Diff markup

Differences between /extra/sos_bsect.lds (Article 9) and /extra/sos_bsect.lds (Article 8)

 /* Copyright (C) 2004, David Decotigny             /* Copyright (C) 2004, David Decotigny
                                                    
    This program is free software; you can redi        This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU Genera        modify it under the terms of the GNU General Public License
    as published by the Free Software Foundatio        as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any lat        of the License, or (at your option) any later version.
                                                       
    This program is distributed in the hope tha        This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the         but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details        GNU General Public License for more details.
                                                       
    You should have received a copy of the GNU         You should have received a copy of the GNU General Public License
    along with this program; if not, write to t        along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 3        Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    USA.                                               USA. 
 */                                                 */
                                                    
 SECTIONS                                           SECTIONS
 {                                                  {
     /* ***************************************         /* ***********************************************
      * The bootsector is here. We link it agai          * The bootsector is here. We link it against the remaining of the kernel
      * in order to automatically figure out it          * in order to automatically figure out its size that must be loaded
      * from file to memory (see the load_size           * from file to memory (see the load_size definition below)
      */                                                 */
                                                    
     /* If we use one, we put the boot sector h         /* If we use one, we put the boot sector here. We don't set its
      * address to 0x7c000 (aka 0x7c00:0), sinc          * address to 0x7c000 (aka 0x7c00:0), since it reloads itself to
      * 0x9f000, causing the 0x7c000 address to          * 0x9f000, causing the 0x7c000 address to be meaningless too. So we
      * chose to pretend that the address is 0x          * chose to pretend that the address is 0x0, and to make a little
      * address arithmetic in bootsect.S */              * address arithmetic in bootsect.S */
     .bootsect 0x0 :                                    .bootsect 0x0 :
     {                                                  {
       /* The code for the boot sector goes her           /* The code for the boot sector goes here */
       *(.bootsect);                                      *(.bootsect);
                                                    
       /* The load_size symbol contains the siz           /* The load_size symbol contains the size of the area (in
        * sectors, aka 512 Bytes) that the boot            * sectors, aka 512 Bytes) that the boot sector should copy from
        * the disk. The bss section is not incl            * the disk. The bss section is not included since it uses 0
        * bytes on disk. This variable is short            * bytes on disk. This variable is short (16b) because it is used
        * by the bootsector in real mode, and t            * by the bootsector in real mode, and this is enough because
        * our boot sector cannot transfer more             * our boot sector cannot transfer more than 1264 sectors (see
        * bootsector sources) */                           * bootsector sources) */
       load_size = .;                                     load_size = .;
       SHORT((__e_load - __b_load + 511) >> 9);           SHORT((__e_load - __b_load + 511) >> 9);
       /* ---> This is equivalent to ceil( (__e           /* ---> This is equivalent to ceil( (__e_load - __b_load) / 512 ) */
                                                    
       /* At offsets 511 and 512, we set the bo           /* At offsets 511 and 512, we set the boot sector signature (AA55h) */
       . = 0x1fe;                                         . = 0x1fe;
       SHORT(0xAA55);                                     SHORT(0xAA55);
     }                                                  }
 }                                                  }
                                                    
                                                    
 /* This is to avoid a cut/paste here. Please n     /* This is to avoid a cut/paste here. Please notice that a multiboot
  * section WILL be inserted, which is NOT mand      * section WILL be inserted, which is NOT mandatory (we could have
  * removed it without getting into trouble). P      * removed it without getting into trouble). Please note however that
  * the *.bin files will NOT be multiboot compa      * the *.bin files will NOT be multiboot compatible (they are not in ELF
  * format): they are expected to be directly b      * format): they are expected to be directly booted by the BIOS (or
  * by the "chainloader" command of Grub). */        * by the "chainloader" command of Grub). */
 INCLUDE ../support/sos.lds                         INCLUDE ../support/sos.lds
                                                    
 /* We overload the entry set in sos.lds, just      /* We overload the entry set in sos.lds, just to avoid an ld warning */
 ENTRY(sos_main);                                   ENTRY(sos_main);