nsz Git - musl/blob - include/sys/syscall.h

   1 #ifndef _SYS_SYSCALL_H
   2 #define _SYS_SYSCALL_H
   3 #ifdef __cplusplus
   4 extern "C" {
   5 #endif
   6
   7 #include <features.h>
   8
   9 long __syscall_ret(unsigned long);
  10 long __syscall(long, ...);
  11 long syscall(long, ...);
  12
  13 #include <bits/syscall.h>
  14
  15 #define __syscall1(n,a) __syscall1(n,(long)(a))
  16 #define __syscall2(n,a,b) __syscall2(n,(long)(a),(long)(b))
  17 #define __syscall3(n,a,b,c) __syscall3(n,(long)(a),(long)(b),(long)(c))
  18 #define __syscall4(n,a,b,c,d) __syscall4(n,(long)(a),(long)(b),(long)(c),(long)(d))
  19 #define __syscall5(n,a,b,c,d,e) __syscall5(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e))
  20 #define __syscall6(n,a,b,c,d,e,f) __syscall6(n,(long)(a),(long)(b),(long)(c),(long)(d),(long)(e),(long)(f))
  21
  22 #define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,n,...) n
  23 #define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,6,5,4,3,2,1,0)
  24 #define __SYSCALL_CONCAT_X(a,b) a##b
  25 #define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
  26 #define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
  27
  28 #define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
  29 #define syscall(...) __syscall_ret(__syscall(__VA_ARGS__))
  30
  31 #ifdef __cplusplus
  32 }
  33 #endif
  34 #endif