Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef LINUX_CRASH_CORE_H
2#define LINUX_CRASH_CORE_H
3
4#include <linux/linkage.h>
5#include <linux/elfcore.h>
6#include <linux/elf.h>
7
8#define CRASH_CORE_NOTE_NAME "CORE"
9#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
10#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
11#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
12
13/*
14 * The per-cpu notes area is a list of notes terminated by a "NULL"
15 * note header. For kdump, the code in vmcore.c runs in the context
16 * of the second kernel to combine them into one note.
17 */
18#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
19 CRASH_CORE_NOTE_NAME_BYTES + \
20 CRASH_CORE_NOTE_DESC_BYTES)
21
22#define VMCOREINFO_BYTES PAGE_SIZE
23#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
24#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
25#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
26 VMCOREINFO_NOTE_NAME_BYTES + \
27 VMCOREINFO_BYTES)
28
29typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
30
31void crash_update_vmcoreinfo_safecopy(void *ptr);
32void crash_save_vmcoreinfo(void);
33void arch_crash_save_vmcoreinfo(void);
34__printf(1, 2)
35void vmcoreinfo_append_str(const char *fmt, ...);
36phys_addr_t paddr_vmcoreinfo_note(void);
37
38#define VMCOREINFO_OSRELEASE(value) \
39 vmcoreinfo_append_str("OSRELEASE=%s\n", value)
40#define VMCOREINFO_PAGESIZE(value) \
41 vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
42#define VMCOREINFO_SYMBOL(name) \
43 vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
44#define VMCOREINFO_SIZE(name) \
45 vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
46 (unsigned long)sizeof(name))
47#define VMCOREINFO_STRUCT_SIZE(name) \
48 vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
49 (unsigned long)sizeof(struct name))
50#define VMCOREINFO_OFFSET(name, field) \
51 vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
52 (unsigned long)offsetof(struct name, field))
53#define VMCOREINFO_LENGTH(name, value) \
54 vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
55#define VMCOREINFO_NUMBER(name) \
56 vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
57#define VMCOREINFO_CONFIG(name) \
58 vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
59
60extern u32 *vmcoreinfo_note;
61
62Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
63 void *data, size_t data_len);
64void final_note(Elf_Word *buf);
65
66int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
67 unsigned long long *crash_size, unsigned long long *crash_base);
68int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
69 unsigned long long *crash_size, unsigned long long *crash_base);
70int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
71 unsigned long long *crash_size, unsigned long long *crash_base);
72
73#endif /* LINUX_CRASH_CORE_H */