9S08 micro - is RSP then exit subroutine okay?

[Circlotron]

I have a program where during a sub I check for a number of error conditions. If I find an error I want to exit the sub and JMP to an error handling routine instead of RTS and simply continuing on. Is RSP then JMP to whatever okay? The error handler would look after stuff I had set up manually, but besides the stack pointer being reset, are there other things I should be aware of? Written in assembly. I wouldn’t call myself a programmer.

[Benta]

RSP is unsuitable for this, it's an initialization instruction, don't mess with the stack pointer unless other solution is impossible.
I'd probably rather execute an SWI to land in the error correction routine and return with an RTI.
But perhaps I'm misunderstanding your need.

[grumpydoc]

Depends where you want to go after handling the error.

RSP stuffs 0xFF in the low byte of the stack pointer, it doesn't do anything else like setting the interrupt mask, so if wiping out the call stack and (say) returning to the start of your main loop is what you want to do after dealing with the error then it might well be OK to issue an RSP.

I think that's within the range of things which are plausible in the general case but as it's your code only you can say.