"Does it matter to Linux whether the stacks in user codes run up
(pointer starts at a low address and increments to get more memory)
or down (pointer starts at a high address and decrements to get
more memory)? If it does matter, which is preferred?"
More details (some stuff removed to protect the guilty :-)
> : 1) Grow toward increasing addresses. Reason in favor: This significantly
> : reduces the probability that a user overrunning the bounds of a local
> : array will wipe out the traceback information that goes onto the
> : beginning of the routine's local stack segment. From experience, this
> : sort of problem is 10 to 20 times more likely on OS-A (where the stack
> : grows down) than OS-B (where the stack grows up).
> :
> : 2) Grow toward decreasing addresses. Reason in favor: OS-A does it this
> : way. OS-C also. Because of the way the stack memory segment is set up,
> : the usual argument about stack coming down and heap growing up in the
> : same address space is irrelevant on this system.
Thanks.
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