96 lines
2.5 KiB
C
96 lines
2.5 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/>.
|
|
*/
|
|
|
|
void *
|
|
PREFIX (alloc) (grub_size_t size)
|
|
{
|
|
char *playground;
|
|
|
|
playground = grub_malloc ((RELOCATOR_SIZEOF (forward) + RELOCATOR_ALIGN)
|
|
+ size
|
|
+ (RELOCATOR_SIZEOF (backward) +
|
|
RELOCATOR_ALIGN));
|
|
if (!playground)
|
|
return 0;
|
|
|
|
*(grub_size_t *) playground = size;
|
|
|
|
return playground + RELOCATOR_SIZEOF (forward);
|
|
}
|
|
|
|
void *
|
|
PREFIX (realloc) (void *relocator, grub_size_t size)
|
|
{
|
|
char *playground;
|
|
|
|
playground = (char *) relocator - RELOCATOR_SIZEOF (forward);
|
|
|
|
playground = grub_realloc (playground,
|
|
(RELOCATOR_SIZEOF (forward) + RELOCATOR_ALIGN)
|
|
+ size
|
|
+ (RELOCATOR_SIZEOF (backward) + RELOCATOR_ALIGN));
|
|
if (!playground)
|
|
return 0;
|
|
|
|
*(grub_size_t *) playground = size;
|
|
|
|
return playground + RELOCATOR_SIZEOF (forward);
|
|
}
|
|
|
|
void
|
|
PREFIX(free) (void *relocator)
|
|
{
|
|
if (relocator)
|
|
grub_free ((char *) relocator - RELOCATOR_SIZEOF (forward));
|
|
}
|
|
|
|
grub_err_t
|
|
PREFIX (boot) (void *relocator, grub_uint32_t dest,
|
|
struct grub_relocator32_state state)
|
|
{
|
|
grub_size_t size;
|
|
char *playground;
|
|
|
|
playground = (char *) relocator - RELOCATOR_SIZEOF (forward);
|
|
size = *(grub_size_t *) playground;
|
|
|
|
if (UINT_TO_PTR (dest) >= relocator)
|
|
{
|
|
int overhead;
|
|
overhead =
|
|
ALIGN_UP (dest - RELOCATOR_SIZEOF (backward) - RELOCATOR_ALIGN,
|
|
RELOCATOR_ALIGN);
|
|
write_call_relocator_bw (relocator - overhead,
|
|
relocator - overhead,
|
|
dest - overhead, size + overhead, state);
|
|
}
|
|
else
|
|
{
|
|
int overhead;
|
|
|
|
overhead = ALIGN_UP (dest + size, RELOCATOR_ALIGN)
|
|
+ RELOCATOR_SIZEOF (forward) - (dest + size);
|
|
|
|
write_call_relocator_fw (relocator + size + overhead
|
|
- RELOCATOR_SIZEOF (forward),
|
|
relocator, dest, size + overhead, state);
|
|
}
|
|
|
|
/* Not reached. */
|
|
return GRUB_ERR_NONE;
|
|
}
|