21db0d45bd
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44 lines
1.6 KiB
ArmAsm
44 lines
1.6 KiB
ArmAsm
@ This file is part of Luma3DS
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@ Copyright (C) 2016-2017 Aurora Wright, TuxSH
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@
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@ This program 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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@ This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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@
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@ Additional Terms 7.b and 7.c of GPLv3 apply to this file:
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@ * Requiring preservation of specified reasonable legal notices or
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@ author attributions in that material or in the Appropriate Legal
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@ Notices displayed by works containing it.
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@ * Prohibiting misrepresentation of the origin of that material,
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@ or requiring that modified versions of such material be marked in
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@ reasonable ways as different from the original version.
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.text
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.arm
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.balign 4
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.global Backdoor
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.type Backdoor, %function
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Backdoor:
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@ Nintendo's code
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bic r1, sp, #0xff
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orr r1, r1, #0xf00
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add r1, r1, #0x28 @ get user stack.
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ldr r2, [r1]
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stmdb r2!, {sp, lr}
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mov sp, r2 @ sp_svc = sp_usr. You'll get nice crashes if an interrupt or context switch occurs during svcBackdoor
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blx r0
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pop {r0, r1}
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mov sp, r0
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bx r1
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