include/asm-i386/diskdump.h

   1 #ifndef _ASM_I386_DISKDUMP_H
   2 #define _ASM_I386_DISKDUMP_H
   3
   4 /*
   5  * linux/include/asm-i386/diskdump.h
   6  *
   7  * Copyright (c) 2004 FUJITSU LIMITED
   8  * Copyright (c) 2003 Red Hat, Inc. All rights reserved.
   9  */
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  */
  26
  27 #ifdef __KERNEL__
  28
  29 #include <linux/elf.h>
  30 #include <asm/crashdump.h>
  31
  32 const static int platform_supports_diskdump = 1;
  33
  34 struct disk_dump_sub_header {
  35         elf_gregset_t           elf_regs;
  36 };
  37
  38 #define size_of_sub_header()    ((sizeof(struct disk_dump_sub_header) + PAGE_SIZE - 1) / DUMP_BLOCK_SIZE)
  39
  40 #define write_sub_header()                                              \
  41 ({                                                                      \
  42         int ret;                                                        \
  43                                                                         \
  44         ELF_CORE_COPY_REGS(dump_sub_header.elf_regs, (&myregs));        \
  45         clear_page(scratch);                                            \
  46         memcpy(scratch, &dump_sub_header, sizeof(dump_sub_header));     \
  47                                                                         \
  48         if ((ret = write_blocks(dump_part, 2, scratch, 1)) >= 0)        \
  49                 ret = 1; /* size of sub header in page */;              \
  50         ret;                                                            \
  51 })
  52
  53 #endif /* __KERNEL__ */
  54
  55 #endif /* _ASM_I386_DISKDUMP_H */