Warning!! The problem is not in busybox but in the uClibc. When you call the readdir routine the routine alloc a buffer up to the size of file system block (up 64kb for nfs mounted directory). In the __getdents (int fd, char *buf, size_t nbytes) routine, a temporary buffer of that size is allocated on stack and get a stack overflow
-----Messaggio originale----- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Per conto di Greg Ungerer Inviato: giovedì 26 giugno 2008 8.54 A: uClinux development list Oggetto: Re: [uClinux-dev] Problems with 2GB FAT16 SD/CF cards - resolved Hi Wolfgang, Wolfgang Mües wrote: > DSLINUX (www.dslinux.org) is using mostly SD cards for file system > storage. With the advent of 2 GByte SD cards with FAT16 and 32KByte > clustersize, many user have reported problems (data aborts while > traversing directories). > > I have found that busybox needs more stack space to fix this problem. > This was a hard-to-nail-down error, because with directory traversal > problems, network scripts fail, gdbserver fails, etc. Any chance you can try the newest busybox version in the latest uClinux-dist-test-20080620? According to the comments in its Makefile.flags: # Busybox is a stack-fatty so make sure we increase default size # TODO: use "make stksizes" to find & fix big stack users # (we stole scripts/checkstack.pl from the kernel... thanks guys!) # Reduced from 20k to 16k in 1.9.0. FLTFLAGS += -s 16000 So they have reduced its stack size even further. If this proves to be too small I'll increase before releasing... Regards Greg > --- trunk/user/busybox/Rules.mak 2007-10-25 18:45:33 UTC (rev > 2027) > +++ trunk/user/busybox/Rules.mak 2007-10-26 17:19:23 UTC (rev > 2028) > @@ -47,7 +47,8 @@ > # MAKEFILES = $(TOPDIR).config > endif > > -FLTFLAGS += -s 20000 > +# Note that 20K stack space is too low if we use 2GB SD cards > +FLTFLAGS += -s 30000 > > # What OS are you compiling busybox for? This allows you to include > # OS specific things, syscall overrides, etc. > > > -- ------------------------------------------------------------------------ Greg Ungerer -- Chief Software Dude EMAIL: [EMAIL PROTECTED] Secure Computing Corporation PHONE: +61 7 3435 2888 825 Stanley St, FAX: +61 7 3891 3630 Woolloongabba, QLD, 4102, Australia WEB: http://www.SnapGear.com _______________________________________________ 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 This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately. _______________________________________________ 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
