Matt Thomas <matt@3am-software.com> writes:

> Currently, ld.elf_so doesn't honor the alignment specified in a
> ELF file's psections.  This is due to the lack of ability to request
> an aligned block of addresses from mmap(2).  I propose we add a
> MAP_ALIGNED flag which would mean that the addr argument to mmap(2)
> would be the required alignment of the block.  Supplying both
> MAP_ALIGNED|MAP_FIXED would cause an error EINVAL to be returned.
> 
> Any thought on this proposal?

I'll note that the same effect can be achieved by requesting a region
of size double-alignment (e.g. requesting a 2M region when you want 1M
alignment) and then using munmap() to trim the edges down to the
aligned region inside it. Less efficent, of course, but quite
possible.

        - Nathan