101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*
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* Copyright 2011 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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#include <metalsvm/stdlib.h>
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#include <metalsvm/stdio.h>
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#include <metalsvm/tasks_types.h>
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#include <metalsvm/spinlock.h>
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#include <metalsvm/vma.h>
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#include <metalsvm/errno.h>
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/*
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* add a new virtual memory region to the list of VMAs
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*/
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int vma_add(task_t* task, size_t start, size_t end, uint32_t type)
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{
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vma_t* new_vma;
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if (BUILTIN_EXPECT(!task || start > end, 0))
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return -EINVAL;
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new_vma = kmalloc(sizeof(new_vma));
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if (!new_vma)
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return -ENOMEM;
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spinlock_lock(&task->vma_lock);
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new_vma->start = start;
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new_vma->end = end;
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new_vma->type = type;
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if (!(task->vma_list)) {
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new_vma->next = new_vma->prev = NULL;
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task->vma_list = new_vma;
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} else {
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vma_t* tmp = task->vma_list;
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while (tmp->next && tmp->start < start)
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tmp = tmp->next;
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new_vma->next = tmp->next;
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new_vma->prev = tmp;
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tmp->next = new_vma;
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}
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spinlock_unlock(&task->vma_lock);
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return 0;
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}
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int vma_dump(task_t* task)
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{
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vma_t* tmp;
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if (BUILTIN_EXPECT(!task, 0))
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return -EINVAL;
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spinlock_lock(&task->vma_lock);
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tmp = task->vma_list;
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while (tmp) {
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kprintf("%8x - %8x: ", tmp->start, tmp->end);
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if (tmp->type & VMA_READ)
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kputs("r");
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else
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kputs("-");
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if (tmp->type & VMA_WRITE)
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kputs("w");
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else
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kputs("-");
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if (tmp->type & VMA_EXECUTE)
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kputs("x");
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else
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kputs("-");
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kputs("\n");
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tmp = tmp->next;
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}
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spinlock_unlock(&task->vma_lock);
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return 0;
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}
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