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
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