[9fans] exec() question

[erik quanstrom]

i'm sure i'm missing something obvious here, but exec has something
like this

        up->seg[ESEG] = newseg(SG_STACK, TSTKTOP-USTKSIZE, TSTKTOP/BY2PG);

(some versions may not have /BY2PG, but that's beside the point.)

what happens if there is already a segment at TSTKTOP-USTKSIZE
that has been faulted in?

i would think that argc, argv could end up in the wrong physical page.

- erik