[U-Boot] [PATCH v2 1/1] arm: print instructions pointed to by pc

[Alexander Graf]

On 13.05.18 16:45, Marek Vasut wrote:
> On 05/13/2018 02:22 PM, Tuomas Tynkkynen wrote:
>> Hi,
>>
>> On Thu, 10 May 2018 16:38:30 +0200
>> Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>>
>>> If an exception occurs in a loaded image and the relocation offset is
>>> unknown, it is helful to know the instructions pointed to by the
>>> program counter. This patch adds the missing output.
>>>
>>> A possible output is:
>>>     *pc: fb de f7 e7 1e ff 2f e1 01 00 50 e3 f0 4d 2d e9 01 80 a0 e1
>>>
>>> The output can be disassembled with
>>>     xxd -pc -r - > a.out
>>>     $(CROSS_COMPILE)objdump -D -marm -b binary a.out
>>>
>>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
>>> ---
>>> v2
>>> 	print bytes not halfwords
>>
>> Note that Linux already comes with a scripts/decodecode tool where you paste the
>> output of an Oops and it disassembles the "Code: " line from the dump. So I'd
>> vote for importing scripts/decodecode from Linux and making U-Boot's output
>> compatible with Linux.
> 
> Sounds good.
> 
> btw if you get exception because the memory at PC is inaccessible, this
> will trigger a double-fault I think.

Yes, but it will only trigger it at the end of the handler at which
point we're panicking anyways, no?

Alex