What does each column of objdump's Symbol table mean?

Question

SYMBOL TABLE:
0000000000000000  w      *UND*  0000000000000000              __gmon_start__

I've man objdump but there's no such info.

Anyone know what the 5 columns mean?

Answer 1

COLUMN ONE: the symbol's value

COLUMN TWO: a set of characters and spaces indicating the flag bits that are set on the symbol. There are seven groupings which are listed below:

group one: (l,g,,!) local, global, neither, both.

group two: (w,) weak or strong symbol.

group three: (C,) symbol denotes a constructor or an ordinary symbol.

group four: (W,) symbol is warning or normal symbol.

group five: (I,) indirect reference to another symbol or normal symbol.

group six: (d,D,) debugging symbol, dynamic symbol or normal symbol.

group seven: (F,f,O,) symbol is the name of function, file, object or normal symbol.

COLUMN THREE: the section in which the symbol lives, ABS means not associated with a certain section

COLUMN FOUR: the symbol's size or alignment.

COLUMN FIVE: the symbol's name.

If you want additional information try you man page ;-) or the following links: http://manpages.ubuntu.com/manpages/intrepid/man1/objdump.1.html and http://sourceware.org/binutils/docs/binutils/objdump.html