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3cf7ecd1e4
and defines the macros needed by them.
* Renamed syscall sys_vm_map_file() to _kern_map_file() and changed the
path to an FD parameter. Changed vm_map_file() accordingly and
adjusted the kernel ELF loader and the runtime loader.
* Added syscall _kern_unmap_memory().
* Added bool unmapAddressRange parameter to vm_create_anonymous_area()
and map_backing_store(). If true and the address specification is
B_EXACT_ADDRESS, all areas in the specified address range will be
deleted (unless an area is covered only partially).
* Introduced B_SHARED_AREA flag, which is set on areas that have been
created by {vm,_user}_map_file() with REGION_NO_PRIVATE_MAP. When
fork()ing those areas won't be copied CoW, but rather be cloned. This
is needed for mmap() MAP_SHARED.
* {vm,_user}_map_file() also accept an FD argument < 0, in which case an
anonymous area is created.
* Implemented mmap() and munmap(). Currently there's the restriction
that we can't partially unmap areas. Otherwise the functions should be
rather compliant. We also support the non-POSIX extension
MAP_ANONYMOUS.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24964 a95241bf-73f2-0310-859d-f6bbb57e9c96
43 lines
922 B
C
43 lines
922 B
C
/*
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* Copyright 2008, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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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/types.h>
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// memory protection for mmap() and others
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#define PROT_READ 0x01
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#define PROT_WRITE 0x02
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#define PROT_EXEC 0x04
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#define PROT_NONE 0x00
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// mmap() flags
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#define MAP_SHARED 0x01 /* changes are seen by others */
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#define MAP_PRIVATE 0x02 /* changes are only seen by caller */
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#define MAP_FIXED 0x04 /* require mapping to specified addr */
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#define MAP_ANONYMOUS 0x08 /* no underlying object */
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#define MAP_ANON MAP_ANONYMOUS
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// mmap() error return code
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#define MAP_FAILED ((void*)-1)
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern void* mmap(void* address, size_t length, int protection, int flags,
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int fd, off_t offset);
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extern int munmap(void* address, size_t length);
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#ifdef __cplusplus
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}
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#endif
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#endif // _SYS_MMAN_H
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