Ventoy/DMPATCH

1. install ubuntu 21.10

2. apt-get install build-essential flex ncurse linux-headers-generic linux-source ...... and so on

3. cp /lib/modules/5.13.0-23-generic/build/Module.symvers ./

4. /boot/config-5.13.0-23-generic as .config   make oldconfig

5. make menuconfig 

    1. close CONFIG_STACKPROTECTOR

    2. close CONFIG_RETPOLINE



6. modify ./scripts/mod/modpost.c

    1. skip add_srcversion (just return)

    2. force add_retpoline (#ifdef --> #ifndef)



7. make modules_prepare LOCALVERSION=-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



8. Append padding at the end of struct module <include/linux/module.h>

struct module {

    enum module_state state;



	/* Member of list of modules */

	struct list_head list;



	/* Unique handle for this module */

	char name[MODULE_NAME_LEN];

    

    ....

    

    char padding[1024];

};



This is because struct module size is different in different kernel versions or with different CONFIG item.





9. make modules M=/home/dmpatch

10. strip --strip-debug /home/dmpatch/dm_patch.ko