glibc: loading of shared objects with holes wastes address space

[Ian Lance Taylor]

Mathias Krause <minipli@googlemail.com> writes:

> I see. So the real problem are the holes themselves. If there wouldn't
> be any gap between two adjacent segments, then there would be no need
> to stuff them. And honestly, currently those holes are not needed at
> all. Neither the glibc nor the kernel seem to honor the alignment
> requirements when searching for a suitable address. So the question
> is: Why are the sections in the linker script aligned to MAXPAGESIZE
> instead of PAGESIZE, i.e. aligned to 2 MiB instead of 4 KiB? But it
> looks like this is more of a question for the binutils folks (CCed).

Because then the executable will still run on some hypothetical future
kernel that uses larger page sizes.

Ian