| /** |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #define MAX_ENTRIES (1024) |
| #define INITIAL_VAL (0xBE) |
| |
| #define DISABLE_MEM_ACCESS(mem, size)\ |
| mprotect((char *) mem, size, PROT_NONE); |
| |
| #define ENABLE_MEM_ACCESS(mem, size)\ |
| mprotect((char *) mem, size, PROT_READ | PROT_WRITE); |
| |
| typedef struct _map_struct_t { |
| void *start_ptr; |
| void *mem_ptr; |
| int num_pages; |
| } map_struct_t; |
| |
| static void* (*real_memalign)(size_t, size_t) = NULL; |
| static void (*real_free)(void *) = NULL; |
| static int s_memutils_initialized = 0; |
| static int s_mem_map_index = 0; |
| static struct sigaction new_sa, old_sa; |
| map_struct_t s_mem_map[MAX_ENTRIES]; |
| #if (!(defined CHECK_OVERFLOW) && !(defined CHECK_UNDERFLOW)) |
| #error "CHECK MACROS NOT DEFINED" |
| #endif |
