const golang.org/x/sys/unix.PTRACE_GETFPXREGS

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L226: 	PTRACE_GETFPXREGS                = 0x12

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)