我步骤
cd /sys/module/hello/sections
cat .text .data .bss // 取得 .text .data .bss address
0xbf000000
0xbf0003d5
0xbf0004e0
// 加入gdb
add-symbol-file ../hello_module/hello.ko 0xbf000000 -s .data 0xbf0003d5 -s .bss 0xbf0004e0
https://gist.github.com/anonymous/f999ebaddcc94749b837 // 程式码跟Makefile
(gdb) b hello_exit
Cannot access memory at address 0xbf00002c // 会出现这样错误
我记得我以前成功过, 请问有人知道原因吗？
谢谢

dmesg有没有错误？

Alternatively, you can use gdb on a running kernel.(read-only; i.e. you cannot change values or set break points.) reference:README under kernel source