| 1 | /* |
| 2 | * Kernel API extracted from Linux kernel headers. |
| 3 | */ |
| 4 | |
| 5 | #ifndef __KERNEL_API |
| 6 | #define __KERNEL_API |
| 7 | |
| 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 | |
| 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 | |
| 40 | #ifdef __i386__ |
| 41 | #define __NR_marker 333 |
| 42 | #define __NR_trace 334 |
| 43 | #elif defined(__x86_64__) |
| 44 | #define __NR_marker 295 |
| 45 | #define __NR_trace 296 |
| 46 | #else |
| 47 | #error "Unsupported architecture for userspace markers" |
| 48 | #endif |
| 49 | |
| 50 | #define sys_marker(...) syscall(__NR_marker, __VA_ARGS__) |
| 51 | #define sys_trace(...) syscall(__NR_trace, __VA_ARGS__) |
| 52 | |
| 53 | #ifdef __cplusplus |
| 54 | } /* end of extern "C" */ |
| 55 | #endif |
| 56 | |
| 57 | #endif |