cregit-Linux how code gets into the kernel

Release 4.14 include/linux/crash_core.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef LINUX_CRASH_CORE_H

#define LINUX_CRASH_CORE_H

#include <linux/linkage.h>
#include <linux/elfcore.h>
#include <linux/elf.h>


#define CRASH_CORE_NOTE_NAME	   "CORE"

#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)

#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)

#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)

/*
 * The per-cpu notes area is a list of notes terminated by a "NULL"
 * note header.  For kdump, the code in vmcore.c runs in the context
 * of the second kernel to combine them into one note.
 */

#define CRASH_CORE_NOTE_BYTES	   ((CRASH_CORE_NOTE_HEAD_BYTES * 2) +     \
                                     CRASH_CORE_NOTE_NAME_BYTES +       \
                                     CRASH_CORE_NOTE_DESC_BYTES)


#define VMCOREINFO_BYTES	   PAGE_SIZE

#define VMCOREINFO_NOTE_NAME	   "VMCOREINFO"

#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)

#define VMCOREINFO_NOTE_SIZE	   ((CRASH_CORE_NOTE_HEAD_BYTES * 2) +     \
                                     VMCOREINFO_NOTE_NAME_BYTES +       \
                                     VMCOREINFO_BYTES)


typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];

void crash_update_vmcoreinfo_safecopy(void *ptr);
void crash_save_vmcoreinfo(void);
void arch_crash_save_vmcoreinfo(void);
__printf(1, 2)
void vmcoreinfo_append_str(const char *fmt, ...);
phys_addr_t paddr_vmcoreinfo_note(void);


#define VMCOREINFO_OSRELEASE(value) \
	vmcoreinfo_append_str("OSRELEASE=%s\n", value)

#define VMCOREINFO_PAGESIZE(value) \
	vmcoreinfo_append_str("PAGESIZE=%ld\n", value)

#define VMCOREINFO_SYMBOL(name) \
	vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)

#define VMCOREINFO_SIZE(name) \
	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
                              (unsigned long)sizeof(name))

#define VMCOREINFO_STRUCT_SIZE(name) \
	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
                              (unsigned long)sizeof(struct name))

#define VMCOREINFO_OFFSET(name, field) \
	vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
                              (unsigned long)offsetof(struct name, field))

#define VMCOREINFO_LENGTH(name, value) \
	vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)

#define VMCOREINFO_NUMBER(name) \
	vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)

#define VMCOREINFO_CONFIG(name) \
	vmcoreinfo_append_str("CONFIG_%s=y\n", #name)

extern u32 *vmcoreinfo_note;

Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
			  void *data, size_t data_len);
void final_note(Elf_Word *buf);

int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
		unsigned long long *crash_size, unsigned long long *crash_base);
int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
		unsigned long long *crash_size, unsigned long long *crash_base);
int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
		unsigned long long *crash_size, unsigned long long *crash_base);

#endif /* LINUX_CRASH_CORE_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Hari Bathini28595.96%233.33%
Xunlei Pang103.37%233.33%
Michael Holzheu10.34%116.67%
Greg Kroah-Hartman10.34%116.67%
Total297100.00%6100.00%
Directory: include/linux
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