60 lines
1.6 KiB
ArmAsm
60 lines
1.6 KiB
ArmAsm
/*
|
|
* 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/symbol.h>
|
|
|
|
#ifdef BACKWARD
|
|
#define RELOCATOR_VARIABLE(x) VARIABLE(grub_relocator32_backward_ ## x)
|
|
#else
|
|
#define RELOCATOR_VARIABLE(x) VARIABLE(grub_relocator32_forward_ ## x)
|
|
#endif
|
|
|
|
.p2align 4 /* force 16-byte alignment */
|
|
|
|
VARIABLE (grub_relocator32_forward_start)
|
|
copycont1:
|
|
lb $5,0($2)
|
|
sb $5,0($3)
|
|
addiu $2, $2, 0x1
|
|
addiu $3, $3, 0x1
|
|
addiu $4, $4, 0xffff
|
|
subu $5,$4,$0
|
|
bne $5, $0, copycont1
|
|
#if __mips >= 2
|
|
sync
|
|
#endif
|
|
VARIABLE (grub_relocator32_forward_end)
|
|
|
|
VARIABLE (grub_relocator32_backward_start)
|
|
addu $3, $3, $4
|
|
addu $2, $2, $4
|
|
/* Backward movsl is implicitly off-by-one. compensate that. */
|
|
addiu $3, $3, 0xffff
|
|
addiu $2, $2, 0xffff
|
|
copycont2:
|
|
lb $5,0($2)
|
|
sb $5,0($3)
|
|
addiu $2, $2, 0xffff
|
|
addiu $3, $3, 0xffff
|
|
addiu $4, 0xffff
|
|
subu $5,$4,$0
|
|
bne $5, $0, copycont2
|
|
#if __mips >= 2
|
|
sync
|
|
#endif
|
|
VARIABLE (grub_relocator32_backward_end)
|