https://www.gnu.org/software/binutils/

• nm - Lists symbols from object files.

• objdump - Displays information from object files.

• readelf - Displays information from any ELF format object file.

  apt-get source binutils

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=tree

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=tree;f=binutils;h=e9260b41f3cae51d1a8c542a8e8328d3f39c7c18;hb=HEAD

man readelf

http://linuxcommand.org/man_pages/readelf1.html

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=binutils/readelf.c;h=9cafd7c4fe01212babfd65b806a53d892552f497;hb=HEAD

man objdump

http://linuxcommand.org/man_pages/objdump1.html

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=binutils/objdump.c;h=14f412214c96f7d849d70ae3ba17e283966abc51;hb=HEAD

man nm

http://linuxcommand.org/man_pages/nm1.html

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=binutils/nm.c;h=2a44a846004885f06f288af6c38fa42eddf5a7f2;hb=HEAD