This patch-set aims at removing the current limit on argv+env space aka.
MAX_ARG_PAGES.
The new mm is created before the binfmt code runs, the stack is placed at the
highest address supported by that architecture.
The argv+env data is then copied from the old mm into the new mm (which is
inactive at that time - this introduces some cache coherency issues).
Then we run the binfmt code, which will compute the final stack address. The
existing stack will be moved downwards (or upwards on PA-RISC) to the desired
place.
This 'trick' heavily relies on the MMU, so for no-MMU archs we stay with the
old approach.
Tested-on: i386, ia64, frv, parisc, ppc64, um, x86_64
Patches against: .22-rc4
--
Changes since last time:
- fixed ia64
( va-space constraints )
- fixed ia64 CONFIG_IA32_SUPPORT
( brown paper bags and more va-space constraints)
- fixed powerpc
( address limit on stack extention )
- removed audit_kill() in favour of audit_panic()
- nicely spit out the patches
-
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