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https://github.com/drasko/codezero.git
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df2317e7aa
- Fixed do_mmap() so that it returns mapped address, and various bugs. - A child seems to fork with new setup, but with incorrect return value. Need to use and test exregs() for fork + clone. - Shmat searches an unmapped area if input arg is invalid, do_mmap() should do this.
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(void *vaddr, unsigned long size, struct tcb *task);
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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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