fusl/arch/aarch64/syscall_arch.h

#define __SYSCALL_LL_E(x) (x)
#define __SYSCALL_LL_O(x) (x)

#define __asm_syscall(...)                                                   \
  do {                                                                       \
    __asm__ __volatile__("svc 0" : "=r"(x0) : __VA_ARGS__ : "memory", "cc"); \
    return x0;                                                               \
  } while (0)

static inline long __syscall0(long n) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0");
  __asm_syscall("r"(x8));
}

static inline long __syscall1(long n, long a) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  __asm_syscall("r"(x8), "0"(x0));
}

static inline long __syscall2(long n, long a, long b) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  register long x1 __asm__("x1") = b;
  __asm_syscall("r"(x8), "0"(x0), "r"(x1));
}

static inline long __syscall3(long n, long a, long b, long c) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  register long x1 __asm__("x1") = b;
  register long x2 __asm__("x2") = c;
  __asm_syscall("r"(x8), "0"(x0), "r"(x1), "r"(x2));
}

static inline long __syscall4(long n, long a, long b, long c, long d) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  register long x1 __asm__("x1") = b;
  register long x2 __asm__("x2") = c;
  register long x3 __asm__("x3") = d;
  __asm_syscall("r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3));
}

static inline long __syscall5(long n, long a, long b, long c, long d, long e) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  register long x1 __asm__("x1") = b;
  register long x2 __asm__("x2") = c;
  register long x3 __asm__("x3") = d;
  register long x4 __asm__("x4") = e;
  __asm_syscall("r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4));
}

static inline long
__syscall6(long n, long a, long b, long c, long d, long e, long f) {
  register long x8 __asm__("x8") = n;
  register long x0 __asm__("x0") = a;
  register long x1 __asm__("x1") = b;
  register long x2 __asm__("x2") = c;
  register long x3 __asm__("x3") = d;
  register long x4 __asm__("x4") = e;
  register long x5 __asm__("x5") = f;
  __asm_syscall("r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x5));
}

#define VDSO_USEFUL
#define VDSO_CGT_SYM "__kernel_clock_gettime"
#define VDSO_CGT_VER "LINUX_2.6.39"