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Added B_STACK_AREA and B_KERNEL_STACK_AREA protection values.

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vm_store::fault() now returns a status_t.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10004 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2004-11-18 14:33:13 +00:00
parent 35bf46ca8d
commit 4eaf08ab83
1 changed files with 25 additions and 15 deletions
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headers/private/kernel/vm_types.h
+25 -15
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@@ -1,7 +1,10 @@
/*
** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
** Distributed under the terms of the NewOS License.
*/
/*
* Copyright 2002-2004, Axel Dörfler, [email protected].
* Distributed under the terms of the MIT License.
*
* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
* Distributed under the terms of the NewOS License.
*/
#ifndef _KERNEL_VM_TYPES_H
#define _KERNEL_VM_TYPES_H
@@ -138,7 +141,7 @@ typedef struct vm_store_ops {
bool (*has_page)(struct vm_store *backing_store, off_t offset);
status_t (*read)(struct vm_store *backing_store, off_t offset, const iovec *vecs, size_t count, size_t *_numBytes);
status_t (*write)(struct vm_store *backing_store, off_t offset, const iovec *vecs, size_t count, size_t *_numBytes);
int (*fault)(struct vm_store *backing_store, struct vm_address_space *aspace, off_t offset);
status_t (*fault)(struct vm_store *backing_store, struct vm_address_space *aspace, off_t offset);
void (*acquire_ref)(struct vm_store *backing_store);
void (*release_ref)(struct vm_store *backing_store);
} vm_store_ops;
@@ -152,8 +155,8 @@ enum {
enum {
// ToDo: these are here only temporarily - it's a private
// addition to the BeOS create_area() flags
B_ALREADY_WIRED = 6
// addition to the BeOS create_area() lock flags
B_ALREADY_WIRED = 6,
};
enum {
@@ -166,14 +169,21 @@ enum {
// its best, but create_area() will fail if it has to.
// Of course, the exact behaviour will be documented somewhere...
#define B_EXECUTE_AREA 4
// "execute" protection is not available on x86 - but defining it
// doesn't hurt too much, either :-)
// (but don't use it right now, it's not yet supported at all)
#define B_KERNEL_READ_AREA 8
#define B_KERNEL_WRITE_AREA 16
#define B_KERNEL_EXECUTE_AREA 32
#define B_STACK_AREA 8
// "stack" protection is not available on most platforms - it's used
// to only commit memory as needed, and have guard pages at the
// bottom of the stack.
// "execute" protection is currently ignored, but nevertheless, you
// should use it if you require to execute code in that area.
#define B_USER_PROTECTION (B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA)
#define B_KERNEL_PROTECTION (B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA)
#define B_KERNEL_READ_AREA 16
#define B_KERNEL_WRITE_AREA 32
#define B_KERNEL_EXECUTE_AREA 64
#define B_KERNEL_STACK_AREA 128
#define B_USER_PROTECTION \
(B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA)
#define B_KERNEL_PROTECTION \
(B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA | B_KERNEL_STACK_AREA)
#endif /* _KERNEL_VM_TYPES_H */