[PATCH v2 1/3] riscv: ptrace: add regs_set_register()

[Björn Töpel]

Ben Dooks <ben.dooks at codethink.co.uk> writes:

> Since we have regs_get_register() and we could use the set counterpart
> for things like fixing up traps, add regs_set_register() to set a pt_regs
> value from offset.
>
> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
> ---
> v2:
>   - fixed Andrew Jones' suggestions for comments
> ---
>  arch/riscv/include/asm/ptrace.h | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h
> index b5b0adcc85c1..45c503b592c8 100644
> --- a/arch/riscv/include/asm/ptrace.h
> +++ b/arch/riscv/include/asm/ptrace.h
> @@ -143,6 +143,26 @@ static inline unsigned long regs_get_register(struct pt_regs *regs,
>  	return *(unsigned long *)((unsigned long)regs + offset);
>  }
>  
> +/**
> + * regs_set_register() - set register value at its offset
> + * @regs:	pt_regs to which register value is set
> + * @offset:	offset of the register.
> + * @value:	value to set register to
> + *
> + * regs_set_register sets the value @to to a register whose offset from @regs.
> + * The @offset is the offset of the register in struct pt_regs.
> + * If @offset is bigger than MAX_REG_OFFSET, this will ignore the write.
> + */
> +static inline void regs_set_register(struct pt_regs *regs,
> +				     unsigned int offset,
> +				     unsigned long value)

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Björn