src/cmd/vet/all/whitelist/freebsd_arm.txt

// freebsd/arm-specific vet whitelist. See readme.txt for details.

runtime/asm_arm.s: [arm] sigreturn: function sigreturn missing Go declaration
runtime/sys_freebsd_arm.s: [arm] read_tls_fallback: function read_tls_fallback missing Go declaration