CloverBootloader/FileSystems/GrubFS/src/grub_driver.c
2019-09-03 12:58:42 +03:00

135 lines
4.2 KiB
C

/* grub_driver.c - Data that needs to be altered for each driver */
/*
* Copyright © 2014 Pete Batard <pete@akeo.ie>
* Based on GRUB -- GRand Unified Bootloader
* Copyright © 2001-2014 Free Software Foundation, Inc.
* Path sanitation code by Ludwig Nussel <ludwig.nussel@suse.de>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/err.h>
#include "driver.h"
/* Setup generic function calls for grub_<fs>_init and grub_<fs>_exit */
#define MAKE_FN_NAME(drivername, suffix) grub_ ## drivername ## _ ## suffix
#define GRUB_FS_CALL(drivername, suffix) MAKE_FN_NAME(drivername, suffix)
extern void GRUB_FS_CALL(DRIVERNAME, init)(void);
extern void GRUB_FS_CALL(DRIVERNAME, fini)(void);
#if defined(EXTRAMODULE)
extern void GRUB_FS_CALL(EXTRAMODULE, init)(void);
extern void GRUB_FS_CALL(EXTRAMODULE, fini)(void);
#endif
#if defined(EXTRAMODULE2)
extern void GRUB_FS_CALL(EXTRAMODULE2, init)(void);
extern void GRUB_FS_CALL(EXTRAMODULE2, fini)(void);
#endif
extern LIST_ENTRY FsListHead;
CHAR16 *DriverNameString = L"efifs " WIDEN(STRINGIFY(FS_DRIVER_VERSION_MAJOR)) L"."
WIDEN(STRINGIFY(FS_DRIVER_VERSION_MINOR)) L"." WIDEN(STRINGIFY(FS_DRIVER_VERSION_MICRO))
L" " WIDEN(STRINGIFY(DRIVERNAME)) L" driver (" WIDEN(PACKAGE_STRING) L")";
/**
* Set a filesystem GUID according to the filesystem name
* We use a static ID for the first 8 bytes, and then roll the lowercase name
* for the last 8 bytes (eg. exfat => {'e', 'x', 'f', 'a', 't', 'e', 'x', 'f'})
*/
EFI_GUID *
GetFSGuid(VOID)
{
INTN i, j, k, Len = StrLen(WIDEN(STRINGIFY(DRIVERNAME)));
static EFI_GUID Guid = { 0xEF1F5EF1, 0xF17E, 0x5857, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
CHAR16 *FsName = WIDEN(STRINGIFY(DRIVERNAME));
const CHAR16 *PlusName = L"plus";
EFI_UNICODE_COLLATION_PROTOCOL *UnicodeCollation;
UINT8 Data4[12]; /* +4 so that we can also reduce something like "1234567plus" into "1234567+" */
EFI_STATUS Status = EFI_SUCCESS;
Status = gBS->LocateProtocol(&gEfiUnicodeCollation2ProtocolGuid, NULL, (VOID**)&UnicodeCollation);
if (EFI_ERROR(Status) || (UnicodeCollation == NULL))
{
Status = gBS->LocateProtocol(&gEfiUnicodeCollationProtocolGuid, NULL, (VOID**)&UnicodeCollation);
}
if (EFI_ERROR(Status) || (UnicodeCollation == NULL))
{
Print(L"ERROR: Could not open unicode collation protocol\n");
return NULL;
}
UnicodeCollation->StrLwr(UnicodeCollation, FsName);
for (i = 0, j = 0, k = 0; j < ARRAYSIZE(Data4); i = (i+1)%Len, j++) {
/* Convert any 'plus' that is part of the name to '+' */
if (FsName[i] == PlusName[k]) {
if (++k == 4) {
k = 0;
j -= 3;
Data4[j] = (UINT8) '+';
} else {
Data4[j] = FsName[i];
}
} else {
k = 0;
Data4[j] = FsName[i];
}
}
if (FsName != NULL)
{
FreePool(FsName);
FsName = NULL;
}
CopyMem(Guid.Data4, Data4, 8);
return &Guid;
}
VOID
GrubDriverInit(VOID)
{
/* Register the relevant GRUB filesystem module */
GRUB_FS_CALL(DRIVERNAME, init)();
/* The GRUB compression routines are registered as extra module(s) */
// TODO: Eventually, we could try to turn each GRUB module into their
// own EFI driver, have them register their interface and consume that.
#if defined(EXTRAMODULE)
GRUB_FS_CALL(EXTRAMODULE, init)();
#endif
#if defined(EXTRAMODULE2)
GRUB_FS_CALL(EXTRAMODULE2, init)();
#endif
InitializeListHead(&FsListHead);
}
VOID
GrubDriverExit(VOID)
{
/* Unregister the relevant grub module */
GRUB_FS_CALL(DRIVERNAME, fini)();
#if defined(EXTRAMODULE)
GRUB_FS_CALL(EXTRAMODULE, fini)();
#endif
#if defined(EXTRAMODULE2)
GRUB_FS_CALL(EXTRAMODULE2, fini)();
#endif
}