On Wed, 14 Jan 2026 10:19:02 +0800
Menglong Dong [off-list ref] wrote:

On 2026/1/14 09:22 Andrii Nakryiko [off-list ref] write:

quoted

On Sat, Jan 10, 2026 at 6:11 AM Menglong Dong [off-list ref] wrote:  

quoted

For now, ctx[-1] is used to store the nr_args in the trampoline. However,
1-byte is enough to store such information. Therefore, we use only the
last byte of ctx[-1] to store the nr_args, and reserve the rest for other  

Looking at the assembly below I think you are extracting the least
significant byte, right? I'd definitely not call it "last" byte...
Let's be precise and unambiguous here.  

Yeah, the "last 8-bits", "last byte" is ambiguous. So let's describe it as
"the least significant byte" here instead :)

Or just s/last/low/

	David

Thanks!
Menglong Dong