C++ (Cpp) KernelArgumentBlock::getauxval Examples

Example #1

File: linker_environ.cpp Project: epowers/arc

static void __init_AT_SECURE(KernelArgumentBlock& args) {
  // Check auxv for AT_SECURE first to see if program is setuid, setgid,
  // has file caps, or caused a SELinux/AppArmor domain transition.
  bool kernel_supplied_AT_SECURE;
  _AT_SECURE_value = args.getauxval(AT_SECURE, &kernel_supplied_AT_SECURE);

  // We don't support ancient kernels.
  if (!kernel_supplied_AT_SECURE) {
    const char* msg = "FATAL: kernel did not supply AT_SECURE\n";
    write(2, msg, strlen(msg));
    exit(EXIT_FAILURE);
  }
}

Example #2

File: libc_init_common.cpp Project: jackLi93/platform_bionic

void __libc_init_global_stack_chk_guard(KernelArgumentBlock& args) {
  // AT_RANDOM is a pointer to 16 bytes of randomness on the stack.
  // Take the first 4/8 for the -fstack-protector implementation.
  __stack_chk_guard = *reinterpret_cast<uintptr_t*>(args.getauxval(AT_RANDOM));
}