Xz Backdoor, Cybersecurity.
main(int argc, char *argv[]) { char *env; printf("Do Main Func.\n"); env = getenv("FOO"); if (env) printf("do test FOO = %s\n", env); foo(); return 0; } The above code snippet first defines an IFUNC feature for the foo function: void foo() __attribute__((__ifunc__("foo_resolver"))); The code