Messages in this thread | | | Date | Tue, 26 Jun 2007 23:07:11 -0400 | From | Rik van Riel <> | Subject | Re: [patch 2/3] MAP_NOZERO - implement sys_brk2() |
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Davide Libenzi wrote: > The following patch implements the sys_brk2() syscall, that nothing is > other than a sys_brk() with an extra "flags" parameter. This can be used > to pass the new MAP_NOZERO bit, to ask the kernel to hand over non-zero > pages if possible.
Since programs can get back free()d memory after a malloc(), with the old contents of the memory intact, surely your MAP_NONZERO behavior could be the default for programs that can get away with it?
Maybe we could use some magic ELF header, similar to the way non-executable stack is handled?
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