lkml.org 
[lkml]   [2019]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 00/14] Prepare syscall_get_arch for PTRACE_GET_SYSCALL_INFO
On Sat, Feb 09, 2019 at 01:22:19AM +0300, Dmitry V. Levin wrote:
> On Thu, Jan 17, 2019 at 03:34:44PM -0500, Richard Guy Briggs wrote:
> > On 2019-01-09 15:40, 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.
> >
> > Glad to see syscall_get_arch() added to the remaining arches. As Paul
> > said, it gets us closer to auditing syscalls on those remaining
> > unsupported arches and getting rid of the extra CONFIG_AUDITSYSCALL.
> > A little ironic that Eric (Paris) and I purged task_struct from
> > syscall_get_arch() 5 years ago since everything could use current.
> >
> > > 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.
> >
> > ACK.
> >
> > Thanks Dmitry.
>
> Thanks.
> Please let me know if some action related to this patch series is expected from me.
>
> > > Dmitry V. Levin (14):
> > > Move EM_ARCOMPACT and EM_ARCV2 to uapi/linux/elf-em.h
> > > arc: define syscall_get_arch()
> > > c6x: define syscall_get_arch()
> > > h8300: define syscall_get_arch()
> > > Move EM_HEXAGON to uapi/linux/elf-em.h
> > > hexagon: define syscall_get_arch()
> > > m68k: define syscall_get_arch()
> > > Move EM_NDS32 to uapi/linux/elf-em.h
> > > nds32: define syscall_get_arch()
> > > nios2: define syscall_get_arch()
> > > riscv: define syscall_get_arch()
> > > Move EM_UNICORE to uapi/linux/elf-em.h
> > > unicore32: define syscall_get_arch()
> > > syscall_get_arch: add "struct task_struct *" argument

This is just a gentle ping of the series which is still applicable
to v5.0-rc8 with one exception: "riscv: define syscall_get_arch()"
is no longer needed as riscv already has syscall_get_arch() now.


--
ldv
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2019-02-27 15:13    [W:0.060 / U:16.772 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site