:In message <[EMAIL PROTECTED]>, 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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