Date: Mon, 24 Sep 2001 17:27:27 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Ian Dowse <iedowse@maths.tcd.ie> Cc: Julian Elischer <julian@elischer.org>, hackers@FreeBSD.ORG Subject: Re: VM Corruption - stumped, anyone have any ideas? Message-ID: <200109250027.f8P0RRk97980@earth.backplane.com> References: <200109250048.aa97220@salmon.maths.tcd.ie>
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:In message <200109242322.f8ONMaT97469@earth.backplane.com>, Matt Dillon writes:
:>
:> Hmm. Do we have a guard page at the base of the per process kernel
:> stack?
:
:As I understand it, no. In RELENG_4 there are UPAGES (== 2 on i386)
:pages of per-process kernel state at p->p_addr. The stack grows
:down from the top, and struct user (sys/user.h) sits at the bottom.
:According to the comment in the definition of struct user, only
:the first three items in struct user are valid in normal running
:conditions:
Ok. I'm going to add a magic number to the end of the process
structure and check it in mi_switch() in -stable.
-Matt
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