linux-kernel - Re: [PATCH v1 0/4] perf e

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] [day] [month] [year] [list]

Message-ID: <aXfT5XlRkURVMwDB@x1>
Date: Mon, 26 Jan 2026 17:51:49 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	James Clark <james.clark@...aro.org>, Guo Ren <guoren@...nel.org>,
	Tianyou Li <tianyou.li@...el.com>,
	Athira Rajeev <atrajeev@...ux.ibm.com>,
	Stephen Brennan <stephen.s.brennan@...cle.com>,
	Aditya Bodkhe <aditya.b1@...ux.ibm.com>,
	Chun-Tse Shao <ctshao@...gle.com>,
	Swapnil Sapkal <swapnil.sapkal@....com>,
	Howard Chu <howardchu95@...il.com>,
	Sergei Trofimovich <slyich@...il.com>,
	Shimin Guo <shimin.guo@...dio.com>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-csky@...r.kernel.org
Subject: Re: [PATCH v1 0/4] perf e_flags support for CSKY

On Fri, Jan 23, 2026 at 02:22:05PM -0800, Ian Rogers wrote:
> The ELF machine type for CSKY is insufficent to describe the perf
> registers, the e_flags from the ELF header is also required. Expand
> the thread__e_machine and associated APIs to optionally fill in an
> e_flags output field. For uses in `perf trace` the e_flags doesn't
> matter and the e_flags needn't be computed. For `perf annotate` the
> e_flags are computed and passed around, however, this is optimized so
> the e_flags are only read for EM_CSKY. Call chain unwinding needs to
> know about perf registers during recording and in the unwinding logic,
> this is similarly wired up with the e_flags.
> 
> Ian Rogers (4):
>   perf dso: Factor out e_machine reading for use in thread
>   perf thread: Add optional e_flags output argument to thread__e_machine
>   perf perf_regs: Accurately compute register names for CSKY
>   perf unwind-libdw: Wire up e_flags for CSKY

Thanks, applied to perf-tools-next,

- Arnaldo