lunaix-os/includes/lunaix/syscall.h

   1 #ifndef __LUNAIX_SYSCALL_H
   2 #define __LUNAIX_SYSCALL_H
   3
   4 #include <arch/x86/vectors.h>
   5
   6 #define __SYSCALL_fork 1
   7 #define __SYSCALL_yield 2
   8 #define __SYSCALL_sbrk 3
   9 #define __SYSCALL_brk 4
  10 #define __SYSCALL_getpid 5
  11 #define __SYSCALL_getppid 6
  12 #define __SYSCALL_sleep 7
  13 #define __SYSCALL__exit 8
  14 #define __SYSCALL_wait 9
  15
  16 #define __SYSCALL_MAX 0x100
  17
  18 #ifndef __ASM__
  19 void
  20 syscall_install();
  21
  22 static void*
  23 syscall(unsigned int callcode)
  24 {
  25     asm volatile("int %0" ::"i"(LUNAIX_SYS_CALL), "D"(callcode) : "eax");
  26 }
  27
  28 #define asmlinkage __attribute__((regparm(0)))
  29
  30 #define __PARAM_MAP1(t1, p1) t1 p1
  31 #define __PARAM_MAP2(t1, p1, ...) t1 p1, __PARAM_MAP1(__VA_ARGS__)
  32 #define __PARAM_MAP3(t1, p1, ...) t1 p1, __PARAM_MAP2(__VA_ARGS__)
  33 #define __PARAM_MAP4(t1, p1, ...) t1 p1, __PARAM_MAP3(__VA_ARGS__)
  34 #define __PARAM_MAP5(t1, p1, ...) t1 p1, __PARAM_MAP4(__VA_ARGS__)
  35 #define __PARAM_MAP6(t1, p1, ...) t1 p1, __PARAM_MAP5(__VA_ARGS__)
  36
  37 #define ___DOINT33(callcode, rettype)                                          \
  38     int v;                                                                     \
  39     asm volatile("int %1\n" : "=a"(v) : "i"(LUNAIX_SYS_CALL), "a"(callcode));  \
  40     return (rettype)v;
  41
  42 #define __DEFINE_LXSYSCALL(rettype, name) asmlinkage rettype __lxsys_##name()
  43
  44 #define __DEFINE_LXSYSCALL1(rettype, name, t1, p1)                             \
  45     asmlinkage rettype __lxsys_##name(__PARAM_MAP1(t1, p1))
  46
  47 #define __DEFINE_LXSYSCALL2(rettype, name, t1, p1, t2, p2)                     \
  48     asmlinkage rettype __lxsys_##name(__PARAM_MAP2(t1, p1, t2, p2))
  49
  50 #define __DEFINE_LXSYSCALL3(rettype, name, t1, p1, t2, p2, t3, p3)             \
  51     asmlinkage rettype __lxsys_##name(__PARAM_MAP3(t1, p1, t2, p2, t3, p3));
  52
  53 #define __DEFINE_LXSYSCALL4(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4)     \
  54     asmlinkage rettype __lxsys_##nam(                                          \
  55       __PARAM_MAP4(t1, p1, t2, p2, t3, p3, t4, p4))
  56
  57 #define __LXSYSCALL(rettype, name)                                             \
  58     static rettype name()                                                      \
  59     {                                                                          \
  60         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  61     }
  62
  63 #define __LXSYSCALL1(rettype, name, t1, p1)                                    \
  64     static rettype name(__PARAM_MAP1(t1, p1))                                  \
  65     {                                                                          \
  66         asm("" ::"b"(p1));                                                     \
  67         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  68     }
  69
  70 #define __LXSYSCALL2(rettype, name, t1, p1, t2, p2)                            \
  71     static rettype name(__PARAM_MAP2(t1, p1, t2, p2))                          \
  72     {                                                                          \
  73         asm("\n" ::"b"(p1), "c"(p2));                                          \
  74         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  75     }
  76
  77 #define __LXSYSCALL3(rettype, name, t1, p1, t2, p2, t3, p3)                    \
  78     static rettype name(__PARAM_MAP3(t1, p1, t2, p2, t3, p3))                  \
  79     {                                                                          \
  80         asm("\n" ::"b"(p1), "c"(p2), "d"(p3));                                 \
  81         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  82     }
  83
  84 #define __LXSYSCALL4(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4)            \
  85     static rettype name(__PARAM_MAP3(t1, p1, t2, p2, t3, p3, t4, p4))          \
  86     {                                                                          \
  87         asm("\n" ::"b"(p1), "c"(p2), "d"(p3), "D"(p4));                        \
  88         ___DOINT33(__SYSCALL_##name, rettype)                                  \
  89     }
  90 #endif
  91 #endif /* __LUNAIX_SYSCALL_H */