Re: [patch] ptrace.2: Document PTRACE_SET_SYSCALL

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Hello Joseph,

On Mon, 3 Sep 2018 at 19:26, Joseph C. Sible <josephcsible@xxxxxxxxx> wrote:
>
> Signed-off-by: Joseph C. Sible <josephcsible@xxxxxxxxx>

Thanks. Patch (finally) applied.

Cheers,

Michael

> ---
>  man2/ptrace.2 | 23 ++++++++++++++++-------
>  1 file changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/man2/ptrace.2 b/man2/ptrace.2
> index aea63d2..69699cc 100644
> --- a/man2/ptrace.2
> +++ b/man2/ptrace.2
> @@ -51,13 +51,6 @@
>  .\"    ARM
>  .\"    Linux 2.6.12
>  .\"
> -.\" PTRACE_SET_SYSCALL
> -.\"    ARM and ARM64
> -.\"    Linux 2.6.16
> -.\"    commit 3f471126ee53feb5e9b210ea2f525ed3bb9b7a7f
> -.\"    Author: Nicolas Pitre <nico@xxxxxxx>
> -.\"    Date:   Sat Jan 14 19:30:04 2006 +0000
> -.\"
>  .\" PTRACE_GETCRUNCHREGS
>  .\" PTRACE_SETCRUNCHREGS
>  .\"    ARM
> @@ -735,6 +728,22 @@ argument is treated as for
>  .RI ( addr
>  is ignored.)
>  .TP
> +.BR PTRACE_SET_SYSCALL " (since Linux 2.6.16)"
> +.\" commit 3f471126ee53feb5e9b210ea2f525ed3bb9b7a7f
> +When in syscall-enter-stop, change the number of the syscall about to
> +be executed to the number specified in the
> +.I data
> +argument. The
> +.I addr
> +argument is ignored. This request is currently
> +.\" As of 4.19-rc2
> +supported only on arm (and arm64, though only for backwards compatibility),
> +.\" commit 27aa55c5e5123fa8b8ad0156559d34d7edff58ca
> +but most other architectures have other means of accomplishing this
> +(usually by changing the register that the userland code passed the
> +syscall number in).
> +.\" see change_syscall in tools/testing/selftests/seccomp/seccomp_bpf.c
> +.TP
>  .BR PTRACE_SYSEMU ", " PTRACE_SYSEMU_SINGLESTEP " (since Linux 2.6.14)"
>  For
>  .BR PTRACE_SYSEMU ,
> --
> 2.7.4



-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/



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