On 06-08-12 22:48 Patrick Simmons wrote: > Thanks for your help, Ulrich. > > Would an unaligned memory access look like just an array indexing? > Perhaps something like this? (version r83) > > zd1205.c:108:#define getSeq(pWlanHdr) > (((u16)pWlanHdr->SeqCtrl[1] << 4) + (u16)((pWlanHdr->SeqCtrl[0] & 0xF0) > >> 4))
No SeqCtrl are byte arrays, you can't have an unaligned read on bytes. Look for two-byte or four-byte types! > If not, how can I tell whether something is aligned or not? I read the > section on unaligned access in the kernel drivers guide you pointed too, b I told you that is difficult. > As far as the trap, the dmesg log mentions this: > > Unsupported unaligned load/store trap for kernel at <0000000000573bec>. > \|/ ____ \|/ > "@'/ .. \`@" > /_| \__/ |_\ > \__U_/ > > I'm guessing that I should do something with <0000000000573bec>, but I > don't know where to start. Is that the address of the invalid code in > the module or the address of the trap handler which got called? In any > case, how do I use this number to determine what function the problem is in? This is the address of the invalid code. It's a pity that they don't write out a normal kernel oops, which would give us much more information. Look into /proc/modules and /boot/System.map* to check where it is. If it is in zd1211 you can uses nm -n -g zd1211.ko to find the right function. It should be simpler if you are using gdb. The Linux Device Driver book describes it in chapter 4 on pages 99ff. I have reviewed the rx path of zd1211rw. The probable alignment problems I mentioned appear to be handled. -- Uli Kunitz ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Zd1211-devs mailing list - http://zd1211.ath.cx/ Unsubscribe: https://lists.sourceforge.net/lists/listinfo/zd1211-devs
