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 */ 74