I want to write an ELF file manually. How can I make my elven call standard library c

Question

I want to write an ELF file manually. How can I make my elven call standard library c. I know about the kernel search for the PT_INTERP program header and read "/lib/ld-linux.so.2", and I know about the global offset table (GOT) and the procedure binding table (PLT).

But I don’t know how the ELF file with PT_INTERP phdr, GOT, PLT will be executed and will call the C library. I need to know this in binary format to help me create a handmade ELF.

Answer 1

What happens ::

• ​​ VAS ( );

• ​​ ;

• (DT_NEEDED) shared-objects VAS

  • DT_NEEDED libc, .

• :

  • GOT libc;

  • PLT libc ( .PLT0), GOT;

  • GOT;

  • libc funtion () ;

  • DT_RELA, DT_REL, DT_RELASZ, DT_RELSZ, DT_RELAENT, DT_RELENT, DL_PLTREL, PLTRELSZ, DT_JMPREL;

  • PLT.

• .