[Nasm-bugs] [Bug 3392325] Bad debug info generation

[no-reply at bugzilla-nasm.gorcunov.org]

http://bugzilla.nasm.us/show_bug.cgi?id=3392325

Hilmar <hilmar.ackermann at googlemail.com> changed:

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                 CC|                            |hilmar.ackermann at googlemail
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--- Comment #7 from Hilmar <hilmar.ackermann at googlemail.com> ---
Hi,

I needed the .debug_line section in one of my projects too, so I wrote an own
dwarf-decoder and I discovered the same problem. I see the bug here (for the
mentioned example) at the side of NASM: In the dwarf header is set: version=3.
In the official dwarf-specification of version 3
(http://dwarfstd.org/doc/Dwarf3.pdf) I read (on page 101):

"DW_LNS_advance_line (opcode 3 - standard opcode):
The DW_LNS_advance_line opcode takes a single signed LEB128 operand and adds
that
value to the line register of the state machine."

There is no statement, that the row is appended after that (in contrast to a
special opcode as example). A simple DW_LNS_copy (standard opcode 1, no
operands) after DW_LNS_advance_line should fix the problem.

Regards,
Hilmar

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