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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142// SPDX-License-Identifier: GPL-2.0-only#include <linux/kernel.h>#include <linux/crash_dump.h>#include <linux/init.h>#include <linux/errno.h>#include <linux/export.h>
/* * stores the physical address of elf header of crash image * * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by * is_kdump_kernel() to determine if we are booting after a panic. Hence put * it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. */unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;EXPORT_SYMBOL_GPL(elfcorehdr_addr);
/* * stores the size of elf header of crash image */unsigned long long elfcorehdr_size;
/* * elfcorehdr= specifies the location of elf core header stored by the crashed * kernel. This option will be passed by kexec loader to the capture kernel. * * Syntax: elfcorehdr=[size[KMG]@]offset[KMG] */static int __init setup_elfcorehdr(char *arg){ char *end; if (!arg) return -EINVAL; elfcorehdr_addr = memparse(arg, &end); if (*end == '@') { elfcorehdr_size = elfcorehdr_addr; elfcorehdr_addr = memparse(end + 1, &end); } return end > arg ? 0 : -EINVAL;}early_param("elfcorehdr", setup_elfcorehdr);