include/linux/crash_core.h

   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
  29 typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
  30
  31 void crash_update_vmcoreinfo_safecopy(void *ptr);
  32 void crash_save_vmcoreinfo(void);
  33 void arch_crash_save_vmcoreinfo(void);
  34 __printf(1, 2)
  35 void vmcoreinfo_append_str(const char *fmt, ...);
  36 phys_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
  60 extern u32 *vmcoreinfo_note;
  61
  62 Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
  63                           void *data, size_t data_len);
  64 void final_note(Elf_Word *buf);
  65
  66 int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
  67                 unsigned long long *crash_size, unsigned long long *crash_base);
  68 int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
  69                 unsigned long long *crash_size, unsigned long long *crash_base);
  70 int 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 */