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How to validate a SWI handle?
I am having a crash that I beleive is due to SWI handle corruption. From the BIOS API I did not see a way to validate the handle which would be useful in trying to track down my corruption. I proved my assertion by doing a SWI_post(0x0) and the processor crashes and never returns from the call. Is there some way to validate the handle? The API's do not have return codes so I am looking for some suggestions. I am using BIOS 5.33 on c55x.
I don't think there is a good way to check for a invalid SWI handle because there is no way of determining a valid handle from an invalid one (except checking for it being NULL).
I would check on why the handle would become corrupt in the first place. How are you creating the SWI object? Statically or dynamically? Are you checking for the SWI_create()'s return value? Is your system stack large enough? From where are you calling the SWI_post? If you are calling it from a HWI, have you wrapped it with a HWI_enter and HWI_exit?
You could also place the SWI Object in a different memory segment if you think it might be getting corrupt by another task.
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