Legacy code: mmap zero page: Operation not permitted - where should i start?

I've to deal with old C- Sourcecode. After I managed to compile it, while running it I get the error message

mmap zero page: Operation not permitted

Sometimes followed by an Segmentation fault.

I've read some stuff about the mmap() command, but I can't get around, where this error message comes from and how I should deal with it.

Can I "reena开发者_JS百科ble" it? (The program used to work with an older Linux System).

I'm working with Ubuntu 11.04 and GCC 3.4

Any hints very much appreciated :-)

thanks Markus

Mapping the zero page is disabled by default, as a security measure (doing so can make some NULL pointer dereference bugs exploitable).

You can re-enable it by setting the vm.mmap_min_addr sysctl to 0 (also available at /proc/sys/vm/mmap_min_addr). You should be able to make this the default at boot on Ubuntu by adding vm.mmap_min_addr = 0 to /etc/sysctl.conf.