On Tue, 2019-06-25 at 05:22 +0000, Sasha Da Rocha Pinheiro wrote: > Oh, of course, that might be it. > > Do you know if when it's open with write permission, changes will be > mapped back to the file? That depends on whether it is opened with mmap MAP_PRIVATE (ELF_C_READ_MMAP_PRIVATE,) or not. Cheers, Mark