On 29.05.2020 23:17, Andrew Cooper wrote:
> On 29/05/2020 20:43, Andrew Cooper wrote:
>> On 28/05/2020 17:15, Jan Beulich wrote:
>>> On 27.05.2020 21:18, Andrew Cooper wrote:
+
+if ( ptr[0] == regs->rip && ptr[1] == regs->cs )
+{
+asm ( "wrssq %[fix],
On 29.05.2020 21:43, Andrew Cooper wrote:
> On 28/05/2020 17:15, Jan Beulich wrote:
>> On 27.05.2020 21:18, Andrew Cooper wrote:
>>> @@ -763,6 +775,56 @@ static void do_reserved_trap(struct cpu_user_regs
>>> *regs)
>>>trapnr, vec_name(trapnr), regs->error_code);
>>> }
>>>
>>> +stati
On 29/05/2020 20:43, Andrew Cooper wrote:
> On 28/05/2020 17:15, Jan Beulich wrote:
>> On 27.05.2020 21:18, Andrew Cooper wrote:
>>> +
>>> +if ( ptr[0] == regs->rip && ptr[1] == regs->cs )
>>> +{
>>> +asm ( "wrssq %[fix], %[stk]"
>>> + : [stk] "=m" (*ptr
On 28/05/2020 17:15, Jan Beulich wrote:
> On 27.05.2020 21:18, Andrew Cooper wrote:
>> @@ -400,6 +400,18 @@ unsigned long get_stack_trace_bottom(unsigned long sp)
>> }
>> }
>>
>> +static unsigned long get_shstk_bottom(unsigned long sp)
>> +{
>> +switch ( get_stack_page(sp) )
>> +{
>
On 27.05.2020 21:18, Andrew Cooper wrote:
> @@ -400,6 +400,18 @@ unsigned long get_stack_trace_bottom(unsigned long sp)
> }
> }
>
> +static unsigned long get_shstk_bottom(unsigned long sp)
> +{
> +switch ( get_stack_page(sp) )
> +{
> +#ifdef CONFIG_XEN_SHSTK
> +case 0: return R
When adjusting an IRET frame to recover from a fault, and equivalent
adjustment needs making in the shadow IRET frame.
The adjustment in exception_with_ints_disabled() could in principle be an
alternative block rather than an ifdef, as the only two current users of
_PRE_EXTABLE() are IRET-to-guest
