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Added new private area protection flag B_KERNEL_AREA, which prevents all

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changes to the area (delete, resize, clone) from userland.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25450 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2008-05-11 16:02:13 +00:00
parent 2873ace1f1
commit 58148e2e02
2 changed files with 181 additions and 133 deletions
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headers/private/kernel/vm.h
+10 -8
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@@ -44,13 +44,15 @@ struct vnode;
(B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA \
| B_KERNEL_STACK_AREA)
// TODO: These aren't really a protection flags, but since the "protection"
// field is the only flag field, we currently use it for this.
// A cleaner approach would be appreciated - maybe just an official generic
// flags region in the protection field.
#define B_OVERCOMMITTING_AREA 0x1000
#define B_SHARED_AREA 0x2000
// TODO: These aren't really a protection flags, but since the "protection"
// field is the only flag field, we currently use it for this.
// A cleaner approach would be appreciated - maybe just an official generic
// flags region in the protection field.
#define B_KERNEL_AREA 0x4000
// Usable from userland according to its protection flags, but the area
// itself is not deletable, resizable, etc from userland.
#define B_USER_AREA_FLAGS (B_USER_PROTECTION)
#define B_KERNEL_AREA_FLAGS \
@@ -110,7 +112,7 @@ status_t vm_reserve_address_range(team_id team, void **_address,
uint32 addressSpec, addr_t size, uint32 flags);
area_id vm_create_anonymous_area(team_id team, const char *name, void **address,
uint32 addressSpec, addr_t size, uint32 wiring, uint32 protection,
bool unmapAddressRange);
bool unmapAddressRange, bool kernel);
area_id vm_map_physical_memory(team_id team, const char *name, void **address,
uint32 addressSpec, addr_t size, uint32 protection, addr_t phys_addr);
area_id vm_map_file(team_id aid, const char *name, void **address,
@@ -124,8 +126,8 @@ area_id vm_copy_area(team_id team, const char *name, void **_address,
uint32 addressSpec, uint32 protection, area_id sourceID);
area_id vm_clone_area(team_id team, const char *name, void **address,
uint32 addressSpec, uint32 protection, uint32 mapping,
area_id sourceArea);
status_t vm_delete_area(team_id teamID, area_id areaID);
area_id sourceArea, bool kernel);
status_t vm_delete_area(team_id teamID, area_id areaID, bool kernel);
status_t vm_create_vnode_cache(struct vnode *vnode, struct vm_cache **_cache);
struct vm_area *vm_area_lookup(struct vm_address_space *addressSpace,
addr_t address);