linux-kernel - Re: [PATCH v2] perf docs: Mark the Android document as obsolete

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

Message-ID: <1487da55-24dc-40ef-a6e8-4bf4b153fdc3@arm.com>
Date: Mon, 15 Jul 2024 20:31:49 +0100
From: Leo Yan <leo.yan@....com>
To: Ian Rogers <irogers@...gle.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
 Adrian Hunter <adrian.hunter@...el.com>,
 "Liang, Kan" <kan.liang@...ux.intel.com>,
 Nathan Chancellor <nathan@...nel.org>,
 Nick Desaulniers <ndesaulniers@...gle.com>, Bill Wendling
 <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>,
 James Clark <james.clark@...aro.org>, linux-perf-users@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] perf docs: Mark the Android document as obsolete


Hi Ian,

On 7/15/24 18:17, Ian Rogers wrote:
> On Mon, Jul 15, 2024 at 7:34 AM Leo Yan <leo.yan@....com> wrote:
> [snip]
>> +Android NDK compilation is deprecated and no longer supported.
> 
> I think this is objectively worse than just removing the file. It is
> likely the perf tool can build with clang/LLVM, I do it every day

Just curious, are you using LLVM/clang for cross building (e.g. build
aarch64 target on x86_64 host) or just native building?

Clang/LLVM is a natively cross-compiler [1], I installed Clang-15 in the
offical package on Ubuntu, but I failed to do cross compilation with it:

   make ARCH=arm64 LLVM=-15 VF=1 DEBUG=1 -C tools/perf

> and the special case for Android is likely more about the libc (aka
> bionic) which gradually over time has been becoming more full fat -
> perhaps we need to carry somethings in tools/include for missing
> definitions, but we build with musl and that's a PITA in this regard,
> we've also been reducing the tools/include dependencies for perf trace
> beauty support. We don't use ifuncs in the perf tool (Android's
> linker/loader historically hasn't supported these) and the weak symbol
> games should be okay and something I aspire to make less in the perf
> tool over time. As Android uses Linux then it should work and should
> be supported.

Let us drop this patch.

Thanks,
Leo

[1] https://clang.llvm.org/docs/CrossCompilation.html