On Sun, 1 May 2011, Patrick Dupre wrote: > It is a perl application calling my own c routines. > I made tons of them but here I get: > > Can't load > '/home/pdupre/perl_lib/i386-linux-thread-multi/auto/Absor_satur/Absor_satur.so' > > for module Absor_satur: > /home/pdupre/perl_lib/i386-linux-thread-multi/auto/Absor_satur/Absor_satur.so: > > cannot restore segment prot after reloc: Permission denied at > /usr/lib/perl5/DynaLoader.pm line 200. > at ./Profile.pl line 22
It looks like you might have run afoul of an anti-stack-smashing mechanism. One idea is to mark some parts of memory non-executable. That limits the places to where evil folks can do a pseudo-return. Another idea is to rearrange the places where shared objects are stored. This limits the information avaiable to an evil-doer. An unrelocateable shared object sometimes gets evicted. > I do not know how to debug this ! >>> I wish to link several .o files to make only one .o file not executable >>> (it will relinked later). I would like to first make a prelinked file >>> easier to then link >>> them to the excutable file (ie. with a main). >> >> ld -r can do that, but are you sure you don't just want to >> stick all the .o files in an archive with ar and link with >> that static library later? I've read the linking with -r is *not* the same as just "concatenating", but I'm not sure what the difference is. You can make an archive.a and use -whole when listing it for inclusion. -- Michael henne...@web.cs.ndsu.nodak.edu "Pessimist: The glass is half empty. Optimist: The glass is half full. Engineer: The glass is twice as big as it needs to be." -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
