From: Paul Mackerras <paulus@samba.org>
To: Etsushi Kato <ekato@ees.hokudai.ac.jp>
Cc: Hollis Blanchard <hollisb@us.ibm.com>,
Linux/PPC Development <linuxppc-dev@lists.linuxppc.org>
Subject: Re: local_irq_enable() problem...
Date: Thu, 22 Jan 2004 12:01:03 +1100 [thread overview]
Message-ID: <16399.8399.251173.659871@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <60A99FA3-4BF7-11D8-A780-00039394E428@ees.hokudai.ac.jp>
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.
Paul.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-01-22 1:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-20 5:34 local_irq_enable() problem Etsushi Kato
2004-01-20 10:03 ` Geert Uytterhoeven
2004-01-20 13:34 ` Etsushi Kato
2004-01-20 15:55 ` Hollis Blanchard
2004-01-21 9:51 ` Etsushi Kato
2004-01-22 1:01 ` Paul Mackerras [this message]
2004-01-20 13:49 ` Sven Luther
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