[Question] Calling function from loaded module about vita-headers

[isage]

You need to generate stubs for your module (basically a static lib) and link with them. There's no dlsym-like functionality.
There's also no automatic loading.

If you want dlopen/dlsym functionality, you can use https://github.com/isage/vita-rss-libdl as reference (it'll need adjustments to work in kernel-space)

[jvulcan]

How do I generate those stubs for a vita kernel module?
Would that mean that I don't need to provide the skprx module anymore and it will be embedded to the vpk?
Thanks.

[isage]

https://github.com/vitasdk/vita-toolchain/blob/master/cmake_toolchain/vita.cmake#L162
No, you still need to provide and load skprx.
VPK is just a zip file. You can add your module there for your app to load (from app0:/...)

https://github.com/TheOfficialFloW/kubridge is a nice exaple of kernel module with exports and stubs (and handling userspace <-> kernelspace memory conversion)

[jvulcan]

Thank you, I'll check them out.

[jvulcan]

QUESTION. Can I just use the kernel functions in the VPK project? that way I could just put everything in the VPK instead of coding a library.
or making a kernel module has something special?
I'm looking to:

• handle SVC exceptions
• allocate data in an arbitrary virtual space range (it doesn't collide with user space)
• run byte asm code allocated in that arbitrary virtual space
  Thanks

[isage]

No. Apps run in userspace

[Princess-of-Sleeping]

It is possible to make a simple hook to svc. It may or may not be possible to allocate memory for any virtual space.

About any virtual space mapping, You need to learn ARM TTBR.

Edit
All your questions must be run in kernel space.

[jvulcan]

These are the virtual spaces I wanna use:
0x100000
The following spaces may or may not be used:
0xbf3000
0xd32000
0xd71000
0xded000
0xec0000
0x1082000
0xb00000
0xb84000
0xcba000

[jvulcan]

For the hook I will need to know what Thread called SVC along with the code (e.g. SVC 0x36 , I need to catch the 0x36) and state of registers.