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?
--
Florian Weimer / Red Hat Product Security
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