/* Returns 1 if Data Execution Prevention is present and working */
static int NaClAttemptToExecuteData()
{
int result;
char *thunk_buffer = malloc(64);
nacl_void_thunk thunk;
/* d'b: small fixes */
if(thunk_buffer == NULL) return 0;
thunk = NaClGenerateThunk(thunk_buffer, 64);
setup_signals();
if(0 == sigsetjmp(try_state, 1))
{
thunk();
result = 0;
}
else
{
result = 1;
}
restore_signals();
free(thunk_buffer);
return result;
}
int NaClAttemptToExecuteDataAtAddr(char *thunk_buffer, size_t size) {
int result;
MachExceptionHandlerData saved_handlers;
nacl_void_thunk thunk = NaClGenerateThunk(thunk_buffer, size);
setup_signals();
DisableMachExceptionHandler(&saved_handlers);
if (0 == sigsetjmp(try_state, 1)) {
thunk();
result = 0;
} else {
result = 1;
}
EnableMachExceptionHandler(&saved_handlers);
restore_signals();
return result;
}
