rminnich
commented
3 years ago This works, I like the switch as opposed to the if, the assembly is basically the same and the switch gives a pattern for future handlers; but I like dan's assembly code and will probably change to match his suggestion. But the next step is to change the name and type signature of rdmsr, so I'll make those tweaks in the next pass. Thanks everyone for the reviews!!
Add labels in rdmsr to indicate which path to take on a failure.
Add GPF handler.
In GPF handler, switch on ureg->pc value, and if an address is handled, fix uref->pc.
This is basically what is done in linux, minus all the fancy ELF and linker set machinations. It will work just fine.
Signed-off-by: Ronald G. Minnich rminnich@gmail.com