How to add sections to an Elf file.
Suppose I want to add my own section.
I have a file.
Uh, I want to add this file as a section to an Elf file.
How can I do it?
I can use an obj copy command.
I can add, uh, a section to an Elf file.
So I have this Elf file.
I will say simple elf file, and I don't have I will take the sections of this elf file.
I want to add my own section like this init or plt and all.
So the way we can do this is using obj copy.
So obj copy add section.
What is the name you want to give uh to the section and what information you want to add in this.
And what are the facts.
You want to set the section flags.
So we know each section will have a name and a flags.
Right.
And the name we need to give the same name.
And what all flags you want to give to the section I will give copy from the section.
So first you need to copy will copy from this section all sections and it will add a new section as
well.
Now if I say objdump hyphen s j new section, I will only print the contents of the new section it is
having.
Whatever is in this file is being present here, because this section is not present in the file first
file.
Because we are what we are doing using copy or copying this, all the sections and adding one more section
which is new section.
And we are setting this flags which we can verify using hyphen w s user space dot user space one.
We have this new section added uh and the flags, whatever the type we have given and will be coming
into this particular section, this is not present in the user space.
It is only present in the user space one.
So using obj copy we can add our own sections.