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_cpp_line_note structure in front end
- From: Nikola Ikonic <nikola dot ikonic at gmail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Fri, 5 Feb 2010 21:22:33 +0100
- Subject: _cpp_line_note structure in front end
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