paulus at samba.org
Thu Jan 22 12:01:03 EST 2004
Etsushi Kato writes:
> Is there any way to check whether exception handling code is working
> correctly? Register usage in head.S and entry.S seems to be changed
> from 2.4, so perhaps I missed porting some part.
Yes - the main difference is that we now don't save all the registers
on the common interrupt/exception entries. We only save the volatile
registers, since the C code saves and restores all the nonvolatile
registers. We do this for external interrupt, decrementer and system
call, at least. Other exception entries that are likely to result in
sending a signal to the current process save all the registers.
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