Blame view
kernel/crash_dump.c
1.24 KB
93a72052b crash_dump: expor... |
1 2 3 4 |
#include <linux/kernel.h> #include <linux/crash_dump.h> #include <linux/init.h> #include <linux/errno.h> |
9984de1a5 kernel: Map most ... |
5 |
#include <linux/export.h> |
93a72052b crash_dump: expor... |
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
/* * If we have booted due to a crash, max_pfn will be a very low value. We need * to know the amount of memory that the previous kernel used. */ unsigned long saved_max_pfn; /* * 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; /* |
d3bf37955 [S390] kdump: Add... |
23 24 25 26 27 |
* stores the size of elf header of crash image */ unsigned long long elfcorehdr_size; /* |
93a72052b crash_dump: expor... |
28 29 |
* 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. |
d3bf37955 [S390] kdump: Add... |
30 31 |
* * Syntax: elfcorehdr=[size[KMG]@]offset[KMG] |
93a72052b crash_dump: expor... |
32 33 34 35 36 37 38 |
*/ static int __init setup_elfcorehdr(char *arg) { char *end; if (!arg) return -EINVAL; elfcorehdr_addr = memparse(arg, &end); |
d3bf37955 [S390] kdump: Add... |
39 40 41 42 |
if (*end == '@') { elfcorehdr_size = elfcorehdr_addr; elfcorehdr_addr = memparse(end + 1, &end); } |
93a72052b crash_dump: expor... |
43 44 45 |
return end > arg ? 0 : -EINVAL; } early_param("elfcorehdr", setup_elfcorehdr); |