eBPF内存操作

基于LLVM内置函数来操作内存

#ifndef memmove
#define memmove(dest, src, n)  __builtin_memmove((dest), (src), (n))
#endif

#ifndef memset
#define memset(dest, chr, n)   __builtin_memset((dest), (chr), (n))
#endif

#ifndef memcpy
#define memcpy(dest, src, n)   __builtin_memcpy((dest), (src), (n))
#endif