crash_core.h 3.4 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef LINUX_CRASH_CORE_H
  3. #define LINUX_CRASH_CORE_H
  4. #include <linux/linkage.h>
  5. #include <linux/elfcore.h>
  6. #include <linux/elf.h>
  7. #define CRASH_CORE_NOTE_NAME "CORE"
  8. #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
  9. #define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
  10. #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
  11. /*
  12. * The per-cpu notes area is a list of notes terminated by a "NULL"
  13. * note header. For kdump, the code in vmcore.c runs in the context
  14. * of the second kernel to combine them into one note.
  15. */
  16. #define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
  17. CRASH_CORE_NOTE_NAME_BYTES + \
  18. CRASH_CORE_NOTE_DESC_BYTES)
  19. #define VMCOREINFO_BYTES PAGE_SIZE
  20. #define VMCOREINFO_NOTE_NAME "VMCOREINFO"
  21. #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
  22. #define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
  23. VMCOREINFO_NOTE_NAME_BYTES + \
  24. VMCOREINFO_BYTES)
  25. typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
  26. void crash_update_vmcoreinfo_safecopy(void *ptr);
  27. void crash_save_vmcoreinfo(void);
  28. void arch_crash_save_vmcoreinfo(void);
  29. __printf(1, 2)
  30. void vmcoreinfo_append_str(const char *fmt, ...);
  31. phys_addr_t paddr_vmcoreinfo_note(void);
  32. #define VMCOREINFO_OSRELEASE(value) \
  33. vmcoreinfo_append_str("OSRELEASE=%s\n", value)
  34. #define VMCOREINFO_BUILD_ID(value) \
  35. vmcoreinfo_append_str("BUILD-ID=%s\n", value)
  36. #define VMCOREINFO_PAGESIZE(value) \
  37. vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
  38. #define VMCOREINFO_SYMBOL(name) \
  39. vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
  40. #define VMCOREINFO_SYMBOL_ARRAY(name) \
  41. vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
  42. #define VMCOREINFO_SIZE(name) \
  43. vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
  44. (unsigned long)sizeof(name))
  45. #define VMCOREINFO_STRUCT_SIZE(name) \
  46. vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
  47. (unsigned long)sizeof(struct name))
  48. #define VMCOREINFO_OFFSET(name, field) \
  49. vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
  50. (unsigned long)offsetof(struct name, field))
  51. #define VMCOREINFO_TYPE_OFFSET(name, field) \
  52. vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
  53. (unsigned long)offsetof(name, field))
  54. #define VMCOREINFO_LENGTH(name, value) \
  55. vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
  56. #define VMCOREINFO_NUMBER(name) \
  57. vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
  58. #define VMCOREINFO_CONFIG(name) \
  59. vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
  60. extern unsigned char *vmcoreinfo_data;
  61. extern size_t vmcoreinfo_size;
  62. extern u32 *vmcoreinfo_note;
  63. /* raw contents of kernel .notes section */
  64. extern const void __start_notes __weak;
  65. extern const void __stop_notes __weak;
  66. Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
  67. void *data, size_t data_len);
  68. void final_note(Elf_Word *buf);
  69. int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
  70. unsigned long long *crash_size, unsigned long long *crash_base);
  71. int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
  72. unsigned long long *crash_size, unsigned long long *crash_base);
  73. int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
  74. unsigned long long *crash_size, unsigned long long *crash_base);
  75. #endif /* LINUX_CRASH_CORE_H */