[Dwarf-Discuss] Help on _start and start function

[Jonas Maebe]

On 26 Jul 2009, at 09:35, Arnab Ganguly wrote:

> One small help is requested. How do I get the _start and start  
> function
> information from the DWARF file in Mac OSX.
>
> I developed a address to symbol tool . On basis of the program  
> counters it
> gives the file name, line number and the function name, It works  
> perfectly
> but  when the addresses are for _start or start functions I am not  
> able to
> get the function name, which I get it in the Apple crash report when I
> compare.How can this be achieved by parsing the DWARF file ?

There is no DWARF (or other debug) information for those functions.  
Apple's crashreporter falls back to looking up the object's symbol  
table information if no debug information is available.

See, a.o., "man Mach-O" and http://developer.apple.com/documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html


Jonas