51 lines
1.4 KiB
ArmAsm
51 lines
1.4 KiB
ArmAsm
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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#ifdef BACKWARD
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#define RELOCATOR_VARIABLE(x) VARIABLE(grub_relocator32_backward_ ## x)
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#else
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#define RELOCATOR_VARIABLE(x) VARIABLE(grub_relocator32_forward_ ## x)
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#endif
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.p2align 4 /* force 16-byte alignment */
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VARIABLE (grub_relocator32_forward_start)
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copycont1:
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lb $4,0($1)
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sb $4,0($2)
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addiu $3, $3, 0xffff
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subu $4,$3,$0
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bne $4, $0, copycont1
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VARIABLE (grub_relocator32_forward_end)
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VARIABLE (grub_relocator32_backward_start)
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addu $2, $2, $3
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addu $1, $1, $3
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/* Backward movsl is implicitly off-by-one. compensate that. */
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addiu $2, $2, 0xffff
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addiu $1, $1, 0xffff
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copycont2:
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lb $4,0($1)
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sb $4,0($2)
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addiu $3, 0xffff
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subu $4,$3,$0
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bne $4, $0, copycont2
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VARIABLE (grub_relocator32_backward_end)
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