Re: [PATCH v13 02/10] arm64: Add more test functions to insn.c

[David Long <dave.long@linaro.org>]

On 06/07/2016 09:14 PM, Masami Hiramatsu wrote:
> On Thu,  2 Jun 2016 23:26:16 -0400
> David Long <dave.long@linaro.org> wrote:
>> @@ -367,6 +402,7 @@ bool aarch32_insn_is_wide(u32 insn);
>>   #define A32_RT_OFFSET	12
>>   #define A32_RT2_OFFSET	 0
>>
>> +u32 aarch64_extract_system_register(u32 insn);
>
> This exported symbol is incorrect (see below)
>
>>   u32 aarch32_insn_extract_reg_num(u32 insn, int offset);
>>   u32 aarch32_insn_mcr_extract_opc2(u32 insn);
>>   u32 aarch32_insn_mcr_extract_crm(u32 insn);
>> diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
>> index 368c082..28c6110f 100644
>> --- a/arch/arm64/kernel/insn.c
>> +++ b/arch/arm64/kernel/insn.c
> [..]
>> @@ -1175,6 +1201,14 @@ u32 aarch64_set_branch_offset(u32 insn, s32 offset)
>>   	BUG();
>>   }
>>
>> +/*
>> + * Extract the Op/CR data from a msr/mrs instruction.
>> + */
>> +u32 aarch64_insn_extract_system_reg(u32 insn)
>> +{
>> +	return (insn & 0x1FFFE0) >> 5;
>> +}
>> +
>
> aarch64_insn_extract_system_reg() is the right name :)
>
> Thank you,
>
>
>>   bool aarch32_insn_is_wide(u32 insn)
>>   {
>>   	return insn >= 0xe800;
>> --
>> 2.5.0
>>
>
>

Thanks for finding that.

-dl