This commit continues the PR #111

- Allow to register handler separately for invalid memory access
- Add new memory events for hooking:
   - UC_MEM_READ_INVALID, UC_MEM_WRITE_INVALID, UC_MEM_FETCH_INVALID
   - UC_HOOK_MEM_READ_PROT, UC_HOOK_MEM_WRITE_PROT, UC_HOOK_MEM_FETCH_PROT
- Rename UC_ERR_EXEC_PROT to UC_ERR_FETCH_PROT
- Change API uc_hook_add() so event type @type can be combined from hooking types

qemu/cputlb.c

@@ -300,7 +300,7 @@ tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr)
                  (addr & TARGET_PAGE_MASK))) {
         cpu_ldub_code(env1, addr);
         //check for NX related error from softmmu
-        if (env1->invalid_error == UC_ERR_EXEC_PROT) {
+        if (env1->invalid_error == UC_ERR_FETCH_PROT) {
             env1->invalid_error = UC_ERR_CODE_INVALID;
             return -1;
         }