Hi Raghavendra, Thanks for your reply, but `sudo` doesn't solve the problem :( All the best! Freeman Zhang -------- Original Message -------- > On Monday 01 December 2014 03:26 PM, Freeman Zhang wrote: >> Hi list, >> >> I've been trying to setup a debug environment for linux >> kernel(v3.4,Android,ARM) with kgdb. It worked fine untill I tried to use >> it to debug a module. Under the instruction from LDD, I add module debug >> info in gdb with command: >> >> add-symbol-file test-module.ko address >> >> LDD uses `cat /sys/module/test-module/sections/.text` to get the address >> where the module has been loaded. However, I got: >> >> 0x00000000 > Try reading the file as a root. > $ sudo cat /sys/module/test-module/sections/.text >> >> When I use `lsmod`, I got: >> >> test-module 15278 0 - Live 0x00000000 (O) >> >> Why nothing but 0x00000000 ?? >> >> So I have to do some research in kernel/module.c, and find out that >> struct module -> module_core = 0xbf000000. But when I try these in gdb: >> >> add-symbol-file test-module.ko 0xbf000000 >> break one_of_my_function >> >> I got: >> >> Cannot access memory at address 0xbf002350 >> >> :( >> Could somebody help? >> >> >> All the best! >> Freeman Zhang >> >> >> >> >> >> >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies@xxxxxxxxxxxxxxxxx >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > ------------------------------------------------------------------------------------------------------------------------------- > > [ C-DAC is on Social-Media too. Kindly follow us at: > Facebook: https://www.facebook.com/CDACINDIA & Twitter: @cdacindia ] > > This e-mail is for the sole use of the intended recipient(s) and may > contain confidential and privileged information. If you are not the > intended recipient, please contact the sender by reply e-mail and destroy > all copies and the original message. Any unauthorized review, use, > disclosure, dissemination, forwarding, printing or copying of this email > is strictly prohibited and appropriate legal action will be taken. > ------------------------------------------------------------------------------------------------------------------------------- > > > > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
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