Re: More about stacks
"Stephen Pelc" <[email protected]>
| Newsgroups | org.kernel.vger.linux-assembly |
|---|---|
| Message-ID | <43299100.16210.5C22D29@localhost> |
> The question I wanted to ask the list was that I know when you > want to expand the stack to make room for more data (particularly > when you're setting up local variables in C) you simply do a sub > on %esp, but my question is, how do you know when you do this > that you aren't violating data from some other process, or maybe > even data belonging to other sections of your code, .data for > example. In the main you don't know. A solution we have used before is to define your own stack, defining read-only guard-bands on either side of it. If the guard bands are written to, an exception is triggered. One of our clients had this problem when using too many layers of callback functions and consumed over 1Mb of stack space! Stephen -- Stephen Pelc, [email protected] MicroProcessor Engineering Ltd - More Real, Less Time 133 Hill Lane, Southampton SO15 5AF, England tel: +44 23 80 631441, fax: +44 23 80 339691 web: http://www.mpeltd.demon.co.uk - free VFX Forth downloads