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/*
* 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 */
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