2010/3/8 Paweł Sikora <pl...@agmk.net>: > hi, > > during development a cross platform appliacation on x86 workstation > i've enabled an alignemnt checking [1] to catch possible erroneous > code before it appears on client's sparc/arm cpu with sigbus ;) > > it works pretty fine and catches alignment violations but Jakub Jelinek > had told me (on glibc bugzilla) that gcc on x86 can still dereference > an unaligned pointer (except for vector insns). > i suppose it means that gcc can emit e.g. movl for access a short int > (or maybe others scenarios) in some cases and violates cpu alignment rules. > > so, is it possible to instruct gcc-x86 to always use suitable loads/stores > like on sparc/arm?
Only by re-building it and setting STRICT_ALIGNMENT. Richard. > [1] "AC" bit - http://en.wikipedia.org/wiki/FLAGS_register_(computing) > > BR, > Pawel. >
