'm currently working off of the Inferno2 driver.

I get the gist of the block device driver system, but wanted to know if there is a way to retrieve a sceIoDrv structure or similar for an already loaded driver (in this case the umd9660) driver, which I could use for reading non-patched areas?

Thanks!

[JoseAaronLopezGarcia]

Maybe this:
https://github.com/PSP-Archive/ARK-4/blob/9d861713baf1c7aae84924b0ef6924896b4d3eb0/core/compat/vita/filesystem.c#L223

[Thesola10]

Thanks for the pointer, looking further through ARK source I found precisely what I was looking for:
https://github.com/PSP-Archive/ARK-4/blob/9d861713baf1c7aae84924b0ef6924896b4d3eb0/core/systemctrl/src/sctrl_hen.c#L53