linux系统oops panic 奔溃问题调查objdump工具使用demo脚本

 

用法：

./objdump-function.sh vmlinux symbol

symbol指定要找的函数名

vmlinux=$1 
symbol=$2 

#source /opt/poky/1.6.1/environment-setup-cortexa15hf-vfp-neon-poky-linux-gnueabi

if [ -z "$vmlinux" ]; then 
    echo "usage : $0 vmlinux symbol"
    exit 
fi 
 
startaddress=$(nm -n $vmlinux | grep "\w\s$symbol" | awk '{print "0x"$1;exit}') 
endaddress=$(nm -n $vmlinux | grep -A1 "\w\s$symbol" | awk '{getline; print "0x"$1;exit}') 
  
if [ -z "$symbol" ]; then 
    echo "dump all symbol"
    /opt/gcc-linaro-7.1.1-2017.08-i686_aarch64-linux-gnu/bin/aarch64-linux-gnu-objdump -d $vmlinux 
else 
    echo "start-address: $startaddress, end-address: $endaddress" 
    /opt/gcc-linaro-7.1.1-2017.08-i686_aarch64-linux-gnu/bin/aarch64-linux-gnu-objdump -d $vmlinux --start-address=$startaddress --stop-address=$endaddress > $symbol.h
fi