Hello I need help understanding problems with a driver I'm modifying. When used, it will produce a Kernel panic because of "Kernel access of bad area" and gives register / stack dump. I think its because another driver is giving me bad pointer address's and sizes. However I don't know so I'm trying to track down the address's of the exported globals. I've read that you can use ksymoops to decode the dumps. However, when I run ksymoops I get a warning message about proc/ksyms entry differs from module. Here's the message: mismatch on symbol sizeOfD6Mem, module says c906 5308, /opt/npref/bin/modules/pci_rethdd.o says c906 5ab0. I examined /proc/ksyms and it is indeed located at c906 5308. I did a objdump on the pci_rethdd.o module and. Here's what I found: 000 006c g o .sdata 0000 0004 sizeOfD6Mem pci_rethdd.c defines the variable like this: size_t const sizeOfD6Mem = 0x0400 0000 So how do I interpet these values? Is objdump saying that sizeOfD6Mem is a global (g), which uses 4 bytes (0000 0004) and is located at offset 0000 006c? How do I determine the base address to add to this offset? Shouldn't the sum be the value shown in the ksyms file? Where is ksymoops getting the value c906 5ab0? JD -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
