Using assembler in debian on an intel platform. Is the %ESP register special in any way (except, of course, ist use in the POP and PUSH istructions and their friends.)
Let me clarify. On VMS (old VAX OS), the convnetion was that any data on the stack above the stacp poibter was forfeit -- at any time tod OS could come in and clobber it, even *during* instruction execution. Firthermore, the value of the stack pointer clued in the OS as to whether it chould create new pages to handle a page-fault exception, thereby extending the stack. As a result, if you used the stack pointer for anything other than pointing to the top of the stack, even momentarily, you were in deep, deep trouble. Are there simlar OS constraints imposed by the Linux kernel? How do pages get allocated to the stack, for example. Is the user's %ESP used in any way for this? Can I make any use of %ESP that I want? For example, can I allocate a lot of mini-stacks in garbage-collected storage to handle, say, a coroutine system, without interference? (And yes, it's a compressing garbage-collector. The stacks will move around every time garbage-collection occurs.) -- hendrik -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
