tech-kern archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: status of Linux ptrace on amd64?

In article <20141201172756.GA29051@neva>,
Alexander Nasonov  <> wrote:
>While trying to make some Linux instrumentation tool work on -current
>amd64 I noticed that ptrace support in compat_linux and compat_linux32
>have some notable differences and compat_linux32 has a better support.
>For instance, I can debug 32bit Linux binaries with NetBSD's gdb but
>any attempt to set a breakpoint on 64bit Linux results in SIGTRAP.
>Neither compat_linux32 nor compat_linux work for that particular tool
>because they don't support LIUNX_PEEKUSER.
>So, I wonder how much work it is to improve ptrace in compat_linux and

Should not be that hard, but what is that tool reading from PEEKUSER?


Home | Main Index | Thread Index | Old Index