| To: | "Jun Sun" <jsun@mvista.com> |
|---|---|
| Subject: | Re: FCSR Management |
| From: | "Kevin D. Kissell" <kevink@mips.com> |
| Date: | Tue, 24 Sep 2002 21:29:25 +0200 |
| Cc: | <linux-mips@linux-mips.org> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <008801c2639f$385b1b80$10eca8c0@grendel> <20020924103703.P14312@mvista.com> |
| Sender: | linux-mips-bounce@linux-mips.org |
From: "Jun Sun" <jsun@mvista.com>
> > Am I missing something, or is this a problem?
> >
>
> FPE exceptions, actually almost all exceptions, are cleared before their
> handlers are invoked. See kernel/entry.S and look for BUILD_HANDLER().
>
> Those macro defines are really mind-twisting and usually don't show up on
> grep radar...
Right you are. Thanks. Maciej gave me a bit of a scare there. ;-)
In an ideal universe, the unmodified FCSR which is correctly
passed as a parameter to handle_fpe() (now that I look at entry.S,
it all comes back.. ;-) would be passed on as part of the
signal "payload" if SIGFPE is caught, but at least things
aren't drastically broken.
Kevin K.
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