| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef LINUX_VMCORE_INFO_H |
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| 3 | #define LINUX_VMCORE_INFO_H |
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| 4 | |
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| 5 | #include <linux/linkage.h> |
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| 6 | #include <linux/elfcore.h> |
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| 7 | #include <linux/elf.h> |
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| 8 | |
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| 9 | #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4) |
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| 10 | #define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(NN_PRSTATUS), 4) |
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| 11 | #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4) |
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| 12 | |
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| 13 | /* |
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| 14 | * The per-cpu notes area is a list of notes terminated by a "NULL" |
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| 15 | * note header. For kdump, the code in vmcore.c runs in the context |
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| 16 | * of the second kernel to combine them into one note. |
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| 17 | */ |
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| 18 | #define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
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| 19 | CRASH_CORE_NOTE_NAME_BYTES + \ |
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| 20 | CRASH_CORE_NOTE_DESC_BYTES) |
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| 21 | |
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| 22 | #define VMCOREINFO_BYTES PAGE_SIZE |
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| 23 | #define VMCOREINFO_NOTE_NAME "VMCOREINFO" |
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| 24 | #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4) |
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| 25 | #define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
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| 26 | VMCOREINFO_NOTE_NAME_BYTES + \ |
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| 27 | VMCOREINFO_BYTES) |
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| 28 | |
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| 29 | typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4]; |
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| 30 | /* Per cpu memory for storing cpu states in case of system crash. */ |
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| 31 | extern note_buf_t __percpu *crash_notes; |
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| 32 | |
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| 33 | void crash_update_vmcoreinfo_safecopy(void *ptr); |
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| 34 | void crash_save_vmcoreinfo(void); |
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| 35 | void arch_crash_save_vmcoreinfo(void); |
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| 36 | __printf(1, 2) |
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| 37 | void vmcoreinfo_append_str(const char *fmt, ...); |
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| 38 | phys_addr_t paddr_vmcoreinfo_note(void); |
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| 39 | |
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| 40 | #define VMCOREINFO_OSRELEASE(value) \ |
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| 41 | vmcoreinfo_append_str("OSRELEASE=%s\n", value) |
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| 42 | #define VMCOREINFO_BUILD_ID() \ |
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| 43 | ({ \ |
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| 44 | static_assert(sizeof(vmlinux_build_id) == 20); \ |
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| 45 | vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \ |
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| 46 | }) |
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| 47 | |
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| 48 | #define VMCOREINFO_PAGESIZE(value) \ |
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| 49 | vmcoreinfo_append_str("PAGESIZE=%ld\n", value) |
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| 50 | #define VMCOREINFO_SYMBOL(name) \ |
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| 51 | vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name) |
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| 52 | #define VMCOREINFO_SYMBOL_ARRAY(name) \ |
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| 53 | vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name) |
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| 54 | #define VMCOREINFO_SIZE(name) \ |
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| 55 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
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| 56 | (unsigned long)sizeof(name)) |
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| 57 | #define VMCOREINFO_STRUCT_SIZE(name) \ |
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| 58 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
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| 59 | (unsigned long)sizeof(struct name)) |
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| 60 | #define VMCOREINFO_OFFSET(name, field) \ |
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| 61 | vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
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| 62 | (unsigned long)offsetof(struct name, field)) |
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| 63 | #define VMCOREINFO_TYPE_OFFSET(name, field) \ |
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| 64 | vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
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| 65 | (unsigned long)offsetof(name, field)) |
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| 66 | #define VMCOREINFO_LENGTH(name, value) \ |
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| 67 | vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value) |
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| 68 | #define VMCOREINFO_NUMBER(name) \ |
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| 69 | vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name) |
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| 70 | #define VMCOREINFO_CONFIG(name) \ |
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| 71 | vmcoreinfo_append_str("CONFIG_%s=y\n", #name) |
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| 72 | |
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| 73 | extern unsigned char *vmcoreinfo_data; |
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| 74 | extern size_t vmcoreinfo_size; |
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| 75 | extern u32 *vmcoreinfo_note; |
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| 76 | |
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| 77 | Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, |
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| 78 | void *data, size_t data_len); |
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| 79 | void final_note(Elf_Word *buf); |
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| 80 | #endif /* LINUX_VMCORE_INFO_H */ |
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| 81 | |
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