39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ASM_LINKAGE_H
|
|
#define __ASM_LINKAGE_H
|
|
|
|
#define __ALIGN .align 4
|
|
#define __ALIGN_STR ".align 4"
|
|
|
|
/*
|
|
* Make sure the compiler doesn't do anything stupid with the
|
|
* arguments on the stack - they are owned by the *caller*, not
|
|
* the callee. This just fools gcc into not spilling into them,
|
|
* and keeps it from doing tailcall recursion and/or using the
|
|
* stack slots for temporaries, since they are live and "used"
|
|
* all the way to the end of the function.
|
|
*/
|
|
#define asmlinkage_protect(n, ret, args...) \
|
|
__asmlinkage_protect##n(ret, ##args)
|
|
#define __asmlinkage_protect_n(ret, args...) \
|
|
__asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
|
|
#define __asmlinkage_protect0(ret) \
|
|
__asmlinkage_protect_n(ret)
|
|
#define __asmlinkage_protect1(ret, arg1) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1))
|
|
#define __asmlinkage_protect2(ret, arg1, arg2) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2))
|
|
#define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3))
|
|
#define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
|
|
"m" (arg4))
|
|
#define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
|
|
"m" (arg4), "m" (arg5))
|
|
#define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
|
|
__asmlinkage_protect_n(ret, "m" (arg1), "m" (arg2), "m" (arg3), \
|
|
"m" (arg4), "m" (arg5), "m" (arg6))
|
|
|
|
#endif
|