_cpp_line_note structure in front end

[Nikola Ikonic]

Hello all,

Could anybody please answer me on one question which is related to
_cpp_line_note structure (GCC front end)?

 I am currently working on modifying FE to "swallow" piece of code
similar to this one:

_Asm void DoSomething(some_parameters) {
        mov r1, r2
        mov r2, r3
        ... and similar assembler code
}

The idea is to just take assembler body and parse it as there was
asm("") statement.

I've managed to lex/parse whole this. However, when FE lexes assembler
body of this function, my code fails starting from here:

skipped_white:
  if (buffer->cur >= buffer->notes[buffer->cur_note].pos
      && !pfile->overlaid_buffer)
    {
      _cpp_process_line_notes (pfile, false);
      result->src_loc = pfile->line_table->highest_line;
    }

It goes into _cpp_process_line_notes and then into abort()

Above quoted code is located in _cpp_lex_direct() in lex.c file.

In short, (buffer->cur>= buffer->notes[buffer->cur_note].pos) is true.
I understand that I need to reposition
pos field of _cpp_line_note structure, but I don't know where to
position it. At the end of assembler body?
At the closing parenthesis of DoSomething() function? Where should it
go? What is the purpose of _cpp_line_note structure
and this field at all?

Any suggestion/help/advice would be much appreciated.

Thanks in advance!

Best regards,
                Nikola