fusl/arch/x32/syscall_arch.h

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

#define __scc(X) \
  sizeof(1 ? (X) : 0ULL) < 8 ? (unsigned long)(X) : (long long)(X)
typedef long long syscall_arg_t;
struct __timespec {
  long long tv_sec;
  long tv_nsec;
};
struct __timespec_kernel {
  long long tv_sec;
  long long tv_nsec;
};
#define __tsc(X) ((struct __timespec*)(unsigned long)(X))
#define __fixup(X)                     \
  do {                                 \
    if (X) {                           \
      ts->tv_sec = __tsc(X)->tv_sec;   \
      ts->tv_nsec = __tsc(X)->tv_nsec; \
      (X) = (unsigned long)ts;         \
    }                                  \
  } while (0)
#define __fixup_case_2    \
  case SYS_nanosleep:     \
    __fixup(a1);          \
    break;                \
  case SYS_clock_settime: \
    __fixup(a2);          \
    break;
#define __fixup_case_3                      \
  case SYS_clock_nanosleep:                 \
  case SYS_rt_sigtimedwait:                 \
  case SYS_ppoll:                           \
    __fixup(a3);                            \
    break;                                  \
  case SYS_utimensat:                       \
    if (a3) {                               \
      ts[0].tv_sec = __tsc(a3)[0].tv_sec;   \
      ts[0].tv_nsec = __tsc(a3)[0].tv_nsec; \
      ts[1].tv_sec = __tsc(a3)[1].tv_sec;   \
      ts[1].tv_nsec = __tsc(a3)[1].tv_nsec; \
      a3 = (unsigned long)ts;               \
    }                                       \
    break;
#define __fixup_case_4                                                \
  case SYS_futex:                                                     \
    if ((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */) \
      __fixup(a4);                                                    \
    break;
#define __fixup_case_5      \
  case SYS_mq_timedsend:    \
  case SYS_mq_timedreceive: \
  case SYS_pselect6:        \
    __fixup(a5);            \
    break;

static __inline long __syscall0(long long n) {
  unsigned long ret;
  __asm__ __volatile__("syscall" : "=a"(ret) : "a"(n) : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall1(long long n, long long a1) {
  unsigned long ret;
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1)
                       : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall2(long long n, long long a1, long long a2) {
  unsigned long ret;
  struct __timespec_kernel ts[1];
  switch (n) { __fixup_case_2; }
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1), "S"(a2)
                       : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall3(long long n,
                                long long a1,
                                long long a2,
                                long long a3) {
  unsigned long ret;
  struct __timespec_kernel ts[2];
  switch (n) {
    __fixup_case_2;
    __fixup_case_3;
  }
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1), "S"(a2), "d"(a3)
                       : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall4(long long n,
                                long long a1,
                                long long a2,
                                long long a3,
                                long long a4_) {
  unsigned long ret;
  register long long a4 __asm__("r10") = a4_;
  struct __timespec_kernel ts[2];
  switch (n) {
    __fixup_case_2;
    __fixup_case_3;
    __fixup_case_4;
  }
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(a4)
                       : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall5(long long n,
                                long long a1,
                                long long a2,
                                long long a3,
                                long long a4_,
                                long long a5_) {
  unsigned long ret;
  register long long a4 __asm__("r10") = a4_;
  register long long a5 __asm__("r8") = a5_;
  struct __timespec_kernel ts[2];
  switch (n) {
    __fixup_case_2;
    __fixup_case_3;
    __fixup_case_4;
    __fixup_case_5;
  }
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(a4), "r"(a5)
                       : "rcx", "r11", "memory");
  return ret;
}

static __inline long __syscall6(long long n,
                                long long a1,
                                long long a2,
                                long long a3,
                                long long a4_,
                                long long a5_,
                                long long a6_) {
  unsigned long ret;
  register long long a4 __asm__("r10") = a4_;
  register long long a5 __asm__("r8") = a5_;
  register long long a6 __asm__("r9") = a6_;
  struct __timespec_kernel ts[2];
  switch (n) {
    __fixup_case_2;
    __fixup_case_3;
    __fixup_case_4;
    __fixup_case_5;
  }
  __asm__ __volatile__("syscall"
                       : "=a"(ret)
                       : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(a4), "r"(a5),
                         "r"(a6)
                       : "rcx", "r11", "memory");
  return ret;
}