Alan Cox wrote:
> /* kludge to pass faulting virtual address to sendsig */
> frame->tf_err = eva;
>
> return((rv == KERN_PROTECTION_FAILURE) ? SIGBUS : SIGSEGV);
> }
>
> Up until this point, frame->tf_err tells me details about the page
> fault, such as whether it was a read or a write access. I'd really
> like that information to make it out to user-level in addition
> to the faulting address. In other words, we should find another
> way to pass the faulting address to sendsig than by overwriting
> frame->tf_err.
Sounds reasonable to me.
> P.S. This also reminds me that FreeBSD is non-standard relative
> to Linux and all of the major vender commercial Unices in that a disallowed
> access, such as a write to a read-only region of memory, generates
> a SIGBUS rather than a SIGSEGV.
Yes, this even violates the 1996 POSIX spec.
John
---
John Polstra [EMAIL PROTECTED]
John D. Polstra & Co., Inc. Seattle, Washington USA
"No matter how cynical I get, I just can't keep up." -- Nora Ephron
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