grub-core/commands/efi/lsefisystab.c

   1 /* lsefisystab.c  - Display EFI systab.  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include <grub/types.h>
  20 #include <grub/mm.h>
  21 #include <grub/dl.h>
  22 #include <grub/misc.h>
  23 #include <grub/normal.h>
  24 #include <grub/charset.h>
  25 #include <grub/efi/api.h>
  26 #include <grub/efi/efi.h>
  27
  28 GRUB_MOD_LICENSE ("GPLv3+");
  29
  30 struct guid_mapping
  31 {
  32   grub_efi_guid_t guid;
  33   const char *name;
  34 };
  35
  36 static const struct guid_mapping guid_mappings[] =
  37   {
  38     { GRUB_EFI_ACPI_20_TABLE_GUID, "ACPI-2.0"},
  39     { GRUB_EFI_ACPI_TABLE_GUID, "ACPI-1.0"},
  40     { GRUB_EFI_CRC32_GUIDED_SECTION_EXTRACTION_GUID,
  41       "CRC32 GUIDED SECTION EXTRACTION"},
  42     { GRUB_EFI_DEBUG_IMAGE_INFO_TABLE_GUID, "DEBUG IMAGE INFO"},
  43     { GRUB_EFI_DXE_SERVICES_TABLE_GUID, "DXE SERVICES"},
  44     { GRUB_EFI_HCDP_TABLE_GUID, "HCDP"},
  45     { GRUB_EFI_HOB_LIST_GUID, "HOB LIST"},
  46     { GRUB_EFI_LZMA_CUSTOM_DECOMPRESS_GUID, "LZMA CUSTOM DECOMPRESS"},
  47     { GRUB_EFI_MEMORY_TYPE_INFORMATION_GUID, "MEMORY TYPE INFO"},
  48     { GRUB_EFI_MPS_TABLE_GUID, "MPS"},
  49     { GRUB_EFI_SAL_TABLE_GUID, "SAL"},
  50     { GRUB_EFI_SMBIOS_TABLE_GUID, "SMBIOS"},
  51     { GRUB_EFI_SYSTEM_RESOURCE_TABLE_GUID, "SYSTEM RESOURCE TABLE"},
  52     { GRUB_EFI_TIANO_CUSTOM_DECOMPRESS_GUID, "TIANO CUSTOM DECOMPRESS"},
  53     { GRUB_EFI_TSC_FREQUENCY_GUID, "TSC FREQUENCY"},
  54   };
  55
  56 static grub_err_t
  57 grub_cmd_lsefisystab (struct grub_command *cmd __attribute__ ((unused)),
  58                       int argc __attribute__ ((unused)),
  59                       char **args __attribute__ ((unused)))
  60 {
  61   const grub_efi_system_table_t *st = grub_efi_system_table;
  62   grub_efi_configuration_table_t *t;
  63   unsigned int i;
  64
  65   grub_printf ("Address: %p\n", st);
  66   grub_printf ("Signature: %016" PRIxGRUB_UINT64_T " revision: %08x\n",
  67                st->hdr.signature, st->hdr.revision);
  68   {
  69     char *vendor;
  70     grub_uint16_t *vendor_utf16;
  71     grub_printf ("Vendor: ");
  72
  73     for (vendor_utf16 = st->firmware_vendor; *vendor_utf16; vendor_utf16++);
  74     vendor = grub_malloc (4 * (vendor_utf16 - st->firmware_vendor) + 1);
  75     if (!vendor)
  76       return grub_errno;
  77     *grub_utf16_to_utf8 ((grub_uint8_t *) vendor, st->firmware_vendor,
  78                          vendor_utf16 - st->firmware_vendor) = 0;
  79     grub_printf ("%s", vendor);
  80     grub_free (vendor);
  81   }
  82
  83   grub_printf (", Version=%x\n", st->firmware_revision);
  84
  85   grub_printf ("%lld tables:\n", (long long) st->num_table_entries);
  86   t = st->configuration_table;
  87   for (i = 0; i < st->num_table_entries; i++)
  88     {
  89       unsigned int j;
  90
  91       grub_printf ("%p  ", t->vendor_table);
  92
  93       grub_printf ("%08x-%04x-%04x-",
  94                    t->vendor_guid.data1, t->vendor_guid.data2,
  95                    t->vendor_guid.data3);
  96       for (j = 0; j < 8; j++)
  97         grub_printf ("%02x", t->vendor_guid.data4[j]);
  98
  99       for (j = 0; j < ARRAY_SIZE (guid_mappings); j++)
 100         if (grub_memcmp (&guid_mappings[j].guid, &t->vendor_guid,
 101                          sizeof (grub_efi_guid_t)) == 0)
 102           grub_printf ("   %s", guid_mappings[j].name);
 103
 104       grub_printf ("\n");
 105       t++;
 106     }
 107   return GRUB_ERR_NONE;
 108 }
 109
 110 static grub_command_t cmd;
 111
 112 GRUB_MOD_INIT(lsefisystab)
 113 {
 114   cmd = grub_register_command ("lsefisystab", grub_cmd_lsefisystab,
 115                                "", "Display EFI system tables.");
 116 }
 117
 118 GRUB_MOD_FINI(lsefisystab)
 119 {
 120   grub_unregister_command (cmd);
 121 }