`STT_NOTYPE`

Then come the most important symbols:

Num:    Value          Size Type    Bind   Vis      Ndx Name
  4: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT    1 hello_world
  5: 000000000000000d     0 NOTYPE  LOCAL  DEFAULT  ABS hello_world_len
  6: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT    2 _start

hello_world string is in the .data section (index 1). It's value is 0: it points to the first byte of that section.

_start is marked with GLOBAL visibility since we wrote:

global _start

in NASM. This is necessary since it must be seen as the entry point. Unlike in C, by default NASM labels are local.

Table of contents 201 1
- 1. SHN_ABS STT_NOTYPE 107

 Ancestors (12)

.symtab
Sections
ELF Hello World Tutorial
Executable and Linkable Format
Executable file format
Systems programming
Software
Computer
Information technology
Area of technology
Technology
 Home