linux-kernel - Re: [PATCH] MIPS: Add FP

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Message-ID: <20180719210007.u3ddehsxb573avli@pburton-laptop>
Date:   Thu, 19 Jul 2018 14:00:07 -0700
From:   Paul Burton <paul.burton@...s.com>
To:     Maciej Rozycki <Maciej.Rozycki@...s.com>
Cc:     James Hogan <jhogan@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] MIPS: Add FP_MODE regset support

Hi Maciej,

On Tue, May 15, 2018 at 03:40:18PM -0700, Maciej Rozycki wrote:
> Define an NT_MIPS_FP_MODE core file note and implement a corresponding 
> regset holding the state handled by PR_SET_FP_MODE and PR_GET_FP_MODE 
> prctl(2) requests.  This lets debug software correctly interpret the 
> contents of floating-point general registers both in live debugging and 
> in core files, and also switch floating-point modes of a live process.
> 
> Signed-off-by: Maciej W. Rozycki <macro@...s.com>
> ---
> NB due to patch conflicts this change relies on the DSP ASE regset series 
> <https://patchwork.kernel.org/patch/10402171/> to be applied first.
> ---
>  arch/mips/kernel/ptrace.c |   63 ++++++++++++++++++++++++++++++++++++++++++++++
>  include/uapi/linux/elf.h  |    1 
>  2 files changed, 64 insertions(+)

Thanks - applied to mips-next for 4.19, though with NT_MIPS_FP_MODE
changed to 0x801.

Paul