The add-symbol-file command comment in the manual is confusing

[Eli Zaretskii]

> Date: Fri, 06 Apr 2001 14:33:16 -0400
> From: Andrew Cagney <ac131313@cygnus.com>
> 
> This sounds like our first (?) Doco bug :-)

If someone tells how to correct that, I'm willing to do that.

 As for your questions,
> others are definitly more qualified to comment.
> 
>	Andrew
> 
> Stephen Smith wrote:
> > 
> > The add-symbol-file symbol file command has the following prose in the manual:
> > 
> >      add-symbol-file filename address [ -readnow ] [ -mapped ]
> >      The add-symbol-file command reads additional symbol table information from the file filename. You would use this
> > command when filename has been dynamically
> >      loaded (by some other means) into the program that is running. address should be the memory address at which the
> > file has been loaded; GDB cannot figure this out for itself.
> >      You can specify address as an expression. The symbol table of the file filename is added to the symbol table
> > originally read with the symbol-file command. You can use
> >      the add-symbol-file command any number of times; the new symbol data thus read keeps adding to the old. To discard
> > all old symbol data instead, use the
> >      symbol-file command. add-symbol-file does not repeat if you press RET after using it. You can use the `-mapped' and
> > `-readnow' options just as with the
> >      symbol-file command, to change how GDB manages the symbol table information for filename.
> > 
> > Several questions
> > 1)  What is the difference between useing and not using the -mapped command?   Maybe I should ask first what is the use
> > of the mapped switch?
> > 
> > 2)  The quote says that "You can specify address as an expression".  How would you do that?  And just a curriosity, how
> > would you figure out the address to use?
>