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What is debugging information?

Started by jani November 19, 2007
I work on PowerPC based Embedded Systems.  Programming language is C. 
Cross compiler is Diab 4.2b.  FYI, Windriver has purchased Diab.  Along
with the compiler comes a utility called ddump.  This utility has the
following syntax.

ddump [command] file

I invoke this utility as follows:

ddump -D filename.elf
I believe .elf stands for executable linking format.  Anyways, this
command means to dump the DWARF debugging information in each object file.
 I think when this utitliy is run it generates bunch of paths to the source
code.  These source paths are loaded into the debugger.  Then, we type some
command in debugger to load symbols.  Then, somehow source code that
matches the binary image in our target hardware appears in the debugger. 
How does all this work?  What is DWARF?

Thanks,
jani wrote:
> I work on PowerPC based Embedded Systems. Programming language is C. > Cross compiler is Diab 4.2b. FYI, Windriver has purchased Diab. Along > with the compiler comes a utility called ddump. This utility has the > following syntax. > > ddump [command] file > > I invoke this utility as follows: > > ddump -D filename.elf > I believe .elf stands for executable linking format. Anyways, this > command means to dump the DWARF debugging information in each object file. > I think when this utitliy is run it generates bunch of paths to the source > code. These source paths are loaded into the debugger. Then, we type some > command in debugger to load symbols. Then, somehow source code that > matches the binary image in our target hardware appears in the debugger. > How does all this work? What is DWARF? >
Did you try Googling? I got pretty good hits with 'elf' and 'dwarf debug'. -- Tauno Voipio tauno voipio (at) iki fi