dwarf debug information support for ELF targets in the assembler

[Ramana]

Hi,

For an ELF target, while debugging the hand written assembly code, I
couldn't see the file local & global symbols defined in the assembly
files in the debugger symbols list. But then I realized that there is
no debug information in the final executable file for those symbols.

Is it possible to specify (define) and/or generate dwarf debug
information for the hand written assembly code from the assembler?

Are there any existing mechanisms (assembler directives etc) to enable
this support for ELF targets? If yes, any reference port available in
the binutils mainline?

How difficult would it be if the support has to be enabled from the scratch?

Thanks,
Ram