From: Pedro Alves <palves@redhat.com>
To: Nick Alcock <nick.alcock@oracle.com>
Cc: Joseph Myers <joseph@codesourcery.com>, binutils@sourceware.org
Subject: Re: [PATCH 00/19] libctf, and CTF support for objdump and readelf
Date: Fri, 24 May 2019 16:19:00 -0000 [thread overview]
Message-ID: <2ee54d46-0657-6601-ca69-e2aa447085f4@redhat.com> (raw)
In-Reply-To: <87o93rbzz8.fsf@esperi.org.uk>
On 5/24/19 5:04 PM, Nick Alcock wrote:
> On 24 May 2019, Pedro Alves spake thusly:
>> Even if you only want to support CTF on ELF containers, a cross
>> binutils build hosted on e.g., Windows, targeting an ELF port, should
>> still be able to use the CTF. That's why it is important to not rely
>> on host headers for ELF definitions. It wasn't clear to me from
>> your remarks above whether the cross use case is considered?
>
> My v2 posting (already out) and v3 (to be posted today, with a
> bfdization layer that actually works and a bunch of interface changes to
> make it more useful, and an example use in objdump) appear in my testing
> to work on mingw, at least. I think that's a non-ELF-capable host.
Yes, mingw/Windows uses COFF/PE, not ELF.
>
> Avoiding relying on host ELF headers is also important because the ELF
> header I was unthinkingly relying on isn't portable outside glibc on
> Linux and perhaps Solaris, and that's definitely not portable enough.
>
> (We do still *need* a few lines of stuff from ELF headers, because the
> low-level symbol lookup parts of libctf cannot rely on having a bfd
> available, so we have to do symbol walkiing by hand -- but we don't need
> the host to provide those few lines, and we do use BFD to get section
> content etc when possible now.)
Awesome. Sorry, I'm way behind on the lists.
If everything works in a cross endianness setting too (e.g., big endian
host x little endian target) then you're golden. :-)
Thanks,
Pedro Alves
next prev parent reply other threads:[~2019-05-24 16:19 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 22:57 Nick Alcock
2019-04-30 22:57 ` CTF format overview Nick Alcock
2019-04-30 22:57 ` [PATCH 08/19] libctf: creation functions Nick Alcock
2019-04-30 22:57 ` [PATCH 19/19] binutils: CTF support for objdump and readelf Nick Alcock
2019-04-30 22:57 ` [PATCH 09/19] libctf: opening Nick Alcock
2019-04-30 22:57 ` [PATCH 06/19] libctf: hashing Nick Alcock
2019-05-02 16:16 ` Nick Clifton
2019-05-03 19:33 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 10/19] libctf: ELF file opening Nick Alcock
2019-04-30 22:57 ` [PATCH 02/19] include: new header ctf-api.h Nick Alcock
2019-05-02 15:07 ` Nick Clifton
2019-05-03 11:23 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 15/19] libctf: mmappable archives Nick Alcock
2019-04-30 22:57 ` [PATCH 05/19] libctf: error handling Nick Alcock
2019-05-02 16:10 ` Nick Clifton
2019-05-03 19:31 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 13/19] libctf: type copying Nick Alcock
2019-04-30 22:57 ` [PATCH 01/19] include: new header ctf.h: file format description Nick Alcock
2019-05-01 16:57 ` Nick Clifton
2019-05-01 21:29 ` Jim Wilson
2019-05-03 11:15 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 14/19] libctf: library version enforcement Nick Alcock
2019-04-30 22:57 ` [PATCH 12/19] libctf: lookups by name and symbol Nick Alcock
2019-04-30 22:57 ` [PATCH 03/19] libctf: lowest-level memory allocation and debug-dumping wrappers Nick Alcock
2019-05-02 15:29 ` Nick Clifton
2019-05-03 19:12 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 04/19] libctf: low-level list manipulation and helper utilities Nick Alcock
2019-05-02 16:04 ` Nick Clifton
2019-05-03 19:25 ` Nick Alcock
2019-04-30 22:57 ` [PATCH 11/19] libctf: core type lookup Nick Alcock
2019-04-30 22:58 ` [PATCH 18/19] libctf: build system Nick Alcock
2019-05-01 0:13 ` [PATCH 17/19] libctf: debug dumping Nick Alcock
2019-05-01 0:19 ` [PATCH 16/19] libctf: labels Nick Alcock
2019-05-01 1:57 ` [PATCH 07/19] libctf: implementation definitions related to file creation Nick Alcock
2019-05-01 16:02 ` [PATCH 00/19] libctf, and CTF support for objdump and readelf Nick Clifton
2019-05-01 16:16 ` Jose E. Marchesi
2019-05-03 10:47 ` Nick Alcock
2019-05-02 15:22 ` Joseph Myers
2019-05-03 12:33 ` Nick Clifton
2019-05-06 16:40 ` Nick Alcock
2019-05-08 14:34 ` Michael Matz
2019-05-08 16:01 ` Nick Clifton
2019-05-08 16:20 ` Nick Alcock
2019-05-03 14:23 ` Nick Alcock
[not found] ` <alpine.DEB.2.21.1905072117440.19308@digraph.polyomino.org.uk>
2019-05-08 11:39 ` Nick Alcock
2019-05-24 8:57 ` Pedro Alves
2019-05-24 16:05 ` Nick Alcock
2019-05-24 16:19 ` Pedro Alves [this message]
2019-05-24 20:09 ` Nick Alcock
2019-05-03 16:19 ` Florian Weimer
2019-05-03 19:45 ` Nick Alcock
2019-05-06 12:07 ` Florian Weimer
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