On Tue, 2023-08-15 at 11:01 +0800, Leon Hwang wrote:
[...]
> a) Initial value of RAX is in emit_prologue().
> if (!ebpf_from_cbpf) {
> if (tail_call_reachable && !is_subprog)
> /* When it's the entry of the whole
> * tailcall context, zeroing the RAX
> * means init tail_call_cnt.
> */
> EMIT2(0x31, 0xC0); /* xor eax, eax */
> else
> // Keep the same asm layout.
> EMIT2(0x66, 0x90); /* nop2 */
> }
> I'd like to add this comment to emit_prologue().
Got it, thank you.
[...]
