com32/mboot/solaris.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * ----------------------------------------------------------------------- */
  27
  28 /*
  29  * solaris.c
  30  *
  31  * Solaris DHCP hack
  32  *
  33  * Solaris uses a nonstandard hack to pass DHCP information from a netboot.
  34  */
  35
  36 #include "mboot.h"
  37 #include <syslinux/pxe.h>
  38 #include <syslinux/config.h>
  39
  40 bool kernel_is_solaris(const Elf32_Ehdr *eh)
  41 {
  42     return eh->e_ident[EI_OSABI] == 6;  /* ABI == Solaris */
  43 }
  44
  45 void mboot_solaris_dhcp_hack(void)
  46 {
  47     void *dhcpdata;
  48     size_t dhcplen;
  49
  50     if (syslinux_derivative_info()->c.filesystem != SYSLINUX_FS_PXELINUX)
  51         return;
  52
  53     if (!pxe_get_cached_info(PXENV_PACKET_TYPE_DHCP_ACK, &dhcpdata, &dhcplen)) {
  54         mbinfo.drives_addr = map_data(dhcpdata, dhcplen, 4, 0);
  55         if (mbinfo.drives_addr) {
  56             mbinfo.drives_length = dhcplen;
  57             mbinfo.boot_device = 0x20ffffff;
  58             mbinfo.flags =
  59                 (mbinfo.flags & ~MB_INFO_DRIVE_INFO) | MB_INFO_BOOTDEV;
  60         }
  61     }
  62 }