33a7ac7557
. libc: add vfs_mmap, a way for vfs to initiate mmap()s. This is a good special case to have as vfs is a slightly different client from regular user processes. It doesn't do it for itself, and has the dev & inode info already so the callback to VFS for the lookup isn't necessary. So it has different info to have to give to VM. . libc: also add minix_mmap64() that accepts a 64-bit offset, even though our off_t is still 32 bit now. . On exec() time, try to mmap() in the executable if available. (It is not yet available in this commit.) . To support mmap(), add do_vm_call that allows VM to lookup (to ino+dev), do i/o from and close FD's on behalf of other processes. Change-Id: I831551e45a6781c74313c450eb9c967a68505932
122 lines
4 KiB
C
122 lines
4 KiB
C
/* $NetBSD: mman.h,v 1.44 2012/01/05 15:19:52 reinoud Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mman.h 8.2 (Berkeley) 1/9/95
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*/
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#ifndef _SYS_MMAN_H_
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#define _SYS_MMAN_H_
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#include <sys/featuretest.h>
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#include <machine/ansi.h>
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#include <minix/type.h>
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#ifdef _BSD_SIZE_T_
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typedef _BSD_SIZE_T_ size_t;
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#undef _BSD_SIZE_T_
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#endif
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#include <sys/ansi.h>
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#ifndef mode_t
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typedef __mode_t mode_t;
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#define mode_t __mode_t
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#endif
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#ifndef off_t
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typedef __off_t off_t; /* file offset */
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#define off_t __off_t
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#endif
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/*
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* Protections are chosen from these bits, or-ed together
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*/
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#define PROT_NONE 0x00 /* no permissions */
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#define PROT_READ 0x01 /* pages can be read */
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#define PROT_WRITE 0x02 /* pages can be written */
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#define PROT_EXEC 0x04 /* pages can be executed */
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/*
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* Flags contain sharing type and options.
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* Sharing types; choose one.
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*/
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#ifndef __minix
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#define MAP_SHARED 0x0001 /* share changes */
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#endif
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#define MAP_PRIVATE 0x0002 /* changes are private */
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/*
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* Mapping type
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*/
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#define MAP_ANON 0x0004 /* anonymous memory */
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/*
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* Minix specific flags.
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*/
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#define MAP_PREALLOC 0x0008 /* not on-demand */
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#define MAP_CONTIG 0x0010 /* contiguous in physical memory */
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#define MAP_LOWER16M 0x0020 /* physically below 16MB */
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#define MAP_ALIGN64K 0x0040 /* physically aligned at 64kB */
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#define MAP_LOWER1M 0x0080 /* physically below 16MB */
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#define MAP_ALIGNMENT_64KB MAP_ALIGN64K
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#define MAP_FIXED 0x0200 /* require mapping to happen at hint */
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#define MAP_THIRDPARTY 0x0400 /* perform on behalf of any process */
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#define MAP_UNINITIALIZED 0x0800 /* do not clear memory */
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#define MAP_FILE 0x1000 /* it's a file */
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/*
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* Error indicator returned by mmap(2)
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*/
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#define MAP_FAILED ((void *) -1) /* mmap() failed */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#ifndef __minix
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void * mmap(void *, size_t, int, int, int, off_t);
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int munmap(void *, size_t);
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#else
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void * minix_mmap(void *, size_t, int, int, int, off_t);
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void * minix_mmap64(void *, size_t, int, int, int, u64_t);
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void * minix_mmap_for(endpoint_t, void *, size_t, int, int, int, u64_t);
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int minix_munmap(void *, size_t);
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void * vm_remap(endpoint_t d, endpoint_t s, void *da, void *sa, size_t si);
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void * vm_remap_ro(endpoint_t d, endpoint_t s, void *da, void *sa, size_t si);
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int vm_unmap(endpoint_t endpt, void *addr);
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unsigned long vm_getphys(endpoint_t endpt, void *addr);
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u8_t vm_getrefcount(endpoint_t endpt, void *addr);
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#endif /* __minix */
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__END_DECLS
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#endif /* !_SYS_MMAN_H_ */
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