1 #ifndef LINUX_CRASH_DUMP_H 2 #define LINUX_CRASH_DUMP_H 3 4 #ifdef CONFIG_CRASH_DUMP 5 #include <linux/kexec.h> 6 #include <linux/smp_lock.h> 7 #include <linux/device.h> 8 #include <linux/proc_fs.h> 9 10 #define ELFCORE_ADDR_MAX (-1ULL) 11 12 #ifdef CONFIG_PROC_VMCORE 13 extern unsigned long long elfcorehdr_addr; 14 #else 15 static const unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX; 16 #endif 17 18 extern ssize_t copy_oldmem_page(unsigned long, char *, size_t, 19 unsigned long, int); 20 extern const struct file_operations proc_vmcore_operations; 21 extern struct proc_dir_entry *proc_vmcore; 22 23 /* Architecture code defines this if there are other possible ELF 24 * machine types, e.g. on bi-arch capable hardware. */ 25 #ifndef vmcore_elf_check_arch_cross 26 #define vmcore_elf_check_arch_cross(x) 0 27 #endif 28 29 #define vmcore_elf_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x)) 30 31 static inline int is_kdump_kernel(void) 32 { 33 return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0; 34 } 35 #else /* !CONFIG_CRASH_DUMP */ 36 static inline int is_kdump_kernel(void) { return 0; } 37 #endif /* CONFIG_CRASH_DUMP */ 38 39 extern unsigned long saved_max_pfn; 40 #endif /* LINUX_CRASHDUMP_H */ 41