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Re: Improving SystemTap ARM Architecture Support
- From: Mark Wielaard <mjw at redhat dot com>
- To: William Cohen <wcohen at redhat dot com>
- Cc: SystemTAP <systemtap at sources dot redhat dot com>
- Date: Wed, 20 Jul 2011 10:35:04 +0200
- Subject: Re: Improving SystemTap ARM Architecture Support
- References: <4E25FBBB.20507@redhat.com>
On Tue, 2011-07-19 at 17:48 -0400, William Cohen wrote:
> Reviewing early test results and the code the following is an
> incomplete list of improvements:
>
> -created aux_syscalls.stp (FIXED)
> "make installcheck" uses debuginfo smoke test
> needs _arch_ptrace_argstr(), aux_syscalls.stp
> -map arm variants (armv7l and armv5tel) to arm (PR4186)
> -provide tapset/arm/registers.stp
> -map register name to/from sruct
> -functions for nd probe argument access
> -add any arm specific syscalls in tapset/arm/syscalls.stp
> -provide high-resolution timer for gettimeofday_ns()
> -this may be complicated by the variety of arm high-res timer mechanisms
For sdt probes one also needs a fixed binutils with the following fix in
it: http://sourceware.org/ml/binutils/2011-07/msg00118.html
Fedora already has source packages, but I don't know if they have been
build for arm yet:
http://koji.fedoraproject.org/koji/buildinfo?buildID=253553
For user space probing one needs some general kernel cleanups, utrace
and uprobes fixes as described in this thread:
https://www.redhat.com/archives/utrace-devel/2011-April/msg00005.html
Cheers,
Mark