Re: [PATCH v2 3/4] perf augmented_raw_syscalls: Support arm64 raw syscalls

From: Arnaldo Carvalho de Melo
Date: Thu Jun 06 2019 - 09:50:37 EST

Em Thu, Jun 06, 2019 at 10:38:38AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Jun 06, 2019 at 05:48:44PM +0800, Leo Yan escreveu:
> > This patch adds support for arm64 raw syscall numbers so that we can use
> > it on arm64 platform.
> >
> > After applied this patch, we need to specify macro -D__aarch64__ or
> > -D__x86_64__ in compilation option so Clang can use the corresponding
> > syscall numbers for arm64 or x86_64 respectively, other architectures
> > will report failure when compilation.
> So, please check what I have in my perf/core branch, I've completely
> removed arch specific stuff from augmented_raw_syscalls.c.
> What is done now is use a map to specify what to copy, that same map
> that is used to state which syscalls should be traced.
> It uses that tools/perf/arch/arm64/entry/syscalls/mksyscalltbl to figure
> out the mapping of syscall names to ids, just like is done for x86_64
> and other arches, falling back to audit-libs when that syscalltbl thing
> is not present.

Also added:

Fixes: ac96287cae08 ("perf trace: Allow specifying a set of events to add in perfconfig")

For the stable@xxxxxxxxxx folks to automagically pick this.

- Arnaldo