[U-Boot] [PATCH] sandbox: Add improved RAM simulation

Mike Frysinger vapier at gentoo.org
Tue Nov 1 21:10:19 CET 2011


On Tuesday 01 November 2011 15:01:55 Matthias Weisser wrote:
> Am 01.11.2011 19:52, schrieb Mike Frysinger:
> > On Tuesday 01 November 2011 14:37:24 Matthias Weisser wrote:
> >> I don't know the memory layout strategies for all the Linux/Unix variant
> >> out there. But typically text/bss/data is in the lower address range
> >> (some megs above 0) and in the upper range (right under kernel space)
> >> there is space used for stack and shared objects. Even with ASLR the
> >> address I used in the patch should be mappable.
> > 
> > relying on any address layout behavior is doomed to fail.  and in this
> > case, it's unnecessary.  so let's not bother.
> 
> Accepted but not convinced :-) As the address passed to mmap is only a
> hint it will not fail. But I will remove the hint in V2 of the patch.

by "fail" i meant "relying on the address being the same all the time".  not 
"mmap returned MAP_FAILED".
-mike
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