mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-06 20:21:44 +00:00
70 lines
1.6 KiB
ArmAsm
70 lines
1.6 KiB
ArmAsm
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/*
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* Copyright (c) 2018 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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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.macro CLEAR_GPR_REG_ITER
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mov r\@, #0
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.endm
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.section .text.start, "ax", %progbits
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.arm
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.align 5
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.global _start
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.type _start, %function
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_start:
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/* Switch to system mode, mask all interrupts, clear all flags */
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msr cpsr_cxsf, #0xDF
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/* Backup current stack pointer. */
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mov r12, sp
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/* Set the stack pointer */
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ldr sp, =__stack_top__
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mov fp, #0
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/* Save context */
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push {r12, lr}
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/* Call init. */
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bl __program_init
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/* Set r0 to r12 to 0 (for debugging) & call main */
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.rept 13
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CLEAR_GPR_REG_ITER
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.endr
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ldr r0, =__program_argc
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ldr r1, =__program_argv
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ldr r0, [r0]
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ldr r1, [r1]
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bl main
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/* Save result. */
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push {r0}
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/* Exit manually. */
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bl __program_exit
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/* Restore result. */
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pop {r0}
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/* Restore context */
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pop {r12}
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pop {lr}
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/* Restore previous stack pointer. */
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mov sp, r12
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/* Return */
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bx lr
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