arch/riscv32/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) __SYSCALL_LL_E((x))
   5
   6 #define __asm_syscall(...) \
   7         __asm__ __volatile__ ("ecall\n\t" \
   8         : "=r"(a0) : __VA_ARGS__ : "memory"); \
   9         return a0; \
  10
  11 static inline long __syscall0(long n)
  12 {
  13         register long a7 __asm__("a7") = n;
  14         register long a0 __asm__("a0");
  15         __asm_syscall("r"(a7))
  16 }
  17
  18 static inline long __syscall1(long n, long a)
  19 {
  20         register long a7 __asm__("a7") = n;
  21         register long a0 __asm__("a0") = a;
  22         __asm_syscall("r"(a7), "0"(a0))
  23 }
  24
  25 static inline long __syscall2(long n, long a, long b)
  26 {
  27         register long a7 __asm__("a7") = n;
  28         register long a0 __asm__("a0") = a;
  29         register long a1 __asm__("a1") = b;
  30         __asm_syscall("r"(a7), "0"(a0), "r"(a1))
  31 }
  32
  33 static inline long __syscall3(long n, long a, long b, long c)
  34 {
  35         register long a7 __asm__("a7") = n;
  36         register long a0 __asm__("a0") = a;
  37         register long a1 __asm__("a1") = b;
  38         register long a2 __asm__("a2") = c;
  39         __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2))
  40 }
  41
  42 static inline long __syscall4(long n, long a, long b, long c, long d)
  43 {
  44         register long a7 __asm__("a7") = n;
  45         register long a0 __asm__("a0") = a;
  46         register long a1 __asm__("a1") = b;
  47         register long a2 __asm__("a2") = c;
  48         register long a3 __asm__("a3") = d;
  49         __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3))
  50 }
  51
  52 static inline long __syscall5(long n, long a, long b, long c, long d, long e)
  53 {
  54         register long a7 __asm__("a7") = n;
  55         register long a0 __asm__("a0") = a;
  56         register long a1 __asm__("a1") = b;
  57         register long a2 __asm__("a2") = c;
  58         register long a3 __asm__("a3") = d;
  59         register long a4 __asm__("a4") = e;
  60         __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4))
  61 }
  62
  63 static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
  64 {
  65         register long a7 __asm__("a7") = n;
  66         register long a0 __asm__("a0") = a;
  67         register long a1 __asm__("a1") = b;
  68         register long a2 __asm__("a2") = c;
  69         register long a3 __asm__("a3") = d;
  70         register long a4 __asm__("a4") = e;
  71         register long a5 __asm__("a5") = f;
  72         __asm_syscall("r"(a7), "0"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5))
  73 }
  74
  75 #define VDSO_USEFUL
  76 /* We don't have a clock_gettime function.
  77 #define VDSO_CGT_SYM "__vdso_clock_gettime"
  78 #define VDSO_CGT_VER "LINUX_2.6" */
  79
  80 #define IPC_64 0