From: Alexey Brodkin <alexey.brodkin@synopsys.com>
To: "luto@amacapital.net" <luto@amacapital.net>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-audit@redhat.com" <linux-audit@redhat.com>,
"vineet.gupta1@synopsys.com" <vineet.gupta1@synopsys.com>,
"eparis@redhat.com" <eparis@redhat.com>,
"ldv@altlinux.org" <ldv@altlinux.org>,
"linux-snps-arc@lists.infradead.org"
<linux-snps-arc@lists.infradead.org>,
"luto@kernel.org" <luto@kernel.org>,
"paul@paul-moore.com" <paul@paul-moore.com>,
"lineprinter@altlinux.org" <lineprinter@altlinux.org>
Subject: Re: [PATCH 06/13] arc: define syscall_get_arch()
Date: Fri, 9 Nov 2018 16:11:21 +0000 [thread overview]
Message-ID: <215d66fd9a197b631973c9ff75943b4c1216b899.camel@synopsys.com> (raw)
In-Reply-To: <C6CF3942-3307-431F-B76C-B550BB48F472@amacapital.net>
Hi Andy,
On Fri, 2018-11-09 at 07:56 -0800, Andy Lutomirski wrote:
> > On Nov 9, 2018, at 7:27 AM, Alexey Brodkin <alexey.brodkin@synopsys.com> wrote:
> >
> > Hi Andy,
> >
> > > On Fri, 2018-11-09 at 07:17 -0800, Andy Lutomirski wrote:
> > > On Fri, Nov 9, 2018 at 6:22 AM Alexey Brodkin
> > > <alexey.brodkin@synopsys.com> wrote:
> > > > Hi Dmitry,
> > > >
> > > > > On Fri, 2018-11-09 at 06:16 +0300, Dmitry V. Levin wrote:
> > > > > syscall_get_arch() is required to be implemented on all architectures
> > > > > that use tracehook_report_syscall_entry() in order to extend
> > > > > the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
> > > > >
> > > > > Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
> > > > > ---
> > > > > arch/arc/include/asm/syscall.h | 6 ++++++
> > > > > include/uapi/linux/audit.h | 1 +
> > > > > 2 files changed, 7 insertions(+)
> > > >
> > > > [snip]
> > > >
> > > > > diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> > > > > index 818ae690ab79..a7149ceb5b98 100644
> > > > > --- a/include/uapi/linux/audit.h
> > > > > +++ b/include/uapi/linux/audit.h
> > > > > @@ -375,6 +375,7 @@ enum {
> > > > >
> > > > > #define AUDIT_ARCH_AARCH64 (EM_AARCH64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> > > > > #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> > > > > +#define AUDIT_ARCH_ARC (EM_ARC)
> > > >
> > > > Similarly here we need to have:
> > > > ---------------------------->8-----------------------------
> > > > +#define AUDIT_ARCH_ARC (EM_ARC|EM_ARCV2)
> > > > ---------------------------->8-----------------------------
> > > >
> > >
> > > Huh? How does the bitwise or of two ELF machine codes make any sense?
> >
> > Oops... I didn't read examples of AUDIT_ARCH_ALPHA above :(
> > Indeed that was stupid.
> >
> > But what would be a proper fix then?
> >
> > Something like that?
> > ---------------------------->8-----------------------------
> > #define AUDIT_ARCH_ARC (EM_ARC)
> > #define AUDIT_ARCH_ARCV2 (EM_ARCV2)
> >
> >
> > static inline int syscall_get_arch(void)
> > {
> > #ifdef __ARC700__
> > return AUDIT_ARCH_ARC;
> > #else
> > return AUDIT_ARCH_ARCV2;
> > #endif
> > }
> > ---------------------------->8-----------------------------
> >
>
> Maybe, but I know basically nothing about ARC. Is the syscall numbering or calling convention different on ARC vs ARCv2?
Syscall numbering should be the same as we use UAPI for both ARCompact (AKA ARCv1)
and ARCv2. As for calling convention I think it indeed differs.
Note ARCompact and ARCv2 ISAs are binary incompatible!
Even though assembly look pretty much the same (sans instructions
available only for either ARCompact or ARCv2) encodings are different so
in that sense these are completely different architectures.
Also I'm wondering what could be other cases for use of syscall_get_arch().
So I'd say it's better to report different values for ARC ISAs.
And given we use the same values as in Binutils IMHO it would be good
to not mix IDs here.
-Alexey
WARNING: multiple messages have this Message-ID (diff)
From: alexey.brodkin@synopsys.com (Alexey Brodkin)
To: linux-snps-arc@lists.infradead.org
Subject: [PATCH 06/13] arc: define syscall_get_arch()
Date: Fri, 9 Nov 2018 16:11:21 +0000 [thread overview]
Message-ID: <215d66fd9a197b631973c9ff75943b4c1216b899.camel@synopsys.com> (raw)
In-Reply-To: <C6CF3942-3307-431F-B76C-B550BB48F472@amacapital.net>
Hi Andy,
On Fri, 2018-11-09@07:56 -0800, Andy Lutomirski wrote:
> > On Nov 9, 2018,@7:27 AM, Alexey Brodkin <alexey.brodkin@synopsys.com> wrote:
> >
> > Hi Andy,
> >
> > > On Fri, 2018-11-09@07:17 -0800, Andy Lutomirski wrote:
> > > On Fri, Nov 9, 2018 at 6:22 AM Alexey Brodkin
> > > <alexey.brodkin@synopsys.com> wrote:
> > > > Hi Dmitry,
> > > >
> > > > > On Fri, 2018-11-09@06:16 +0300, Dmitry V. Levin wrote:
> > > > > syscall_get_arch() is required to be implemented on all architectures
> > > > > that use tracehook_report_syscall_entry() in order to extend
> > > > > the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
> > > > >
> > > > > Signed-off-by: Dmitry V. Levin <ldv at altlinux.org>
> > > > > ---
> > > > > arch/arc/include/asm/syscall.h | 6 ++++++
> > > > > include/uapi/linux/audit.h | 1 +
> > > > > 2 files changed, 7 insertions(+)
> > > >
> > > > [snip]
> > > >
> > > > > diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> > > > > index 818ae690ab79..a7149ceb5b98 100644
> > > > > --- a/include/uapi/linux/audit.h
> > > > > +++ b/include/uapi/linux/audit.h
> > > > > @@ -375,6 +375,7 @@ enum {
> > > > >
> > > > > #define AUDIT_ARCH_AARCH64 (EM_AARCH64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> > > > > #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> > > > > +#define AUDIT_ARCH_ARC (EM_ARC)
> > > >
> > > > Similarly here we need to have:
> > > > ---------------------------->8-----------------------------
> > > > +#define AUDIT_ARCH_ARC (EM_ARC|EM_ARCV2)
> > > > ---------------------------->8-----------------------------
> > > >
> > >
> > > Huh? How does the bitwise or of two ELF machine codes make any sense?
> >
> > Oops... I didn't read examples of AUDIT_ARCH_ALPHA above :(
> > Indeed that was stupid.
> >
> > But what would be a proper fix then?
> >
> > Something like that?
> > ---------------------------->8-----------------------------
> > #define AUDIT_ARCH_ARC (EM_ARC)
> > #define AUDIT_ARCH_ARCV2 (EM_ARCV2)
> >
> >
> > static inline int syscall_get_arch(void)
> > {
> > #ifdef __ARC700__
> > return AUDIT_ARCH_ARC;
> > #else
> > return AUDIT_ARCH_ARCV2;
> > #endif
> > }
> > ---------------------------->8-----------------------------
> >
>
> Maybe, but I know basically nothing about ARC. Is the syscall numbering or calling convention different on ARC vs ARCv2?
Syscall numbering should be the same as we use UAPI for both ARCompact (AKA ARCv1)
and ARCv2. As for calling convention I think it indeed differs.
Note ARCompact and ARCv2 ISAs are binary incompatible!
Even though assembly look pretty much the same (sans instructions
available only for either ARCompact or ARCv2) encodings are different so
in that sense these are completely different architectures.
Also I'm wondering what could be other cases for use of syscall_get_arch().
So I'd say it's better to report different values for ARC ISAs.
And given we use the same values as in Binutils IMHO it would be good
to not mix IDs here.
-Alexey
next prev parent reply other threads:[~2018-11-09 16:11 UTC|newest]
Thread overview: 225+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 3:27 [RFC PATCH] ptrace: add PTRACE_GET_SYSCALL_INFO request Elvira Khabirova
2018-11-07 11:21 ` Oleg Nesterov
2018-11-07 14:06 ` Andy Lutomirski
2018-11-07 16:44 ` Oleg Nesterov
2018-11-07 20:02 ` Elvira Khabirova
2018-11-08 9:16 ` Oleg Nesterov
2018-11-07 20:20 ` Andy Lutomirski
2018-11-08 14:33 ` Oleg Nesterov
2018-11-07 16:12 ` Dmitry V. Levin
2018-11-07 15:50 ` Dmitry V. Levin
2018-11-07 20:44 ` Andy Lutomirski
2018-11-09 3:13 ` [PATCH 00/13] Prepare for PTRACE_GET_SYSCALL_INFO Dmitry V. Levin
2018-11-09 3:13 ` Dmitry V. Levin
2018-11-09 3:13 ` Dmitry V. Levin
2018-11-09 3:13 ` Dmitry V. Levin
2018-11-09 3:13 ` Dmitry V. Levin
2018-11-09 3:15 ` [PATCH 01/13] Move EM_HEXAGON to uapi/linux/elf-em.h Dmitry V. Levin
2018-11-09 3:15 ` [PATCH 02/13] elf-em.h: add EM_ARC Dmitry V. Levin
2018-11-09 3:15 ` Dmitry V. Levin
2018-11-09 14:20 ` Alexey Brodkin
2018-11-09 14:20 ` Alexey Brodkin
2018-11-09 16:41 ` Vineet Gupta
2018-11-09 16:41 ` Vineet Gupta
2018-11-09 21:44 ` Dmitry V. Levin
2018-11-09 21:44 ` Dmitry V. Levin
2018-11-09 23:33 ` [PATCH 02/13 v2] Move EM_ARCOMPACT and EM_ARCV2 to uapi/linux/elf-em.h Dmitry V. Levin
2018-11-09 23:33 ` Dmitry V. Levin
2018-11-09 23:42 ` Vineet Gupta
2018-11-09 23:42 ` Vineet Gupta
2018-11-09 3:15 ` [PATCH 03/13] elf-em.h: add EM_NDS32 Dmitry V. Levin
2018-11-09 3:15 ` [PATCH 04/13] elf-em.h: add EM_XTENSA Dmitry V. Levin
2018-11-09 6:45 ` Max Filippov
2018-11-09 3:15 ` [PATCH 05/13] m68k: define syscall_get_arch() Dmitry V. Levin
2018-11-09 3:16 ` [PATCH 06/13] arc: " Dmitry V. Levin
2018-11-09 3:16 ` Dmitry V. Levin
2018-11-09 14:22 ` Alexey Brodkin
2018-11-09 14:22 ` Alexey Brodkin
2018-11-09 14:22 ` Alexey Brodkin
2018-11-09 15:17 ` Andy Lutomirski
2018-11-09 15:17 ` Andy Lutomirski
2018-11-09 15:27 ` Alexey Brodkin
2018-11-09 15:27 ` Alexey Brodkin
2018-11-09 15:27 ` Alexey Brodkin
2018-11-09 15:56 ` Andy Lutomirski
2018-11-09 15:56 ` Andy Lutomirski
2018-11-09 15:56 ` Andy Lutomirski
2018-11-09 16:11 ` Alexey Brodkin [this message]
2018-11-09 16:11 ` Alexey Brodkin
2018-11-09 16:11 ` Alexey Brodkin
2018-11-09 16:35 ` Andy Lutomirski
2018-11-09 16:35 ` Andy Lutomirski
2018-11-09 23:33 ` [PATCH 06/13 v2] " Dmitry V. Levin
2018-11-09 23:33 ` Dmitry V. Levin
2018-11-09 23:39 ` Vineet Gupta
2018-11-09 23:39 ` Vineet Gupta
2018-11-09 23:39 ` Vineet Gupta
2018-11-09 23:54 ` [PATCH 06/13 v3] " Dmitry V. Levin
2018-11-09 23:54 ` Dmitry V. Levin
2018-11-10 0:06 ` Vineet Gupta
2018-11-10 0:06 ` Vineet Gupta
2018-11-10 0:06 ` Vineet Gupta
2018-11-09 16:50 ` [PATCH 06/13] " Vineet Gupta
2018-11-09 16:50 ` Vineet Gupta
2018-11-09 16:50 ` Vineet Gupta
2018-11-09 19:03 ` Andy Lutomirski
2018-11-09 19:03 ` Andy Lutomirski
2018-11-09 19:03 ` Andy Lutomirski
2018-11-09 19:13 ` Vineet Gupta
2018-11-09 19:13 ` Vineet Gupta
2018-11-09 19:13 ` Vineet Gupta
2018-11-09 3:16 ` [PATCH 07/13] c6x: " Dmitry V. Levin
2018-11-10 2:01 ` [PATCH 07/13 v2] " Dmitry V. Levin
2018-11-09 3:16 ` [PATCH 08/13] h8300: " Dmitry V. Levin
2018-11-09 3:16 ` [PATCH 09/13] hexagon: " Dmitry V. Levin
2018-11-09 3:16 ` [PATCH 10/13] nds32: " Dmitry V. Levin
2018-11-10 2:01 ` [PATCH 10/13 v2] " Dmitry V. Levin
2018-11-09 3:17 ` [PATCH 11/13] nios2: " Dmitry V. Levin
2018-11-09 3:17 ` [PATCH 12/13] riscv: " Dmitry V. Levin
2018-11-09 3:17 ` Dmitry V. Levin
2018-11-09 3:17 ` Dmitry V. Levin
2018-11-09 6:59 ` David Abdurachmanov
2018-11-09 6:59 ` David Abdurachmanov
2018-11-09 6:59 ` David Abdurachmanov
2018-11-09 22:28 ` Dmitry V. Levin
2018-11-09 22:28 ` Dmitry V. Levin
2018-11-09 22:28 ` Dmitry V. Levin
2018-11-10 5:12 ` David Abdurachmanov
2018-11-10 5:12 ` David Abdurachmanov
2018-11-10 5:12 ` David Abdurachmanov
2018-11-10 9:27 ` Andreas Schwab
2018-11-10 9:27 ` Andreas Schwab
2018-11-10 9:27 ` Andreas Schwab
2018-11-10 9:27 ` Andreas Schwab
2018-11-09 18:45 ` Palmer Dabbelt
2018-11-09 18:45 ` Palmer Dabbelt
2018-11-09 18:45 ` Palmer Dabbelt
2018-11-09 21:31 ` Dmitry V. Levin
2018-11-09 21:31 ` Dmitry V. Levin
2018-11-09 21:31 ` Dmitry V. Levin
2018-11-09 22:48 ` [PATCH 12/13 v2] " Dmitry V. Levin
2018-11-09 22:48 ` Dmitry V. Levin
2018-11-09 22:48 ` Dmitry V. Levin
2018-11-11 21:21 ` Palmer Dabbelt
2018-11-11 21:21 ` Palmer Dabbelt
2018-11-11 21:21 ` Palmer Dabbelt
2018-11-09 3:17 ` [PATCH 13/13] xtensa: " Dmitry V. Levin
2018-11-09 6:48 ` Max Filippov
2018-11-09 6:06 ` [PATCH 00/13] Prepare for PTRACE_GET_SYSCALL_INFO Andy Lutomirski
2018-11-09 6:06 ` Andy Lutomirski
2018-11-09 6:06 ` Andy Lutomirski
2018-11-09 6:06 ` Andy Lutomirski
2018-11-09 6:06 ` Andy Lutomirski
2018-11-10 14:09 ` [PATCH 14/13] Move EM_UNICORE to uapi/linux/elf-em.h Dmitry V. Levin
2018-11-10 14:10 ` [PATCH 15/13] unicore32: define syscall_get_arch() Dmitry V. Levin
2018-11-13 3:38 ` [RFC PATCH] ptrace: add PTRACE_GET_SYSCALL_INFO request Dmitry V. Levin
2018-11-20 0:11 ` [PATCH v2 00/15] Prepare for PTRACE_GET_SYSCALL_INFO Dmitry V. Levin
2018-11-20 0:11 ` Dmitry V. Levin
2018-11-20 0:11 ` Dmitry V. Levin
2018-11-20 0:11 ` Dmitry V. Levin
2018-11-20 0:11 ` Dmitry V. Levin
2018-11-20 0:14 ` [PATCH v2 01/15] Move EM_HEXAGON to uapi/linux/elf-em.h Dmitry V. Levin
2018-11-20 0:14 ` [PATCH v2 02/15] Move EM_ARCOMPACT and EM_ARCV2 " Dmitry V. Levin
2018-11-20 0:14 ` Dmitry V. Levin
2018-11-20 0:14 ` [PATCH v2 03/15] Move EM_UNICORE " Dmitry V. Levin
2018-11-20 0:15 ` [PATCH v2 04/15] elf-em.h: add EM_NDS32 Dmitry V. Levin
2018-11-20 0:15 ` [PATCH v2 05/15] elf-em.h: add EM_XTENSA Dmitry V. Levin
2018-11-20 0:15 ` [PATCH v2 06/15] m68k: define syscall_get_arch() Dmitry V. Levin
2018-12-02 10:29 ` Geert Uytterhoeven
2018-12-03 0:24 ` Dmitry V. Levin
2018-12-03 7:36 ` Geert Uytterhoeven
2018-11-20 0:15 ` [PATCH v2 07/15] arc: " Dmitry V. Levin
2018-11-20 0:15 ` Dmitry V. Levin
2018-11-20 0:15 ` [PATCH v2 08/15] c6x: " Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 09/15] h8300: " Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 10/15] hexagon: " Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 11/15] nds32: " Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 12/15] nios2: " Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 13/15] riscv: " Dmitry V. Levin
2018-11-20 0:16 ` Dmitry V. Levin
2018-11-20 0:16 ` Dmitry V. Levin
2018-11-20 0:16 ` [PATCH v2 14/15] unicore32: " Dmitry V. Levin
2018-11-20 0:17 ` [PATCH v2 15/15] xtensa: " Dmitry V. Levin
2018-11-20 20:26 ` [PATCH v2 00/15] Prepare for PTRACE_GET_SYSCALL_INFO Paul Moore
2018-11-20 20:26 ` Paul Moore
2018-11-20 20:26 ` Paul Moore
2018-11-20 20:26 ` Paul Moore
2018-11-21 0:44 ` [PATCH v2 16/15] syscall_get_arch: add "struct task_struct *" argument Dmitry V. Levin
2018-11-21 0:44 ` [OpenRISC] " Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 0:44 ` Dmitry V. Levin
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` [OpenRISC] " Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:15 ` Andy Lutomirski
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` [OpenRISC] " Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 15:47 ` Palmer Dabbelt
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` [OpenRISC] " Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 18:40 ` Paul Burton
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` [OpenRISC] " Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:00 ` Dmitry V. Levin
2018-11-21 19:14 ` [PATCH] mips: fix mips_get_syscall_arg o32 check Dmitry V. Levin
2018-11-21 19:23 ` Paul Burton
2018-11-21 19:23 ` Paul Burton
2018-11-21 19:35 ` [PATCH v2 16/15 v2] syscall_get_arch: add "struct task_struct *" argument Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` [OpenRISC] " Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:35 ` Dmitry V. Levin
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` [OpenRISC] " Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-21 19:45 ` Paul Burton
2018-11-27 10:34 ` [PATCH v2 16/15] " Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
2018-11-27 10:34 ` [OpenRISC] " Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
2018-11-27 10:34 ` Michael Ellerman
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