1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2010 "Wu Zhangjin" <wuzhangjin@gmail.com> 4 */ 5 6 #include <sys/types.h> 7 #include <sys/stat.h> 8 #include <errno.h> 9 #include <stdint.h> 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include "../../../../include/linux/sizes.h" 13 14 int main(int argc, char *argv[]) 15 { 16 unsigned long long vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr; 17 struct stat sb; 18 19 if (argc != 3) { 20 fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n", 21 argv[0]); 22 return EXIT_FAILURE; 23 } 24 25 if (stat(argv[1], &sb) == -1) { 26 perror("stat"); 27 return EXIT_FAILURE; 28 } 29 30 /* Convert hex characters to dec number */ 31 errno = 0; 32 if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) { 33 if (errno != 0) 34 perror("sscanf"); 35 else 36 fprintf(stderr, "No matching characters\n"); 37 38 return EXIT_FAILURE; 39 } 40 41 vmlinux_size = (uint64_t)sb.st_size; 42 vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size; 43 44 /* 45 * Align with 64KB: KEXEC needs load sections to be aligned to PAGE_SIZE, 46 * which may be as large as 64KB depending on the kernel configuration. 47 */ 48 49 vmlinuz_load_addr += (SZ_64K - vmlinux_size % SZ_64K); 50 51 printf("0x%llx\n", vmlinuz_load_addr); 52 53 return EXIT_SUCCESS; 54 } 55