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/* Prepare efiemu. E.g. allocate memory, load the runtime
to appropriate place, etc */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/efiemu/efiemu.h>
#include <grub/crypto.h>
grub_err_t
SUFFIX (grub_efiemu_prepare) (struct grub_efiemu_prepare_hook *prepare_hooks,
struct grub_efiemu_configuration_table
*config_tables)
{
grub_err_t err;
int conftable_handle;
struct grub_efiemu_configuration_table *cur;
struct grub_efiemu_prepare_hook *curhook;
int cntconftables = 0;
struct SUFFIX (grub_efiemu_configuration_table) *conftables = 0;
int i;
int handle;
grub_off_t off;
grub_dprintf ("efiemu", "Preparing EfiEmu\n");
/* Request space for the list of configuration tables */
for (cur = config_tables; cur; cur = cur->next)
cntconftables++;
conftable_handle
= grub_efiemu_request_memalign (GRUB_EFIEMU_PAGESIZE,
cntconftables * sizeof (*conftables),
GRUB_EFI_RUNTIME_SERVICES_DATA);
/* Switch from phase 1 (counting) to phase 2 (real job) */
grub_efiemu_alloc_syms ();
grub_efiemu_mm_do_alloc ();
grub_efiemu_write_sym_markers ();
grub_efiemu_system_table32 = 0;
grub_efiemu_system_table64 = 0;
/* Execute hooks */
for (curhook = prepare_hooks; curhook; curhook = curhook->next)
curhook->hook (curhook->data);
/* Move runtime to its due place */
err = grub_efiemu_loadcore_load ();
if (err)
{
grub_efiemu_unload ();
return err;
}
err = grub_efiemu_resolve_symbol ("efiemu_system_table", &handle, &off);
if (err)
{
grub_efiemu_unload ();
return err;
}
SUFFIX (grub_efiemu_system_table)
= (struct SUFFIX (grub_efi_system_table) *)
((grub_uint8_t *) grub_efiemu_mm_obtain_request (handle) + off);
/* Put pointer to the list of configuration tables in system table */
err = grub_efiemu_write_value
(&(SUFFIX (grub_efiemu_system_table)->configuration_table), 0,
conftable_handle, 0, 1,
sizeof (SUFFIX (grub_efiemu_system_table)->configuration_table));
if (err)
{
grub_efiemu_unload ();
return err;
}
SUFFIX(grub_efiemu_system_table)->num_table_entries = cntconftables;
/* Fill the list of configuration tables */
conftables = (struct SUFFIX (grub_efiemu_configuration_table) *)
grub_efiemu_mm_obtain_request (conftable_handle);
i = 0;
for (cur = config_tables; cur; cur = cur->next, i++)
{
grub_memcpy (&(conftables[i].vendor_guid), &(cur->guid),
sizeof (cur->guid));
if (cur->get_table)
conftables[i].vendor_table = (grub_addr_t) cur->get_table (cur->data);
else
conftables[i].vendor_table = (grub_addr_t) cur->data;
}
err = SUFFIX (grub_efiemu_crc) ();
if (err)
{
grub_efiemu_unload ();
return err;
}
grub_dprintf ("efiemu","system_table = %p, conftables = %p (%d entries)\n",
SUFFIX (grub_efiemu_system_table), conftables, cntconftables);
return GRUB_ERR_NONE;
}
grub_err_t
SUFFIX (grub_efiemu_crc) (void)
{
grub_err_t err;
int handle;
grub_off_t off;
struct SUFFIX (grub_efiemu_runtime_services) *runtime_services;
grub_uint32_t crc32_val;
if (GRUB_MD_CRC32->mdlen != 4)
return grub_error (GRUB_ERR_BUG, "incorrect mdlen");
/* compute CRC32 of runtime_services */
err = grub_efiemu_resolve_symbol ("efiemu_runtime_services",
&handle, &off);
if (err)
return err;
runtime_services = (struct SUFFIX (grub_efiemu_runtime_services) *)
((grub_uint8_t *) grub_efiemu_mm_obtain_request (handle) + off);
runtime_services->hdr.crc32 = 0;
grub_crypto_hash (GRUB_MD_CRC32, &crc32_val,
runtime_services, runtime_services->hdr.header_size);
runtime_services->hdr.crc32 =
grub_be_to_cpu32(crc32_val);
err = grub_efiemu_resolve_symbol ("efiemu_system_table", &handle, &off);
if (err)
return err;
/* compute CRC32 of system table */
SUFFIX (grub_efiemu_system_table)->hdr.crc32 = 0;
grub_crypto_hash (GRUB_MD_CRC32, &crc32_val,
SUFFIX (grub_efiemu_system_table),
SUFFIX (grub_efiemu_system_table)->hdr.header_size);
SUFFIX (grub_efiemu_system_table)->hdr.crc32 =
grub_be_to_cpu32(crc32_val);
grub_dprintf ("efiemu","system_table = %p, runtime_services = %p\n",
SUFFIX (grub_efiemu_system_table), runtime_services);
return GRUB_ERR_NONE;
}
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