From owner-freebsd-current  Mon Jan 12 08:02:14 1998
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To: dyson@freebsd.org
Cc: current@freebsd.org
Subject: random (?) SIGBUS in -current
From: Poul-Henning Kamp <phk@freebsd.org>
Date: Mon, 12 Jan 1998 16:58:11 +0100
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I see random SIGBUS in programs now on current up to and including:

> dyson       1998/01/11 21:16:06 PST
> 
>   Modified files:
>     sys/i386/i386        machdep.c 
>   Log:
>   Adjust upwards the size of exec map in order to take into account the
>   additional PAGE_SIZE needed for exec operatino.
>   
>   Revision  Changes    Path
>   1.281     +2 -2      src/sys/i386/i386/machdep.c

I belive it is related to caching somehow.  It never seems to happen
on the first invocation of a program, but rather if I run a program
do something else, run the program again, then bang.

The ucode in trap() is T_PAGEFLT if that helps any.

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."