tl;dr: An updated reference site cataloging Linux system calls across 27 architectures (x64, arm64, RISC-V, LoongArch, etc.), showing syscall numbers, arguments, registers, and calling conventions for kernels from 3.3 to 7.3. Data is extracted directly from kernel source via SYSCALL_DEFINE macros, tracks when syscalls were added or removed, and is available as JSON downloads or via a REST API at api.syscall.sh.