9778b7b790
git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@2 315a16e6-25f9-4109-90ae-ca3045a26c18
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*
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*/
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#ifndef __ARCH_TASKS__
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#define __ARCH_TASKS__
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#include <metalsvm/stddef.h>
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#include <metalsvm/tasks_types.h>
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void NORETURN leave_task(void);
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inline static int create_default_frame(task_t* task, entry_point_t ep, void* arg)
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{
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unsigned int* top = (unsigned int*) task->top;
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unsigned int* esp;
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unsigned int* ebp;
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*top = 0xDEADBEAF; /* dead-end */
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ebp = top;
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top--;
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*top = (unsigned int) arg; /* argument of the function ep */
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top--;
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*top = (unsigned int) leave_task; /* exit function */
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top--;
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*top = (unsigned int) ep; /* entry point */
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top--;
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*top = 0x202; /* EFLAGS */
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esp = top;
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top--;
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*top = 0x00; /* EAX */
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top--;
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*top = 0x00; /* ECX */
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top--;
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*top = 0x00; /* EDX */
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top--;
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*top = 0x00; /* EBX */
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top--;
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*top = (unsigned int) esp; /* ESP */
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top--;
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*top = (unsigned int) ebp; /* EBP */
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top --;
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*top = 0x00; /* ESI */
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top --;
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*top = 0x00; /* EDI */
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top --;
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*top = 0x10; /* DS */
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top--;
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*top = 0x10; /* ES */
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top--;
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*top = 0x10; /* FS */
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top--;
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*top = 0x10; /* GS */
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task->top = (unsigned char*) top;
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return 0;
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}
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#endif
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