It does suck that the usual 64-bit calling convention limits the size of strict ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		saurik on June 19, 2021 \| parent \| context \| favorite \| on: Designing a better strcpy It does suck that the usual 64-bit calling convention limits the size of strict passed by value to 64-bits :/.

gpderetta on June 20, 2021 | [–]

At least linux AMD64 ABI allows passing (and returning) 128 bit structures by registers, which is perfect for the ptr/len case.

thysultan on June 19, 2021 | [–]

You could store two 32 bit fields and cast the second to a pointer when needed, and the first treat as a length.

Consider applying for YC's Summer 2026 batch! Applications are open till May 4
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact