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