1
0
Fork 0
mirror of https://github.com/Atmosphere-NX/Atmosphere.git synced 2024-12-25 11:46:05 +00:00
Atmosphere/fusee/fusee-primary/fusee-primary-main/src/start.s

55 lines
1.5 KiB
ArmAsm
Raw Normal View History

/*
* Copyright (c) 2018-2020 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/>.
*/
.macro CLEAR_GPR_REG_ITER
mov r\@, #0
.endm
.section .text.start, "ax", %progbits
.arm
.align 5
.global _start
.type _start, %function
_start:
/* Switch to system mode, mask all interrupts, clear all flags */
msr cpsr_cxsf, #0xDF
/* Set the stack pointer */
ldr sp, =__stack_top__
mov fp, #0
bl __program_init
/* Set r0 to r12 to 0 (for debugging) & call main */
.rept 13
CLEAR_GPR_REG_ITER
.endr
ldr r0, =__program_argc
ldr r1, =__program_argv
ldr lr, =__program_exit
ldr r0, [r0]
ldr r1, [r1]
b main
/* No need to include this in normal programs: */
.section .chainloader.text.start, "ax", %progbits
.arm
.align 5
.global relocate_and_chainload
.type relocate_and_chainload, %function
relocate_and_chainload:
ldr sp, =__stack_top__
b relocate_and_chainload_main