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SubjectRe: [PATCH 1/3] MIPS: ftrace: Fix N32 save registers


On Mon, Feb 1, 2021, at 9:12 AM, Jinyang He wrote:
> On 01/31/2021 06:38 PM, Jiaxun Yang wrote:
>
> >
> > On Sun, Jan 31, 2021, at 4:14 PM, Jinyang He wrote:
> >> CONFIG_64BIT is confusing. N32 also pass parameters by a0~a7.
> > Do we have NEW kernel build?
> > CONFIG_64BIT assumed N64 as kernel ABI.
> >
> >
> > -Jiaxun
> Hi, Jiaxun,
>
> Thank you for your reply, and now I know. Before that, I saw the macro
> from arch/mips/include/asm/regdef.h and thought it needed to be modified
> here. But that seems have no sence.
> Please ignore this patch.

I guess that's for uapi consideration.

Thanks.


- Jiaxun



>
> Thanks,
> Jinyang
>
> >> Signed-off-by: Jinyang He <hejinyang@loongson.cn>
> >> ---
> >> arch/mips/kernel/mcount.S | 4 ++--
> >> 1 file changed, 2 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
> >> index cff52b2..808257a 100644
> >> --- a/arch/mips/kernel/mcount.S
> >> +++ b/arch/mips/kernel/mcount.S
> >> @@ -27,7 +27,7 @@
> >> PTR_S a1, PT_R5(sp)
> >> PTR_S a2, PT_R6(sp)
> >> PTR_S a3, PT_R7(sp)
> >> -#ifdef CONFIG_64BIT
> >> +#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
> >> PTR_S a4, PT_R8(sp)
> >> PTR_S a5, PT_R9(sp)
> >> PTR_S a6, PT_R10(sp)
> >> @@ -42,7 +42,7 @@
> >> PTR_L a1, PT_R5(sp)
> >> PTR_L a2, PT_R6(sp)
> >> PTR_L a3, PT_R7(sp)
> >> -#ifdef CONFIG_64BIT
> >> +#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
> >> PTR_L a4, PT_R8(sp)
> >> PTR_L a5, PT_R9(sp)
> >> PTR_L a6, PT_R10(sp)
> >> --
> >> 2.1.0
> >>
> >>
>
>

--
- Jiaxun

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