lunaix-os/usr/libc/arch/i386/syscall.h

   1 #ifndef __LUNAIX_SYSCALL_H
   2 #define __LUNAIX_SYSCALL_H
   3 #include <lunaix/syscallid.h>
   4
   5 #define asmlinkage __attribute__((regparm(0)))
   6
   7 #define __PARAM_MAP1(t1, p1) t1 p1
   8 #define __PARAM_MAP2(t1, p1, ...) t1 p1, __PARAM_MAP1(__VA_ARGS__)
   9 #define __PARAM_MAP3(t1, p1, ...) t1 p1, __PARAM_MAP2(__VA_ARGS__)
  10 #define __PARAM_MAP4(t1, p1, ...) t1 p1, __PARAM_MAP3(__VA_ARGS__)
  11 #define __PARAM_MAP5(t1, p1, ...) t1 p1, __PARAM_MAP4(__VA_ARGS__)
  12 #define __PARAM_MAP6(t1, p1, ...) t1 p1, __PARAM_MAP5(__VA_ARGS__)
  13
  14 #define ___DOINT33(callcode, rettype)                                          \
  15     int v;                                                                     \
  16     asm volatile("int %1\n" : "=a"(v) : "i"(33), "a"(callcode));               \
  17     return (rettype)v;
  18
  19 #define __LXSYSCALL(rettype, name)                                             \
  20     rettype name()                                                             \
  21     {                                                                          \
  22         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  23     }
  24
  25 #define __LXSYSCALL1(rettype, name, t1, p1)                                    \
  26     rettype name(__PARAM_MAP1(t1, p1))                                         \
  27     {                                                                          \
  28         asm("" ::"b"(p1));                                                     \
  29         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  30     }
  31
  32 #define __LXSYSCALL2(rettype, name, t1, p1, t2, p2)                            \
  33     rettype name(__PARAM_MAP2(t1, p1, t2, p2))                                 \
  34     {                                                                          \
  35         asm("\n" ::"b"(p1), "c"(p2));                                          \
  36         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  37     }
  38
  39 #define __LXSYSCALL3(rettype, name, t1, p1, t2, p2, t3, p3)                    \
  40     rettype name(__PARAM_MAP3(t1, p1, t2, p2, t3, p3))                         \
  41     {                                                                          \
  42         asm("\n" ::"b"(p1), "c"(p2), "d"(p3));                                 \
  43         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  44     }
  45
  46 #define __LXSYSCALL4(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4)            \
  47     rettype name(__PARAM_MAP4(t1, p1, t2, p2, t3, p3, t4, p4))                 \
  48     {                                                                          \
  49         asm("\n" ::"b"(p1), "c"(p2), "d"(p3), "D"(p4));                        \
  50         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  51     }
  52
  53 #define __LXSYSCALL5(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5)    \
  54     rettype name(__PARAM_MAP5(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5))         \
  55     {                                                                          \
  56         asm("" ::"r"(p5), "b"(p1), "c"(p2), "d"(p3), "D"(p4), "S"(p5));        \
  57         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  58     }
  59
  60 #define __LXSYSCALL2_VARG(rettype, name, t1, p1, t2, p2)                       \
  61     __attribute__((noinline)) rettype name(__PARAM_MAP2(t1, p1, t2, p2), ...)  \
  62     {                                                                          \
  63         /* No inlining! This depends on the call frame assumption */           \
  64         void* _last = (void*)&p2 + sizeof(void*);                              \
  65         asm("\n" ::"b"(p1), "c"(p2), "d"(_last));                              \
  66         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  67     }
  68
  69 #endif /* __LUNAIX_SYSCALL_H */