elf_getshdr(3elf)

elf_getshdr: elf32_getshdr, elf64_getshdr -- retrieve class-dependent section header

Synopsis

   cc [flag . . . ] file . . . -lelf [library] . . .
   
   #include <libelf.h>
   

   Elf32_Shdr elf32_getshdr(Elf_Scn scn);
   

   Elf64_Shdr elf64_getshdr(Elf elf);

Description

For a 32-bit class file, elf32_getshdr returns a pointer to a section header for the section descriptor scn. Otherwise, the file is not a 32-bit class file, scn was null, or an error occurred; elf32_getshdr then returns NULL.

The header includes the following members:



   	Elf32_Word	sh_name;
   	Elf32_Word	sh_type;
   	Elf32_Word	sh_flags;
   	Elf32_Addr	sh_addr;
   	Elf32_Off	sh_offset;
   	Elf32_Word	sh_size;
   	Elf32_Word	sh_link;
   	Elf32_Word	sh_info;
   	Elf32_Word	sh_addralign;
   	Elf32_Word	sh_entsize;

elf64_getshdr provides the same functionality for 64-bit class files. The header includes the following members:



   	Elf64_Word	sh_name;
   	Elf64_Word	sh_type;
   	Elf64_Word	sh_flags;
   	Elf64_Addr	sh_addr;
   	Elf64_Off	sh_offset;
   	Elf64_Xword	sh_size;
   	Elf64_Word	sh_link;
   	Elf64_Word	sh_info;
   	Elf64_Xword	sh_addralign;
   	Elf64_Xword	sh_entsize;

If the program is building a new file, it is responsible for creating the file's ELF header before creating sections.

References

Intro(3elf), elf_flag(3elf), elf_getscn(3elf), elf_strptr(3elf)