346 lines
8.4 KiB
C
346 lines
8.4 KiB
C
/*
|
||
* 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/>.
|
||
*/
|
||
|
||
/* This is an emulation of EFI runtime services.
|
||
This allows a more uniform boot on i386 machines.
|
||
As it emulates only runtime service it isn't able
|
||
to chainload EFI bootloader on non-EFI system. */
|
||
|
||
|
||
#include <grub/file.h>
|
||
#include <grub/err.h>
|
||
#include <grub/normal.h>
|
||
#include <grub/mm.h>
|
||
#include <grub/dl.h>
|
||
#include <grub/misc.h>
|
||
#include <grub/efiemu/efiemu.h>
|
||
#include <grub/machine/efiemu.h>
|
||
#include <grub/command.h>
|
||
|
||
/* System table. Two version depending on mode */
|
||
grub_efi_system_table32_t *grub_efiemu_system_table32 = 0;
|
||
grub_efi_system_table64_t *grub_efiemu_system_table64 = 0;
|
||
/* Modules may need to execute some actions after memory allocation happens */
|
||
static struct grub_efiemu_prepare_hook *efiemu_prepare_hooks = 0;
|
||
/* Linked list of configuration tables */
|
||
static struct grub_efiemu_configuration_table *efiemu_config_tables = 0;
|
||
static int prepared = 0;
|
||
|
||
/* Free all allocated space */
|
||
grub_err_t
|
||
grub_efiemu_unload (void)
|
||
{
|
||
struct grub_efiemu_configuration_table *cur, *d;
|
||
struct grub_efiemu_prepare_hook *curhook, *d2;
|
||
grub_efiemu_loadcore_unload ();
|
||
|
||
grub_efiemu_mm_unload ();
|
||
|
||
for (cur = efiemu_config_tables; cur;)
|
||
{
|
||
d = cur->next;
|
||
if (cur->unload)
|
||
cur->unload (cur->data);
|
||
grub_free (cur);
|
||
cur = d;
|
||
}
|
||
efiemu_config_tables = 0;
|
||
|
||
for (curhook = efiemu_prepare_hooks; curhook;)
|
||
{
|
||
d2 = curhook->next;
|
||
if (curhook->unload)
|
||
curhook->unload (curhook->data);
|
||
grub_free (curhook);
|
||
curhook = d2;
|
||
}
|
||
efiemu_prepare_hooks = 0;
|
||
|
||
prepared = 0;
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
/* Remove previously registered table from the list */
|
||
grub_err_t
|
||
grub_efiemu_unregister_configuration_table (grub_efi_guid_t guid)
|
||
{
|
||
struct grub_efiemu_configuration_table *cur, *prev;
|
||
|
||
/* Special treating if head is to remove */
|
||
while (efiemu_config_tables
|
||
&& !grub_memcmp (&(efiemu_config_tables->guid), &guid, sizeof (guid)))
|
||
{
|
||
if (efiemu_config_tables->unload)
|
||
efiemu_config_tables->unload (efiemu_config_tables->data);
|
||
cur = efiemu_config_tables->next;
|
||
grub_free (efiemu_config_tables);
|
||
efiemu_config_tables = cur;
|
||
}
|
||
if (!efiemu_config_tables)
|
||
return GRUB_ERR_NONE;
|
||
|
||
/* Remove from chain */
|
||
for (prev = efiemu_config_tables, cur = prev->next; cur;)
|
||
if (grub_memcmp (&(cur->guid), &guid, sizeof (guid)) == 0)
|
||
{
|
||
if (cur->unload)
|
||
cur->unload (cur->data);
|
||
prev->next = cur->next;
|
||
grub_free (cur);
|
||
cur = prev->next;
|
||
}
|
||
else
|
||
{
|
||
prev = cur;
|
||
cur = cur->next;
|
||
}
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
grub_err_t
|
||
grub_efiemu_register_prepare_hook (grub_err_t (*hook) (void *data),
|
||
void (*unload) (void *data),
|
||
void *data)
|
||
{
|
||
struct grub_efiemu_prepare_hook *nhook;
|
||
if (! hook)
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "you must supply the hook");
|
||
nhook = (struct grub_efiemu_prepare_hook *) grub_malloc (sizeof (*nhook));
|
||
if (! nhook)
|
||
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't prepare hook");
|
||
nhook->hook = hook;
|
||
nhook->unload = unload;
|
||
nhook->data = data;
|
||
nhook->next = efiemu_prepare_hooks;
|
||
efiemu_prepare_hooks = nhook;
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
/* Register a configuration table either supplying the address directly
|
||
or with a hook
|
||
*/
|
||
grub_err_t
|
||
grub_efiemu_register_configuration_table (grub_efi_guid_t guid,
|
||
void * (*get_table) (void *data),
|
||
void (*unload) (void *data),
|
||
void *data)
|
||
{
|
||
struct grub_efiemu_configuration_table *tbl;
|
||
grub_err_t err;
|
||
|
||
if (! get_table && ! data)
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||
"you must set at least get_table or data");
|
||
if ((err = grub_efiemu_unregister_configuration_table (guid)))
|
||
return err;
|
||
|
||
tbl = (struct grub_efiemu_configuration_table *) grub_malloc (sizeof (*tbl));
|
||
if (! tbl)
|
||
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't register table");
|
||
|
||
tbl->guid = guid;
|
||
tbl->get_table = get_table;
|
||
tbl->unload = unload;
|
||
tbl->data = data;
|
||
tbl->next = efiemu_config_tables;
|
||
efiemu_config_tables = tbl;
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_cmd_efiemu_unload (grub_command_t cmd __attribute__ ((unused)),
|
||
int argc __attribute__ ((unused)),
|
||
char *args[] __attribute__ ((unused)))
|
||
{
|
||
return grub_efiemu_unload ();
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_cmd_efiemu_prepare (grub_command_t cmd __attribute__ ((unused)),
|
||
int argc __attribute__ ((unused)),
|
||
char *args[] __attribute__ ((unused)))
|
||
{
|
||
return grub_efiemu_prepare ();
|
||
}
|
||
|
||
|
||
|
||
|
||
int
|
||
grub_efiemu_exit_boot_services (grub_efi_uintn_t map_key
|
||
__attribute__ ((unused)))
|
||
{
|
||
/* Nothing to do here yet */
|
||
return 1;
|
||
}
|
||
|
||
int
|
||
grub_efiemu_finish_boot_services (void)
|
||
{
|
||
/* Nothing to do here yet */
|
||
return 1;
|
||
}
|
||
|
||
/* Load the runtime from the file FILENAME. */
|
||
static grub_err_t
|
||
grub_efiemu_load_file (const char *filename)
|
||
{
|
||
grub_file_t file;
|
||
grub_err_t err;
|
||
|
||
file = grub_file_open (filename);
|
||
if (! file)
|
||
return 0;
|
||
|
||
err = grub_efiemu_mm_init ();
|
||
if (err)
|
||
{
|
||
grub_file_close (file);
|
||
grub_efiemu_unload ();
|
||
return grub_error (grub_errno, "couldn't init memory management");
|
||
}
|
||
|
||
grub_dprintf ("efiemu", "mm initialized\n");
|
||
|
||
err = grub_efiemu_loadcore_init (file);
|
||
if (err)
|
||
{
|
||
grub_file_close (file);
|
||
grub_efiemu_unload ();
|
||
return err;
|
||
}
|
||
|
||
grub_file_close (file);
|
||
|
||
/* For configuration tables entry in system table. */
|
||
grub_efiemu_request_symbols (1);
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
grub_err_t
|
||
grub_efiemu_autocore (void)
|
||
{
|
||
const char *prefix;
|
||
char *filename;
|
||
char *suffix;
|
||
grub_err_t err;
|
||
|
||
if (grub_efiemu_sizeof_uintn_t () != 0)
|
||
return GRUB_ERR_NONE;
|
||
|
||
prefix = grub_env_get ("prefix");
|
||
|
||
if (! prefix)
|
||
return grub_error (GRUB_ERR_FILE_NOT_FOUND,
|
||
"couldn't find efiemu core because prefix "
|
||
"isn't set");
|
||
|
||
suffix = grub_efiemu_get_default_core_name ();
|
||
|
||
filename = grub_xasprintf ("%s/%s", prefix, suffix);
|
||
if (! filename)
|
||
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
|
||
"couldn't allocate temporary space");
|
||
|
||
|
||
err = grub_efiemu_load_file (filename);
|
||
grub_free (filename);
|
||
if (err)
|
||
return err;
|
||
#ifndef GRUB_MACHINE_EMU
|
||
err = grub_machine_efiemu_init_tables ();
|
||
if (err)
|
||
return err;
|
||
#endif
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
grub_err_t
|
||
grub_efiemu_prepare (void)
|
||
{
|
||
grub_err_t err;
|
||
|
||
if (prepared)
|
||
return GRUB_ERR_NONE;
|
||
|
||
grub_dprintf ("efiemu", "Preparing %d-bit efiemu\n",
|
||
8 * grub_efiemu_sizeof_uintn_t ());
|
||
|
||
err = grub_efiemu_autocore ();
|
||
|
||
/* Create NVRAM. */
|
||
grub_efiemu_pnvram ();
|
||
|
||
prepared = 1;
|
||
|
||
if (grub_efiemu_sizeof_uintn_t () == 4)
|
||
return grub_efiemu_prepare32 (efiemu_prepare_hooks, efiemu_config_tables);
|
||
else
|
||
return grub_efiemu_prepare64 (efiemu_prepare_hooks, efiemu_config_tables);
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_cmd_efiemu_load (grub_command_t cmd __attribute__ ((unused)),
|
||
int argc, char *args[])
|
||
{
|
||
grub_err_t err;
|
||
|
||
grub_efiemu_unload ();
|
||
|
||
if (argc != 1)
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "filename required");
|
||
|
||
err = grub_efiemu_load_file (args[0]);
|
||
if (err)
|
||
return err;
|
||
#ifndef GRUB_MACHINE_EMU
|
||
err = grub_machine_efiemu_init_tables ();
|
||
if (err)
|
||
return err;
|
||
#endif
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static grub_command_t cmd_loadcore, cmd_prepare, cmd_unload;
|
||
|
||
GRUB_MOD_INIT(efiemu)
|
||
{
|
||
cmd_loadcore = grub_register_command ("efiemu_loadcore",
|
||
grub_cmd_efiemu_load,
|
||
"FILE",
|
||
"Load and initialize EFI emulator.");
|
||
cmd_prepare = grub_register_command ("efiemu_prepare",
|
||
grub_cmd_efiemu_prepare,
|
||
0,
|
||
"Finalize loading of EFI emulator.");
|
||
cmd_unload = grub_register_command ("efiemu_unload", grub_cmd_efiemu_unload,
|
||
0,
|
||
"Unload EFI emulator.");
|
||
}
|
||
|
||
GRUB_MOD_FINI(efiemu)
|
||
{
|
||
grub_unregister_command (cmd_loadcore);
|
||
grub_unregister_command (cmd_prepare);
|
||
grub_unregister_command (cmd_unload);
|
||
}
|