ROM Hack Question Is there any exec() function in libnx/others SDK?

[SwitchMods]

Okay so let's assume that we have 3 executable files (NSO) in the exeFS called: main.nso, main2.nso and main3.nso
Is there any sdk exec function that I can call fom main.nso to boot (on the fly) main2.nso or main3.nso?

This is not a difficult function to implement, but require a lot of knowlege of Horizon and its executable loader. Basically it should load the executable, find its OEP and then call it (but idk if there are any software dependances that need to be loaded too)...

am I the first one trying to achieve this?

 

[hippy dave]

I have no idea about the libnx functions, but you could have a look at the homebrew menu source to see how it goes about loading & running nros. This looks like it: https://github.com/switchbrew/nx-hbmenu

 

[m4xw]

https://switchbrew.github.io/libnx/env_8h.html
envSetNextLoad

Only for NRO's tho.
For anything else you will need to come up with your own solution.

 

[hippy dave]

https://switchbrew.github.io/libnx/env_8h.html
envSetNextLoad

Only for NRO's tho.
For anything else you will need to come up with your own solution.

Cool, does it run when the current nro exits as normal?

 

[m4xw]

Cool, does it run when the current nro exits as normal?

Yes.
Thats how I do salamander too

 

[SwitchMods]

Thank you both (@hippy dave and @m4xw ) for your anwers, I'll give it a look.

I think that technically should be possible to edit envSetNextLoad to support NSO, by adding a parser of this executable format (atm I don't have this knownledge, but this is a documented format so it shouldn't be a problem).

We will see... any addition to this topic is welcome

 

[m4xw]

Thank you both (@hippy dave and @m4xw ) for your anwers, I'll give it a look.

I think that technically should be possible to edit envSetNextLoad to support NSO, by adding a parser of this executable format (atm I don't have this knownledge, but this is a documented format so it shouldn't be a problem).

We will see... any addition to this topic is welcome

https://github.com/Atmosphere-NX/Atmosphere/blob/master/stratosphere/loader/source/ldr_nso.cpp