include/asm-x86_64/diskdump.h

   1 /*
   2  * include/asm-x86_64/diskdump.h
   3  *
   4  * Copyright (C) Hitachi, Ltd. 2004
   5  * Written by Satoshi Oshima (oshima@sdl.hitachi.co.jp)
   6  *
   7  * Derived from include/asm-i386/diskdump.h
   8  * Copyright (c) 2004 FUJITSU LIMITED
   9  * Copyright (c) 2003 Red Hat, Inc. All rights reserved.
  10  *
  11  */
  12
  13 #ifndef _ASM_X86_64_DISKDUMP_H
  14 #define _ASM_X86_64_DISKDUMP_H
  15
  16 #ifdef __KERNEL__
  17
  18 #include <linux/elf.h>
  19 #include <asm/crashdump.h>
  20
  21 const static int platform_supports_diskdump = 1;
  22
  23 struct disk_dump_sub_header {
  24         elf_gregset_t           elf_regs;
  25 };
  26
  27 #define size_of_sub_header()    ((sizeof(struct disk_dump_sub_header) + PAGE_SIZE - 1) / DUMP_BLOCK_SIZE)
  28
  29 #define write_sub_header()                                              \
  30 ({                                                                      \
  31         int ret;                                                        \
  32                                                                         \
  33         ELF_CORE_COPY_REGS(dump_sub_header.elf_regs, (&myregs));        \
  34         clear_page(scratch);                                            \
  35         memcpy(scratch, &dump_sub_header, sizeof(dump_sub_header));     \
  36                                                                         \
  37         if ((ret = write_blocks(dump_part, 2, scratch, 1)) >= 0)        \
  38                 ret = 1; /* size of sub header in page */;              \
  39         ret;                                                            \
  40 })
  41
  42 #endif /* __KERNEL__ */
  43
  44 #endif /* _ASM_X86_64_DISKDUMP_H */