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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sat, 4 Jul 2020 21:30:50 +0300
From:   Pekka Enberg <>
To:     Guo Ren <>
Cc:     Palmer Dabbelt <>,
        Paul Walmsley <>,
        Anup Patel <>,
        Greentime Hu <>,
        Zong Li <>,
        Patrick Stählin <>,, Atish Patra <>,
        linux-riscv <>,
        Guo Ren <>,
        LKML <>,
Subject: Re: [PATCH V1 0/5] riscv: Add k/uprobe supported

Hi Guo,

On Sat, Jul 4, 2020 at 6:34 AM <> wrote:
> > > There is no single step exception in riscv ISA, so utilize ebreak to
> > > simulate. Some pc related instructions couldn't be executed out of line
> > > and some system/fence instructions couldn't be a trace site at all.
> > > So we give out a reject list and simulate list in decode-insn.c.

On Sat, Jul 4, 2020 at 2:40 PM Pekka Enberg <> wrote:
> > Can you elaborate on what you mean by this? Why would you need a
> > single-step facility for kprobes? Is it for executing the instruction
> > that was replaced with a probe breakpoint?

On Sat, Jul 4, 2020 at 5:55 PM Guo Ren <> wrote:
> It's the single-step exception, not single-step facility!

Aah, right, I didn't read the specification carefully enough. Thanks
for taking the time to clarify this!

FWIW, for the whole series:

Reviewed-by: Pekka Enberg <>

- Pekka

Powered by blists - more mailing lists