74 lines
1.3 KiB
ArmAsm
74 lines
1.3 KiB
ArmAsm
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2021-7-14 JasonHu first version
|
|
*/
|
|
|
|
#include "rtconfig.h"
|
|
|
|
.section .text.lwp
|
|
|
|
/*
|
|
* void lwp_switch_to_user(frame);
|
|
*/
|
|
.global lwp_switch_to_user
|
|
lwp_switch_to_user:
|
|
movl 0x4(%esp), %esp
|
|
addl $4,%esp // skip intr no
|
|
popal
|
|
popl %gs
|
|
popl %fs
|
|
popl %es
|
|
popl %ds
|
|
addl $4, %esp // skip error_code
|
|
iret // enter to user mode
|
|
|
|
.extern arch_syscall_exit
|
|
.global sys_fork
|
|
.global sys_vfork
|
|
.global arch_fork_exit
|
|
sys_fork:
|
|
sys_vfork:
|
|
jmp _sys_fork
|
|
arch_fork_exit:
|
|
jmp arch_syscall_exit
|
|
|
|
.global sys_clone
|
|
.global arch_clone_exit
|
|
sys_clone:
|
|
jmp _sys_clone
|
|
arch_clone_exit:
|
|
jmp arch_syscall_exit
|
|
|
|
/**
|
|
* rt thread return code
|
|
*/
|
|
.align 4
|
|
.global lwp_thread_return
|
|
lwp_thread_return:
|
|
movl $1, %eax // eax = 1, sys_exit
|
|
movl $0, %ebx
|
|
int $0x80
|
|
.align 4
|
|
.global lwp_thread_return_end
|
|
lwp_thread_return_end:
|
|
|
|
#ifdef RT_USING_SIGNALS
|
|
/**
|
|
* signal return code
|
|
*/
|
|
.align 4
|
|
.global lwp_signal_return
|
|
lwp_signal_return:
|
|
movl $0xe000, %eax // special syscall id for return code
|
|
int $0x80
|
|
.align 4
|
|
.global lwp_signal_return_end
|
|
lwp_signal_return_end:
|
|
|
|
#endif /* RT_USING_SIGNALS */
|