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https://github.com/drasko/codezero.git
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35d2d275b6
- fixed is_err(x), was evaluating x twice, resulting in calling a function x twice. - Divided task initialisation into multiple parts. - MM0 now creates a tcb for itself and maintains memory regions of its own. - MM0's tcb is used for mmapping other tasks' regions. MM0 mmaps and prefaults those regions, instead of the typical mmap() and fault approach used by non-pager tasks. For example there's an internal shmget_shmat() path to map in other tasks' shm utcbs. Those mappings are then prefaulted into mm0's address space using the default fault handling path. - FS0 now reads task data into its utcb from mm0 via a syscall. FS0 shmat()s to utcbs of other tasks, e.g. mm0 and test0. FS0 then crashes, that is to be fixed and where this commit is left last.
32 lines
763 B
C
32 lines
763 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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int do_munmap(void *vaddr, unsigned long size, struct tcb *task);
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int 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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