arch/m68k/include/asm/linkage.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_LINKAGE_H
   3 #define __ASM_LINKAGE_H
   4
   5 #define __ALIGN .align 4
   6 #define __ALIGN_STR ".align 4"
   7
   8 /*
   9  * Make sure the compiler doesn't do anything stupid with the
  10  * arguments on the stack - they are owned by the *caller*, not
  11  * the callee. This just fools gcc into not spilling into them,
  12  * and keeps it from doing tailcall recursion and/or using the
  13  * stack slots for temporaries, since they are live and "used"
  14  * all the way to the end of the function.
  15  */
  16 #define asmlinkage_protect(n, ret, args...) \
  17         __asmlinkage_protect##n(ret, ##args)
  18 #define __asmlinkage_protect_n(ret, args...) \
  19         __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
  20 #define __asmlinkage_protect0(ret) \
  21         __asmlinkage_protect_n(ret)
  22 #define __asmlinkage_protect1(ret, arg1) \
  23         __asmlinkage_protect_n(ret, "m" (arg1))
  24 #define __asmlinkage_protect2(ret, arg1, arg2) \
  25         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2))
  26 #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
  27         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3))
  28 #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
  29         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  30                               "m" (arg4))
  31 #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
  32         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  33                               "m" (arg4), "m" (arg5))
  34 #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
  35         __asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
  36                               "m" (arg4), "m" (arg5), "m" (arg6))
  37
  38 #endif