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Atmosphere / exosphere / rebootstub / src / start.s
/*
 * Copyright (c) 2018 Atmosphère-NX
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
.section .text.start
.align 4
.global _start
_start:
    b crt0

.global crt0
.type crt0, %function
crt0:
    @ clear all registers
    ldr r0, =0x52425430 @ RBT0
    mov r1, #0x0
    mov r2, #0x0
    mov r3, #0x0
    mov r4, #0x0
    mov r5, #0x0
    mov r6, #0x0
    mov r7, #0x0
    mov r8, #0x0
    mov r9, #0x0
    mov r10, #0x0
    mov r11, #0x0
    mov r12, #0x0
    mov lr, #0x0
    ldr sp, =0x40010000
    ldr pc, =0x40010000