gdb安装pattern、gef

wget https://raw.githubusercontent.com/gdbinit/Gdbinit/master/gdbinit
cp gdbinit ~/.gdbinit
git clone https://github.com/longld/peda.git ~/peda
echo "source ~/peda/peda.py" >> ~/.gdbinit
wget -q -O ~/.gdbinit-gef.py https://github.com/hugsy/gef/raw/master/gef.py
echo source ~/.gdbinit-gef.py >> ~/.gdbinit

计算padding

gdb ret2libc1

pattern create 1000

r

拷贝刚才create的字符运行

报错0x62616164

pattern search 0x62616164

gef的使用

vmmap