Quelles sections sont requises pour un exécutable ELF utilisable?

Question

Je crée un fichier exécutable ELF et j'ai besoin de savoir quelles sections sont requises par le système d'exploitation afin de le charger et de l'exécuter.

Détails:

OS:               Ubuntu 10.04 (64-bit)
Kernel version:   2.6.32-24
Architecture:     i386

Je me rends compte que ce qui suit serait probablement nécessaire:

• .texte
• .Symtab
• .rel.Text

Y en a-t-il d'autres?

Answer 1

"A Whirlwind Tutorial on Creating Really Teensy ELF Executables for Linux " has information on how to (ab)use the various ELF sections to make an executable as small as possible. It also contains a link to the ELF specification if you need more information. (It's also a fairly entertaining read.) Maybe it will tell you what you need to know?

Answer 2

I decided to try systematically stripping sections from an ELF file generated by GCC.

I was able to remove many of the sections, but these could not be removed and have the executable still execute without a segmentation fault:

.dynsym
.dynstr
.gnu.version_r
.rel.plt
.init
.plt
.text
.fini
.ctors
.dtors
.dynamic
.got.plt
.data
.strtab