mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-15 01:26:34 +00:00
70 lines
No EOL
1.6 KiB
ArmAsm
70 lines
No EOL
1.6 KiB
ArmAsm
/*
|
|
* 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/>.
|
|
*/
|
|
|
|
.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
|
|
|
|
/* Backup current stack pointer. */
|
|
mov r12, sp
|
|
|
|
/* Set the stack pointer */
|
|
ldr sp, =__stack_top__
|
|
mov fp, #0
|
|
|
|
/* Save context */
|
|
push {r12, lr}
|
|
|
|
/* Call init. */
|
|
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 r0, [r0]
|
|
ldr r1, [r1]
|
|
bl main
|
|
|
|
/* Save result. */
|
|
push {r0}
|
|
|
|
/* Exit manually. */
|
|
bl __program_exit
|
|
|
|
/* Restore result. */
|
|
pop {r0}
|
|
|
|
/* Restore context */
|
|
pop {r12}
|
|
pop {lr}
|
|
|
|
/* Restore previous stack pointer. */
|
|
mov sp, r12
|
|
|
|
/* Return */
|
|
bx lr |