linux-kernel - Re: ANNOUNCE: pahole v1.24 (Faster BTF encoding, 64-bit BTF enum entries)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <YwY2mFuJP10dehRx@kernel.org>
Date:   Wed, 24 Aug 2022 11:32:56 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Luna Jernberg <droidbittin@...il.com>
Cc:     dwarves@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alibek Omarov <a1ba.omarov@...il.com>,
        Kornilios Kourtis <kornilios@...valent.com>,
        Kui-Feng Lee <kuifeng@...com>, Yonghong Song <yhs@...com>,
        bpf@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>
Subject: Re: ANNOUNCE: pahole v1.24 (Faster BTF encoding, 64-bit BTF enum
 entries)

Em Wed, Aug 24, 2022 at 03:23:29PM +0200, Luna Jernberg escreveu:
> This package breaks on Arch Linux at the moment and if you are using Arch
> its recommended that you downgrade to 1.23

Breaks in what sense? Can you please provide details?

- Arnaldo
 
> On Tue, Aug 23, 2022 at 1:59 AM Arnaldo Carvalho de Melo <acme@...nel.org>
> wrote:
> 
> > Hi,
> >
> >         The v1.24 release of pahole and its friends is out, with faster
> > BTF generation by parallelizing the encoding part in addition to the
> > previoulsy parallelized DWARF loading, support for 64-bit BTF enumeration
> > entries, signed BTF encoding of 'char', exclude/select DWARF loading
> > based on the language that generated the objects, etc.
> >
> > Main git repo:
> >
> >    git://git.kernel.org/pub/scm/devel/pahole/pahole.git
> >
> > Mirror git repo:
> >
> >    https://github.com/acmel/dwarves.git
> >
> > tarball + gpg signature:
> >
> >    https://fedorapeople.org/~acme/dwarves/dwarves-1.24.tar.xz
> >    https://fedorapeople.org/~acme/dwarves/dwarves-1.24.tar.bz2
> >    https://fedorapeople.org/~acme/dwarves/dwarves-1.24.tar.sign
> >
> >         Thanks a lot to all the contributors and distro packagers, you're
> > on the
> > CC list, I appreciate a lot the work you put into these tools,
> >
> > Best Regards,
> >
> > BTF encoder:
> >
> > - Add support to BTF_KIND_ENUM64 to represent enumeration entries with
> >   more than 32 bits.
> >
> > - Support multithreaded encoding, in addition to DWARF multithreaded
> >   loading, speeding up the process.
> >
> >   Selected just like DWARF multithreaded loading, using the 'pahole -j'
> >   option.
> >
> > - Encode 'char' type as signed.
> >
> > BTF Loader:
> >
> > - Add support to BTF_KIND_ENUM64.
> >
> > pahole:
> >
> > - Introduce --lang and --lang_exclude to specify the language the
> >   DWARF compile units were originated from to use or filter.
> >
> >   Use case is to exclude Rust compile units while aspects of the
> >   DWARF generated for it get sorted out in a way that the kernel
> >   BPF verifier don't refuse loading the BTF generated from them.
> >
> > - Introduce --compile to generate compilable code in a similar fashion to:
> >
> >    bpftool btf dump file vmlinux format c > vmlinux.h
> >
> >   As with 'bpftool', this will notice type shadowing, i.e. multiple types
> >   with the same name and will disambiguate by adding a suffix.
> >
> > - Don't segfault when processing bogus files.
> >

-- 

- Arnaldo