LXR linux/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
  39