arch/m68k/include/asm/linkage.h

   1 #ifndef __ASM_LINKAGE_H
   2 #define __ASM_LINKAGE_H
   3
   4 #define __ALIGN .align 4
   5 #define __ALIGN_STR ".align 4"
   6
   7 /*
   8  * Make sure the compiler doesn't do anything stupid with the
   9  * arguments on the stack - they are owned by the *caller*, not
  10  * the callee. This just fools gcc into not spilling into them,
  11  * and keeps it from doing tailcall recursion and/or using the
  12  * stack slots for temporaries, since they are live and "used"
  13  * all the way to the end of the function.
  14  */
  15 #define asmlinkage_protect(n, ret, args...) \
  16         __asmlinkage_protect##n(ret, ##args)
  17 #define __asmlinkage_protect_n(ret, args...) \
  18         __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
  19 #define __asmlinkage_protect0(ret) \
  20         __asmlinkage_protect_n(ret)
  21 #define __asmlinkage_protect1(ret, arg1) \
  22         __asmlinkage_protect_n(ret, "m" (arg1))
  23 #define __asmlinkage_protect2(ret, arg1, arg2) \
  24         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2))
  25 #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
  26         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3))
  27 #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
  28         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  29                               "m" (arg4))
  30 #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
  31         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  32                               "m" (arg4), "m" (arg5))
  33 #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
  34         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  35                               "m" (arg4), "m" (arg5), "m" (arg6))
  36
  37 #endif