arch/arm/syscall_arch.h

   1 #define __SYSCALL_LL_E(x) \
   2 ((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
   3 ((union { long long ll; long l[2]; }){ .ll = x }).l[1]
   4 #define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
   5
   6 #define __asm_syscall(...) do { \
   7         __asm__ __volatile__ ( "svc 0" \
   8         : "=r"(r0) : __VA_ARGS__ : "memory"); \
   9         return r0; \
  10         } while (0)
  11
  12 static inline long __syscall0(long n)
  13 {
  14         register long r7 __asm__("r7") = n;
  15         register long r0 __asm__("r0");
  16         __asm_syscall("r"(r7));
  17 }
  18
  19 static inline long __syscall1(long n, long a)
  20 {
  21         register long r7 __asm__("r7") = n;
  22         register long r0 __asm__("r0") = a;
  23         __asm_syscall("r"(r7), "0"(r0));
  24 }
  25
  26 static inline long __syscall2(long n, long a, long b)
  27 {
  28         register long r7 __asm__("r7") = n;
  29         register long r0 __asm__("r0") = a;
  30         register long r1 __asm__("r1") = b;
  31         __asm_syscall("r"(r7), "0"(r0), "r"(r1));
  32 }
  33
  34 static inline long __syscall3(long n, long a, long b, long c)
  35 {
  36         register long r7 __asm__("r7") = n;
  37         register long r0 __asm__("r0") = a;
  38         register long r1 __asm__("r1") = b;
  39         register long r2 __asm__("r2") = c;
  40         __asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2));
  41 }
  42
  43 static inline long __syscall4(long n, long a, long b, long c, long d)
  44 {
  45         register long r7 __asm__("r7") = n;
  46         register long r0 __asm__("r0") = a;
  47         register long r1 __asm__("r1") = b;
  48         register long r2 __asm__("r2") = c;
  49         register long r3 __asm__("r3") = d;
  50         __asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3));
  51 }
  52
  53 static inline long __syscall5(long n, long a, long b, long c, long d, long e)
  54 {
  55         register long r7 __asm__("r7") = n;
  56         register long r0 __asm__("r0") = a;
  57         register long r1 __asm__("r1") = b;
  58         register long r2 __asm__("r2") = c;
  59         register long r3 __asm__("r3") = d;
  60         register long r4 __asm__("r4") = e;
  61         __asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4));
  62 }
  63
  64 static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
  65 {
  66         register long r7 __asm__("r7") = n;
  67         register long r0 __asm__("r0") = a;
  68         register long r1 __asm__("r1") = b;
  69         register long r2 __asm__("r2") = c;
  70         register long r3 __asm__("r3") = d;
  71         register long r4 __asm__("r4") = e;
  72         register long r5 __asm__("r5") = f;
  73         __asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5));
  74 }
  75
  76 #define VDSO_USEFUL
  77 #define VDSO_CGT_SYM "__vdso_clock_gettime"
  78 #define VDSO_CGT_VER "LINUX_2.6"