62 lines
2.0 KiB
ArmAsm
62 lines
2.0 KiB
ArmAsm
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@ 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 svc0x2F
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.type svc0x2F, %function
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svc0x2F:
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@ custom backdoor before kernel ext. is installed
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svc 0x2F
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bx lr
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.global convertVAToPA
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.type convertVAToPA, %function
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convertVAToPA:
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@ needs to be executed in supervisor mode
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mov r1, #0x1000
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sub r1, #1
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and r2, r0, r1
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bic r0, r1
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mcr p15, 0, r0, c7, c8, 0 @ VA to PA translation with privileged read permission check
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mrc p15, 0, r0, c7, c4, 0 @ read PA register
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tst r0, #1 @ failure bit
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bic r0, r1
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addeq r0, r2
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movne r0, #0
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bx lr
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.section .data
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.p2align 12
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.global kernel_extension
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kernel_extension: .incbin "build/kernel_extension.bin"
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.p2align 12
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kernel_extension_end:
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.global kernel_extension_size
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kernel_extension_size: .word kernel_extension_end - kernel_extension
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