| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef LINUX_CRASH_CORE_H |
| #define LINUX_CRASH_CORE_H |
| |
| #include <linux/linkage.h> |
| #include <linux/elfcore.h> |
| #include <linux/elf.h> |
| |
| #define CRASH_CORE_NOTE_NAME "CORE" |
| #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4) |
| #define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4) |
| #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4) |
| |
| /* |
| * The per-cpu notes area is a list of notes terminated by a "NULL" |
| * note header. For kdump, the code in vmcore.c runs in the context |
| * of the second kernel to combine them into one note. |
| */ |
| #define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
| CRASH_CORE_NOTE_NAME_BYTES + \ |
| CRASH_CORE_NOTE_DESC_BYTES) |
| |
| #define VMCOREINFO_BYTES PAGE_SIZE |
| #define VMCOREINFO_NOTE_NAME "VMCOREINFO" |
| #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4) |
| #define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \ |
| VMCOREINFO_NOTE_NAME_BYTES + \ |
| VMCOREINFO_BYTES) |
| |
| typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4]; |
| |
| void crash_update_vmcoreinfo_safecopy(void *ptr); |
| void crash_save_vmcoreinfo(void); |
| void arch_crash_save_vmcoreinfo(void); |
| __printf(1, 2) |
| void vmcoreinfo_append_str(const char *fmt, ...); |
| phys_addr_t paddr_vmcoreinfo_note(void); |
| |
| #define VMCOREINFO_OSRELEASE(value) \ |
| vmcoreinfo_append_str("OSRELEASE=%s\n", value) |
| #define VMCOREINFO_BUILD_ID() \ |
| ({ \ |
| static_assert(sizeof(vmlinux_build_id) == 20); \ |
| vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \ |
| }) |
| |
| #define VMCOREINFO_PAGESIZE(value) \ |
| vmcoreinfo_append_str("PAGESIZE=%ld\n", value) |
| #define VMCOREINFO_SYMBOL(name) \ |
| vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name) |
| #define VMCOREINFO_SYMBOL_ARRAY(name) \ |
| vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name) |
| #define VMCOREINFO_SIZE(name) \ |
| vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
| (unsigned long)sizeof(name)) |
| #define VMCOREINFO_STRUCT_SIZE(name) \ |
| vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \ |
| (unsigned long)sizeof(struct name)) |
| #define VMCOREINFO_OFFSET(name, field) \ |
| vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
| (unsigned long)offsetof(struct name, field)) |
| #define VMCOREINFO_TYPE_OFFSET(name, field) \ |
| vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \ |
| (unsigned long)offsetof(name, field)) |
| #define VMCOREINFO_LENGTH(name, value) \ |
| vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value) |
| #define VMCOREINFO_NUMBER(name) \ |
| vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name) |
| #define VMCOREINFO_CONFIG(name) \ |
| vmcoreinfo_append_str("CONFIG_%s=y\n", #name) |
| |
| extern unsigned char *vmcoreinfo_data; |
| extern size_t vmcoreinfo_size; |
| extern u32 *vmcoreinfo_note; |
| |
| Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, |
| void *data, size_t data_len); |
| void final_note(Elf_Word *buf); |
| |
| int __init parse_crashkernel(char *cmdline, unsigned long long system_ram, |
| unsigned long long *crash_size, unsigned long long *crash_base); |
| int parse_crashkernel_high(char *cmdline, unsigned long long system_ram, |
| unsigned long long *crash_size, unsigned long long *crash_base); |
| int parse_crashkernel_low(char *cmdline, unsigned long long system_ram, |
| unsigned long long *crash_size, unsigned long long *crash_base); |
| |
| #endif /* LINUX_CRASH_CORE_H */ |