102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2010 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/types.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/decompressor.h>
|
|
|
|
void *
|
|
memset (void *s, int c, grub_size_t len)
|
|
{
|
|
grub_uint8_t *ptr;
|
|
for (ptr = s; len; ptr++, len--)
|
|
*ptr = c;
|
|
return s;
|
|
}
|
|
|
|
void *
|
|
grub_memmove (void *dest, const void *src, grub_size_t n)
|
|
{
|
|
char *d = (char *) dest;
|
|
const char *s = (const char *) src;
|
|
|
|
if (d < s)
|
|
while (n--)
|
|
*d++ = *s++;
|
|
else
|
|
{
|
|
d += n;
|
|
s += n;
|
|
|
|
while (n--)
|
|
*--d = *--s;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
int
|
|
grub_memcmp (const void *s1, const void *s2, grub_size_t n)
|
|
{
|
|
const unsigned char *t1 = s1;
|
|
const unsigned char *t2 = s2;
|
|
|
|
while (n--)
|
|
{
|
|
if (*t1 != *t2)
|
|
return (int) *t1 - (int) *t2;
|
|
|
|
t1++;
|
|
t2++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int memcmp (const void *s1, const void *s2, grub_size_t n)
|
|
__attribute__ ((alias ("grub_memcmp")));
|
|
|
|
void *memmove (void *dest, const void *src, grub_size_t n)
|
|
__attribute__ ((alias ("grub_memmove")));
|
|
|
|
void *memcpy (void *dest, const void *src, grub_size_t n)
|
|
__attribute__ ((alias ("grub_memmove")));
|
|
|
|
void *grub_decompressor_scratch;
|
|
|
|
void
|
|
find_scratch (void *src, void *dst, unsigned long srcsize,
|
|
unsigned long dstsize)
|
|
{
|
|
#ifdef _mips
|
|
/* Decoding from ROM. */
|
|
if (((grub_addr_t) src & 0x10000000))
|
|
{
|
|
grub_decompressor_scratch = (void *) ALIGN_UP((grub_addr_t) dst + dstsize,
|
|
256);
|
|
return;
|
|
}
|
|
#endif
|
|
if ((char *) src + srcsize > (char *) dst + dstsize)
|
|
grub_decompressor_scratch = (void *) ALIGN_UP ((grub_addr_t) src + srcsize,
|
|
256);
|
|
else
|
|
grub_decompressor_scratch = (void *) ALIGN_UP ((grub_addr_t) dst + dstsize,
|
|
256);
|
|
return;
|
|
}
|