klibc/include/arch/ppc/klibc/archsys.h

   1 /*
   2  * arch/ppc/include/klibc/archsys.h
   3  *
   4  * Architecture-specific syscall definitions
   5  */
   6
   7 #ifndef _KLIBC_ARCHSYS_H
   8 #define _KLIBC_ARCHSYS_H
   9
  10 /* PowerPC seems to lack _syscall6() in its headers */
  11 /* This seems to work on both 32- and 64-bit ppc */
  12
  13 #ifndef _syscall6
  14
  15 #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
  16           type5,arg5,type6,arg6) \
  17 type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
  18 { \
  19         unsigned long __sc_ret, __sc_err;                               \
  20         {                                                               \
  21                 register unsigned long __sc_0 __asm__ ("r0");           \
  22                 register unsigned long __sc_3 __asm__ ("r3");           \
  23                 register unsigned long __sc_4 __asm__ ("r4");           \
  24                 register unsigned long __sc_5 __asm__ ("r5");           \
  25                 register unsigned long __sc_6 __asm__ ("r6");           \
  26                 register unsigned long __sc_7 __asm__ ("r7");           \
  27                 register unsigned long __sc_8 __asm__ ("r8");           \
  28                                                                         \
  29                 __sc_3 = (unsigned long) (arg1);                        \
  30                 __sc_4 = (unsigned long) (arg2);                        \
  31                 __sc_5 = (unsigned long) (arg3);                        \
  32                 __sc_6 = (unsigned long) (arg4);                        \
  33                 __sc_7 = (unsigned long) (arg5);                        \
  34                 __sc_8 = (unsigned long) (arg6);                        \
  35                 __sc_0 = __NR_##name;                                   \
  36                 __asm__ __volatile__                                    \
  37                         ("sc           \n\t"                            \
  38                          "mfcr %1      "                                \
  39                         : "+r"   (__sc_3),                              \
  40                           "+r"   (__sc_0),                              \
  41                           "+r"   (__sc_4),                              \
  42                           "+r"   (__sc_5),                              \
  43                           "+r"   (__sc_6),                              \
  44                           "+r"   (__sc_7),                              \
  45                           "+r"   (__sc_8)                               \
  46                         : : "cr0", "ctr", "memory",                     \
  47                             "r9", "r10", "r11", "r12");                 \
  48                 __sc_ret = __sc_3;                                      \
  49                 __sc_err = __sc_0;                                      \
  50         }                                                               \
  51         if (__sc_err & 0x10000000)                                      \
  52         {                                                               \
  53                 errno = (int)__sc_ret;                                  \
  54                 __sc_ret = -1;                                          \
  55         }                                                               \
  56         return (type)__sc_ret;                                          \
  57 }
  58
  59 #endif /* _syscall6() missing */
  60
  61 #endif /* _KLIBC_ARCHSYS_H */