49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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/**
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* @file detour.h
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* @brief Detour hooking library header
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* @author 8dcc
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*
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* https://github.com/8dcc/detour-lib
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*/
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#ifndef DETOUR_H_
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#define DETOUR_H_
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#ifdef __i386__
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typedef uint32_t detour_ptr_t;
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#define JMP_SZ_ 7 /* Size of jmp instructions in 32bit */
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#else
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typedef uint64_t detour_ptr_t;
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#define JMP_SZ_ 12 /* Size of jmp instructions in 64bit */
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#endif
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typedef struct {
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bool detoured;
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void* orig;
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void* hook;
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uint8_t jmp_bytes[JMP_SZ_];
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uint8_t saved_bytes[JMP_SZ_];
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} detour_data_t;
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/*----------------------------------------------------------------------------*/
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void detour_init(detour_data_t* data, void* orig, void* hook);
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bool detour_add(detour_data_t* d);
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bool detour_del(detour_data_t* d);
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/*----------------------------------------------------------------------------*/
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/* Declare the type for the original function */
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#define DECL_DETOUR_TYPE(funcRet, funcName, ...) \
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typedef funcRet (*funcName##_t)(__VA_ARGS__);
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/* Reset original bytes, call original, detour again. detourData is NOT a ptr */
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#define CALL_ORIGINAL(detourData, funcName, ...) \
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{ \
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detour_del(&detourData); \
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((funcName##_t)detourData.orig)(__VA_ARGS__); \
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detour_add(&detourData); \
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}
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#endif /* DETOUR_H_ */
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