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) : "" (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
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