55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2010 "Wu Zhangjin" <wuzhangjin@gmail.com>
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/sizes.h>
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int main(int argc, char *argv[])
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{
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unsigned long long vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr;
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struct stat sb;
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if (argc != 3) {
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fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n",
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argv[0]);
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return EXIT_FAILURE;
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}
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if (stat(argv[1], &sb) == -1) {
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perror("stat");
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return EXIT_FAILURE;
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}
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/* Convert hex characters to dec number */
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errno = 0;
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if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) {
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if (errno != 0)
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perror("sscanf");
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else
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fprintf(stderr, "No matching characters\n");
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return EXIT_FAILURE;
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}
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vmlinux_size = (uint64_t)sb.st_size;
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vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size;
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/*
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* Align with 64KB: KEXEC needs load sections to be aligned to PAGE_SIZE,
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* which may be as large as 64KB depending on the kernel configuration.
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*/
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vmlinuz_load_addr += (SZ_64K - vmlinux_size % SZ_64K);
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printf("0x%llx\n", vmlinuz_load_addr);
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return EXIT_SUCCESS;
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}
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