Hi, the previous discussion didn't really show any hard requirement for MAP_FIXED usage for the elf segments mapping. I have spent some more time studying the code (thanks to Qualys for their insight) and concluded that the current MAP_FIXED usage is rather fragile and not really needed. The first patch replaces it by a hint mmaping and failing rather than silently corrupt an existing memory and the second patch removes MAP_FIXED for the initial segment mapping because this shouldn't be really needed either, I would even call it wrong. Anyway, more details are in the changelog of patches. I will really appreciate any feedback.
This has passed some testing with PIE/PIC binaries running in the loop without any negative side effects detected.
