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Date:   Mon, 18 Mar 2019 22:02:39 +0300
From:   "Dmitry V. Levin" <>
To:     Paul Moore <>
Cc:     Elvira Khabirova <>,
        Eugene Syromyatnikov <>,
        Andy Lutomirski <>,
        Oleg Nesterov <>,,
Subject: Re: [PATCH v2 00/13] Prepare syscall_get_arch for

On Mon, Mar 18, 2019 at 02:28:27AM +0300, Dmitry V. Levin wrote:
> syscall_get_arch() is required to be implemented on all architectures in order
> to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request:
> syscall_get_arch() is going to be called from ptrace_request() along with
> syscall_get_nr(), syscall_get_arguments(), syscall_get_error(), and
> syscall_get_return_value() functions with a tracee as their argument.
> The primary intent is that the triple (audit_arch, syscall_nr, arg1..arg6)
> should describe what system call is being called and what its arguments are.
> This patchset began as a series called "Prepare for PTRACE_GET_SYSCALL_INFO",
> then I merged it into a series called "ptrace: add PTRACE_GET_SYSCALL_INFO request"
> that also contains ptrace-specific changes.
> The ptrace-specific part, however, needs more attention to workaround problems
> on niche architectures like alpha, while the syscall_get_arch() part is
> straightforward, so I decided to split it out into a separate patchset that
> just prepares syscall_get_arch() for PTRACE_GET_SYSCALL_INFO: it adds
> syscall_get_arch() to those architectures that haven't implemented it yet,
> and then adds "struct task_struct *" argument to syscall_get_arch()
> on all architectures.
> All patches from this patchset have been already reviewed, so it's ready
> to be merged without waiting for the ptrace-specific part.  As it's all
> about syscall_get_arch(), it should probably go via audit tree.
> Notes:
>     v2: rebased to v5.1-rc1, added Acked-by

Apparently, I failed to process the ACK given by Richard Guy Briggs
on January 17th, please also add
Acked-by: Richard Guy Briggs <>
when applying.



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