On Tue 30 Jun 2009 23:54, Haitao Zhang pondered: > Hi, > > in mmu less system, stack overflow is extremely danger for userland application, > so i just try to take advantage from using GCC stack check options, > BTW: our system is running on a ARM7TDMI, mmuless platform, > and we use GCC 4.3.3, also build userland to use ARM EABI, > > Here are my questions: > 1. in old GCC 3.x series, there is a -mapcs-stack-check, > but once GCC and ARM ABI upgraded to use AAPCS, > seems there is no such option like -maapcs-stack-check. > > 2. tried explicit compile application with -fstack-limit-register=R10, > but seems no binary change with or without this option. > > 3. anybody tried -fstack-check option on ARM or other mmuless system? > will this option help in runtime stack check?
We use stack checking all the time on blackfin (nommu). fstack-limit-symbol=_stack_start check the man page for gcc. This has limited use (doesn't work) on multi-threaded applications, so we created a blackfin specific flag: -mstack-check-l1 , which needs a little kernel support. -Robin _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
