1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef LINUX_VMCORE_INFO_H |
3 | #define LINUX_VMCORE_INFO_H |
4 | |
5 | #include <linux/linkage.h> |
6 | #include <linux/elfcore.h> |
7 | #include <linux/elf.h> |
8 | |
9 | #define CRASH_CORE_NOTE_NAME "CORE" |
10 | #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4) |
11 | #define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4) |
12 | #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4) |
13 | |
14 | /* |
15 | * The per-cpu notes area is a list of notes terminated by a "NULL" |
16 | * note header. For kdump, the code in vmcore.c runs in the context |
17 | * of the second kernel to combine them into one note. |
18 | */ |
19 | #define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
20 | CRASH_CORE_NOTE_NAME_BYTES + \ |
21 | CRASH_CORE_NOTE_DESC_BYTES) |
22 | |
23 | #define VMCOREINFO_BYTES PAGE_SIZE |
24 | #define VMCOREINFO_NOTE_NAME "VMCOREINFO" |
25 | #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4) |
26 | #define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
27 | VMCOREINFO_NOTE_NAME_BYTES + \ |
28 | VMCOREINFO_BYTES) |
29 | |
30 | typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4]; |
31 | /* Per cpu memory for storing cpu states in case of system crash. */ |
32 | extern note_buf_t __percpu *crash_notes; |
33 | |
34 | void crash_update_vmcoreinfo_safecopy(void *ptr); |
35 | void crash_save_vmcoreinfo(void); |
36 | void arch_crash_save_vmcoreinfo(void); |
37 | __printf(1, 2) |
38 | void vmcoreinfo_append_str(const char *fmt, ...); |
39 | phys_addr_t paddr_vmcoreinfo_note(void); |
40 | |
41 | #define VMCOREINFO_OSRELEASE(value) \ |
42 | vmcoreinfo_append_str("OSRELEASE=%s\n", value) |
43 | #define VMCOREINFO_BUILD_ID() \ |
44 | ({ \ |
45 | static_assert(sizeof(vmlinux_build_id) == 20); \ |
46 | vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \ |
47 | }) |
48 | |
49 | #define VMCOREINFO_PAGESIZE(value) \ |
50 | vmcoreinfo_append_str("PAGESIZE=%ld\n", value) |
51 | #define VMCOREINFO_SYMBOL(name) \ |
52 | vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name) |
53 | #define VMCOREINFO_SYMBOL_ARRAY(name) \ |
54 | vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name) |
55 | #define VMCOREINFO_SIZE(name) \ |
56 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
57 | (unsigned long)sizeof(name)) |
58 | #define VMCOREINFO_STRUCT_SIZE(name) \ |
59 | vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
60 | (unsigned long)sizeof(struct name)) |
61 | #define VMCOREINFO_OFFSET(name, field) \ |
62 | vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
63 | (unsigned long)offsetof(struct name, field)) |
64 | #define VMCOREINFO_TYPE_OFFSET(name, field) \ |
65 | vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
66 | (unsigned long)offsetof(name, field)) |
67 | #define VMCOREINFO_LENGTH(name, value) \ |
68 | vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value) |
69 | #define VMCOREINFO_NUMBER(name) \ |
70 | vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name) |
71 | #define VMCOREINFO_CONFIG(name) \ |
72 | vmcoreinfo_append_str("CONFIG_%s=y\n", #name) |
73 | |
74 | extern unsigned char *vmcoreinfo_data; |
75 | extern size_t vmcoreinfo_size; |
76 | extern u32 *vmcoreinfo_note; |
77 | |
78 | Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, |
79 | void *data, size_t data_len); |
80 | void final_note(Elf_Word *buf); |
81 | #endif /* LINUX_VMCORE_INFO_H */ |
82 | |