Re: [PATCH] ARM: panic with a message when relocation type is unknown

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On 3/6/19 07:21, Ahmad Fatoum wrote:
> 
> 
> On 31/5/19 16:43, Sam Ravnborg wrote:
>> Hi Ahmad.
>>
>> On Fri, May 31, 2019 at 11:02:23AM +0200, Ahmad Fatoum wrote:
>>> Currently such failures result in a
>>>
>>> 	>00000000 00000000
>>>
>>> 	### ERROR ### Please RESET the board ###
>>>
>>> With this patch this now becomes
>>>
>>> 	>00000000 00000000
>>> 	Unknown relocation type
>>> 	### ERROR ### Please RESET the board ###
>>>
>>> which improves user experience a little bit.
>>>
>>> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
>>> ---
>>>  arch/arm/cpu/common.c | 4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/arm/cpu/common.c b/arch/arm/cpu/common.c
>>> index 821cafbf26c2..3668c5977ca9 100644
>>> --- a/arch/arm/cpu/common.c
>>> +++ b/arch/arm/cpu/common.c
>>> @@ -78,7 +78,7 @@ void relocate_to_current_adr(void)
>>>  			putc_ll(' ');
>>>  			puthex_ll(rel->r_addend);
>>>  			putc_ll('\n');
>>> -			panic("");
>>> +			panic("Unknown relocation type");
>>>  		}
>>>  
>>>  		dstart += sizeof(*rel);
>>> @@ -108,7 +108,7 @@ void relocate_to_current_adr(void)
>>>  			putc_ll(' ');
>>>  			puthex_ll(rel->r_offset);
>>>  			putc_ll('\n');
>>> -			panic("");
>>> +			panic("Unknown relocation type");
>>
>> If you added just a little bit more context then grepping the source
>> for the error message would only result in one hit.
>>
>> Like:
>> "Unknown relocation type (addend)"
>> "Unknown relocation type (offset)"
> 
> Good idea. Will do in v2.

Oh, looking at the full source, it's not really needed. The first panic
is guarded by a #if defined(CONFIG_CPU_64) and the other by  
#elif defined(CONFIG_CPU_32).

> 
>>
>> Or something like that.
>>
>> 	Sam
>>
> 

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