[PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level

[PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level

[YunQiang Su]

Since Linux 5.7, on MIPS, we use AT_BASE_PLATFORM to pass ISA level.
The values may be:
  mips2, mips3, mips4, mips5,
  mips32, mips32r2, mips32r6,
  mips64, mips64r2, mips64r6.

This behavior is different with PowerPC.

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22
Signed-off-by: YunQiang Su <syq@debian.org>

----
v1 -> v2: fix typo
---
 man3/getauxval.3 | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/man3/getauxval.3 b/man3/getauxval.3
index 456371c6a..bcc116dd2 100644
--- a/man3/getauxval.3
+++ b/man3/getauxval.3
@@ -60,9 +60,10 @@ values are present on all architectures.
 The base address of the program interpreter (usually, the dynamic linker).
 .TP
 .BR AT_BASE_PLATFORM
-A pointer to a string identifying the real platform; may differ from
-.BR AT_PLATFORM
-(PowerPC only).
+A pointer to a string (PowerPC and MIPS only).
+On PowerPC, this identifies the real platform; may differ from
+.BR AT_PLATFORM "."
+On MIPS, this identifies the ISA level (Since 5.7).
 .TP
 .BR AT_CLKTCK
 The frequency with which
-- 
2.26.0.rc2

Re: [PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level

[Michael Kerrisk (man-pages)]

Hello YunQiang Su

On 3/22/20 10:55 AM, YunQiang Su wrote:
> Since Linux 5.7, on MIPS, we use AT_BASE_PLATFORM to pass ISA level.
> The values may be:
>   mips2, mips3, mips4, mips5,
>   mips32, mips32r2, mips32r6,
>   mips64, mips64r2, mips64r6.
> 
> This behavior is different with PowerPC.

Thank you for the patch. I see that this is scheduled for 
Linux 5.7 (for which the merge window is not yet open).
How certain is it that the feature will land in 5.7?

Thanks,

Michael

> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22
> Signed-off-by: YunQiang Su <syq@debian.org>
> 
> ----
> v1 -> v2: fix typo
> ---
>  man3/getauxval.3 | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/man3/getauxval.3 b/man3/getauxval.3
> index 456371c6a..bcc116dd2 100644
> --- a/man3/getauxval.3
> +++ b/man3/getauxval.3
> @@ -60,9 +60,10 @@ values are present on all architectures.
>  The base address of the program interpreter (usually, the dynamic linker).
>  .TP
>  .BR AT_BASE_PLATFORM
> -A pointer to a string identifying the real platform; may differ from
> -.BR AT_PLATFORM
> -(PowerPC only).
> +A pointer to a string (PowerPC and MIPS only).
> +On PowerPC, this identifies the real platform; may differ from
> +.BR AT_PLATFORM "."
> +On MIPS, this identifies the ISA level (Since 5.7).
>  .TP
>  .BR AT_CLKTCK
>  The frequency with which
> 


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

Re: [PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level

[YunQiang Su]

Michael Kerrisk (man-pages) <mtk.manpages@gmail.com> 于2020年3月26日周四 下午4:12写道：
>
> Hello YunQiang Su
>
> On 3/22/20 10:55 AM, YunQiang Su wrote:
> > Since Linux 5.7, on MIPS, we use AT_BASE_PLATFORM to pass ISA level.
> > The values may be:
> >   mips2, mips3, mips4, mips5,
> >   mips32, mips32r2, mips32r6,
> >   mips64, mips64r2, mips64r6.
> >
> > This behavior is different with PowerPC.
>
> Thank you for the patch. I see that this is scheduled for
> Linux 5.7 (for which the merge window is not yet open).
> How certain is it that the feature will land in 5.7?

It is in mips-next and linux-next now.

>
> Thanks,
>
> Michael
>
> > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22
> > Signed-off-by: YunQiang Su <syq@debian.org>
> >
> > ----
> > v1 -> v2: fix typo
> > ---
> >  man3/getauxval.3 | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> >
> > diff --git a/man3/getauxval.3 b/man3/getauxval.3
> > index 456371c6a..bcc116dd2 100644
> > --- a/man3/getauxval.3
> > +++ b/man3/getauxval.3
> > @@ -60,9 +60,10 @@ values are present on all architectures.
> >  The base address of the program interpreter (usually, the dynamic linker).
> >  .TP
> >  .BR AT_BASE_PLATFORM
> > -A pointer to a string identifying the real platform; may differ from
> > -.BR AT_PLATFORM
> > -(PowerPC only).
> > +A pointer to a string (PowerPC and MIPS only).
> > +On PowerPC, this identifies the real platform; may differ from
> > +.BR AT_PLATFORM "."
> > +On MIPS, this identifies the ISA level (Since 5.7).
> >  .TP
> >  .BR AT_CLKTCK
> >  The frequency with which
> >
>
>
> --
> Michael Kerrisk
> Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
> Linux/UNIX System Programming Training: http://man7.org/training/

Re: [PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level

[Michael Kerrisk (man-pages)]

On 3/22/20 10:55 AM, YunQiang Su wrote:
> Since Linux 5.7, on MIPS, we use AT_BASE_PLATFORM to pass ISA level.
> The values may be:
>   mips2, mips3, mips4, mips5,
>   mips32, mips32r2, mips32r6,
>   mips64, mips64r2, mips64r6.
> 
> This behavior is different with PowerPC.
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22
> Signed-off-by: YunQiang Su <syq@debian.org>

Hello YunQiang Su,

Thank you. I've applied your patch.

Cheers,

Michael

> 
> ----
> v1 -> v2: fix typo
> ---
>  man3/getauxval.3 | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/man3/getauxval.3 b/man3/getauxval.3
> index 456371c6a..bcc116dd2 100644
> --- a/man3/getauxval.3
> +++ b/man3/getauxval.3
> @@ -60,9 +60,10 @@ values are present on all architectures.
>  The base address of the program interpreter (usually, the dynamic linker).
>  .TP
>  .BR AT_BASE_PLATFORM
> -A pointer to a string identifying the real platform; may differ from
> -.BR AT_PLATFORM
> -(PowerPC only).
> +A pointer to a string (PowerPC and MIPS only).
> +On PowerPC, this identifies the real platform; may differ from
> +.BR AT_PLATFORM "."
> +On MIPS, this identifies the ISA level (Since 5.7).
>  .TP
>  .BR AT_CLKTCK
>  The frequency with which
> 


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