Adding section to ELF file
I know this is an old question but i found a working example that helped me to apply it to my project. (In case anyone stumbles upon this question)
taken from Sourceware Mail Archiv
$ echo 'int main() { puts ("Hello world"); }' | gcc -x c - -c -o hello.o$ echo "this is my special data" >mydata$ objcopy --add-section .mydata=mydata \ --set-section-flags .mydata=noload,readonly hello.o hello2.o$ gcc hello2.o -o hello$ ./helloHello world$ objdump -sj .mydata hello
There's a few (possibly) related answers in this question about ELF file headers. The accepted answer mentioned using objcopy to add sections to an ELF file, and the BSD bintools claims to have a BSD-licensed implementation of objcopy that might suit your needs.
The following links could be useful:
- The tutorial "libelf by Example" has a chapter on creating new ELF objects.
- The elftoolchain project has manual pages describing
libelf's API in detail.