how does gdb extract symbol table information from binary files?

how does gdb extract symbol table information from binary files?

[Rohit Grover]

Hello,

Could someone please help me understand how gdb fishes symbol table 
information when asked to print a struct value? I tried working my way 
down print_command_1(), but didn't succeed.

thanks,
Rohit.

Re: how does gdb extract symbol table information from binary files?

[Ramana Radhakrishnan]

> Hello,
>
> Could someone please help me understand how gdb fishes symbol table
> information when asked to print a struct value? I tried working my way
> down print_command_1(), but didn't succeed.

Or do you mean type information ? The symbol information can minimally be
gleaned from the ELF headers. The type information and the association of
a variable / address with a type would come from the debug info in
whatever form that might be.

cheers
Ramana

----
Ramana Radhakrishnan
GNU Tools
(codito ergo sum) www.codito.com

Re: how does gdb extract symbol table information from binary files?

[Charlls Quarra]

--- Ramana Radhakrishnan
<ramana.radhakrishnan@codito.com> escribió: > 
>
> Or do you mean type information ? The symbol
> information can minimally be
> gleaned from the ELF headers. The type information
> and the association of
> a variable / address with a type would come from the
> debug info in
> whatever form that might be.

 but i assume they want to know how the debugger gets
type/mangled symbol information, so they can use
something similar during runtime, avoiding stuff like
RTTI (maybe a fixed offset from the function address
there is the symbol as a ascii string?)

 cheers



	
	
		
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