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Re: AIX DWARF debugging sections
- From: Doug Evans <dje at google dot com>
- To: David Edelsohn <dje dot gcc at gmail dot com>
- Cc: Joel Brobecker <brobecker at adacore dot com>, Tristan Gingold <gingold at adacore dot com>, GDB Patches <gdb-patches at sourceware dot org>
- Date: Tue, 6 Oct 2015 12:59:18 -0700
- Subject: Re: AIX DWARF debugging sections
- Authentication-results: sourceware.org; auth=none
- References: <CAGWvnynk4jNchyUNitvTwD1Tq5t4geJvNTg1ALZsMdRYQx6Etg at mail dot gmail dot com> <E9A58816-DE48-4BD2-84D9-90C2D3723D5F at adacore dot com> <20151002213227 dot GA3602 at adacore dot com> <CAGWvnyk5YtqV=kjDa=MVJup7wdt2s=BdADAVAvg+D9rp9ihxfA at mail dot gmail dot com> <CADPb22RhyhWrxLu2vy-TOp7ua97BWBJ6Loa9puoSFiYZq82NBg at mail dot gmail dot com> <20151006165157 dot GA3341 at adacore dot com> <CAGWvnykS9J5cHfbDg4swVhXZdJ+Lzk7JQmikbPrXh2E4p-xshg at mail dot gmail dot com>
On Tue, Oct 6, 2015 at 11:24 AM, David Edelsohn <dje.gcc@gmail.com> wrote:
> On Tue, Oct 6, 2015 at 12:51 PM, Joel Brobecker <brobecker@adacore.com> wrote:
>>> > Because the AIX section does not use the standard name, I am unsure
>>> > which it represents. The documentation only states "dwmac", which
>>> > could expand to either name.
>>> >
>>> > Thanks, David
>>>
>>> Yeah, I think we need to figure out which one it is.
>>
>> That's what I have been trying to do, but I don't see any evidence
>> that GCC emits it, or that binutils handles it. So the answer must
>> lie somewhere on the system side. David?
>
> The official answer from IBM XLC is the section is for both
> .debug_macinfo and .debug_macro
>
> For DWARF4 and below, the dwmac section corresponds to .debug_macinfo.
> For DWARF5 and above, the dwmac section corresponds to .debug_macro.
>
> XLC currently does not generate any macro debugging information for DWARF4.
Huh.
Let's make sure this is documented in the code.