include/syscall.h

   1 #ifndef SYSCALL_H
   2 #define SYSCALL_H
   3
   4 extern void syscall_interrupt(void);
   5
   6 #define _syscall0(type,name) \
   7 type name(void) \
   8 { \
   9 long __res; \
  10 __asm__ volatile ("int $0x80" \
  11         : "=a" (__res) \
  12         : "0" (__NR_##name)); \
  13 if (__res >= 0) \
  14         return (type) __res; \
  15 return -1; \
  16 }
  17
  18 #define _syscall1(type,name,atype,a) \
  19 type name(atype a) \
  20 { \
  21 long __res; \
  22 __asm__ volatile ("int $0x80" \
  23         : "=a" (__res) \
  24         : "0" (__NR_##name),"b" ((long)(a))); \
  25 if (__res >= 0) \
  26         return (type) __res; \
  27 return -1; \
  28 }
  29
  30 #define _syscall2(type,name,atype,a,btype,b) \
  31 type name(atype a,btype b) \
  32 { \
  33 long __res; \
  34 __asm__ volatile ("int $0x80" \
  35         : "=a" (__res) \
  36         : "0" (__NR_##name),"b" ((long)(a)),"c" ((long)(b))); \
  37 if (__res >= 0) \
  38         return (type) __res; \
  39 return -1; \
  40 }
  41
  42 #define _syscall3(type,name,atype,a,btype,b,ctype,c) \
  43 type name(atype a,btype b,ctype c) \
  44 { \
  45 long __res; \
  46 __asm__ volatile ("int $0x80" \
  47         : "=a" (__res) \
  48         : "a" (__NR_##name),"b" ((long)(a)),"c" ((long)(b)),"d" ((long)(c))); \
  49 if (__res>=0) \
  50         return (type) __res; \
  51 return -1; \
  52 }
  53
  54 #endif /* syscall.h */