Ventoy/DMPATCH/readme.txt

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1. install ubuntu 22.04 5.15.0-25
2. apt-get install build-essential flex libncurses-dev linux-headers-generic linux-source libssl-dev bison yacc vim libelf-dev ...... and so on
3. cp /lib/modules/5.15.0-25-generic/build/Module.symvers ./
4. /boot/config-5.15.0-25-generic as .config make oldconfig
5. make menuconfig
1. close CONFIG_STACKPROTECTOR
2. close CONFIG_RETPOLINE
3. close CONFIG_UBSAN_BOUNDS
4. close CONFIG_UBSAN_ENUM
6. modify ./scripts/mod/modpost.c
1. skip add_srcversion (just return)
2. force add_retpoline (#ifdef --> #ifndef)
3. force add_intree_flag
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