[S390] mmap: consider stack address randomization

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Consider stack address randomization when calulating mmap_base for
flexible mmap layout . Because of address randomization the stack
address can be up to 8MB lower than STACK_TOP.
When calculating mmap_base this isn't taken into account, which could
lead to the case that the gap between the real stack top and mmap_base
is lower than what ulimit specifies for the maximum stack size.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2011-01-12 09:55:22 +01:00 • committed by Martin Schwidefsky

parent 7a63fa1a85

commit 9046e401e7

2 changed files with 12 additions and 1 deletions

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2

arch/s390/include/asm/elf.h

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11

arch/s390/mm/mmap.c

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