func buildAARCH64()

in arch/mk_syscalls_linux.go [169:213]
35 lines of code
6 McCabe index (conditional complexity)

func buildAARCH64(dir string) (*Arch, error) {
	const (
		headerPath = "/include/uapi/asm-generic/unistd.h"
		sentinel   = "syscalls"
	)

	omit := map[string]bool{
		// sync_file_range2 shares a syscall number with
		// sync_file_range guarded by __ARCH_WANT_SYNC_FILE_RANGE2.
		// It is not possible to generate a map with both.
		"sync_file_range2": true,
	}

	armUnistdSycallRegex := regexp.MustCompile(
		`^#define __NR(?:3264)?_(?P<syscall>[a-z0-9_]+)\s+(?P<number>\d+)`)

	syscalls, err := readSyscalls(headerPath, dir, func(line string) (*Syscall, error) {
		matches := armUnistdSycallRegex.FindStringSubmatch(line)
		if len(matches) != 3 || matches[1] == sentinel || omit[matches[1]] {
			return nil, nil
		}

		num, err := strconv.Atoi(matches[2])
		if err != nil {
			return nil, fmt.Errorf("failed to parse syscall number: %v at '%v'", err, line)
		}

		return &Syscall{
			Num:  num,
			Name: matches[1],
		}, nil
	})
	if err != nil {
		return nil, err
	}

	sort.Slice(syscalls, func(i, j int) bool {
		return syscalls[i].Num < syscalls[j].Num
	})

	return &Arch{
		Name:     "AARCH64",
		Syscalls: syscalls,
	}, nil
}