On 3/23/21 5:24 AM, Mark Rutland wrote:
> On Fri, Mar 19, 2021 at 05:03:09PM -0500, Madhavan T. Venkataraman wrote:
>> I solved this by using existing functions logically instead of inventing a
>> dummy function. I initialize pt_regs->stackframe[1] to an existing function
>> so that the stack tr
On Fri, Mar 19, 2021 at 05:03:09PM -0500, Madhavan T. Venkataraman wrote:
> I solved this by using existing functions logically instead of inventing a
> dummy function. I initialize pt_regs->stackframe[1] to an existing function
> so that the stack trace will not show a 0x0 entry as well as the ker
On 3/19/21 1:19 PM, Madhavan T. Venkataraman wrote:
>
>
> On 3/19/21 9:29 AM, Madhavan T. Venkataraman wrote:
>>
>>
>> On 3/19/21 7:30 AM, Mark Brown wrote:
>>> On Thu, Mar 18, 2021 at 03:26:13PM -0500, Madhavan T. Venkataraman wrote:
On 3/18/21 10:09 AM, Mark Brown wrote:
>>>
> If we
On 3/19/21 9:29 AM, Madhavan T. Venkataraman wrote:
>
>
> On 3/19/21 7:30 AM, Mark Brown wrote:
>> On Thu, Mar 18, 2021 at 03:26:13PM -0500, Madhavan T. Venkataraman wrote:
>>> On 3/18/21 10:09 AM, Mark Brown wrote:
>>
If we are going to add the extra record there would probably be less
>
On 3/19/21 7:30 AM, Mark Brown wrote:
> On Thu, Mar 18, 2021 at 03:26:13PM -0500, Madhavan T. Venkataraman wrote:
>> On 3/18/21 10:09 AM, Mark Brown wrote:
>
>>> If we are going to add the extra record there would probably be less
>>> potential for confusion if we pointed it at some sensibly na
On Thu, Mar 18, 2021 at 03:26:13PM -0500, Madhavan T. Venkataraman wrote:
> On 3/18/21 10:09 AM, Mark Brown wrote:
> > If we are going to add the extra record there would probably be less
> > potential for confusion if we pointed it at some sensibly named dummy
> > function so anything or anyone t
On 3/18/21 10:09 AM, Mark Brown wrote:
> On Mon, Mar 15, 2021 at 11:57:53AM -0500, madve...@linux.microsoft.com wrote:
>
>> In summary, task pt_regs->stackframe is where a successful stack trace ends.
>
>> .if \el == 0
>> - mov x29, xzr
>> + stp xzr, xzr, [sp, #S_ST
On Mon, Mar 15, 2021 at 11:57:53AM -0500, madve...@linux.microsoft.com wrote:
> In summary, task pt_regs->stackframe is where a successful stack trace ends.
> .if \el == 0
> - mov x29, xzr
> + stp xzr, xzr, [sp, #S_STACKFRAME]
> .else
> stp x29, x22
From: "Madhavan T. Venkataraman"
The unwinder needs to be able to reliably tell when it has reached the end
of a stack trace. One way to do this is to have the last stack frame at a
fixed offset from the base of the task stack. When the unwinder reaches
that offset, it knows it is done.
Kernel T
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