Create fileobject from physical memory at given address of size 64 KiB */
| 415 | |
| 416 | /* Create fileobject from physical memory at given address of size 64 KiB */ |
| 417 | static struct fileobject *read_physmem(size_t addr) |
| 418 | { |
| 419 | const int fd = open("/dev/mem", O_RDONLY); |
| 420 | const size_t size = 64 * 2 * KiB; |
| 421 | if (fd < 0) { |
| 422 | printerr("/dev/mem open failed: %s\n", strerror(errno)); |
| 423 | return NULL; |
| 424 | } |
| 425 | |
| 426 | const void *data = mmap(0, size, PROT_READ, MAP_SHARED, fd, addr); |
| 427 | if (data == MAP_FAILED) { |
| 428 | close(fd); |
| 429 | printerr("mmap failed: %s\n", strerror(errno)); |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | struct fileobject *fo = malloc_fo(size); |
| 434 | if (!fo) { |
| 435 | printerr("malloc failed\n"); |
| 436 | munmap((void *)data, size); |
| 437 | close(fd); |
| 438 | return NULL; |
| 439 | } |
| 440 | |
| 441 | memcpy(fo->data, data, size); |
| 442 | munmap((void *)data, size); |
| 443 | |
| 444 | if (close(fd)) { |
| 445 | printerr("/dev/mem close failed: %s\n", strerror(errno)); |
| 446 | free_fo(fo); |
| 447 | return NULL; |
| 448 | } |
| 449 | |
| 450 | return fo; |
| 451 | } |
| 452 | |
| 453 | /* Write fileobject contents to file */ |
| 454 | static int write_file(const char *filename, const struct fileobject *fo) |