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1 | /* |
2 | * Kernel API extracted from Linux kernel headers. |
3 | */ |
4 | |
5 | #ifndef __KERNEL_API |
6 | #define __KERNEL_API |
7 | |
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8 | #include <errno.h> |
9 | #include <syscall.h> |
10 | #include <string.h> |
11 | #include <stdint.h> |
12 | |
13 | #ifdef __cplusplus |
14 | extern "C" { |
15 | #endif |
16 | |
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17 | #define DECLARE_IMV(type, name) extern __typeof__(type) name##__imv |
18 | #define DEFINE_IMV(type, name) __typeof__(type) name##__imv |
19 | |
20 | #define likely(x) __builtin_expect(!!(x), 1) |
21 | #define unlikely(x) __builtin_expect(!!(x), 0) |
22 | |
23 | /** |
24 | * imv_read - read immediate variable |
25 | * @name: immediate value name |
26 | * |
27 | * Reads the value of @name. |
28 | */ |
29 | #define imv_read(name) _imv_read(name) |
30 | |
31 | /** |
32 | * _imv_read - Read immediate value with standard memory load. |
33 | * @name: immediate value name |
34 | * |
35 | * Force a data read of the immediate value instead of the immediate value |
36 | * based mechanism. Useful for __init and __exit section data read. |
37 | */ |
38 | #define _imv_read(name) (name##__imv) |
39 | |
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40 | #ifdef __i386__ |
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41 | #define __NR_marker 333 |
42 | #define __NR_trace 334 |
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43 | #elif defined(__x86_64__) |
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44 | #define __NR_marker 295 |
45 | #define __NR_trace 296 |
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46 | #else |
47 | #error "Unsupported architecture for userspace markers" |
48 | #endif |
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49 | |
50 | #define sys_marker(...) syscall(__NR_marker, __VA_ARGS__) |
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51 | #define sys_trace(...) syscall(__NR_trace, __VA_ARGS__) |
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52 | |
53 | #ifdef __cplusplus |
54 | } /* end of extern "C" */ |
55 | #endif |
56 | |
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57 | #endif |