Linux Kernel  3.7.1
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linkage.h
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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