On 23.04.2024 16:59, Jan Beulich wrote:
> On 22.04.2024 20:14, Andrew Cooper wrote:
>> --- a/xen/arch/x86/alternative.c
>> +++ b/xen/arch/x86/alternative.c
>> @@ -244,10 +244,31 @@ static void init_or_livepatch
>> _apply_alternatives(struct alt_instr *start,
>>
>> memcpy(buf, repl,
On 22.04.2024 20:14, Andrew Cooper wrote:
> --- a/xen/arch/x86/alternative.c
> +++ b/xen/arch/x86/alternative.c
> @@ -244,10 +244,31 @@ static void init_or_livepatch
> _apply_alternatives(struct alt_instr *start,
>
> memcpy(buf, repl, a->repl_len);
>
> +/* Walk buf[] and
Right now, relocation of displacements is restricted to finding 0xe8/e9 as the
first byte of the replacement, but this is overly restrictive.
Use x86_decode_lite() to find and adjust all insn-relative fields.
As with disp8's not leaving the replacemnet block, some disp32's don't either.
e.g. the
