F22 System Wide Change: Harden all packages with position-independent code

[Jakub Jelinek]

On Mon, Jan 19, 2015 at 01:11:19PM +0100, Florian Weimer wrote:
> On 01/09/2015 12:54 PM, Jakub Jelinek wrote:
> 
> >Also, the number of relocations and
> >memory consumption got up.
> >Non-PIE cc1plus:
> >Relocation section '.rela.dyn' at offset 0x187d30 contains 190 entries:
> >Relocation section '.rela.plt' at offset 0x188f00 contains 284 entries:
> >GNU_RELRO      0x1d14730 0x0000000002314730 0x0000000002314730 0x0058d0 0x0058d0 R   0x1
> >PIE cc1plus:
> >Relocation section '.rela.dyn' at offset 0x187d90 contains 75803 entries:
> >Relocation section '.rela.plt' at offset 0x344018 contains 230 entries:
> >GNU_RELRO      0x1e18cf0 0x0000000002018cf0 0x0000000002018cf0 0x10e310 0x10e310 R   0x1
> >
> >That means e.g. on the startup of each cc1plus process, that means 1MB extra
> >COW wastage (executable has 24KB of pages written and then made
> >non-writable, while PIE over 1MB).
> 
> Odd.  Did you test with copy relocations enabled?

No, because you need GCC 5 for that (ok, have scratch rpms now for that),
and very recent binutils (2.25 we have in F22 is not enough).

	Jakub