Re: [avr-gcc-list] avr-objdump behaviour

[E. Weddington]

gouy yann wrote:

> Hi,
>
> my context is:
> I compile several files from the same directory,
> I link them
> and finally, I extract the .lst from the .elf.
>
> then,
> why for some files the C is mixed with the assembly?
> why for others it is not, only the assembly is seen?
>
>  

From the Binutils 2.15 user manual, on objdump
<http://sources.redhat.com/binutils/docs-2.15/binutils/objdump.html#objdump>:

-------------------------------------------------------------------------

|-S|

|--source|
   Display source code intermixed with disassembly, if possible.
   Implies |-d|. 

-------------------------------------------------------------------------

Note the words, "if possible".  When you use objdump, you are getting a 
disassembly from the ELF file, which is a binary format. I'm surprised 
you would even get *any* C source code from it. It's probably getting 
what little C source code it has from debugging information embedded in 
the ELF file. (As a side note, I wonder if you strip the ELF file [using 
avr-strip], if you don't get any C source code from avr-objdump?)

For more information as to why, it would be best to ask the developers 
on the binutils mailing list:
<http://www.gnu.org/software/binutils/>