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do_munmap currently shrinks, splits, destroys vmas and unmaps the given virtual address range from the task. Unmapped pages may go completely unused but page reclamation will be done in another part of the pager rather than directly on the munmap instance.
36 lines
920 B
C
36 lines
920 B
C
/*
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* Prototypes for mmap/munmap functions that do the actual work.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __MM0_MMAP_H__
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#define __MM0_MMAP_H__
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#include <task.h>
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#include <vm_area.h>
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/* POSIX-defined mmap flags */
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#define PROT_READ 0x1
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#define PROT_WRITE 0x2
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#define PROT_EXEC 0x4
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#define PROT_NONE 0x0
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#define MAP_ANONYMOUS 0x20
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#define MAP_FIXED 0x10
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_GROWSDOWN 0x00100
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struct vm_area *vma_new(unsigned long pfn_start, unsigned long npages,
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unsigned int flags, unsigned long file_offset);
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int do_munmap(struct tcb *task, void *vaddr, unsigned long size);
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void *do_mmap(struct vm_file *mapfile, unsigned long f_offset, struct tcb *t,
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unsigned long map_address, unsigned int flags, unsigned int pages);
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int mmap_address_validate(struct tcb *t, unsigned long map_address,
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unsigned int vm_flags);
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#endif /* __MM0_MMAP_H__ */
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