> I noticed that the SWI handler in linux has a comment saying still
>have a problem with >4 argument functions. hat is this refering too?
I think that's a historical relic. 5 argument syscalls should be OK now.
>Also isn't checking the SWI constant expensive? You
>pollute your data cache with code, why check this when the syscall number
>is in a register?
The syscall number isn't in a register for the Linux/ARM syscall standard.
With hindsight that was probably a mistake though we need to check it anyway
for compatibility with BSD, RISC OS and so on. The way I plan to do
Linux/Thumb we will indeed put the syscall number in a register and ignore
the comment field.
p.
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