2020-03-22 05:40:57

by YunQiang Su

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

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 behaivor 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 <[email protected]>
---
man3/getauxval.3 | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/man3/getauxval.3 b/man3/getauxval.3
index 456371c6a..518faf5d3 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 identifys the real platform; may differ from
+.BR AT_PLATFORM "."
+On MIPS, this identifys the ISA level (Since 5.7).
.TP
.BR AT_CLKTCK
The frequency with which
--
2.26.0.rc2

2020-03-22 08:34:57

by Sergei Shtylyov

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

Hello!

On 22.03.2020 8:39, 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 behaivor is different with PowerPC.

Behavior.

> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22
> Signed-off-by: YunQiang Su <[email protected]>
> ---
> man3/getauxval.3 | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/man3/getauxval.3 b/man3/getauxval.3
> index 456371c6a..518faf5d3 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 identifys the real platform; may differ from

Identifies.

> +.BR AT_PLATFORM "."
> +On MIPS, this identifys the ISA level (Since 5.7).

Same here.

[...]

MBR, Sergei