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/arch/x86/include/asm/linkage.h

https://bitbucket.org/ndreys/linux-sunxi
C++ Header | 61 lines | 39 code | 11 blank | 11 comment | 1 complexity | f0da833dd0ed451d0650be79cdd2b632 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1#ifndef _ASM_X86_LINKAGE_H
 2#define _ASM_X86_LINKAGE_H
 3
 4#include <linux/stringify.h>
 5
 6#undef notrace
 7#define notrace __attribute__((no_instrument_function))
 8
 9#ifdef CONFIG_X86_32
10#define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
11
12/*
13 * Make sure the compiler doesn't do anything stupid with the
14 * arguments on the stack - they are owned by the *caller*, not
15 * the callee. This just fools gcc into not spilling into them,
16 * and keeps it from doing tailcall recursion and/or using the
17 * stack slots for temporaries, since they are live and "used"
18 * all the way to the end of the function.
19 *
20 * NOTE! On x86-64, all the arguments are in registers, so this
21 * only matters on a 32-bit kernel.
22 */
23#define asmlinkage_protect(n, ret, args...) \
24	__asmlinkage_protect##n(ret, ##args)
25#define __asmlinkage_protect_n(ret, args...) \
26	__asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
27#define __asmlinkage_protect0(ret) \
28	__asmlinkage_protect_n(ret)
29#define __asmlinkage_protect1(ret, arg1) \
30	__asmlinkage_protect_n(ret, "g" (arg1))
31#define __asmlinkage_protect2(ret, arg1, arg2) \
32	__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2))
33#define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
34	__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3))
35#define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
36	__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
37			      "g" (arg4))
38#define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
39	__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
40			      "g" (arg4), "g" (arg5))
41#define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
42	__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
43			      "g" (arg4), "g" (arg5), "g" (arg6))
44
45#endif /* CONFIG_X86_32 */
46
47#ifdef __ASSEMBLY__
48
49#define GLOBAL(name)	\
50	.globl name;	\
51	name:
52
53#if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16)
54#define __ALIGN		.p2align 4, 0x90
55#define __ALIGN_STR	__stringify(__ALIGN)
56#endif
57
58#endif /* __ASSEMBLY__ */
59
60#endif /* _ASM_X86_LINKAGE_H */
61